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Author: Jean-Pierre Guillot (auteur d'une thèse de physique).)
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Author: Jean-Pierre Guillot (auteur d'une thèse de physique).)
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Book Description
Author: Jean-Pierre Guillot (auteur d'une thèse de physique).)
Publisher:
ISBN:
Category :
Languages : fr
Pages : 235
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Book Description
LE TRAVAIL CONSTITUANT L'ESSENTIEL DE CE MEMOIRE PORTE SUR L'ELABORATION DE DEUX MODELES MACROSCOPIQUES DES ZONES CATHODIQUES ET ANODIQUES DE L'ARC ELECTRIQUE ET SOUMIS A RESOLUTION NUMERIQUE. UN MODELE PHYSIQUE, MACROSCOPIQUE, STATIONNAIRE, PERMET DE CALCULER LES PRINCIPALES GRANDEURS PHYSIQUES CARACTERISTIQUES DES PIEDS D'ARC EN FONCTION DE L'INTENSITE DU COURANT ET DES CONSTANTES PHYSIQUES DU MATERIAU D'ELECTRODE. IL EST APPLIQUE A DES METAUX PURS, AG, CU, HG ET W, AINSI QU'AUX OXYDES AVEC L'ARGENT, UTILISE COMME MATERIAU DE CONTACT DANS LES APPAREILS DE COUPURE. LE SECOND MODELE EST MICROSCOPIQUE ET DYNAMIQUE ; IL DECRIT L'EVOLUTION TEMPORELLE D'UN CRATERE, CONSTITUANT ELEMENTAIRE DU PIED D'ARC, ET PERMET DE SIMULER LES PHENOMENES DE FORMATION ET DE DEPLACEMENT DES ENSEMBLES DE CRATERES OU SPOTS. L'EFFET DE CHAMP MAGNETIQUE EXTERIEUR EST ETUDIE. LE CALCUL EST EFFECTUE POUR CU, AG, W SOUS VIDE ET A LA PRESSION ATMOSPHERIQUE. LES INTERFACES ENTRE LES PIEDS D'ARC ET LA COLONNE SONT ETUDIES MACROSCOPIQUEMENT AVEC UN MODELE COUCHE PAR COUCHE. LE CALCUL NUMERIQUE POUR CU ET AG CONDUIT AUX PRINCIPALES GRANDEURS PHYSIQUES CARACTERISANT CET ESPACE DE TRANSITION: TEMPERATURES ET CONCENTRATIONS DES PARTICULES. LES RESULTATS DES CALCULS NUMERIQUES ONT ETE CONFRONTES AUX VALEURS EXPERIMENTALES. LA VALIDATION PROVIENT DES MESURES EXPERIMENTALES DES DIMENSIONS DES TACHES CATHODIQUES ET ANODIQUES EFFECTUEES AVEC DES MATERIAUX DE CONTACT CU, AG, AGNI (60/40), AGWC (50/50), AGCDO (90/10), AGZNO (92/8), AGSNO#2 (86/14)
Author: Carl Gustav Carus
Publisher: Getty Publications
ISBN: 9780892366743
Category : Art
Languages : en
Pages : 200
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Book Description
Carl Gustav Carus (1789-1869)--court physician to the king of Saxony--was a naturalist, amateur painter, and theoretician of landscape painting whose Nine Letters on Landscape Painting is an important document of early German romanticism and an elegant appeal for the integration of art and science. Carus was inspired by and had contacts with the greatest German intellectuals of his day. Carus prefaced his work with a letter from his correspondence with Johann Wolfgang von Goethe, who was his primary mentor in both science and art. His writings also reflect, however, the influence of the German natural philosopher Friedrich Wilhelm Joseph Schelling, especially Schelling's notion of a world soul, and the writings of the naturalist and explorer Alexander von Humboldt. Carus played a role in the revolution in landscape painting taking place in Saxony around Caspar David Friedrich. The first edition appears here in English for the first time.
