Results 71 to 80 of about 54,948 (200)
On the origin of \gamma-ray emission in \eta\ Carina
, 2015 \eta\ Car is the only colliding-wind binary for which high-energy \gamma\ rays are detected. Although the physical conditions in the shock region change on timescales of hours to days, the variability seen at GeV energies is weak and on significantly ...
Hinton, J. A. +3 more
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Advanced ceramic material for high temperature turbine tip seals [PDF]
Ceramic material systems are being considered for potential use as turbine blade tip gas path seals at temperatures up to 1370 1/4 C. Silicon carbide and silicon nitride structures were selected for study since an initial analysis of the problem gave ...
Solomon, N. G., Vogan, J. W.
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, 2008 Identifying patients at risk of traumatic brain injury (TBI) is important because research suggests prophylactic treatments to reduce risk of long-term sequelae.
Alexander MP +29 more
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High performance ammonium nitrate propellant [PDF]
, 1979 A high performance propellant having greatly reduced hydrogen chloride emission is presented. It is comprised of: (1) a minor amount of hydrocarbon binder (10-15%), (2) at least 85% solids including ammonium nitrate as the primary oxidizer (about 40% to ...
Anderson, F. A.
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Analysis of Possible Quantum Metastable States in Ballistic Graphene-based Josephson Junctions
, 2010 Graphene is a relatively new material (2004) made of atomic layers of carbon arranged in a honeycomb lattice. Josephson junction devices are made from graphene by depositing two parallel superconducting leads on a graphene flake.
Carabello, Steven +2 more
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International Journal of TechnologyMilitary equipment development, especially means of transportation, currently revolves around material selection, which includes hybrid laminate composite as a prominent material choice due to its strength-to-weight ratio.
Salsabila Syifa +3 more
doaj +1 more source
Development of Si3N4 and SiC of improved toughness [PDF]
The application of energy absorbing surface layers to Si3N4 and SiC was investigated. Among the layers studied were microcracked materials such as iron titanate and a silica-zircon mixture and porous materials such as reaction sintered Si3N4.
Brennan, J. J., Hulse, C. O.
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, 2016 Understanding ballistic phonon transport effects in transient thermoreflectance experiments and explaining the observed deviations from classical theory remains a challenge.
Lundstrom, Mark, Maassen, Jesse
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Advances in Mechanical Engineering, 2015 The association of the failure behavior of the AZ31B magnesium alloy with absorption energy under ballistic impact condition was investigated in this study, as well as the effect of varying percentages of added lead (Pb) content.
Mohamad Faizal Abdullah +4 more
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Paving the Way: The Influence of Early Research and Development Programs on Apollo, Saturn, and Legacy System Development [PDF]
As we celebrate the 50th anniversary of the first successful human landings on the surface of the Moon in 1969, it is insightful to review the many historic accomplishments that contributed to this astounding human achievement.
Cockrell, Charles E., Jr. +1 more
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