2024-03-28T09:13:45Zhttps://iris.polito.it/oai/requestoai:iris.polito.it:11583/29712532024-03-18T20:28:22Zcom_11583_2614429com_11583_2614425col_11583_2614405
In-wheel and on-board motors in BEV: lateral and vertical performance comparison
de Carvalho Pinheiro, Henrique
Messana, Alessandro
Carello, Massimiliana
de Carvalho Pinheiro, Henrique
Messana, Alessandro
Carello, Massimiliana
Vehicle Dynamic
Multibody
Electric Vehicle
Electric Motor
Handling
Comfort
Following the electrification trends in the automotive sector, many powertrain architectures are being studied, and among them a very interesting possibility – not yet fully developed – regards the use of in-wheel motors. This kind of electric machine positioned inside the wheel rims grants the vehicles great design freedom and opens numerous possibilities in terms of vehicle control, however some issues regarding handling and comfort are raised with the increase of the unsprung mass. This paper proposes a comprehensive study, combining the electric modelling of the motors, inverter, and battery using Simulink and its co-simulation with multibody simulation in Adams/CAR, in such a way that a full electromechanical coupling is achieved, and a full range of dynamic phenomena can be inquired both for an in-wheel and an onboard EV setup. The paper focuses on lateral and vertical performance, since they represent the main controversies in the adoption of in-wheel motors, and promising results are obtained.
2022
info:eu-repo/semantics/conferenceObject
http://hdl.handle.net/11583/2971253
10.1109/EEEIC/ICPSEurope54979.2022.9854774
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85138007347
info:eu-repo/semantics/altIdentifier/isbn/978-1-6654-8537-1
https://ieeexplore.ieee.org/document/9854774
info:eu-repo/semantics/altIdentifier/wos/WOS:000861373200223
eng
ispartofbook:IEEE Xplore
2022 IEEE International Conference on Environment and Electrical Engineering and 2022 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)
volume:1
firstpage:1
lastpage:6
numberofpages:6
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29786602023-06-29T07:02:41Zcom_11583_2614429com_11583_2614425col_11583_2614405
Integrating Aerial Base Stations for sustainable urban mobile networks
Meo, M
Renga, D
Scarpa, F
Meo, M
Renga, D
Scarpa, F
Non-Terrestrial Network
HAPS
5G/6G Network
Energy Efficiency
Renewable Energy
The extensive densification of mobile networks is increasing the network energy consumption and leading to remarkable economical and sustainability concerns. At the same time, regulatory and physical constraints, especially in urban environments, may limit the network expansion and the free installation of Base Stations (BSs). In this context, High Altitude Platform Stations (HAPSs) are emerging as a promising solution to host aerial BSs that can provide additional capacity over a wide geographical area, to offload the on-ground mobile network and support a sustainable transition towards the 6G era. This paper investigates the potential of HAPS offloading to reduce the energy demand from the grid and the operational cost of mobile networks. Our results highlight the effectiveness of HAPS offloading in reducing the size of the RE supply that is required to achieve grid energy reduction on the terrestrial network, thus enhancing the feasibility of a sustainable evolution towards 6G networks. Different allocation strategies are designed and analyzed under several configuration settings, to dynamically adapt the HAPS capacity to the traffic variability in space and over time. A fine tuning of the strategy settings is proved effective in trading off physical constraints, operational cost, sustainability goals, and Quality of Service.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2978660
10.1109/GLOBECOM48099.2022.10001387
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85146955890
info:eu-repo/semantics/altIdentifier/isbn/978-1-6654-3540-6
https://ieeexplore.ieee.org/document/10001387
info:eu-repo/semantics/altIdentifier/wos/WOS:000922633501125
eng
ispartofbook:Global Communications Conference
2022 IEEE Global Communications Conference
firstpage:1727
lastpage:1733
numberofpages:7
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
place:345 E 47TH ST, NEW YORK, NY 10017 USA
oai:iris.polito.it:11583/29838392024-03-14T01:40:24Zcom_11583_2614429com_11583_2614425col_11583_2614405
Wearable Data Generation Using Time-Series Generative Adversarial Networks for Hydration Monitoring
Sabry, Farida
Labda, Wadha
Eltaras, Tamer
Hamza, Fatima
Alzoubi, Khawla
Malluhi, Qutaibah
Sabry, Farida
Labda, Wadha
Eltaras, Tamer
Hamza, Fatima
Alzoubi, Khawla
Malluhi, Qutaibah
Collection of biosignals data from wearable devices for machine learning tasks can sometimes be expensive and time-consuming and may violate privacy policies and regulations. Successful and accurate generation of these signals can help in many wearable devices applications as well as overcoming the privacy concerns accompanied with healthcare data. Generative adversarial networks (GANs) have been used successfully in generating images in data-limited situations. Using GANs for generating other types of data has been actively researched in the last few years. In this paper, we investigate the possibility of using a time-series GAN (TimeGAN) to generate wearable devices data for a hydration monitoring task to predict the last drinking time of a user. Challenges encountered in the case of biosignals generation and state-of-the-art methods for evaluation of the generated signals are discussed. Results have shown the applicability of using TimeGAN for this task based on quantitative and visual qualitative metrics. Limitations on the quality of the generated signals were highlighted with suggesting ways for improvement.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2983839
10.5220/0011757200003414
info:eu-repo/semantics/altIdentifier/isbn/978-989-758-631-6
https://www.scitepress.org/PublishedPapers/2023/117572/
eng
ispartofbook:Proceedings of the16th International Joint Conferenceon Biomedical Engineering Systems and Technologies (BIOSTEC 2023)
BIOSTEC 2023
firstpage:94
lastpage:105
numberofpages:12
info:eu-repo/semantics/openAccess
Scitepress
oai:iris.polito.it:11583/29704812024-03-08T07:38:42Zcom_11583_2614429com_11583_2614425col_11583_2614405
Genetic algorithm-based optimisation of the few-group structure for lead fast reactor analysis
Mattia Massone
Nicolo Abrate
Giuseppe Francesco Nallo
Domenico Valerio
Sandra Dulla
Piero Ravetto
Massone, MATTIA VINCENZO EDOARDO
Abrate, Nicolo'
Nallo, GIUSEPPE FRANCESCO
Valerio, Domenico
Dulla, Sandra
Ravetto, Piero
lead fast reactor
genetic algorithm
genetic optimisation
energy collapsing
multi-group
SIMMER
The optimal choice of the few-group structure for full-core transient analyses is still an open issue in reactor physics, especially for fast systems (as the lead fast reactor). One possible approach to select the group boundaries is represented by heuristic search algorithms, such as evolutionary ones. In this paper, a genetic algorithm coupled with the SIMMER code is employed to determine optimized six-group boundaries for the analysis of the ALFRED reactor. The Serpent Monte Carlo code is adopted to produce both the fine-group cross section library and the fine-group flux, used as a figure of merit to drive the genetic optimisation. The results show that the algorithm is indeed able to find satisfactory solutions that comply with the set objectives and can be reasonably interpreted in light of the underlying physics of the considered core.
2022
info:eu-repo/semantics/conferenceObject
http://hdl.handle.net/11583/2970481
https://www.ans.org/pubs/proceedings/article-51120/
eng
ispartofbook:Proceedings of the PHYSOR 2022 International Conference
PHYSOR 2022 International Conference
firstpage:1388
lastpage:1397
numberofpages:10
info:eu-repo/semantics/closedAccess
ELETTRONICO
American Nuclear Society
country:USA
oai:iris.polito.it:11583/29789212024-03-06T01:40:54Zcom_11583_2614429com_11583_2614425col_11583_2614405
Implementation of a graphene impedance quantum standard with an electronic fully digital impedance bridge
Martina Marzano
Vincenzo D’Elia
Massimo Ortolano
Luca Callegaro
Marzano, Martina
D’Elia, Vincenzo
Ortolano, Massimo
Callegaro, Luca
Metrology
calibration
capacitance measurement
impedance measurement
graphene
The units of electrical impedance can be realized by using the quantum Hall resistance at AC (ACQHR). Impedance traceability chains based on the ACQHR can be obtained by exploiting novel digital impedance bridges. An affordable and easy-to-operate impedance quantum standard can be obtained by combining graphene quantum Hall resistance standards in the AC regime and these novel digital impedance bridges. We developed a four-terminal-pair electronic digital impedance bridge able to calibrate a capacitance standard directly against a graphene ACQHR standard with a relative uncertainty of about 1e-7 to implement the future INRIM traceability chain of the farad. The working principle, implementation, validation and uncertainty evaluation of the electrical fully digital impedance bridge for the calibration of a capacitance standard against a graphene ACQHR standard developed at INRIM are herewith discussed.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2978921
eng
ispartofbook:Conference on Precision Electromagnetic Measurements
2022 Conference on Precision Electromagnetic Measurements
firstpage:1
lastpage:2
numberofpages:2
info:eu-repo/semantics/closedAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29790202024-03-09T04:42:19Zcom_11583_2614429com_11583_2614425col_11583_2614405
2D finite elements for the computational analysis of crack propagation in brittle materials and the handling of double discontinuities
Fichera, Sebastiano
Biondi, Bruno
Ventura, Giulio
Fichera, Sebastiano
Biondi, Bruno
Ventura, Giulio
Extended Finite Element Method
Discontinuities
Equivalent Polynomials
Crack growth simulations by way of the traditional Finite Element Method claim progressive remeshing to fit the geometry of the fracture, severely increasing the computational effort. Methods such as the eXtended Finite Element Method (XFEM) allow to overcome this limitation by means of nodal shape functions multiplied by Heaviside step function to enrich finite element nodes. Through the medium of a discontinuous field, the entire geometry of the discontinuity can be modelled regardless of
the mesh, avoiding remeshing. In this paper two shell-type XFEM elements (a three-node triangular element and a four-node quadrangular element) to evaluate crack propagation in brittle materials are presented. These elements have been implemented into the widespread opensource framework OpenSees to evaluate crack propagation into a plane shell subjected to monotonically increasing loads. Moreover, in the perspective of fracture propagation simulations, the problem of managing multiple cracks without remeshing or operating subdivisions on the integration domain has been investigated and a four-node quadrangular finite element
for the computational analysis of double crossed discontinuities by the means of equivalent polynomials is presented in this paper.
Equivalent polynomials allow to overcome inaccuracies on the results when performing standard numerical integration (e.g. Gauss-Legendre quadrature rule) over the entire domain of XFEM elements, without the need of defining integration subdomains. The presented work and the computational strategy behind it may be extremely useful not only in the field of fracture mechanics, but also to solve complex geometry problems or material discontinuities.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2979020
10.1016/j.prostr.2022.12.164
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85159010171
https://www.sciencedirect.com/science/article/pii/S2452321622007211
eng
ispartofbook:23 European Conference on Fracture
23 European Conference on Fracture – ECF23
volume:42
firstpage:1291
lastpage:1298
numberofpages:8
journal:PROCEDIA STRUCTURAL INTEGRITY
info:eu-repo/semantics/openAccess
ELETTRONICO
Elsevier
country:NLD
place:Amsterdam
oai:iris.polito.it:11583/29747232024-03-17T02:02:57Zcom_11583_2614429com_11583_2614425col_11583_2614405
CALCOLO DELL’USURA IN CAMPO FERROVIARIO: CONFRONTO TRA APPROCCI GLOBALI E LOCALI
Bosso, Nicola
Magelli,Matteo
Zampieri, N
Bosso, Nicola
Magelli, Matteo
Zampieri, N
A causa delle elevate forze di contatto e degli scorrimenti all’interfaccia ruota-rotaia, le ruote ferroviarie sono soggette ad usura. La disponibilità di codici in grado di calcolare l’usura delle ruote è un supporto fondamentale alla manutenzione predittiva delle ruote ma anche alla fase di progetto del veicolo. Tipicamente, il materiale asportato viene calcolato introducendo leggi di usura empiriche, che possono essere applicate con approccio globale o locale. Nel primo caso, il materiale asportato viene complessivamente calcolato a partire dalle forze e dagli scorrimenti sull’area di contatto, ed è necessario ipotizzare a priori la distribuzione del materiale asportato lungo il profilo. Al contrario, con approccio locale, l’usura viene calcolata in ogni punto dell’area di contatto a partire dalle distribuzioni di pressione di contatto e velocità di scorrimento. La seguente memoria mira a confrontare le differenze tra gli approcci globale e locale nel calcolo dell’usura delle ruote ferroviarie.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2974723
ita
ispartofbook:51° Convegno AIAS
51° Convegno AIAS
info:eu-repo/semantics/closedAccess
ELETTRONICO
Università degli Studi di Padova
oai:iris.polito.it:11583/29812952024-03-21T22:50:36Zcom_11583_2614429com_11583_2614425col_11583_2614405
Characterisation of Residual Stresses of Rheocast Al Alloy
Elisa Fracchia
Ivano Gattelli
Marco Actis Grande
Fracchia, Elisa
Gattelli, Ivano
ACTIS GRANDE, Marco
Rheocasting
Residual Stresse
Heat Treatment
Rheocasting is a semisolid casting process allowing toobtain near-net shapeparts. Through the Rheocasting process, itis possible to achievealuminium castings havinga lowgrade of porosity if compared to traditional die-casting methods, encouraging the production of automotive frame parts. However, casting processes, as commonly known, may cause tensile residual stresses inside the parts. Onthe other hand, compressive stresses inside castings can significantly increase the life of components: residual compressive stresses increase the material's resistance by counteracting crack initiation and propagation. The cracks propagate when the material is under tensile stress, while the Rheocasting technique seems to promote compressive stresses inside the castings.This work aims to analyse an aluminium rheocasted frame component for race cars in both the as-cast and heat-treated conditions. First,the mechanical properties of the components were evaluatedin terms of tensile tests and microhardness.Then, residual stresses were measured at specific points of the casting.Finally, theevolution of the residual stresses inside the component before and after heat treatment led to assessing the effect of the Rheocasting process condition andthe heat treatment, proving the marked advantage of using such a technology.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2981295
10.4028/p-cQ6PQs
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85170553010
https://www.scientific.net/SSP.347.31
eng
ispartofbook:Semi-solid casting of structural materials
The 17th International Conference on Semi Solid Processing of Alloys & Composites
volume:347
firstpage:31
lastpage:37
numberofpages:7
serie:SOLID STATE PHENOMENA
info:eu-repo/semantics/closedAccess
ELETTRONICO
Trans Tech Publications
country:CHE
place:Bäch
oai:iris.polito.it:11583/29771482024-03-16T03:16:39Zcom_11583_2614429com_11583_2614425col_11583_2614405
On the role of the flow permeability of metal foams on trailing edge noise reduction
Rubio Carpio A.
Avallone F.
Ragni D.
Rubio Carpio, A.
Avallone, F.
Ragni, D.
2018
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2977148
10.2514/6.2018-2964
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85051296611
info:eu-repo/semantics/altIdentifier/isbn/978-1-62410-560-9
ispartofbook:Titolo volume non avvalorato
2018 AIAA/CEAS Aeroacoustics Conference
American Institute of Aeronautics and Astronautics, Inc.
oai:iris.polito.it:11583/29739102024-03-07T06:10:29Zcom_11583_2614429com_11583_2614425col_11583_2614405
Development of a multiscale testing method for the reduction of soft biological tissues waste during mechanical characterization
Lugas, Andrea T.
Serino, Gianpaolo
Terzini, Mara
Bignardi, Cristina
Audenino, Alberto L.
Lugas, Andrea T.
Serino, Gianpaolo
Terzini, Mara
Bignardi, Cristina
Audenino, Alberto L.
2021
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2973910
10.4081/bse.2021.176
ispartofbook:Biomedical Science and Engineering 2021; volume 4(s1):176
Third Centro 3R Annual Meeting - L’era delle 3R: modelli in silico, in vitro e in vivo per promuovere la ricerca traslazionale
volume:4
journal:BIOMEDICAL SCIENCE AND ENGINEERING
PAGEPress
oai:iris.polito.it:11583/29762512024-03-20T18:00:44Zcom_11583_2614429com_11583_2614425col_11583_2614405
Feature Selection for Cost Reduction in MCU Performance Screening
Bellarmino, Nicolo'
Cantoro, Riccardo
Huch, Martin
Kilian, Tobias
Schlichtmann, Ulf
Squillero, Giovanni
Bellarmino, Nicolo'
Cantoro, Riccardo
Huch, Martin
Kilian, Tobia
Schlichtmann, Ulf
Squillero, Giovanni
In safety-critical applications, microcontrollers must satisfy strict quality constraints and performances in terms of Fmax , that is, the maximum operating frequency. It has been demonstrated that data extracted from on-chip ring oscillators, the so-called speed monitors, can model the Fmax of integrated circuits using machine learning models. Those models are suitable for the performance screening process, and they use speed monitors are features, while the target is the Fmax. But if the number of features used for building a machine learning model is huge, the risk of over-fitting or curse of dimensionality is high, leading to a high generalization error. Also, devices with a high number of ring-oscillator are costly to be produced. This paper copes with supervised feature selection in microcontroller performance screening during the early phase of prototyping and presents methodologies to reduce the number of monitors needed to build efficient machine learning models without losing in accuracy. We propose a methodology to rank features according to their importance in the performance prediction, able to extract a subset of them drastically reduced in size, but still able to well solve the underlying task. Experiments showed that the chosen subset of features leads to simpler ML models that can achieve lower prediction error, reducing overfitting. This permits avoiding inserting the full set of sensors in the final product, with a huge saving of money and physical space in the silicon.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2976251
10.1109/LATS58125.2023.10154495
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85164661100
info:eu-repo/semantics/altIdentifier/isbn/979-8-3503-2597-3
https://ieeexplore.ieee.org/document/10154495
info:eu-repo/semantics/altIdentifier/wos/WOS:001017764900017
eng
ispartofbook:24th IEEE Latin-American Test Symposium (LATS)
24th IEEE Latin-American Test Symposium (LATS)
firstpage:1
lastpage:6
numberofpages:6
info:eu-repo/semantics/openAccess
IEEE
oai:iris.polito.it:11583/29741312023-10-12T22:59:11Zcom_11583_2614429com_11583_2614425col_11583_2614405
Integration of Multi-source Data to Infer Effects of Gradual Natural Phenomena on Structures
Erica Lenticchia
Gaetano Miraglia
Rosario Ceravolo
Lenticchia, Erica
Miraglia, Gaetano
Ceravolo, Rosario
First remote sensing
Satellite data
structural health monitoring
Data driven approach
Interferometric data
Architectural heritage
Structural Health Monitoring for a real understanding of the changes taking place and their effects on the structural integrity of the built environment, sometimes it is necessary to move to long observation times. This follows the axioms of SHM, which identify a certain relationship between the frequency and time of observation and the extent (and therefore severity) of ongoing damage. For this reason, in the present paper, interferometric displacement satellite data acquired for a decade on the territory of the city of Rome (Italy) are investigated and correlated to natural phenomena. The paper critically analyzes the possibility of a relationship between these phenomena and satellite data in order to bring out a common pattern. The study of natural and anthropogenic phenomena in the same frequency bandwidth as the interferometric satellite data would therefore be useful for recognizing potential triggering causes of higher frequency phenomena, which could appear as sudden and unstable phenomena if observed with shorter times. In the paper, the authors first make a comparison between natural phenomena and satellite data on a territorial scale and then focus on a series of isolated case studies (single structures and infrastructures).
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2974131
10.1007/978-3-031-07322-9_58
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85134336106
info:eu-repo/semantics/altIdentifier/isbn/978-3-031-07321-2
info:eu-repo/semantics/altIdentifier/isbn/978-3-031-07322-9
info:eu-repo/semantics/altIdentifier/wos/WOS:000871871300058
eng
ispartofbook:Lecture Notes in Civil Engineering
European Workshop on Structural Health Monitoring EWSHM 2022
volume:270
firstpage:572
lastpage:581
numberofpages:10
serie:LECTURE NOTES IN CIVIL ENGINEERING
info:eu-repo/semantics/openAccess
ELETTRONICO
Springer Nature
place:Cham, switzerland
oai:iris.polito.it:11583/29744442024-03-10T07:09:29Zcom_11583_2614429com_11583_2614425col_11583_2614405
A study on the statistical convergence of turbulence simulations around a cylinder
Andrea Ferrero
Francesco Larocca
Massimo Germano
Guglielmo Scovazzi
Ferrero, Andrea
Larocca, Francesco
Germano, Massimo
Scovazzi, Guglielmo
The turbulent flow around a circular cylinder at a Reynolds number equal to 3900 is studied by an implicit Large
Eddy Simulation performed by means of a discontinuous Galerkin finite element solver. The average velocity field in the wake
is evaluated and compared with experimental data from the literature. The focus of the present work is on the estimation of the
statistical uncertainty which is related to the use of a finite time window for the averaging operation. This topic represents an
open problem for both Direct Numerical Simulations and Large Eddy Simulations in which it is difficult to define a priori the size
of the time window which gives statistically converged averaged quantities. Different techniques to estimate this uncertainty are
compared in order to get a quantitative criterion for checking the convergence of statistics. In particular, the Non-Overlapping
Batch Means and the Batch Means Batch Correlations techniques are applied to the present test case.
