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An Investigation Of Conformable Antennas For The Astronaut Backpack Communication System
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722938895 Total Pages :190 pages Book Rating :4.9/5 (388 download)
Book Synopsis An Investigation of Conformable Antennas for the Astronaut Backpack Communication System by : National Aeronautics and Space Administration (NASA)
Download or read book An Investigation of Conformable Antennas for the Astronaut Backpack Communication System written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: During periods of extravehicular activity it is obviously important that communication and telemetry systems continue to function independently of the astronaut. A system of antennas must therefore be designed that will provide the necessary isotropic coverage using circular polarization over both the transmit and receive frequency bands. To avoid the inherent physical limitations to motion that would be incurred with any sort of protruding antenna, it is necessary that the radiator be essentially flush-mounted or conformable to the structure on which it is attached. Several individual antenna elements are needed for the desired coverage. Both the particular elements chosen and their location determine the ultimate radiation pattern of the overall system. For these reasons a two-fold research plan was undertaken. First, individual elements were investigated and designed. Then various mounting locations were considered and the radiation patterns were predicted taking into account the effects of the astronaut's backpack. Long, Stuart A. and Jackson, David R. and Williams, Jeffery T. and Wilton, Donald R. Unspecified Center ASTRONAUTS; EXTRAVEHICULAR ACTIVITY; PORTABLE EQUIPMENT; RADIO COMMUNICATION; ANTENNA RADIATION PATTERNS; CIRCULAR POLARIZATION; ISOTROPY; TELEMETRY...
Book Synopsis An Investigation of Conformable Antennas for the Astronaut Backpack Communication System by : Stuart A. Long
Download or read book An Investigation of Conformable Antennas for the Astronaut Backpack Communication System written by Stuart A. Long and published by . This book was released on 1988 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technology for Large Space Systems by :
Download or read book Technology for Large Space Systems written by and published by . This book was released on 1989 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1988 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Space Station Systems written by and published by . This book was released on 1986 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. National Aeronautics and Space Administration. Scientific and Technical Information Division Publisher : ISBN 13 : Total Pages :192 pages Book Rating :4.:/5 (317 download)
Book Synopsis Technology for Large Space Systems: A Bibliography with Indexes (supplement 20) by : United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Download or read book Technology for Large Space Systems: A Bibliography with Indexes (supplement 20) written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Division and published by . This book was released on 1989 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of Services for Family Planning and Infertility, United States, 1982 by : Gerry E. Hendershot
Download or read book Use of Services for Family Planning and Infertility, United States, 1982 written by Gerry E. Hendershot and published by . This book was released on 1988 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1982 statistics on the use of family planning and infertility services presented in this report are preliminary results from Cycle III of the National Survey of Family Growth (NSFG), conducted by the National Center for Health Statistics. Data were collected through personal interviews with a multistage area probability sample of 7969 women aged 15-44. A detailed series of questions was asked to obtain relatively complete estimates of the extent and type of family planning services received. Statistics on family planning services are limited to women who were able to conceive 3 years before the interview date. Overall, 79% of currently mrried nonsterile women reported using some type of family planning service during the previous 3 years. There were no statistically significant differences between white (79%), black (75%) or Hispanic (77%) wives, or between the 2 income groups. The 1982 survey questions were more comprehensive than those of earlier cycles of the survey. The annual rate of visits for family planning services in 1982 was 1077 visits /1000 women. Teenagers had the highest annual visit rate (1581/1000) of any age group for all sources of family planning services combined. Visit rates declined sharply with age from 1447 at ages 15-24 to 479 at ages 35-44. Similar declines with age also were found in the visit rates for white and black women separately. Nevertheless, the annual visit rate for black women (1334/1000) was significantly higher than that for white women (1033). The highest overall visit rate was for black women 15-19 years of age (1867/1000). Nearly 2/3 of all family planning visits were to private medical sources. Teenagers of all races had higher family planning service visit rates to clinics than to private medical sources, as did black women age 15-24. White women age 20 and older had higher visit rates to private medical services than to clinics. Never married women had higher visit rates to clinics than currently or formerly married women. Data were also collected in 1982 on use of medical services for infertility by women who had difficulty in conceiving or carrying a pregnancy to term. About 1 million ever married women had 1 or more infertility visits in the 12 months before the interview. During the 3 years before interview, about 1.9 million women had infertility visits. For all ever married women, as well as for white and black women separately, infertility services were more likely to be secured from private medical sources than from clinics. The survey design, reliability of the estimates and the terms used are explained in the technical notes.
