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Influence De La Topographie Du Terrain Sur La Propagation Des Ondes Electromagnetiques En Basses Frequences
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Book Synopsis Influence de la topographie du terrain sur la propagation des ondes electromagnetiques en basses frequences by : Mohamed Abou Aram
Download or read book Influence de la topographie du terrain sur la propagation des ondes electromagnetiques en basses frequences written by Mohamed Abou Aram and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence de la topographie du terrain sur la propagation des ondes électromagnétiques en basses fréquences by : Mohamed Abou Aram
Download or read book Influence de la topographie du terrain sur la propagation des ondes électromagnétiques en basses fréquences written by Mohamed Abou Aram and published by . This book was released on 1990 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'irrégularité de la surface du sol crée un changement local du module et de la phase du champ électromagnétique. Ce changement dépend de plusieurs paramètres : la conductivité du terrain, la fréquence d'émission et les dimensions de l'irrégularité (montagne, vallée, forêt, bâtiment...). Nous avons mis au point plusieurs programmes de calcul numérique afin de déterminer l'influence de ces anomalies topographiques sur le champ électrique dans le domaine des basses fréquences. Dans cette étude, nous avons également déterminé l'influence d'un pylône, en partie enterré dans le sol, sur le champ électrique et sa réponse temporelle à une décharge électrique provoquée, par exemple, par la foudre. Enfin, l'effet d'un changement brutal de conductivité entre deux milieux sur le champ électrique a été mis en évidence, et nous nous sommes attachés plus particulièrement à étudier la transition sol-mer et les fluctuations du champ au voisinage immédiat de la ligne de côte.
Book Synopsis Influence de la topographie locale du sol et de ses caractéristiques électriques sur la propagation des ondes électromagnétiques basses fréquences by : Omar Benlamlih
Download or read book Influence de la topographie locale du sol et de ses caractéristiques électriques sur la propagation des ondes électromagnétiques basses fréquences written by Omar Benlamlih and published by . This book was released on 1991 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'étude de la propagation des ondes basses fréquences (de l'ordre ou inférieure à 100 kHz) au voisinage de la surface du sol et notamment l'influence de la topographie du terrain sur l'amplitude et la phase de l'onde de sol a fait l'objet de nombreuses études. La plupart d'entre elles sont basées sur le concept de l'impédance de surface, valable pour des anomalies ayant des rayons de courbure grands par rapport à la longueur d'onde. Elles permettent de prédire le comportement moyen du champ sur des distances importantes, mais ne peuvent rendre compte d'effets locaux au voisinage immédiat d'une anomalie dont les dimensions sont petites vis-à-vis de la longueur d'onde. Cette thèse a donc pour objet l'étude de la déformation du champ électromagnétique au voisinage de certaines hétérogénéités telles qu'une forêt, une colline ou une vallée. Nous nous limiterons à une approche bidimensionnelle du problème. Deux méthodes de calcul sont proposées, l'une basée sur des équations intégrales en considérant l'anomalie comme un émetteur rerayonnant; l'autre est une résolution directe des équations de Maxwell par la méthode des différences finies. Des applications numériques ont été faites de manière à mettre en évidence l'influence de la taille et de la forme de l'anomalie topographique sur l'amplitude du champ électromagnétique
Book Synopsis Influence de la topographie locale du sol et de ses caracteristiques electriques sur la propagation des ondes electromagnetiques basses frequences by : Omar Benlamlih
Download or read book Influence de la topographie locale du sol et de ses caracteristiques electriques sur la propagation des ondes electromagnetiques basses frequences written by Omar Benlamlih and published by . This book was released on 1991 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dictionary of Building and Civil Engineering by : Don Montague
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Download or read book El Niño written by Bruno Voituriez and published by UNESCO. This book was released on 2000 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: El Nino, caprice of the heavens, scapegoat for every calamity? The general public cannot really understand what is behind the El Nino phenomenon. The book offers a tour of the Earth's climate to understand one of its normal but extreme components.