2020
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2974444
10.1063/5.0026757
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85098010350
info:eu-repo/semantics/altIdentifier/wos/WOS:000636709500241
eng
ispartofbook:{INTERNATIONAL} {CONFERENCE} {OF} {NUMERICAL} {ANALYSIS} {AND} {APPLIED} {MATHEMATICS} {ICNAAM} 2019
{INTERNATIONAL} {CONFERENCE} {OF} {NUMERICAL} {ANALYSIS} {AND} {APPLIED} {MATHEMATICS} {ICNAAM} 2019
volume:2293
firstpage:1
lastpage:4
numberofpages:4
info:eu-repo/semantics/openAccess
ELETTRONICO
AIP
oai:iris.polito.it:11583/29828482024-03-08T14:28:58Zcom_11583_2614429com_11583_2614425col_11583_2614405
LEMMS: Label Estimation of Multi-Feature Movie Segments
Vacchetti Bartolomeo
Dawit Mureja
Cerquitelli Tania
Vacchetti, Bartolomeo
Dawit, Mureja
Cerquitelli, Tania
movie editing
label estimation
clustering
LSTM
In the last few years, there has been an increasing amount of methods and algorithms that approach and automate different video and image editing tasks. A task that so far has not been investigated too much in depth is the analysis of video editing patterns. In this work, we present LEMMS (Label Estimation of Multi-feature Movie Segments), a methodology to analyze and label 30-second long movie editing patterns based on the following editing features: shot size, shot subject, editing pace, and editing trend. LEMMS can identify more or less fine-grained editing classes using a multi-clustering approach. To evaluate the robustness of LEMMS in assigning correct labels the performance of an LSTM classifier is analyzed. For our study, we extracted 24 363 segments of movie scenes from the AVE dataset. The performance of LEMMS in semi-automatic label identification for 30-second long movie segments is accurate, as the proposed approach has an overall accuracy of 92.8% for 50 classes.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2982848
10.1109/ICCVW60793.2023.00325
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85182923466
info:eu-repo/semantics/altIdentifier/isbn/979-8-3503-0744-3
https://ieeexplore.ieee.org/document/10350588
https://cveu.github.io/2023/papers/14.pdf
eng
ispartofbook:2023 IEEE/CVF International Conference on Computer Vision Workshops (ICCVW)
ICCV 2023 Workshop on AI for Creative Video Editing and Understanding
firstpage:3019
lastpage:3027
numberofpages:9
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29708562023-06-29T07:04:56Zcom_11583_2614429com_11583_2614425col_11583_2614405
Information mining of customers preferences for product specifications determination using big sales data
Zhang J.
Lin P.
Simeone A.
Zhang, J.
Lin, P.
Simeone, A.
Big sales data
Customers preference
Density-based clustering
Information entropy
Product design
Product specification
Product competitiveness is highly influenced by its related design specifications. Information retrieval of customers preferences for the specification determination is essential to product design and development. Big sales data is an emerging resource for mining customers preferences on product specifications. In this work, information entropy is used for customers preferences information quantification on product specifications firstly. Then, a method of information mining for customers preferences estimation is developed by using big sales data. On this basis, a density-based clustering analysis is carried out on customers preferences as a decision support tool for the determination and selection of product design specifications. A case study related to electric bicycle specifications determination using big sales data is reported to illustrate and validate the proposed method
2022
info:eu-repo/semantics/conferenceObject
http://hdl.handle.net/11583/2970856
10.1016/j.procir.2022.05.221
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85133507217
https://www.sciencedirect.com/science/article/pii/S2212827122006692
eng
ispartofbook:Procedia CIRP
32nd CIRP Design Conference, CIRP Design 2022
volume:109
firstpage:101
lastpage:106
numberofpages:6
serie:PROCEDIA CIRP
info:eu-repo/semantics/openAccess
ELETTRONICO
Elsevier
oai:iris.polito.it:11583/29809312024-03-06T02:14:56Zcom_11583_2614429com_11583_2614425col_11583_2614405
MERGE: Meta Reinforcement Learning for Tunable RL Agents at the Edge
Sharda Tripathi
Carla Fabiana Chiasserini
Tripathi, Sharda
Chiasserini, Carla Fabiana
Machine learning
O-RAN
disaggregated RAN
Meta-learning
AI-driven air interface
reinforcement learning
resource allocation
ML model compression
virtualised RAN
edge computing
The efficient allocation of radio resources is an essential trait of 5G/6G radio access networks (RANs), as they are called to meet diverse QoS requirements of highly demanding applications. To equip RANs with such an ability and, at the same time, meet their function split constraints, we envision a distributed learning approach for radio resource allocation that makes the most out of the Central Unit (CU) and Distributed Unit (DU) components by effectively exploiting their synergy. On the one hand, our solution, named MERGE, leverages the knowledge of the radio connectivity dynamics that each DU can acquire through the local use of a deep reinforcement learning radio agent. On the other hand, it lets the CU collect such agents in a crowdsourcing fashion, and, then, thanks to a meta-learning policy, properly select and aggregate them to create up-to-date radio agents of the right size (hence, complexity level) to fit the computing constraints of the individual DUs. Our results show that MERGE can match the performance of the highest- complexity radio model with 25% less computational require- ments, and, for a given computational resource, it outperforms a single pruned model with a 19% increase in QoS.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2980931
eng
ispartofbook:IEEE GLOBECOM 2023
IEEE GLOBECOM 2023
numberofpages:6
info:eu-repo/semantics/closedAccess
IEEE
oai:iris.polito.it:11583/29708892023-06-29T07:05:00Zcom_11583_2614429com_11583_2614425col_11583_2614405
Modelling and techno-economic analysis of Peer-to-Peer electricity trading systems in the context of Energy Communities
Schiera, Daniele Salvatore
De Vizia, Claudia
Zarri, Andrea
Borchiellini, Romano
Lanzini, Andrea
Patti, Edoardo
Bottaccioli, Lorenzo
Schiera, Daniele Salvatore
De Vizia, Claudia
Zarri, Andrea
Borchiellini, Romano
Lanzini, Andrea
Patti, Edoardo
Bottaccioli, Lorenzo
Peer-to-Peer trading system
Optimisation
Energy Community
The increasing penetration of Renewable Energy Resources (RES) is an opportunity to empower citizens to actively participate in energy markets through energy communities. At the local level, the Peer-to-Peer (P2P) trade and exchange of renewable energy represents a valid solution to fulfil the energy demand of the members, increase self-consumption and obtain economic benefits. However, a proper evaluation of the benefits for the community would require new considerations in designing typologies, composition, sharing and pricing mechanisms. Based on these premises, this paper explores the possible influences of different community-based P2P trading systems by examining several categories, ranging from aggregation structures, market mechanisms, sharing policies and pricing mechanisms internal to the local market. Furthermore, a flexible Mixed Integer Linear Programming model was formulated to optimise the day-ahead scheduling of community members participating in the P2P energy market. In this way, different community types, sharing policies, and pricing mechanisms were tested. Finally, the optimisation results were evaluated based on several key parameters.
2022
info:eu-repo/semantics/conferenceObject
http://hdl.handle.net/11583/2970889
10.1109/EEEIC/ICPSEurope54979.2022.9854537
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85137985883
info:eu-repo/semantics/altIdentifier/isbn/978-1-6654-8537-1
https://ieeexplore.ieee.org/document/9854537
info:eu-repo/semantics/altIdentifier/wos/WOS:000861373200020
eng
ispartofbook:Proceedings of 2022 IEEE International Conference on Environment and Electrical Engineering and 2022 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)
2022 IEEE International Conference on Environment and Electrical Engineering and 2022 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)
firstpage:1
lastpage:6
numberofpages:6
info:eu-repo/semantics/openAccess
IEEE
oai:iris.polito.it:11583/29771342024-03-16T03:16:38Zcom_11583_2614429com_11583_2614425col_11583_2614405
On the effect of the tip clearance on the aerodynamic and aeroacoustics of a diffuser-augmented wind turbine
Avallone F.
Casalino D.
Ragni D.
Avallone, F.
Casalino, D.
Ragni, D.
2019
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2977134
10.2514/6.2019-1294
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85083944854
info:eu-repo/semantics/altIdentifier/isbn/978-1-62410-578-4
ispartofbook:Titolo volume non avvalorato
AIAA Scitech 2019 Forum
American Institute of Aeronautics and Astronautics, Inc.
oai:iris.polito.it:11583/29762142024-03-10T07:06:43Zcom_11583_2614429com_11583_2614425col_11583_2614405
Wave energy converters technology database for a web-based platform for evaluating wave energy resource and productivity potential
Giorgi G.
Novo R.
Cervelli G.
Bracco G.
Giorgi, G.
Novo, R.
Cervelli, G.
Bracco, G.
Energy security, Websites, Wave energy conversion
Wave energy is gaining increasing attention in worldwide energy planning strategies as key enabling factor for reaching the ambitious carbon neutrality targets. Therefore, a seamless access to the energy resource is needed, as well as the productivity of various wave energy converters, to probe the potential of installing farms in a given location. This paper presents and uses the novel web-based MORE-EST Platform (Marine Offshore Renewable Energy – Energy Security Transition), which aggregates information for wave resource assessment, bathymetry and marine space use. This work includes the mathematical modelling of the underlying technology database: 1) an Oscillating Surge Wave Energy Converter, to discuss the importance of including directionality in productivity assessment; 2) a Heaving Point Absorber and its techno-economic optimisation, comparing various proxies for capital expenditures. Results demonstrate that: 1) neglecting directionality may lead to errors in the productivity estimation, up to 31% in a site with a narrow wave rose, and up to 46% in a site with a widespread wave rose; 2) different optimisation objectives lead to dramatically different devices.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2976214
10.1201/9781003360773-5
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85145586143
info:eu-repo/semantics/altIdentifier/isbn/9781003360773
eng
ispartofbook:Trends in Renewable Energies Offshore
RENEW
firstpage:33
lastpage:41
numberofpages:9
info:eu-repo/semantics/closedAccess
ELETTRONICO
CRC Press
oai:iris.polito.it:11583/29851532024-03-19T03:30:04Zcom_11583_2614429com_11583_2614425col_11583_2614405
Impact of Current Collecting Grids on the Scalability of 3-Terminal Perovskite/Silicon Tandems with Bipolar Transistor Architecture
Giliberti, Gemma
Cappelluti, Federica
Giliberti, Gemma
Cappelluti, Federica
perovskite-silicon tandem solar cell
three-terminal
power lo
physics-based simulation
circuit-level simulation.
The heterojunction bipolar transistor (HBT) structure is an attractive solution for developing three-terminal perovskite/silicon tandem solar cells compatible with dominant
silicon photovoltaic devices, such as PERC and heterojunction.
However, in contrast to three-terminal tandems based on interdigitated back contact silicon cells, the three-terminal HBT requires the implementation of the third contact at the base (middle) layer. To this aim, the simplest solution is to access the base layer from the cell front side by implementing a grid layout with top interdigitated contacts (TIC). In this work, we elaborate on the feasibility of the HBT structure for 3T perovskite/silicon tandem solar cells. We report, based on optical and drift-diffusion simulations, proof-of-concept designs with high efficiency potential, and we analyze, with the aid of circuit
level simulations, the implications of a TIC grid layout in the perspective of scaling up to large areas. Our results show that the HBT architecture is a promising candidate for developing 3T perovskite/silicon tandem solar cells compatible with industry
standard silicon photovoltaics.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2985153
10.1109/PVSC48320.2023.10360071
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85182782557
info:eu-repo/semantics/altIdentifier/isbn/978-1-6654-6059-0
https://ieeexplore.ieee.org/abstract/document/10360071
info:eu-repo/semantics/altIdentifier/wos/WOS:001151676200547
eng
ispartofbook:Photovoltaic Specialists Conference
IEEE 50th Photovoltaic Specialists Conference (PVSC)
firstpage:1
lastpage:3
numberofpages:3
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
country:USA
oai:iris.polito.it:11583/29824442023-10-04T23:13:36Zcom_11583_2614429com_11583_2614425col_11583_2614405
Trials Supported By Smart Networks Beyond 5G: the TrialsNet Approach
Aruna Prem Bianzino
Andrea Basso
Giancarlo Caratti
Ciprian Comsa
Andrea Di Giglio
Carolina Garcia
Andreas Georgakopoulos
Paolo Giaccone
Eleni Giannopoulou
Marco Gramaglia
Paola Iovanna
Gianna Karanassiou
Marco Laurino
Johann M. Marquez-Barja
Elisa Maiettini
Miguel A. Martinez-Lopez
Maurizio Munafo
Lorenzo Natale
Hassan Osman
Niki Pantazi
Nikos Papagiannopoulos
Lorenzo Pessotto
Cristian Petrache
Silvia Provvedi
Gabriele Scivoletto
Alessandro Trogolo
Albert Vidal
Prem Bianzino, Aruna
Basso, Andrea
Caratti, Giancarlo
Comsa, Ciprian
Di Giglio, Andrea
Garcia, Carolina
Georgakopoulos, Andrea
Giaccone, Paolo
Giannopoulou, Eleni
Gramaglia, Marco
Iovanna, Paola
Karanassiou, Gianna
Laurino, Marco
Marquez-Barja, Johann M.
Maiettini, Elisa
Martinez-Lopez, Miguel A.
Munafo, Maurizio
Natale, Lorenzo
Osman, Hassan
Pantazi, Niki
Papagiannopoulos, Niko
Pessotto, Lorenzo
Petrache, Cristian
Provvedi, Silvia
Scivoletto, Gabriele
Trogolo, Alessandro
Vidal, Albert
6G
Use Case
Large Scale Trials
TrialsNet is a project focused on improving European urban ecosystems through 13 innovative use cases in the three representative domains of Infrastructure, Transportation, Security and Safety; eHealth and Emergency; and Culture, Tourism, and Entertainment. These use cases will be implemented across different clusters in Italy, Spain, Greece, and Romania, involving real users. This paper provides an overview of the various use cases that will be trialled in different contexts through the platform and network solutions that will be deployed by the project based on advanced functionalities such as dynamic slicing management, NFV, MEC, AI/ML, and others. To this end, TrialsNet will develop assessment frameworks to measure the impact of use cases on a technical, socio-economic, and societal level through the definition and measurement of proper Key Performance Indicators (KPIs) and Key Value Indicators (KVIs). The project seeks to identify network limitations, optimize infrastructure, and define new requirements for next-generation mobile networks. Ultimately, TrialsNet aims to enhance livability in urban environments by driving advancements in various domains.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2982444
eng
ispartofbook:Symposium on Vision and Facts on 6G and Future Networks in Europe
2023 IEEE Future Networks World Forum (FNWF)
numberofpages:7
info:eu-repo/semantics/closedAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29851892024-03-08T14:21:12Zcom_11583_2614429com_11583_2614425col_11583_2614405
European Flexible Heat Shields: Advanced TPS Design and Tests for Future In-Orbit Demonstration - 2
Giuseppe GUIDOTTI
Alessandro PRINCI
Jaime GUTIERREZ-BRICENO
Federico TROVARELLI
Giuseppe GOVERNALE
Nicole VIOLA
Ingrid DIETLEIN
Steffen CALLSEN
Kevin BERGMANN
Junnai ZHAI
Thomas GAWEHN
Roberto GARDI
Barbara TISEO
Ysolde PREVEREAUD
Yann DAUVOIS
Giovanni GAMBACCIANI
Giada DAMMACCO
Guidotti, Giuseppe
Princi, Alessandro
GUTIERREZ-BRICENO, Jaime
Trovarelli, Federico
Governale, Giuseppe
Viola, Nicole
Dietlein, Ingrid
Callsen, Steffen
Bergmann, Kevin
Zhai, Junnai
Gawehn, Thoma
Gardi, Roberto
Tiseo, Barbara
Prevereaud, Ysolde
Dauvois, Yann
Gambacciani, Giovanni
Dammacco, Giada
EFESTO-2 is an EU-funded project under Horizon Europe that aims to enhance European expertise in Inflatable Heat Shields (IHS). Building on the achievements of the previous EFESTO project (H2020 funds No 821801), EFESTO-2 focuses on advancing key IHS technologies to increase their Technology Readiness Level (TRL). The project pillars include analyzing the business case for IHS applications, exploring additional aspects of IHS, improving tools and models, and establishing a development roadmap for IHS systems. This paper outlines the project objectives and plan, highlighting ongoing and future activities for the next two years, positioning it within the European re-entry technology roadmap. Funding was provided by the European Union's Horizon Europe program (grant agreement No 1010811041).
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2985189
10.13009/eucass2023-765
https://www.eucass.eu/component/docindexer/?task=download&id=7084
eng
ispartofbook:Titolo volume non avvalorato
Aerospace Europe Conference 2023 – 10TH EUCASS – 9TH CEAS
numberofpages:14
info:eu-repo/semantics/openAccess
EUCASS
oai:iris.polito.it:11583/29790412024-03-06T01:41:01Zcom_11583_2614429com_11583_2614425col_11583_2614405
Hidroelectricidad y europeización. Actualizar el valor cultural de las infraestructuras para construir una nueva alianza estratégica con personas y paisajes.
Mattone, Manuela
Vigliocco, Elena
Mattone, Manuela
Vigliocco, Elena
Hydropower
Europeanization
landscape
tourism
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2979041
http://gipai.aq.upm.es/wp-content/uploads/2023/04/Actas-IX_TensiÃ3n-sostenible_.pdf
spa
ispartofbook:Tension Sostenible. El patrimonio en la Transiciòn Energética
Tension Sostenible. El patrimonio en la Transiciòn Energética
volume:9
firstpage:53
lastpage:71
numberofpages:19
serie:SEMINARIO SOBRE PATRIMONIO ARQUITECTÓNICO E INDUSTRIAL
info:eu-repo/semantics/openAccess
ELETTRONICO
Universidad Politecnica Madrid
country:ESP
place:Madrid
oai:iris.polito.it:11583/29851492024-03-11T17:40:40Zcom_11583_2614429com_11583_2614425col_11583_2614405
Study of U-shaped sloshing tanks to tune Wave Energy Converters through high-fidelity CFD simulations as geometry changes
Fontana, Marco
Sirigu, Sergej A.
Bonfanti, Mauro
Fontana, Marco
Sirigu, Sergej A.
