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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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All sourcesNASA NTRSDOE OSTI
NASA NTRS1984

Techniques for the study of gravity waves and turbulence (keynote paper), part 4

Probably one of the most important achievements mesosphere stratosphere troposphere (MST) radars can make toward increasing the understanding of the dynamics of the atmosphere is to determine the exact relationship between the generation of turbulence and the sources of high shear or convectively unstable flows. An important theoretical tool, the gravity-wave breaking through which one can begin to understand spontaneous generation of turbulence model is discussed. In this model, large amplitude gravity waves produce local regions where the Richardson number (N sup 2/U sub Z sup 2) is less than 1/4 thus giving rise to turbulent flows. Thus the appearance of turbulent layers can often be interpreted as a breaking-gravity-wave signature. Even though the techniques for studying gravity waves and turbulence may be quite different (and historically have resulted in somewhat separate bodies of literature), it is clear from the wave-breaking model that the phenomena are intimately linked. The techniques for measurements of gravity wave flow fields and turbulent regions by MST radar should show cognizance of some of the theoretical questions raised by the wave-breaking model.

Schoeberl, M. R.↗
NASA NTRS1985

Criteria for site selection and frequency allocation (keynote paper), part 5

Technical aspects of mesosphere-stratosphere-troposphere (MST) Radar on site and frequency selection were discussed. Recommendations on site selections are presented. Tests of interference will be conducted before selecting a site. A small directional antenna may be suitable to simulate sidelobe sensitivity of radars however, sophisticated data-processing methods make system sensitivity extremely good. The use of the complete data system to look for interference is recommended. There is the difficulty of allocation of frequencies -- almost continuous use by these radars will be made when the band 40 to 60 MHz is allocated to other services.

Rottger, J.↗
NASA NTRS1984

Overview of on-line data processing for MST radars (keynote paper), part 7

The most important aspects of the processing of MST radar data are discussed. The important points of on-line data processing for MST radar are reviewed. The goals of the on-line and now almost exclusively digital processing, procedures are to achieve good altitude resolution and coverage, good frequency (Doppler shift) resolution, and good time resolution, while avoiding, the problems of range and frequency ambiguity (aliasing), ground clutter, and interference. Achieving optimum results requires pulse compression and some coherent integration. The first allows full utilization of the average power capability of the transmitter and the second reduces the computing requirements.

Farley, D. T.↗
NASA NTRS1984

Data base management: MSTRAC (keynote paper), part 8

Technical Aspects of MST radars were discussed. The name of the group is MST Radar Coordination (MSTRAC). The geophysical parameters to be included in the sample data tapes were determined. It was suggested that MSTRAC compile a catalog of existing data at each of the facilities. It is found that: (1) there is a community of interested users for MST data; (2) the initial responses from observatories indicates that interest in MSTRAC is not overwhelming, probably because of time involved; and (3) the program needs reassessment.

Avery, S. K.↗
NASA NTRS1989

A strategy for Mars: The case for Mars III - Keynote address

Plans for defining a Mars mission and developing the technologies needed for a Mars mission are discussed. The information about Mars obtained from the Viking mission is reviewed. The establishment of a lunar base and the role of such a base in a manned mission to Mars are examined. The problems of a long-term mission in microgravity, the possible development of artificial gravity, the Mars Sample Return mission, and various scenarios for a manned mission to Mars are considered.

Fletcher, James C.↗
NASA NTRS1990

Space sciences - Keynote address

The present status and projected future developments of the NASA Space Science and Applications Program are addressed. Emphasis is given to biochemistry experiments that are planned for the Space Station. Projects for the late 1990s which will study the sun, the earth's magnetosphere, and the geosphere are briefly discussed.

Alexander, Joseph K.↗
NASA NTRS1985

Keynote address

Explore the source record for details and available documents.

Hodge, John D.↗
NASA NTRS1990

Keynote address: The past, present, and future of atomic time

The early history of atomic time and frequency standards is reviewed. The most accurate and stable present standards are described. Prospective future improvements are discussed, particularly those with laser cooling and with trapped ions and atoms.

Ramsey, Norman F.↗
NASA NTRS1992

Ninth Annual NASA/Contractors Conference on Quality and Productivity. World Class Excellence: The Journey Continues. Keynote presentations

This coference provided an excellent forum for the members of the NASA community to share their experience and expertise in an effort to continuously improve the quality of the US space program. The topics covered include the following: NASA's approach to continual improvement; commitment to total quality; total quality at AlliedSignal Aerospace; organizational TQM; recognition of the 1992 Low Trophy Finalists; announcement of the 1992 Low Trophy Recipients; and the changing face of aerospace contracting.

Templeton, Geoffrey B.↗
NASA NTRS1991

The Space Exploration Initiative: a challenge to advanced life support technologies: keynote presentation

President Bush has enunciated an unparalleled, open-ended commitment to human exploration of space called the Space Exploration Initiative (SEI). At the heart of the SEI is permanent human presence beyond Earth orbit, which implies a new emphasis on life science research and life support system technology. Proposed bioregenerative systems for planetary surface bases will require carefully designed waste processing elements whose development will lead to streamlined and efficient and efficient systems for applications on Earth.

Ecological Systems, Closed↗
NASA NTRS2009

Keynote Address for 6th International Symposium on Digital Earth

NASA is committed to collaborating with not only our National Partners but also with our International Partners to help make our world a better place. We do this through the sharing of our discoveries and working together so that we can address uncertainties in predictions and forecasts that impact how we live on our home planet. NASA is committed to a Digital Earth as it enables our research to focus on cross disciplinary analysis. The mainstream Information Technologies along with the Digital Earth concepts have allowed this interdisciplinary research that is so critical to societal benefits. The technologies have been discovered and in many cases implemented, but we must forge ahead together to continue to advance all that is possible to fully extend our earth observations for the sake of humankind.

Bambacus, Myra↗
NASA NTRS2015

NASA Keynote at the 2015 Trilateral SMA Conference, Frascati, Italy

The purpose of this presentation is to illustrate some new directions within NASA's safety and mission function in response to changes in missions, technology, and practices. The presentation lists last year's highlights from NASA's human and robotic spaceflight missions, and discusses anticipated highlights for the coming year taken from existing Agency presentations. It will highlight changes to NASA's mission and the way NASA does business, as described in the 2014 strategic plan. It will then discuss how these changes pose challenges to trusted SMA practices, and provide some examples of initiatives NASA is taking action to address these challenges.

Safety Mission Assurance↗
NASA NTRSDate not supplied

Arm DevSummit Keynote: Environment for Data Engineering in Virtual Reality: Ethical Considerations

Currently, the US Government is going through a large-scale data Transformation effort, where the GSA playbook is guiding all agencies to make their processes data-driven with the help of emerging technologies. To address concerns about algorithm sharing, AI adoption, and vendor lock-in, the NASA Langley Research Center Digital Transformation Group has developed the Environment for Data Engineering in Virtual Reality (EnDEVR), a data science ecosystem that allows users to command and investigate customizable data analyses from a VR environment. The system has been evaluated in the Oculus Rift S and Quest environments, two popular VR systems powered by the ARM architecture. Current and future development will employ several AI capabilities to guide research and automation within the environment and to facilitate algorithm sharing. In this talk, we will discuss the results of an initial ethical investigation and recommended considerations for the use of AI within the system.

Artificial Intelligence↗