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Etude De La Dynamique Dun Cristal Moleculaire Dans Sa Phase Ordonnee
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Book Synopsis Etude de la dynamique d'un cristal moléculaire dans sa phase "ordonnée" by : Alain Hedoux
Download or read book Etude de la dynamique d'un cristal moléculaire dans sa phase "ordonnée" written by Alain Hedoux and published by . This book was released on 1986 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail s'inscrit dans le cadre général de l'étude des transitions ordre-désordre entre une structure basse température ordonnée de faible symétrie et une phase haute température à désordre orientationnel dont la structure moyenne est de haute symétrie. Son originalité résulte de la haute symétrie (H.C.) de la phase basse température des composes X (CH2-CH2(3)) y, dont la triéthylènediamine est un représentant. Structure et désordre orientationnel dans la phase plastique (i) de la triéthylènediamine par diffraction Rx et diffusion incohérente des neutrons. Dynamique des mouvements moléculaires de la phase II par diffusion Raman et diffusion cohérente des neutrons
Book Synopsis FUSION ORIENTATIONNELLE D'UN CRISTAL MOLECULAIRE, EFFETS DE SURFACE. SIMULATION NUMERIQUE DE DYNAMIQUE MOLECULAIRE by : MOHAMED.. AHERMOUCH
Download or read book FUSION ORIENTATIONNELLE D'UN CRISTAL MOLECULAIRE, EFFETS DE SURFACE. SIMULATION NUMERIQUE DE DYNAMIQUE MOLECULAIRE written by MOHAMED.. AHERMOUCH and published by . This book was released on 1998 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS CE TRAVAIL, NOUS NOUS INTERESSONS A DES CRISTAUX MOLECULAIRES QUI PRESENTENT UNE FUSION ORIENTATIONNELLE OU LES DEGRES DE LIBERTE ORIENTATIONNELS DES MOLECULES SE LIBERENT, ALORS QUE LES TRANSLATIONS RESTENT BLOQUEES PAR LE RESEAU CRISTALLIN. NOUS AVONS SIMULE UN ECHANTILLON DE KCLO 4 DE 8 8 8 MAILLES, SOIT 2048 MOLECULES DE KCLO 4. LES SIMULATIONS SE FONT AVEC DES CONDITIONS PERIODIQUES AUX LIMITES DANS DEUX DIRECTIONS SEULEMENT PERMETTANT AINSI DE REPRODUIRE UNE SURFACE LIBRE D'ORIENTATION CONNUE. CECI NECESSITE DE MODIFIER LA METHODE DE LA SOMME D'EWALD, UTILISEE POUR CALCULER LES INTERACTIONS A LONGUE PORTEE POUR UN ECHANTILLON INFINI. ON EST AMENE A CALCULER LA SOMME D'EWALD DANS LES DEUX DIRECTIONS OU L'ON IMPOSE LES CONDITIONS PERIODIQUES, ALORS QUE DANS LA DIRECTION PERPENDICULAIRE A LA SURFACE LIBRES ON FAIT UNE SOMME EXPLICITE. TOUTES NOS SIMULATIONS ONT ETE EFFECTUEES SUR LES MACHINES MASSIVEMENT PARALLELES (CM-5). POUR ETUDIER LES EFFETS DE SURFACE, LES FONCTIONS CARACTERISTIQUES DES ORDRES ORIENTATIONNEL ET TRANSLATIONNEL ONT ETE SUIVIES AVANT ET PENDANT LA TRANSITION DE PHASE. POUR LES DIFFERENTES ORIENTATIONS DES SURFACES LIBRES, ON A OBTENU UNE STRUCTURE CORRECTE DANS LES DEUX PHASES, AINSI QU'UN ACCORD RAISONNABLE DES PARAMETRES DE LA MAILLE ORTHORHOMBIQUE ET CUBIQUE. ON A EFFECTUE DES SIMULATIONS EN S'APPROCHANT DE LA TRANSITION AFIN D'OBSERVER LES EFFETS PRE-TRANSITIONNELS EN SURFACE. POUR LES DIFFERENTES ORIENTATIONS DES SURFACES LIBRES, LE DESORDRE S'INITIE EN SURFACE LONGTEMPS AVANT QUE LA TRANSITION N'AIT EFFECTIVEMENT LIEU. LA CINETIQUE DE LA TRANSITION, AINSI QUE LA TEMPERATURE A LAQUELLE ELLE A LIEU DEPEND DE L'ORIENTATION DES SURFACES LIBRES : ON OBSERVE SOIT UNE CROISSANCE DE LA PHASE DESORDONNEE A PARTIR DES SURFACES LIBRES, SOIT LA CROISSANCE DE GERMES SITUES AU CUR DE L'ECHANTILLON. LES RAISONS DE CES DIFFERENCES SONT DISCUTEES.
