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Conception De Dispositifs Actifs De Maintien De Stabilite Pour Les Vehicules Evoluant En Milieux Naturels
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Book Synopsis Conception de dispositifs actifs de maintien de stabilité pour les véhicules évoluant en milieux naturels by : Mathieu Richier
Download or read book Conception de dispositifs actifs de maintien de stabilité pour les véhicules évoluant en milieux naturels written by Mathieu Richier and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: La problématique de cette thèse réside dans la caractérisation et le maintien de la stabilité des Véhicules Légers Tout Terrain (VLTT). Elle se concentre plus particulièrement sur le développement de systèmes de sécurité actifs capables à la fois de prévenir le conducteur des risques encourus mais aussi de les limiter afin d'assurer l'évolution du véhicule dans une zone de stabilité prédéfinie. Comme le cadre expérimental privilégié est l'application à la stabilité des quadricycles légers à moteurs, plus connus sous le terme anglophone "quad", une des contraintes du projet a été de se limiter à un système sensoriel bas-coût afin d'être en mesure d'industrialiser un tel système. En premier lieu, les métriques de stabilité (Transfert de Charge Latéral et Longitudinal : TCLa et TCLo) ont été choisies grâce à une étude préliminaire sur la stabilité des VLTT. Par la suite, une modélisation 2D en roulis et en tangage avec la prise en compte des déplacements du pilote sur le véhicule sont présentées, ce qui permet d'estimer respectivement le TCLa et le TCLo uniquement à partir de la mesure de l'accélération latérale et longitudinale. Étant donné que pour la suite des travaux, l'anticipation du risque de renversement latéral est nécessaire, un modèle 2D en lacet du véhicule est proposé afin d'obtenir un modèle analytique décrivant la dynamique latérale du véhicule. La suite du mémoire présente les différentes techniques d'observation proposées pour l'estimation des variables et paramètres non-directement mesurables du modèle en lacet du véhicule et qui influencent sa stabilité latérale : les glissements, les conditions d'adhérence et les inclinaisons du véhicule. Plusieurs observateurs ont été proposés, dont le dernier permet de considérer des conditions d'adhérence différentes entre les essieux avant et arrière en utilisant plus largement les accélérations mesurées. Cela permet d'intégrer les passages de sous- à sur-vireur qu'il est essentiel de considérer quand on étudie la stabilité de ce type de véhicule. Ainsi, l'estimation des glissements est toujours pertinente, ce qui permet d'obtenir par la suite une meilleure prédiction de la métrique de stabilité latérale (TCLa) quel que soit le comportement du véhicule. Puis en s'appuyant sur les estimations des observateurs couplées aux modèles dynamiques du véhicule et sur l'extrapolation des commandes du conducteur sur un horizon de prédiction, il est possible de prédire les évolutions du TCLa. Cette valeur prédite ainsi que les estimations en ligne des métriques de stabilité constituent alors le point d'entrée pour la synthétisation d'un système de sécurité actif dédié aux VLTT. Celui-ci est basé sur la génération d'un retour d'effort au niveau de la gâchette des gaz permettant soit d'informer le pilote du risque encouru par la création d'une sensation de dureté, soit d'imposer le retour complet de la gâchette des gaz, ce qui implique une diminution de la vitesse et donc la réduction du risque. Finalement, dans le cas où il est possible de maîtriser la vitesse du véhicule par l'installation d'un système de rétroaction sur les freins (Quad haut de gamme ou robot mobile), les derniers travaux présentés s'intéressent aux techniques de commande prédictive à modèle afin de calculer en temps-réel la vitesse maximale admissible, qui assure l'évolution du critère de stabilité choisi dans un domaine de stabilité. Les modèles, les observateurs, la prédiction du TCLa et les 2 systèmes de prévention présentés dans ce mémoire ont été validés et testés au travers de simulations avancées et d'essais expérimentaux réalisés sur un quad agricole et un robot autonome. Il apparaît alors qu'en plus d'être efficace pour la prévention des risques de renversement à hautes dynamiques, le système de sécurité est industriellement viable. Cela a été rendu possible grâce à une conception reposant uniquement sur des actionneurs et un système sensoriel, dont les coûts sont en adéquation avec le prix d'un VLTT.
Book Synopsis The Effective Public Manager by : Steven Cohen
Download or read book The Effective Public Manager written by Steven Cohen and published by John Wiley & Sons. This book was released on 2008-08-28 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since it was first published more than twenty years ago, The Effective Public Manager has become the classic resource for public administrators and students. The fourth edition of groundbreaking work synthesizes the current thinking in the field and presents practical lessons and tools in a highly accessible format. Focused on helping real-world managers and managers-to-be meet the demands of their jobs head-on rather than working around the constraints of government, this book offers a fresh approach to implementing effective management tools in a dynamic political, organizational, economic, and technological context.