Bonfanti, Mauro
Performance evaluation
Geometry
Torque
Mechatronics
Bandwidth
Predictive models
Reservoirs
Wave Energy
Sloshing Tank
CFD
This paper investigates the dynamics of aU-shaped sloshing tank varying its geometrical properties. The U - tank is designed to be coupled and integrated within a floating Wave Energy Converter, generating a second peak in its dynamic and allowing a bandwidth widening or a response amplification. The geometrical and liquid-filling properties directly affect the dynamics according to analytic models until second-order effects arise, such as secondary sloshing in the free-surface place, for in-stance, due to broader reservoirs or the elbows becoming sharper for manufacturing purposes. In light of the above considerations, a high-fidelity simulation is performed to overcome all those effects that are not considered in the simplified models. The results show a performance decrease when the reservoirs become more extensive and the elbow sharper.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2985149
10.1109/ICECCME55909.2022.9988167
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85146439343
info:eu-repo/semantics/altIdentifier/isbn/978-1-6654-7095-7
https://ieeexplore.ieee.org/document/9988167/keywords#keywords
eng
ispartofbook:2022 International Conference on Electrical, Computer, Communications and Mechatronics Engineering (ICECCME)
2022 International Conference on Electrical, Computer, Communications and Mechatronics Engineering (ICECCME)
firstpage:1
lastpage:6
numberofpages:6
info:eu-repo/semantics/closedAccess
IEEE
oai:iris.polito.it:11583/29702372024-03-11T22:21:24Zcom_11583_2614429com_11583_2614425col_11583_2614405
Raman spectroscopic characterization of corrosion products of archaeological iron
A Vietti
E Angelini
S Grassini
N Donato
Vietti, A
Angelini, E
Grassini, S
Donato, N
Raman spectroscopy is a versatile analytical technique which allows the detection of different molecules analysing the vibrational modes. As a matter of facts, the vibrational frequencies are typical of a specific chemical bond or of a structural symmetry. In this study, the Raman technique is used for the determination of iron corrosion products, mainly oxides and hydroxides. Metallic artefacts buried in soil are affected, in dependence of their electrochemical nobility, by corrosion phenomena of various entities, which partially modify their chemical composition and their structure. The process may occur both during burial time and after the extraction from the archaeological site, implying the potential loss of information about the metallurgical technology and structure of the object. The study of the corrosion phenomena allows to propose tailored strategies for the restoration and conservation of the artefacts, especially in view of the storage of the artefacts in a museum. This study validates the use of the Raman technique for this purpose, showing its efficiency in the identification of the iron corrosion products in favourable conditions for the analysis of Cultural Heritage artefacts, as the possibility of performing in situ analysis without the need of a previous sample preparation.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2970237
10.1088/1742-6596/2204/1/012066
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85129903950
https://iopscience.iop.org/article/10.1088/1742-6596/2204/1/012066
eng
ispartofbook:International Conference on Metrology for Archaeology and Cultural Heritage
International Conference on Metrology for Archaeology and Cultural Heritage (MetroArchaeo)
volume:2204
firstpage:012066
numberofpages:6
journal:JOURNAL OF PHYSICS. CONFERENCE SERIES
info:eu-repo/semantics/openAccess
IOP publishing
oai:iris.polito.it:11583/29744322024-03-15T18:46:07Zcom_11583_2614429com_11583_2614425col_11583_2614405
Mixed Proper Orthogonal Decomposition with Harmonic Approximation for Parameterized Order Reduction of Electromagnetic Models
Torchio, Riccardo
Zanco, Alessandro
Lucchini, Francesco
Alotto, Piergiorgio
Grivet-Talocia, Stefano
Torchio, Riccardo
Zanco, Alessandro
Lucchini, Francesco
Alotto, Piergiorgio
Grivet-Talocia, Stefano
Proper Orthogonal Decomposition (POD)
parameterized model-order reduction (PMOR)
parametric geometry
integral equations
This paper presents some preliminary investigations on a hybrid Model Order Reduction approach for parameter-dependent electromagnetic systems. Starting from an integral equation formulation of the field problem, we introduce a first level of compression based on the well-established Proper Orthogonal Decomposition (POD). The result is a small-scale approximation of the full-order discrete field formulation, which retains an explicit dependence on the set of free parameters defining the geometry. The evaluation of the reduced model for arbitrary parameter configurations remains very expensive, as it requires the construction of the full system equations before its projection onto a lower-dimensional space. This problem is solved by constructing a surrogate macromodel of the parameterized reduced-order system through a multivariate Fourier approximation. Numerical results applied to a moving coil over a finite ground plane show model compression above 99% while preserving accuracy on currents and fields within 1%.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2974432
10.1109/EMCEurope51680.2022.9901091
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85140217357
info:eu-repo/semantics/altIdentifier/isbn/978-1-6654-0788-5
https://ieeexplore.ieee.org/document/9901091
info:eu-repo/semantics/altIdentifier/wos/WOS:000885912100065
eng
ispartofbook:2022 International Symposium on Electromagnetic Compatibility – EMC Europe
2022 International Symposium on Electromagnetic Compatibility – EMC Europe
firstpage:349
lastpage:354
numberofpages:6
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29805622023-10-20T22:52:50Zcom_11583_2614429com_11583_2614425col_11583_2614405
Alternating direction method of multipliers for polynomial optimization
V Cerone
S Fosson
S Pirrera
D Regruto
Cerone, V
Fosson, S
Pirrera, S
Regruto, D
Optimization
Convergence
Polynomial Optimization
ADMM
Multivariate polynomial optimization is a prevalent model for a number of engineering problems. From a mathematical viewpoint, polynomial optimization is challenging because it is non-convex. The Lasserre’s theory, based on semidefinite relaxations, provides an effective tool to overcome this issue and to achieve the global optimum. However, this approach can be computationally complex for medium and large scale problems. For this motivation, in this work, we investigate a local minimization approach, based on the alternating direction method of multipliers, which is low-complex, straightforward to implement, and prone to decentralization. The core of the work is the development of the algorithm tailored to polynomial optimization, along with the proof of its convergence. Through a numerical example we show a practical implementation and test the effectiveness of the proposed algorithm with respect to state-of-the-art methodologies.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2980562
10.23919/ECC57647.2023.10178190
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85166487275
info:eu-repo/semantics/altIdentifier/isbn/978-3-907144-08-4
https://ieeexplore.ieee.org/abstract/document/10178190
info:eu-repo/semantics/altIdentifier/wos/WOS:001035589000075
eng
ispartofbook:2023 European Control Conference (ECC)
2023 European Control Conference (ECC)
firstpage:1
lastpage:6
numberofpages:6
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29768162024-01-10T02:30:42Zcom_11583_2614429com_11583_2614425col_11583_2614405
Analytical Benchmark Problems for Multifidelity Optimization Methods
Mainini, Laura
Serani, Andrea
Ficini, Simone
Pellegrini, Riccardo
Diez, Matteo
Rumpfkeil, Markus P.
Minisci, Edmondo
Quagliarella, Domenico
Pehlivan Solak, Hayriye
Yildiz, Sıhmehmet
Nikbay, Melike
Di Fiore, Francesco
Bryson, Dean
Beran, Philip S.
Mainini, Laura
Serani, Andrea
Ficini, Simone
Pellegrini, Riccardo
Diez, Matteo
Rumpfkeil, Markus P.
Minisci, Edmondo
Quagliarella, Domenico
Pehlivan Solak, Hayriye
Yildiz, Sıhmehmet
Nikbay, Melike
Di Fiore, Francesco
Bryson, Dean
Beran, Philip S.
Benchmark, Multifidelity Optimization
The paper presents a collection of analytical benchmark problems specifically selected to provide a set of stress tests for the assessment of multifidelity optimization methods. In addition, the paper discusses a comprehensive ensemble of metrics and criteria recommended for the rigorous and meaningful assessment of the performance of multifidelity strategies and algorithms.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2976816
info:eu-repo/semantics/altIdentifier/isbn/978-92-837-2438-4
https://www.sto.nato.int/publications/STO Meeting Proceedings/Forms/Meeting Proceedings Document Set/docsethomepage.aspx?ID=45504&FolderCTID=0x0120D5200078F9E87043356C409A0D30823AFA16F602008CF184CAB7588E468F5E9FA364E05BA5&List=7e2cc123-6186-4c30-8082-1ba072228ca7&RootFolder=/publications/STO Meeting Proceedings/STO-MP-AVT-354
eng
ispartofbook:STO-MP-AVT-354 Multi-Fidelity Methods for Military Vehicle Design
NATO STO-AVT-RWS-354 Multi-Fidelity Methods for Military Vehicle Design
volume:STO-MP-AVT-354
numberofpages:16
info:eu-repo/semantics/closedAccess
ELETTRONICO
NATO STO
oai:iris.polito.it:11583/29720842024-03-19T22:49:21Zcom_11583_2614429com_11583_2614425col_11583_2614405
From depth-averaging to fully three-dimensional modelling of debris-flow dynamics
M. Pirulli
A. Leonardi
M. Manassero
C. Scavia
Pirulli, M.
Leonardi, A.
Manassero, M.
Scavia, C.
debris flow
numerical modelling
continuum mechanic
back analysis
Two numerical codes, with fundamental differences in their approaches, are used for modeling the Yu Tung debris flow, which occurred in Hong Kong in 2008. The first code, RASH3D, is based depthaveraged St. Venant equations, solved in an Eulerian framework. The second code, HYBIRD, is fully 3D and based on Lattice-Boltzmann Model (LBM), i.e. the conservation equations are not depth-averaged and therefore multiple velocity measures are available over the depth. The two model output are compared and discussed.
2019
info:eu-repo/semantics/conferenceObject
http://hdl.handle.net/11583/2972084
10.32075/17ECSMGE-2019-1084
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85178655923
info:eu-repo/semantics/altIdentifier/isbn/978-9935-9436-1-3
https://www.issmge.org/uploads/publications/51/75/1084-ecsmge-2019_Pirulli.pdf
eng
ispartofbook:Geotechnical Engineering foundation of the future: proceedings of the XVII ECSMGE
17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019
firstpage:1
lastpage:7
numberofpages:7
info:eu-repo/semantics/openAccess
ELETTRONICO
ISSMGE
oai:iris.polito.it:11583/29742972023-06-29T07:05:27Zcom_11583_2614429com_11583_2614425col_11583_2614405
Reliability Assessment Methodologies for ANN-based Systems
Ruospo A.
Ruospo, A.
Deep Learning
Fault Injection
Reliability
Test
In recent decades, deep learning (DL)-based solutions have gained a great deal of interest in industry and academia due to their outstanding computational capabilities. The usage of electronic devices running applications based on Artificial Neural Networks (ANNs) is spreading in several areas, including safety-critical applications such as self-driving cars, robots, and space applications. ANNs are often regarded as inherently robust and fault-tolerant, being brain-inspired and redundant computing models. However, to use them safely in human contexts, there is a compelling need to assess their reliability. Indeed, when they are deployed on resource-constrained hardware devices, single physical faults might jeopardize the activity of multiple neurons, leading to undesirable results. Since reliability assessment is becoming a growing concern, many efforts have been made in recent decades to propose efficient approaches to assess ANN-based systems reliability. The intent of this article is to overview the main reliability assessment methodologies for ANN-based systems, focusing mainly on Fault Injection techniques used to evaluate the ANN resilience at different abstraction levels.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2974297
10.1109/LATS57337.2022.9936917
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85142781653
info:eu-repo/semantics/altIdentifier/isbn/978-1-6654-5707-1
https://ieeexplore.ieee.org/document/9936917
info:eu-repo/semantics/altIdentifier/wos/WOS:000903702200004
eng
ispartofbook:2022 IEEE 23rd Latin American Test Symposium, LATS 2022
23rd IEEE Latin American Test Symposium, LATS 2022
firstpage:1
lastpage:4
numberofpages:4
info:eu-repo/semantics/closedAccess
Institute of Electrical and Electronics Engineers Inc.
oai:iris.polito.it:11583/29738772023-06-29T07:05:28Zcom_11583_2614429com_11583_2614425col_11583_2614405
An OSGi-based production process monitoring system for SMEs
Bonci, Andrea
Di Biase, Alessandro
Giannini, Maria Cristina
Indri, Marina
Monteriu, Andrea
Prist, Mariorosario
Bonci, Andrea
Di Biase, Alessandro
Giannini, Maria Cristina
Indri, Marina
Monteriu, Andrea
Prist, Mariorosario
Monitoring System
OSGi
Cyber Physical system
IIoT
Industry 4.0
Mobile Robotics
The present paper proposes an architecture for a product process monitoring system suitable for SMEs (Small-Medium Enterprises). The monitoring system is the main means by which decision-making systems based on intelligent automation technologies are aware of the state of the system on which they will take decisions. Methods and tools from best-practice and best-effort approaches are proposed in the context of SMEs, where the requirements of low cost, low initial level of digitisation and high production flexibility often coexist and contribute to the complexity of management and control problems in these companies. The paper focuses on the design of the monitoring system using an OSGi framework to meet industry standards and Industry 4.0 requirements, taking into account the peculiarities of SMEs as design constraints. The proposed architecture was
first tested using a simulation tool and then implemented on a full-scale production line used for data collection.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2973877
10.1109/IECON49645.2022.9968742
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85143911586
info:eu-repo/semantics/altIdentifier/isbn/978-1-6654-8025-3
https://ieeexplore.ieee.org/document/9968742
eng
ispartofbook:IECON 2022 – 48th Annual Conference of the IEEE Industrial Electronics Society
IECON 2022 – 48th Annual Conference of the IEEE Industrial Electronics Society
numberofpages:6
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29709002023-06-29T07:05:23Zcom_11583_2614429com_11583_2614425col_11583_2614405
Content Sharing in Pedestrian-based Micro Clouds
Rapelli, Marco
Pannu, Gurjashan Singh
Dressler, Falko
Casetti, Claudio
Rapelli, Marco
Pannu, Gurjashan Singh
Dressler, Falko
Casetti, Claudio
The continuous growth of the urban population and the high development and maintenance costs of infrastructure-based approaches make it necessary the utilization of distributed schemes. Among distributed systems, there is an increasing interest in edge cloud models, both for vehicular and pedestrian applications. In this paper, we developed a distributed application based on the micro cloud concept formulated in the field of vehicular edge computing for spreading content items in an indoor pedestrian environment. Results highlight how it is possible to reach both 100% content items spread and up to 66% reduction over channel collisions.
2022
info:eu-repo/semantics/conferenceObject
http://hdl.handle.net/11583/2970900
10.1109/VTC2022-Spring54318.2022.9861008
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85137797579
info:eu-repo/semantics/altIdentifier/isbn/978-1-6654-8243-1
https://ieeexplore.ieee.org/document/9861008
info:eu-repo/semantics/altIdentifier/wos/WOS:000861825803050
eng
ispartofbook:2022 IEEE 95th Vehicular Technology Conference
IEEE VTC 2022 Spring
firstpage:1
lastpage:6
numberofpages:6
info:eu-repo/semantics/closedAccess
IEEE
oai:iris.polito.it:11583/29823222024-03-13T09:35:28Zcom_11583_2614429com_11583_2614425col_11583_2614405
Platoon-Local Dynamic Map: Micro cloud support for platooning cooperative perception
Carlos Mateo Risma Carletti
Claudio Casetti
Jérôme Härri
Fulvio Risso
RISMA CARLETTI, CARLOS MATEO
Casetti, Claudio
Härri, Jérôme
Risso, Fulvio
V2X
Autonomous Vehicle
Platooning
Vehicular Micro Cloud
Local Dynamic Map
LDM
ITS
Vehicular Network
5G
Platooning is a popular vehicular application for autonomous driving on which the Platoon Leader (PL) manages all maneuvers using context information from Vehicle-to-Vehicle (V2V) messages. However, redundant context information from nearby vehicles in the platoon can increase computational costs for the PL. To solve this issue, vehicular micro-clouds can be formed to enable collective data processing and aggregation, thus reducing the PL's perception workload. The proposed solution, called Platoon Local Dynamic Map (P-LDM), creates a single database of context information, distributing the data aggregation load among all members of the platoon. Simulation results evaluate the effectiveness of the proposed solution and compare it to typical Cooperative Perception mechanisms.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2982322
10.1109/WiMob58348.2023.10187883
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85167595220
info:eu-repo/semantics/altIdentifier/isbn/979-8-3503-3667-2
https://ieeexplore.ieee.org/document/10187883
info:eu-repo/semantics/altIdentifier/wos/WOS:001042200300066
eng
ispartofbook:2023 19th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)
VN4RRSR’23: International Workshop on Vehicular Networks for Risk Reduction and Safety Related Systems
firstpage:405
lastpage:410
numberofpages:6
info:eu-repo/semantics/openAccess
IEEE
country:USA
place:New York, NY
oai:iris.polito.it:11583/29784832024-03-14T01:38:09Zcom_11583_2614429com_11583_2614425col_11583_2614405
Patrimonio architettonico religioso di ordini e congregazioni in Valle di Susa nel XXI secolo: uso sociale e ruolo delle committenze nei processi di trasformazione, restauro e valorizzazione
Novelli Francesco
Novelli, Francesco
Valle di Susa
Abbazia di Novalesa
patrimonio architettonico religioso
restauro
uso sociale
The historical importance of the Valsusina area derives from the constant confrontation between the settlements and the crossings; in fact, the Valley has always been one of the main routes across the Alps, starting from prehistoric times, and its history continues with the remains of the Roman era and with the medieval Via Francigena. The widespread presence in the territory of abbeys, the Prevostura of Oulx, the Cathedral in Susa, and the Carthusian monasteries, is the direct consequence of the frequentation of the pilgrims on the roads that led to the passes. Medieval churches are the most significant presence of the anthropization of the territory after the year 1000 and, together with a capillary monastic presence, characterize the religious settlements of the Valley. The Susa Valley has been affected in the last 40 years by significant transformations that have changed its environment and heritage, particularly the religious one. Orders and congregations have often shown themselves to be prudent commissions capable of interpreting and managing changes in the governance of their properties about a growing and widespread decline in vocations, the cause of undoubted difficulties in guaranteeing proper maintenance and conservation of assets entrusted to them.
The proposed contribution intends to reflect on the modalities of transformation and compatibility of use of this heritage through the case study of the Abbey of Novalesa, highlighting the role of the religious commission and underlining how the activation of best practices in the conservation and enhancement processes, also with an objective aimed at social inclusion, is the result of a shared and synergistic action between the main stakeholders operating in the territory, the local authorities, and the clients.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2978483
info:eu-repo/semantics/altIdentifier/isbn/978-88-9377-267-9
https://www.editricesapienza.it/book/8431
ita
ispartofbook:Rappresentazione, Architettura e Storia. La diffusione degli ordini religiosi nei paesi del Mediterraneo tra Medioevo ed Età Moderna. Atti del Convegno Internazionale 10-11 maggio 2021
Rappresentazione, Architettura e Storia. La diffusione degli ordini religiosi nei paesi del Mediterraneo tra Medioevo ed Età Moderna
firstpage:643
lastpage:659
numberofpages:17
info:eu-repo/semantics/openAccess
ELETTRONICO
Sapienza Università Editrice
country:ITA
place:Roma
oai:iris.polito.it:11583/29714582024-03-17T01:45:50Zcom_11583_2614429com_11583_2614425col_11583_2614405
Computational BIM design approach supporting Spatial Analysis: the case of healthcare facilities
Ugliotti, Francesca Maria
Shahriari, Farzane
Ugliotti, Francesca Maria
Shahriari, Farzane
Building Information Modelling, Visual Programming Language, Space Syntax, Graph Theory, Space Performance
Architectural planning and spaces organisation are primary aspects of the design of a building.
Architects are constantly looking for solutions that seek to combine increasingly high-performance
aesthetic and functional factors according to specific purposes of use. On the other hand, the building
process has resulted from some logic that shapes the built environment, such as urban morphology,
climate conditions, economic context. The interaction of specialist disciplines and among stakeholders
often leads to changing the original idea of the configuration. Methodologies and tools are needed to
verify that the initial requirements are met according to the social patterns. The relationship between
spaces, functions, and social activities is crucial for built environment management, particularly relevant
in healthcare. From the Space Syntax science-based, human-focused approach, this paper presents
a methodological framework and toolkit to exploit the potential of Building Information Modelling
within this field. Parametric models are used both to implement data and to automatize the evaluation
of indicators based on the level of interaction and depth of spaces. The objective is to establish a database
and a shared language to correlate spatial analysis with other disciplines. The proposed method
can be adopted for an expeditious evaluation of the current state of the buildings, thus becoming an
iterative assessment procedure of design solutions and re-functionalisation projects.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2971458
10.3280/oa-832-c182
info:eu-repo/semantics/altIdentifier/isbn/9788835141938
https://series.francoangeli.it/index.php/oa/catalog/book/832
https://series.francoangeli.it/index.php/oa/catalog/view/832/681/5067
eng
ispartofbook:DIALOGHI / DIALOGUES • visioni e visualità / visions and visuality: Testimoniare Comunicare Sperimentare / Witnessing Communicating Experimenting
43° CONVEGNO INTERNAZIONALE DEI DOCENTI DELLE DISCIPLINE DELLA RAPPRESENTAZIONE CONGRESSO DELLA UNIONE ITALIANA PER IL DISEGNO / 43rd INTERNATIONAL CONFERENCE OF REPRESENTATION DISCIPLINES TEACHERS CONGRESS OF UNIONE ITALIANA PER IL DISEGNO
volume:DIALOGHI / DIALOGUES • visioni e visualità / visions and visuality: Testimoniare Comunicare Sperimentare / Witnessing Communicating Experimenting
firstpage:2925
lastpage:2936
numberofpages:12
journal:DISEGNO
info:eu-repo/semantics/openAccess
ELETTRONICO
FrancoAngeli
country:ITA
place:Milano, Italia
oai:iris.polito.it:11583/29719582024-03-08T04:43:06Zcom_11583_2614429com_11583_2614425col_11583_2614405
Full-scale testing and analysis of 50-year old prestressed concrete bridge girders
Tondolo, F.
Sabia, D.
Chiaia, B.
Quattrone, A.
Savino, P.
Biondini, F.
Rosati, G.
Anghileri, M.
Tondolo, F.
Sabia, D.
Chiaia, B.
Quattrone, A.
Savino, P.
Biondini, F.
Rosati, G.
Anghileri, M.
This research covers the full-scale tests conducted on a 50-year old prestressed concrete girders. The girders were removed from an existing viaduct in Turin, Italy, and gave the possibility to setup a large experimental campaign as part of the research project named BRIDGE|50 (www.bridge 50.org). This study presents results of the experimental investigation of the behavior of precast prestressed concrete deck beams with approximately 19.2 m span length and I-shaped cross section. For each specimen, static tests were carried out monotonically or cyclically under service load and ultimate load, while monitoring strain profiles, deflection and crack opening. Several methods were used to test the effective prestress of the prestressing strands and for the detailed assessment of the condition, namely dynamic tests and ultrasonic tests. Load-deflection response and measured physical parameters were compared to that predicted by theoretical analysis. Results indicate the merit and promise of the study to support the assessment of residual structural performance of existing bridges exposed to deterioration processes.
