An international manual is like a world cruise: a once-in-a-lifetime experience. All the more reason to consider carefully whether it is necessary. This can hardly be the case if previous research in the selected field has already been the subject of an earlier review-or even several competing surveys. On the other hand, more thorough study is necessary if the intensity and scope of research are increasing without comprehensive assessments. That was the situation in Western societies when work began on this project in the summer of 1998. It was then, too, that the challenges emerged: any manual, espe cially an international one, is a very special type of text, which is anything but routine. It calls for a special effort: the "state of the art" has to be documented for selected subject areas, and its presentation made as compelling as possible. The editors were delighted, therefore, by the cooperation and commitment shown by the eighty-one contributors from ten countries who were recruited to write on the sixty-two different topics, by the con structive way in which any requests for changes were dealt with, and by the patient re sponse to our many queries. This volume is the result of a long process. It began with the first drafts outlining the structure of the work, which were submitted to various distinguished colleagues. Friedheim Neidhardt of Berlin, Gertrud Nunner-Winkler of Munich, and Roland Eckert of Trier, to name only a few, supplied valuable comments at this stage.
The demand for wireless access to network services is growing in virtually all communications and computing applications. Once accustomed to unteathered opera tion, users resent being tied to a desk or a fixed location, but will endure it when there is some substantial benefit, such as higher resolution or bandwidth. Recent technolog ical advances, however, such as the scaling of VLSI, the development of low-power circuit design techniques and architectures, increasing battery energy capacity, and advanced displays, are rapidly improving the capabilities of wireless devices. Many of the technological advances contributing to this revolution pertain to the wireless medium itself. There are two viable media: radio and optical. In radio, spread-spectrum techniques allow different users and services to coexist in the same bandwidth, and new microwave frequencies with plentiful bandwidth become viable as the speed of the supporting low-cost electronics increases. Radio has the advantage of being available ubiquitously indoors and outdoors, with the possibility of a seam less system infrastructure that allows users to move between the two. There are unan swered (but likely to be benign) biological effects of microwave radiation at higher power densities. Optical communications is enhanced by advances in photonic devices, such as semiconductor lasers and detectors. Optical is primarily an indoor technology - where it need not compete with sunlight - and offers advantages such as the immediate availability of a broad bandwidth without the need for regulatory approval.
This book concerns digital communication. Specifically, we treat the transport of bit streams from one geographical location to another over various physical media, such as wire pairs, coaxial cable, optical fiber, and radio. We also treat multiple-access channels, where there are potentially multiple transmitters and receivers sharing a common medium. Ten years have elapsed since the Second Edition, and there have been remarkable advances in wireless communication, including cellular telephony and wireless local-area networks. This Third Edition expands treatment of communication theories underlying wireless, and especially advanced techniques involving multiple antennas, which tum the traditional single-input single-output channel into a multiple-input multiple-output (MIMO) channel. This is more than a trivial advance, as it stimulates many advanced techniques such as adaptive antennas and coding techniques that take advantage of space as well as time. This is reflected in the addition of two new chapters, one on the theory of MIMO channels, and the other on diversity techniques for mitigating fading. The field of error-control coding has similarly undergone tremendous changes in the past decade, brought on by the invention of turbo codes in 1993 and the subsequent rediscovery of Gallager's low-density parity-check codes. Our treatment of error-control coding has been rewritten to reflect the current state of the art. Other materials have been reorganized and reworked, and three chapters from the previous edition have been moved to the book's Web site to make room.
More than just a biography or discography, this work is a thoroughly detailed guide to every known recording of the legendary British rock band The Who--their entire range, from their early hits of the 1960s through the ambitious concept works to their later successes. Many previously uncovered facts are incorporated into the text, and the author has been able to glean exclusive information from The Who's archives. Unrealized Who projects are discussed and analyzed for the first time in print. Finally, the work contains a discography of CDs and an exhaustive appendix of every known Who song.
The subject of many films and books, art theft is a fascinating topic that continues to capture the popular imagination. However, it is one of many types of art crime that remain under-researched and which require much more academic, empirical investigation. This book examines who is performing, managing, governing and controlling the securitization and policing of art theft in London. Through giving the first map of the policing and securitization of one of the world’s largest centres of art, it helps our understanding of art security at city, national and international levels and offers practical recommendations for those who operate within art security. Providing the first clear single account of the London art security terrain, this book also advances current knowledge of policing, environmental criminology and insurance. Moreover, it adds to the previous research into the traditionally restricted worlds of private policing, public policing and the art world.
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