National aeronautics

Xem 1-18 trên 18 kết quả National aeronautics
  • Forty years ago, Congress asked the National Academies Committee on Science, Engineering, and Public Policy (COSEPUP)—the only joint policy committee of the National Academy of Sciences, National Academy of Engineering, and Institute of Medicine—to look at the relationship between basic research and national goals. That request, from the House Committee on Science and Astronautics in 1964, resulted in the report Basic Research and National Goals.

    pdf205p camchuong_1 04-12-2012 31 9   Download

  • The U.S. air transportation system is vital to the economic well-being and security of the United States. To support continued U.S. leadership in aviation, Congress and NASA requested that the National Research Council undertake a decadal survey of civil aeronautics research and technology (R&T) priorities that would help NASA fulfill its responsibility to preserve U.S. leadership in aeronautics technology. In 2006, the National Research Council published the Decadal Survey of Civil Aeronautics.

    pdf122p mnemosyne75 02-02-2013 15 2   Download

  • In mid-1999 representatives of the Chinese Academy of Engineering (CAE) visited the U.S. National Research Council (NRC) to explore the prospects for collaboration between the two institutions on a study of the future of the personal car in China. This is the second instance of formal collaboration between the CAE and the NRC. The outcome of the first was a study entitled Cooperation in the Energy Futures of China and the United States, published in 2001, in which the Chinese Academy of Sciences also participated....

    pdf281p loaken_1 15-11-2012 22 0   Download

  • The Deep Space Communications and Navigation Systems Center of Excellence (DESCANSO) was established in 1998 by the National Aeronautics and Space Administration (NASA) at the California Institute of Technology’s Jet Propulsion Laboratory (JPL). DESCANSO is chartered to harness and promote excellence and innovation to meet the communications and navigation needs of future deep-space exploration.

    pdf169p toad_prince9x 30-09-2011 57 18   Download

  • Dấu ngoặc vuông [ ] - square brackets • Dấu ngoặc vuông được dùng bao quanh những phần thông tin ở trong dấu ngoặc tròn. Ví dụ Brandi planned to work as an aeronautic engineer (she completed an internship at National Aeronautics and Space Administration [NASA]) as soon as she completed her doctoral work.

    pdf16p duyuyen1212 14-03-2011 37 6   Download

  • Physics in a New Era: An Overview is the culmination of the National Research Council survey series Physics in a New Era. The survey was proposed by the Board on Physics and Astronomy, continuing the tradition of periodic reviews of physics by the National Research Council. The overview is the final volume of the survey and was welcomed and supported by the Department of Energy, the National Science Foundation, and the National Aeronautics and Space Administration.

    pdf203p camnhung_1 13-12-2012 24 6   Download

  • But there is another potential impact for the environment and nature conservation which is a much more positive one. The 1999 structural fund regulations for the first time recognised that the funds could be used for the protection and improvement of the environment (emphasis added). This change in wording was extremely significant – for the first time the doors were open to local and regional authorities and national governments to start putting forward environmental and nature programme proposals which meet the European Union’s cohesion policy objectives set out in the Treaty.

    pdf222p yeutinh98 19-09-2012 27 5   Download

  • In August 1999, the Transportation Research Board (TRB) held a workshop at the request of the National Aeronautics and Space Administration (NASA) to examine its Small Aircraft Transportation System (SATS) concept.

    pdf135p mnemosyne75 02-02-2013 23 5   Download

  • Intensity of use of freshwater resources (both surface and groundwater) is expressed as gross abstractions per capita, as a percentage of total available renewable freshwater resources, including inflows from neighbouring countries (see below) and as a percentage of internal resources. It has to be noted that when measured at national level these indicators may hide significant variations at territorial level. Wastewater treatment connection rates show the percentage of the national population actually connected to public waste water treatment plants.

    pdf65p lulaula 25-10-2012 22 4   Download

  • This report was originally released in December 2004 in prepublication form as the first report of a two-phase study to be carried out by the same committee. The first phase was sponsored by the National Aeronautics and Space Administration (NASA) and focused on the Tropical Rainfall Measuring Mission (TRMM). The second phase was sponsored by the National Oceanic and Atmospheric Administration and focused on the Global Precipitation Measurement mission. The report of the second phase will be published in a separate volume in 2006.

    pdf116p camchuong_1 04-12-2012 22 3   Download

  • Advances in the capabilities of technologies applicable to distributed networking, telecommunications, multi-user computer applications, and interactive virtual reality are creating opportunities for users in the same or separate locations to engage in interdependent, cooperative activities using a common computer-based environment.

    pdf58p japet75 30-01-2013 17 3   Download

  • Just one example suffices here to corroborate our approach of cautious optimism with regard to the immediate future of the media in the Arab world. Our study confirmed that even though the region’s print media had to go through significant structural changes in these trying times, it has weathered the storm much better than other markets, with the overall daily circulation and the number of titles continuing to rise. The new media laws that came into being in several countries have helped this growth considerably.

    pdf775p nhacsihuytuan 13-04-2013 18 3   Download

  • The last edition of the report came out soon after the onset of the global financial crisis, leaving out little scope for incorporating a detailed analysis of its impact on the media industry. We have tried to more than compensate for that in the present edition, providing a much more focused assessment of the media industry against the backdrop of the financial meltdown. The impact of the crisis, needless to say, varies from country to country, depending on the extent to which each market is exposed to global markets.

    pdf791p nhacsihuytuan 13-04-2013 14 3   Download

  • In response to a request from the National Aeronautics and Space Administration (NASA), the National Research Council (NRC) established the Committee on Principal-Investigator-Led Missions in the Space Sciences in the summer of 2004 to conduct a study of Principal-Investigator (PI)-led missions in the space sciences. (Appendix A includes brief biographies of the committee members and staff.

    pdf133p tom_123 14-11-2012 23 2   Download

  • Preface This is the second National Council on Radiation Protection and Measurements (NCRP) report that provides radiation protection guidance for astronauts working in low-earth orbit. The guidance in this Report supercedes the radiation exposure limit recommendations provided in NCRP Report No. 98 that was published in 1989. Readers may find some of the radiobiological information in Report No. 98 to continue to be relevant and of interest and, therefore, Report No. 98 will continue to be available from NCRP Publications.

    pdf218p camchuong_1 04-12-2012 13 2   Download

  • The National Aeronautics and Space Administration asked the Board on Science, Technology, and Economic Policy (STEP) to hold a one-day symposium to review the NASA Ames Research Center’s plans to develop a science and technology park.

    pdf165p mnemosyne75 02-02-2013 24 2   Download

  • In 1985, perchlorate contamination was discovered at Superfund sites in California; however, the extent of perchlorate contamination of water sources nationwide was not revealed until 1997. Today, over 11 million people have perchlorate in their public drinking-water supplies at concentrations of 4 ppb (4 :g/L) or higher.

    pdf0p crius75 07-01-2013 20 1   Download

  • Main technical issues to be resolved before greater implementation of aluminum alloys in ship structures include weld quality since these alloys are more difficult to weld relative to steel and that shipyards typically have limited experience in these alloys. In terms of mechanical properties, aluminum alloys generally exhibit lower fatigue strength when compared to steel. As-welded fatigue properties can be as low as 6 to 7 ksi (Czyryca et al 2006).

    pdf24p quynho77 13-11-2012 14 0   Download

CHỦ ĐỀ BẠN MUỐN TÌM

Đồng bộ tài khoản