Book Synopsis LA FUSION D'UN CRISTAL MOLECULAIRE. UNE ETUDE PAR SIMULATION NUMERIQUE DE LA DYNAMIQUE MOLECULAIRE by : Anne Boutin
Download or read book LA FUSION D'UN CRISTAL MOLECULAIRE. UNE ETUDE PAR SIMULATION NUMERIQUE DE LA DYNAMIQUE MOLECULAIRE written by Anne Boutin and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: LA FUSION D'UN CRISTAL, L'HEXAFLUORURE DE SOUFRE, EST ETUDIEE PAR SIMULATION NUMERIQUE DE LA DYNAMIQUE MOLECULAIRE. DES SIMULATIONS DE DIVERS SYSTEMES PHYSIQUES ISSUS D'UN MODELE COMMUN REALISTE, ONT ETE REALISEES SUR UN ORDINATEUR A ARCHITECTURE PARALLELE A BASE DE TRANSPUTERS. DES ETUDES COMPAREES DE DIFFERENTS CRISTAUX, EN PRESENCE OU NON DE DEFAUTS PONCTUELS OU ETENDUS ONT PERMIS DE METTRE EN EVIDENCE LE ROLE JOUE PAR LES INTERFACES DANS LE MECANISME DE FUSION. AINSI, ON A PU MONTRER QU'IL EXISTE CLAIREMENT POUR CE MODELE, UNE FUSION DE SURFACE ISOTROPE, CONFORME AUX PREDICTIONS BASEES SUR LES THEORIES DE CHAMP MOYEN. UNE CARACTERISATION ASSEZ FINE DE LA NATURE DU PSEUDO-LIQUIDE DE SURFACE ET DE SA FORMATION A PU ETRE REALISEE. LA DIVERGENCE DE L'EPAISSEUR DE CETTE COUCHE A L'APPROCHE DE LA FUSION S'EFFECTUE SELON UNE LOI LOGARITHMIQUE UNIQUE, INDEPENDANTE DE LA DIRECTION CRISTALLOGRAPHIQUE DE LA SURFACE. UNE SIMULATION D'UN JOINT DE GRAINS A GRAND ANGLE LAISSE PENSER QUE LE MECANISME OBSERVE POUR LA FUSION DE SURFACE PEUT S'ETENDRE A LA FUSION D'INTERFACES INTERNES. EN L'ABSENCE DE DEFAUTS, ON OBSERVE UNE SURCHAUFFE DU CRISTAL ET L'EXISTENCE D'UNE LIMITE SUPERIEURE DE STABILITE THERMOELASTIQUE. CECI RESTE VRAI LORSQUE DES DEFAUTS PONCTUELS SONT INTRODUITS. LES LACUNES MODIFIENT LES PROPRIETES ELASTIQUES DU SYSTEME ET CONDUISENT A UN ABAISSEMENT LINEAIRE DE LA TEMPERATURE DE TRANSITION SOLIDE-LIQUIDE MAIS NE MODIFIENT PAS LE MECANISME DE FUSION. L'ABSENCE DE PREFUSION (APPARITION DE LIQUIDE EN DESSOUS DU POINT DE FUSION D'EQUILIBRE) AUTOUR DE LACUNES RENFORCE L'HYPOTHESE SELON LAQUELLE L'INITIATION DE LA FUSION D'EQUILIBRE NECESSITE LA PRESENCE DE DEFAUTS CRISTALLINS ETENDUS. UNE ETUDE PRELIMINAIRE DE SYSTEMES COMPRENANT DES IMPURETES EN SURFACE A PERMIS DE MONTRER LA FAISABILITE DE SIMULATIONS DE TELS SYSTEMES MIXTES. LE COMPORTEMENT DES IMPURETES FICTIVES INTRODUITES SEMBLE PHYSIQUEMENT REALISTE MAIS LES EFFETS SUR LA FUSION NE SONT PAS, POUR L'INSTANT DECISIFS
Download or read book Uranie written by Camille Flammarion and published by . This book was released on 2019-06-14 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nicolas Camille Flammarion FRAS was a French astronomer and author. He was a prolific author of more than fifty titles, including popular science works about astronomy, several notable early science fiction novels, and works on psychical research and related topics.
Book Synopsis Quantum Mechanics, Volume 3 by : Claude Cohen-Tannoudji
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.
Book Synopsis The Aesthetics of Movement by : Camilla Damkjær
Download or read book The Aesthetics of Movement written by Camilla Damkjær and published by . This book was released on 2005 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal de physique written by and published by . This book was released on 2003 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structure Determination from Powder Diffraction Data by : William I. F. David
Download or read book Structure Determination from Powder Diffraction Data written by William I. F. David and published by OUP Oxford. This book was released on 2002 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our understanding of the properties of materials, from drugs and proteins to catalysts and ceramics, is almost always based on structural information. This book describes the new developments in the realm of powder diffraction which make it possible for scientists to obtain such information even from polycrystalline materials. Written and edited by experts active in the field, and covering both the fundamental and applied aspects of structure solution from powder diffraction data, this book guides both novices and experienced practitioners alike through the maze of possibilities.