2022
info:eu-repo/semantics/conferenceObject
http://hdl.handle.net/11583/2971958
10.1201/9781003322641-220
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85170355953
info:eu-repo/semantics/altIdentifier/isbn/9781003322641
https://www.taylorfrancis.com/chapters/edit/10.1201/9781003322641-220/full-scale-testing-analysis-50-year-old-prestressed-concrete-bridge-girders-tondolo-sabia-chiaia-quattrone-savino-biondini-rosati-anghileri
eng
ispartofbook:Bridge Safety, Maintenance, Management, Life-Cycle, Resilience and Sustainability
11th International Conference on Bridge Maintenance, Safety & Management (IABMAS 2022)
firstpage:1775
lastpage:1782
numberofpages:8
serie:Bridge Safety, Maintenance, Management, Life-Cycle, Resilience and Sustainability
info:eu-repo/semantics/openAccess
ELETTRONICO
Taylor & Francis
oai:iris.polito.it:11583/29715422023-06-29T07:05:45Zcom_11583_2614429com_11583_2614425col_11583_2614405
Prediction of the Impact of Approximate Computing on Spiking Neural Networks via Interval Arithmetic
Saeedi, Sepide
Carpegna, Alessio
Savino, Alessandro
Di Carlo, Stefano
Saeedi, Sepide
Carpegna, Alessio
Savino, Alessandro
Di Carlo, Stefano
approximate computing
spiking neural network
interval arithmetic
Approximate Computing (AxC) techniques allow trade-off accuracy for performance, energy, and area reduction gains. One of the applications suitable for using AxC techniques are the Spiking Neural Networks (SNNs). SNNs are the new frontier for artificial intelligence since they allow for a more reliable hardware design. Unfortunately, this design requires some area minimization strategies when the target hardware reaches the edge of computing. In this work, we first extract the computation flow of an SNN, then employ Interval Arithmetic (IA) to model the propagation of the approximation error. This enables a quick evaluation of the impact of approximation. Experimental results confirm the model’s adherence and the capability of reducing the exploration time.
2022
info:eu-repo/semantics/conferenceObject
http://hdl.handle.net/11583/2971542
10.1109/LATS57337.2022.9936999
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85142776673
https://ieeexplore.ieee.org/document/9936999
info:eu-repo/semantics/altIdentifier/wos/WOS:000903702200018
eng
ispartofbook:23rd IEEE Latin-American Test Symposium (LATS 2022)
23rd IEEE Latin-American Test Symposium (LATS 2022)
firstpage:1
lastpage:6
numberofpages:6
info:eu-repo/grantAgreement/EC/H2020/corda__h2020::f0ef61be98756c58baf8a65aca836dbc
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29870672024-03-18T11:19:30Zcom_11583_2614429com_11583_2614425col_11583_2614405
Service-life extension of transport infrastructure through structural control
Martinelli L.
Domaneschi M.
Cucuzza R.
Noori M.
Martinelli, L.
Domaneschi, M.
Cucuzza, R.
Noori, M.
Transportation Infrastructure Systems are recognized as essential for economic development, territorial cohesion, and social transformation. Due to the increasing age of bridges, and given that a large part of the existing stock was built several decades ago, some of their key structural components, such as bridges, are getting older while loading conditions are often exceeding those initially envisaged as they are subjected to harsher natural events and growing levels of traffic. The increasing age of bridges, the deterioration phenomena and the increase in service conditions, exceeding those used in the initial design, contribute to reduce their reliability level. This contribution firstly explores the role that structural control can play, then it proposes a suitable measure for the formalization of this role within the life-cycle assessment of bridges and overcrossing structures. The effects of structural control are evaluated for the case study of a cable-supported bridge subjected to fatigue deterioration due to wind actions
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2987067
10.1201/9781003323020-510
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85186419784
info:eu-repo/semantics/altIdentifier/isbn/9781003323020
https://www.taylorfrancis.com/chapters/oa-edit/10.1201/9781003323020-510/service-life-extension-transport-infrastructure-structural-control-martinelli-domaneschi-cucuzza-noori
eng
ispartofbook:Life-Cycle of Structures and Infrastructure Systems - Proceedings of the 8th International Symposium on Life-Cycle Civil Engineering, IALCCE 2023
8th International Symposium on Life-Cycle Civil Engineering, IALCCE 2023
firstpage:4139
lastpage:4146
numberofpages:8
info:eu-repo/semantics/openAccess
CRC Press/Balkema
oai:iris.polito.it:11583/29841702024-03-17T22:38:35Zcom_11583_2614429com_11583_2614425col_11583_2614405
Tactile based robotic skills for cable routing operations
Monguzzi, Andrea
Pelosi, Martina
Zanchettin, Andrea Maria
Rocco, Paolo
Monguzzi, Andrea
Pelosi, Martina
Zanchettin, Andrea Maria
Rocco, Paolo
Robotic skill
Capacitive tactile sensor
Deformable Linear Object
cable routing
contour following
This paper proposes a set of tactile based skills to perform robotic cable routing operations for deformable linear objects (DLOs) characterized by considerable stiffness and constrained at both ends. In particular, tactile data are exploited to reconstruct the shape of the grasped portion of the DLO and to estimate the future local one. This information is exploited to obtain a grasping configuration aligned to the local shape of the DLO, starting from a rough initial grasping pose, and to follow the DLO's contour in the three-dimensional space. Taking into account the distance travelled along the arc length of the DLO, the robot can detect the cable segments that must be firmly grasped and inserted in intermediate clips, continuing then to slide along the contour until the next DLO's portion, that has to be clipped, is reached. The proposed skills are experimentally validated with an industrial robot on different DLOs in several configurations and on a cable routing use case.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2984170
10.1109/ICRA48891.2023.10160729
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85168700436
info:eu-repo/semantics/altIdentifier/isbn/979-8-3503-2365-8
https://ieeexplore.ieee.org/abstract/document/10160729
https://www.scopus.com/record/display.uri?eid=2-s2.0-85168700436&origin=resultslist&sort=plf-f&src=s&sid=027cc64d9b354d1345fa84dac2f8a879&sot=b&sdt=b&s=TITLE-ABS-KEY(tactile+based+robotic+skills)&sl=43&sessionSearchId=027cc64d9b354d1345fa84dac2f8a879
eng
ispartofbook:2023 IEEE International Conference on Robotics and Automation (ICRA)
IEEE International Conference on Robotics and Automation (ICRA)
firstpage:3793
lastpage:3799
numberofpages:7
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29873232024-03-27T07:33:52Zcom_11583_2614429com_11583_2614425col_11583_2614405
DriftLens: A Concept Drift Detection Tool
Greco, Salvatore
Vacchetti, Bartolomeo
Apiletti, Daniele
Cerquitelli, Tania
Greco, Salvatore
Vacchetti, Bartolomeo
Apiletti, Daniele
Cerquitelli, Tania
concept drift
data drift
deep learning
Concept drift refers to changes in data distribution over time that
can lead to performance degradation of deep learning systems.
Production models need to be continuously monitored for drift.
Detecting concept drift poses significant challenges for deep
classifiers working with unstructured data, especially when the
true labels for new samples are not available and the data has
high dimensionality. In such scenarios, drift detection must be
approached using unsupervised methods.
This paper presents the demo of a tool that uses an effective
unsupervised drift detection technique for deep classifiers on
unstructured data, namely DriftLens. The tool enables users to
i) experiment with different controlled drift patterns on multiple
preloaded text and image classifiers and ii) detect possible drifts
on new models and data streams. The recorded demo of the
tool, available at https://youtu.be/1R2igFhMD8U, shows how end
users can interact with DriftLens and use it to continuously
monitor models for concept and data drift.
2024
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2987323
info:eu-repo/semantics/altIdentifier/isbn/978-3-89318-091-2
https://openproceedings.org/2024/conf/edbt/paper-239.pdf
eng
ispartofbook:Advances in Database Technology
Proceedings 27th International Conference on Extending Database Technology ( EDBT 2024 )
volume:27
firstpage:806
lastpage:809
numberofpages:4
info:eu-repo/semantics/openAccess
ELETTRONICO
Open proceedings
oai:iris.polito.it:11583/29870762024-03-20T01:02:11Zcom_11583_2614429com_11583_2614425col_11583_2614405
Diffusion-Based Image Generation for In-Distribution Data Augmentation in Surface Defect Detection
Capogrosso, Luigi
Girella, Federico
Taioli, Francesco
Chiara, Michele
Aqeel, Muhammad
Fummi, Franco
Setti, Francesco
Cristani, Marco
Capogrosso, Luigi
Girella, Federico
Taioli, Francesco
Chiara, Michele
Aqeel, Muhammad
Fummi, Franco
Setti, Francesco
Cristani, Marco
Diffusion Model
Data Augmentation
Surface Defect Detection
In this study, we show that diffusion models can be used in industrial scenarios to improve the data augmentation procedure in the context of surface defect detection. In general, defect detection classifiers are trained on ground-truth data formed by normal samples (negative data) and samples with defects (positive data), where the latter are consistently fewer than normal samples. For these reasons, state-of-the-art data augmentation procedures add synthetic defect data by superimposing artifacts to normal samples. This leads to out-of-distribution augmented data so that the classification system learns what is not a normal sample but does not know what a defect really is. We show that diffusion models overcome this situation, providing more realistic in-distribution defects so that the model can learn the defect’s genuine appearance. We propose a novel approach for data augmentation that mixes out-of-distribution with in-distribution samples, which we call In&Out. The approach can deal with two data augmentation setups: i) when no defects are available (zero-shot data augmentation) and ii) when defects are available, which can be in a small number (few-shot) or a large one (full-shot). We focus the experimental part on the most challenging benchmark in the state-of-the-art, i.e., the Kolektor Surface-Defect Dataset 2, defining the new state-of-the-art classification AP score under weak supervision of .782. The code is available at https://github.com/intelligolabs/in_and_out.
2024
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2987076
10.5220/0012350400003660
info:eu-repo/semantics/altIdentifier/isbn/978-989-758-679-8
https://www.scitepress.org/Link.aspx?doi=10.5220/0012350400003660
eng
ispartofbook:Proceedings of the 19th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - (Volume 2)
19th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications
volume:2
firstpage:409
lastpage:416
numberofpages:8
ELETTRONICO
SciTePress
oai:iris.polito.it:11583/29744222024-03-15T21:19:47Zcom_11583_2614429com_11583_2614425col_11583_2614405
K-band GaAs Doherty Power Amplifiers for microwave backhaul
Quaglia, Roberto
Ramella, Chiara
Piacibello, Anna
Camarchia, Vittorio
Pirola, Marco
Quaglia, Roberto
Ramella, Chiara
Piacibello, Anna
Camarchia, Vittorio
Pirola, Marco
Doherty power amplifier
GaA
MMIC
K-band
microwave radios
This paper presents the design and characterization of two Doherty power amplifiers for K-band applications implemented with Qorvo's 150 nm GaAs pHEMT technology. A 1 W module is developed first, and a 2 W amplifier is then obtained by combining on-chip two identical Doherty modules. The complete characterization of the two amplifiers demonstrates that the design approach, based on a matching combiner rather than a 50 Ω combiner, leads to very good combining efficiency with a relatively compact layout. The combined amplifier achieves, in the 23.2 GHz-25.2 GHz range, an output power in excess of 32 dBm, a remarkably high power for a GaAs Doherty MMIC amplifier at these frequencies. The small-signal gain is around 10 dB, while the power-added efficiency is higher than 24% and 19% at maximum power and at 6 dB back-off, respectively, over the whole frequency range.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2974422
10.1109/INMMiC54248.2022.9762217
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85130308711
info:eu-repo/semantics/altIdentifier/isbn/978-1-6654-7845-8
https://ieeexplore.ieee.org/document/9762217
info:eu-repo/semantics/altIdentifier/wos/WOS:000852718000017
eng
ispartofbook:Proceedings 2022 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC)
2022 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC)
firstpage:1
lastpage:3
numberofpages:3
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29804932023-09-20T23:07:47Zcom_11583_2614429com_11583_2614425col_11583_2614405
Analyzing the Architectural Impact of Transient Fault Effects in SFUs of GPUs
Rodriguez Condia, Josie E.
Guerrero-Balaguera, Juan-David
Patiño Núñez, Edwar J.
Limas, Robert
Reorda, Matteo Sonza
Rodriguez Condia, Josie E.
Guerrero-Balaguera, Juan-David
Patiño Núñez, Edwar J.
Limas, Robert
Reorda, Matteo Sonza
This work has been supported by the National Resilience and Recovery Plan (PNRR) through the National Center for HPC, Big Data and Quantum Computing.Graphics Processing Units (GPUs) are crucial in modern safety-critical systems to implement complex and dense algorithms, so their reliability plays an essential role in several domains (e.g., automotive and autonomous machines). In fact, reliability evaluations in GPUs and their internal units are of special interest by their high parallelism and to identify vulnerable structures. In particular, Special Function Unit (SFU) cores, inside GPUs, are highly used in multimedia, scientific computing, and the training of neural networks. However, reliability evaluations in SFUs have remained highly unexplored. This work evaluates the impact of transient faults in the hardware structures of SFUs for GPUs. We focus on evaluating and analyzing two SFU architectures (‘fused’ and ‘modular’) and their relations to energy, area, and reliability impact on GPU workloads. The evaluation resorts to a fine-grain analysis with experiments using an RTL open-source GPU (FlexGripPlus) instrumented with both SFUs. The experimental results on both SFU architectures indicate that modular SFUs are less vulnerable to transient faults (in up to 47% for the analyzed workloads) and are more power efficient (in up to 36.6%) but require additional cost in terms of area (about 27%) in comparison with a fused SFU architecture (base for commercial devices), which seems more vulnerable to faults, but is area efficient.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2980493
10.1109/LATS58125.2023.10154504
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85164708823
info:eu-repo/semantics/altIdentifier/isbn/979-8-3503-2597-3
https://ieeexplore.ieee.org/document/10154504
info:eu-repo/semantics/altIdentifier/wos/WOS:001017764900024
eng
ispartofbook:2023 IEEE 24th Latin American Test Symposium (LATS)
2023 IEEE 24th Latin American Test Symposium (LATS)
firstpage:1
lastpage:6
numberofpages:6
info:eu-repo/semantics/closedAccess
IEEE
oai:iris.polito.it:11583/29791612024-03-07T04:36:31Zcom_11583_2614429com_11583_2614425col_11583_2614405
ANALYSIS OF THE PUBLIC PROCUREMENT RULES IN SPAIN AND IN ITALY
[ANÁLISIS DE LA NORMATIVA DE CONTRATACIÓN PÚBLICA EN ESPAÑA Y EN ITALIA]
Fuentes-Bargues, José Luis
Piccirillo, Elisabetta
Rebaudengo, Manuela
González-Cruz, M. Carmen
Grosso, Rachele
Fuentes-Bargues, José Lui
Piccirillo, Elisabetta
Rebaudengo, Manuela
González-Cruz, M. Carmen
Grosso, Rachele
2019
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2979161
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85150594122
info:eu-repo/semantics/altIdentifier/isbn/978-84-09-13557-8
eng
spa
ispartofbook:Proceedings from the International Congress on Project Management and Engineering
23rd International Congress on Project Management and Engineering, CIDIP 2019
numberofpages:12
info:eu-repo/semantics/openAccess
Asociacion Espanola de Direccion e Ingenieria de Proyectos (AEIPRO)
oai:iris.polito.it:11583/29771812024-03-16T03:18:59Zcom_11583_2614429com_11583_2614425col_11583_2614405
Method to quantify the electrical efficiency of a ns-DBD plasma actuator
F Avallone
G Correale
Avallone, F
Correale, G
2015
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2977181
eng
ispartofbook:Titolo volume non avvalorato
Proceedings of the 10th pacific symposium on flow visualization and image processing
firstpage:1
lastpage:10
numberofpages:10
NA
oai:iris.polito.it:11583/29771592024-03-16T03:07:28Zcom_11583_2614429com_11583_2614425col_11583_2614405
Near-wall pressure fluctuations over noise reduction add-ons
Avallone F.
van der Velden W.
Merino Martinez R.
Ragni D.
Avallone, F.
van der Velden, W.
Merino Martinez, R.
Ragni, D.
2017
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2977159
10.2514/6.2017-4171
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85088411228
info:eu-repo/semantics/altIdentifier/isbn/978-1-62410-504-3
ispartofbook:Titolo volume non avvalorato
23rd AIAA/CEAS Aeroacoustics Conference
American Institute of Aeronautics and Astronautics, Inc.
oai:iris.polito.it:11583/29728472024-03-09T07:49:38Zcom_11583_2614429com_11583_2614425col_11583_2614405
How do Business Angels operate in impact investing?
Davide Viglialoro
Alessandro Laspia
Elisa Ughetto
Paolo Landoni
Tiago Botelho
Viglialoro, Davide
Laspia, Alessandro
Ughetto, Elisa
Landoni, Paolo
Botelho, Tiago
Business Angel
impact investing
investment proce
Social Business Angel
mixed method
Startups with a significant social impact can play a crucial role in contributing to
societal transformation. However, to enhance their survival likelihood they need
adequate financial resources and entrepreneurial support. Business angels are
known to support entrepreneurs with these resource requirements. However,
previous angel literature has mainly focused on ventures with high growth
potential. Our study aims to understand if business angels who intentionally
prioritise investments in startups with a significant social impact (Social Business
Angels) have different investment behaviours. Two sources of data are used to
examine this issue; a survey with 359 business angels operating in Italy and a
follow up interview with 10 Social Business Angels. Our findings show that
investment evaluation criteria and the investment process followed by Social
Business Angels differ from those followed by their counterparts. This study
contributes to the impact investment literature as well as the entrepreneurial
finance literature.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2972847
info:eu-repo/semantics/altIdentifier/isbn/978-1-900862-34-9
eng
ispartofbook:ISBE 2022
New Approaches to Raising Entrepreneurial Opportunity: Reshaping inclusive Enterprise, Policy, and Practice Post-Pandemic
numberofpages:57
info:eu-repo/semantics/closedAccess
Institute for Small Business and Entrepreneurship (ISBE)
oai:iris.polito.it:11583/29814092024-03-16T03:30:13Zcom_11583_2614429com_11583_2614425col_11583_2614405
The invisible environmental impact of tourism in show caves: microplastic pollution in three Italian show caves
BALESTRA V.
DRUDI L.
BELLOPEDE R.
Balestra, V.
Drudi, L.
Bellopede, R.
microplastic
show cave
geological heritage
sediment
tourist impact
Show caves are the most important geological heritage in the world, a significant economic resource and unique ecosystems characterized by speleothems, particular species and important drinking water reserves, however, microplastic (MP) pollution in caves is poorly studied. The deposits of three NW Italian show caves were investigated: for each cave, six sediment samples were collected along the tourist paths and one in a non-touristic area. MPs were identified and characterized using MUPL automated software, observed with and without UV light under a microscope, and verified under μFTIR-ATR. MPs were present in sediments of all examined caves: an average of 4300 MPs/kg were found along the tourist paths and of 2570 MPs/kg in the speleological zones. MPs less than 1 mm, fibre-shaped, polyesters and polyolefins dominated the samples suggesting that synthetic clothes are the main source of pollution in show caves. Our results highlight a high pollution of MPs in the examined show caves, despite the different touristic and environmental characteristics. The subterranean environment monitoring gives useful information to assess risks posed by MPs in show caves and consequently define strategies for the conservation and management of caves and natural resources.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2981409
10.30955/gnc2023.00377
eng
ispartofbook:Conference Proceeding Book
18th International Conference on Environmental Science and Tecnology
numberofpages:4
info:eu-repo/semantics/openAccess
ELETTRONICO
CEST
oai:iris.polito.it:11583/29792912024-03-06T03:25:05Zcom_11583_2614429com_11583_2614425col_11583_2614405
Wall treatments for aeroacoustic measurements in closed wind tunnel test sections
Bento, Hugo
Vandercreek, Colin P.
Avallone, Francesco
Ragni, Daniele
Sijtsma, Pieter
Snellen, Mirjam
Bento, Hugo
Vandercreek, Colin P.
