task group (163 risultati)

Condizione: Very Good. *Price HAS BEEN REDUCED by 10% until Monday, Sept. 15 (sale item)* 143 pp., Paperback, very good. - If you are reading this, this item is actually (physically) in our stock and ready for shipment once ordered. We are not bookjackers. Buyer is responsible for any additional duties, taxes, or fees required by recipient's country.

Condizione: Good. Former library book; may include library markings. Used book that is in clean, average condition without any missing pages.

Condizione: New.

Soft cover. Condizione: Good. Softcovers; ex-corporate library; foxing spots on covers; light creasing of corners of wraps and several leaves; o/w in good condition. Book.

Condizione: New. SUPER FAST SHIPPING.

Condizione: Good. Good condition. A copy that has been read but remains intact. May contain markings such as bookplates, stamps, limited notes and highlighting, or a few light stains.

Soft cover. Condizione: Good. Softcovers; ex-corporate library; light staining/foxing of covers; light foxing of endpages and edges, o/w contents in good condition. Book.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

Condizione: New. SUPER FAST SHIPPING.

Trade Paperback Original. Condizione: Very Good+. First Edition. viii, [2], 115 p. [aro vlve ud lyon].

Condizione: New.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

Soft cover. Condizione: Good. ORIGINAL PUBLICATION; Softcover; ex-library; light foxing of inside covers, endpages and edges; o/w in good condition. Book.

Soft cover. Condizione: Good. ORIGINAL PUBLICATION; Softcover; ex-library; light foxing of inside covers, endpages and edges; o/w in good condition. Book.

Octavo, paperbound (stapled off-white wrappers), 71 pp. Near-Fine. Florida, Floridiana, Florida History, Americana, U.S-iana, Pinellas County, St. Petersburg, Clearwater, Dunedin, Gulfport. bslic.

Condizione: New.

Trade Paperback Original. Condizione: Good+. First Edition. Volume has some wear; binding has light soil; tight, text clean. ix, [1], 47 p. [aro vlve ud lyon].

Hardcover. Condizione: Near Fine. No Jacket. Hardcover, 324 pp., b/w photos, charts, diagrams, tables. City of Austin, Texas stamp on front paste-down endpaper, otherwise minimal wear, clean text, tight binding.

Softcover. Condizione: As New. No Jacket. First Edition. Like New / Fine condition. The covers look great with only a hint of shelf wear. The binding is tight. The interior pages are clean and unmarked. USPS electronic tracking number issued free of charge.

Hardcover. Condizione: Very Good. Condizione sovraccoperta: No Dust Jacket. Ex-library copy with usual library marks, else very good and clean. In library binding. ; 8vo; 386 pages.

Wraps. Condizione: Good. Presumed First Edition, First printing. The format is approximately 8.25 inches by 10.75 inches. xii, 75, [1] pages. Illustrated front cover. Some red ink marks noted. Figures. Tables. References. This is one of the National Academies Compass Series. Astronauts who venture beyond the protection of Earth's atmosphere and magnetosphere risk exposure to levels of radiation far exceeding those on Earth. Of all the risks, this one is probably the most straightforward to controlâ"by providing adequate shielding. However, because shielding adds weight, cost, and complexity to space vehicles, it is very important for designers to have a good, quantitative understanding of the risk and its degree of certainty. This report assesses our understanding of radiation hazards in space. It also considers the additional research needed to reduce the areas of uncertainty, research that must be completed prior to undertaking the detailed design of a vehicle carrying crew members into space for periods of extended exposure. The report finds that it will take more than a decade of research to answer even the narrowest set of key questions. The nation has backed away from a specific timetable for human exploration of the moon and Mars. Yet it seems plausible that such expeditions will be mounted sometime in the first quarter of the 21st century, especially given the recent resurgence of interest in possible life on Mars from the study of meteorites. It becomes clear, when the lengthy time scale of the research is also taken into account, that the present report is indeed timely and should receive prompt consideration by NASA planners. NASA's long-range plans include possible human exploratory missions to the moon and Mars within the next quarter century. Such missions beyond low Earth orbit will expose crews to transient radiation from solar particle events as well as continuous high-energy galactic cosmic rays ranging from energetic protons with low mean linear energy transfer (LET) to nuclei with high atomic numbers, high energies, and high LET. Because the radiation levels in space are high and the missions long, adequate shielding is needed to minimize the deleterious health effects of exposure to radiation. The knowledge base needed to design shielding involves two sets of factors, each with quantitative uncertaintyâ"the radiation spectra and doses present behind different types of shielding, and the effects of the doses on relevant biological systems. It is only prudent to design shielding that will protect the crew of spacecraft exposed to predicted high, but uncertain, levels of radiation and biological effects. Because of the uncertainties regarding the degree and type of radiation protection needed, a requirement for shielding to protect against large deleterious, but uncertain, biological effects may be imposed, which in turn could result in an unacceptable cost to a mission. It therefore is of interest to reduce these uncertainties in biological effects and shielding requirements for reasons of mission feasibility, safety, and cost.

Card Cover. Condizione: Very Good (Contents Fine). No Jacket. This is the FIRST EDITION. This book is part of a large purchase from a Public Sector Library and except where mentioned are for the most part LIKE NEW! MOSTLY the ONLY flaws are the blacked out (they insisted) Library stamps which show many of them to be UNUSED! This copy is Very Good (Contents Fine). FEEL FREE TO E-MAIL FOR PHOTOGRAPHS AND FURTHER DETAILS. FROM A DEALER WHO TELLS YOU WHO THEY ARE AND WHAT THEIR TELEPHONE AND ADDRESS CONTACT DETAILS ARE! Size: 4to - over 9¾" - 12" tall. EX PUBLIC SECTOR LIBRARY BLACK.

paperback. Condizione: Good. Connecting readers with great books since 1972! Used textbooks may not include companion materials such as access codes, etc. May have some wear or writing/highlighting. We ship orders daily and Customer Service is our top priority!