21,434 research outputs found
Conceptual design for the Space Station Freedom fluid physics/dynamics facility
A study team at NASA's Lewis Research Center has been working on a definition study and conceptual design for a fluid physics and dynamics science facility that will be located in the Space Station Freedom's baseline U.S. Laboratory module. This modular, user-friendly facility, called the Fluid Physics/Dynamics Facility, will be available for use by industry, academic, and government research communities in the late 1990's. The Facility will support research experiments dealing with the study of fluid physics and dynamics phenomena. Because of the lack of gravity-induced convection, research into the mechanisms of fluids in the absence of gravity will help to provide a better understanding of the fundamentals of fluid processes. This document has been prepared as a final version of the handout for reviewers at the Fluid Physics/Dynamics Facility Assessment Workshop held at Lewis on January 24 and 25, 1990. It covers the background, current status, and future activities of the Lewis Project Study Team effort. It is a revised and updated version of a document entitled 'Status Report on the Conceptual Design for the Space Station Fluid Physics/Dynamics Facility', dated January 1990
Applications of aerospace technology in the public interest: Pollution measurement
This study of selected NASA contributions to the improvement of pollution measurement examines the pervasiveness and complexity of the economic, political, and social issues in the environmental field; provides a perspective on the relationship between the conduct of aerospace R and D and specific improvements in on site air pollution monitoring equipment now in use; describes the basic relationship between the development of satellite-based monitoring systems and their influence on long-term progress in improving environmental quality; and comments on how both instrumentation and satellite remote sensing are contributing to an improved environment. Examples of specific gains that have been made in applying aerospace R and D to environmental problem-solving are included
Index to 1981 NASA Tech Briefs, volume 6, numbers 1-4
Short announcements of new technology derived from the R&D activities of NASA are presented. These briefs emphasize information considered likely to be transferrable across industrial, regional, or disciplinary lines and are issued to encourage commercial application. This index for 1981 Tech Briefs contains abstracts and four indexes: subject, personal author, originating center, and Tech Brief Number. The following areas are covered: electronic components and circuits, electronic systems, physical sciences, materials, life sciences, mechanics, machinery, fabrication technology, and mathematics and information sciences
Index to 1984 NASA Tech Briefs, volume 9, numbers 1-4
Short announcements of new technology derived from the R&D activities of NASA are presented. These briefs emphasize information considered likely to be transferrable across industrial, regional, or disciplinary lines and are issued to encourage commercial application. This index for 1984 Tech B Briefs contains abstracts and four indexes: subject, personal author, originating center, and Tech Brief Number. The following areas are covered: electronic components and circuits, electronic systems, physical sciences, materials, life sciences, mechanics, machinery, fabrication technology, and mathematics and information sciences
Aeronautical engineering: A continuing bibliography with indexes, supplement 100
This bibliography lists 295 reports, articles, and other documents introduced into the NASA Scientific and Technical Information System in August 1978
Methods of Technical Prognostics Applicable to Embedded Systems
HlavnĂ cĂlem dizertace je poskytnutĂ ucelenĂŠho pohledu na problematiku technickĂŠ prognostiky, kterĂĄ nachĂĄzĂ uplatnÄnĂ v tzv. prediktivnĂ ĂşdrĹžbÄ zaloĹženĂŠ na trvalĂŠm monitorovĂĄnĂ zaĹĂzenĂ a odhadu ĂşrovnÄ degradace systĂŠmu Äi jeho zbĂ˝vajĂcĂ Ĺživotnosti a to zejmĂŠna v oblasti komplexnĂch zaĹĂzenĂ a strojĹŻ. V souÄasnosti je technickĂĄ diagnostika pomÄrnÄ dobĹe zmapovanĂĄ a reĂĄlnÄ nasazenĂĄ na rozdĂl od technickĂŠ prognostiky, kterĂĄ je stĂĄle rozvĂjejĂcĂm se oborem, kterĂ˝ ovĹĄem postrĂĄdĂĄ vÄtĹĄĂ mnoĹžstvĂ reĂĄlnĂ˝ch aplikaci a navĂc ne vĹĄechny metody jsou dostateÄnÄ pĹesnĂŠ a aplikovatelnĂŠ pro embedded systĂŠmy. DizertaÄnĂ prĂĄce pĹinĂĄĹĄĂ pĹehled zĂĄkladnĂch