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Etude Du Franchissement Des Joints De Grains Sigma
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Book Synopsis Etude du franchissement des joints de grains [sigma] by : Alain Jacques
Download or read book Etude du franchissement des joints de grains [sigma] written by Alain Jacques and published by . This book was released on 1984 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Etude par microscopie optique, topographie et microscopie électronique en transmission du franchissement d'un joint de grain par les dislocations dans deux types de bicristaux de si, obtenus par tirage Czochralski, et présentant des joints de flexion symétriques de grand angle correspondant aux positions de macle sigma = 9 et sigma =25. Calculs des cissions exercées sur les systèmes de glissement du cristal ii par des dislocations du cristal i empilées contre le plan du joint. Détermination des vecteurs de burgers des dislocations intergranulaires extrinsèques résultant. Etude des facteurs, liés à la cristallographie, facilitant le franchissement du joint
Book Synopsis Étude du franchissement des joints de grains SIGMA by : Alain Jacques (auteur d'une thèse de sciences.)
Download or read book Étude du franchissement des joints de grains SIGMA written by Alain Jacques (auteur d'une thèse de sciences.) and published by . This book was released on 1984 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ETUDE DU JOINT DE GRAINS SIGMA 9 DANS LE SILICIUM PAFAIT, DEFORME ET RECUIT PAR MICROSCOPIE ELECTRONIQUE A HAUTE RESOLUTION by : Mohamed El- Kajbaji
Download or read book ETUDE DU JOINT DE GRAINS SIGMA 9 DANS LE SILICIUM PAFAIT, DEFORME ET RECUIT PAR MICROSCOPIE ELECTRONIQUE A HAUTE RESOLUTION written by Mohamed El- Kajbaji and published by . This book was released on 1986 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE DES MECANISMES D'INTERACTION JOINT DE GRAIN DISLOCATIONS LORS DE LA DEFORMATION DU BICRISTAL, METTANT EN EVIDENCE LA DISSOCIATION DES DISLOCATIONS ENTRANT DANS LE JOINT, LEUR PERTE D'IDENTITE ET L'INTERACTION ENTRE EUX DES RESIDUS. DETERMINATION DES STRUCTURES DES DISLOCATIONS RESIDUELLES. APPARITION DE PRECIPITES LORS DU RECUIT DU BICRISTAL DEFORME
Book Synopsis Evolution structurale du joint de grains [sigma] by : Jean-Luc Putaux
Download or read book Evolution structurale du joint de grains [sigma] written by Jean-Luc Putaux and published by . This book was released on 1991 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Etude de joints de grains dans des substrats bicristallins sigma 13 de SrTiO3 et dans les films minces YBa2Cu3O7-delta épitaxiés by : Guillaume Passerieux
Download or read book Etude de joints de grains dans des substrats bicristallins sigma 13 de SrTiO3 et dans les films minces YBa2Cu3O7-delta épitaxiés written by Guillaume Passerieux and published by . This book was released on 2002 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'étude a pour objectif de comprendre le rôle de la croissance d'un film sur la structure d'un joint de grains lorsqu'il est épitaxie par co-évaporation réactive sur un substrat bicristallin. La technique de diffraction élecronique LACBED a permis de déterminer la contribution des composantes de flexion et de torsion des substrats bicristallins SrTi03'Sigma'13 (22,6ʻ) permettant de compléter les analyses structurales à l'échelle atomique. Le joint de grains symétrique 67,4ʻ présente deux régions de joint de structures différentes et nouvelles. Chaque partie est décrite par deux unités centrées sur le titane puis sur le strontium, séparées par une unité structurale différente. Celle-ci constituant le joint 'Sigma'1 (90ʻ) de plus forte désorientation rend compte de la composante de flexion supplémentaire valant 0,65ʻ. L'ensemble des résultats issus de la caractérisation structurale des films a permis de montrer que la croissance est le facteur déterminant en ce qui concerne la structure des joints de grains d'YBCO. Le facteur cinétique de la croissance est prépondérant par rapport au facteur thermodynamique. Les facteurs cristallographiques liés au substrat et à celui de l'épitaxie sont importants au début du dépôt, et dés lors que le film croît, c'est la cinétique de croissance qui va déterminer la frontière entre îlots au niveau du joint de grains. Les résultats importants issus de ce travail sont: On observe une différence entre la désorientation autour de l'axe [001] du substrat et celle de nos films. Le joint de grains affecte l'épitaxie en tant que zone de compétition entre les îlots de croissance qui crée une désorientation supplémentaire. Le joint de grains du substrat semble être là sans action sur la structure finale du joint de grains du film YBCO. La croissance a donc 2 rôles: créer explicitement un recouvrement des films avec le grain du substrat désorienté et des films entre eux (analyse des moirés); créer implicitement un facettage du joints de grains du film selon les directions 100 et 110 énergétiquement favorables, représentant les facettes des îlots de croissance.Seul la connaissance complète de la structure de joints de grains YBCO permet de prendre en compte tous les paramètres dans les calculs théoriques du courant critique afin de reproduire les expériences réelles et ainsi en prédire les propriétés.
