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Author : Bernard Démoulin
Publisher :
ISBN 13 : 9782746225923
Total Pages : 422 pages
Book Rating : 4.2/5 (259 download)
Download or read book Les chambres réverbérantes en électromagnétisme written by Bernard Démoulin and published by . This book was released on 2010 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : DEMOULIN. BERNARD
Publisher :
ISBN 13 : 9782746241077
Total Pages : pages
Book Rating : 4.2/5 (41 download)
Download or read book Les Chambres Reverberantes en Electromagnetisme (Collection Telecom) written by DEMOULIN. BERNARD and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Frédéric Hoëppe
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (493 download)
Download or read book Analyse du comportement électromagnétique des chambres réverbérantes à brassage de modes par l'utilisation de simulations numériques written by Frédéric Hoëppe and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Abdou Khadir Fall
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (93 download)
Download or read book Étude des chambres réverbérantes à brassage de modes en ondes millimétriques written by Abdou Khadir Fall and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: De nos jours, on assiste à l'émergence massive de nouveaux systèmes électroniques exploitant des fréquences de plus en plus élevées, particulièrement en ondes millimétriques (30-300 GHz). Il apparaît de ce fait un besoin potentiel de développement de nouveaux moyens d'essai appropriés dans le domaine millimétrique. En particulier, l'étude de la biocompatibilité de ces systèmes est clairement identifiée comme une priorité de recherche en électromagnétisme. Dans ce contexte, l'objectif de cette thèse consiste à concevoir et à évaluer les propriétés d'une chambre réverbérante à brassage de modes (CRBM) en bande Ka (26,5-40 GHz), en bande U (40-60 GHz) et en bande V (50-75 GHz). L'application visée dans cette thèse concerne la mise en place d'outils dosimétriques par caméra infrarouge en chambre réverbérante et la réalisation d'essais préliminaires sur des fantômes diélectriques à 60 GHz. Dans un premier temps, nous avons analysé numériquement le comportement statistique du champ électrique dans une cavité pré-dimensionnée. Les simulations sont réalisées à l'aide d'un outil interne de modélisation du comportement d'une CRBM basé sur la théorie des images. A l'aide du test d'ajustement statistique d'Anderson-Darling, nous avons montré que le comportement de la chambre en ondes millimétriques est en adéquation avec le modèle de Hill (champ statistiquement homogène et isotrope dans le volume de l'enceinte) . Dans un second temps, nous avons réalisé un prototype de chambre réverbérante de dimensions internes : 42,3 x 41,2 x 38,3 cm3 . Un processus de brassage par saut de fréquence est utilisé pour l'obtention de l'uniformité statistique de la densité de puissance. La chambre est équipée d'un système de positionnement fin et précis permettant l'échantillonnage spatial de la puissance sur un axe à l'intérieur de la chambre. Les accès millimétriques ont également été étudiés de sorte à réduire d'éventuelles fuites significatives. Les liaisons entre la source millimétrique et l'antenne d'émission d'une part et celles entre l'antenne de réception et l'analyseur de spectre d'autre part sont assurées par des guides d'onde. Nous avons également mis en place l'ensemble des équipements nécessaires pour le fonctionnement de la chambre (source, analyseur de spectre, mélangeur). La chambre est caractérisée dans la bande 58,5-61,5 GHz. Les résultats obtenus sont satisfaisants en termes de coefficient de qualité et de comportement statistique de la puissance mesurée dans un volume de test donné. Dans un troisième temps, nous avons modélisé puis réalisé une interface intégrée sur une des parois de la chambre pour la mesure de température par caméra infrarouge. Des mesures préliminaires sont réalisées sur un fantôme constitué essentiellement d'eau. Les résultats expérimentaux et théoriques de l'évaluation du gradient de la température sur le fantôme sont très proches. Ceci confirme que la chambre réverbérante ainsi conçue permet de soumettre l'objet sous test à une illumination statistiquement uniforme et calibrée en puissance. Un tel dispositif est un atout précieux pour des tests de compatibilité électromagnétique d'équipements électroniques dans la bande 26,5-75 GHz. Cette CRBM pourrait également permettre de réal iser des essais préliminaires dans le cadre de l'étude des interactions des ondes avec la matière vivante en millimétrique.
Author : Philippe Besnier
Publisher : John Wiley & Sons
ISBN 13 : 1118602153
Total Pages : 299 pages
Book Rating : 4.1/5 (186 download)
Download or read book Electromagnetic Reverberation Chambers written by Philippe Besnier and published by John Wiley & Sons. This book was released on 2013-02-07 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dedicated to a complete presentation on all aspects of reverberation chambers, this book provides the physical principles behind these test systems in a very progressive manner. The detailed panorama of parameters governing the operation of electromagnetic reverberation chambers details various applications such as radiated immunity, emissivity, and shielding efficiency experiments. In addition, the reader is provided with the elements of electromagnetic theory and statistics required to take full advantage of the basic operational rules of reverberation chambers, including calibration procedures. Comparisons with other testing systems (TEM cells, anechoic chambers) are also discussed.
Author : Luca Musso
Publisher :
ISBN 13 :
Total Pages : 120 pages
Book Rating : 4.:/5 (492 download)
Download or read book Assessment of reverberation chamber testing for automotive applications written by Luca Musso and published by . This book was released on 2003 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'intérêt de l'industrie automobile vers les chambres réverbérantes pour des essais en compatibilité électromagnétique a augmenté considérablement dans les dernières années. Cet intérêt vient de la possibilité d'exploiter certaines propriétés des chambres réverbérantes pour optimiser le procédé industriel de validation CEM. Cependant, plusieurs aspects théoriques qui sont à la base d'une méthodologie de test en chambre reverbérante restent à être explorés ou clarifiés. Certains de ces aspects sont approfondis dans cette thèse, dans l'optique des tests en immunité rayonnée pour des applications automobiles. La qualification de l'environnement électromagnétique d'une chambre réverbérante est d'abord considérée, avec une attention particulière vers l'incertitude de mesure et l'effet de charge du a l'introduction d'une voiture dans la chambre. Une approche statistique originale pour modéliser le couplage des champs avec des objets électriques est ensuite proposée et appliquée à l'analyse du couplage du champ avec le réseau électrique d'un véhicule. La reproductibilité des essais et la corrélation avec les résultats obtenus en chambre anéchoique sont enfin étudiées par voie théorique et par voie expérimentale au moyen de la répétition des essais effectués sur un dispositif électronique dans plusieurs chambres réverbérantes et dans une chambre semi-anéchoique.
Author : Damien Warin
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (493 download)
Download or read book Exploitation de l'environnement electromagnetique genere dans une chambre reverberante a brasseur de modes pour l'evaluation du seuil de dysfonctionnement de circuits integres written by Damien Warin and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : TERRE Michel
Publisher : Lavoisier
ISBN 13 : 2746289067
Total Pages : 226 pages
Book Rating : 4.7/5 (462 download)
Download or read book Systèmes sans fil : problèmes résolus written by TERRE Michel and published by Lavoisier. This book was released on 2012-09-05 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Universellement accessibles et permettant la mobilité, les systèmes sans fil connaissent un usage croissant. Cependant, le débit et la qualité de service ne sont pas encore au niveau des systèmes filaires. Par une approche macroscopique des systèmes sans fil, cet ouvrage répond aux questions de puissance, de débit, d'accès multiple, d'organisation cellulaire et d'organisation des réseaux d'accès. Ce livre met en application les principes fondamentaux des systèmes de télécommunications sans fil. Les grands concepts technologiques des systèmes radio (F/TDMA, GSM, CDMA, UMTS, OFDM, LTE, MIMO et UWB) et leurs principaux résultats théoriques sont présentés. Une série de problèmes résolus ayant pour objet d'établir des éléments du bilan de liaison global de différents systèmes de radiocommunications est proposée.
Author :
Publisher :
ISBN 13 :
Total Pages : 752 pages
Book Rating : 4.:/5 (334 download)
Download or read book Annales des télécommunications written by and published by . This book was released on 2005-07 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Per-Simon Kildal
Publisher : Professional Pub Service
ISBN 13 : 9789144013183
Total Pages : 395 pages
Book Rating : 4.0/5 (131 download)
Download or read book Foundations of Antennas written by Per-Simon Kildal and published by Professional Pub Service. This book was released on 2000-01-01 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a modern textbook. The formulas for the radiation fields from different antennas are expressed in a compact and unified way by means of the direct vector integral relations between fields and currents. Thereby the formulas become easy to apply and interpret. The Moment Method is introduced as a basic principle in field theory, and it is used together with the equivalence principle to derive the classical formulas in antenna theory. The book comes with a CD-ROM. This contains the over 50 computer programs which have been used to produce the results in all the graphs in the book. These computer programs are referred to as Mathcad Documents. They can be run without buying extra software, and without having any previous knowledge of Mathcad. The Mathcad Documents provided can be used for initial designs of dipole, slot, microstrip, horn, reflector and array antennas (by classical formulas). Good initial designs will reduce the time and cost needed for fine tuning of performance with more advanced CAD software. The Mathcad Documents can also be used to validate other software. The CD-ROM also contains HTML slides of all the material in the book.
Author : Trevor G. Bond
Publisher : Psychology Press
ISBN 13 : 1135602646
Total Pages : 358 pages
Book Rating : 4.1/5 (356 download)
Download or read book Applying the Rasch Model written by Trevor G. Bond and published by Psychology Press. This book was released on 2013-11-05 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written in an accessible style, this book facilitates a deep understanding of the Rasch model. Authors Bond and Fox review the crucial properties of the Rasch model and demonstrate its use with a wide range of examples including the measurement of educational achievement, human development, attitudes, and medical rehabilitation. A glossary and numerous illustrations further aid the reader's understanding. The authors demonstrate how to apply Rasch analysis and prepare readers to perform their own analyses and interpret the results. Updated throughout, highlights of the Second Edition include: a new CD that features an introductory version of the latest Winsteps program and the data files for the book’s examples, preprogrammed to run using Winsteps; a new chapter on invariance that highlights the parallels between physical and human science measurement; a new appendix on analyzing data to help those new to Rasch analysis; more explanation of the key concepts and item characteristic curves; a new empirical example with data sets demonstrates the many facets of the Rasch model and other new examples; and an increased focus on issues related to unidimensionality, multidimensionality, and the Rasch factor analysis of residuals. Applying the Rasch Model is intended for researchers and practitioners in psychology, especially developmental psychologists, education, health care, medical rehabilitation, business, government, and those interested in measuring attitude, ability, and/or performance. The book is an excellent text for use in courses on advanced research methods, measurement, or quantitative analysis. Significant knowledge of statistics is not required.
Author : Ximena Zuniga
Publisher : John Wiley & Sons
ISBN 13 : 1118209702
Total Pages : 154 pages
Book Rating : 4.1/5 (182 download)
Download or read book Intergroup Dialogue in Higher Education: Meaningful Learning About Social Justice written by Ximena Zuniga and published by John Wiley & Sons. This book was released on 2011-10-13 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intergroup dialogue promotes student engagement across cultural and social divides on college campuses through a face-to-face, interactive, and facilitated learning experience that brings together twelve to eighteen students from two or more social identity groups over a sustained period of time. Students in intergroup dialogue explore commonalities and differences; examine the nature and impact of discrimination, power, and privilege; and find ways of working together toward greater inclusion, equality, and social justice. Intergroup dialogue is offered as a cocurricular activity on some campuses and as a course or part of a course on others. The practice of intergroup dialogue is considered a substantive and meaningful avenue for preparing college graduates with the knowledge, commitment, and skills essential for living and working in a diverse yet socially stratified society. The research evidence supports the promise of intergroup dialogues to meet its educational goals?consciousness raising, building relationships across differences and conflicts, and strengthening individual and collective capacities to promote social justice. This volume outlines the theory, practice, and research on intergroup dialogue. It also offers educational resources to support the practice of intergroup dialogue. Addressing faculty, administrators, student affairs personnel, students, and practitioners, this volume is a useful resource for anyone implementing intergroup dialogues in higher education. This is the 4th issue of the 32nd volume of the Jossey-Bass report series ASHE Higher Education Report Series. Each monograph in the series is the definitive analysis of a tough higher education problem, based on thorough research of pertinent literature and institutional experiences. Topics are identified by a national survey. Noted practitioners and scholars are then commissioned to write the reports, with experts providing critical reviews of each manuscript before publication.
Author : Patricia Gurin
Publisher : University of Michigan Press
ISBN 13 : 9780472113071
Total Pages : 238 pages
Book Rating : 4.1/5 (13 download)
Download or read book Defending Diversity written by Patricia Gurin and published by University of Michigan Press. This book was released on 2004-02-27 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: DIVThe first major book to argue in favor of affirmative action in higher education since Bowen and Bok's The Shape of the River /div
Author : Dr. Reinaldo J. Perez
Publisher : John Wiley & Sons
ISBN 13 : 111908279X
Total Pages : 768 pages
Book Rating : 4.1/5 (19 download)
Download or read book Handbook of Aerospace Electromagnetic Compatibility written by Dr. Reinaldo J. Perez and published by John Wiley & Sons. This book was released on 2018-11-30 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive resource that explores electromagnetic compatibility (EMC) for aerospace systems Handbook of Aerospace Electromagnetic Compatibility is a groundbreaking book on EMC for aerospace systems that addresses both aircraft and space vehicles. With contributions from an international panel of aerospace EMC experts, this important text deals with the testing of spacecraft components and subsystems, analysis of crosstalk and field coupling, aircraft communication systems, and much more. The text also includes information on lightning effects and testing, as well as guidance on design principles and techniques for lightning protection. The book offers an introduction to E3 models and techniques in aerospace systems and explores EMP effects on and technology for aerospace systems. Filled with the most up-to-date information, illustrative examples, descriptive figures, and helpful scenarios, Handbook of Aerospace Electromagnetic Compatibility is designed to be a practical information source. This vital guide to electromagnetic compatibility: • Provides information on a range of topics including grounding, coupling, test procedures, standards, and requirements • Offers discussions on standards for aerospace applications • Addresses aerospace EMC through the use of testing and theoretical approaches Written for EMC engineers and practitioners, Handbook of Aerospace Electromagnetic Compatibility is a critical text for understanding EMC for aerospace systems.
Author : Rebecca Hampl
Publisher : Christian Faith Publishing, Inc.
ISBN 13 : 1098051017
Total Pages : 533 pages
Book Rating : 4.0/5 (98 download)
Download or read book The Challenge of Change written by Rebecca Hampl and published by Christian Faith Publishing, Inc.. This book was released on 2022-08-01 with total page 533 pages. Available in PDF, EPUB and Kindle. Book excerpt: At the age of twenty-eight, Marty Ellis is still a bachelor who graduated with a major in journalism and a minor in photojournalism. He enjoys his life with various girlfriends while knocking back drinks in bars, going out to dinner, and rolling in the sheets. Yet inevitably, he grows tired of these surface-level-only feelings, shells out his standard goodbye speech, and moves on. However, using only his body and saying sayonara to his love lifeaEUR(tm)s revolving door is not how he wants to live for the rest of his life. How will he ever know what true love feels like if he doesnaEUR(tm)t ascertain how to actually give it? In what way will he begin to be able to discover the whole package that runs beneath the surface of a woman? Unexpectedly, Marty is blindsided when his best friend invites him to leave New Jersey for a weekend trip. Lauren Morris is a beautiful thirty-two-year-old woman who, after graduating at the age of twenty-one with a masteraEUR(tm)s degree in business, took a huge leap of faith and purchased an old farmhouse in Vermont. After ten years of hard work and sweat equity, she has transformed it into a beautiful inn that has become extremely lucrative. But winter is fast approaching, and she is dreading that feeling of loneliness that is connected to darkened afternoons and long, empty nights. Will a man ever enter her life? One that she could love and perhaps be with until death due them part? After meeting Marty, Lauren begins to consider if this man might be the one she has been waiting for her whole life. But then again, she is older than he is; long distance relationships hardly ever work out; and sudden heartbreaking unforeseen events rock both of their worlds. And if they do fall in love, which one of them will have to make the ultimate sacrifice and give up what theyaEUR(tm)ve worked so hard to achieve in order to be together? With so many changes causing so many challenges, will they get through them together, or will one push the other away?
Author : Petar Stankov
Publisher : Routledge
ISBN 13 : 100020071X
Total Pages : 94 pages
Book Rating : 4.0/5 (2 download)
Download or read book The Political Economy of Populism written by Petar Stankov and published by Routledge. This book was released on 2020-07-21 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Political Economy of Populism explores the interplay between identity, the economy and inequality to explain the dynamics of populist votes since the beginning of the 20th century. The book discusses the political and economic implications of populist governance using data on populist incumbencies and linking it to historical data on the macro economy and democracy. Chapters draw from the most recent political science, economics and other social science literature, as well as historical data, to explain the long-term causes and consequences of populism. Populism emerges and gains traction when political entrepreneurs exploit underlying identity conflicts for political gains. As the distributional consequences of both economic distress and economic growth typically favor the elite over the poor and the lower middle class, economic shocks usually sharpen the underlying identity conflicts between the groups. The book provides evidence of significant differences in the ways fiscal and monetary policies are conducted by incumbent populists in Latin America, Europe and the OECD. The work concludes by suggesting avenues through which a 21st century social consensus can be built, so that our society can avoid repeating the mistakes that led to wars and failed economic experiments in the 20th century. The Political Economy of Populism marks a significant contribution to the study of populism and is suited to students and scholars across the social sciences, including economics, political science and sociology.
Author : Trevor Bond
Publisher : Routledge
ISBN 13 : 1317805259
Total Pages : 412 pages
Book Rating : 4.3/5 (178 download)
Download or read book Applying the Rasch Model written by Trevor Bond and published by Routledge. This book was released on 2015-06-05 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cited over 1900 times, this classic text facilitates a deep understanding of the Rasch model. The authors review the crucial properties of the model and demonstrate its use with a variety of examples from education, psychology, and health. A glossary and numerous illustrations aid the reader's understanding. Readers learn how to apply Rasch analysis so they can perform their own analyses and interpret the results. The authors present an accessible overview that does not require a mathematical background. Highlights of the new edition include: -More learning tools to strengthen readers’ understanding including chapter introductions, boldfaced key terms, chapter summaries, activities, and suggested readings. -Divided chapters (4, 6, 7 & 8) into basic and extended understanding sections so readers can select the level most appropriate for their needs and to provide more in-depth investigations of key topics. -A website at www.routledge.com/9780415833424 that features free Rasch software, data sets, an Invariance worksheet, detailed instructions for key analyses, and links to related sources. -Greater emphasis on the role of Rasch measurement as a priori in the construction of scales and its use post hoc to reveal the extent to which interval scale measurement is instantiated in existing data sets. -Emphasizes the importance of interval level measurement data and demonstrates how Rasch measurement is used to examine measurement invariance. -Insights from other Rasch scholars via innovative applications (Ch. 9). -Extended discussion of invariance now reviews DIF, DPF, and anchoring (ch. 5). -Revised Rating Scale Model material now based on the analysis of the CEAQ (ch.6). -Clarifies the relationships between Rasch measurement, True Score Theory, and Item Response Theory by reviewing their commonalities and differences (Ch.13). -Provides more detail on how to conduct a Rasch analysis so readers can use the techniques on their own (Appendix B). Intended as a text for graduate courses in measurement, item response theory, (advanced) research methods or quantitative analysis taught in psychology, education, human development, business, and other social and health sciences, professionals in these areas also appreciate the book‘s accessible introduction.
