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De La Frustration Et Du Desordre Dans Les Chaines Et Les Echelles De Spins Quantiques
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Book Synopsis De la frustration et du désordre dans les chaînes et les échelles de spins quantiques by : Arthur Lavarelo
Download or read book De la frustration et du désordre dans les chaînes et les échelles de spins quantiques written by Arthur Lavarelo and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans les systèmes de spins quantiques, la frustration et la basse dimensionnalité génèrent des fluctuations quantiques et donnent lieu à des phases exotiques. Cette thèse étudie un modèle d'échelle de spins avec des couplages frustrants le long des montants, motivé par les expériences sur le cuprate BiCu2PO6. Dans un premier temps, on présente une méthode variationnelle originale pour décrire les excitations de basse énergie d'une seule chaîne frustrée. Le diagramme de phase de deux chaînes couplées est ensuite établi à l'aide de méthodes numériques. Le modèle exhibe une transition de phase quantique entre une phase dimérisée est une phase à liens de valence résonnants (RVB). La physique de la phase RVB et en particulier l'apparition de l'incommensurabilité sont étudiées numériquement et par un traitement en champ moyen. On étudie ensuite les effets d'impuretés non-magnétiques sur la courbe d'aimantation et la loi de Curie à basse température. Ces propriétés magnétiques sont tout d'abord discutées à température nulle à partir d'arguments probabilistes. Puis un modèle effectif de basse énergie est dérivé dans la théorie de la réponse linéaire et permet de rendre compte des propriétés magnétiques à température finie. Enfin, on étudie l'effet d'un désordre dans les liens, sur une seule chaîne frustrée. La méthode variationnelle, introduite dans le cas non-désordonné, donne une image à faible désordre de l'instabilité de la phase dimérisée, qui consiste en la formation de domaines d'Imry-Ma délimités par des spinons localisés. Ce résultat est finalement discuté à la lumière de la renormalisation dans l'espace réel à fort désordre.
Book Synopsis DESORDRE PARTIEL ET TRANSITIONS DE PHASE DANS DES SYSTEMES DE SPINS QUANTIQUES ET CLASSIQUES FRUSTRES by : ROCCO.. QUARTU
Download or read book DESORDRE PARTIEL ET TRANSITIONS DE PHASE DANS DES SYSTEMES DE SPINS QUANTIQUES ET CLASSIQUES FRUSTRES written by ROCCO.. QUARTU and published by . This book was released on 1997 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: MES TRAVAUX DE RECHERCHE SONT CENTRES SUR L'ETUDE DES SYSTEMES DE SPIN FRUSTRES. LA FRUSTRATION A LIEU LORSQUE LES SPINS NE PEUVENT TROUVER UNE ORIENTATION LOCALE PERMETTANT DE MINIMISER SIMULTANEMENT TOUTES LES ENERGIES DE LIAISON. LES SYSTEMES FRUSTRES ONT DES PHASES COMPLEXES NE POUVANT ETRE TRAITEES EFFICACEMENT PAR LES METHODES TRADITIONNELLES. LE BUT DE MON TRAVAIL EST DOUBLE : 1) AMELIORER UNE DE CES METHODES, LA METHODE DES FONCTIONS DE GREEN, POUR L'APPLIQUER A DES SYSTEMES AYANT UNE CONFIGURATION DE SPINS NON COLINEAIRES ET CHERCHER DES EFFETS NOUVEAUX DUS A LA FRUSTRATION DANS DES SYSTEMES DE SPINS QUANTIQUES. LA METHODE A ETE AMELIOREE EN PERMETTANT AUX AXES DE QUANTIFICATION DES SPINS DE VARIER AVEC LA TEMPERATURE. 2) FAIRE DES CALCULS DE SIMULATION MONTE-CARLO SUR DES SPINS CLASSIQUES AFIN DE LES COMPARER AUX RESULTATS ANALYTIQUES. LES RESULTATS OBTENUS MONTRENT QUE LA COMBINAISON DE CES DEUX METHODES PERMET DE COMPRENDRE EN PROFONDEUR CERTAINS PHENOMENES COMPLIQUES TELS QUE LE DESORDRE PARTIEL ET LA REENTRANCE TROUVES DANS CE TRAVAIL DE THESE POUR DES SPINS NON ISING. NOUS AVONS ETUDIE LE MODELE DE HEISENBERG QUANTIQUE ET CLASSIQUE SUR UN RESEAU CUBIQUE CENTRE POSSEDANT DES INTERACTIONS ENTRE PREMIERS ET SECONDS VOISINS. NOS RESULTATS MONTRENT, POUR LA PREMIERE FOIS, UNE PHASE PARTIELLEMENT ORDONNEE DANS UN MODELE DE SPINS HEISENBERG QUANTIQUES. NOUS AVONS ETUDIE LE SYSTEME HELIMAGNETIQUE TETRAGONAL CENTRE AVEC DES SPINS XY ET HEISENBERG QUANTIQUES ET CLASSIQUES. LE RESULTAT MONTRE L'APPARITION DE LA PHASE ANTIFERROMAGNETIQUE ET LA CONFIRMATION DE LA VARIATION DE L'ANGLE DE L'HELICE EN FONCTION DE LA TEMPERATURE. NOUS AVONS ETUDIE L'EMPILEMENT D'UN MODELE DE VILLAIN EN DAMIER QUANTIQUE ET CLASSIQUE DIVISE EN CELLULES ALTERNATIVEMENT FRUSTREES ET NON FRUSTREES (LE MODELE INITIAL DE VILLAIN EST COMPLETEMENT FRUSTRE). IL APPARAIT, A HAUTE TEMPERATURE, UNE PHASE PARTIELLEMENT ORDONNEE. PAR AILLEURS, LES SIMULATIONS NUMERIQUES, MONTRENT L'EXISTENCE D'UNE PHASE REENTRANTE : CE PHENOMENE N'A JAMAIS ETE OBSERVE AVEC DES SPINS NON-ISING. NOTONS ENFIN QUE LA TRANSITION DE LA PHASE NON COLINEAIRE VERS LA PHASE PARAMAGNETIQUE EST DU PREMIER ORDRE.
