Program of policy studies in science and technology: Readings in technology assessment
Articles are presented concerning the historical, theoretical, methodological, and institutional aspects of technology assessment.
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Biomedical technical transfer. Applications of NASA science and technology
Lower body negative pressure testing in cardiac patients has been completed as well as the design and construction of a new leg negative unit for evaluating heart patients. This technology is based on NASA research, using vacuum chambers to stress the cardiovascular system during space flight. Additional laboratory tests of an intracranial pressure transducer, have been conducted. Three new biomedical problems to which NASA technology is applicable are also identified. These are: a communication device for the speech impaired, the NASA development liquid-cooled garment, and miniature force transducers for heart research.
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Science and Technology of Low Speed and Motorless Flight. Third International Symposium
Low speed aerodynamics of sailplanes and hang gliders are discussed. Emphasis is placed on optimal flight techniques, structures and materials, and ultralight design.
Hanson, P. W.↗
Science and technology results from the OSS-1 Payload on the Space Shuttle
The OSS-1 Payload of nine experiments was carried on the STS-3 Space Shuttle flight in March of 1982. The OSS-1 Payload contained four instruments that evaluated specific aspects of the Orbiter's environment, including the levels of particulate, gaseous and electromagnetic emissions given off by the Orbiter, and the interactions between the Orbiter and the surrounding plasma. In addition to these environmental observations, these instruments performed scientific investigations in astronomy and in space plasma physics, including active experiments in electron beam propagation. Other experiments were in the areas of solar physics, plant growth, micrometeorite studies and the technology of actively controlled heat pipes. A description is given of the initial results from these experiments, with some implications of these results for future operation of space experiments from the Shuttle payload bay. One major result was the unexpected discovery of a faint surface-induced optical glow created near the Shuttle surfaces by impacts of ambient atmospheric atoms and molecules.
Chipman, E.↗
Large Deployable Reflector Science and Technology Workshop. Volume 2: Scientific Rationale and Technology Requirements
The scientific rationale for the large deployable reflector (LDR) and the overall technological requirements are discussed. The main scientific objectives include studies of the origins of planets, stars and galaxies, and of the ultimate fate of the universe. The envisioned studies require a telescope with a diameter of at least 20 m, diffraction-limited to wavelengths as short as 30-50 micron. In addition, light-bucket operation with 1 arcsec spatial resolution in the 2-4 microns wavelength region would be useful in studies of high-redshifted galaxies. Such a telescope would provide a large increase in spectroscopic sensitivity and spatial resolving power compared with existing or planned infrared telescopes.
Hollenbach, D.↗
Statement before the Committee on Science and Technology, US House of Representatives
The Small Business Innovation Development Act is addressed. Technological innovation, Federal research and development needs, and private sector communication are addressed.
Evans, S. J.↗
Spacelab-1: An early space station for science and technology
The scientific capabilities of the Spacelab manned pallet are reviewed, together with the implications of an expansion of the research effectiveness with a free-flying platform. The premier Spacelab flight will carry out earth observations with a metric camera and SAR, atmospheric studies will be performed with imaging spectrometers, and space plasma physics will be examined by injecting particle beams or VLF waves into the near-Shuttle environment. Radiance and spectrum data will be gathered of the sun and UV and X ray information will be recorded from the stars. Experimentation will also be carried out for on-board crystal growth, metallurgy, and glassy material production, as well as the response of biological systems to zero-g conditions and hard space radiation. The telemetry, time, crewmember participation, and on-board controls required for Spacelab operations are outlined. Missions for a space platform for studying the atmosphere/space interface are described.
Knott, K.↗
Large Deployable Reflector Science and Technology Workshop. Volume 3: Systems and Technology Assessment. Introduction
The Large Deployable Reflector (LDR), a proposed 20 m diameter telescope designed for infrared and submillimeter astronomical measurements from space, is discussed in terms of scientific purposes, capabilities, current status, and history of development. The LDR systems goals and functional/telescope requirements are enumerated.
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Large Deployable Reflector Science and Technology Workshop. Volume 3: Systems and Technology Assessment. Conclusions
The physical parameters of the Large Deployable Reflector (LDR) required to achieve the anticipated astronomical objectives are reviewed briefly. System parameters and performance requirements for the LDR are enumerated. The LDR was compared with the Cosmic Background Experiment (COBE), the Infrared Astronomical Satellite (IRAS), and the Space Infrared Telescope Facility (SIRTF). Angular resolution and high resolution spectroscopy requirements for LDR were considered.
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Progress in containerless science and technologies
One of the unique features of space which cannot be reproduced on earth is long duration zero gravity. Experiments that take the greatest advantage that space can offer are containerless processing experiments. This is precisely the reason why NASA has developed a variety of containerless processing technologies and facilities to allow the scientific community to perform experiments prior to and during Space Shuttle flights. This paper will briefly review recent progress in some of these technologies and facilities.