Avallone, Francesco
Ragni, Daniele
Sijtsma, Pieter
Snellen, Mirjam
Aeroacoustic tests in closed wind tunnels are affected by reflections in the tunnel circuit and background noise. Reflections can be mitigated by lining the tunnel circuit. The present study investigates if lining exclusively the most accessible segment of a closed wind tunnel circuit, in particular the test section, is an approach which improves acoustic measurements. Literature shows that a wind tunnel lining material should have high acoustic absorption, low inertial resistivity and low surface roughness. Therefore, the test section of TU Delft's closed Low Turbulence Tunnel is lined with melamine foam wall liners. A total of 4 test section configurations were tested: baseline; test section with lining on the floor and ceiling; test section with lined side--panels; and test section lined at all surfaces (floor, ceiling and side--panels). An omnidirectional speaker is used for evaluating the wind tunnel's acoustic performance. A geometric modelling algorithm, based on the mirror-source method, is used to predict the effect of lining on primary reflections in the test section. In addition, reflections in the test section and in the tunnel circuit are characterized experimentally. The results show that the closed loop of the tunnel circuit is responsible for a long reverberation time in the test section. However, reflections inside the test section itself are the dominant source of acoustic interference at the microphone array location. The low fidelity geometric modelling algorithm is shown to be a valuable approach for an initial estimation of the acoustic benefit of lining, for both flow--off and --on conditions. Lining of the test section walls significantly reduces reflections from the reference source, as well as the aerodynamic background noise that reaches the array.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2979291
10.2514/6.2023-4162
info:eu-repo/semantics/altIdentifier/isbn/978-1-62410-704-7
https://arc.aiaa.org/doi/abs/10.2514/6.2023-4162
eng
ispartofbook:Titolo volume non avvalorato
AIAA AVIATION 2023 Forum
info:eu-repo/semantics/openAccess
ELETTRONICO
American Institute of Aeronautics and Astronautics, Inc.
place:Reston
oai:iris.polito.it:11583/29709322024-03-09T07:49:21Zcom_11583_2614429com_11583_2614425col_11583_2614405
PERSPECTIVE OF USING NON-CONTACT COORDINATE MEASURING MACHINE IN AUTOMOBILE INDUSTRY
Jasurkhuja Kholkhujaev
Kholkhujaev, Jasurkhuja
2020
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2970932
eng
rus
uzb
ispartofbook:Integration of innovative technologies into the production process
Republican scientific conference of Uzbekistan
volume:1
firstpage:29
lastpage:31
numberofpages:3
info:eu-repo/semantics/closedAccess
STAMPA
Jixxakh Polytechnic University
place:Jizzakh
oai:iris.polito.it:11583/29760082023-06-29T07:05:55Zcom_11583_2614429com_11583_2614425col_11583_2614405
Network Traffic Analysis of Modular Multiband Integrated WSS based ROADMs
Masood, Muhammad Umar
Khan, Ihtesham
Tunesi, Lorenzo
Correia, Bruno
Ghillino, Enrico
Bardella, Paolo
Carena, Andrea
Curri, Vittorio
Masood, Muhammad Umar
Khan, Ihtesham
Tunesi, Lorenzo
Correia, Bruno
Ghillino, Enrico
Bardella, Paolo
Carena, Andrea
Curri, Vittorio
Multiband
Wavelength Selective Switch
Photonics Integrated circuit
High-capacity System
Network Traffic Analysis
We present a novel photonic integrated multiband wavelength selective switch with a wide spectral operating range. We investigated the network performance of the device for SDM and BDM scenarios. The results show that BDM is a cost-effective solution to extend the network capacity.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2976008
10.1109/IPC53466.2022.9975622
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85145595867
info:eu-repo/semantics/altIdentifier/isbn/978-1-6654-3487-4
https://ieeexplore.ieee.org/document/9975622
eng
ispartofbook:2022 IEEE Photonics Conference (IPC)
2022 IEEE Photonics Conference (IPC)
firstpage:1
lastpage:2
numberofpages:2
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29790382024-03-20T01:18:32Zcom_11583_2614429com_11583_2614425col_11583_2614405
Experimental Evaluation of Dead Time Reverse Conduction Losses in Motor Drives Applications
Palma M.
Musumeci S.
Mandrile F.
Barba V.
Palma, M.
Musumeci, S.
Mandrile, F.
Barba, V.
PCIM Europe 2022
International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
The paper deals with the dead-time impact on the reverse conduction of low-voltage GaN FETs in inverter topology for motor control applications. The current variation in AC motor drive leads to a different dead-time losses mechanism compared to the DC-DC converter. In the paper, the dead-time in the inverter leg is correlated with both current variation and GaN reverse conduction, through an experimental evaluation. Furthermore, a comparison of the GaN FET with a MOSFET with similar parameters in reverse conduction operations is carried out to show the similarities and differences in switching behavior and power losses. Finally, the paper aims to give designers a guideline on the limits and optimum dead-time selection in a GaN FET based inverter leg for motor control applications.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2979038
10.30420/565822072
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85131127232
ispartofbook:PCIM Europe Conference Proceedings
2022 International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, PCIM Europe 2022
firstpage:524
lastpage:529
numberofpages:6
info:eu-repo/semantics/closedAccess
VDE Verlag
oai:iris.polito.it:11583/29857352024-02-10T00:16:42Zcom_11583_2614429com_11583_2614425col_11583_2614405
Performance of monolithic analog pixel test structure with operational amplifier
Ferrero C.
Ferrero, C.
The ALICE Collaboration at CERN foresees to replace, during the LHC LS3, the innermost three layers of the ALICE Inner Tracking System (ITS2) with a new vertex detector composed of bent and ultra-thin monolithic silicon sensors. In this work, the preliminary performance studies of the Analog Pixel Test Structure with an Operational Amplifier output buffer (APTS OPAMP), produced in the 65 nm TowerJazz Panasonic Semiconductor Company (65 nm TPSCo) process, are presented. Results obtained from measurement campaigns with a 55Fe source will be illustrated and discussed. They represent the first step through the validation of the technology and the premise of subsequent in-beam measurements at the Super Proton Synchrotron (SPS) at CERN.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2985735
10.1393/ncc/i2023-23094-9
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85166742525
https://www.sif.it/riviste/sif/ncc/econtents/2023/046/04/article/13
info:eu-repo/semantics/altIdentifier/wos/WOS:001043521100002
eng
ispartofbook:Nuovo Cimento della Societa Italiana di Fisica C
SIF Congress 2022
volume:46
numberofpages:4
journal:LA RIVISTA DEL NUOVO CIMENTO DELLA SOCIETÀ ITALIANA DI FISICA
info:eu-repo/semantics/openAccess
ELETTRONICO
SOC ITALIANA FISICA
place:VIA SARAGOZZA, 12, I-40123 BOLOGNA, ITALY
oai:iris.polito.it:11583/29703032024-03-08T07:53:56Zcom_11583_2614429com_11583_2614425col_11583_2614405
L’approccio parametrico basato su LCA per l’eco-progettazione di involucri edilizi.
Thiebat, Francesca
Tomalini, Andrea
Giovanardi, Matteo
Thiebat, Francesca
Tomalini, Andrea
Giovanardi, Matteo
life cycle design
Life Cycle Assessment
progettazione parametrica
Visual Programming Language
BIM
involucro
Progettare il sistema di facciata di un edificio è un’operazione
complessa e multidisciplinare. Questa complessità deriva dall’eterogeneità
delle prestazioni che deve assicurare il sistema di involucro durante l’intera
vita utile. Alla luce delle sfide imposte dalla transizione verso la neutralità
climatica, l’analisi Life Cycle Assessment (LCA) entra sempre più frequentemente
nella prassi progettuale richiedendo strumenti specifici per valutare
i principali indicatori di impatto ambientale. Sebbene negli ultimi anni vi sia
stato un aumento nel numero di software in grado di eseguire analisi LCA,
oggi è ancora difficile trovare una reale interoperabilità con gli strumenti
di progettazione architettonica. Partendo da tali premesse il contributo propone
un framework di lavoro sviluppato in ambiente Visual Programming
Language (VPL) in grado di esprimere le prestazioni ambientali del progetto
in real time e assicurare un’elevata flessibilità nel progettare edifici capaci di
rispondere alle sfide imposte dal cambiamento climatico.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2970303
info:eu-repo/semantics/altIdentifier/isbn/9791221004564
https://www.reteitalianalca.it/wp-content/uploads/2022/03/AttiConvegno2021LCA.pdf
ita
ispartofbook:Atti del X Convegno dell’Associazione Rete Italiana LCA e XV Convegno della Rete Italiana LCA
INNOVAZIONE E CIRCOLARITÀ Il contributo del Life Cycle Thinking nel Green Deal per la neutralità climatica
firstpage:249
lastpage:255
numberofpages:7
info:eu-repo/semantics/openAccess
ELETTRONICO
Associazione Rete Italiana LCA
oai:iris.polito.it:11583/29856672024-03-08T04:43:17Zcom_11583_2614429com_11583_2614425col_11583_2614405
4D flow MRI study of large-scale hemodynamics correlation persistence in the healthy human aorta using network science
Karol Calo
Andrea Guala
Diego Gallo
Jose Rodriguez Palomares
Stefania Scarsoglio
Luca Ridolfi
Umberto Morbiducci
Calo, Karol
Guala, Andrea
Gallo, Diego
Rodriguez Palomares, Jose
Scarsoglio, Stefania
Ridolfi, Luca
Morbiducci, Umberto
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2985667
info:eu-repo/semantics/altIdentifier/isbn/978-1-7351808-4-7
https://archive.sb3c.org/sb3c2022/
eng
ispartofbook:Proceedings Book of the 2022 Summer Biomechanics, Bioengineering and Biotransport Conference
Summer Biomechanics, Bioengineering and Biotransport Conference 2022
firstpage:466
lastpage:467
numberofpages:2
info:eu-repo/semantics/openAccess
ELETTRONICO
2022 Summer Biomechanics, Bioengineering and Biotransport Conference Foundation, Inc.
oai:iris.polito.it:11583/29786582024-03-18T20:31:35Zcom_11583_2614429com_11583_2614425col_11583_2614405
An open source embedded-GPGPU model for the accurate analysis and mitigation of SEU effects
Du, B.
Rodriguez Condia, Josie E.
Sonza Reorda, M.
Sterpone, L.
Du, B.
Rodriguez Condia, Josie E.
Sonza Reorda, M.
Sterpone, L.
SEU
General Purpose Graphics Processing Units GPGPU
Graphics Processor
Fault Injection
In this paper, we propose a new hardware and synthesizable model of an embedded General Purpose Graphic Processing Unit (GPGPUs) designed for analyzing and mitigating radiation effects. Comparative SEU injection experiments confirms the model effectiveness.
2019
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2978658
10.1109/RADECS47380.2019.9745670
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85087422439
info:eu-repo/semantics/altIdentifier/isbn/978-1-7281-5699-6
https://ieeexplore.ieee.org/document/9745670
info:eu-repo/semantics/altIdentifier/wos/WOS:000848160100044
eng
ispartofbook:2019 19th European Conference on Radiation and Its Effects on Components and Systems RADECS
2019 19th European Conference on Radiation and Its Effects on Components and Systems
firstpage:1
lastpage:4
numberofpages:4
info:eu-repo/semantics/closedAccess
IEEE
place:NEW YORK
oai:iris.polito.it:11583/29836042024-03-20T20:37:35Zcom_11583_2614429com_11583_2614425col_11583_2614405
Investigation on the Loss Allocation Properties in Distribution Networks with Distributed Generation
Mazza, Andrea
Saadatmandi, Soheil
Safina, Salvador
Chicco, Gianfranco
Mazza, Andrea
Saadatmandi, Soheil
Safina, Salvador
Chicco, Gianfranco
allocated losse
distribution system
network losse
photovoltaic
network zone
The allocation of the losses that occur during the operation of the distribution system to the distribution network nodes is useful to understand whether there could be a deficit or an excess of load or local generation in the nodes. This concept is extended in this paper by looking at the zones of the distribution network in which there is an interaction among the generations and loads. The sign of the allocated losses is considered as a useful indicator of the need to provide more load or more local generation in the zone. Specific findings are extracted from the analysis of balanced and unbalanced distribution systems with time-varying load and distributed generation.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2983604
10.1109/UPEC57427.2023.10294476
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85178155440
info:eu-repo/semantics/altIdentifier/isbn/979-8-3503-1683-4
https://ieeexplore.ieee.org/document/10294476
eng
ispartofbook:International Universities Power Engineering Conference
2023 58th International Universities Power Engineering Conference (UPEC)
firstpage:1
lastpage:6
numberofpages:6
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29805102023-09-27T23:13:31Zcom_11583_2614429com_11583_2614425col_11583_2614405
In-vivo proximal monitoring system for plant water stress and biological activity based on stem electrical impedance
Calvo, Stefano
Barezzi, Mattia
Demarchi, Danilo
Garlando, Umberto
Calvo, Stefano
Barezzi, Mattia
Demarchi, Danilo
Garlando, Umberto
Smart agriculture
water stre
stem electrical impedance
plants’ resilience
Population growth and global warming are the main threats to food production. Food security, producing enough food for the entire population, is becoming harder, and new strategies must be applied. Smart agriculture tackles this problem by integrating field sensors and data with the farmers’ knowledge to increase crop yield and reduce resource waste.This paper proposes a system to monitor the plant water stress status. This system monitors the plant directly and does not rely on environmental sensors. Acquired data are sent to a remote server thanks to LoRa communication. The designed system is low-power and relies on a single battery with more than five years of expected lifetime. The system monitors the trunk electrical impedance of plants thanks to a relaxation oscillator with a portion of the trunk in the feedback loop. This way, changes in the impedance are reflected in changes in the oscillator frequency.Two systems were installed directly in the fields and connected to apple trees. Statistical analyses were performed on the acquired data. The correlation between the trunk frequency values and the soil water potential is above 75% for both plants.The proposed system is low-power and low-cost and could be directly adopted in the fields. It can detect the water status of plants directly, avoiding environmental sensors.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2980510
10.1109/IWASI58316.2023.10164553
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85165730582
info:eu-repo/semantics/altIdentifier/isbn/979-8-3503-3694-8
https://ieeexplore.ieee.org/document/10164553
info:eu-repo/semantics/altIdentifier/wos/WOS:001032810800013
eng
ispartofbook:9th International Workshop on Advances in Sensors and Interfaces
2023 9th International Workshop on Advances in Sensors and Interfaces (IWASI)
firstpage:80
lastpage:85
numberofpages:6
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29872522024-03-26T02:50:28Zcom_11583_2614429com_11583_2614425col_11583_2614405
Rigenerazione
Pepino, Thomas
Pepino, Thomas
Rigenerazione
Significazione del lemma "Rigenerazione". La rigenerazione è una filosofia di rinnovamento che trascende il tempo, mirando a preservare il patrimonio e promuovere un cambiamento sociale, economico e ambientale, operando in contesti urbani e rurali.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2987252
info:eu-repo/semantics/altIdentifier/isbn/9791280379030
ita
ispartofbook:Le parole e le forme. Book of Papers
Decimo Forum ProArch Società Scientifica nazionale dei docenti di Progettazione Architettonica, SSD ICAR 14, 15 e 16
firstpage:1082
lastpage:1087
numberofpages:6
info:eu-repo/semantics/closedAccess
STAMPA
Società Scientifica ProArch
country:ITA
place:Roma
oai:iris.polito.it:11583/29870072024-03-16T05:19:56Zcom_11583_2614429com_11583_2614425col_11583_2614405
Seismic detection through state-of-polarization analysis in optical fiber networks
Hasan Awad
Fehmida Usmani
Emanuele Virgillito
Rudi Bratovich
Roberto Proietti
Stefano Straullu
Rosanna Pastorelli
Vittorio Curri
Awad, Hasan
Usmani, Fehmida
Virgillito, Emanuele
Bratovich, Rudi
Proietti, Roberto
Straullu, Stefano
Pastorelli, Rosanna
Curri, Vittorio
Sensing
Polarization
Earthquake
Terrestrial
Optical-Fiber-Network
Machine-Learning
The existing optical fiber terrestrial network can be leveraged to serve as a wide distributed network of sensors, especially to detect mechanical stresses as the optical signal polarization is significantly influenced by external disturbances. Exploiting this trend, paves the way for employing the optical fiber network in environmental sensing, like detecting earthquakes or tracking anthropic activities. The purpose is to examine the changes in the state of light polarization caused by birefringence induced by seismic events. Consequently, we have developed a Python-based Waveplate Model to track state of light polarization changes in buried optical fiber cables. This model integrates real ground motion data from a 4.9 magnitude earthquake that occurred southwest Marradi city in Italy, and converts it into strain values along the fiber cable. To further investigate the effects of this particular seismic activity, we propose a centralized smart grid fiber network approach based on a neural network model with an attention mechanism for earthquake early warnings. Along with the aforementioned Waveplate Model, numerous sets of polarization evolution were produced on two distinct sensing points with different distances from the epicenter in two different cities, enabling earthquake early detection upon P-wave arrivals that precede the earthquake’s destructive surface waves and allowing for a swift initiation of emergency plans including early warning alerts and earthquake countermeasures.
2024
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2987007
10.1117/12.3007808
https://doi.org/10.1117/12.3007808
eng
ispartofbook:Optical Fibers and Sensors for Medical Diagnostics, Treatment, and Environmental Applications XXIV
SPIE Photonics West 2024
numberofpages:5
info:eu-repo/semantics/openAccess
ELETTRONICO
SPIE
oai:iris.polito.it:11583/29823282023-12-02T23:36:47Zcom_11583_2614429com_11583_2614425col_11583_2614405
PoliToHFI at SemEval-2023 Task 6: Leveraging Entity-Aware and Hierarchical Transformers For Legal Entity Recognition and Court Judgment Prediction
Irene Benedetto
Alkis Koudounas
Lorenzo Vaiani
Eliana Pastor
Elena Baralis
Luca Cagliero
Francesco Tarasconi
Benedetto, Irene
Koudounas, Alki
Vaiani, Lorenzo
Pastor, Eliana
Baralis, Elena
Cagliero, Luca
Tarasconi, Francesco
Legal NLP
The use of Natural Language Processing techniques in the legal domain has become established for supporting attorneys and domain experts in content retrieval and decision-making. However, understanding the legal text poses relevant challenges in the recognition of domain-specific entities and the adaptation and explanation of predictive models. This paper addresses the Legal Entity Name Recognition (L-NER) and Court judgment Prediction (CPJ) and Explanation (CJPE) tasks. The L-NER solution explores the use of various transformer-based models, including an entity-aware method attending domain-specific entities. The CJPE proposed method relies on hierarchical BERT-based classifiers combined with local input attribution explainers. We propose a broad comparison of eXplainable AI methodologies along with a novel approach based on NER. For the LNER task, the experimental results remark on the importance of domain-specific pre-training. For CJP our lightweight solution shows performance in line with existing approaches, and our NER-boosted explanations show promising CJPE results in terms of the conciseness of the prediction explanations.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2982328
10.18653/v1/2023.semeval-1.194
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85175399093
https://aclanthology.org/2023.semeval-1.194/
eng
ispartofbook:Proceedings of the 17th International Workshop on Semantic Evaluation (SemEval-2023)
SemEval-2023 (Workshop of ACL)
firstpage:1401
lastpage:1411
numberofpages:11
info:eu-repo/semantics/openAccess
ELETTRONICO
ACL Association for Computational Linguistics
oai:iris.polito.it:11583/29726872024-03-20T18:22:54Zcom_11583_2614429com_11583_2614425col_11583_2614405
Domain specific run time optimization for software data planes
Sebastiano Miano
Alireza Sanaee
Fulvio Risso
Gábor Rétvári
Gianni Antichi
Miano, Sebastiano
Sanaee, Alireza
Risso, FULVIO GIOVANNI OTTAVIO
Rétvári, Gábor
Antichi, Gianni
State-of-the-art approaches to design, develop and optimize software packet-processing programs are based on static compilation: the compiler's input is a description of the forwarding plane semantics and the output is a binary that can accommodate any control plane configuration or input traffic. In this paper, we demonstrate that tracking control plane actions and packet-level traffic dynamics at run time opens up new opportunities for code specialization. We present Morpheus, a system working alongside static compilers that continuously optimizes the targeted networking code. We introduce a number of new techniques, from static code analysis to adaptive code instrumentation, and we implement a toolbox of domain specific optimizations that are not restricted to a specific data plane framework or programming language. We apply Morpheus to several eBPF and DPDK programs including Katran, Facebook's production-grade load balancer. We compare Morpheus against state-of-the-art optimization frameworks and show that it can bring up to 2x throughput improvement, while halving the 99th percentile latency.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2972687
10.1145/3503222.3507769
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85126393961
info:eu-repo/semantics/altIdentifier/isbn/9781450392051
https://dl.acm.org/doi/10.1145/3503222.3507769
info:eu-repo/semantics/altIdentifier/wos/WOS:000810486300080
eng
ispartofbook:Titolo volume non avvalorato
27th ACM International Conference on Architectural Support for Programming Languages and Operating Systems
firstpage:1148
lastpage:1164
numberofpages:17
info:eu-repo/semantics/openAccess
STAMPA
IEEE
oai:iris.polito.it:11583/29738812024-03-08T10:30:12Zcom_11583_2614429com_11583_2614425col_11583_2614405
PBM modelling of Pickering emulsions for Janus particles synthesis
Graziano Frungieri
Heiko Briesen
Frungieri, Graziano
Briesen, Heiko
population balance
Pickering emulsion
Janus particle
Monte Carlo
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2973881
eng
ispartofbook:Titolo volume non avvalorato
7th International Conference on Population Balance Modelling (PBM 2022)
numberofpages:3
info:eu-repo/semantics/openAccess
ELETTRONICO
PBM2022 Conference
oai:iris.polito.it:11583/29820792024-03-22T22:25:46Zcom_11583_2614429com_11583_2614425col_11583_2614405
Optical coherence tomography angiography for chronic venous insufficiency and venous leg ulcer
Rotunno, Giulia
Deinsberger, Julia
Meiburger, Kristen
Krainz, Lisa
Bugyi, Lukasz
Haindl, Richard
Leitgeb, Rainer
Weber, Benedikt
Drexler, Wolfgang
Liu, Mengyang
Rotunno, Giulia
Deinsberger, Julia
Meiburger, Kristen
Krainz, Lisa
Bugyi, Lukasz
Haindl, Richard
Leitgeb, Rainer
Weber, Benedikt
Drexler, Wolfgang
Liu, Mengyang
Chronic venous insufficiency (CVI) ranks among the most common health care issues worldwide. The current diagnosis of CVI is done by clinical examination and duplex ultrasound, which can only detect visible physical changes and deeper vascular structures whereas the superficial cutaneous vasculature cannot be resolved. There is indeed a lack of information that can potentially be extracted from the cutaneous microvasculature of patients affected by CVI. In this work, we designed and applied an optical coherence tomography angiography (OCTA) system, which is customized for
lower extremity imaging of patients. Featuring fast imaging speed, large field of view, high spatial resolution, and most importantly non-invasiveness, this OCTA system was successfully applied in CVI and venous leg ulcer patient imaging. Using the OCTA results acquired from a cohort of 27 human subjects, we can clearly distinguish the vascular patterns uniquely associated with various stages of CVI. The findings of this study give an unexplored indicator to the disease of CVI and venous leg ulcer. With more patients to be recruited, we believe that OCTA imaging results for CVI can be
used as a powerful tool in CVI screening and diagnosis.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2982079
10.1117/12.2670767
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85172227035
info:eu-repo/semantics/altIdentifier/isbn/9781510664630
info:eu-repo/semantics/altIdentifier/isbn/9781510664647
https://doi.org/10.1117/12.2670767
info:eu-repo/semantics/altIdentifier/wos/WOS:001066712600034
eng
ispartofbook:Translational Biophotonics: Diagnostics and Therapeutics III
European Conferences on Biomedical Optics (ECBO)
volume:12627
firstpage:85
numberofpages:3
info:eu-repo/semantics/openAccess
ELETTRONICO
SPIE
country:USA
oai:iris.polito.it:11583/29806112024-03-23T02:19:12Zcom_11583_2614429com_11583_2614425col_11583_2614405
Frammenti in avvenire. L’origine della forma dell’immagine della Collina di Cristallo di Sanremo
Pepino, Thomas
Pepino, Thomas
scaling
territorio
architettura
progetto
serre
Questo volume racchiude gli atti di un convegno della Società scientifica "ProArch", già pubblicati nella forma sintetica del Book of Abstract. I contributi scientifici raccolti documentano un periodo della cultura architettonica italiana e delle pratiche del progetto in cui il sistema delle “certezze disciplinari”, o comunque i paradigmi che hanno sorretto la moderna cultura architettonica, vengono messi in discussione da una continua e imprevedibile modificazione dei modelli e dei contesti di riferimento. L’architettura, se riconosciuta come disciplina che aspira alla produzione di manufatti e configurazioni che contengono la determinazione di una stabilità temporale, si trova infatti a dover interpretare il contraddittorio processo di modificazione continua che, oltre a mettere in crisi le concezioni progettuali che si affidavano alla corrispondenza funzionale come matrice della necessità, rende sempre più debole l’immagine dell’architettura come “scena fissa” e riferimento costante delle comunità che abitano i luoghi. La pubblicazione sarà consultabile in open source presso il link: www.progettazionearchitettonica.eu
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2980611
info:eu-repo/semantics/altIdentifier/isbn/9791280379023
https://progettazionearchitettonica.eu/wp-content/uploads/2023/04/Transizioni-BOP.pdf
ita
ispartofbook:TRANSIZIONI. L'avvenire della didattica e della ricerca per il progetto di architettura. Book of Papers
TRANSIZIONI. L'avvenire della didattica e della ricerca per il progetto di architettura (IX Forum ProArch)
firstpage:867
lastpage:872
numberofpages:6
info:eu-repo/semantics/closedAccess
ELETTRONICO
Società Scientifica ProArch
country:ITA
place:Cagliari
oai:iris.polito.it:11583/29828262024-03-13T21:35:51Zcom_11583_2614429com_11583_2614425col_11583_2614405
FRCM retrofitting techniques for masonry walls: a literature review and some laboratory tests
Cucuzza R.
