Download or read book Dynamique non lin aire de l interaction onde particule dans le cas de spectres larges written by Brigitte Ragot and published by . This book was released on 1995 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA THEORIE QUASI-LINEAIRE JUSTIFIE LA DIFFUSION DE PARTICULES CHARGEES DANS UN SPECTRE LARGE D'ONDES PAR UNE DECORRELATION DE LA DYNAMIQUE POUR DES TEMPS LONGS COMPARES AU TEMPS D'AUTOCORRELATION DU CHAMP. ELLE SUPPOSE AUSSI QUE LES MODES DU SPECTRE CROISSENT EXPONENTIELLEMENT AVEC LE TAUX DE CROISSANCE DE LANDAU. L'ETUDE DE LA DYNAMIQUE NON LINEAIRE DES PARTICULES PERMET D'ETABLIR, DANS LE CADRE DE L'INTERACTION ONDE-PARTICULE, UNE EQUATION D'EVOLUTION POUR UNE HARMONIQUE DU CHAMP, EXPLIQUANT LES CORRELATIONS DE MODES OBSERVEES EXPERIMENTALEMENT ET NUMERIQUEMENT. CETTE ETUDE MET EN EVIDENCE UN TEMPS ESSENTIEL A LA COMPREHENSION DES PHENOMENES PHYSIQUES: LE TEMPS NON LINEAIRE D'INTERACTION ONDE-PARTICULES NL PROPORTIONNEL A LA DENSITE SPECTRALE D'ENERGIE A LA PUISSANCE -1/3. C'EST LE TEMPS DE CORRELATION DE LA DYNAMIQUE. POUR DES TEMPS INFERIEURS, LES TRAJECTOIRES DES PARTICULES SUIVENT UN ENSEMBLE QUASI-FRACTAL DE DIMENSION 2, CE QUI DONNE UN COEFFICIENT DE DIFFUSION MALGRE UNE TRES FAIBLE SENSIBILITE AUX CONDITIONS INITIALES. POUR DES TEMPS LONGS COMPARES A TAU NL S'ETABLIT UN REGIME DE DIFFUSION PLUS CLASSIQUE, AVEC MELANGE DANS L'ESPACE DES PHASES. ET POUR DES PARAMETRES DE RECOUVREMENT DONNANT NUMERIQUEMENT DES ECARTS A LA QUASI-LINEARITE, LA VALEUR DU COEFFICIENT DE DIFFUSION EST RETROUVEE ANALYTIQUEMENT. LE COEFFICIENT DE DIFFUSION EST EGALEMENT EXPRIME EN FONCTION DU TAUX DE CROISSANCE SOUS FORME D'UNE RELATION INTEGRALE, FAISANT CLAIREMENT APPARAITRE L'INTERVALLE DE NOMBRES D'ONDE SUR LEQUEL LA FORMULE DE LA THEORIE QUASI-LINEAIRE DOIT ETRE INTEGREE. ENFIN, TOUS CES RESULTATS, INITIALEMENT ETABLIS POUR UN SPECTRE DE LANGMUIR UNIDIMENSIONNEL, SONT ETENDUS AU CAS DE MODES SIFFLEURS. INDEPENDAMMENT DE CETTE ETUDE EST AUSSI DEMONTREE LA SINGULARITE DES ECARTS A LA QUASI-LINEARITE DU MAPPING STANDARD, NON LIES AUX MODES BALISTIQUES DU SYSTEME, ET QUI PEUVENT ETRE RETROUVES PAR LE TEMPS DE TRANSIT MOYEN