Book Synopsis Cell and Molecular Biology of Artemia Development by : A. Warner
Download or read book Cell and Molecular Biology of Artemia Development written by A. Warner and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: The brine shrimp Artemia has become an important experimental system for studies of the developmental process. In recent years the shrimp has yielded considerable information on the pattern of development, bio chemistry, and gene structure and expression of crustaceans. This book is a compilation of research activity from twenty five of the most active re search laboratories working with brine shrimp in the above areas. It also represents the proceedings of a NATO Advanced Research Workshop held in Montreal, Canada, August 11-13, 1988. The book contains twenty nine full papers covering the major areas discussed at the workshop. In addition, one page abstracts representing seventeen poster presentations which were given at the workshop, and which were deemed to be most relevant to the theme of the book, are included. These are designated with an [al in the Table of Contents following the title of each paper. A considerable amount of discussion which took place during the workshop has not been included in the book because of space limitations. However, the editors will endeavour to make some of this in formation available at a later date through the Artemia Newsletter. In addition to the high percentage of invited speakers who attended and contributed to the workshop, the organizers would like to thank a number of participants who made valuable contributions to the major dis cussion sessions. These include: John Freeman, Michael Horst, Herman Slegers, Jack Vaughn, Frank Conte, Sandy McLennan, Clive Trotman and Patrick Sorgeloos.
Download or read book The Polar Cusp written by J.A. Holtet and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings are based upon introductory talks, research reports and discussions from the NATO Advanced Workshop on the "Morphology and Dynamics of the Polar Cusp", held at Lillehammer, Norway, 7-12 May, 1984. The upper atmosphere at high latitudes is called the "Earth's win dow to outer space". Through various electrodynamic coupling process es as well as through direct transfer of particles many geophysical effects displayed there are direct manifestations of phenomena occurring in the deep space. The high latitude ionosphere will also exert a feedback on the regions of the magnetosphere and atmosphere to which it is coupled, acting as a momentum and energy source and sink, and a source of particles. Of particular interest are the sections of the near space known as the Polar Cusp. A vast portion of the earth's magnetic field envelope is electrically connected to these regions. This geometry results in a spatial mapping of the magnetospheric pro cesses and a focusing on to the ionosphere. In the Polar Cusps the solar wind plasma has also direct access to the upper atmosphere. The polar regions are thus of extreme importance when it comes to under standing the physical processes in the near space and their effect on our environment. The Introductory Talks given at this workshop provided a common background for discussing and understanding the physics of the Polar Cusp. By this book we will make the information which thus was provid ed to the participants of the workshop accessible to a wider audience.
Book Synopsis Physiology of Cold Adaptation in Birds by : Claus Bech
Download or read book Physiology of Cold Adaptation in Birds written by Claus Bech and published by Springer. This book was released on 2014-11-14 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Workshop held June 1988. Thirty-nine contributions treat the central mechanisms of thermoregulation, heat production, metabolic adaptations, respiration and circulation, physiology of hypometabolism, breeding and incubation, and adaptations to cold in chicks. Annotation copyright Book News, Inc. Portland, Or.
Book Synopsis Evolutionary Tinkering in Gene Expression by : M. Grunberg-Manago
Download or read book Evolutionary Tinkering in Gene Expression written by M. Grunberg-Manago and published by Springer. This book was released on 2012-12-27 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Workshop on "Evolutionary Tinkering in Gene Expression" which was held at the end of August 1988. was planned to celebrate 20 successful Advanced Study Institutes (A. S. I.) in Molecular and Cell Biology. The first Institute was held in 1966 on the Island of Spetsai. after a N. A. T. O. suggestion and was entirely financed by N. A. T. O. The success was immediately so great that the Institute grew very rapidly and in the following years. N. A. T. O .• E. M. B. O. (since 1972) and F. E. B. S. (since 1981) co-sponsored it. Since the start of the AS!. the U. S. National Science Foundation has granted travel money for a limited number of American participants each year. In addition. the course was supported by minor industrial subsidies of varying amounts which enabled the organizers to improve some of the local facilities particularly with respect to the lecture hall. In particular. Boehringer Mannheim has contributed since 1966. Furthermore. the Greek Ministry of Science and Culture has provided support at least for a social event during each ASI.
Book Synopsis Living Without Oxygen by : Peter W. Hochachka
Download or read book Living Without Oxygen written by Peter W. Hochachka and published by . This book was released on 1980 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Innumerable clinical problems have as their basis some derangement in oxygen-dependent metabolism. To explore mechanisms of adjusting to oxygen limitation, Living without Oxygen presents a bestiary of exotic anaerobes that illuminate elements of metabolic biochemistry only dimly seen in studies using standard experimental animals. With their exaggerated anaerobic capabilities, Hochachka's diving mammals, airbreathing fishes, and hypoxia-adapted lower vertebrates allow a detailed assessment of what can and what cannot be adjusted in the process of extending hypoxia tolerance. The book places the enzymatic and biochemical machinery firmly in the biological context and assumes only a modest familiarity with bioenergetics and metabolic biochemistry. The author's clear prose should make this technical presentation pleasantly unintimidating for any physiologist, biochemist, or clinical investigator. The insights of his unique approach make Living without Oxygen essential reading.
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