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This alphabetical reference covers the entire spectrum of the recording of sound, from Edison's experimental cylinders to contemporary high technology. The major focus is on the recorded sound industry in the US, with additional material on Canada, Europe, Australia, and New Zealand. The coverage is particularly strong on the earliest periods of recorded sound history--1877-1948, the 78 rpm era and 1949-1982, the LP era. In addition to performers and their work, entries also cover important commercial organizations, individuals who made significant technical contributions, societies and associations, sound archives and libraries, magazines, catalogs, award winners, technical topics, special and foreign terms, copyright laws, and other areas of interest. Annotation copyright by Book News, Inc., Portland, OR
Clear and accessible introduction to the concept of time examines measurement, historic timekeeping methods, uses of time information, role of time in science and technology, and much more. Over 300 illustrations.
Recently, there has been a lot of interest in provably "good" pseudo-random number generators [lo, 4, 14, 31. These cryptographically secure generators are "good" in the sense that they pass all probabilistic polynomial time statistical tests. However, despite these nice properties, the secure generators known so far suffer from the han- cap of being inefiicient; the most efiicient of these take n2 steps (one modular multip- cation, n being the length of the seed) to generate one bit. Pseudc-random number g- erators that are currently used in practice output n bits per multiplication (n2 steps). An important open problem was to output even two bits on each multiplication in a cryptographically secure way. This problem was stated by Blum, Blum & Shub [3] in the context of their z2 mod N generator. They further ask: how many bits can be o- put per multiplication, maintaining cryptographic security? In this paper we state a simple condition, the XOR-Condition and show that any generator satisfying this condition can output logn bits on each multiplication. We show that the XOR-Condition is satisfied by the lop least significant bits of the z2-mod N generator. The security of the z2 mod N generator was based on Quadratic Residu- ity [3]. This generator is an example of a Trapdoor Generator [13], and its trapdoor properties have been used in protocol design. We strengthen the security of this gene- tor by proving it as hard as factoring.
This volume covers advances in atomic frequency standards (atomic clocks) from the last several decades. It explains the use of techniques, such as laser optical pumping, coherent population trapping, laser cooling, and electromagnetic and optical trapping, in the implementation of classical microwave and optical atomic frequency standards. The authors describe the basic physics behind the operation of atomic clocks, explore new frequency standards that provide better stability and accuracy than conventional standards, and illustrate the application of atomic clocks in various areas.
The four years between 1941 and 1945 were years in which the nation raised and trained an air armada and committed it to operations on a scale unknown to that time. With Courage: The U.S. Army Air Forces in World War II retells the story of sacrifice, valor, and achievements in air campaigns against tough determined adversaries. It describes the development of a uniquely American doctrine for the application of air power against an opponent's key industries and centers of national life, a doctrine whose legacy today is the Global Reach - Global Power strategic planning framework of the modern U.S. Air Force. The narrative integrates aspects of strategic intelligence, logistics, technology, and leadership to offer a full yet concise account of the contributions of American air power to victory in that war.
An international community of researchers is now flourishing in the area of cryptology-there was none half-a-dozen years ago. The intrinsic fascination of the field certainly is part of the explanation. Another factor may be that many sense the importance and potential consequences of this work, as we move into the information age. I believe that the various meetings devoted to cryptology over the past few years have contributed quite significantly to the formation of this community, by allowing those in the field to get to know each other and by providing for rapid exchange of ideas. CRYPTO 83 was once again truly the cryptologic event of the year. Many of the most active participants continue to attend each year, and attendance continues to grow at a healthy rate. The informal and collegial atmosphere and the beach side setting which contribute to the popularity of the event were again supported by flawless weather. The absence of parallel sessions seemed to provide a welcome opportunity to keep abreast of developments in the various areas of activity. Each session of the meeting organized by the program committee is repre sented by a section in the present volume. The papers were accepted by the program committee based on abstracts, and appear here without having been otherwise refereed. The last section contains papers presented at the informal rump session. A keyword index and an author index to the papers is provided at the end of the volume.