Domaneschi M.
Camata G.
Marano G. C.
Formisano A.
Brigante D.
Cucuzza, R.
Domaneschi, M.
Camata, G.
Marano, G. C.
Formisano, A.
Brigante, D.
experimental investigation
fiber reinforced concrete
masonry
retrofitting
Review
textile reinforced mortar
The experimental characterisation of externally bonded composite materials as strengthening solutions for masonry structures, such as basalt textile reinforced mortar (BTRM) or fiber reinforced concrete (FRC), has been receiving increasing attention due to their outstanding mechanical performance. Several studies have been demonstrated the efficiency of this retrofitting solution for increasing the mechanical strength and the displacement capacity of masonry material. In this paper the state-of-art of the most relevant achievements in the experimental investigations and numerical analysis of retrofitted masonry wall have been critically reviewed. Firstly, a detailed collection of several experimental tests using different textile reinforced mortar and/or fiber reinforced mortar has been conducted. Special focus has been given to the test set-up and load configuration type adopted for experiments. Subsequently, several modelling techniques have been treated in order to detect the best approach simulating the interaction between reinforcement system and masonry ranging from macro and micro modelling, concentrated and diffused plasticity model and diverse constitutive laws. Finally, an overview of some original experimental outcomes from laboratory tests is presented. This results will play a major role in for the validation of the numerical models for the prediction of the shear strength and the ductile behavior of reinforced masonry that will be developed in a further step of this research.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2982826
10.1016/j.prostr.2023.01.280
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85159093728
info:eu-repo/semantics/altIdentifier/isbn/9781713870418
https://www.sciencedirect.com/science/article/pii/S2452321623002895?pes=vor
eng
ispartofbook:XIX ANIDIS Conference, Seismic Engineering in Italy
19th ANIDIS Conference, Seismic Engineering in Italy
volume:44
firstpage:2190
lastpage:2197
numberofpages:8
journal:PROCEDIA STRUCTURAL INTEGRITY
info:eu-repo/semantics/openAccess
Elsevier
oai:iris.polito.it:11583/29836182024-03-09T08:48:28Zcom_11583_2614429com_11583_2614425col_11583_2614405
Multi-objective training of an algebraic heat flux model to cure model-data inconsistencies in the momentum treatment
E. Saccaggi
M. Fiore
L. Koloszar
M. Mendez
Saccaggi, E.
Fiore, M.
Koloszar, L.
Mendez, M.
Machine learning, turbulence thermal modelling, heat exchange, OpenFoam, Pytorch, CFD, turbulence
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2983618
ispartofbook:M2P 2023
Math 2 Product (M2P) Emerging Technologies in Computational Science for Industry, Sustainability and Innovation
info:eu-repo/semantics/openAccess
ECCOMAS
oai:iris.polito.it:11583/29771072024-03-16T03:18:06Zcom_11583_2614429com_11583_2614425col_11583_2614405
Lo spazio della scuola. Metodi e strumenti per progettare la trasformazione dell’infrastruttura scolastica italiana
caterina barioglio
caterina quaglio
daniele campobenedetto
lorenzo murru
Barioglio, Caterina
Quaglio, Caterina
Campobenedetto, Daniele
Murru, Lorenzo
school
governance
urban regeneration
L’infrastruttura scolastica italiana è composta da quasi 40.000 edifici distribuiti su tutto il territorio nazionale e realizzati in momenti e con tecniche costruttive diverse. Un patrimonio diversificato e stratificato che, tuttavia, presenta limiti funzionali, energetici e strutturali che i cambiamenti demografici e pedagogici degli ultimi anni e l’emergenza sanitaria poi hanno posto sotto i riflettori. In questo contesto, il gruppo di ricerca interdipartimentale Future Urban Legacy Lab (FULL) del Politecnico di Torino ha avviato una riflessione di ampio respiro al fine di elaborare un metodo per supportare il processo di rigenerazione degli spazi scolastici attraverso concreti strumenti operativi. Il metodo proposto da FULL si articola in una serie di operazioni tra loro complementari. L’individuazione e analisi di ricorrenze tipologiche e territoriali rappresenta il presupposto per l’identificazione di priorità di intervento alla scala regionale e l’avvio di interventi di rigenerazione basati su sistemi di governance multiscalari che si servano dello spazio fisico delle scuole come base documentale. L’obiettivo è di rendere leggibili, argomentabili e incrementabili – attraverso banche dati condivise e integrate – questioni e temi possibili di lavoro da cui partire a seconda delle esigenze, delle risorse disponibili e dei soggetti coinvolti. In questa cornice, uno dei primi esiti operativi del progetto è stata la web-app interattiva Re-school, un primo passo per l’implementazione di una piattaforma condivisa di supporto alla progettualità di insegnanti e attori pubblici e allo scambio di buone pratiche.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2977107
info:eu-repo/semantics/altIdentifier/isbn/978-88-99237-48-6
http://www.planum.bedita.net/planum-magazine/planum-publisher-publication/atti-della-xxiv-conferenza-nazionale-siu-volume-sei-perrone-marchigiani-savoldi-tosi
ita
ispartofbook:Forme di welfare e dotazioni di servizi, un’eredità in continua evoluzione
XXIV Conferenza Nazionale SIU Dare valore ai valori in urbanistica
volume:6
firstpage:214
lastpage:220
numberofpages:7
info:eu-repo/semantics/openAccess
ELETTRONICO
Planum Publisher e Società Italiana degli Urbanisti
place:Roma-Milano
oai:iris.polito.it:11583/29849392024-02-27T03:43:35Zcom_11583_2614429com_11583_2614425col_11583_2614405
Wall shear stress topological skeleton variability predicts plaque growth in human coronary arteries
Giuseppe De Nisco
Eline M. Hartman
Valentina Mazzi
Diego Gallo
Claudio Chiastra
Joost Daemen
Jolanda J. Wentzel
Umberto Morbiducci
DE NISCO, Giuseppe
Hartman, Eline M.
Mazzi, Valentina
Gallo, Diego
Chiastra, Claudio
Daemen, Joost
Wentzel, Jolanda J.
Morbiducci, Umberto
Introduction
In last decades wall shear stress (WSS) has gained consensus as hemodynamic mechanism for coronary atherosclerosis. However, the exact biomechanical stimulus affecting early atherosclerosis is still undetermined. To bridge this knowledge gap, the WSS topological skeleton (TS) is receiving increasing interest, because of its link with flow disturbances associated to vascular dysfunction, and its capability to improve the description of the complex biomechanical stimulus affecting atherosclerosis evolution. The WSS TS consists of fixed points, where WSS vanishes, and unstable/stable manifolds, where WSS exerts a contraction/expansion action on the endothelium, thus dictating intracellular and cell-cell tension definition. Here we test the ability of WSS TS to predict the coronary artery plaque burden (PB) temporal evolution in 49 patient-specific computational models of human coronary arteries.
Methods
The methods workflow is provided in Figure 1. Forty-eight hemodynamically stable patients with acute coronary syndrome and at least one non-culprit coronary segment, were enrolled5. Previous coronary bypass graft surgery, renal insufficiency (creatinine clearing<50ml/min), ejection fraction<30%, and atrial fibrillation, were considered as exclusion criteria. After successful percutaneous coronary intervention of culprit vessel, the non-culprit coronary segment was imaged by coronary computed tomography (CCTA) angiography and intravascular ultrasound (IVUS) at intervention time (T1) and at 1 year follow-up (T2).
3D vessel geometries were reconstructed at T1, and computational fluid dynamics simulations were performed prescribing patient-specific boundary conditions. WSS analysis was based on time average WSS (TAWSS), and topological shear variation index (TSVI),2 quantifying the variability of the local WSS contraction/expansion action on the endothelium along the cardiac cycle. PB growth was measured on IVUS images as the difference between PB (100*plaque area/total vessel area) at T2 and T1, adjusted to PB at T1 and averaged over 1.5mm/45° luminal sectors. WSS-based quantities were averaged over the same luminal sectors and classified into artery-specific (low, mid, and high) tertiles.
Results
Figure 2 presents the luminal distributions of T2-T1 PB growth, and TAWSS and TSVI at T1 for six explanatory cases. The luminal sectors-based distribution of adjusted PB growth within low, mid, or high values of TAWSS and TSVI is also reported. Luminal sectors exposed to high TSVI at T1 exhibit T2-T1 PB growth significantly higher than sectors exposed to low (p<0.05) or mid (p<0.01) TSVI. A clear trend (even if not significant) emerges also for the exposure to low TAWSS at T1 and PB growth, the latter being higher in luminal sectors where TAWSS is low and vice versa.
Conclusion
Overall, the findings of this study support the hypothesis that WSS is involved in human coronary atherosclerosis development at early stage. In detail, it emerges that luminal exposure to high TSVI is associated with PB growth, a hallmark of early atherosclerosis. A clear inverse trend emerges between PB growth and TAWSS. Physically, TSVI quantifies the variability of WSS contraction/expansion action on the endothelium, describing a different hemodynamic stimulus with respect to low TAWSS. This study confirms recent findings on TSVI as biomechanical marker of vascular disease, encouraging further clinical trials for a clinical translation of this concept.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2984939
eng
ispartofbook:Titolo volume non avvalorato
European Symposium on Vascular Biomaterials (ESVB) 2023
numberofpages:4
info:eu-repo/semantics/openAccess
ELETTRONICO
European Society for Vascular Surgery
oai:iris.polito.it:11583/29743642024-03-10T17:36:44Zcom_11583_2614429com_11583_2614425col_11583_2614405
Platform centered reduction: A process capturing the essentials for blade-damper coupled optimization
Gastaldi C.
Gola M.
Gastaldi, C.
Gola, M.
The purpose of this document is to continue along the line of research of the authors in the direction of developing an attractive tool for designers in the initial design phase of the damping of the turbomachinery blades. In particular, in order to guide their initial choice of a dry friction underplatform damper in the most appropriate way. The paper shows how, to this purpose, certain reasonable simplifications are introduced in the procedure and in the model, leaving the customary full high fidelity computations to the final design verification analysis. The key simplifications here considered are: - the blade neck is modelled with Euler beam finite elements so to speed up the updating of its dimensions during the optimisation process; - the contact forces exerted by the dampers on the two sides of the blade platform are represented by the resultant forces and moments applied to a reference point on the platform, associated to its displacements and rotations; - as an improvement to the model proposed in the paper presented at Turbo Expo 2019, the airfoil is now obtained from a full 3D FE model after a component mode synthesis reduction; this choice is justified by the facts that the airfoil is by large the item with most complex shape and that during the coupled optimization of the damper the airfoil is considered to be of fixed shape. It is shown that the process captures the essentials of the nonlinear dynamics of the blade-damper problem without sacrificing in any way the accuracy of the results. This hybrid model is then employed in the process where the domains of optimal matching between the damper and the blade is searched for by exploring the influence of blade neck thickness (flexibility) and damper mass. Such a purposely simplified process allows a clear identification of relationships between relevant blade features and response with a focus on fatigue life. At the same time, it allows an assessment of the interplay between blade parameters and damper parameters in determining the modal features and the damping capabilities. It is shown how different matching solutions may be identified depending on the expected forcing level on the blade.
2020
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2974364
10.1115/GT2020-16317
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85099774777
info:eu-repo/semantics/altIdentifier/isbn/978-0-7918-8423-2
eng
ispartofbook:Proceedings of the ASME Turbo Expo
ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition, GT 2020
volume:11
American Society of Mechanical Engineers (ASME)
oai:iris.polito.it:11583/29743052024-03-23T22:37:33Zcom_11583_2614429com_11583_2614425col_11583_2614405
In-field Data Collection System through Logic BIST for large Automotive Systems-on-Chip
Filipponi, G.
Iaria, G.
Sonza Reorda, M.
Appello, D.
Garozzo, G.
Tancorre, V.
Filipponi, G.
Iaria, G.
Sonza Reorda, M.
Appello, D.
Garozzo, G.
Tancorre, V.
Embedded nano-electronic systems are becoming more prevalent in people's daily lives. As a result, chip and embedded system manufacturing has become increasingly complicated and huge in recent years. Considering safety-critical sectors, such as automotive, it is evident how managing system anomalies and defects becomes vital. Thus, it is necessary to develop and investigate innovative methodologies that can guarantee high reliability despite modern Systems-on-Chip's complexity in critical safety fields. Significant attempts were made to market incredibly reliable microelectronic components. In order to ensure the reliability of the devices, the Automotive field has also started focusing on collecting large amounts of data from car fleets. The data are collected in-field during the life cycle of the devices and create effective feedback for designers and manufacturers. This paper proposes a methodology to store and collect data from key-on and key-off tests performed by Logic BIST for an industrial case study produced by STMicroelectronics.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2974305
10.1109/ITC50671.2022.00090
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85146149511
https://ieeexplore.ieee.org/document/9983872
info:eu-repo/semantics/altIdentifier/wos/WOS:000918580100084
eng
ispartofbook:Titolo volume non avvalorato
2022 IEEE International Test Conference (ITC)
firstpage:646
lastpage:649
numberofpages:4
info:eu-repo/semantics/closedAccess
IEEE
oai:iris.polito.it:11583/29728732024-03-09T08:04:43Zcom_11583_2614429com_11583_2614425col_11583_2614405
Inorganic and Organic-Based Carriers to Vehicle And Release Growth Factors For Bone Regeneration Applications
Federica Banche Niclot
Giorgia Montalbano
Sonia Fiorilli
Chiara Vitale Brovarone
BANCHE NICLOT, Federica
Montalbano, Giorgia
Fiorilli, SONIA LUCIA
VITALE BROVARONE, Chiara
drug delivery
polymeric nanoparticle
mesoporous silica particle
large pore
growth factor
type I collagen
3D printed scaffold
bone
tissue regeneration
2020
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2972873
eng
ispartofbook:Titolo volume non avvalorato
11th World Biomaterials Congress (WBC2020)
info:eu-repo/grantAgreement/EC/H2020/681798-BOOST
info:eu-repo/semantics/openAccess
ELETTRONICO
Wiley
oai:iris.polito.it:11583/29817902024-03-13T22:29:25Zcom_11583_2614429com_11583_2614425col_11583_2614405
A machine learning approach for stride speed estimation based on a head-mounted IMU
Tasca, Paolo
Salis, Francesca
Rosati, Samanta
Balestra, Gabriella
Cereatti, Andrea
Tasca, Paolo
Salis, Francesca
Rosati, Samanta
Balestra, Gabriella
Cereatti, Andrea
machine learning
gait analysi
head IMU
gaussian process regression
Walking speed in real-life conditions is typically
estimated through wearable inertial sensors mounted on waist,
lower limbs, or wrists. Very recently, head-mounted inertial
sensors are emerging for gait assessment. The present study
explores the feasibility of measuring the stride speed with a
head-mounted inertial sensor in both laboratory and real-world
settings. The developed algorithm exploits a Temporal
Convolutional Network for the detection of the gait events and a
Gaussian Process Regression for the stride speed estimation.
The experimental evaluation was carried out on healthy young
participants during both standardised indoor and real-world
walking trials. For indoor trials, errors were smaller than
previous studies (0.05 m/s). As expected, errors increased at
lower speed regimes due to a reduced signals amplitude. During
2.5-hours real-world evaluation, errors were slightly larger but
acceptable (0.1 m/s). Reported results are encouraging and show
the feasibility of estimating gait speed with a single head-worn
inertial sensor.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2981790
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85175821821
info:eu-repo/semantics/altIdentifier/isbn/9788855580113
https://www.dropbox.com/sh/i26pctx38zfsprg/AAChXWM2FOl2tdxs3JWTyiBma/Track 5 - Biomedical Signal and Image Processing?dl=0&preview=GNB_2023_paper_9118.pdf&subfolder_nav_tracking=1
eng
ispartofbook:National Congress of Bioengineering
Eighth National Congress of Bioengineering, GNB
numberofpages:4
serie:GNB Atti
info:eu-repo/semantics/openAccess
ELETTRONICO
Pàtron Editore
country:ITA
place:Bologna
oai:iris.polito.it:11583/29789612023-12-02T23:37:02Zcom_11583_2614429com_11583_2614425col_11583_2614405
Low Cost 3D Printed Pneumatic Linear Actuator
Maffiodo, Daniela
Raparelli, Terenziano
Incardona, Walter
Maffiodo, Daniela
Raparelli, Terenziano
Incardona, Walter
SDG9
Additive Manufacturing
Pneumatic Linear Actuator
3D printing
3D printing has become increasingly widespread in recent years, but a few pneumatic application were developed up to now. A linear pneumatic actuator was designed with the aim of obtaining a low cost actuator, almost completely 3D printed with biological or recyclable material and customized dimensions. Various prototypes were then printed with different materials and printing machines. Experimental tests on three prototype are here presented and compared. A final prototype with low leakage and good performance is finally presented, with PLA cylinder, piston and head and a net force of 40 N at 0,2 MPa of supply pressure.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2978961
10.1007/978-3-031-32439-0_26
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85161163529
info:eu-repo/semantics/altIdentifier/isbn/978-3-031-32438-3
info:eu-repo/semantics/altIdentifier/isbn/978-3-031-32439-0
https://link.springer.com/book/10.1007/978-3-031-32439-0
eng
ispartofbook:Proceedings of I4SDG Workshop 2023
2nd IFToMM Workshop for Sustainable Development Goals, I4SDG 2023
volume:134
firstpage:225
lastpage:232
numberofpages:8
serie:MECHANISMS AND MACHINE SCIENCE
info:eu-repo/semantics/embargoedAccess
Springer Nature Switzerland
place:Berlino
oai:iris.polito.it:11583/29798692024-03-09T07:08:07Zcom_11583_2614429com_11583_2614425col_11583_2614405
Forced Ignition Study Based on Wavelet Method
MARTELLI, Emanuele
VALORANI M
PAOLUCCI S
ZIKOSKI Z.
Martelli, Emanuele
Valorani, M
Paolucci, S
Zikoski, Z.
