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  • BIOSCIENCES  (1,698)
  • COMMUNICATIONS  (1,377)
  • 1970-1974  (3,075)
Collection
Keywords
Years
Year
  • 1
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    Auditory system (1973)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The physical correlations of hearing, i.e. the acoustic stimuli, are reported. The auditory system, consisting of external ear, middle ear, inner ear, organ of Corti, basilar membrane, hair cells, inner hair cells, outer hair cells, innervation of hair cells, and transducer mechanisms, is discussed. Both conductive and sensorineural hearing losses are also examined.
    Keywords: BIOSCIENCES
    Type: BioTechnol., Inc. Bioastronaut. Data Book, 2d Ed.; p 667-691
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  • 2
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    Toxicology (1973)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Oxygen toxicity is examined, including the effects of oxygen partial pressure variations on toxicity and oxygen effects on ozone and nitrogen dioxide toxicity. Toxicity of fuels and oxidizers, such as hydrazines, are reported. Carbon monoxide, spacecraft threshold limit values, emergency exposure limits, spacecraft contaminants, and water quality standards for space missions are briefly summarized.
    Keywords: BIOSCIENCES
    Type: BioTechnol., Inc. Bioastronaut. Data Book, 2d Ed.; p 455-487
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  • 3
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    Antenna drive system for the Nimbus satellite (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A two-axis drive system is described for pointing a high gain antenna. Motion about each axis is provided by identical drive mechanisms. Only three gear passes are required to obtain the necessary 900:1 gear reduction. The drive system is a primary element of an experiment that will provide a real time data link between Nimbus and ground stations. Data are transmitted from Nimbus to the applications technology satellite, which relays the data to ground stations.
    Keywords: COMMUNICATIONS
    Type: NASA. Ames Res. Center 6th Aerospace Mech. Symp.; p 117-120
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  • 4
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    The Intelsat 4 antenna positioner (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The Intelsat 4 communications satellite has two spot beam antennas which are pointed to selected land masses by gimbaled positioners. The positioners employ drive motors with electromagnetic brakes and jackscrews that are self-caging during the launch. The positioner uses dry lubricants for ball bearings, spur gears, screw and nut, and various journal bearings. A coefficient of friction of approximately 0.05 was demonstrated in vacuum operation. Success of the positioner was demonstrated on the first Intelsat 4 placed in orbit in January 1971. The developmental problems that were encountered and their solutions are discussed.
    Keywords: COMMUNICATIONS
    Type: NASA. Ames Res. Center 6th Aerospace Mech. Symp.; p 109-116
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  • 5
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    Locations of solar radio bursts (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Measurements of the positions of the sources of solar radio bursts at decameter wavelengths, 20- to 60-MHz range, provide information about physical conditions in a region of the corona extending from about one-half to several solar radii from the surface of the sun. Position measurements in the 20- to 60-MHz range were made with the Clark Lake sweep-frequency grating interferometer. Although the resolution of the instrument is sufficient to measure source position accurately, the highly variable effect of refraction in the earth's ionosphere severely limits the observations, distorting position determinations to such an extent as to make much of the position data useless unless ionospheric refraction can be taken into account. A method was developed for the removal of the refractive effect from the data to permit determination of true source position. With this technique it is considered possible to measure spatial extent of radio sources that will provide information about emission processes and physical parameters in the corona.
    Keywords: COMMUNICATIONS
    Type: Significant Accomplishments in Sci., 1970; p 149-153
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  • 6
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    Reduction of near-in sidelobes using phase reversal aperture rings (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A technique is described for reducing near-in sidelobes in spacecraft antennas by cancellation. This technique takes a small portion of the radiation from the antenna aperture and generates the near-in lobes, which are then fed out of phase relative to the main signal. Results of sample cases indicate that the first three lobes can be nearly eliminated at a 40% reduction in aperture efficiency.
    Keywords: COMMUNICATIONS
    Type: JPL Quart. Tech. Rev., Vol. 1, No. 4; p 34-42
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  • 7
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    Toxicology of spacecraft materials (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The procedures for determining the toxicity of products outgassed from spacecraft structures are discussed. The test equipment involved in the tests and the criteria for acceptability are described. The use of animals as the final step in determining toxicity of a spacecraft environment is explained.
    Keywords: BIOSCIENCES
    Type: Conf. on Mater. for Improved Fire Safety; p 207-210
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  • 8
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    Electromagnetic compatibility fundamentals applied to spacecraft radio communication systems (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A design guide for minimizing electromagnetic interference in aerospace communication equipment for ground stations is presented. Specifically treated are the mechanisms of generating unwanted radio emissions that may affect station operations as well as other communications services, the mechanisms by which sensitive receivers become susceptible to interference, means for reducing interference, standard methods of measurement, and the problems of site selection. The sources of interference are viewed primarily as originating from communications transmitters aboard spacecraft and aircraft, ground transmitters within and outside the ground stations, and other electrical sources on the ground that are not intended to radiate.
