4.112 Ergebnisse
1950Scripta Mathematica: Vol. XVI, No.4. Paperback in very good condition. Slight creases to upper leading corners of covers and internal pages, light wear to leading edge of initial page and to spine ends. Internal contents clean and unmarked. AD Used
1950Scripta Mathematica: Vol. XVI, No.3. Paperback in very good condition. Light creases to lower leading corners throughout and also to spine. Contents clean and unmarked, binding sound. AD Used
1949Scripta Mathematica: Vol. XV, No.2. Paperback in very good condition. Creases to lower leading corners of covers and internal pages. Faint marks to front cover. Contents clean, binding sound. AD Used
1949Scripta Mathematica: Vol. XV, No.1. Paperback in very good condition. Creases to front cover and rear cover corners, minor wear to cover edges and spine. Internally clean and unmarked. AD Used
1948Scripta Mathematica: Vol. XIV, Nos. 3-4. Paperback in very good condition. Creases to spine and to front cover, faint mark to front and chipping to spine ends. Light foxing to page block. Binding is slightly loose from covers. Contents are clean and unmarked. AD Used
1939Scripta Mathematica: Vol. VI, No.2. Paperback in very good condition. Light tanning of cover edges and spine, minor crease to front lower leading corner, small tear to leading edge of first page and faint pen mark to rear cover. Contents clean and binding sound. AD Used
2002Best.-Nr. 1339658PN. New. 2002. Soft Cover. Date is original print. This is a reprint edition . PN paperback
Best.-Nr. 2080202103701745Chuo Keishosha N.A. Soft Cover. Fine. Page size: 4 3 354 39p Size: 22cm A5 Chuo Keishosha paperback
1999Best.-Nr. 91332Washington DC: United States General Accounting Office 1999. Presumed First Edition First Printing. Wraps. Very good. 28 pages. Footnotes. This is a "Report to the Chairman Subcommittee on Defense Committee on Appropriations House of Representatives". Satellite control systems are used to ensure that satellites reach their planned orbits and perform their intended missions while in orbit. There are two types of satellite control operations-platform control and payload control. Platform controls involves monitoring the health and status and managing the operations of a satellite's physical structure sometimes called the bus. Payload controls involves monitoring the health and status and managing the operations of a satellite's mission equipment. Specific satellite control functions consist of 1 locating satellites and receiving and processing data from them 2 following satellites' motion over time and 3 transmitting signals to satellites. These three functions are called telemetry tracking and commanding and are performed by a network of ground command and control centers ground antennas and communication capabilities between the centers antennas and satellites. There are two types of satellite control networks-common and dedicated. DOD operates two common networks that provide primary or backup control for communications environmental monitoring navigation and intelligence satellites. Examples include the Defense Satellite Communications System Defense Meteorological Satellite Program and Global Positioning System. DOD also operates several dedicated networks that control missile warning communications and intelligence missions. DOD has made minimal progress in integrating and improving its satellite control capabilities in accordance with 1996 national space policy. In 1992 DOD identified a need for an integrated satellite control system to achieve standardization and interoperability across military services and individual satellite programs. In 1995 the Air Force which controls most of DOD's satellites characterized its satellite control capabilities as aging inefficient and costly to operate. The Air Force initiated an effort to standardize these capabilities and achieve full implementation in 2003-a first step toward an integrated and interoperable DOD capability. Air Force officials chose to proceed with a conceptual design over operational alternatives. However in 1997 the Air Force terminated this effort because of schedule delays resulting from software development problems and the additional amount of software that needed to be written. Air Force Space Command representatives are now recommending that the use of the Air Force's existing satellite control capabilities be extended to 2005 to provide time to acquire an improved capability. Until then the Air Force will be unable to reduce approximately $400 million it spends annually to operate maintain sustain and modernize satellite control capabilities. The Navy's satellite control capabilities are not as old