2011
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2979869
info:eu-repo/semantics/altIdentifier/isbn/978-92-9221-256-8
eng
ispartofbook:Proceedings of the 7th European Symposium on Aerothermodynamics for Space Vehicles, NOORDWIJK: ESA Publications Division
7th Symposium on Aerothermodynamics for Space Vehicles
ESA
oai:iris.polito.it:11583/29797682024-03-09T07:31:43Zcom_11583_2614429com_11583_2614425col_11583_2614405
Simulating the operation of new-generation freight-EMUs for high-speed lines: perspectives for more reliable, sustainable, and fast logistics
Gurri', S.
Bocchieri, M.
Galasso
V. Operti
Dalla Chiara, B.
Gurri', S.
Bocchieri, M.
Galasso, Daniela
Operti, V.
Dalla Chiara, B.
railway operation
simulation
freight train
high speed
scheduling
functional design
This paper aims at establishing the most appropriate maximum cruising speed for a freight electric multiple unit (F-EMU), i.e., a concept of a new-generation freight train with distributed power, diagnosable, and able to run on high-speed lines. Different scenarios were simulated on the Turin-Verona line, all considering 5 subsequent trains departing after the end of the passenger service and arriving before the scheduled night-time maintenance operations on the infrastructure. The scenarios considered the current signalling system (SCMT+ERTMS level 2) and ETCS level 3 with train- platooning. It has been shown that, because of the limitations due to the tarpaulin resistance of swap bodies loaded on the flat wagons, the most convenient speed for the design of these trains is 160 km/h, being the best compromise for line capacity and timetable robustness. Moreover, given the homotachic nature of the foreseen scenarios, train-platooning would be a viable solution for reducing delays and having a more reliable service.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2979768
10.4203/ccc.1.11.1
https://www.ctresources.info/ccc/download/ccc.9580.pdf
eng
ispartofbook:Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance
Fifth International Conference on Railway Technology: Research, Development and Maintenance
volume:1
firstpage:1
lastpage:8
numberofpages:8
journal:Civil-Comp Conferences
info:eu-repo/semantics/openAccess
ELETTRONICO
Civil-Comp Press
country:GBR
place:Edinburgh
oai:iris.polito.it:11583/29828082024-03-21T20:24:32Zcom_11583_2614429com_11583_2614425col_11583_2614405
SCI-FI: a Smart, aCcurate and unIntrusive Fault-Injector for Deep Neural Networks
Gavarini, G
Ruospo, A
Sanchez, E
Gavarini, G
Ruospo, A
Sanchez, E
Deep Neural Network
Reliability
Speed-Up
Fault Injection
Fault Injector
In recent years, the reliability of Deep Neural Networks (DNN) has become the focus of an increasing number of research activities. In particular, researchers have focused on understanding how a DNN behaves when the underlying hardware is affected by a fault. This is a challenging task: slight changes in a network architecture can significantly impact how the network reacts to faults. There are several approaches to simulate the behaviour of a faulty network: the most accurate one is to perform low-level fault simulations. Nonetheless, this task is very time-consuming and costly to be implemented. Even though the injection time can be reduced by injecting faults at the application level, for sufficiently large networks, this time is still very high, requiring weeks to complete a single simulation. This work aims at providing a fast and accurate solution for injecting software-level faults in a DNN that is independent of its architecture and does not require any modification to its structure. For this reason, this paper introduces SCI-FI, a Smart, aCcurate and unIntrusive Fault-Injector. SCI-FI smartly reduces the fault injection time required for a complete fault simulation of the network by taking advantage of two fundamental mechanisms: Fault Dropping and Delayed Start. Experimental results from various ResNet, DenseNet and EfficientNet architectures targeting the CIFAR-10 and ImageNet datasets show that combining these techniques drastically reduces the simulation time, which can last up to 70% less.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2982808
10.1109/ETS56758.2023.10173957
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85161892893
info:eu-repo/semantics/altIdentifier/isbn/979-8-3503-3634-4
https://ieeexplore.ieee.org/document/10173957
info:eu-repo/semantics/altIdentifier/wos/WOS:001032757100007
eng
ispartofbook:2023 IEEE European Test Symposium (ETS)
2023 IEEE European Test Symposium (ETS)
firstpage:1
lastpage:6
numberofpages:6
info:eu-repo/semantics/closedAccess
IEEE
country:USA
place:New York, NY
oai:iris.polito.it:11583/29763482024-03-09T07:04:37Zcom_11583_2614429com_11583_2614425col_11583_2614405
L’edonismo sostenibile: la progettazione consapevole del futuro, Hedonistic Sustainability: conscious design of the future
Garda, Emilia
Rabbia, Aurora
Garda, Emilia
Rabbia, Aurora
Hedonistic sustainability, Bjarke Ingels, environment, green architecture
Contemporary architecture needs to take a step forward in order to respond to the environmental degradation. A whole revolution at the expense of the human being, as it is obvious in these last few years, appears futile and unenforceable. For these reasons, a new approach that considers human and environment at the same level of importance is fundamental: here is where hedonistic sustainability takes over. This discipline blends environment protection with a possible lifestyle, which does not represent a hymn to renunciation. The hedonistic sustainability concept criticizes the idea of sustainability that societies are adopting right now, because it is the same as forcing the human being to stop consuming, which it is ultimately impracticable. As a consequence, there must be a bilateral process that considers both human beings and the environment. This paper explains how this new vision can be the most efficient solution to fight climate change; although it can be used in every aspect of our everyday life, this approach works properly for the construction sector which includes architecture, engineering and design. Hedonistic sustainability strongly relies on sustainable projects, fun activities and a warm sense of community. Bjarke Ingles’ projects are the clearest examples of it, blending modern structures with green areas and public spots.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2976348
info:eu-repo/semantics/altIdentifier/isbn/978-88-492-4558-5
ita
ispartofbook:2030 d.c. Proiezioni future per una progettazione sostenibile
2030 d.c. Proiezioni future per una progettazione sostenibile, Atti del Convegno Messina 2022
firstpage:849
lastpage:858
numberofpages:10
info:eu-repo/semantics/closedAccess
STAMPA
Gangemi
country:ITA
place:Roma
oai:iris.polito.it:11583/29796952024-03-17T02:56:47Zcom_11583_2614429com_11583_2614425col_11583_2614405
Detecting anatomical characteristics of single motor units by combining high density electromyography and ultrafast ultrasound: a simulation study
Carbonaro M.
Zaccardi S.
Seoni S.
Meiburger K. M.
Botter A.
Carbonaro, M.
Zaccardi, S.
Seoni, S.
Meiburger, K. M.
Botter, A.
Computer Simulation
Electromyography
Motor Neuron
Muscle Contraction
Ultrasonography
Muscle force production is the result of a sequence of electromechanical events that translate the neural drive issued to the motor units (MUs) into tensile forces on the tendon. Current technology allows this phenomenon to be investigated non-invasively. Single MU excitation and its mechanical response can be studied through high-density surface electromyography (HDsEMG) and ultrafast ultrasound (US) imaging respectively. In this study, we propose a method to integrate these two techniques to identify anatomical characteristics of single MUs. Specifically, we tested two algorithms, combining the tissue velocity sequence (TVS, obtained from ultrafast US images), and the MU firings (extracted from HDsEMG decomposition). The first is the Spike Triggered Averaging (STA) of the TVS based on the occurrences of individual MU firings, while the second relies on the correlation between the MU firing patterns and the TVS spatio-temporal independent components (STICA). A simulation model of the muscle contraction was adapted to test the algorithms at different degrees of neural excitation (number of active MUs) and MU synchronization. The performances of the two algorithms were quantified through the comparison between the simulated and the estimated characteristics of MU territories (size, location). Results show that both approaches are negatively affected by the number of active MU and synchronization levels. However, STICA provides a more robust MU territory estimation, outperforming STA in all the tested conditions. Our results suggest that spatio-temporal independent component decomposition of TVS is a suitable approach for anatomical and mechanical characterization of single MUs using a combined HDsEMG and ultrafast US approach.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2979695
10.1109/EMBC48229.2022.9871578
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85138128749
info:eu-repo/semantics/altIdentifier/isbn/978-1-7281-2782-8
https://ieeexplore.ieee.org/document/9871578
eng
ispartofbook:Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
44th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2022
volume:2022
firstpage:748
lastpage:751
numberofpages:4
serie:IEEE ENGINEERING IN MEDICINE AND BIOLOGY ... ANNUAL CONFERENCE PROCEEDINGS
info:eu-repo/semantics/openAccess
ELETTRONICO
Institute of Electrical and Electronics Engineers Inc.
oai:iris.polito.it:11583/29735642023-12-20T00:18:28Zcom_11583_2614429com_11583_2614425col_11583_2614405
Influence of the Lamination Material and Rotor Pole Geometry on the Performance of Wound Field Synchronous Machines
Biasion, Marco
Kowal, Damian
Moghaddam, Reza Rajabi
Pastorelli, Michele
Biasion, Marco
Kowal, Damian
Moghaddam, Reza Rajabi
Pastorelli, Michele
Electrical machine
wound field synchronous machine
magnetic material
electrical steel sheet
silicon-iron
core losse
refinement of machine dimension
machine design
This paper examines the influence of the lamination
material and rotor pole geometry on the steady-state performance
of a wound field synchronous machine operated in the generating
mode. The investigations are carried out through 2D finite element
analyses using a commercial software package. Non-Oriented
silicon-iron alloys of various grades are selected to recognize the
impact of their magnetic properties on the machine performance.
Different methods for the extrapolation of BH curves from low medium field levels to saturation are reviewed and compared.
The effect of using different materials on both the rotor and the
stator core is assessed in terms of variation of the air gap power,
the torque ripple and the core losses. The performance of a new
machine featuring a higher-grade lamination material and a
refined rotor pole geometry are compared at constant air gap
power with those of the reference machine.
The results show that, depending on the adopted strategy, it is
possible to almost halve the torque ripple and slightly decrease the
mass of the rotor core.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2973564
10.1109/ECCE50734.2022.9948038
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85144091187
info:eu-repo/semantics/altIdentifier/isbn/978-1-7281-9387-8
https://ieeexplore.ieee.org/document/9948038
info:eu-repo/semantics/altIdentifier/wos/WOS:001080548004084
eng
ispartofbook:2022 IEEE Energy Conversion Congress and Exposition (ECCE)
2022 IEEE Energy Conversion Congress and Exposition (ECCE)
firstpage:1
lastpage:8
numberofpages:8
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29790792024-01-27T00:55:07Zcom_11583_2614429com_11583_2614425col_11583_2614405
Territorial Ecosystem for circular economies: Eco3R research project
Guido, Callegari
Guglielmo, Ricciardi
Giuseppe, Roccasalva
Paolo, Simeone
Callegari, Guido
Ricciardi, Guglielmo
Roccasalva, Giuseppe
Simeone, Paolo
Circular economy
Circular ecosystem
Material flow
GIS analysis
Among the transitional processes that could lead to building consistent sustainable solutions, circular economies practices (CE) are complex processes which must take into account diff erent topics such as stakeholder engagement, material fl ows opportunities, end of life expectations and EU limit perspectives or targets.
This paper introduces briefl y the concept of circular territorial ecosystems with respect to the Eco3r research project, carried on by the Politecnico of Turin (DAD) from 2020, in collaboration with CCS, the in-house providing company of 19 municipalities in the area of Turin. Some crucial data on waste management and the main project’s targets are presented. Some Eco3r projects’ outputs are outlined in order to show this local experiment can become a model to scale or replicate in other communities in Europe.
The paper is structured as follows: Section 1 describes the background problem with main data and critical issues regarding the case study; Section 2 is describing the target of the research project Eco3R and the scientifi c approach adopted; Section 3 is dedicated on the main output of Eco3R project and the discussion on the further research developments.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2979079
info:eu-repo/semantics/altIdentifier/isbn/9791259530462
eng
ispartofbook:Recycling. Atti del V Convegno Internazionale Il valore della materia nella transizione ecologica del settore delle costruzioni
Recycling.Il valore della materia nella transizione ecologica del settore delle costruzioni V Convegno Internazionale
firstpage:174
lastpage:183
numberofpages:10
info:eu-repo/semantics/openAccess
ELETTRONICO
Anteferma
country:ITA
place:Conegliano, TV
oai:iris.polito.it:11583/29739222023-12-20T00:18:31Zcom_11583_2614429com_11583_2614425col_11583_2614405
Simplified Thermal Model of Disk-Shaped Automotive Smart Braking Actuators
Graffeo, Federica
Vaschetto, Silvio
Miotto, Alessio
Carbone, Fabio
Tenconi, Alberto
Agamloh, Emmanuel
Cavagnino, Andrea
Graffeo, Federica
Vaschetto, Silvio
Miotto, Alessio
Carbone, Fabio
Tenconi, Alberto
Agamloh, Emmanuel
Cavagnino, Andrea
PM synchronous machine
thermal model
brake-by-wire actuator
lumped-parameters thermal network (LPTN)
phase-split LPTN
aspect ratio
This paper articulates the challenges in the thermal modelling of surface-mounted permanent magnet motors for automotive brake-by-wire systems, which operate by injecting high dc currents in two of the three phases for short time intervals. This unconventional operation requires dedicated thermal models for the prediction of uneven heat distributions inside the machine. This study extends a previous work conducted on slender-shaped motors to a disk-shaped machine where the edge effects could compromise the model accuracy. Additionally, here efforts have been made to minimize the number of experimental tests needed for the correct calibration of the proposed phase-split lumped-parameters thermal models.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2973922
10.1109/ECCE50734.2022.9947428
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85144057211
info:eu-repo/semantics/altIdentifier/isbn/978-1-7281-9387-8
https://ieeexplore.ieee.org/document/9947428
info:eu-repo/semantics/altIdentifier/wos/WOS:001080548000068
eng
ispartofbook:2022 IEEE Energy Conversion Congress and Exposition (ECCE)
2022 IEEE Energy Conversion Congress and Exposition (ECCE)
firstpage:1
lastpage:8
numberofpages:8
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
place:Piscataway
oai:iris.polito.it:11583/29832192024-03-06T04:26:16Zcom_11583_2614429com_11583_2614425col_11583_2614405
Patrimonio naturale e culturale, tangibile e intangibile: quale gestione? Il caso dei Sacri Monti
Cassatella, Claudia
Cassatella, Claudia
UNESCO, patrimonio paesaggistico, tutela del paesaggio, Sacro Monte d'Orta
Il sito seriale UNESCO dei Sacri Monti rappresenta una formidabile sintesi di diversi tipi di patrimonio. Il contributo evidenzia come l’approccio paesaggistico consenta di apprezzarne l’integrazione e quindi migliorare la valorizzazione. Il caso di Orta, oggetto di studi da parte del Politecnico di Torino, offre un esempio di metodo e di esiti.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2983219
info:eu-repo/semantics/altIdentifier/isbn/978-88-31368-09-4
ita
ispartofbook:Educare alla valorizzazione dei Siti UNESCO a partire dalle Residenze Sabaude. Atti del percorso formativo 2022-2023
Educare alla valorizzazione dei Siti UNESCO a partire dalle Residenze Sabaude
volume:126
firstpage:128
lastpage:130
numberofpages:3
info:eu-repo/semantics/openAccess
ELETTRONICO
Centro per l'UNESCO di Torino
country:ITA
place:Torino
oai:iris.polito.it:11583/29829402024-03-17T22:43:28Zcom_11583_2614429com_11583_2614425col_11583_2614405
A Model for Automated Cybersecurity Threat Remediation and Sharing
Settanni, F
Regano, L
Basile, C
Lioy, A
Settanni, F
Regano, L
Basile, C
Lioy, A
Network Functions Virtualization
Automated Risk Remediation
Threat Sharing
This paper presents an approach to the automatic remediation of threats reported by Cyber Threat Intelligence. Remediation strategies, named Recipes, are expressed in a close-to-natural language for easy validation. Thanks to the developed models, they are interpreted, contextualized, and then translated into CACAO Security playbooks, a standard format ready for automatic enforcement, without human intervention. The presented approach also allows sharing of remediation procedures on threat-sharing platforms (e.g. MISP) which improves the overall security posture. The effectiveness of the approach has been tested in the context of two EC-funded projects.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2982940
10.1109/NetSoft57336.2023.10175486
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85166486533
info:eu-repo/semantics/altIdentifier/isbn/979-8-3503-9980-6
https://ieeexplore.ieee.org/document/10175486
info:eu-repo/semantics/altIdentifier/wos/WOS:001032763600083
eng
ispartofbook:NetSoft-2023 - 9th IEEE International Conference on Network Softwarization
2023 IEEE 9th International Conference on Network Softwarization (NetSoft)
firstpage:492
lastpage:497
numberofpages:6
info:eu-repo/semantics/openAccess
STAMPA
IEEE
oai:iris.polito.it:11583/29733332024-03-23T00:50:50Zcom_11583_2614429com_11583_2614425col_11583_2614405
On a Fast Solution Strategy for a Surface-Wire Integral Formulation of the Anisotropic Forward Problem in Electroencephalography
Baronio C.
Cosentino G.
Ricci P.
Henry C.
Monin M. Y.
Merlini A.
Andriulli F. P.
Baronio, C.
Cosentino, G.
Ricci, P.
Henry, C.
Monin, M. Y.
Merlini, A.
Andriulli, F. P.
Electric potential
Adaptation model
Conference
Biological system modeling
Wire
Integral equation
Brain modeling
This work focuses on a quasi-linear-in-complexity strategy for a hybrid surface-wire integral equation solver for the electroencephalography forward problem. The scheme exploits a block diagonally dominant structure of the wire self block— that models the neuronal fibers self interactions—and of the surface self block—modeling interface potentials. This structure leads to two Neumann iteration schemes further accelerated with adaptive integral methods. The resulting algorithm is linear up to logarithmic factors. Numerical results confirm the performance of the method in biomedically relevant scenarios.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2973333
10.1109/AP-S/USNC-URSI47032.2022.9886398
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85139754213
info:eu-repo/semantics/altIdentifier/isbn/978-1-6654-9658-2
https://ieeexplore.ieee.org/document/9886398
eng
ispartofbook:2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)
2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)
firstpage:505
lastpage:506
numberofpages:2
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29828612024-03-13T20:27:55Zcom_11583_2614429com_11583_2614425col_11583_2614405
Deep Learning Technique to Identify Abrupt Movements in Human-Robot Collaboration
Polito M.
Digo E.
Pastorelli S.
Gastaldi L.
Polito, M.
Digo, E.
Pastorelli, S.
Gastaldi, L.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2982861
10.1007/978-3-031-32439-0_9
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85161215314
info:eu-repo/semantics/altIdentifier/isbn/978-3-031-32438-3
info:eu-repo/semantics/altIdentifier/isbn/978-3-031-32439-0
eng
ispartofbook:Proceedings of I4SDG Workshop 2023
International Workshop IFToMM for Sustainable Development Goals
volume:134 MMS
firstpage:73
lastpage:80
numberofpages:8
info:eu-repo/semantics/closedAccess
Springer
oai:iris.polito.it:11583/29845262024-03-17T01:49:10Zcom_11583_2614429com_11583_2614425col_11583_2614405
Audio-Based Identification of Queen Bee Presence Inside Beehives
Barbisan, Luca
Turvani, Giovanna
Fabrizio, Riente
Barbisan, Luca
Turvani, Giovanna
Riente, Fabrizio
Beehive monitoring
Audio identification
Beehive state
Honeybees are essential for the health of people and the planet. They play a key role in the pollination of most crops. The high mortality observed in the last decade, caused by stress factors among which the climate change, have raised the necessity of remote sensing the beehives to help monitor the health of honeybees and better understand this phenomenon. Several solutions have been proposed in the literature, and some of them include the analysis of in-hive sounds. In this scenario, we explore the potential of machine learning methods for queen bee detection using only the audio signal, being a good indicator of the colony state of health. In particular, we experiment support vector machines and neural network classifiers. We consider the effect of varying the audio chunk duration and the adoption of different hyperparameters.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2984526
10.1109/CAFE58535.2023.10291679
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85178638514
info:eu-repo/semantics/altIdentifier/isbn/979-8-3503-2711-3
https://ieeexplore.ieee.org/document/10291679
eng
ispartofbook:IEEE Conference on Agrifood Electronics
IEEE Conference on Agrifood Electronics
firstpage:70
lastpage:74
numberofpages:5
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29772792024-03-10T17:32:36Zcom_11583_2614429com_11583_2614425col_11583_2614405
Strangeness instabilities in relativistic heavy-ion collisions
Lavagno A.
Lavagno, A.
In this investigation we are going to show that, similarly to the low density nuclear liquid-gas phase transition, thermodynamic instabilities and, consequently, a pure hadronic phase transition can occur in regime of high temperature and dense baryon matter. The analysis is performed by means of an effective relativistic mean-field model with the inclusion of hyperons, Δ-isobars, and the lightest pseudoscalar and vector meson degrees of freedom. The Gibbs conditions on the global conservation of baryon number and zero net strangeness in symmetric nuclear matter are required.
