Space environment

Xem 1-20 trên 115 kết quả Space environment
  • The Space Handbook, first published in 1958, was designed to serve as a basic guide on the uses and characteristics of space systems, including astronautics and its applications, technology in the space environment, rocket vehicles, propulsion systems, propellants, internal power sources, structures and materials

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  • From the interior of the Sun, to the upper atmosphere and near-space environment of Earth, and outward to a region far beyond Pluto where the Sun’s influence wanes, advances during the past decade in space physics and solar physics—the disciplines NASA refers to as heliophysics—have yielded spectacular insights into the phenomena that affect our home in space. This report, from the National Research Council’s (NRC’s) Committee for a Decadal Strategy in Solar and Space Physics, is the second NRC decadal survey in heliophysics.

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  • In response to requests from Congress, NASA asked the National Research Council to undertake a decadal survey of life and physical sciences in microgravity. Developed in consultation with members of the life and physical sciences communities, the guiding principle for the study is to set an agenda for research for the next decade that will allow the use of the space environment to solve complex problems in life and physical sciences so as to deliver both new knowledge and practical benefits for humankind as we become a spacefaring people.

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  • Dust is a ubiquitous feature of the cosmos, impinging directly or indirectly on most fields of modern astronomy. Dust grains composed of small (submicronsized) solid particles pervade interstellar space in the Milky Way and other galaxies: they occur in a wide variety of astrophysical environments, ranging from comets to giant molecular clouds, from circumstellar shells to galactic nuclei. The study of this phenomenon is a highly active and topical area of current research.

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  • In 2003, the National Research Council (NRC) published the first decadal strategy for solar and space physics: The Sun to the Earth—and Beyond: A Decadal Research Strategy in Solar and Space Physics.1 That report included a recommended suite of NASA missions that were ordered by priority, presented in an appropriate sequence, and selected to fit within the expected resource profile for the next decade.

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  • 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.

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  • Many youth in the United States have fully integrated the Internet into their daily lives. For them, the Internet is a positive and powerful space for socializing, learning, and engaging in public life. Along with the positive aspects of Internet use come risks to safety, including the dangers of sexual solicitation, online harassment, and bullying, and exposure to problematic and illegal content.

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  • Tham khảo sách 'space research content and coordination of space science and technology', kỹ thuật - công nghệ, kĩ thuật viễn thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf31p nt18101 30-04-2013 22 3   Download

  • What can you measure and what are your limits when orbiting in space? Learn about what physical quantities you can measure and what types of sensors you can buy or build. We cover the 5 essential design limits as well: power, bandwidth, resolution, computing... and legal limitations. Explore what you can play with using your own personal satellite.

    pdf120p ringphone 07-05-2013 25 3   Download

  • Since 1997, RAND has studied options for configuring an Agile Combat Support (ACS) system that would enable the achievement of Air and Space Expeditionary Force (AEF) goals. Operation Iraqi Freedom (OIF) offered an opportunity to examine the implementation of new ACS concepts in a wartime environment. In 2000,

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  • Since 1997, RAND has studied options for configuring a future Agile Combat Support (ACS) system that would enable Air and Space Expeditionary Force (AEF) goals to be achieved. Operation Enduring Freedom (OEF), in Afghanistan, offered an opportunity to examine the implementation of new ACS concepts in a contingency environment. In 2000, Project AIR FORCE helped evaluate combat support lessons from Joint Task Force Noble

    pdf0p anhnangmuahe2013 06-03-2013 13 1   Download

  • Tham khảo sách 'u s civilian space policy priorities', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf30p nt18102 23-05-2013 14 1   Download

  • Until about a century ago, the deep-ocean floor was completely inaccessible, hidden beneath waters averaging over 3,600 meters deep. Totally without light and subjected to intense pressures hundreds of times greater than at the Earth's surface, the deep-ocean bottom is a hostile environment to humans, in some ways as forbidding and remote as the void of outer space.

    pdf244p doan137 07-05-2010 333 227   Download

  • You are the network administrator for Testking.com. The TestKing network contains seven application servers. Each application server runs a database application named TestKingApp. Requirements for TestKingApp state that when you add a new user, you must add the user to the server that has the most available disk space.

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  • Understanding the Linux Kernel helps readers understand how Linux performs best and how it meets the challenge of different environments. The authors introduce each topic by explaining its importance, and show how kernel operations relate to the utilities that are familiar to Unix programmers and users.

    pdf0p doimetv 20-01-2011 81 20   Download

  • Landscapes of a New Cultural Economy of Space is the fifth volume of the series. Focusing on the transformations and changes in human life that influence landscape development, the book presents ‘landscape’ as the interface of human-environment interrelationships where the different processes of change are perceived and expressed. Theano Terkenli and Anne-Marie d’Hauteserre use this approach as a way to introduce a collection of contemporary discussions in landscape research and geography which look specifically at the cultural transformation and representation of landscapes.

    pdf257p namde02 08-03-2013 40 13   Download

  • You know you're getting old when it takes you a day to configure software...especially when bright−eyed kids half your age accomplish the same thing in two hours flat. This was the thought that crossed my mind when I recently decided to set up my machine for JSP (Java Server Pages) development. I got myself set up, made sure there was plenty of space available on my hard drive, and went to work downloading the software off the Web. And I spent the next ten hours wading through acres and acres of incomprehensible detail while trying to get Apache, mod_jserv and Tomcat to talk nice to...

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  • File Concept Access Methods Directory Structure File-System Mounting File Sharing Protection To explain the function of file systems To describe the interfaces to file systems To discuss file-system design tradeoffs, including access methods, file sharing, file locking, and directory structures To explore file-system protection .

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  • File-System Structure File-System Implementation Directory Implementation Allocation Methods Free-Space Management Efficiency and Performance Recovery Log-Structured File Systems NFS Example: WAFL File System To describe the details of implementing local file systems and directory structures To describe the implementation of remote file systems To discuss block allocation and free-block algorithms and trade-offs File-System Structure File structure Logical storage unit Collection of related information File system resides on secondary storage (disks) File system organized into...

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  • Difficulty in addressing contamination in low permeability soils may be alleviated to some degree by controlled pneumatic or hydraulic fracturing of the soil. However, engineered hydraulic fractures generally cannot be spaced more closely than about 5 feet, which means that chemical oxidants must still penetrate a substantial thickness of low permeability soil to come into contact with the contamination. Deep soil mixing with large diameter drill augers is the most effective method currently available to increase contact between adsorbed contaminants and the oxidants.

    pdf408p cao_can 29-12-2012 28 11   Download

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