inefficient or costly to operate as the Air Force's capabilities. Although the Navy upgraded its capabilities in the early 1990s another upgrade is planned because the company that provided the existing capabilities no longer provides software support services. DOD has taken limited action to foster integrated and interoperable satellite control for all government space activities since it was directed to do so by the 1996 national space policy. Prior studies recommended that a high-level interagency management group be established to oversee implementation of integrated systems across agency lines. Although DOD established a senior steering group in 1998 to address national security space management and integration issues government space agencies continue to plan for satellite control capabilities on an independent basis rather than coordinate and integrate their efforts on an interagency basis. Considering the long-standing need to replace the Air Force's aging and costly satellite control capabilities and the Navy's more recent plan to upgrade its capabilities DOD has an opportunity to revitalize its effort to achieve integrated satellite control by acquiring a standardized capability. A resumed search for such a capability is appropriate because it would also provide an opportunity to review Air Force satellite control decisions for future space-based infrared and communication satellite programs that are currently in development. Commercial off-the-shelf products that could perform core functions for controlling satellites are available and several studies have advocated the use of such products. In making a selection among alternatives DOD could reduce acquisition risk by employing best commercial practices-a key element of DOD's acquisition reform initiatives. Commercial firms place a premium on demonstrated performance before making critical decisions rather than on predicted performance as was the case with the Air Force's 1995 selection. We are recommending that the Secretary of Defense take actions to revitalize efforts to 1 integrate and improve DOD's satellite control capabilities using commercial products and practices and 2 foster integration and interoperability of satellite control among government space activities. United States General Accounting Office paperback
1980Best.-Nr. 760682PN. New. 1980. Soft Cover. Date is original print. This is a reprint edition. . PN paperback
1981Hardcover (no jacket) in good condition. Statistics: Textbooks and monographs, volume 37. Light marks and edgewear to the boards and spine. Stamps on the endpapers and lightly marked page block. Pages are clean; all content is clear. CM Used
1960Hardcover without dust jacket. Faint marks to front board and to page block. Contents clean and unmarked. AD Used
2010Best.-Nr. 040152Heinle 2010. Eighth Edition . CD-ROM. Like New. This new audio program correlates to the audio sections included in the Student Activities Manual.Complete 5 CD set in flexible notebook. Eighth Edition. Full refund if not satisfied. Heinle unknown
ISBN : 2703400888. DELMAS J. ET CIE. 1976. In-4 Carré. Broché. Bon état. Couv. convenable. Dos satisfaisant. Intérieur frais. Environ 100 pages . COLLECTION FRANCAISE / 3e EDITION.
Best.-Nr. 95067Paris, Masson 1987, 220x155mm, XIV - 200pages, broché. Bel exemplaire.
2012Best.-Nr. 500113911Studyrama 2012 143 pages 12 6x1 2x19cm. 2012. Broché. 143 pages.
1957Best.-Nr. RO20063738DURASSIE et Cie. 1957. In-12. Broché. Etat d'usage, Couv. légèrement passée, Dos satisfaisant, Intérieur bon état. Environ 10/12 pages.. . . . Classification Dewey : 657-Comptabilité
1992Best.-Nr. 257008PN. New. 1992. Soft Cover. Date is original print. This is a reprint edition . PN paperback
1991Best.-Nr. 242616PN. New. 1991. Soft Cover. Date is original print. This is a reprint edition . PN paperback
1997Best.-Nr. 296318PN. New. 1997. Soft Cover. Date is original print. This is a reprint edition . PN paperback
1921204 p. Hardcover Good condition
1990Best.-Nr. 233514PN. New. 1990. Soft Cover. Date is original print. This is a reprint edition . PN paperback
1993Best.-Nr. 266335PN. New. 1993. Soft Cover. Date is original print. This is a reprint edition . PN paperback
1984Paperback in good condition. Proceedings of a conference organized by the Mathematical Society of the GDR in Schwerin, Germany, 29th May to 4th June 1983. Covers and page block are marked. Leading corners, edges and spine are bumped, worn and creased, slightly affecting pages within. Pages are clean and contents are clear throughout. Binding is sound. HCW Used
1992Best.-Nr. 257025PN. New. 1992. Soft Cover. Date is original print. This is a reprint edition . PN paperback