Book Synopsis Your Mindful Compass by : Andrea Maloney Schara
Download or read book Your Mindful Compass written by Andrea Maloney Schara and published by . This book was released on 2013-12-01 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Your Mindful Compass" takes us behind the emotional curtain to see the mechanisms regulating individuals in social systems. There is great comfort and wisdom in knowing we can increase our awareness to manage the swift and ancient mechanisms of social control. We can gain greater flexibility by seeing how social controls work in systems from ants to humans. To be less controlled by others, we learn how emotional systems influence our relationship-oriented brain. People want to know what goes on in families that give rise to amazing leaders and/or terrorists. For the first time in history we can understand the systems in which we live. The social sciences have been accumulating knowledge since the early fifties as to how we are regulated by others. S. Milgram, S. Ashe, P. Zimbardo and J. Calhoun, detail the vulnerability to being duped and deceived and the difficulty of cooperating when values differ. Murray Bowen, M.D., the first researcher to observe several live-in families, for up to three years, at the National Institute of Mental Health. Describing how family members overly influence one another and distribute stress unevenly, Bowen described both how symptoms and family leaders emerge in highly stressed families. Our brain is not organized to automatically perceive that each family has an emotional system, fine-tuned by evolution and "valuing" its survival as a whole, as much as the survival of any individual. It is easier to see this emotional system function in ants or mice but not in humans. The emotional system is organized to snooker us humans: encouraging us to take sides, run away from others, to pressure others, to get sick, to blame others, and to have great difficulty in seeing our part in problems. It is hard to see that we become anxious, stressed out and even that we are difficult to deal with. But "thinking systems" can open the doors of perception, allowing us to experience the world in a different way. This book offers both coaching ideas and stories from leaders as to strategies to break out from social control by de-triangling, using paradoxes, reversals and other types of interruptions of highly linked emotional processes. Time is needed to think clearly about the automatic nature of the two against one triangle. Time and experience is required as we learn strategies to put two people together and get self outside the control of the system. In addition, it takes time to clarify and define one's principles, to know what "I" will or will not do and to be able to take a stand with others with whom we are very involved. The good news is that systems' thinking is possible for anyone. It is always possible for an individual to understand feelings and to integrate them with their more rational brains. In so doing, an individual increases his or her ability to communicate despite misunderstandings or even rejection from important others. The effort involved in creating your Mindful Compass enables us to perceive the relationship system without experiencing it's threats. The four points on the Mindful Compass are: 1) Action for Self, 2) Resistance to Forward Progress, 3) Knowledge of Social Systems and the 4) The Ability to Stand Alone. Each gives us a view of the process one enters when making an effort to define a self and build an emotional backbone. It is not easy to find our way through the social jungle. The ability to know emotional systems well enough to take a position for self and to become more differentiated is part of the natural way humans cope with pressure. Now people can use available knowledge to build an emotional backbone, by thoughtfully altering their part in the relationship system. No one knows how far one can go by making an effort to be more of a self-defined individual in relationships to others. Through increasing emotional maturity, we can find greater individual freedom at the same time that we increase our ability to cooperate and to be close to others.