Book Synopsis Technology and Terrorism by : Paul Wilkinson
Download or read book Technology and Terrorism written by Paul Wilkinson and published by Psychology Press. This book was released on 1993 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Does modern technology tilt the balance in favour of the terrorists in their constant battle to defeat the efforts of counter-terrorist agencies, or vice versa? How can we assess the feasibility and probability of terrorists in certain circumstances resorting to nuclear, chemical or biological weapons? Bearing in mind that terrorists have already resorted to mass murder in the form of sabotage bombing of airliners, tragically demonstrated in the 1988 bombing of Pan Am 103 over Lockerbie, how effective have the aviation authorities been in using technology and other measures to combat this threat?
Book Synopsis Forest Landscape Management by : United States. Forest Service. Northern Region
Download or read book Forest Landscape Management written by United States. Forest Service. Northern Region and published by . This book was released on 1972 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Getting Agencies to Work Together by : Eugene Bardach
Download or read book Getting Agencies to Work Together written by Eugene Bardach and published by Rowman & Littlefield. This book was released on 1998-10-01 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collaboration between government agencies, an old joke goes, is an unnatural act committed by nonconsenting adults. Eugene Bardach argues that today's opinion climate favoring more results-oriented government makes collaboration a lot more natural--though it is still far from easy. In this book, Bardach diagnoses the difficulties, explains how they are sometimes overcome, and offers practical ideas for public managers, advocates, and others interested in developing interagency collaborative networks. Bardach provides examples from diverse policy areas, including children, youth, and family services; welfare-to-work; antipollution enforcement; fire prevention; and ecosystem management.
Book Synopsis Revisiting Moroccan Migrations by : Mohammed Berriane
Download or read book Revisiting Moroccan Migrations written by Mohammed Berriane and published by Routledge. This book was released on 2018-02-02 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the 20th century, Morocco has become one of the world’s major emigration countries. But since 2000, growing immigration and settlement of migrants from sub-Saharan Africa, the Middle East, and Europe confronts Morocco with an entirely new set of social, cultural, political and legal issues. This book explores how continued emigration and increasing immigration is transforming contemporary Moroccan society, with a particular emphasis on the way the Moroccan state is dealing with shifting migratory realities. The authors of this collective volume embark on a dialogue between theory and empirical research, showcasing how contemporary migration theories help understanding recent trends in Moroccan migration, and, vice-versa, how the specific Moroccan case enriches migration theory. This perspective helps to overcome the still predominant Western-centric research view that artificially divide the world into ‘receiving’ and ‘sending’ countries and largely disregards the dynamics of and experiences with migration in countries in the Global South. This book was previously published as a special issue of The Journal of North African Studies.
Book Synopsis Organizing & Organizations by : Stephen Fineman
Download or read book Organizing & Organizations written by Stephen Fineman and published by SAGE. This book was released on 2009-11-17 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organizing and Organizations is well loved by students and lecturers for its accessible, conversational tone and insightful real-life examples introducing the study of organizations and organizational behaviour. Fineman, Gabriel and Sims, eminent academics in the field, cover a wealth of key concepts, research and literature leaving students informed and engaged. The Fourth Edition builds on the strengths of previous editions, to provide you with a textbook that continues to stand out from the rest. This new edition has been fully developed to include: - New chapters on Influence and Power, and Innovation and Change. - A new section within each chapter that highlights the theoretical links informing the chapters. - New review questions to test and apply your understanding of the ideas in each chapter. - New ′reading on′ sections that direct you to free links to highly recommended journal articles relating to each chapter′s coverage, and found on the companion website. - New critical review questions at the end of each chapter to encourage debate. - Each chapter is now enlivened with pictorial illustrations. - A fully updated glossary of key concepts in the study of organizations Organizing and Organizations integrates a strong critical approach throughout.
Book Synopsis How to Make Collaboration Work by : David A Straus
Download or read book How to Make Collaboration Work written by David A Straus and published by Berrett-Koehler Publishers. This book was released on 2002-10-02 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every day we work with others to solve problems and make decisions, but the experience is often stressful, frustrating, and inefficient. In How to Make Collaboration Work, David Straus, a pioneer in the field of group problem solving, introduces five principles of collaboration that have been proven successful time and again in nearly every conceivable setting. Straus draws on his thirty years of personal and professional experience to show how these principles have been applied by organizations as diverse as Ford Motor Company, the U.S. Environmental Protection Agency, Harvard Business School Publishing, Boston Public Schools, Kaiser Permanente, the city of Denver, and many others. How to Make Collaboration Work shows how collaboration can become a joy rather than a chore-a kind of chemical reaction that releases far more energy than it consumes.