Author: H. R. Sasse
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 792
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Book Description
Preface Adhesion is a phenomenon architects and civil engineers are not very familiar with. In other disciplines knowledge about surface properties and the background of bonding energies is also far from satisfactory; nevertheless there are many important· applications in concrete engineering, where adhesion is necessary for success and durability. These include: - coating and painting - repair of concrete surfaces - bonding of fresh to old concrete - crack injection - glueing of precast elements - glueing of steel to concrete, etc. In 1981 RILEM established the technical committee 52-RAC 'Resin Adherence to Concrete'. The main aims of the committee's work were - to collect research results and practical experiences - to initiate and coordinate research programs - to develop, on a scientific base, test methods for field and for laboratory purposes. One of the results of the committee's work is a state-of-the-art report, which will be presented orally as a General Report at the International Symposium ISAP '86, and will be printed either in the RILEM journal Materials and Structures or separately. Several test recommendations have been elaborated and will be prepared as drafts for the participants ofISAP '86. These are: - direct tensile test - pull-off test - direct shear test - slant shear test - four-point bending test - dynamic loading test - thermal compatibility test (two versions) - injectibility test.
Author: Claude Cohen-Tannoudji
Publisher: John Wiley & Sons
ISBN: 3527345558
Category : Science
Languages : en
Pages : 790
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Book Description
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.
Author: P. Petitjean
Publisher: Springer Science & Business Media
ISBN: 9401125945
Category : Science
Languages : en
Pages : 419
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Book Description
SCIENCE AND EMPIRES: FROM THE INTERNATIONAL COLLOQUIUM TO THE BOOK Patrick PETITJEAN, Catherine JAMI and Anne Marie MOULIN The International Colloquium "Science and Empires - Historical Studies about Scientific De velopment and European Expansion" is the product of an International Colloquium, "Sciences and Empires - A Comparative History of Scien tific Exchanges: European Expansion and Scientific Development in Asian, African, American and Oceanian Countries". Organized by the REHSEIS group (Research on Epistemology and History of Exact Sciences and Scientific Institutions) of CNRS (National Center for Scientific Research), the colloquium was held from 3 to 6 April 1990 in the UNESCO building in Paris. This colloquium was an idea of Professor Roshdi Rashed who initiated this field of studies in France some years ago, and proposed "Sciences and Empires" as one of the main research programmes for the The project to organize such a colloquium was a bit REHSEIS group. of a gamble. Its subject, reflected in the title "Sciences and Empires", is not a currently-accepted sub-discipline of the history of science; rather, it refers to a set of questions which found autonomy only recently. The terminology was strongly debated by the participants and, as is frequently suggested in this book, awaits fuller clarification.
Author: Vadim S. Fomenko
Publisher: Springer
ISBN: 9780306651175
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
The current rapid development of cathode electronics has led fanned by their widespread use as cathode materials. A whole new section on the thermionic properties of aluminides has to extensive investigations of the emission properties of chemical el ements and their compounds. This expansion of research is aimed at been introduced. The list of pertinent literature has been aug the continual refinement of data already available and the steady widen mented by new contributions published in the years 1963-1965, ing of the circle of materials under investigation. These events have as well as some earlier publications that had escaped notice in the necessitated a whole series of additions and changes in this handbook, Russian edition. even though the original Russian edition was published only in 1964. It is the author's hope that the handbook will prove of great val Every effort has been made to include all available information ue to American readers interested in the emission properties of the on each element or compound. Particular attention has been given to elements and compounds, and that it will contribute to the further bringing the sections on borides and carbides of the transition and rare development of research in this promising and most timely field of metals up to date, since interest in these compounds has recently been electronics.
Author: W. Maurice Pritchard
Publisher:
ISBN:
Category : Nuclear science
Languages : en
Pages : 48
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Book Description
Author: United States. Office of Armed Forces Information and Education
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Author: Danilo Capecchi
Publisher: Springer Nature
ISBN: 3030528529
Category : Technology & Engineering
Languages : en
Pages : 567
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Book Description
This book documents the process of transformation from natural philosophy, which was considered the most important of the sciences until the early modern era, into modern disciplines such as mathematics, physics, natural history, chemistry, medicine and engineering. It focuses on the 18th century, which has often been considered uninteresting for the history of science, representing the transition from the age of genius and the birth of modern science (the 17th century) to the age of prodigious development in the 19th century. Yet the 18th century, the century of Enlightenment, as will be demonstrated here, was in fact characterized by substantial ferment and novelty. To make the text more accessible, little emphasis has been placed on the precise genesis of the various concepts and methods developed in scientific enterprises, except when doing so was necessary to make them clear. For the sake of simplicity, in several situations reference is made to the authors who are famous today, such as Newton, the Bernoullis, Euler, d’Alembert, Lagrange, Lambert, Volta et al. – not necessarily because they were the most creative and original minds, but mainly because their writings represent a synthesis of contemporary and past studies. The above names should, therefore, be considered more labels of a period than references to real historical characters.