Book Synopsis Interaction and Market Structure by : Domenico Delli Gatti
Download or read book Interaction and Market Structure written by Domenico Delli Gatti and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of essays which examine how the properties of aggregate variables are influenced by the actions and interactions of heterogenous individuals in different economic contexts. The common denominator of the essays is a critique of the representative agent hypothesis. If this hypothesis were correct, the behaviour of the aggregate variable would simply be the reproduction of individual optimising behaviour. In the methodology of the hard sciences, one of the achievements of the quantum revolution has been the rebuttal of the notion that aggregate behaviour can be explained on the basis of the behaviour of a single unit: the elementary particle does not even exist as a single entity but as a network, a system of interacting units. In this book, new tracks in economics which parallel the developments in physics mentioned above are explored. The essays, in fact are contributions to the analysis of the economy as a complex evolving system of interacting agents.
Book Synopsis Geographies of Disorientation by : Marcella Schmidt di Friedberg
Download or read book Geographies of Disorientation written by Marcella Schmidt di Friedberg and published by Routledge. This book was released on 2017-08-10 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spatial disorientation is of key relevance to our globalized world, eliciting complex questions about our relationship with technology and the last remaining vestiges of our animal nature. Viewed more broadly, disorientation is a profoundly geographical theme that concerns our relationship with space, places, the body, emotions, and time, as well as being a powerful and frequently recurring metaphor in art, philosophy, and literature. Using multiple perspectives, lenses, methodological tools, and scales, Geographies of Disorientation addresses questions such as: How do we orient ourselves? What are the cognitive and cultural instruments that we use to move through space? Why do we get lost? Two main threads run through the book: getting lost as a practice, explored within a post-phenomenological framework in relation to direct and indirect observation, wayfinding performances, and the various methods and tools used to find our position in space; and disorientation as a metaphor for the contemporary era, used in a broad range of contexts to express the difficulty of finding points of reference in the world we live in. Drawing on a wide range of literature, Geographies of Disorientation is a highly original and intruiging read which will be of interest to scholars of human geography, philosophy, sociology, anthropology, cognitive science, information technology, and the communication sciences.
Book Synopsis The Politics of Emotional Shockwaves by : Ana Falcato
Download or read book The Politics of Emotional Shockwaves written by Ana Falcato and published by Springer Nature. This book was released on 2021-02-08 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: This interdisciplinary volume brings together specialists from different backgrounds to deliver expert views on the relationship between morality and emotion, putting a special emphasis on issues related to emotional shocks. One of the distinctive aspects of social existence today is our subjection to traumatic events on a global scale, and our subsequent embodiment of the emotional responses these events provoke. Covering various methodological angles, the contributors ensure careful and heterogeneous reflection on this delicate topic. With eleven original essays, the collection spans a wide variety of fields from philosophy and literary theory, to the visual arts, history, and psychology. The authors cover diverse themes, including philosophical approaches to political polarization; the impact of negative emotions such as anger on inter-relational balance; humour and politics; media and the idea of progress; photography and trauma discourse; democratic morality in modern Indian society; emotional olfactory experiences; phenomenological readings of spatial disorientation, and the significance of moral shocks. This timely volume offers crucial perspectives on contemporary questions relating to ethical behaviours, and the challenges of a globalized society on the verge of political, financial and emotional collapse.
Book Synopsis The Art of Being a Parasite by : Claude Combes
Download or read book The Art of Being a Parasite written by Claude Combes and published by University of Chicago Press. This book was released on 2020-06-05 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Parasites are a masterful work of evolutionary art. The tiny mite Histiostoma laboratorium, a parasite of Drosophila, launches itself, in an incredible display of evolutionary engineering, like a surface-to-air missile at a fruit fly far above its head. Gravid mussels such as Lampsilis ventricosa undulate excitedly as they release their parasitic larval offspring, conning greedy predators in search of a tasty meal into hosting the parasite. The Art of Being a Parasite is an extensive collection of these and other wonderful and weird stories that illuminate the ecology and evolution of interactions between species. Claude Combes illustrates what it means to be a parasite by considering every stage of its interactions, from invading to reproducing and leaving the host. An accessible and engaging follow-up to Combes's Parasitism, this book will be of interest to both scholars and nonspecialists in the fields of biodiversity, natural history, ecology, public health, and evolution.