Book Synopsis Managing within Networks by : Robert Agranoff
Download or read book Managing within Networks written by Robert Agranoff and published by Georgetown University Press. This book was released on 2007-05-07 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: The real work of many governments is done not in stately domed capitols but by a network of federal and state officials working with local governments and nongovernmental organizations to address issues that cross governmental boundaries. Managing within Networks analyzes the structure, operations, and achievements of these public management networks that are trying to solve intractable problems at the field level. It examines such areas as transportation, economic and rural development, communications systems and data management, water conservation, wastewater management, watershed conservation, and services for persons with developmental disabilities. Robert Agranoff draws a number of innovative conclusions about what these networks do and how they do it from data compiled on fourteen public management networks in Indiana, Iowa, Kentucky, Nebraska, and Ohio. Agranoff identifies four different types of networks based on their purposes and observes the differences between network management and traditional management structures and leadership. He notes how knowledge is managed and value added within intergovernmental networks. This volume is useful for students, scholars, and practitioners of public management.
Book Synopsis On Borrowed Time by : John E. Tilton
Download or read book On Borrowed Time written by John E. Tilton and published by Routledge. This book was released on 2010-09-30 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sharp rise in mineral use has revived concern about scarcity. Economist John Tilton responds by analyzing recent trends in the consumption and availability of minerals that are most integral to the needs of modern civilization. He reminds readers that, if the arguments about scarcity sound familiar, it is because the story of minerals scarcity is almost as old as human history-and so too is substitution and technological innovation. The issue at hand is the unprecedented acceleration in exploitation and use. Given global population growth, rising living standards, and environmental concerns, how seriously should today‘s society take the threat of mineral exhaustion? On Borrowed Time? provides general interest and student readers with an accessible framework for understanding scarcity. Tilton defines important concepts and explores the methods used to study mineral scarcity, including physical measures of known reserves and the total resource base, and economic measures, such as extraction and end-user costs. He notes the increasing emphasis on the social and environmental costs of mineral production and use, placing the scarcity debate in context of broader concerns about sustainability and equity. He adds a history of thought about scarcity, from Malthus and Ricardo to Harold Hotelling, Donella Meadows, to the present day.
Book Synopsis Protected Area Management by : Barbara Sladonja
Download or read book Protected Area Management written by Barbara Sladonja and published by BoD – Books on Demand. This book was released on 2012-08-08 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Protected areas are at the base of the most national and international conservation strategies. Due to the many unpredictable elements in ecology matters, each protected area requires a case-specific set of guidelines but a common issue is how to cope with human interaction. The management of protected areas is replete with challenges and the only way to gain understanding and achieve greater management possibilities is to exchange experiences and knowledge. Environmental managers are aware of that and together with scientists are looking for more modern and better solutions, both with respect to natural resources and human interactions in many issues regarding nature protection. This publication presents reviews and research results on protected areas management, as well as 12 case studies derived from around the world with the aim of improving management effectiveness of the protected areas.
