High Order Solutions and Generalized Darboux Transformations of Derivative Schr\"odinger Equation

By means of certain limit technique, two kinds of generalized Darboux transformations are constructed for the derivative nonlinear Sch\"odinger equation (DNLS). These transformations are shown to lead to two solution formulas for DNLS in terms of determinants. As applications, several different types of high order solutions are calculated for this equation.Comment: 26 pages,5 figure

Study of a beta-gamma directional correlation in the decay of Sb¹²⁵

Ph.D.L. David Wyl

The Controlled Synthesis of Hydrogen Electrocatalysts for Alkaline Exchange Membrane Fuel Cell and Electrolysis Applications via Chemical Vapor Deposition

The development of catalysts for the electrochemical processes of hydrogen systems (e.g., fuel cells and electrolyzer systems) continues to be an attractive area of research for renewable energy technologies. One significant challenge has been developing hydrogen catalysts suitable for alkaline environments, mainly due to the sluggish kinetics of hydrogen reactions. In alkaline environments, the kinetics are decreased by two orders of magnitude when compared to acidic environments. Chemical vapor deposition (CVD) is a conventional method used to synthesize these types of catalysts. This effort discusses extending work being done using a modified CVD process known as “Poor Man’s” CVD (PMCVD) to tailor catalyst properties and inherently further its impact in electrochemical catalyst application. PMCVD utilizes an inexpensive vacuum oven to sublime commercially available and easily synthesized metal-organic salt precursors, lowering synthesis cost while providing better control of the catalyst properties such as particle size and distribution. Herein, we describe the various efforts conducted to characterize electrocatalysts produced via the PMCVD process to further elucidate this modified CVD method\u27s versatility and control. Additionally, we utilize a myriad of electrochemical characterization techniques to measure the electrocatalytic activates of catalyst prepared using this modified CVD method for the hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) in alkaline media through half-cell reactions. The study begins with the development of rate laws and deposition mechanism for the PMCVD process facilitated by measuring particle growth as a function of metal loading. We investigate the impact varying reaction conditions have on the crystal structure of the deposited nanoparticles. We determine the PMCVD’s efficiency in alloying identical and mixed crystal structured metals through the development of bifunctional catalysts for the HOR/HER. We studied the impact varying properties of carbon supports has on the deposition method as well as how these properties impact the hydrogen kinetics. We close this work by investigating the deposition of transition metals and begin the necessary steps to elucidating the impact the addition of water has on the deposition mechanism. These results provide a clear description regarding the tuning of both physical and catalytic properties of nanoparticles produced through this deposition method

Hall Stuart : Identités et cultures 2. Politiques des différences

« D’où viens-tu ? ». Cette question est le tout premier énoncé de l’ouvrage. Elle est en effet posée en tête de la préface proposée par Maxime Cervulle. La réponse de Stuart Hall initiée dans la suite du livre, en fait dès l’avant-propos, semble correspondre plutôt à la question « Qui es-tu ? ». Identités et cultures 2. Politiques des différences traite de l’influence des représentations culturelles sur celles du soi. L’ouvrage est composé de trois parties, d’un avant-propos et d’une préface ..

Hélène Bourdeloie et Christine Chevret-Castellani : L’impossible Patrimoine Numérique ? Mémoire & Traces

Ce petit ouvrage récent propose une liaison de la définition du patrimoine et de son devenir dans la sphère numérique. Paru en 2019, il s’appuie en partie sur des enquêtes de terrain. L’impossible patrimoine numérique ? Mémoire & traces indique à la fin de son introduction qu’il voudrait « ouvrir des pistes de réflexion sur les dimensions patrimoniales, mémorielles et pérennes des traces à l’heure du numérique ». C’est un petit livre organisé en quatre chapitres, dont l’introduction, la concl..

A Bioética Comunitária da Cidade Educadora

As reflexões bioéticas que se iniciaram pelo progresso das investigações biológicas de sucesso tiveram alargado seu campo de atuação pelo paradigma da complexidade fazendo emergir reflexões bioética-comunitárias da urbe como comunidade de aprendizagem, cuja manutenção do pensamento sistemático-reducionista provoca o fracasso das ações políticas de ocupação dos espaços públicos

Pierre Delcambre et Céline Matuszak (dir.) : Écrire au magistrat : nouvelles normes, nouvelles contraintes

Cet ouvrage collectif dirigé par Pierre Delcambre et Céline Matuszak est l’un des aboutissements d’une recherche, mêlant commande institutionnelle et expertise scientifique, portée à la fois par l’École nationale de la protection judiciaire de la jeunesse (ENPJJ), la Direction de la protection judiciaire de la jeunesse et le Groupement d’études et de recherche interdisciplinaire en information et communication (laboratoire GERiiCO). Organisé en deux parties divisées chacune en cinq chapitres,..