Zobrazeno 1 - 10 of 10 pro vyhledávání: '"J. R. JACK"'
1
Trace element contents of mantle-derived magmas through time
Autor: Barnes, S. J. (Stephen J.), Williams, M. (Morgan), Smithies, R. H. (R. Hugh), Hanski, E. (Eero), Lowrey, J. R. (Jack R.)
A large compilation of quality-curated major and trace element data has been assembled to investigate how trace element patterns of mafic and ultramafic magmas have varied with time through particular settings from the Archean to the Phanerozoic, the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2423::7be7ee430753dea6f6b865f3ae404c9e
http://urn.fi/urn:nbn:fi-fe2021121360260
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2
Experimental measurements of thermal radiation properties by cyclic incident radiation
Autor: J. R. Jack, E. W. Spisz
Publikováno v: Applied optics. 7(11)
A new experimental technique is developed to determine simultaneously the total hemispherical emittance, solar absorptance, and absorptance-emittance ratio for metals at cryogenic temperatures. The method compares the temperature response of thin met
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1177f0c46334a9bf20077d488ad95ff3
https://pubmed.ncbi.nlm.nih.gov/20068979
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3
Technique for measuring absorptance and emittance by using cyclic incident radiation
Autor: J. R. Jack
Publikováno v: AIAA Journal. 5:1603-1606
Cyclic radiation technique has been developed for determining absorptance and emittance of metal surfaces. Using this technique both absorptance and emittance can be determined from one set of data, and variable and controlled temperature levels are
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca30ce3033f94f9a7387e6fe64f4070f
https://doi.org/10.2514/3.4257
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5
Theoretical Performance of Propellants Suitable for Electrothermal Jet Engines
Autor: J. R. Jack
Publikováno v: ARS Journal. 31:1685-1689
The performance of eight possible propellants for electrothermal jet engines is evaluated theoretically. Performance characteristics are presented for enthalpies up to 200,000 Btu/lb, temperatures as high as 45,000 f R, pressures ranging from 0.0l to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c10232eb6bb53af956c6472a505e8c55
https://doi.org/10.2514/8.5894
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6
Solar absorptance and hemispherical emittance of various metals at space conditions
Autor: E. W. Spisz, J. R. Jack
Publikováno v: 7th Aerospace Sciences Meeting.
Solar absorptance and hemispherical emmitance of metals at space conditions determined with cyclic incident radiation technique
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4866cc90b18bb44625d7c1b55da0a130
https://doi.org/10.2514/6.1969-60
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7
NASA RESEARCH ON RESISTANCE-HEATED HYDROGEN JETS
Autor: J. R. Jack, E. W. Spisz
Publikováno v: Electric Propulsion Conference.
Experimental results concerning the design of resistance-heated hydrogen thrustors, including performance considerations
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::56165d8be86bc1152af65715c33d4e64
https://doi.org/10.2514/6.1963-23
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8
The effect of rocket plume contamination on the optical properties of transmitting and reflecting materials
Autor: E. W. Spisz, J. F. Cassidy, J. R. Jack
Publikováno v: 10th Aerospace Sciences Meeting.
The preliminary results of plume contamination from a 5-pound thrust single-doublet, bipropellant rocket engine on the transmittance of quartz and the reflectance of a silicon monoxide overcoated aluminum mirror are presented. Changes in quartz trans
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d03543541e14ebb3b6dbba0192e26696
https://doi.org/10.2514/6.1972-56
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