Book Synopsis Bank Profitability - Statistical Supplement by : Organisation for Economic Co-operation and Development
Download or read book Bank Profitability - Statistical Supplement written by Organisation for Economic Co-operation and Development and published by . This book was released on 1987 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Making Sense of the Organization, Volume 2 by : Karl E. Weick
Download or read book Making Sense of the Organization, Volume 2 written by Karl E. Weick and published by John Wiley & Sons. This book was released on 2012-01-12 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Making Sense of the Organization elaborates on the influential idea that organizations are interpretation systems that scan, interpret, and learn. These selected essays represent a new approach to the way managers learn and act in response to their environment and the way organizational change evolves. Readers of this volume will find a wealth of examples and insights which go well beyond thinking and cognition to explain action. The author's ideas are at the forefront of our thinking on leadership, teams, and the management of change. “This book engages the puzzle of impermanence in organizing. Through rich examples, evocative language, artful literature citing, and imaginative connecting, Weick re-introduces core ideas and themes around attending, interpreting, acting and learning to unlock new insights about impermanent organizing. The wisdom in this book is timeless and timely. It prods scholars and managers of organizations to complicate their views of organizing in ways that enrich thought and action.” - Jane E. Dutton, Robert L. Kahn Distinguished University Professor, University of Michigan
Download or read book African Cinema written by Manthia Diawara and published by Indiana University Press. This book was released on 1992-04-22 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manthia Diawara provides an insider's account of the history and current status of African cinema. African Cinema: Politics and Culture is the first extended study in English of Sub-Saharan cinema. Employing an interdisciplinary approach which draws on history, political science, economics, and cultural studies, Diawara discusses such issues as film production and distribution, and film aesthetics from the colonial period to the present. The book traces the growth of African cinema through the efforts of pioneer filmmakers such as Paulin Soumanou Vieyra, Oumarou Ganda, Jean-René Débrix, Jean Rouch, and Ousmane Sembène, the Pan-African Filmmakers' Organization (FEPACI), and the Ougadougou Pan-African Film Festival (FESPACO). Diwara focuses on the production and distribution histories of key films such as Ousmane Sembène's Black Girl and Mandabi (1968) and Souleymane Cissé's Fine (1982). He also examines the role of missionary films in Africa, Débrix's ideas concerning 'magic, ' the links between Yoruba theater and Nigerian cinema, and the parallels between Hindu mythologicals in India and the Yoruba-theater - inflected films in Nigeria. Diawara also looks at film and nationalism, film and popular culture, and the importance of FESPACO. African Cinema: Politics and Culture makes a major contribution to the expanding discussion of Eurocentrism, the canon, and multi-culturalism.
Book Synopsis American Religion by : Mark A. A. Chaves
Download or read book American Religion written by Mark A. A. Chaves and published by Princeton University Press. This book was released on 2017-08-29 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most authoritative resource on religious trends in America—now fully updated Most Americans say they believe in God, and more than a third say they attend religious services every week. Yet studies show that people do not really go to church as often as they claim, and it is not always clear what they mean when they tell pollsters they believe in God or pray. American Religion presents the best and most up-to-date information about religious trends in the United States, in a succinct and accessible manner. This sourcebook provides essential information about key developments in American religion since 1972, and is the first major resource of its kind to appear in more than two decades. Mark Chaves looks at trends in diversity, belief, involvement, congregational life, leadership, liberal Protestant decline, and polarization. He draws on two important surveys: the General Social Survey, an ongoing survey of Americans' changing attitudes and behaviors, begun in 1972; and the National Congregations Study, a survey of American religious congregations across the religious spectrum. Chaves finds that American religious life has seen much continuity in recent decades, but also much change. He challenges the popular notion that religion is witnessing a resurgence in the United States—in fact, traditional belief and practice is either stable or declining. Chaves examines why the decline in liberal Protestant denominations has been accompanied by the spread of liberal Protestant attitudes about religious and social tolerance, how confidence in religious institutions has declined more than confidence in secular institutions, and a host of other crucial trends. Now with updated data and a new preface by the author, this revised edition provides essential information about key developments in American religion since 1972, plainly showing that religiosity is declining in America.
Download or read book Stuck written by Marc Sommers and published by University of Georgia Press. This book was released on 2012 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Young people are transforming the global landscape. As the human population today is younger and more urban than ever before, prospects for achieving adulthood dwindle while urban migration soars. Devastated by genocide, hailed as a spectacular success, and critiqued for its human rights record, the Central African nation of Rwanda provides a compelling setting for grasping new challenges to the world's youth. Spotlighting failed masculinity, urban desperation, and forceful governance, Marc Sommers tells the dramatic story of young Rwandans who are “stuck,” striving against near-impossible odds to become adults. In Rwandan culture, female youth must wait, often in vain, for male youth to build a house before they can marry. Only then can male and female youth gain acceptance as adults. However, Rwanda's severe housing crisis means that most male youth are on a treadmill toward failure, unable to build their house yet having no choice but to try. What follows is too often tragic. Rural youth face a future as failed adults, while many who migrate to the capital fail to secure a stable life and turn fatalistic about contracting HIV/AIDS. Featuring insightful interviews with youth, adults, and government officials, Stuck tells the story of an ambitious, controlling government trying to govern an exceptionally young and poor population in a densely populated and rapidly urbanizing country. This pioneering book sheds new light on the struggle to come of age and suggests new pathways toward the attainment of security, development, and coexistence in Africa and beyond. Published in association with the United States Institute of Peace
Book Synopsis Biodiversity and Sustainable Development by : Rabindra Nath Pati
Download or read book Biodiversity and Sustainable Development written by Rabindra Nath Pati and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented at the First Global Summit on Sustainable Development and Biodiversity, held at Raipur during 7-9 February 2009.
