NASA Tech Briefs, February 1992

Topics covered include: New Product Development; Electronic Components and Circuits; Electronic Systems; Physical Sciences; Materials; Computer Programs; Mechanics; Machinery; Fabrication Technology; Mathematics and Information Sciences; Life Sciences

Feasibility study for a numerical aerodynamic simulation facility. Volume 1

A Numerical Aerodynamic Simulation Facility (NASF) was designed for the simulation of fluid flow around three-dimensional bodies, both in wind tunnel environments and in free space. The application of numerical simulation to this field of endeavor promised to yield economies in aerodynamic and aircraft body designs. A model for a NASF/FMP (Flow Model Processor) ensemble using a possible approach to meeting NASF goals is presented. The computer hardware and software are presented, along with the entire design and performance analysis and evaluation

A distributed control microprocessor system

Imperial Users onl

Perancangan Dan Pembuatan Perangkat Lunak Historical System Di Linux

Historical file merupakan teknik untuk mencatat sejarah perubahan yang pernah terjadi khususnya pada regular file. Aplikasi dari versioning mencakup backup dan disa<;ter recovery, juga digunakan untuk memonitor aktifitas penyusup (intruder). File system yang didukung dan yang berjalan di Lima tidak menyediakan model file versioning yang betjalan secara transparan dan mudah untuk digunakan. Dalam Tugas Akhir ini dibuat historical file .~ystem yang mendukung file versioning. Historical file system bekerja di alas file .!lystem yang sudah didukung oleh Linu.x. Salah satunya ada/ah Ext2 dan Reiserfs. File system ini menyediakan konfigurasi historical file bagi user berupa policy penyimpanan. Beberapa kumpu/an utility pada level user disediakan untuk men-selling arribut historical ini dan juga memanipu/asi file-file versi yang terbentuk. Aplikasi yang dibuat di Tugas Akhir ini diimplementasikan dengan menggunakan pendekatan yang hampir sama dengan teknik stackable file system, yailu teknik injeksi fimgsi VFS milik native file system. Desain ini menyebabkan file system banl dapat bekerja diatas file system yang sudah ada. Dari hasil uji coba yang telah dilakukan, menunjukkan historical file system yang didesain menggunakan teknik injeksi VFS, sebagai alternatif teknik stackable file system. dapat berjalan di atas native file 5ystem yang didukung Linu.r:. Begitu juga dengan utility pada level user untuk memanipulasi file versi, dapat berja/an dengan baik

Legal deposit of digital publications

Legal deposit is an obligation to deposit publications with specified depositories. The purpose of legal deposit is to preserve and provide long-term access to the national intellectual heritage. Extending legal deposit to digital publications presents many challenges for the framing of legislation, selection and acquisition of material, preservation and provision of access. The aim of this research was to: explore the potential issues related to the extension of UK legal deposit to digital publications and identify the implications for existing legal deposit arrangements. The research was based on Soft Systems Methodology. Data was gathered through two rounds of interviews with stakeholder groups, including legal deposit libraries, publishers, government and technical experts. Preservation is accepted as the main purpose of legal deposit, but there is some tension and lack of trust between publishers and legal deposit libraries on access to legal deposit collections. The new UK legal deposit law is enabling only; implementation will require further regulations that will be subject to detailed consultation and negotiation. While there has been a voluntary scheme in place for some time in the UK, the research found a lack of readiness amongst the UK legal deposit libraries. They still had to develop cooperative arrangements between themselves and publishers; policies, procedures, especially for online publications; and did not have all the necessary technical infrastructure in place. The deposit of digital publications is an extra role for legal deposit libraries and it is not clear that they will receive extra funding, as is the case in some other countries. There is currently no full-scale fully functional digital legal deposit system in the world. However, there are lessons to be learned from other legal deposit libraries and research and development work is providing partial solutions. The key issues are the need for communication and collaboration between UK legal deposit libraries and cooperation and trust between legal deposit libraries and publishers. Developments since the research was carried out demonstrate some progress in this. Without these, digital legal deposit cannot be successfully implemented in the UK. There is also a need to look at what the users require in terms to material collected and how it is preserved

Design of a coordinated plant control system for a marine nuclear propulsion plant

Thesis (Nucl. E.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering; and, (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1981.MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE.Vita.Includes bibliographical references.by Guillermo Baltra Aedo.M.S.Nucl.E

The 26th Annual Precise Time and Time Interval (PTTI) Applications and Planning Meeting

This document is a compilation of technical papers presented at the 26th Annual PTTI Applications and Planning Meeting. Papers are in the following categories: (1) Recent developments in rubidium, cesium, and hydrogen-based frequency standards, and in cryogenic and trapped-ion technology; (2) International and transnational applications of Precise Time and Time Interval technology with emphasis on satellite laser tracking, GLONASS timing, intercomparison of national time scales and international telecommunications; (3) Applications of Precise Time and Time Interval technology to the telecommunications, power distribution, platform positioning, and geophysical survey industries; (4) Applications of PTTI technology to evolving military communications and navigation systems; and (5) Dissemination of precise time and frequency by means of GPS, GLONASS, MILSTAR, LORAN, and synchronous communications satellites

Historical Study of the Appeals of Dismissed or Nonrenewed Tenured Teachers in Oklahoma: 1967-1992

Educational Administratio

Justification for Class III Permit Modification March 2006, SWMU 5, Operable Unit 1307, L WDS Drainfield at Technical Area V

This technical document contains the Justification for the Class III Permit Modification request for Site 5. Contained within this document is the history of the site, descriptions of any investigations and/or remediation completed at the site, the regulatory background, and the rationale for the proposed future land-use of these sites