Download or read book NASA SP. written by and published by . This book was released on 1962 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Space Station Systems written by and published by . This book was released on 1989 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1988 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1988-10 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index: Keyword A-L by :
Download or read book Government Reports Annual Index: Keyword A-L written by and published by . This book was released on 1988 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Theory of Almost Everything by : Robert Oerter
Download or read book The Theory of Almost Everything written by Robert Oerter and published by Penguin. This book was released on 2006-09-26 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are two scientific theories that, taken together, explain the entire universe. The first, which describes the force of gravity, is widely known: Einstein’s General Theory of Relativity. But the theory that explains everything else—the Standard Model of Elementary Particles—is virtually unknown among the general public. In The Theory of Almost Everything, Robert Oerter shows how what were once thought to be separate forces of nature were combined into a single theory by some of the most brilliant minds of the twentieth century. Rich with accessible analogies and lucid prose, The Theory of Almost Everything celebrates a heretofore unsung achievement in human knowledge—and reveals the sublime structure that underlies the world as we know it.
Book Synopsis Handbook of Smart Textiles by : Xiaoming Tao
Download or read book Handbook of Smart Textiles written by Xiaoming Tao and published by Springer. This book was released on 2015-10-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The “Handbook of Smart Textiles” aims to provide a comprehensive overview in the field of smart textile describing the state of the art in the research sector as well as the well-established techniques applied in industries. The handbook is planned to cover from fundamental theories, experimental techniques, characterization methods, as well as real applications with successful commercialized examples. The book is structured in a way in which it is appropriate for graduate students, PhD candidates, and professionals in diverse scientific and engineering communities devoted to relevant fields, including textile engineering, chemistry, bioengineering, material engineering, mechanical engineering, electrical engineering. The book will also provide a solid reference for industrial players who look for innovative technologies as well as environmental, safety concerns for the development of smart textile related products.
Book Synopsis Microwave Tomography by : Sima Noghanian
Download or read book Microwave Tomography written by Sima Noghanian and published by Springer. This book was released on 2014-07-08 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a detailed overview on the use of global optimization and parallel computing in microwave tomography techniques. The book focuses on techniques that are based on global optimization and electromagnetic numerical methods. The authors provide parallelization techniques on homogeneous and heterogeneous computing architectures on high performance and general purpose futuristic computers. The book also discusses the multi-level optimization technique, hybrid genetic algorithm and its application in breast cancer imaging.
Book Synopsis Roget's 21st Century Thesaurus in Dictionary Form by : Barbara Ann Kipfer
Download or read book Roget's 21st Century Thesaurus in Dictionary Form written by Barbara Ann Kipfer and published by Laurel. This book was released on 1993 with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combining scholarly authority with a new awareness of today's communication demands, "Roget's 21st Century Thesaurus" is the simple, reliable way to find the perfect word for your needs. It features as easy-to-use dictionary format plus a revolutionary concept index that arranges words by idea, thus enhancing the user's process of association, and leading scores of additional selections. The inclusion of a wide spectrum of words and phrases with each entry -- from sophisticated choices to completely new vocabulary in the language -- brings the user an exceptional number of alternatives to fit any variation of style and tone. Created by a leading expert in linguists and lexicography with today's communication needs in mind. More word choices than any other thesaurus -- Over 1 million words! Concise definitions for each main entry. A revolutionary concept index -- arranged by idea, it mirrors the way we actually think! No obsolete terms -- all synonyms reflect modern usage.
Download or read book Spinoff 2006 written by and published by Office of Aerospace Technology. This book was released on 2006-11 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Features beneficial NASA-derived technologies now utilized in the commercial and public sector.