Download or read book Etude dynamique et statistique de l interaction onde particule written by Marie-Christine Firpo and published by . This book was released on 1999 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: ON S'INTERESSE D'ABORD AU CHAOS, VIA LE PLUS GRAND EXPOSANT DE LYAPUNOV L, ASSOCIE A LA DYNAMIQUE UNIDIMENSIONNELLE DE N PARTICULES INTERAGISSANT VIA DES FORCES A LONGUE PORTEE. POUR UN TEL HAMILTONIEN AYANT UN POTENTIEL ATTRACTIF ET SOUMIS A UNE TRANSITION DE PHASE DE SECOND ORDRE, L'UTILISATION D'UNE APPROCHE GEOMETRIQUE PERMET D'ESTIMER ANALYTIQUEMENT L EN FONCTION DE N ET DE LA DENSITE D'ENERGIE DANS LA LIMITE D'UN GRAND NOMBRE DE PARTICULES. L'ANALYSE PREDIT QUE : - DANS LA PHASE CONDENSEE, L EST POSITIF ET FINI POUR N INFINI, ET N'EST PAS MAXIMAL A LA TRANSITION MAIS LEGEREMENT EN-DESSOUS, - DANS LA PHASE LIBRE, LE CHAOS S'ANNULE POUR N INFINI AVEC UNE LOI D'ECHELLE EN N A LA PUISSANCE MOINS UN TIERS EN ACCORD AVEC LES RESULTATS NUMERIQUES. LA NATURE LONGUE PORTEE DE L'INTERACTION COULOMBIENNE FAVORISE L'EXISTENCE D'EFFETS COLLECTIFS DANS LES PLASMAS ET, SOUS CERTAINES CONDITIONS, INDUIT UNE DYNAMIQUE EFFECTIVE COUPLANT UN PETIT NOMBRE M DE MODES D'OSCILLATION COLLECTIFS (ONDES DE LANGMUIR) A UN FAISCEAU DE N PARTICULES SUSCEPTIBLES DE RESONNER AVEC EUX. UNE MODELISATION DE CE COUPLAGE ONDE-PARTICULE EST FOURNIE PAR UN HAMILTONIEN DIT AUTO-COHERENT PRESERVANT LA REVERSIBILITE DE LA DYNAMIQUE MICROSCOPIQUE. ON ETABLIT D'ABORD LA CONVERGENCE DE LA DYNAMIQUE MICROSCOPIQUE VERS LA SOLUTION CINETIQUE, OBTENUE DANS LA LIMITE D'UN NOMBRE INFINI DE PARTICULES, SUR TOUT INTERVALLE DE TEMPS BORNE. EN SE LIMITANT AU CAS D'UNE SEULE ONDE, LA QUESTION DU NIVEAU ASYMPTOTIQUE DE SON INTENSITE I DANS LE PROBLEME DE L'INSTABILITE FAISCEAU-PLASMA EST ABORDEE PAR UN TRAITEMENT DE MECANIQUE STATISTIQUE D'EQUILIBRE. IL APPARAIT QUE LE REGIME D'AMORTISSEMENT LANDAU EST GENERIQUEMENT ASSOCIE A UNE TRANSITION DE PHASE DE SECOND ORDRE, ADMETTANT POUR PARAMETRE D'ORDRE I/N, NOTE ICI P. UNE INTENSITE INITIALE CRITIQUE P0C EST OBTENUE : LA THERMODYNAMIQUE PREDIT UN NIVEAU D'EQUILIBRE POUR P, S'ANNULANT DANS LA LIMITE CINETIQUE SI P0 EST INFERIEUR A P0C, RESTANT A UN NIVEAU FINI SINON.

Download or read book Plasma Physics and Controlled Nuclear Fusion Research written by and published by . This book was released on 1962 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantum Mechanics Volume 3 written by Claude Cohen-Tannoudji and published by John Wiley & Sons. This book was released on 2019-12-16 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.

Download or read book Dynamique Non lin aire Et Le Chaos written by and published by . This book was released on 1993 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book On the Cauchy Problem written by Sigeru Mizohata and published by Academic Press. This book was released on 2014-05-10 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Notes and Reports in Mathematics in Science and Engineering, Volume 3: On the Cauchy Problem focuses on the processes, methodologies, and mathematical approaches to Cauchy problems. The publication first elaborates on evolution equations, Lax-Mizohata theorem, and Cauchy problems in Gevrey class. Discussions focus on fundamental proposition, proof of theorem 4, Gevrey property in t of solutions, basic facts on pseudo-differential, and proof of theorem 3. The book then takes a look at micro-local analysis in Gevrey class, including proof and consequences of theorem 1. The manuscript examines Schrödinger type equations, as well as general view-points on evolution equations. Numerical representations and analyses are provided in the explanation of these type of equations. The book is a valuable reference for mathematicians and researchers interested in the Cauchy problem.

Download or read book Integrable Systems written by V. Babelon and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the proceedings of the International Conference on Integrable Systems in memory of J.-L. Verdier. It was held on July 1-5, 1991 at the Centre International de Recherches Mathematiques (C.I.R.M.) at Luminy, near Marseille (France). This collection of articles, covering many aspects of the theory of integrable Hamiltonian systems, both finite and infinite-dimensional, with an emphasis on the algebro-geometric meth ods, is published here as a tribute to Verdier who had planned this confer ence before his death in 1989 and whose active involvement with this topic brought integrable systems to the fore as a subject for active research in France. The death of Verdier and his wife on August 25, 1989, in a car accident near their country house, was a shock to all of us who were acquainted with them, and was very deeply felt in the mathematics community. We knew of no better way to honor Verdier's memory than to proceed with both the School on Integrable Systems at the C.I.M.P.A. (Centre International de Mathematiques Pures et Appliquees in Nice), and the Conference on the same theme that was to follow it, as he himself had planned them.

Download or read book African Doctorates in Mathematics written by and published by Lulu.com. This book was released on 2007 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a catalogue of over 2000 doctoral theses by Africans in all fields of mathematics, including applied mathematics, mathematics education and history of mathematics. The introduction contains information about distribution by country, institutions, period, and by gender, about mathematical density, and mobility of mathematicians. Several appendices are included (female doctorate holders, doctorates in mathematics education, doctorates awarded by African universities to non-Africans, doctoral theses by non-Africans about mathematics in Africa, activities of African mathematicians at the service of their communities). Paulus Gerdes compiled the information in his capacity of Chairman of the African Mathematical Union Commission for the History of Mathematics in Africa (AMUCHMA). The book contains a preface by Mohamed Hassan, President of the African Academy of Sciences (AAS) and Executive Director of the Academy of Sciences for the Developing World (TWAS). (383 pp.)

