Author: Dominique Le Denmat Publisher: ISBN: Category : Languages : fr Pages : 454
Book Description
Actuellement, de nombreux actes odontologiques impliquent des operations executees sans le contrôle visuel : par exemple en chirurgie et lors du traitement des canaux radiculaires des dents. Pendant l'execution de l'acte, le praticien est alors seulement guide par son sens tactile. Seuls les examens radiographiques traditionnels pre- et post-operatoires sont possibles . ils impliquent, en outre, une attente minimale d'une dizaine de minutes , delai apres lequel l'interpretation du cliche est possible. Le but poursuivi par le present travail est de fournir au praticien les moyens d'un contrôle visuel instantane du geste qu'il execute. Le dispositif realise et etudie dans le cadre de ce memoire est une chaîne de radioscopie dentaire a faibles doses de rayons X, utilisable essentiellement pour l'acquisition d'images cinetiques. Apres une revue detaillee des techniques actuelles d'imagerie radiolo-gique en art dentaire et de la situation de la radioscopie par rapport à ces techniques, nous envisageons les disciplines odontologiques pour lesquelles ce nouveau precede presente un interêt. Par la suite, la discussion des elements bibliographiques et la description des composants opto-electroniques d'une chalne de radioscopie amplifiee permettent l'argumentation de nos propres choix : source de rayonnements X de faible debit d'exposition rigoureusement collimatee, conduit d'image =t fibres optiques et convertisseur X/visible associe, amplificateur de luminance couple A un dispositif à transfert de charges et enfin, module de traitement numerique et de visualisation de l'image. L'analyse numerique de l'image conduit à la construction d'une serie de fonctions de transfert de modulation. La contribution a la qualité finale de l'image de chaque composant de la chalne est ainsi evaluee. Une etude dosimetrique preliminaire complete ce travail.
Author: John Henry Lorentz Publisher: Historical Dictionaries of Asia, Oceania, and the Middle East ISBN: Category : History Languages : en Pages : 570
Book Description
Provides an overview of specific events, movements, people, political and social groups, places, trends, and chronology. Allows for considerable exploration of a number of historical and contemporary topics and issues. The modern period, defined as 1800-present, is covered extensively.
Author: Leonard J Lickorish Publisher: Routledge ISBN: 1136391924 Category : Business & Economics Languages : en Pages : 257
Book Description
An Introduction to Tourism is the essential guide to the tourism industry. It provides a comprehensive and authoritative introduction to all facets of tourism including: the history of tourism; factors influencing the tourism industry; tourism in developing countries; sustainable tourism; forecasting future trends. Tourism has changed radically in recent years with the onset of many technological and economic changes and an ever increasing concern for the environment. This book provides a down-to-earth introduction to this complex and multi-faceted industry. This invaluable introduction is written for all students of tourism and all those involved in the industry who want to know more about the structure, component activities and environment within which they work.
Author: David I. Kertzer Publisher: Univ of California Press ISBN: 9780520084667 Category : Social Science Languages : en Pages : 428
Book Description
Thanks to improved food, medicine, and living conditions, the average age of the population is increasing throughout the modern industrialized world. Yet, despite the recent upsurge of scholarly interest in the lives of older people and the blossoming of historical demography, little historical demographic attention has been paid to the lives of the elderly. A landmark volume, Aging in the Past marks the emergence of the historical demographic study of aging. Following a masterly explication of the new field by Peter Laslett, leading scholars in family history and historical demography offer new research results and fresh analyses that greatly increase our understanding of aging, historically and across cultures. Focusing primarily on post-Industrial Europe and the United States, they explore a range of issues under the broad topics of living arrangements, widowhood, and retirement and mortality. This important work provides a much-needed historical perspective on and suggests possible alternative solutions to the problems of the aged. Thanks to improved food, medicine, and living conditions, the average age of the population is increasing throughout the modern industrialized world. Yet, despite the recent upsurge of scholarly interest in the lives of older people and the blossoming of historical demography, little historical demographic attention has been paid to the lives of the elderly. A landmark volume, Aging in the Past marks the emergence of the historical demographic study of aging. Following a masterly explication of the new field by Peter Laslett, leading scholars in family history and historical demography offer new research results and fresh analyses that greatly increase our understanding of aging, historically and across cultures. Focusing primarily on post-Industrial Europe and the United States, they explore a range of issues under the broad topics of living arrangements, widowhood, and retirement and mortality. This important work provides a much-needed historical perspective on and suggests possible alternative solutions to the problems of the aged.
Author: Dominique Le Denmat
Author: Patrick Bertreux (Chirugien dentiste)
Author: Jean-Paul-Michel Guglielmi
Author: BRUNO.. ANDRIES
Author: Gérard Barondeau
Author: ANNE.. OTT
Author: Clothilde Baconnier
Author: John Henry Lorentz
Author: Leonard J Lickorish
Author: David I. Kertzer