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Book Description
LE COMPORTEMENT DE LA POLARISATION D'UN LASER A UN OU DEUX ETATS PROPRES STABLES EST ETUDIE, LORSQU'UN ENTRAINEMENT MAGNETIQUE OU OPTIQUE LUI FAIT QUITTER L'EQUILIBRE. UN RETOUR EST D'ABORD EFFECTUE SUR LA CARACTERISATION DES ETATS PROPRES DU LASER A L'EQUILIBRE. DANS CE BUT, LA MATRICE DE JONES D'UNE LAME INCLINEE A FACES PARALLELES EST REDEFINIE EN TENANT COMPTE DES REFLEXIONS INTERNES ET DE LA NATURE GAUSSIENNE DU FAISCEAU INCIDENT. LES DEUX MECANISMES (ROTATION ET INHIBITION) DE BISTABILITE ENTRE ETATS PROPRES CIRCULAIRES SONT ISOLES. EN FAISANT QUITTER SON EQUILIBRE A UN LASER A UN OU DEUX ETATS PROPRES STABLES PAR UN CHAMP MAGNETIQUE CONTINU (ROTATION DE POLARISATION) ET ALTERNATIF (VIBRATION DE POLARISATION), ON OBTIENT DES INSTABILITES DE POLARISATION. LA NOTION DE CHAMP MAGNETIQUE CRITIQUE EFFECTIF EST INTRODUITE POUR DISTINGUER LES FAIBLES AMPLITUDES DE VIBRATION, POUR LESQUELLES IL EXISTE UNE FREQUENCE DE COUPURE, ET LES GRANDES AMPLITUDES DE VIBRATION, ETABLIES AUTOUR DE L'ETAT PROPRE STABLE OU DE L'ETAT PROPRE INSTABLE. LA SUPERPOSITION DE CES DEUX CHAMPS CONDUIT A DES ACCROCHAGES ENTRE LA ROTATION ET LA VIBRATION, REPRESENTES PAR DES LANGUES D'ARNOLD TORSADEES OU QUASI-TORSADEES. COMME CES INSTABILITES VECTORIELLES NE COMPORTENT PAS DE CHAOS, L'ACTIVATION MAGNETIQUE D'UN MAGNETOMETRE LASER EST ETUDIEE POUR CONTOURNER LA FAIBLE ZONE AVEUGLE. L'INJECTION VECTORIELLE, QUI PERMET AUSSI DE SORTIR LE LASER DE SON ETAT D'EQUILIBRE, PERMET DANS LE CAS D'UN LASER ISOTROPE, LE TRANSFERT TOTAL ET L'ENTRAINEMENT DE LA POLARISATION. POUR UN LASER ANISOTROPE, LE TRANSFERT N'A LIEU QUE SUR LES ETATS PROPRES. POUR UN SEUL ETAT PROPRE STABLE, LA NOTION DE LANGUE D'ADLER EST INTRODUITE, ET LE TRANSFERT DE LA POLARISATION SUR L'ETAT INSTABLE PERMET DE SEPARER SIMPLEMENT LES CONTRIBUTIONS DU MAITRE ET DE L'ESCLAVE. POUR DEUX ETATS PROPRES STABLES, LA POLARISATION EXTERIEURE COMMANDE LE BASCULEMENT ENTRE LES ETATS PROPRES S'ILS SONT EN BISTABILITE
Book Description
LE COMPORTEMENT DE LA POLARISATION D'UN LASER A UN OU DEUX ETATS PROPRES STABLES EST ETUDIE, LORSQU'UN ENTRAINEMENT MAGNETIQUE OU OPTIQUE LUI FAIT QUITTER L'EQUILIBRE. UN RETOUR EST D'ABORD EFFECTUE SUR LA CARACTERISATION DES ETATS PROPRES DU LASER A L'EQUILIBRE. DANS CE BUT, LA MATRICE DE JONES D'UNE LAME INCLINEE A FACES PARALLELES EST REDEFINIE EN TENANT COMPTE DES REFLEXIONS INTERNES ET DE LA NATURE GAUSSIENNE DU FAISCEAU INCIDENT. LES DEUX MECANISMES (ROTATION ET INHIBITION) DE BISTABILITE ENTRE ETATS PROPRES CIRCULAIRES SONT ISOLES. EN FAISANT QUITTER SON EQUILIBRE A UN LASER A UN OU DEUX ETATS PROPRES STABLES PAR UN CHAMP MAGNETIQUE CONTINU (ROTATION DE POLARISATION) ET ALTERNATIF (VIBRATION DE POLARISATION), ON OBTIENT DES INSTABILITES DE POLARISATION. LA NOTION DE CHAMP MAGNETIQUE CRITIQUE EFFECTIF EST INTRODUITE POUR DISTINGUER LES FAIBLES AMPLITUDES DE VIBRATION, POUR LESQUELLES IL EXISTE UNE FREQUENCE DE COUPURE, ET LES GRANDES AMPLITUDES DE VIBRATION, ETABLIES AUTOUR DE L'ETAT PROPRE STABLE OU DE L'ETAT PROPRE INSTABLE. LA SUPERPOSITION DE CES DEUX CHAMPS CONDUIT A DES ACCROCHAGES ENTRE LA ROTATION ET LA VIBRATION, REPRESENTES PAR DES LANGUES D'ARNOLD TORSADEES OU QUASI-TORSADEES. COMME CES INSTABILITES VECTORIELLES NE COMPORTENT PAS DE CHAOS, L'ACTIVATION MAGNETIQUE D'UN MAGNETOMETRE LASER EST ETUDIEE POUR CONTOURNER LA FAIBLE ZONE AVEUGLE. L'INJECTION VECTORIELLE, QUI PERMET AUSSI DE SORTIR LE LASER DE SON ETAT D'EQUILIBRE, PERMET DANS LE CAS D'UN LASER ISOTROPE, LE TRANSFERT TOTAL ET L'ENTRAINEMENT DE LA POLARISATION. POUR UN LASER ANISOTROPE, LE TRANSFERT N'A LIEU QUE SUR LES ETATS PROPRES. POUR UN SEUL ETAT PROPRE STABLE, LA NOTION DE LANGUE D'ADLER EST INTRODUITE, ET LE TRANSFERT DE LA POLARISATION SUR L'ETAT INSTABLE PERMET DE SEPARER SIMPLEMENT LES CONTRIBUTIONS DU MAITRE ET DE L'ESCLAVE. POUR DEUX ETATS PROPRES STABLES, LA POLARISATION EXTERIEURE COMMANDE LE BASCULEMENT ENTRE LES ETATS PROPRES S'ILS SONT EN BISTABILITE
Author: Ahmed Belasri Publisher: Springer Nature ISBN: 9811554447 Category : Technology & Engineering Languages : en Pages : 659
Book Description
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.