It turns out that a continuous phase transition takes place with two phases at the same baryon and strangeness chemical potentials but with a different content of baryon and strangeness density, altering significantly the baryon-antibaryon and meson-antimeson ratios. Such a physical regime could be in principle investigated in the high-energy compressed nuclear matter experiments where it is possible to create compressed baryonic matter with a high net baryon density.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2977279
10.22323/1.414.1030
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85149991212
eng
ispartofbook:Proceedings of Science, 41st International Conference on High Energy Physics, ICHEP 2022
41st International Conference on High Energy Physics, ICHEP 2022
volume:414
firstpage:1030-1
lastpage:1030-4
numberofpages:4
journal:POS PROCEEDINGS OF SCIENCE
info:eu-repo/semantics/openAccess
ELETTRONICO
PoS
oai:iris.polito.it:11583/29830132024-03-06T04:11:01Zcom_11583_2614429com_11583_2614425col_11583_2614405
Preliminary tests aimed at the recycling of Lithium Iron Phosphate (LFP) cathodes
Martina Bruno
Carlotta Francia
Silvia Fiore
Bruno, Martina
Francia, Carlotta
Fiore, Silvia
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2983013
eng
ispartofbook:Proceedings
CHANIA2023 10th International Conference on Sustainable Waste Management
info:eu-repo/semantics/openAccess
ELETTRONICO
Chania 2023
country:GRC
oai:iris.polito.it:11583/29821942024-03-22T01:54:09Zcom_11583_2614429com_11583_2614425col_11583_2614405
Designing hand-held controller-based handshake interaction in social VR and Metaverse
Filippo Gabriele Pratticò
Irene Checo
Alessandro Visconti
Adalberto Simeone
Fabrizio Lamberti
Prattico', FILIPPO GABRIELE
Checo, Irene
Visconti, Alessandro
Simeone, Adalberto
Lamberti, Fabrizio
Non-verbal communication
handshaking
virtual environments
This work presents four possible designs for the handshake interaction in a Social VR-like virtual environment in which the user operates using hand-held controllers: a first design based on a graphics user interface (GUI), a second design leveraging a physical button on hand-held controllers, and two designs based on recreating the handshaking gesture by grabbing the other party’s hand and shaking it. The four designs were evaluated and compared through a user study which involved 24 participants, analyzing factors pertaining to embodiment, presence and social presence, usability, and handshake quality of experience. Results indicated that the gesture-based design was preferred, overall.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2982194
10.1145/3623264.3624464
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85177661690
info:eu-repo/semantics/altIdentifier/isbn/979-8-4007-0393-5
https://dl.acm.org/doi/10.1145/3623264.3624464
info:eu-repo/semantics/altIdentifier/wos/WOS:001141202600018
eng
ispartofbook:Proc. 16th ACM SIGGRAPH Conference on Motion, Interaction and Games (ACM MiG 2023)
16th ACM SIGGRAPH Conference on Motion, Interaction and Games (ACM MiG 2023)
firstpage:1
lastpage:6
numberofpages:6
info:eu-repo/semantics/openAccess
ELETTRONICO
ACM
oai:iris.polito.it:11583/29735032024-03-08T07:48:37Zcom_11583_2614429com_11583_2614425col_11583_2614405
Patrimonio vernacolare come sapere comunitario. Il processo progettuale ed il riconoscimento comune di patrimonio
Gugliotta, Rossella
Gugliotta, Rossella
vernacolare
Africa subsahariana
processo
Nello studio dei processi progettuali dell’architetto in Africa subsahariana è emerso quanto la questione del patrimonio come tradizione sia un elemento discriminante del progetto. Molti sono i progettisti che occupandosi di interventi all’interno della regione si rifanno a pratiche e modelli tradizionali per avviare un dialogo con la comunità ed il suo paesaggio locale. Il termine vernacolare come costruzione culturale costituisce materia di studio per la lettura del contesto da parte degli europei, ma allo stesso tempo è oggetto di una negazione da parte delle comunità locali. Infatti, nel contesto africano, la colonizzazione di tipo culturale ha portato ad un falso mito del moderno che all’interno del progetto architettonico si è espresso attraverso un astio verso il tradizionale da parte delle comunità portando ad una negazione culturale della stessa. Il vernacolare si interfaccia vicendevolmente con una visione dinamica dello concetto stesso che porta le popolazioni locali ad interfacciarsi con la globalità e una visione principalmente statica portata avanti da progetti stranieri nel continente. All’interno di questo panorama ci si chiede in che modo il progetto possa portare al superamento di un modello non più riconosciuto. Come il progetto all’interno di un dibattito molto più ampio può portare nuovamente la comunità all’accettazione dei valori condivisi dal vernacolare? Che ruolo può svolgere il processo progettuale all’interno del riconoscimento comune del patrimonio? Il processo in sé può diventare un veicolo di rinnovamento dell’immaginario vernacolare? L’indagine si muove con lo scopo di identificare uno scambio vicendevole di valori con la comunità a alla ricerca di un terreno comune di dialogo.
2019
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2973503
info:eu-repo/semantics/altIdentifier/isbn/978-88-909054-9-0
ita
ispartofbook:Il Progetto di Architettura come intersezione di saperi. Per una nozione rinnovata di Patrimonio
Il Progetto di Architettura come intersezione di saperi. Per una nozione rinnovata di Patrimonio
firstpage:1790
lastpage:1793
numberofpages:4
info:eu-repo/semantics/closedAccess
ELETTRONICO
ProArch
oai:iris.polito.it:11583/29716482024-03-23T02:17:23Zcom_11583_2614429com_11583_2614425col_11583_2614405
Optimal element-wise distributions of structural theories from neural networks
E. Carrera
M. Petrolo
Carrera, E.
Petrolo, M.
Node-Dependent Kinematics, Finite Elements, Structural Theories, CUF, Neural Networks
This paper presents a novel approach to developing refined structural theories for finite element models. The proposed methodology stems from the synergistic use of various methods. First, refined structural theories are built using the Carrera Unified Formulation, and 2D finite elements are used. Each element can be assigned a different structural theory through the Node-Dependent Kinematics approach. The axiomatic/asymptotic method is used to evaluate the accuracy of each structural theory distribution over a numerical mesh. Finally, neural networks are employed to obtain surrogate models, find optimal distributions of theories, and minimize computational costs. The numerical results consider free vibrations of composite shells with various stacking sequences and thickness ratios. Such input parameters are included as features of the surrogate models to avoid lengthy finite element simulations. The use of the proposed methodology provides guidelines on the proper modelling by indicating the areas of the structure in which refined models are most needed. Furthermore, the adoption of neural networks leads to significant reductions in computational overheads.
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2971648
eng
ispartofbook:Proceedings of the The Fourteenth International Conference on Computational Structures Technology
The Fourteenth International Conference on Computational Structures Technology
numberofpages:5
info:eu-repo/semantics/closedAccess
ELETTRONICO
Elsevier
oai:iris.polito.it:11583/29772352024-03-12T18:06:40Zcom_11583_2614429com_11583_2614425col_11583_2614405
Evaluating Positive Energy Districts: A Literature Review
Binda T.
Bottero M.
Bisello A.
Binda, T.
Bottero, M.
Bisello, A.
Economic analysi
Economic assessment
Economic evaluation
Economic valuation
Energy district
Positive energy district
To achieve the climate goals in the Paris Agreement and clean energy transition, positive energy districts must be promoted. A positive energy district is focused on increasing the efficiency of the buildings within it, using the renewable energy it produces, favouring electric and hybrid cars, and storing all the energy produced, in order to make clean energy for the whole city. Positive energy is a concept that takes into account not only the energy aspect, but also the environmental, social, and economic sphere. In order to be effective, this transformation requires the intervention of the community and the local decision-makers. The aim of the paper is to investigate the scientific literature, through the scientific dataset SCOPUS, in order to develop an evaluation framework for energy transition to support the decision-makers. Since the positive energy district is a recent paradigm, the investigation is extended to consider energy fields and takes into account different levels of urban scale. Specific keywords are used in order to find different economic methods in the literature, which can be used to support positive energy transition
2022
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2977235
10.1007/978-3-031-06825-6_170
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85138642257
info:eu-repo/semantics/altIdentifier/isbn/978-3-031-06824-9
info:eu-repo/semantics/altIdentifier/isbn/978-3-031-06825-6
ispartofbook:5th International Symposium on New Metropolitan Perspectives
NMP 2022
volume:482 LNNS
firstpage:1762
lastpage:1770
numberofpages:9
info:eu-repo/semantics/closedAccess
Springer
country:DEU
place:Berlino
oai:iris.polito.it:11583/29863522024-03-03T07:56:13Zcom_11583_2614429com_11583_2614425col_11583_2614405
Blast-induced Progressive Collapse: Threat-independent or Threat-dependent Approach?
Kiakojouri, Foad
Jahedi Delivand, A
Sheidaii, M. R.
Kiakojouri, Foad
Jahedi Delivand, A
Sheidaii, M. R.
Progressive collapse
Dynamic Analysi
Blast
Alternate load path
Steel moment-resisting frame
In this study, blast-induced progressive collapse potential is assessed in a 5-story steel
moment-resisting frame. Both threat-independent and threat-dependent approaches are
considered in this paper. For this purpose, first the frame was analyzed in different threatindependent column removal scenarios using alternate load path method. Then, the model
structure is analyzed under different simultaneous blast and column removal scenarios.
Affecting parameters such as location of explosive charge, location of initial failure and
number of spans are included in numerical modeling. According to results, progressive
collapse potential depends meaningfully to column removal approach; threat-dependent
approach provides larger structural response. The obtained results provide better insight
into the dynamic column removal in blast-loaded framed structures.
2016
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2986352
eng
ispartofbook:Titolo volume non avvalorato
4th International Congress on Civil Engineering, Architecture and Urban Development
numberofpages:11
info:eu-repo/semantics/closedAccess
Shahid Beheshti University
oai:iris.polito.it:11583/29780022024-03-17T21:54:49Zcom_11583_2614429com_11583_2614425col_11583_2614405
PyXEL: Exploring Bitstream Analysis to Assess and Enhance the Robustness of Designs on FPGAs
Corrado De Sio
Sarah Azimi
Luca Sterpone
David Merodio Codinachs
Filomena Decuzzi
DE SIO, Corrado
Azimi, Sarah
Sterpone, Luca
Merodio Codinachs, David
Decuzzi, Filomena
Fault Injection
FPGA
Reliability
Robustness
Commercial hardware-reconfigurable systems-on-chip are highly attractive for mission-critical applications in the space and automotive industries. However, their vulnerability to soft errors is a major concern, and analyzing the robustness of these systems is a complex task due to the lack of dedicated tools, information, and methodologies available. PyXEL is a tool designed to address these issues, providing the methodology for automating reliability analysis based on radiation and fault injection campaigns and facilitating the development of mitigation solutions based on customized place-and-route. Furthermore, PyXEL offers the methodology for visualizing, decoding, and analyzing the configuration data of programmable hardware devices, enabling more precise and efficient evaluation and analysis of the robustness of systems implemented on programmable hardware devices.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2978002
10.1109/SMACD58065.2023.10192116
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85168674544
info:eu-repo/semantics/altIdentifier/isbn/979-8-3503-3265-0
https://ieeexplore.ieee.org/document/10192116
eng
ispartofbook:2023 19th International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD)
International Conference on Synthesis, Modeling, Analysis and Simulation Methods, and Applications to Circuit Design (SMACD)
numberofpages:4
info:eu-repo/semantics/openAccess
IEEE
oai:iris.polito.it:11583/29830702024-03-07T04:05:18Zcom_11583_2614429com_11583_2614425col_11583_2614405
Hypogeal fauna of the military subterranean fortification Forte di Vernante Opera 11 "Tetto Ruinas" (Piedmont, Italy)
Lana Enrico
Balestra Valentina
Chesta Michelangelo
Olivero Dario
Lana, Enrico
Balestra, Valentina
Chesta, Michelangelo
Olivero, Dario
subterranean biology
artificial cavitie
war work
The military subterranean fortification Forte di Vernante Opera 11 "Tetto Ruinas" is not mentioned in the extensive specific literature about the underground fortifications of the NW Alps. Only the project in the Military Engineers Corps archives is known, however, the schematic survey recently detected by our research association Biologia Sotterranea Piemonte – Gruppo di Ricerca highlights differences from the original map. On the contrary, biological research and scientific literature about the hypogeal fauna carried out in this artificial cavity are numerous.
Two new species of spiders with remarkable adaptations to the underground environment were discovered by Angelo Morisi (1943-2016): the Linyphiidae Troglohyphantes konradi Brignoli, 1975 and the Nesticidae Typhlonesticus morisii (Brignoli, 1975). Subsequently, other spiders adapted to this particular environment were observed too, such as Kryptonesticus eremita (Simon, 1880) and Leptoneta crypticola Simon, 1907. Other spiders with less evident adaptations were observed in this artificial cavity such as Tegenaria silvestris L. Koch, 1872, Pimoa rupicola (Simon, 1884), Meta menardi (Latreille, 1804), Metellina merianae (Scopoli, 1763).
Terrestrial Crustacean Isopods adapted to underground environment are present in this fort: Buddelundiella zimmeri Verhoeff, 1930 and Trichoniscus voltai Arcangeli, 1948.
Among the Miriapods were observed the Chilopoda Eupolybothrus longicornis (Risso, 1826) and Lithobius microps Meinert, 1868, and the Diplopoda Plectogona vignai draco (Strasser, 1975), very specialized subspecies organism, and the larger and less adapted Callipus foetidissimus (Savi, 1819).
The troglophile grasshopper Dolichopoda azami Saulcy, 1893 is very common in the cavity.
Of considerable interest are the anophthalmous Trechini Carabidae Duvalius carantii (Sella, 1874), and the very rare insect Staphylinidae Blepharhymenus mirandus Fauvel, 1899.
Sometimes at the entrances it is possible to observe the cave salamander Speleomantes strinatii (Aellen, 1958).
The association Biologia Sotterranea Piemonte – Gruppo di Ricerca deals mainly the study of subterranean species and environments and their conservations. Our last twenty years research in this subterranean military cavity have allowed to observe and monitor the presence of all the aforementioned organisms and to document the presence of numerous other ones. Our studies in this and other Piedmontese artificial cavities highlights the presence of numerous species extremely adapted to the hypogeal environment, reiterating the importance of the subterranean fauna monitoring in the artificial cavities too, and of the presence of these organisms due to some biotic and abiotic environmental factors, regardless of the natural or artificial origin of the cavity.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2983070
info:eu-repo/semantics/altIdentifier/isbn/978 88 32241 32 7
https://hypogea2023.it/programma/atti/
eng
ispartofbook:Proceedings of IV International Congress of Speleology in Artificial Cavities
Genova Hypogea 2023
firstpage:401
lastpage:408
numberofpages:8
info:eu-repo/semantics/openAccess
ELETTRONICO
Centro Studi Sotterranei
oai:iris.polito.it:11583/29745002024-03-13T22:35:22Zcom_11583_2614429com_11583_2614425col_11583_2614405
The relict landslide in bimsoils in downtown Genova, Italy: a new modeling approach
Napoli M. L.
Barbero M.
Minuto D.
Morandi L.
Ullah H.
Napoli, M. L.
Barbero, M.
Minuto, D.
Morandi, L.
Ullah, H.
Stability problems occurring in geological units with a block-in-matrix fabric are often analyzed with deterministic approaches and/or assuming block-in-matrix rocks/soils (bimrocks or bimsoils) to be homogeneous equivalent geomaterials. However, recent studies have demonstrated that since these formations are characterized by a great (dimensional, spatial and lithological) variability, reliable results can only be obtained if a stochastic approach accounting for different block arrangements and dimensions is used.
This paper extends and improves a previous study from Minuto and Morandi (2015) to evaluate the stability of a relict landslide in bimsoil located in downtown Genova (Italy), where a deterministic approach and the traditional limit equilibrium method were used. In this work,
different slope models with elliptical blocks of variable eccentricity, size and positions are generated by means of a stochastic approach and are analyzed with the FEM code RS2. Moreover, since the slope can be considered to be a bimsoil, interfaces between the blocks and matrix are introduced in order to better simulate the lower strength at the block/matrix contacts.
The numerical analyses of the slope reveal that shallow failure surfaces have a higher probability
of occurrence as compared to the deep failure surfaces considered by Minuto and Morandi
(2015). Furthermore, lower safety factors are obtained when a block-matrix interface strength
smaller than that of the matrix (i.e., a bimsoil) is simulated.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2974500
10.1088/1755-1315/1124/1/012124
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85146597774
eng
ispartofbook:Rock and Fracture Mechanics in Rock Engineering and Mining 11/09/2022 - 15/09/2022 Helsinki, Finland
Eurock 2022
volume:1124
numberofpages:8
journal:IOP CONFERENCE SERIES. EARTH AND ENVIRONMENTAL SCIENCE
info:eu-repo/semantics/openAccess
ELETTRONICO
IOP Publishing
oai:iris.polito.it:11583/29855952024-03-06T02:06:05Zcom_11583_2614429com_11583_2614425col_11583_2614405
Innovative temporal loss function for segmentation of fine structures in ultrasound images
Marzola, Francesco
Meiburger, Kristen M.
Salvi, Massimo
Marzola, Francesco
Meiburger, Kristen M.
Salvi, Massimo
Training
Ultrasonic imaging
Biomedical optical imaging
Semantic segmentation
Image edge detection
Deep architecture
Optical imaging
Over the past few years, there have been significant advancements in deep learning architectures for semantic segmentation. However, the performance of these models heavily relies on the loss function (LF) used during network training. The LF is a crucial component that enables the network to weigh the errors differently based on the segmentation task to be performed. Despite the progress made in designing increasingly complex and deep architectures for semantic segmentation, the LFs used in these models have remained almost unchanged. Accurately segmenting small and fine objects, such as vessel walls (e.g., intima-media complex, IMC) or nerves (e.g., optic nerve), in ultrasound (US) images is still a challenging task. One of the main difficulties is pixel imbalance between the object and the background, which can result in inaccurate segmentation. Additionally, precise and accurate segmentation along the object's edge is crucial for medical diagnosis and treatment. To address these challenges, this paper proposes a new, temporal loss function for semantic segmentation in US images. The idea behind a temporal loss is to enable the network to learn from multiple sources of information simultaneously and to give more emphasis to losses that are more informative at different stages of the training process. The proposed LF considers pixel imbalance between the object and background and enables precise and accurate segmentation along the object's edge. The study aims to demonstrate the effectiveness of the proposed LF by evaluating its performance in segmenting vessel walls in US images.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2985595
10.1109/IUS51837.2023.10308305
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85178632797
info:eu-repo/semantics/altIdentifier/isbn/979-8-3503-4645-9
https://ieeexplore.ieee.org/document/10308305
ita
ispartofbook:International Ultrasonics Symposium
2023 IEEE International Ultrasonics Symposium (IUS)
numberofpages:4
info:eu-repo/semantics/openAccess
ELETTRONICO
IEEE
oai:iris.polito.it:11583/29840372024-03-23T02:17:05Zcom_11583_2614429com_11583_2614425col_11583_2614405
On incentivizing innovation diffusion in a network of coordinating agents
Zino, Lorenzo
Ye, Mengbin
Zino, Lorenzo
Ye, Mengbin
Dynamics on network
Control over network
Evolutionary game
Innovation diffusion is fundamental for societal growth and development, and understanding how to unlock it is key toward devising policies encouraging the adoption of new practices, e.g., sustainable innovations. Here, we propose a mathematical model to investigate such a problem. Specifically, we consider a coordination game —which is a standard game-theoretic model used to study innovation diffusion—and we embed it on an activity-driven network. Within this model, we integrate three policies to incentivize the adoption of the innovation: i) providing a direct advantage for adopting it, ii) making people sensitive to emerging trends at the population level, and iii) increasing the visibility of adopters of the innovation, respectively. We provide analytical insights to shed light on the effect of the joint use of these three policies on unlocking innovation diffusion, supported by numerical simulations.
2023
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2984037
10.1016/j.ifacol.2023.10.1766
https://www.sciencedirect.com/science/article/pii/S2405896323021754
eng
ispartofbook:IFAC World Congress
22nd IFAC World Congress
volume:56
firstpage:4186
lastpage:4191
numberofpages:6
serie:IFAC-PAPERSONLINE
info:eu-repo/semantics/openAccess
ELETTRONICO
Elsevier
oai:iris.polito.it:11583/29776912024-03-13T21:55:27Zcom_11583_2614429com_11583_2614425col_11583_2614405
GREEN PUBLIC PROCUREMENT OF BUILDING WORKS IN THE PIEDMONT REGION OF ITALY, LA CONTRATACION PUBLICA VERDE DE OBRAS DE EDIFICACION EN LA REGION ITALIANA DE PIAMONTE
Fuentes Bargues, J. L.
Piccirillo, E.
Rebaudengo, M.
Fuentes Bargues, J. L.
Piccirillo, E.
Rebaudengo, M.
Green public procurement
environmental criteria
Piedmont
Italy
2021
info:eu-repo/semantics/conferenceObject
https://hdl.handle.net/11583/2977691
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85127574065
ispartofbook:Proceedings from the International Congress on Project Management and Engineering
23rd International Congress on Project Management and Engineering, CIDIP 2019
volume:2021-July
firstpage:433
lastpage:446
numberofpages:14
info:eu-repo/semantics/openAccess
ELSEVIER
oai_dc///col_11583_2614405/100