Wang, T. G.↗
Processing Science and Technology
The heat capacity at constant pressure,Cp, of poly-p-xylylene (PPX) was measured from 220 to 625 degrees K using differential scanning calorimetry. The heat capacities at constant volume, Cv, of both PPX and its isomer polystyrene (PS were interpreted using literature data on full normal mode calculations for PS and estimates from low molecular weight analogues for PPX for the 39 group vibrations. Nine skeletal vibrations were used with theta sub 1 and theta sub 3 temperatures of 534.5 degrees K and 43.1 degrees K for PS. It was also possible to calculate a heat capacity contribution of a phenylene group within a polymer chain. Single 48-vibration theta sub 1 temperatures of 3230 degrees K for PS and 2960 degrees K for PPX are sufficient to describe Cv above 220 degrees K. Below 140 deg K, PS heat capacity shows deviations from the Tarasov treatment.
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Vision science and technology for supervised intelligent space robots
The focus of recent work in robotic vision for application in intelligent space robots such as the Extravehicular Activity (EVA) Retriever is in visual function, that is, how information about the space world is derived and then conveyed to cognition. The goal of this work in visual function is first to understand how the relevant structure of the surrounding world is evidenced by regularities among the pixels of images, then to understand how these regularities are mapped on the premises that form the primitive elements of cognition, and then to apply these understandings with the elements of visual processing (algorithms) and visual mechanism (machine organization) to intelligent space robot simulations and test beds. Since visual perception is the process of recognizing regularities in images that are known on the basis of a model of the world to be reliable related to causal structure in the environment (because perception attaches meaning to the link between a conception of the environment and the objective environment), the work involves understanding generic, generally applicable models of world structure (not merely objects) and how that structure evidences itself in images.
Erickson, Jon D.↗
National Educators' Workshop: Update 1989 Standard Experiments in Engineering Materials Science and Technology
Presented here is a collection of experiments presented and demonstrated at the National Educators' Workshop: Update 89, held October 17 to 19, 1989 at the National Aeronautics and Space Administration, Hampton, Virginia. The experiments related to the nature and properties of engineering materials and provided information to assist in teaching about materials in the education community.
Gardner, James E.↗
National Educators' Workshop: Update 1988. Standard Experiments in Engineering Materials Science and Technology
Presented here is a collection of experiments presented and demonstrated at the National Educators' Workshop: Update 88, held May 10 to 12, 1988 at the National Institute of Standards and Technology (NIST), Gaithersberg, Maryland. The experiments related to the nature and properties of engineering materials and provided information to assist in teaching about materials in the education community.
Gardner, James E.↗
NASA and the United States educational system - Outreach programs in aeronautics, space science, and technology
The role of NASA in developing a well-educated American work force is addressed. NASA educational programs aimed at precollege students are examined, including the NASA Spacemobile, Urban Community Enrichment Program, and Summer High School Apprenticeship Program. NASA workshops and programs aimed at helping teachers develop classroom curriculum materials are described. Programs aimed at college and graduate-level students are considered along with coordination efforts with other federal agencies and with corporations.
Owens, Frank C.↗
Applications of ultrashort laser pulses in science and technology; Proceedings of the Meeting, The Hague, Netherlands, Mar. 12, 13, 1990
Topics discussed are on the generation of high-intensity femtosecond lasers, the high-repetition and infrared femtosecond pulses, and physics of semiconductors and applications. Papers are presented on the femtosecond pulse generation at 193 nm; the generation of intense subpicosecond and femtosecond pulses; intense tunable subpicosecond and femtosecond pulses in the visible and infrared, generated by optical parametric oscillators; a high-efficiency high-energy optical amplifier for femtosecond pulses; and the generation of solitons, periodic pulsing, and nonlinearities in GaAs. Other papers are on ultrafast relaxation dynamics of photoexcited carriers in GaAs, high-order optical nonlinear susceptibilities of transparent glasses, subnanosecond risetime high-power pulse generation using photoconductive bulk GaAs devices, femtosecond studies of plasma formation in crystalline and amorphous silicon, and subpicosecond dynamics of hot carrier relaxation in InP and GaAs.
Antonetti, Andre↗
The Solar Array Module Plasma Interactions Experiment (SAMPIE): Science and technology objectives
The Solar Array Module Plasma Interactions Experiment (SAMPIE) is an approved NASA Space Shuttle space flight experiment to be launched in Jul. 1993. The SAMPIE experiment is designed to investigate the interaction of high voltage space power systems with ionospheric plasma. To study the behavior of solar cells, a number of cell coupons, representing technologies of current interest, will be biased to high voltages to characterize both negative potential arcing and positive potential current collection. Additionally, various theories of arc suppression will be tested by including several specially modified cell coupons. Finally, SAMPIE will include experiments to study the basic nature of these interactions. The rationale for a space flight experiment, the measurements to be made, the significance of the expected results, and the current design status of the flight hardware are described.
Hillard, G. Barry↗
National Educators' Workshop: Update 1991. Standard Experiments in Engineering Materials Science and Technology
Given here is a collection of experiments presented and demonstrated at the National Educators' Workshop: Update 91, held at the Oak Ridge National Laboratory on November 12-14, 1991. The experiments related to the nature and properties of engineering materials and provided information to assist in teaching about materials in the education community.
Gardner, James E.↗