Landing impact attenuation for non-surface- planing landers
Landing impact attenuation for non-surface planing landers
Jones, R. H.↗
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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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Attenuation measurements in artificial clouds Final technical report
Attenuation and near-forward scattering of both ice and water fogs and dependence of spectral curves of transmittance on particle size distribution
Burch, D. E.↗
Attenuation of sound in soft-walled circular ducts
Broadband sound attenuation in soft walled /low acoustic impedance/ circular ducts found dependent on frequency
Rice, E. J.↗
Attenuation length for photoelectrons in metal films
Attenuation length of vacuum UV photoexcited electrons in evaporated metal films, observing lack of dependence on photon energy
Moore, G.↗
Influence of degeneracy on coherent pulse propagation in an inhomogeneously broadened attenuator
Coherent pulse propagation in inhomogeneously broadened attenuator, examining degeneracy influence and connection with self induced transparency /SIT/ in nondegenerate system
Hopf, F. A.↗
Attenuation of plane wave and higher order mode sound propagation in lined ducts
Perturbation method to obtain analytical expressions for attenuation of plane wave sound propagation in lined ducts
Doak, P. E.↗
Physical mechanisms of seismic-wave attenuation
Seismic wave attenuation mechanisms emphasizing partial melting, grain boundary relaxation and high temperature internal friction background
Anderson, D. L.↗
Ultrasonic attenuation and velocity measurements in the normal and superconducting states of niobium
Ultrasonic attenuation and velocity measurements in normal and superconducting states of niobium
Keck, M. J.↗
Acoustic attenuation determined experimentally during engine ground tests of the XB-70 airplane and comparison with predictions
Acoustic attenuation determined experimentally during engine ground tests of XB-70 airplane and comparison with predictions
Mc Leod, N. J.↗
Means for suppressing or attenuating bending motion of elastic bodies Patent
Development of systems for automatically and continually suppressing or attenuating bending motion in elastic bodies
Howard, J. C.↗
An experimental study of noise attenuation by liquid injection
Noise attenuation by injection of evaporating droplets into subsonic duct flow
Gilbert, G. B.↗
Elastic and attenuation symmetries of simulated lunar rocks
Igneous and metamorphic rocks as simulated lunar rocks, determining elastic and attenuation symmetry by quasi-longitudinal pulse velocity and amplitude measurements on spherical specimens
Bur, T. R.↗
Attenuation of seismic waves by grain boundary relaxation
Elastic seismic waves attenuation in polycrystalline ceramics and rocks by grain boundary relaxation, noting strong frequency dependence of earth mantle internal friction
Jackson, D. D.↗
Anomalous ultrasonic attenuation in pure superconducting Nb
Anomalous ultrasonic attenuation in pure superconducting Nb from pulse echo amplitude measurements
Daniel, A. C.↗
A Compton scatter attenuation gamma ray spectrometer
Compton attenuation technique, utilizing semiconductor sum-Compton detectors, has been proposed for gamma ray spectrometer capable of gamma spectral measurements in radition fields of 100 R/hr to one million R/hr. Spectrometer consists of two or more separate detectors, with only primary detector exposed to primary incident photon flux.
Austin, W. E.↗
A Compton scatter attenuation gamma ray spectrometer
A Compton scatter attenuation gamma ray spectrometer conceptual design is discussed for performing gamma spectral measurements in monodirectional gamma fields from 100 R per hour to 1,000,000 R per hour. Selectable Compton targets are used to scatter gamma photons onto an otherwise heavily shielded detector with changeable scattering efficiencies such that the count rate is maintained between 500 and 10,000 per second. Use of two sum-Compton coincident detectors, one for energies up to 1.5 MeV and the other for 600 keV to 10 MeV, will allow good peak to tail pulse height ratios to be obtained over the entire spectrum and reduces the neutron recoil background rate.
Austin, W. E.↗
Attenuation studies at 35 GHz
Instrumentation and preliminary results of studies of attenuation of 35 GHz radio signals transmitted through the atmosphere are reported. The purpose of this work is to provide information to supplement the ATS-5 downlink tests. Data on atmospheric losses at 35 GHz are being obtained by sun tracker techniques, sky temperature observations, and point-to-point transmissions.
Lo, L.↗
Apollo experience report: Command module crew-couch/restraint and load-attenuation systems
The Apollo command module crew-couch/restraint and load-attenuation system was required to support and restrain the crewman during mission phases and to limit the load imposed on the crewman during landing. Component designs evolved when requirements changed and tests were conducted. Advancement in the state of the art for energy-absorbing devices and changes in restraint philosophies for impact protection resulted from the efforts and experiences presented.
Drexel, R. E.↗