Di Crescenzo, A. Di Nardo, E. Ricciardi, L. M.
Published in
Methodology and Computing in Applied Probability

The first-passage-time problem for a Brownian motion with alternating infinitesimal moments through a constant boundary is considered under the assumption that the time intervals between consecutive changes of these moments are described by an alternating renewal process. Bounds to the first-passage-time density and distribution function are obtain...

Puchta, Jan-Christoph
Published in
The Ramanujan Journal

We give a new proof of a theorem of P. Mihailescu which states that the equation xp − yq = 1 is unsolvable with x, y integral and p, q odd primes, unless the congruences pq ≡ p (mod q2) and qp ≡ q (mod p2) hold.

Mari, Carlo Fulvi
Published in
Journal of Computational Neuroscience

A model of columnar networks of neocortical association areas is studied. The neuronal network is composed of many Hebbian autoassociators, or modules, each of which interacts with a relatively small number of the others, randomly chosen. Any module encodes and stores a number of elementary percepts, or features. Memory items, or patterns, are pecu...

Burde, Dietrich
Published in
Geometriae Dedicata

We study the existence problem for Novikov algebra structures on finite-dimensional Lie algebras. We show that a Lie algebra admitting a Novikov algebra is necessarily solvable. Conversely we present a 2-step solvable Lie algebra without any Novikov structure. We use extensions and classical r-matrices to construct Novikov structures on certain cla...

Renault, Ludovic Chou, Hui -Ting Chiu, Po -Lin Hill, Rena M. Zeng, Xiangyan Gipson, Bryant Zhang, Zi Yan Cheng, Anchi Unger, Vinzenz Stahlberg, Henning
...
Published in
Journal of Computer-Aided Molecular Design

Electron crystallography determines the structure of membrane embedded proteins in the two-dimensionally crystallized state by cryo-transmission electron microscopy imaging and computer structure reconstruction. Milestones on the path to the structure are high-level expression, purification of functional protein, reconstitution into two-dimensional...

Leterrier, Y. Pellaton, D. Mendels, D. Glauser, R. Andersons, J. Månson, J.-A. E.
Published in
Journal of Materials Science

Crack patterns of 53 nm and 103 nm thick silicon oxide coatings on poly(ethylene terephthalate) films are analyzed under equibiaxial stress loading, by means of a bulging cell mounted under an optical microscope with stepwise pressurization of film specimens. The biaxial stress and strain are modeled from classical elastic membrane equations, and a...

de Cornulier, Yves
Published in
Geometriae Dedicata

We characterize which permutational wreath products \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$G \ltimes W^{(X)}$$\end{document} are finitely presented. This occur...

Mezzenga, R. Månson, J. A. E.
Published in
Journal of Materials Science

The thermo-mechanical properties of hyperbranched polymer-epoxy blends and their dependence on hyperbranched polymer shell chemistry were investigated. Hyperbranched polymers were shown to be able to increase resin toughness by inducing both a heterogeneous and homogeneous morphology. While the former was better performing in terms of toughness, th...

Wyser, Y. Leterrier, Y. Månson, J.-A. E.
Published in
Journal of Materials Science

The short-term mechanical strength of platelet-reinforced polymer composites was modeled using classical two-dimensional stress-transfer analysis. The stress field in the platelet and at the platelet/matrix interface was described in the presence of a matrix crack perpendicular to the interface. Modeling takes into account the tensile strength of t...

Zanta, Carmem L.P.S. Michaud, Pierre-Alan Comninellis, Christos De Andrade, Adalgisa R. Boodts, Julien. F.C.
Published in
Journal of Applied Electrochemistry

The influence of an IrO2 interlayer between the Ti substrate and the SnO2–Sb2O5 coating on the electrode service life and on the efficiency of p-chlorophenol (p-CP) oxidation for wastewater treatment has been investigated. The results have shown that if the loading of the SnO2–Sb2O5 coating relative to the IrO2 interlayer loading (γ ratio defined b...