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BONT, DE, Raf,Livre Rare Book

Van literaire avant-garde tot raswetenschap. Gustaaf Schamelhout (1869-1944).

National Academy of Sciences, National Research Council, Division of Engineering, Panel 9 of the Summer Study on Space ApplicatiBiblio.com

Useful Applications of Earth-Oriented Satellites; Point-to-Point Communications

196920356Washington DC: National Academy of Sciences 1969. Presumed First Edition First printing. Wraps. Good. 23 cm. ix 1 172 pages. Wraps. Illustrations. Diagrams. Appendices. Lower corner of several pages and lower corner of rear cover bent/creased. This was produced for the National Aeronautics and Space Administration. In the fall of 1966 the National Aeronautics and Space Administration asked the National Academy of Sciences to conduct a study on "the probable future usefulness of satellites in practical Earth-oriented applications." This study would obtain the recommendations of highly qualified scientists and engineers on the nature and scope of the research and development program needed to provide the technology required to exploit this applications. NASA subsequently asked that the study include an analysis of cost-benefit relationships. Designed "The Summer Study on Space Applications" work began in January 1967 guided by a Central Review Committee CRC appointed by the academy. Technical panels were convened to study practical space applications and worked intensively during the summers of 1967 and 1968. The work of each of the 13 panels was then reported to the CEC with produced an overall report. The Panel on Point-to-Point communications compiled an interim report during the summer of 1967. This final report was prepared under the direction of Dr. Samuel Lutz. The major part of the Study was accomplished by the panels; the function of the CRC was to review their work to evaluate their findings and in the context of the total national picture to derive certain conclusions and recommendations. The Committee was impressed by the quality of the panels' work and asked that the panel reports be made available to specialized audiences. Among the areas where Panel 9 made recommendations were: Fixed-Reflector Movable-Beam antenna Retrodirective Array Ionic Thrusters Radio Interferomenter Low-Noise Amplifier Launch Vehicles Shared Bands Spectrum Allocations Shielding Earth Stations and Space to Space links. In telecommunications a point-to-point connection refers to a communications connection between two communication endpoints or nodes. An example is a telephone call in which one telephone is connected with one other and what is said by one caller can only be heard by the other. This is contrasted with a point-to-multipoint or broadcast connection in which many nodes can receive information transmitted by one node. Other examples of point-to-point communications links are leased lines and microwave radio relay. Point-to-point is sometimes abbreviated as P2P. National Academy of Sciences paperback

Ground Zero Books · États-Unis175,00 $US≈ 148,07 €

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