Download or read book ETUDE THEORIQUE DE LA PROPAGATION DES ELECTRONS RAPIDES DANS LES ALLIAGES written by Cyrille Barreteau and published by . This book was released on 1995 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE TRAITE DE L'INFLUENCE DU DESORDRE CHIMIQUE SUR LA PROPAGATION DES ELECTRONS RAPIDES. C'EST UN SUJET DIRECTEMENT LIE AUX ETUDES DU LABORATOIRE DE PHYSIQUE DU SOLIDE DE L'ONERA, SUR LES ALLIAGES METALLIQUES, EN PARTICULIER PAR MICROSCOPIE ELECTRONIQUE A TRANSMISSION. CERTAINES OBSERVATIONS DES MICROSCOPISTES SEMBLENT MONTRER QUE L'EFFET DU DESORDRE CHIMIQUE SUR LES IMAGES EST HAUTEMENT NON-LINEAIRE. L'OBJECTIF DE CETTE THESE EST DONC DE PRECISER PLUS QUANTITATIVEMENT LA REPONSE DE LA FONCTION D'ONDE A UN TEL DESORDRE. LA DEMARCHE ADOPTEE A ETE EN PREMIER LIEU DE PLACER EXPLICITEMENT LE FORMALISME DE LA DIFFRACTION DES ELECTRONS RAPIDES DANS LE CADRE GENERAL DE LA PHYSIQUE DU SOLIDE. CETTE APPROCHE GLOBALE PERMET D'UTILISER LES OUTILS TRADITIONNELS DE LA PHYSIQUE ELECTRONIQUE DU SOLIDE: THEORIE DES BANDES, APPROXIMATION DES LIAISONS FORTES ET DES ELECTRONS PRESQUE LIBRES, METHODE DES ONDES PLANES ORTHOGONALISEES ETC L'UTILISATION DE L'OUTIL INFORMATIQUE A EGALEMENT ETE ASSEZ SYSTEMATIQUE ET A PERMIS DE METTRE AU POINT DES PROGRAMMES EFFICACES D'ANALYSE DES PHENOMENES DE LA DIFFRACTION DYNAMIQUE. UNE ANALYSE TRES PRECISE DE CAS SIMPLES (DIFFRACTION PAR LES CRISTAUX MONOATOMIQUES ET PAR LES ALLIAGES ORDONNES) A TOUT D'ABORD ETE EFFECTUEE AFIN DE COMPRENDRE EN DETAIL TOUS LES PARAMETRES PERTINENTS DU PROBLEME, ET DE CERNER LES DIFFICULTES. UNE FOIS LE CADRE GENERAL DEFINI DE FACON PRECISE, IL EST PLUS AISE D'ABORDER LE PROBLEME COMPLEXE DE L'EFFET DU DESORDRE. L'UTILISATION SYSTEMATIQUE DE L'APPROXIMATION DE LA COLONNE ATOMIQUE INTRODUITE PAR DIRK VAN DYCK A PERMIS DE DECRIRE DE FACON RELATIVEMENT SIMPLE ET SYNTHETIQUE L'EFFET DU DESORDRE CHIMIQUE, ET EXPLIQUE DE NOMBREUX COMPORTEMENTS PHYSIQUES OBSERVES PAR LES EXPERIMENTATEURS. MAIS NOTRE ANALYSE OUVRE EGALEMENT DES POSSIBILITES NOUVELLES D'APPLICATIONS A DES PHENOMENES COMPLEXES, TELS QUE LA DIFFUSION DIFFUSE, L'EFFET DE L'AGITATION THERMIQUE, ET PEUT S'APPLIQUER A L'ANALYSE DE NOMBREUSES SITUATIONS EXPERIMENTALES
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1996 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Etude Des lectrons Rapides Partir Du Rayonnement X dur written by Robert Arslanbekov and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: L'OBJECTIF PRINCIPAL DE CETTE THESE ETAIT D'ETUDIER LA DYNAMIQUE DES ELECTRONS RAPIDES SUR LA BASE DES SIMULATIONS NUMERIQUES ET DES MESURES DE RAYONNEMENT X EFFECTUEES A HAUTE ENERGIE A L'AIDE DU DIAGNOSTIC INSTALLE SUR LE TOKAMAK TORE SUPRA. CES ELECTRONS SONT PRODUITS PAR INTERACTION RESONNANTE AVEC L'ONDE HYBRIDE. DEUX ASPECTS IMPORTANTS DE LA PROPAGATION ET DE L'ABSORPTION DE L'ONDE HYBRIDE ONT ETE ABORDES: (I) ETUDE DE L'EFFET DE LA MODULATION PERIODIQUE (RIPPLE) DU CHAMP MAGNETIQUE RESULTANT DU NOMBRE DISCRET DE BOBINES, (II) MODELISATION BIDIMENSIONNELLE DANS L'ESPACE DES VITESSES DE LA DYNAMIQUE DES ELECTRONS RAPIDES. EN PRENANT EN COMPTE LE RIPPLE DANS LE TRACE DE RAYON, UN MEILLEUR ACCORD EST TROUVE AVEC LES RESULTATS EXPERIMENTAUX, EN PARTICULIER LES SPECTRES X NON-THERMIQUES RESULTANT DU RAYONNEMENT DE FREINAGE EMIS PAR LES ELECTRONS RAPIDES SUR LE PLASMA, ET LE COURANT NON-INDUCTIF TEL QU'IL EST DEDUIT DES MESURES DE POLARIMETRIE. ON A PRESENTE LE MODELE THEORIQUE DE BASE SUR LEQUEL REPOSE LE CALCUL DE LA FONCTION DE DISTRIBUTION DES ELECTRONS, AINSI QUE LA METHODE NUMERIQUE POUR RESOUDRE L'EQUATION DE FOKKER-PLANCK. ON MONTRE QUE LA DESCRIPTION BIDIMENSIONNELLE DE LA DYNAMIQUE DES ELECTRONS RAPIDES EST INDISPENSABLE LORSQUE L'ON CONSIDERE LE DOMAINE D'ENERGIE SITUE AU-DELA DU PLATEAU DE DIFFUSION QUASI-LINEAIRE. UN GRAND NOMBRE DE SIMULATIONS ONT ETE MENEES, ET ON MONTRE QUE L'ON OBTIENT POUR LA PREMIERE FOIS UN TRES BON ACCORD AVEC LE RAYONNEMENT DE FREINAGE TANT POUR LE PROFIL RADIAL QUE POUR LA DEPENDANCE EN ENERGIE, TOUT EN ETANT COMPATIBLE AVEC LE NIVEAU DE COURANT NON-INDUCTIF, ET CECI SANS PARAMETRES D'AJUSTEMENT ADHOC, CE QUI CONSTITUE UN PROGRES SPECTACULAIRE DANS CE DOMAINE
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1996 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal de physique th orique et appliqu e written by and published by . This book was released on 1978 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Download or read book Use of Plutonium for Power Production written by International Atomic Energy Agency and published by . This book was released on 1965 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book UNESCO General History of Africa Vol I Abridged Edition written by Jacqueline Ki-Zerbo and published by Univ of California Press. This book was released on 1990 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This volume covers the period from the end of the Neolithic era to the beginning of the seventh century of our era. This lengthy period includes the civilization of Ancient Egypt, the history of Nubia, Ethiopia, North Africa and the Sahara, as well as of the other regions of the continent and its islands."--Publisher's description