Book Synopsis Submarine Mass Movements and Their Consequences by : Vasilios Lykousis
Download or read book Submarine Mass Movements and Their Consequences written by Vasilios Lykousis and published by Springer Science & Business Media. This book was released on 2007-09-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions from leading researchers in science and engineering, this book provides a global perspective on submarine mass movements and their consequences. Authors report on new findings from fundamental as well as site-specific studies from around the world. All studies relied on the most recent technologies, including multi-beam sonar imaging techniques, 3D seismic analysis, slope stability analysis, debris flow, and tsunami modeling.
Book Synopsis Acoustics, Aeroacoustics and Vibrations by : Fabien Anselmet
Download or read book Acoustics, Aeroacoustics and Vibrations written by Fabien Anselmet and published by John Wiley & Sons. This book was released on 2016-01-07 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: This didactic book presents the main elements of acoustics, aeroacoustics and vibrations. Illustrated with numerous concrete examples linked to solid and fluid continua, Acoustics, Aeroacoustics and Vibrations proposes a selection of applications encountered in the three fields, whether in room acoustics, transport, energy production systems or environmental problems. Theoretical approaches enable us to analyze the different processes in play. Typical results, mostly from numerical simulations, are used to illustrate the main phenomena (fluid acoustics, radiation, diffraction, vibroacoustics, etc.).
Book Synopsis Progress in Landslide Science by : Kyoji Sassa
Download or read book Progress in Landslide Science written by Kyoji Sassa and published by Springer Science & Business Media. This book was released on 2007-12-29 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents current progress in landslide science and consists of four parts: progress in landslide science, landslide dynamics, landslide monitoring, and landslide risk assessment. It provides useful information to those working on landslide risk-mitigation planning. It can be also used as an introductory textbook for college students who wish to learn fundamental scientific achievements in the field of landslide disaster reduction.
Book Synopsis Landslide Risk Assessment by : David Cruden
Download or read book Landslide Risk Assessment written by David Cruden and published by Routledge. This book was released on 2018-05-02 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 25 papers collected together in this volume present comprehensive coverage of all major aspects of landslide risk assessment, including the risk assessment framework, and methods for estimating probability of landsliding vulnerability and risk.
Book Synopsis Hydrology of Mediterranean and Semiarid Regions by : Eric Servat
Download or read book Hydrology of Mediterranean and Semiarid Regions written by Eric Servat and published by . This book was released on 2003 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Building Wireless Community Networks by : Rob Flickenger
Download or read book Building Wireless Community Networks written by Rob Flickenger and published by "O'Reilly Media, Inc.". This book was released on 2003 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Building Wireless Community Networks is about getting people online using wireless network technology. The 802.11b standard (also known as WiFi) makes it possible to network towns, schools, neighborhoods, small business, and almost any kind of organization. All that's required is a willingness to cooperate and share resources. The first edition of this book helped thousands of people engage in community networking activities. At the time, it was impossible to predict how quickly and thoroughly WiFi would penetrate the marketplace. Today, with WiFi-enabled computers almost as common as Ethernet, it makes even more sense to take the next step and network your community using nothing but freely available radio spectrum. This book has showed many people how to make their network available, even from the park bench, how to extend high-speed Internet access into the many areas not served by DSL and cable providers, and how to build working communities and a shared though intangible network. All that's required to create an access point for high-speed Internet connection is a gateway or base station. Once that is set up, any computer with a wireless card can log onto the network and share its resources. Rob Flickenger built such a network in northern California, and continues to participate in network-building efforts. His nuts-and-bolts guide covers: Selecting the appropriate equipment Finding antenna sites, and building and installing antennas Protecting your network from inappropriate access New network monitoring tools and techniques (new) Regulations affecting wireless deployment (new) IP network administration, including DNS and IP Tunneling (new) His expertise, as well as his sense of humor and enthusiasm for the topic, makes Building Wireless Community Networks a very useful and readable book for anyone interested in wireless connectivity.
