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Affichage de 221 à 230 sur 950

Article dans une revue

MULTIPLE BOUNDED VARIATION SOLUTIONS FOR A PRESCRIBED MEAN CURVATURE EQUATION WITH NEUMANN BOUNDARY CONDITIONS

Alberto Boscaggin, Francesca Colasuonno, Colette De Coster

We prove the existence of multiple positive BV-solutions of the Neumann problem - (u'/\sqrt{1+{u'}^2})' = a(x)f (u) in (0, 1), u (0) = u (1) = 0, where a(x) > 0 and f belongs to a class of nonlinear functions whose prototype example is given by f (u) = −λu + u^p, for λ > 0 and…

Journal of Differential Equations, 2021, 285, pp.607-639. ⟨10.1016/j.jde.2021.03.021⟩. ⟨hal-03721320⟩

Article dans une revue

Under pressure! Nudging electricity consumption within firms. Feedback from a field experiment

Christophe Charlier, Gilles Guerassimoff, Ankinée Kirakozian, Sandrine Selosse

Many economists and psychologists have studied the impact of nudges on households' pro-environmental behaviors. Interestingly, "private nudges'' can be imagined for companies. Yet, studies focusing on nudging employees' energy use are rare. The objective of our paper is to…

Energy Journal, 2021, 42 (1). ⟨hal-02526322⟩

Notice d’encyclopédie ou de dictionnaire

Overview of Substitutes for Bone Replacement: Natural and Synthetic Products

Nicolas Somers, Marie Lasgorceix

This review provides an overview of materials from natural and synthetic origin, specifically in the field of bioceramics and bioglasses, applied to bone substitution. The different developmental approaches currently considered to improve the biological performance of these bone implants, mainly…

Encyclopedia of Materials: Technical Ceramics and Glasses, 2021, pp.473-492. ⟨10.1016/b978-0-12-818542-1.00052-7⟩. ⟨hal-03889933⟩

Article dans une revue

Every centroaffine Tchebychev hyperovaloid is ellipsoid

Xiuxiu Cheng, Zejun Hu, Luc Vrancken

We study locally strongly convex Tchebychev hypersurfaces, namely the centroaffine totally umbilical hypersurfaces, in the (n+1)-dimensional affine space Rn+1. We first make an ordinary-looking observation that such hypersurfaces are characterized by having a Riemannian structure admitting a…

Pacific Journal of Mathematics, 2021, 315 (1), pp.27-44. ⟨10.2140/pjm.2021.315.27⟩. ⟨hal-03722505⟩

Article dans une revue

On a class of recursive estimators for spatially dependent observations

Mohamed El Machkouri, Lucas Reding

We investigate the mean squared error and the asymptotic normality for a class of recursive kernel estimators based on a sample of spatially dependent observations. Our main result provides sufficient conditions for a spatial version of a recursive estimator introduced by Hall and Patil (1994) to…

Electronic Journal of Statistics , 2021, 15 (2), ⟨10.1214/21-ejs1878⟩. ⟨hal-04368133⟩

Article dans une revue

Adaptation in a heterogeneous environment. I: Persistence versus extinction

François Hamel, Florian Lavigne, Lionel Roques

Understanding how a diversity of plants in agroecosystems affects the adaptation of pathogens is a key issue in agroecology. We analyze PDE systems describing the dynamics of adaptation of two phenotypically structured populations, under the effects of mutation, selection and migration in a two-…

Journal of Mathematical Biology, 2021, 83 (2), pp.14. ⟨10.1007/s00285-021-01637-8⟩. ⟨hal-02612415v2⟩

Notice d’encyclopédie ou de dictionnaire

Sintering of Ceramics: An Overview

Anne Leriche, Francis Cambier, Stuart Hampshire

This article gives an overview of surface and bulk matter transport processes occurring during the densification of ceramic powder compacts. Starting from purified or chemically synthesized raw materials, sintering takes place by either solid state or liquid phase mechanisms during heat treatment…

Encyclopedia of Materials: Technical Ceramics and Glasses, 2021, pp.233-248. ⟨10.1016/B978-0-12-803581-8.12083-1⟩. ⟨hal-04475174⟩

Ouvrages

Representation Theory of Solvable Lie Groups and Related Topics

Jean Ludwig, Ali Baklouti, Hidenori Fujiwara

The purpose of the book is to discuss the latest advances in the theory of unitary representations and harmonic analysis for solvable Lie groups. The orbit method created by Kirillov is the most powerful tool to build the ground frame of these theories. Many problems are studied in the nilpotent…

Springer International Publishing, 2021, Springer Monographs in Mathematics, 978-3-030-82043-5. ⟨10.1007/978-3-030-82044-2⟩. ⟨hal-03314530⟩

Article dans une revue

Piezoelectric and Electromechanical Characteristics of Porous Poly(Ethylene-co-Vinyl Acetate) Copolymer Films for Smart Sensors and Mechanical Energy Harvesting Applications

Chouaib Ennawaoui, Abdelowahed Hajjaji, Cédric Samuel, Erroumayssae Sabani, Abdelkader Rjafallah, Ikrame Najihi, El Mehdi Laadissi, El Mehdi Loualid, Mohamed Rguiti, Abdessamad El Ballouti, Azeddine Azim

This paper investigates energy harvesting performances of porous piezoelectric polymer films to collect electrical energy from vibrations and power various sensors. The influence of void content on the elastic matrix, dielectric, electrical, and mechanical properties of porous piezoelectric polymer…

Applied System Innovation, 2021, 4 (3), pp.57. ⟨10.3390/asi4030057⟩. ⟨hal-03703173⟩

Article dans une revue

Affine hypersurfaces with constant sectional curvature

Miroslava Antić, Haizhong Li, Luc Vrancken, Xianfeng Wang

We use a new approach to study locally strongly convex hypersurfaces with constant sectional curvature in the affine space (Formula presented). We prove a nice relation involving the eigenvalues of the shape operator S and the difference tensor K of the affine hypersurface. This is achieved by…

Pacific Journal of Mathematics, 2021, 310 (2), pp.275-302. ⟨10.2140/pjm.2021.310.275⟩. ⟨hal-03722534⟩