Book Synopsis Micelles, Membranes, Microemulsions, and Monolayers by : William M. Gelbart
Download or read book Micelles, Membranes, Microemulsions, and Monolayers written by William M. Gelbart and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last decades, the study of surfactants (detergents, for example) has been profoundly changed by ideas and techniques from physics, chemistry, and materials science. Among these are: self assembly; critical phenomena, scaling, and renormalization; high-resolution scattering, and magnetic resonance spectroscopy. This book represents the first systematic account of these new developments, providing both a general introduction to the subject as well as a review of recent developments. The book will be a very useful tool for the biophysist, biochemist or physical chemist working in the field of surfactants.
Book Synopsis Solution of the Phase Problem. I. The Centrosystemmetric Crystal by : Herbert Aaron Hauptman
Download or read book Solution of the Phase Problem. I. The Centrosystemmetric Crystal written by Herbert Aaron Hauptman and published by . This book was released on 1953 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Crystal Structure Determination by : Werner Massa
Download or read book Crystal Structure Determination written by Werner Massa and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: A concise introduction to modern crystal structure determination, emphasizing both the crystallographic background and the successive practical steps. In the theoretical sections, more importance is attached to a good understanding, than to a rigorous mathematical treatment. The most important measuring techniques, including the use of modern area detectors, and the methods of data reduction, structure solution and refinement are discussed from a practical point of view. Special emphasis is put on the ability to recognize and avoid possible errors and traps, and to judge the quality of results.
Book Synopsis Fundamentals of Crystallography by : Carmelo Giacovazzo
Download or read book Fundamentals of Crystallography written by Carmelo Giacovazzo and published by Oxford University Press. This book was released on 1992 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offers a rigorous treatment of the theory of crystallography and detailed descriptions of experimental applications in a wide range of sciences, including computational aspects, protein crystallography and crystal physics.
Book Synopsis A New Pocket Dictionary of the French and English Languages in Two Parts by : Thomas Nugent
Download or read book A New Pocket Dictionary of the French and English Languages in Two Parts written by Thomas Nugent and published by . This book was released on 1770 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fundamentals of Latex Film Formation by : Joseph Keddie
Download or read book Fundamentals of Latex Film Formation written by Joseph Keddie and published by Springer Science & Business Media. This book was released on 2010-02-18 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has emerged out of our long-time research interests on the topic of latex film formation. Over the years we have built up a repertoire of slides used in conference presentations, short courses and tutorials on the topic. The story presented in this book has thereby taken shape as it has been told and re-told to a mix of academic and industrial audiences. The book presents a wide body of work accumulated by the polymer colloids community over the past five decades, but the selection of examples has been flavoured by our particular experimental interests and development of mathematical models. We intend the book to be a starting point for academic and industrial scientists beginning research on latex film formation. The emphasis is on fundam- tal mechanisms, however, and not on applications nor on specific effects of formu- tions. We hope that the book consolidates the understanding that has been achieved to-date in the literature in a more comprehensive way than is possible in a review article. We trust that the reader will appreciate the fascination of the topic.
Book Synopsis Molecular System Bioenergetics by : Valdur Saks
Download or read book Molecular System Bioenergetics written by Valdur Saks and published by John Wiley & Sons. This book was released on 2008-01-08 with total page 633 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this first integrated view, practically each of the world's leading experts has contributed to this one and only authoritative resource on the topic. Bringing systems biology to cellular energetics, they address in detail such novel concepts as metabolite channeling and medical aspects of metabolic syndrome and cancer.
Book Synopsis Cellular Automata Modeling of Physical Systems by : Bastien Chopard
Download or read book Cellular Automata Modeling of Physical Systems written by Bastien Chopard and published by Cambridge University Press. This book was released on 2005-06-30 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a self-contained introduction to cellular automata and lattice Boltzmann techniques. Beginning with a chapter introducing the basic concepts of this developing field, a second chapter describes methods used in cellular automata modeling. Following chapters discuss the statistical mechanics of lattice gases, diffusion phenomena, reaction-diffusion processes and non-equilibrium phase transitions. A final chapter looks at other models and applications, such as wave propagation and multiparticle fluids. With a pedagogic approach, the volume focuses on the use of cellular automata in the framework of equilibrium and non-equilibrium statistical physics. It also emphasises application-oriented problems such as fluid dynamics and pattern formation. The book contains many examples and problems. A glossary and a detailed bibliography are also included. This will be a valuable book for graduate students and researchers working in statistical physics, solid state physics, chemical physics and computer science.
Book Synopsis The Cinematic Body by : Steven Shaviro
Download or read book The Cinematic Body written by Steven Shaviro and published by U of Minnesota Press. This book was released on 1994 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: A radical approach to film viewing
