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Author: Rural Electrification Administration Publisher: Forgotten Books ISBN: 9780265946848 Category : Technology & Engineering Languages : en Pages : 172
Book Description
Excerpt from Telecommunications Engineering and Construction Manual, Vol. 6: August 1962 Wire Loads: Chart l'is included to give vertical wire load information for use in judging whether a particular pole top unit is strong enough to support the load. The chart shows the vertical loads for wires in the heavy, medium, and light storm loading districts. The data are for spans where the poles are of the same height and on level ground. It is assumed in this case that a pole supports the load of a half span in each direction from it, in tangent construction. Where one pole supports its load at a higher level than the two adjacent poles, it will be supporting the load of more than the two half spans in each direction from it; and some assumption of load increase may be advisable if the difference in pole height is great. Where the poles are in a line going up a long grade, the load per pole will be about the same on each pole and equal to the load on one span if the spans are nearly equal. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Rural Electrification Administration Publisher: Forgotten Books ISBN: 9780265946848 Category : Technology & Engineering Languages : en Pages : 172
Book Description
Excerpt from Telecommunications Engineering and Construction Manual, Vol. 6: August 1962 Wire Loads: Chart l'is included to give vertical wire load information for use in judging whether a particular pole top unit is strong enough to support the load. The chart shows the vertical loads for wires in the heavy, medium, and light storm loading districts. The data are for spans where the poles are of the same height and on level ground. It is assumed in this case that a pole supports the load of a half span in each direction from it, in tangent construction. Where one pole supports its load at a higher level than the two adjacent poles, it will be supporting the load of more than the two half spans in each direction from it; and some assumption of load increase may be advisable if the difference in pole height is great. Where the poles are in a line going up a long grade, the load per pole will be about the same on each pole and equal to the load on one span if the spans are nearly equal. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Roger L. Freeman Publisher: Wiley-Interscience ISBN: Category : Technology & Engineering Languages : en Pages : 1900
Book Description
Contains a compendium of the most frequently used data in day-to-day telecommunications engineering work: tables, graphs, figures, formulae, nomograms, performance curves, standards highlights, constants and statistics. Designed for easy and rapid access. Comprehensive reference for designing, building, purchasing, using or maintaining all kinds of telecommunications systems. Central source of information on transmission, switching, traffic engineering, numbering, signaling, noise, modulation and forward error correction.
Author: Joseph H. Yuen Publisher: Springer Science & Business Media ISBN: 1475749236 Category : Technology & Engineering Languages : en Pages : 615
Book Description
The challenge of communication in planetary exploration has been unusual. The guidance and control of spacecraft depend on reliable communication. Scientific data returned to earth are irreplaceable, or replaceable only at the cost of another mission. In deep space, communications propagation is good, relative to terrestrial communications, and there is an opportunity to press toward the mathematical limit of microwave communication. Yet the limits must be approached warily, with reliability as well as channel capacity in mind. Further, the effects of small changes in the earth's atmosphere and the interplanetary plasma have small but important effects on propagation time and hence on the measurement of distance. Advances are almost incredible. Communication capability measured in 18 bits per second at a given range rose by a factor of 10 in the 19 years from Explorer I of 1958 to Voyager of 1977. This improvement was attained through ingenious design based on the sort of penetrating analysis set forth in this book by engineers who took part in a highly detailed and amazingly successful pro gram. Careful observation and analysis have told us much about limitations on the accurate measurement of distance. It is not easy to get busy people to tell others clearly and in detail how they have solved important problems. Joseph H. Yuen and the other contribu tors to this book are to be commended for the time and care they have devoted to explicating one vital aspect of a great adventure of mankind.
Author: Publisher: ISBN: Category : Information superhighway Languages : en Pages : 184
Book Description
Communication and information technologies can reduce the barriers of distance and space that disadvantage rural areas. This report defines a set of distinct voice, computer, and video telecommunication services; describes several rural information applications that make use of these services; and surveys various wireline and wireless systems and technologies that are being used or that might be used to deliver these services to rural areas. Rural information applications such as distance learning require a wide range of telecommunication services, but no current system or technology is capable of delivering all services to all areas. This report concludes that there are many technologies suitable for providing voice telecommunication services in rural areas. It is also technically feasible to provide advanced computer networking and video capabilities to even relatively small towns in rural areas. However, no available technology could economically provide these broadband capabilities to the most isolated farms, ranches, and homes. New wireless technology would be needed to accomplish this. Government regulations and policies will also play an essential role in the development of the Rural Information Infrastructure. Different regulations and policies will likely be required in rural areas than in urban areas. Contains 66 references. Appendices list acronyms and abbreviations and describe measurements of rural spectrum usage in the 108-MHz to 19.7-GHz frequency range, conducted at Eureka, California. (Author/SV).
Author: Rural Electrification Administration
Author: Rural Electrification Administration
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Author: 
Author: United States. Army Strategic Communications Command
Author: Roger L. Freeman
Author: Roger L. Freeman
Author: Joseph H. Yuen
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Author: United States. Department of the Interior
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