metod pouĹžitelnĂ˝ch pro ĂşÄely predikce zbĂ˝vajĂcĂ uĹžitnĂŠ Ĺživotnosti, jsou zde popsĂĄny metriky pomocĂ, kterĂ˝ch je moĹžnĂŠ jednotlivĂŠ pĹĂstupy porovnĂĄvat aĹĽ uĹž z pohledu pĹesnosti, ale takĂŠ i z pohledu vĂ˝poÄetnĂ nĂĄroÄnosti. Jedno z dizertaÄnĂch jader tvoĹĂ doporuÄenĂ a postup pro vĂ˝bÄr vhodnĂŠ prognostickĂŠ metody s ohledem na prognostickĂĄ kritĂŠria. DalĹĄĂm dizertaÄnĂm jĂĄdrem je pĹedstavenĂ tzv. ÄĂĄsticovĂŠho filtrovanĂ (particle filtering) vhodnĂŠ pro model-based prognostiku s ovÄĹenĂm jejich implementace a porovnĂĄnĂm. HlavnĂ dizertaÄnĂ jĂĄdro reprezentuje pĹĂpadovou studii pro velmi aktuĂĄlnĂ tĂŠma prognostiky Li-Ion baterii s ohledem na trvalĂŠ monitorovĂĄnĂ. PĹĂpadovĂĄ studie demonstruje proces prognostiky zaloĹženĂŠ na modelu a srovnĂĄvĂĄ moĹžnĂŠ pĹĂstupy jednak pro odhad doby pĹed vybitĂm baterie, ale takĂŠ sleduje moĹžnĂŠ vlivy na degradaci baterie. SouÄĂĄstĂ prĂĄce je zĂĄkladnĂ ovÄĹenĂ modelu Li-Ion baterie a nĂĄvrh prognostickĂŠho procesu.The main aim of the thesis is to provide a comprehensive overview of technical prognosis, which is applied in the condition based maintenance, based on continuous device monitoring and remaining useful life estimation, especially in the field of complex equipment and machinery. Nowadays technical prognosis is still evolving discipline with limited number of real applications and is not so well developed as technical diagnostics, which is fairly well mapped and deployed in real systems. Thesis provides an overview of basic methods applicable for prediction of remaining useful life, metrics, which can help to compare the different approaches both in terms of accuracy and in terms of computational/deployment cost. One of the research cores consists of recommendations and guide for selecting the appropriate forecasting method with regard to the prognostic criteria. Second thesis research core provides description and applicability of particle filtering framework suitable for model-based forecasting. Verification of their implementation and comparison is provided. The main research topic of the thesis provides a case study for a very actual Li-Ion battery health monitoring and prognostics with respect to continuous monitoring. The case study demonstrates the prognostic process based on the model and compares the possible approaches for estimating both the runtime and capacity fade. Proposed methodology is verified on real measured data.
Analytical techniques and instrumentation: A compilation
Technical information is presented covering the areas of: (1) analytical instrumentation useful in the analysis of physical phenomena; (2) analytical techniques used to determine the performance of materials; and (3) systems and component analyses for design and quality control
The NASA SBIR product catalog
The purpose of this catalog is to assist small business firms in making the community aware of products emerging from their efforts in the Small Business Innovation Research (SBIR) program. It contains descriptions of some products that have advanced into Phase 3 and others that are identified as prospective products. Both lists of products in this catalog are based on information supplied by NASA SBIR contractors in responding to an invitation to be represented in this document. Generally, all products suggested by the small firms were included in order to meet the goals of information exchange for SBIR results. Of the 444 SBIR contractors NASA queried, 137 provided information on 219 products. The catalog presents the product information in the technology areas listed in the table of contents. Within each area, the products are listed in alphabetical order by product name and are given identifying numbers. Also included is an alphabetical listing of the companies that have products described. This listing cross-references the product list and provides information on the business activity of each firm. In addition, there are three indexes: one a list of firms by states, one that lists the products according to NASA Centers that managed the SBIR projects, and one that lists the products by the relevant Technical Topics utilized in NASA's annual program solicitation under which each SBIR project was selected
Aeronautical Engineering: A special bibliography with indexes, supplement 54
This bibliography lists 316 reports, articles, and other documents introduced into the NASA scientific and technical information system in January 1975
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