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  • 1
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    Surface deformation due to inflation of an arbitrarily oriented triaxial ellipsoidal cavity in an elastic half-space, with reference to Kilauea volcano, Hawaii (1986)
    In:  J. Geophys. Res., London, Army Corps of Engineers, Woodward-Clyde Consultants, vol. 91, no. B12, pp. 7429-7438, pp. 1013, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 1986
    Keywords: Elasticity theory of dislocations ; Dislocation ; Volcanology ; Crustal deformation (cf. Earthquake precursor: deformation or strain) ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    The evolution of seismic barriers and asperities caused by the depressuring of fault planes in oil and gas fields of south Texas (1986)
    In:  Bull. Seism. Soc. Am., Basle, Wiley, vol. 76, no. 17, pp. 939-948, pp. L17307, (ISSN: 1340-4202)
    Details
    Publication Date: 1986
    Keywords: Earthquake precursor: prediction research ; Earthquake barriers ; Induced seismicity ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Deformation due to a rectangular tension crack in an elastic half-space (1986)
    In:  Bull. Seism. Soc. Am., Sendai, Icelandic Meteorological Office, Ministry for the Environment, University of Iceland, vol. 76, no. 5, pp. 865-881, pp. 1066, (ISSN: 1340-4202)
    Details
    Publication Date: 1986
    Keywords: Dislocation ; Elasticity theory of dislocations ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
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    The effects of bone on proton NMR relaxation times of surrounding liquids (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: Preliminary attempts by our group at UCSF to assess fat content of vertebral marrow in the lumbar spine using relaxation time information demonstrated that the presence of trabecular bone affects relaxation times. The objective of this work was a thorough study of the effects of bone on NMR relaxation characteristics of surrounding liquids. Trabecular bone from autopsy specimens was ground up and sifted into a series of powders with graded densities ranging from 0.3 gm/cc to 0.8 gm/cc. Each powder was placed first in n-saline and then in cottonseed oil. With spectroscopy, spin-lattice relaxation times (T1) and effective spin-spin relaxation times (T2*) were measured for each liquid in each bone powder. As bone density and surface to volume ratio increased, T1 decreased faster for saline than for oil. T2* decreased significantly for both water and oil as the surface to volume ratio increased. It was concluded that effects of water on T1 could be explained by a surface interaction at the bone/liquid interface, which restricted rotational and translational motion of nearby molecules. The T1s of oil were not affected since oil molecules are nonpolar, do not participate in significant intermolecular hydrogen bonding, and therefore would not be expected to interact strongly with the bone surface. Effects on T2* could be explained by local magnetic field inhomogeneities created by discontinuous magnetic susceptibility near the bone surface. These preliminary results suggest that water in contact with trabecular bone in vivo will exhibit shortened relaxation times.
    Keywords: Life Sciences (General)
    Type: Investigative radiology (ISSN 0020-9996); Volume 21; 6; 472-7
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Planetary astronomy (1986)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: Comets were studied during their relatively quiescent phases at large distances from the sun. This program, has resulted in a variety of CCD images of comets in several visible and near-IR bands selected to sample the continuum, rather than emission features. The most extensive dataset was obtained for P/Halley during January 1985 (plus scattered earlier data), near the time the comet turned on. The data were reduced in a preliminary fashion. Other comets predicted to be relatively inactive (including Neujmin 1 and Arend-Rigaux) were most active than expected. P/Gehrels 3 was also observed.
    Keywords: ASTRONOMY
    Type: NASA, Washington Reports of Planetary Astronomy, 1985; p 82-84
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    The Critical Role of Computational Fluid Dynamics in Rotary-Wing Aerodynamics (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-23
    Description: Helicopter rotor aerodynamics is basically the study of unsteady aerodynamic flows in a rotating and translating coordinate system. Current trends in this field are briefly reviewed by examining recent advances in lifting-surface theory, wake modeling, panel methods, and finite-difference models' Examples are used to illustrate selected current methods and some indications of promising future directions are highlighted.
    Keywords: Aerodynamics
    Type: Vertica (ISSN 0360-5450); Volume 11; Nos. 1, 2; 43-63
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    CNO abundances of some field horizontal-branch and Population I A stars (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: From observations of infrared lines, oxygen and nitrogen abundances of the prototype field horizontal-branch stars HD 109995 and HD 161817, the somewhat similar star HD 64488, and the sharp-lined Population I A stars Theta Leo and HR 6559 have been obtained, as well as carbon abundances of HD 161817 and Theta Leo. The results for HD 161817 may be in accord with the predictions of Sweigart and Mengel (1979) for dredge-up during the previous red-giant stage if the non-LTE effects for the O I lines have been properly accounted for, and those for the C I and N I lines are small. This star and HD 109995 are apparently both oxygen and nitrogen poor to the same degree although their iron abundances differ by 0.3 dex.
    Keywords: ASTROPHYSICS
    Type: Astronomical Society of the Pacific, Publications (ISSN 0004-6280); 98; 783-787
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Space motion sickness (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Space motion sickness clinical characteristics, time course, prediction of susceptibility, and effectiveness of countermeasures were evaluated. Although there is wide individual variability, there appear to be typical patterns of symptom development. The duration of symptoms ranges from several hours to four days with the majority of individuals being symptom free by the end of third day. The etiology of this malady remains uncertain but evidence points to reinterpretation of otolith inputs as being a key factor in the response of the neurovestibular system. Prediction of susceptibility and severity remains unsatisfactory. Countermeasures tried include medications, preflight adaptation, and autogenic feedback training. No countermeasure is entirely successful in eliminating or alleviating symptoms.
    Keywords: AEROSPACE MEDICINE
    Type: ESA Proceedings of 2nd International Conference on Space Physiology; p 137-142
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Advanced solar thermal technologies for the 21st century (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The paper considers the present status of solar thermal dynamic space power technologies and projects the various attributes of these systems into the future, to the years 2000 and 2010. By the year 2000, collector weights should decrease from 1.25 kg/sq m (1985 value) to about 1.0 kg/sq m. The specific weight is also expected to decrease from 6.0 kg/kw. By the year 2010, slight improvements in the free piston Stirling energy conversion system are postulated with efficiencies reaching 32 percent. In addition, advanced concentrator concepts should be operational.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Real-time optical associative retrieval technique (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A real-time optical associative retrieval technique is presented. The associative retrieval model enables a large amount of data to be stored and recalled by partial information optically in real time. The real-time capability is achieved by using an electronically addressed spatial light modulator based on the pocket-size liquid crystal display television. The potential application of the technique to the perceptive vision requirements in telerobotics for achieving NASA's goals of automation in space is described.
    Keywords: COMPUTER OPERATIONS AND HARDWARE
    Type: Optical Engineering (ISSN 0091-3286); 25; 853-856
    Format: text
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    NASA TECHNICAL REPORTS
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