Communication radiofréquence à très basse consommation d'énergie dans un environnement hautement perturbé PDF Download
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Author: Fabrice Roudet
Publisher:
ISBN:
Category :
Languages : fr
Pages : 172
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Book Description
Les nouvelles habitudes nées de la disponibilité à disposer de moyens de communication sans fil seront exprimés demain dans le monde industriel. Il en découlera de nouvelles opportunités de développement mais également de nouveaux challenges à résoudre : comment choisir la technologie de communication la mieux adaptée à un produit ? Comment améliorer la robustesse d’un système sans pénaliser son coût ? Ou encore comment concilier sécurité et interopérabilité ? ... Ce mémoire apporte une contribution au developpement d'un produit nécessitant d’établir une communication sans fil dans un environnement industriel hautement perturbé : une armoire électrique. Parmi toutes les technologies de communication sans fil existantes, c’est la RFID qui a été retenue. Bien qu’étant faite pour la traçabilité des objets, cette technologie présente plusieurs avantages pour notre application : téléalimentation, faible encombrement et bas coût. Après adaptation à notre environnement, nous avons détourné l’usage de la RFID afin d’utiliser les tags comme des « capteurs ».
Author: Fabrice Roudet
Publisher:
ISBN:
Category :
Languages : fr
Pages : 172
Get Book Here
Book Description
Les nouvelles habitudes nées de la disponibilité à disposer de moyens de communication sans fil seront exprimés demain dans le monde industriel. Il en découlera de nouvelles opportunités de développement mais également de nouveaux challenges à résoudre : comment choisir la technologie de communication la mieux adaptée à un produit ? Comment améliorer la robustesse d’un système sans pénaliser son coût ? Ou encore comment concilier sécurité et interopérabilité ? ... Ce mémoire apporte une contribution au developpement d'un produit nécessitant d’établir une communication sans fil dans un environnement industriel hautement perturbé : une armoire électrique. Parmi toutes les technologies de communication sans fil existantes, c’est la RFID qui a été retenue. Bien qu’étant faite pour la traçabilité des objets, cette technologie présente plusieurs avantages pour notre application : téléalimentation, faible encombrement et bas coût. Après adaptation à notre environnement, nous avons détourné l’usage de la RFID afin d’utiliser les tags comme des « capteurs ».
Author: Fernando P¿rez Font¿n
Publisher: John Wiley & Sons
ISBN: 0470751738
Category : Technology & Engineering
Languages : en
Pages : 268
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Book Description
A practical tool for propagation channel modeling with MATLAB® simulations. Many books on wireless propagation channel provide a highly theoretical coverage, which for some interested readers, may be difficult to follow. This book takes a very practical approach by introducing the theory in each chapter first, and then carrying out simulations showing how exactly put the theory into practice. The resulting plots are analyzed and commented for clarity, and conclusions are drawn and explained from the obtained results. Key features include: A unique approach to propagation channel modeling with accompanying MATLAB® simulations to demonstrate the theory in practice Contains step by step commentary and analysis of the obtained simulation results in order to provide a comprehensive and structured learning tool Covers a wide range of topics including shadowing effects, coverage and interference, Multipath Narrowband channel, Multipath Wideband channel, propagation in micro and pico-cells, the land mobile satellite (LMS) channel, the directional Multipath channel and MIMO and propagation effects in fixed radio links (terrestrial and satellite) The book comes with an accompanying website that contains the MATLAB® simulations and allows readers to try them out themselves Well suited for lab-use, as reference and as a self-learning tool both for advanced students and professionals Modeling the Wireless Propagation Channel: A simulation approach with MATLAB® will be best suited for postgraduate (Masters and PhD) students and practicing engineers in telecommunications and electrical engineering fields, who are seeking to familiarise themselves with the topic without too many formulas. The book will also be of interest to network engineers, system engineers and researchers
Author: Norbert Streitz
Publisher: Springer
ISBN: 3540727272
Category : Computers
Languages : en
Pages : 314
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Book Description
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.
Author: Annette Prüss-Üstün
Publisher: World Health Organization
ISBN: 9241565195
Category : Medical
Languages : en
Pages : 173
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Book Description
"The main message emerging from this new comprehensive global assessment is that premature death and disease can be prevented through healthier environments--and to a significant degree. Analysing the latest data on the environment-disease nexus and the devastating impact of environmental hazards and risks on global health, backed up by expert opinion, this report covers more than 130 diseases and injuries. The analysis shows that 23% of global deaths (and 26% of deaths among children under five) are due to modifiable environmental factors--and therefore can be prevented. Stroke, ischaemic heart disease, diarrhoea and cancers head the list. People in low-income countries bear the greatest disease burden, with the exception of noncommunicable diseases. The report's unequivocal evidence should add impetus to coordinating global efforts to promote healthy environments--often through well-established, cost-effective interventions. This analysis will inform those who want to better understand the transformational spirit of the Sustainable Development Goals agreed by Heads of State in September 2015. The results of the analysis underscore the pressing importance of stronger intersectoral action to create healthier environments that will contribute to sustainably improving the lives of millions around the world."--Page 4 of cover.
Author: IARC Working Group on the Evaluation of Carcinogenic Risks to Humans
Publisher: IARC Monographs on the Evaluat
ISBN: 9789283201472
Category : Medical
Languages : en
Pages : 0
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Book Description
"This publication represents the views and expert opinions of an IARC Working Group on the Evaluation of Carcinogenic Risk to Humans, which met in Lyon, 8-15 October 2013."
Author: Dick Richardson
Publisher: Routledge
ISBN: 1134844026
Category : Political Science
Languages : en
Pages : 290
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Book Description
The Green Challenge is an up-to-date and comprehensive account of the development of Green parties in Western Europe, and includes an account of the development since 1989 of an East European Green movement. Blending theory and empirical analysis, the book contains chapters on each of the main western European cases and on a number of other less-studied ones. These are designed to demonstrate the shifting balance of party-political competition the factor the authors believe most strongly influences the fortunes of the Greens. The editors also integrate a valuable analysis of the environmentally-degraded Czech Republic, where the Green parties' lack of electoral success has puzzled many observers.
Author: Agnes Buka
Publisher: World Scientific
ISBN: 1848167997
Category : Science
Languages : en
Pages : 299
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Book Description
The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Author: Philippe Goujon
Publisher: Peeters Publishers
ISBN: 9789042909502
Category : Philosophy
Languages : en
Pages : 76
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Book Description
Technology and Ethics. A European Quest for Responsible Engineering, edited by B. Heriard Dubreuil and his team (University Lille) is in many regards an innovative publication. It is the first fully European contribution to the field of engineering ethics and the result of an intensive cooperation between ethicists and engineers from all the member countries of the European Union. The basic structure of the book is both the distinction and interaction between three levels of analysis: personal responsibility of engineers, the institutional level (business organisations) and the impact of technology on society and culture. On the personal level, the book deals with problems such as the role of professional codes and the fact that engineers must cope with flexibility, shorter lines of decision and erosion of the boundaries between private and professional life. On the meso level, the book deals with different aspects of decision making in the context of business organizations, such as quality management, technology assessment procedures, business ethics committees etc... On the macro level, the authors focus on the power of technology. Together with the influences from other social, economic and political actors, the decisions of engineers change the world in a way which is of moral significance.
Author: Chevalier François Le
Publisher: Artech House
ISBN: 9781608071357
Category : Radar
Languages : en
Pages : 422
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Book Description
Author: Rob Flickenger
Publisher: "O'Reilly Media, Inc."
ISBN: 9780596005023
Category : Computers
Languages : en
Pages : 190
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Book Description
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.
