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Etudes Des Solutions Dacces Optique Exploitant Une Extension De Portee
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Book Synopsis Etudes des solutions d'accès optique exploitant une extension de portée by : Fabienne Saliou
Download or read book Etudes des solutions d'accès optique exploitant une extension de portée written by Fabienne Saliou and published by . This book was released on 2010 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans le but d'optimiser le déploiement du réseau fibré, cette thèse a pour objectif d'étudier les solutions d'extension de portée du réseau d'accès optique. Le premier chapitre décrit le contexte du réseau d'accès dans lequel s'inscrit cette thématique. Le fonctionnement des systèmes GPON (Gigabit Passive Optical Network) déployés aujourd'hui pour amener la fibre jusqu'à la maison (FTTH : Fibre To The Home) est détaillé ainsi que les nouvelles générations de PON (NGPON : Next Generation PON). Ces dernières promettent de nouvelles architectures à plus ou moins long terme (NGPON1 et NGPON 2), dont l'objectif commun est la montée en débit. Le principe d'extension de portée est également introduit par la description des travaux de normalisation pour lesquels l'insertion d'Extender Box est proposée pour le réseau d'accès optique. Le deuxième chapitre présente différentes solutions d'extension du budget optique de systèmes GPON. Les résultats d'évaluation technique d'Extender Box, à base d'amplification optique ou de régénération Optique-Electrique-Optique, sont présentés suivant plusieurs configurations. De plus, des études technico-économiques et énergétiques sur la réduction du nombre de centraux optiques montrent l'importance de la mutualisation des fibres inter-centraux. Dans ce contexte, des Extender Box intégrant des fonctions de multiplexage en longueur d'onde ou de duplication de port PON sont proposées. Enfin, le troisième chapitre traite de l'extension de portée de systèmes NGPON. L'amplification optique est mise en place sur des systèmes de future génération et dont la normalisation est en cours : 10GPON, WDM PON, et OFDM PON. Le comportement de SOA et d'EDFA est étudié sur des plateformes de laboratoire reproduisant ces systèmes.
Download or read book Terra 2008 written by Leslie Rainer and published by Getty Publications. This book was released on 2011-06-14 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.
Book Synopsis Water & Heritage by : Willem Willems
Download or read book Water & Heritage written by Willem Willems and published by . This book was released on 2017-01-15 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water is vital for life, and its availability has been a concern for mankind throughout the ages. Its presence has always been ascertained in a variety of ways and the development of human society everywhere is connected with various forms of water management. Man also needed to manage water to find protection from its dangers and the need for that is increasing. In the coming decades, the impact of climate change is expected to intensify floods and droughts, affect groundwater resources, raise sea levels, increase pollution and enhance the frequency and magnitude of disasters. Societies around the world are challenged to adapt to these threats to ensure water security, economic prosperity and environmental and cultural sustainability. This book deals with the heritage of water management and the use that was made of water, as well as the impact of water management on heritage. An example of the former may be an ancient irrigation system in the Filipines or in the Middle East that still functions today, while the latter may reflect the importance of maintaining groundwater levels for the preservation of organic remains on archaeological sites or of wooden piles underneath standing buildings. In either case the papers in this book reflect the dynamic nature of water, and hence the equally dynamic relation between water management and heritage. This publication follows up on a Heritage and Water conference in Amsterdam, the first of its kind. Its main purpose is to credibly present the importance and value of heritage and historical experience for water and sustainable development, and vice versa, present the importance of water management for the protection of heritage. It presents evolving insights and concepts about Water and about Heritage from a variety of disciplines, policy and public perspectives illustrated with cases studies and aims to connect decision makers with experts such as engineers, archaeologists, historians, geographers, ecologist and landscape architects
Book Synopsis Innovate Bristol by : Sven Boermeester
Download or read book Innovate Bristol written by Sven Boermeester and published by . This book was released on 2019-12 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Innovate Bristol highlights and celebrates those companies and individuals that are actively working at building a better tomorrow for all. Innovation Ecosystems thrive through the involvement and support of companies and individuals from all industries, which is why the Innovate series not only focuses on the innovators but also those people whom the Innovation Ecosystem, would not be able to thrive without.
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9251305536 Total Pages :435 pages Book Rating :4.2/5 (513 download)
Book Synopsis Regional Conference on building a future for sustainable small-scale fisheries in the Mediterranean and the Black Sea by : Food and Agriculture Organization of the United Nations
Download or read book Regional Conference on building a future for sustainable small-scale fisheries in the Mediterranean and the Black Sea written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2018-10-31 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: According to the report, the conference focused on the main challenges for the sustainable development of small-scale fisheries, including promoting political commitment and tailored strategies, raising awareness, and sharing knowledge.
Book Synopsis Rapport Et Documents Techniques de la Deuxième Consultation Européenne Sur L'Évaluation Économique de la Pêche Sportive Et Commerciale, 22-24 Septembre 1975, Göteborg, Suède by :
Download or read book Rapport Et Documents Techniques de la Deuxième Consultation Européenne Sur L'Évaluation Économique de la Pêche Sportive Et Commerciale, 22-24 Septembre 1975, Göteborg, Suède written by and published by Bernan Press(PA). This book was released on 1977 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Science and Empires by : P. Petitjean
Download or read book Science and Empires written by P. Petitjean and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Market Assessment Study of New Media Learning Materials by : Canada. Industry Canada
Download or read book Market Assessment Study of New Media Learning Materials written by Canada. Industry Canada and published by . This book was released on 1996 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ultra Wide Band Antennas by : Xavier Begaud
Download or read book Ultra Wide Band Antennas written by Xavier Begaud and published by John Wiley & Sons. This book was released on 2013-03-04 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra Wide Band Technology (UWB) has reached a level of maturity that allows us to offer wireless links with either high or low data rates. These wireless links are frequently associated with a location capability for which ultimate accuracy varies with the inverse of the frequency bandwidth. Using time or frequency domain waveforms, they are currently the subject of international standards facilitating their commercial implementation. Drawing up a complete state of the art, Ultra Wide Band Antennas is aimed at students, engineers and researchers and presents a summary of internationally recognized studies.