Download or read book Creating Futures written by Michel Godet and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reason, Illusion, and Passion by : Émilie du Châtelet
Download or read book Reason, Illusion, and Passion written by Émilie du Châtelet and published by . This book was released on 2019-09-16 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The amazing scientist, mathematician, philosopher Émilie du Châtelet (1706-49) has widely been hailed as a rare female intellectual in the Enlightenment. At the same time, her own ideas and contributions remain largely unknown and her writings are rarely read. This is unfortunate, since she has interesting contributions to and explanations of physics, metaphysics, religion, translation, the equality of the sexes, and ethics.This book is a selection of du Châtelet's philosophical writings, in new English translations: -Foreword to "Foundations of Physics"-On the Principles of Our Knowledge (From "Foundations of Physics")-On the Existence of God (From "Foundations of Physics")-On Liberty-Translator's Preface to Mandeville's "Fable of the Bees"-On the Resurrection of the Dead (from "Examinations of the Bible")-On Happiness
Book Synopsis The Philosophy of GIS by : Timothy Tambassi
Download or read book The Philosophy of GIS written by Timothy Tambassi and published by Springer. This book was released on 2019-06-04 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: This anthology aims to present the fundamental philosophical issues and tools required by the reflection within and upon geography and Geographic Information Systems (GIS) . It is an introduction to the philosophy for GIScience from an analytical perspective, which looks at GIS with a specific focus on its fundamental and most general concepts and distinctions. The first part of the book is devoted to explore some of the main philosophical questions arising from GIS and GIScience, which include, among others, investigations in ontology, epistemology, linguistics and geometrical modeling. The second part concerns issues related to spatial and cartographical representations of the geographical world. The third part is focused on the ontology of geography, specifically in terms of geographical entities, objects and boundaries. Finally, in the fourth part, the topic of GIS constitutes a starting point for exploring themes such as quantum geography and disorientation, and for defining professional profiles for geographers with competences in GIS environment. This book on a new and unexplored field of research could be a fundamental point of reference for professional philosophers and geographers interested in the theoretical reflection about the foundational concepts of GIScience. It is also interesting reading material for students (both undergraduates, postgraduates and Ph.D. students) in philosophy, geography, applied ontology, GIScience, geomatics and computer science.
Book Synopsis Physical Properties of Amorphous Materials by : David Adler
Download or read book Physical Properties of Amorphous Materials written by David Adler and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Institute for Amorphous Studies was founded in 1982 as the international center for the investigation of amorphous mate rials. It has since played an important role in promoting the und er standing of disordered matter in general. An Institute lecture series on "Fundamentals of Amorphous Materials and Devices" was held during 1982-83 with distinguished speakers from universities and industry. These events were free and open to the public ,and were attended by many representatives of the scientific community. The lectures themselves were highly successful inasmuch as they provided not only formal instruction but also an opportunity for vigorous and stimulating debate. That last element could not be captured within the pages of a book I but the lectures concentrated on the latest advances in the field I which is why their essential contents are he re reproduced in collective form. Together they constitute an interdisciplinary status report of the field. The speakers brought many different viewpoints and a variety of back ground experiences io bear on the problems involved I but though language and conventions vary I the essential unity of the concerns is very clear I as indeed are the ultimate benefits of the many-sided approach.
Book Synopsis Memory Evolutive Systems; Hierarchy, Emergence, Cognition by : A C Ehresmann
Download or read book Memory Evolutive Systems; Hierarchy, Emergence, Cognition written by A C Ehresmann and published by Elsevier. This book was released on 2007-05-25 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: Memory Evolutive Systems; Hierarchy, Emergence, Cognition provides comprehensive and comprehensible coverage of Memory Evolutive Systems (MEM). Written by the developers of the MEM, the book proposes a mathematical model for autonomous evolutionary systems based on the Category Theory of mathematics. It describes a framework to study and possibly simulate the structure of living systems and their dynamic behavior. This book contributes to understanding the multidisciplinary interfaces between mathematics, cognition, consciousness, biology and the study of complexity. It is organized into three parts. Part A deals with hierarchy and emergence and covers such topics as net of interactions and categories; the binding problem; and complexifications and emergence. Part B is about MEM while Part C discusses MEM applications to cognition and consciousness. The book explores the characteristics of a complex evolutionary system, its differences from inanimate physical systems, and its functioning and evolution in time, from its birth to its death. This book is an ideal reference for researchers, teachers and students in pure mathematics, computer science, cognitive science, study of complexity and systems theory, Category Theory, biological systems theory, and consciousness theory. It would also be of interest to both individuals and institutional libraries. Comprehensive and comprehensible coverage of Memory Evolutive System Written by the developers of the Memory Evolutive Systems Designed to explore the common language between sciences
Book Synopsis From Technological to Virtual Art by : Frank Popper
Download or read book From Technological to Virtual Art written by Frank Popper and published by . This book was released on 2007 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frank Popper traces the development of immersive, interactive new media art from its antecedents through today's digital, multimedia, & networked art.