Download or read book Molecular Beam Epitaxy written by John Wilfred Orton and published by . This book was released on 2015 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is a history of Molecular Beam Epitaxy (MBE) as applied to the growth of semiconductor thin films (note that it does not cover the subject of metal thin films). It begins by examining the origins of MBE, first of all looking at the nature of molecular beams and considering their application to fundamental physics, to the development of nuclear magnetic resonance and to the invention of the microwave MASER. It shows how molecular beams of silane (SiH4) were used to study the nucleation of silicon films on a silicon substrate and how such studies were extended to compound semiconductors such as GaAs. From such surface studies in ultra-high vacuum the technique developed into a method of growing high quality single crystal films of a wide range of semiconductors. Comparing this with earlier evaporation methods of deposition and with other epitaxial deposition methods such as liquid phase and vapour phase epitaxy (LPE and VPE). The text describes the development of MBE machines from the early 'home-made' variety to that of commercial equipment and show how MBE was gradually refined to produce high quality films with atomic dimensions. This was much aided by the use of various in-situ surface analysis techniques, such as reflection high energy electron diffraction (RHEED) and mass spectrometry, a feature unique to MBE. It looks at various modified versions of the basic MBE process, then proceed to describe their application to the growth of so-called 'low-dimensional structures' (LDS) based on ultra-thin heterostructure films with thickness of order a few molecular monolayers. Further chapters cover the growth of a wide range of different compounds and describe their application to fundamental physics and to the fabrication of electronic and opto-electronic devices. The authors study the historical development of all these aspects and emphasise both the (often unexpected) manner of their discovery and development and the unique features which MBE brings to the growth of extremely complex structures with monolayer accuracy.
Download or read book Reactor Core Materials written by and published by . This book was released on 1960 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reclaiming Indigenous Voice and Vision written by Marie Battiste and published by UBC Press. This book was released on 2011-11-01 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: The essays in Reclaiming Indigenous Voice and Vision spring from an International Summer Institute held in 1996 on the cultural restoration of oppressed Indigenous peoples. The contributors, primarily Indigenous, unravel the processes of colonization that enfolded modern society and resulted in the oppression of Indigenous peoples.
Download or read book CASTI Metals Blue Book Welding Filler Metals written by Barry M. Patchett and published by . This book was released on 2000-01-01 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Protecting Indigenous Knowledge and Heritage written by Marie Battiste and published by UBC Press. This book was released on 2000-04-01 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Whether in Canada, the United States, Australia, India, Peru, or Russia, the approximately 500 million Indigenous Peoples in the world have faced a similar fate at the hands of colonizing powers. Assaults on language and culture, commercialization of art, and use of plant knowledge in the development of medicine have taken place all without consent, acknowledgement, or benefit to these Indigenous groups worldwide. Battiste and Henderson passionately detail the devastation these assaults have wrought on Indigenous peoples, why current legal regimes are inadequate to protect Indigenous knowledge, and put forward ideas for reform. Looking at the issues from an international perspective, this book explores developments in various countries including Canada, the United States, Australia, New Zealand, and also the work of the United Nations and relevant international agreements.
Download or read book Properties of UO2 written by J. Belle and published by . This book was released on 1957 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A German English Dictionary for Chemists written by Austin M 1876-1956 Patterson and published by Scholar Select. This book was released on 2015-08-08 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1978 with total page 1054 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