Author: Jean-Paul Blaizot Publisher: Mit Press ISBN: 9780262022149 Category : Science Languages : en Pages : 657
Book Description
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.
Author: Vincent C. H. Tong Publisher: Cambridge University Press ISBN: 1107041724 Category : Science Languages : en Pages : 467
Book Description
Taking a transdisciplinary approach to seismology, this unique book reviews the most recent developments in planetary seismology, helioseismology, and asteroseismology.
Author: Dov Dori Publisher: Springer ISBN: 1493932950 Category : Computers Languages : en Pages : 419
Book Description
Model-Based Systems Engineering (MBSE), which tackles architecting and design of complex systems through the use of formal models, is emerging as the most critical component of systems engineering. This textbook specifies the two leading conceptual modeling languages, OPM—the new ISO 19450, composed primarily by the author of this book, and OMG SysML. It provides essential insights into a domain-independent, discipline-crossing methodology of developing or researching complex systems of any conceivable kind and size. Combining theory with a host of industrial, biological, and daily life examples, the book explains principles and provides guidelines for architecting complex, multidisciplinary systems, making it an indispensable resource for systems architects and designers, engineers of any discipline, executives at all levels, project managers, IT professional, systems scientists, and engineering students.
Author: Grégoire Chamayou Publisher: Polity ISBN: 9781509542000 Category : Political Science Languages : en Pages : 350
Book Description
Rebellion was in the air. Workers were on strike, students were demonstrating on campuses, discipline was breaking down. No relation of domination was left untouched – the relation between the sexes, the racial order, the hierarchies of class, relationships in families, workplaces and colleges. The upheavals of the late 1960s and early 1970s quickly spread through all sectors of social and economic life, threatening to make society ungovernable in the eyes of ruling elites. This crisis was also the birthplace of the authoritarian liberalism which continues to cast its shadow across the world in which we now live. To ward off the threat, new arts of government were devised in business-related circles, which included a war against the trade unions, the primacy of shareholder value and a dethroning of politics. The neoliberalism that thus began its triumphal march was not, however, determined by a simple ‘state phobia’ and a desire to free up the economy from government interference. On the contrary, the strategy for overcoming the crisis of governability consisted in an authoritarian liberalism in which the liberalization of society went hand-in-hand with new forms of power imposed from above: a ‘strong state’ for a ‘free economy’ became the new magic formula of our capitalist societies. Grégoire Chamayou analyses this crisis as it was perceived and theorized in the 1970s by those who strove to defend the interests of business – that is, the ruling elites, especially in the United States, from which a far-reaching intellectual and political movement spread. The new arts of government they devised are still with us today and we can understand their nature and lasting influence only by re-examining the history of the conflicts that brought them into being.
Author: United States. Congress. Senate. Committee on Aeronautical and Space Sciences Publisher: ISBN: Category : Artificial satellites, American Languages : en Pages : 352
Author: Bruno Morando Publisher: Springer ISBN: 9783642999680 Category : Technology & Engineering Languages : en Pages : 0
Book Description
This book gathers the proceedings of a symposium on Dynamics of satellites which took place in Prague in May 1969 during the twelfth COSPAR meeting. This symposium was sponsored by the International Astronomical Union, the International Association of Geodesy, the International Union of Theoretical and Applied Mechanics and COSPAR (Committee on Space Research). The organizing committee was composed of Dr. KOVALEVSKY chair man, Dr. Yu. V. BATRAKOV representing IAU, Dr. A. H. COOK for lAG, Dr. D. KING-HELE for COSPAR, Prof. M. Roy for IUTAM and Dr. ROSENBERG. I wish to take advantage of the opportunity to thank, on behalf of all the participants, the organizing committee members, Prof. BUCHAR, Dr. RAJSK:I and Dr. SEHNAL, for the kindness and efficiency of their welcome. The interpreters who translated with virtuosity during the whole symposium also deserve our gratitude. I am grateful also for the care and skill with which Springer-Verlag has printed this volume.
Author: JEAN-CHARLES.. COTTEVERTE
Author: JEAN-CHARLES.. COTTEVERTE
Author: Ahmed Belasri
Author: Jean-Paul Blaizot
Author: Vincent C. H. Tong
Author: Chevalier François Le
Author: Dov Dori
Author: Dimitri P. Bertsekas
Author: Grégoire Chamayou
Author: United States. Congress. Senate. Committee on Aeronautical and Space Sciences
Author: Bruno Morando