Book Synopsis Lamia Joreige by : Patricia Falguières
Download or read book Lamia Joreige written by Patricia Falguières and published by . This book was released on 2018 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Wonder Approach by : Catherine L'Ecuyer
Download or read book The Wonder Approach written by Catherine L'Ecuyer and published by Hachette UK. This book was released on 2019-09-26 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'This book is a must-read for parents and educators who want to refocus children's attention to one of the greatest secrets to long-term happiness - discovering the extraordinary in the ordinary' - Jessica Joelle Alexander, co-author of The Danish Way of Parenting Children of the last twenty years have grown up in an increasingly frenzied and demanding environment so that, on one hand, education has been rendered more complicated, and on the other, the essentials have been lost to view. In order to ensure their future success, parents often feel that they must fill their children's schedules with endless activities that cause leisure, spontaneous activity, and the experience of nature, beauty and silence, to fade out of their lives. This veritable race toward adulthood distances children more and more from the natural laws of childhood. A constant stream of loud and flashy stimuli disturbs the only true and sustainable learning that exists in them: that of calmly and quietly discovering the world for themselves and at their own pace, with a sense of wonder that goes beyond mere curiosity for the unknown or interest in novelty. In a world such as this, it can be a daunting task for a parent or educator of young children to discern how to best raise their children. Catherine L'Ecuyer offers clarity, drawing attention to the findings of many studies of the last few decades on the effects of screen use, overstimulation and mechanistic approaches to education on young children, and suggests time exploring the real world, more silence and the 'Wonder Approach' as remedies. Learning should be a wondrous journey guided by a deep reflection on what the natural laws of childhood require: respect for children's pace and rhythms, innocence, sense of mystery and thirst for beauty.
Book Synopsis Tools for Thought by : Howard Rheingold
Download or read book Tools for Thought written by Howard Rheingold and published by MIT Press. This book was released on 2000-04-13 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a highly engaging style, Rheingold tells the story of what he calls the patriarchs, pioneers, and infonauts of the computer, focusing in particular on such pioneers as J. C. R. Licklider, Doug Engelbart, Bob Taylor, and Alan Kay. The digital revolution did not begin with the teenage millionaires of Silicon Valley, claims Howard Rheingold, but with such early intellectual giants as Charles Babbage, George Boole, and John von Neumann. In a highly engaging style, Rheingold tells the story of what he calls the patriarchs, pioneers, and infonauts of the computer, focusing in particular on such pioneers as J. C. R. Licklider, Doug Engelbart, Bob Taylor, and Alan Kay. Taking the reader step by step from nineteenth-century mathematics to contemporary computing, he introduces a fascinating collection of eccentrics, mavericks, geniuses, and visionaries. The book was originally published in 1985, and Rheingold's attempt to envision computing in the 1990s turns out to have been remarkably prescient. This edition contains an afterword, in which Rheingold interviews some of the pioneers discussed in the book. As an exercise in what he calls "retrospective futurism," Rheingold also looks back at how he looked forward.
Book Synopsis Universities for Sale by : Neil Tudiver
Download or read book Universities for Sale written by Neil Tudiver and published by James Lorimer & Company. This book was released on 1999 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the 1990s Canadian universities experienced an aggressive campaign of corporatization. Universities for Sale offers suggestions on how to resist corporatization. Neil Tudiver shows how scholarly independence has, in recent years, been eroded to a point of crisis. Left unchecked, corporations play a larger and larger role in deciding which fields of study survive and which will disappear. He looks at how professors defend free inquiry against the pressures of economic expediency. Universities for Sale is a penetrating analysis of the ongoing issue of corporate influence on Canada's universities.