Book Synopsis Electrodynamics from Ampère to Einstein by : Olivier Darrigol
Download or read book Electrodynamics from Ampère to Einstein written by Olivier Darrigol and published by Oxford University Press. This book was released on 2003-06-26 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book recounts the developments of fundamental electrodynamics from Ampère's investigation of the forces between electric currents to Einstein's introduction of a new doctrine of space and time. The emphasis is on the diverse, evolving practices of electrodynamics and the interactions between the corresponding scientific traditions. A richly documented, clearly written, and abundantly illustrated history of the subject.
Book Synopsis A History of Optics from Greek Antiquity to the Nineteenth Century by : Olivier Darrigol
Download or read book A History of Optics from Greek Antiquity to the Nineteenth Century written by Olivier Darrigol and published by OUP Oxford. This book was released on 2012-01-26 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a long-term history of optics, from early Greek theories of vision to the nineteenth-century victory of the wave theory of light. It shows how light gradually became the central entity of a domain of physics that no longer referred to the functioning of the eye; it retraces the subsequent competition between medium-based and corpuscular concepts of light; and it details the nineteenth-century flourishing of mechanical ether theories. The author critically exploits and sometimes completes the more specialized histories that have flourished in the past few years. The resulting synthesis brings out the actors' long-term memory, their dependence on broad cultural shifts, and the evolution of disciplinary divisions and connections. Conceptual precision, textual concision, and abundant illustration make the book accessible to a broad variety of readers interested in the origins of modern optics.
Author :Jessica S. Sanders Publisher :Food & Agriculture Organization of the UN (FAO) ISBN 13 : Total Pages :128 pages Book Rating :4.:/5 (319 download)
Book Synopsis Marine Protected Areas by : Jessica S. Sanders
Download or read book Marine Protected Areas written by Jessica S. Sanders and published by Food & Agriculture Organization of the UN (FAO). This book was released on 2013 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: The five case studies from Belize, Mauritania, Samoa, Philippines and Japan were prepared as part of a set of 16 studies gathering national experiences from around the world. The studies are intended to ground the FAO Technical Guidelines on Marine Protected Areas (MPAs) and Fisheries1 in practical experience and to inform the use of MPAs globally
Author :Canada. Department of Fisheries and Oceans Publisher :Peches Et Oceans Direction Generale Des Communications = Fisheries and Oceans Communications Dir ISBN 13 : Total Pages :376 pages Book Rating :4.:/5 (31 download)
Book Synopsis Le Golfe Du Saint-Laurent--petit Océan Ou Grand Estuaire? by : Canada. Department of Fisheries and Oceans
Download or read book Le Golfe Du Saint-Laurent--petit Océan Ou Grand Estuaire? written by Canada. Department of Fisheries and Oceans and published by Peches Et Oceans Direction Generale Des Communications = Fisheries and Oceans Communications Dir. This book was released on 1991 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a workshop, the scientific reviews and the contributed papers presented at the symposium. The document presents a brief historical summary of marine research in the Gulf; reports the discussions, conclusions and recommendations of the different working groups on oceanography (physics, biology, chemistry and sedimentology) and on the fishery (fish and invertebrates); then presents the discussions of each multidisciplinary working group, centered around how the St. Lawrence system may be used as a natural laboratory which will contribute to the solution of major long-term problems of conservation of natural resources and of the quality of the environment.
Download or read book MIMO written by Alain Sibille and published by Academic Press. This book was released on 2010-12-03 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foreword from Arogyaswami Paulraj, Professor (Emeritus), Stanford University (USA) - The first book to show how MIMO principles can be implemented in today's mobile broadband networks and components - Explains and solves some of the practical difficulties that arise in designing and implementing MIMO systems - Both theory and implementation sections are written in the context of the most recent standards: IEEE 802.11n (WiFi); IEEE 802.16 (WIMAX); 4G networks (3GPP/3GPP2, LTE)
Book Synopsis 2nd Pan-African Symposium on the Sustainable Use of Natural Resources in Africa by : Bihini won wa Musiti
Download or read book 2nd Pan-African Symposium on the Sustainable Use of Natural Resources in Africa written by Bihini won wa Musiti and published by IUCN. This book was released on 2003 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: This bilingual publication results from a four-day symposium aimed at capturing the general directions and analytical issues that characterize approaches to sustainable use in Africa. The papers included in this work are organized under four major headings: modes of use, devolution, scale issues and external issues. Authors explore these themes through the use of case studies and the description of specific regional experiences. External issues are further explored in a series of commissioned policy papers which have also been included.
Download or read book Forestry Research Management written by and published by . This book was released on 1987 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development Publisher : ISBN 13 :9789283600046 Total Pages : pages Book Rating :4.6/5 ( download)
Book Synopsis AGARD Conference Proceedings by : North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development
Download or read book AGARD Conference Proceedings written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
