PORTO @ Archivio Istituzionale della Ricerca

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On the l.c.m. of shifted Fibonacci numbers

Let (Fn)n≥1 be the sequence of Fibonacci numbers. Guy and Matiyasevich proved that log lcm(F1,F2,...,Fn) ∼ 3log α π2 ⋅ n2,as n → +∞, where lcm is the least common multiple and α:= 1 + 5)/2 is the golden ratio. We prove that for every periodic sequence s...

The largest entry in the inverse of a Vandermonde matrix

We investigate the size of the largest entry (in absolute value) in the inverse of certain Vandermonde matrices. More precisely, for every real b > 1, let Mb(n) be the maximum of the absolute values of the entries of the inverse of the n × n matrix [bij]0≤i,j

Multiscale control of generic second order traffic models by driver-assist vehicles

We study the derivation of generic high order macroscopic traffic models from a follow-the-leader particle description via a kinetic approach. First, we recover a third order traffic model as the hydrodynamic limit of an Enskog-type kinetic equation. Next, we introduce in the vehicle&#x...

Damage evolution analysis in a “spaghetti” bridge model using the acoustic emission technique

This paper applies the Acoustic Emission (AE) Technique to analyze the damage process in a one-meter span bridge model that was built from spaghetti sticks during a loading test. The AE signals are analyzed in terms of four coefficients that are evaluated as predictors of ...

Theory of critical distances: A discussion on concepts and applications

Theory of Critical Distances (TCD) collects several methods adopted in failure prediction of components provided with stress concentration features. The idea of evaluating stress effect in a zone rather than in a single point was proposed decades ago but, only thanks to relatively ...

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PORTO @ Archivio Istituzionale della Ricerca

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Prodotti recenti

On the l.c.m. of shifted Fibonacci numbers

The largest entry in the inverse of a Vandermonde matrix

Multiscale control of generic second order traffic models by driver-assist vehicles

Damage evolution analysis in a “spaghetti” bridge model using the acoustic emission technique

Theory of critical distances: A discussion on concepts and applications

Novità

Informazioni e supporto su IRIS

Supporto IRIS

Open Access

Supporto alla valutazione

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