Book Synopsis Resilience and Urban Risk Management by : Damien Serre
Download or read book Resilience and Urban Risk Management written by Damien Serre and published by CRC Press. This book was released on 2012-10-08 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Resilience and Urban Risk Management presents the latest progress made in designing resilient towns, and identifies leads to be explored for attaining the objective of systematically integrating risks into urban environments The aim of the book is to provide guidance in designing and planning future cities, and to create a new form of risk manageme
Download or read book Wireless Hacks written by Rob Flickenger and published by "O'Reilly Media, Inc.". This book was released on 2003 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuing with the successful Hack Series, this title provides real-world working examples of how to make useful things happen with wireless equipment.
Book Synopsis Quaternary Vegetation Dynamics by : Jürgen Runge
Download or read book Quaternary Vegetation Dynamics written by Jürgen Runge and published by CRC Press. This book was released on 2021-11-28 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book celebrates the relaunch of the African Pollen Database, presents state-of-the-art of modern and ancient pollen data from sub-Saharan Africa, and promotes Open Access science. Pollen grains are powerful tools for the study of past vegetation dynamics because they preserve well within sedimentary deposits and have a huge diversity in ornamentation that allows different taxa to be determined. The reconstruction of past vegetation from the examination of ancient pollen records thus can be used to characterize the nature of past landscapes (e.g. abundance of forests vs. grasslands), provide insights into changes in biodiversity, and gain empirical evidence of vegetation response to climatic change and human activity. In this, the 35th Volume of "Palaeoecology of Africa", we bring together new data and extensive synthetic reviews to provide novel insights into the relationships between human evolution, human activity, climate change and vegetation dynamics during the Quaternary, the last 2.6 million years. Current and ongoing climate and land-use change is exerting pressure on modern vegetation formations and threatening the livelihoods and wellbeing of many peoples in Africa. In this book the focus is on the Quaternary because it is during this geological period that the modern vegetation formations developed into their current configurations against a backdrop of high magnitude global climate change (glacial-interglacial cycles), human evolution, and a growing human land-use footprint. In this book the latest information is presented and collated from around the African continent to parameterize past vegetation states, identify the drivers of vegetation change, and assess the vegetation resilience to change. To achieve this research from two broad themes are covered: (i) the present is the key to the past (i.e. studies which improve our understanding of modern environments so that we can better interpret evidence from the past), and (ii) the past is the key to the future (i.e. studies which unlock information on how and why vegetation changed in the past so one can better anticipate trajectories of future change). This Open Access book will provide a strong foundation for future research exploring past ecological, environmental and climatic change within Africa and the surrounding islands. The book is organized regionally (covering western, eastern, central, and southern Africa) and it contains specialized articles focused on particular topics (such as modern pollen-vegetation relationships and fire as a driver of vegetation change), as well as regional and pan-African syntheses drawing together decades of research to assess key scientific questions (including the role of climate in driving vegetation change and the role of vegetation change in human evolution). These articles will be useful to students and teachers from high school to the highest level of university who are interested in the origins and dynamics of vegetation in Africa. Furthermore, it is also meant to provide societally relevant information that can act as an inspiration for the development of sustainable management practices for the future.
Book Synopsis Death, Dying, and the Biological Revolution by : Robert M. Veatch
Download or read book Death, Dying, and the Biological Revolution written by Robert M. Veatch and published by . This book was released on 1977 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Philosophical Essays by : Hans Jonas
Download or read book Philosophical Essays written by Hans Jonas and published by . This book was released on 2010-12 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: A pivotal volume in the collected works of Hans Jonas (1903-1993), one of most important German-American philosophers of the last half of the 20th century, this edition is the only one to include contributions from his three primary areas of achievement: philosophical reflection on gnosticism, on biology, and on technology.