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1993-03 with total page 1452 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 Fields Medallists Lectures written by Michael Atiyah and published by World Scientific. This book was released on 1997-10-13 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the Fields Medal does not have the same public recognition as the Nobel Prizes, they share a similar intellectual standing. It is restricted to one field - that of mathematics - and an age limit of 40 has become an accepted tradition. Mathematics has in the main been interpreted as pure mathematics, and this is not so unreasonable since major contributions in some applied areas can be (and have been) recognized with Nobel Prizes. The restriction to 40 years is of marginal significance, since most mathematicians have made their mark long before this age.A list of Fields Medallists and their contributions provides a bird's eye view of mathematics over the past 60 years. It highlights the areas in which, at various times, greatest progress has been made. This volume does not pretend to be comprehensive, nor is it a historical document. On the other hand, it presents contributions from 22 Fields Medallists and so provides a highly interesting and varied picture.The contributions themselves represent the choice of the individual Medallists. In some cases the articles relate directly to the work for which the Fields Medals were awarded. In other cases new articles have been produced which relate to more current interests of the Medallists. This indicates that while Fields Medallists must be under 40 at the time of the award, their mathematical development goes well past this age. In fact the age limit of 40 was chosen so that young mathematicians would be encouraged in their future work.The Fields Medallists' Lectures is now available on CD-ROM. Sections can be accessed at the touch of a button, and similar topics grouped together using advanced keyword searches.

Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.

Download or read book Boundary Layer Theory written by Hermann Schlichting (Deceased) and published by Springer. This book was released on 2016-10-04 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition of the near-legendary textbook by Schlichting and revised by Gersten presents a comprehensive overview of boundary-layer theory and its application to all areas of fluid mechanics, with particular emphasis on the flow past bodies (e.g. aircraft aerodynamics). The new edition features an updated reference list and over 100 additional changes throughout the book, reflecting the latest advances on the subject.

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 An Introduction To Plasmonics written by Olivier Pluchery and published by World Scientific. This book was released on 2023-08-28 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: What is a plasmon? Is it a particle, like a photon or a wave? Plasmonics stands at the frontier of condensed matter physics, which is the world of electrons, optics and of photons. Plasmonics is one of the most active fields in nanophotonics. This book begins by exploring the concepts behind waves, and the electromagnetic description of light when it interacts with metals; it dedicates every chapter thereafter to all aspects of plasmonics. In particular, the surface plasmon polariton wave is explained in full detail, as well as the localized surface plasmon resonance of metallic nanoparticles. The active research area opened by plasmonics, as well as its applications, are also briefly explained, such as advanced biosensing, subwavelength waveguiding, quantum plasmonics, nanoparticle-based cancer therapies, optical nano-antenna and high-efficiency photovoltaic cells.The book is adapted for graduate students and places a special emphasis on providing complete explanations of the fundamental concepts of plasmonics. Further, each of these concepts is illustrated with examples drawn from the most recent scientific literature. Each chapter ends with a set of exercises that will help the reader revise the concepts and go deeper into the world of plasmonics. More than 70 exercises are included.

Download or read book Quantum Theory of Finite Systems written by Jean-Paul Blaizot and published by Mit Press. This book was released on 1986 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive and pedagogical account of the various methods used in the quantum theory of finite systems, including molecular, atomic, nuclear, and particle phenomena. Covering both background material and advanced topics and including nearly 200 problems, Quantum Theory of Finite Systems has been designed to serve primarily as a text and will also prove useful as a reference in research. The first of the book's four parts introduces the basic mathematical apparatus: second quantization, canonical transformations, Wick theorems and the resulting diagram expansions, and oscillator models. The second part presents mean field approximations and the recently developed path integral methods for the quantization of collective modes. Part three develops perturbation theory in terms of both time-dependent Feynman diagrams and time-independent Goldstone diagrams. A fourth part discusses variational methods based on correlated wavefunctions, including spin correlations. The approximation schemes are formulated for fermions and bosons at eigher zero or non-zero temperature. Although the formalism developed applies to both finite and infinite systems, the book stresses those aspects of the theory that are specific to the description of finite systems. Thus special attention is given to mean field approximations, the ensuing broken symmetries, and the associated collective motions such as rotations. Conversely, some specific features of systems with infinite numbers of degrees of freedom (such as the thermodynamic limit, critical phenomena, and the elimination of ultraviolet divergencies) are deliberately omitted. Jean-Paul Blaizot and Georges Ripka are associated with the Centre d'Etudes Nucleaires de Saclay.

Download or read book UCRL written by U.S. Atomic Energy Commission and published by . This book was released on 19?? with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: