Download or read book Contribution la recherche de topologies d antennes pour des applications RFID written by Hamza Chaabane and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les travaux de recherche s'inscrivent dans le cadre du projet intitulé « PAC-ID Grande Distribution » du Pôle de compétitivité « Solutions Communicantes Sécurisées ». Ce projet, d'une durée de trente mois, vise à promouvoir le déploiement en volume de la technologie RFID en bande UHF dans le secteur de la grande distribution. Il rassemble plusieurs entreprises ayant un rôle clé dans le domaine de la RFID. En effet, comme utilisateur potentiels finaux de la technologie RFID, on retrouve aussi bien un acteur important du monde de la grande distribution, en l'occurrence l'entreprise Carrefour, qu'un représentant des PME, Malongo. Les entreprises IBM et Orange se focalisent sur la gestion de données RFID et l'implémentation du système informatique. A côté de cela, une nouvelle génération de puces RFID est développée par la société ST Microelectronics. L'expertise des sociétés IER et TAGSYS dans le domaine de la fabrication aussi bien d'étiquettes que de lecteurs RFID permet de faire le lien entre l'ensemble de ces acteurs et d'apporter des réponses techniques aux différents besoins métiers exprimés. A l'intérieur de ce projet d'envergure, l'intervention du Laboratoire de Conception et d'Intégration des Systèmes (LCIS) sur un plan d'avantage exploratoire, a consisté à développer un procédé original de conception automatisé de tags RFID adaptés aux contraintes de la grande distribution. Ce travail nous a permis de monter les performances de la méthodologie de conception d'antennes pour les tags RFID en bande UHF introduite. Une application permettant d'automatiser la conception d'antennes basées sur l'utilisation d'un logiciel de simulation RF a été introduite. Cette application pourrait parfaitement être implémentée sur le logiciel lui-même afin de venir compléter les outils de CAO déjà présent.

Download or read book Conception d antennes et m thode de caract risation des syst mes RFID UHF en champ proche et en champ lointain written by Aline Coelho de Souza and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: La technologie d'identification par radiofréquence (RFID) a eu un essor très important ces dernières années notamment grâce à sa configuration polyvalente et aux innombrables possibilités d'intégration offertes par cette technologie notamment avec l'apparition d'un nouveau contexte applicatif celui des objets connectés. Depuis quelques années, des applications de la RFID UHF en champ proche ont été notamment développées afin de surmonter les problèmes liés à la dégradation de lecture des tags lorsqu'ils sont placés dans des milieux fortement perturbateurs. Les travaux de recherche présentés dans cette thèse s'intéressent à l'étude de la technologie RFID UHF en zones de champ proche et de champ lointain. Les études portent plus particulièrement sur la conception d'antennes lecteur et d'antennes tag ainsi que sur les méthodes de caractérisation des systèmes RFID en zones de champ proche et de champ lointain. Une étude sur les caractéristiques des champs rayonnées par une antenne est réalisée afin de souligner les critères les plus pertinents en vue de concevoir des antennes pour les lecteurs RFID, performantes en zone de champ proche. A partir de l'état de l'art sur les antennes tags et les méthodologies de conception classiques, une nouvelle approche de conception est développée qui vise à améliorer la conception d'antennes tags en intégrant une vision appropriée pour tenir compte du niveau de puissance espéré dans une application donnée. Enfin avec pour objectif la caractérisation des tags RFID UHF, d'une part une approche est proposée permettant l'identification de familles de tags, et d'autre part, une procédure innovante pour la mesure de l'efficacité du transfert de puissance est proposée et validée expérimentalement.

Download or read book Contribution au d veloppement d antennes lecteurs champ proche pour les syst mes RFID UHF passifs written by Mossaab Daiki and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: La RFID est une technologie majeure qui connaît depuis plus d'une dizaine d'années un essor considérable en termes d'applications. Cependant son déploiement à grande échelle reste limité par des plusieurs verrous technique et technologique par lesquels la portée de lecture des tags et leur forte sensibilité à l'environnement de l'application. Le travail engagé dans cette thèse vise le développement des nouvelles antennes lecteurs pour systèmes RFID UHF champ proche. Ce type de système exploite la bande UHF de la RFID en zone de champ proche pour la traçabilité des cibles de taille miniature sur une zone proche du lecteur avec une portée limitée. Les tags se trouvant au delà de cette portée ne doivent pas être détectés par le lecteur. L'objectif dans ce travail est d'apporter des solutions au niveau des antennes lecteurs également celles du tag pour assurer une détection des tags sur une zone confinée de l'espace. Actuellement, moyennant l'utilisation d'un tag sous forme de boucle (1*1 cm2), il est possible de lire ce dernier en contact, c'est à dire dans la zone 0 - 10 cm. Il fallait donc pouvoir assurer une lecture fiable (de type couplage EM) pour une portée s'étendant d'une dizaine de centimètres. Les antennes lecteurs champ proche développés dans ce travail sont en mesure d'assurer une zone de lecture limitée (20 à 35 cm) qui s'étend sur une dizaine de centimètres de côté.

Download or read book 3G Evolution written by Erik Dahlman and published by Academic Press. This book was released on 2007 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: This practical book, written by engineers working closely in 3GPP, gives insight into the new technologies adopted by 3GPP, with detailed explanations of the specific solutions chosen and their implementation in HSPA and LTE. The key technologies presented include multi-carrier transmission, advanced single-carrier transmission, advanced receivers, OFDM, MIMO and adaptive antenna solutions, advanced radio resource management and protocols, and different radio network architectures. Their role and use in the context of mobile broadband access in general is explained. Both a high-level overview and more detailed step-by-step explanations of HSPA and LTE implementation are given. An overview of other related systems such as TD SCDMA, CDMA2000, and WIMAX is also provided.This is a ‘must-have’ resource for engineers and other professionals working with cellular or wireless broadband technologies who need to know how to utilize the new technology to stay ahead of the competition. Gives the first explanation of the radio access technologies and key international standards for moving to the next stage of 3G evolution- fully operational mobile broadband Describes the new technologies selected by the 3GPP to realise High Speed Packet Access (HSPA) and Long Term Evolution (LTE) for mobile broadband Gives both higher-level overviews and detailed explanations of HSPA and LTE as specified by 3GPP

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.

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)

Download or read book The Disappearing Computer written by Norbert Streitz and published by Springer. This book was released on 2007-07-20 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines how the computer, as we currently know it, will be replaced by a new generation of technologies, moving computing off the desktop and ultimately integrating it with real world objects and everyday environments. It provides a unique combination of concepts, methods and prototypes of ubiquitous and pervasive computing reflecting the current interest in smart environments and ambient intelligence.

Download or read book Wireless Power Transmission for Sustainable Electronics written by Nuno Borges Carvalho and published by John Wiley & Sons. This book was released on 2020-02-19 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a collection of works produced by COST Action IC1301 with the goal of achieving significant advances in the field of wireless power transmission This book constitutes together information from COST Action IC1301, a group of academic and industry experts seeking to align research efforts in the field of wireless power transmission (WPT). It begins with a discussion of backscatter as a solution for Internet of Things (IoT) devices and goes on to describe ambient backscattering sensors that use FM broadcasting for low cost and low power wireless applications. The book also explores localization of passive RFID tags and augmented tags using nonlinearities of RFID chips. It concludes with a review of methods of electromagnetic characterization of textile materials for the development of wearable antennas. Wireless Power Transmission for Sustainable Electronics: COST WiPE - IC1301 covers textile-supported wireless energy transfer, and reviews methods for the electromagnetic characterization of textile materials for the development of wearable antennas. It also looks at: backscatter RFID sensor systems for remote health monitoring; simultaneous localization (of robots and objects) and mapping (SLAM); autonomous system of wireless power distribution for static and moving nodes of wireless sensor networks; and more. Presents techniques for smart beam-forming for "on demand" wireless power transmission (WPT) Discusses RF and microwave energy harvesting for space applications Describes miniaturized RFID transponders for object identification and sensing Wireless Power Transmission for Sustainable Electronics: COST WiPE - IC1301 is an excellent book for both graduate students and industry engineers involved in wireless communications and power transfer, and sustainable materials for those fields.

Download or read book Pervasive Mobile and Ambient Wireless Communications written by Roberto Verdone and published by Springer Science & Business Media. This book was released on 2012-01-02 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reporting the findings of COST 2100, a major European intergovernmental project, this volume offers system designers a good source of guidelines based on channel characterization and measurement-based modeling, as well as worthwhile ideas for future research.

Download or read book Max Weber and Karl Marx written by Karl Lowith and published by Routledge. This book was released on 2002-11-01 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: First Published in 2004. Lowith's study of Max Weber and Karl Marx is a key text in modem interpretations of the theme of alienation in Marxist theory and rationalisation in Weber's sociology. It remains the best short student introduction to the differences and comparisons between these essential thinkers. This new edition includes a Preface by Professor Bryan S. Turner which demonstrates the relevance of the book for contemporary sociology.

Download or read book Quantum Communications and Cryptography written by Alexander V. Sergienko and published by CRC Press. This book was released on 2018-10-03 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: All current methods of secure communication such as public-key cryptography can eventually be broken by faster computing. At the interface of physics and computer science lies a powerful solution for secure communications: quantum cryptography. Because eavesdropping changes the physical nature of the information, users in a quantum exchange can easily detect eavesdroppers. This allows for totally secure random key distribution, a central requirement for use of the one-time pad. Since the one-time pad is theoretically proven to be undecipherable, quantum cryptography is the key to perfect secrecy. Quantum Communications and Cryptography is the first comprehensive review of the past, present, and potential developments in this dynamic field. Leading expert contributors from around the world discuss the scientific foundations, experimental and theoretical developments, and cutting-edge technical and engineering advances in quantum communications and cryptography. The book describes the engineering principles and practical implementations in a real-world metropolitan network as well as physical principles and experimental results of such technologies as entanglement swapping and quantum teleportation. It also offers the first detailed treatment of quantum information processing with continuous variables. Technologies include both free-space and fiber-based communications systems along with the necessary protocols and information processing approaches. Bridging the gap between physics and engineering, Quantum Communications and Cryptography supplies a springboard for further developments and breakthroughs in this rapidly growing area.

Download or read book VANET written by Sonali P. Botkar and published by CRC Press. This book was released on 2021-03-16 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: VANET (vehicular ad hoc network) is a subgroup of MANET (mobile ad hoc network). It enables communication among vehicles on the road and between related infrastructures. This book addresses the basic elements of VANET along with components involved in the communication with their functionalities and configurations. It contains numerous examples, case studies, technical descriptions, scenarios, procedures, algorithms, and protocols, and addresses the different services provided by VANET with the help of a scenario showing a network tackling an emergency. Features: • Covers all important concepts of VANET for beginners and different road scenarios in VANET • Covers essential communication protocols in VANET • Introduces approaches for VANET implementation using simulators • Provides a classification of messages and a priority-based message forwarding strategy This book is aimed at undergraduates, postgraduates, industry, researchers, and research scholars in information and communications technology.

Download or read book Principles of Radar and Sonar Signal Processing written by Chevalier François Le and published by Artech House. This book was released on 2002 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electromagnetic Metrology written by and published by . This book was released on 1975 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gas pressure Bonding written by S. J. Paprocki and published by . This book was released on 1961 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Engineering Acoustics written by Michael Möser and published by Springer Science & Business Media. This book was released on 2009-09-01 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Suitable for both individual and group learning, Engineering Acoustics focuses on basic concepts and methods to make our environments quieter, both in buildings and in the open air. The author’s tutorial style derives from the conviction that understanding is enhanced when the necessity behind the particular teaching approach is made clear. He also combines mathematical derivations and formulas with extensive explanations and examples to deepen comprehension. Fundamental chapters on the physics and perception of sound precede those on noise reduction (elastic isolation) methods. The last chapter deals with microphones and loudspeakers. Moeser includes major discoveries by Lothar Cremer, including the optimum impedance for mufflers and the coincidence effect behind structural acoustic transmission. The appendix gives a short introduction on the use of complex amplitudes in acoustics.

Download or read book Sticky Knowledge written by Gabriel Szulanski and published by SAGE. This book was released on 2002-12-03 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Why don′t best practices spread within firms? What exactly is sticky knowledge? Having recognized that knowledge assets are rapidly becoming their most precious source of competitive advantage, a large number of organizations are now attempting to transfer best practices. Yet best practices still remain stubbornly immobile. Sticky Knowledge reveals that the transfer of practices is a complex phenomenon, and demonstrates the range of barriers to transferring best practices within the firm. Written in a brief and accessible format, Gabriel Szulanski defines the popular concept of stickiness and its operationalization, providing a roadmap for understanding and further researching this topical issue. Taking a fresh look at accepted wisdom, and presenting research findings that conflict with some established views, the book will be essential reading for academics and students addressing issues related to knowledge and the firm. Practising managers and MBA students will also find it of immense value.