    Keywords: COMMUNICATIONS
    Type: NASA. Goddard Space Flight Center Radio Freq. Interference Handbook; p 1-106
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  • 9
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    Experiment T001: Entry communication on the Gemini 3 mission (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Water addition to the Gemini 3 exhaust plasma was studied to determine its effectiveness in the establishment of communication links during the entry portion of the flight. Attenuation levels were measured with and without water injection at uhf frequencies of 230.4 and 296.8 megahertz and at the C-band frequency of 5690 megahertz. Ultrahigh frequency signals that had been blacked out were restored to significant levels, during early portions of the water-injection sequence, by the high flow rate injection. The C-band signal was enhanced by medium and high flow rate injections during the latter portion of the injection period. The uhf signal recovered during water injection resulted in an antenna pattern that was beamed in the radial direction of injection from the spacecraft. Postflight analysis showed that the uhf recovery data were consistent with injection-penetration theory.
    Keywords: COMMUNICATIONS
    Type: The Gemini Porgram: Phys. Sci. Expt. Sum.; p 471-485
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  • 10
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    Investigations on a cylindrical antenna as a diagnostic probe for isotropic and magnetized plasmas (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Impedance behavior of short cylindrical antenna used as diagnostic probe in isotropic and magnetized plasmas
    Keywords: COMMUNICATIONS
    Type: NASA. LANGLEY RES. CENTER THE ENTRY PLASMA AND ITS EFFECTS ON SPACE VEHICLE ELECTROMAGNETIC SYSTEMS, VOL. 1 1970; P 47-56
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  • 11
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    Communications control group assembly - Teletype line switching equipment (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Communications control group teletype line switching equipment for space stations
    Keywords: COMMUNICATIONS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 113-116
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  • 12
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    Antenna rigging angle optimization within structural member size design optimization (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Antenna rigging angle optimization within structural member design for improved antenna performance
    Keywords: COMMUNICATIONS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 81-87
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  • 13
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    Antenna structures - Evaluation of reflector surface distortions (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Reflector surface distortions of 210 ft antenna and their effects on radio frequency performance
    Keywords: COMMUNICATIONS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 76-80
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  • 14
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    Tracking and data acquisition elements research - Polarization diverse S band feed cone (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Polarization diverse S band feed cone for DSIF reflector antennas
    Keywords: COMMUNICATIONS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 66-72
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  • 15
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    A second/third order hybrid phase locked receiver for tracking Doppler rates (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Second/third order hybrid phase locked receiver for tracking frequency ramp signals
    Keywords: COMMUNICATIONS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 42-45
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  • 16
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    Refractivity influence on DSS Doppler data (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Examination of deep space Doppler data for terrestrial media contamination
    Keywords: COMMUNICATIONS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 31-41
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  • 17
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    The effects of spatial nonuniformities on high temperature microwave breakdown (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Effects on high temperature microwave antenna breakdown of ionization frequency, collision frequency, diffusion coefficient, and breakdown parameters
    Keywords: COMMUNICATIONS
    Type: NASA. LANGLEY RES. CENTER THE ENTRY PLASMA SHEATH AND ITS EFFECTS ON SPACE VEHICLE ELECTROMAGNETIC SYSTEMS, VOL. 1 1970; P 489-508
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  • 18
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    An automatic antenna impedance matcher for reentry vehicle applications (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Impedance matcher for automatically maximizing power radiated from X band antenna on reentry vehicle by eliminating power dissipated as heat
    Keywords: COMMUNICATIONS
    Type: NASA. LANGLEY RES. CENTER THE ENTRY PLASMA SHEATH AND ITS EFFECTS ON SPACE VEHICLE ELECTROMAGNETIC SYSTEMS, VOL. 1 1970; P 449-463
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  • 19
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    Electromagnetic wave propagation in a lossy plasma slab with a gradient transverse to the incident wave (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Computer solution of plane electromagnetic wave interaction with bounded inhomogeneous plasma slab with electron density gradient transverse to wave
    Keywords: COMMUNICATIONS
    Type: NASA. LANGLEY RES. CENTER THE ENTRY PLASMA SHEATH AND ITS EFFECTS ON SPACE VEHICLE ELECTROMAGNETIC SYSTEMS, VOL. 1 1970; P 427-448
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  • 20
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    Radiation from circumferential slots on plasma-clad cones (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Slot antenna radiation pattern distortion produced by boundary layer plasma sheath around conical reentry vehicles
    Keywords: COMMUNICATIONS
    Type: NASA. LANGLEY RES. CENTER THE ENTRY PLASMA SHEATH AND ITS EFFECTS ON SPACE VEHICLE ELECTROMAGNETIC SYSTEMS, VOL. 1 1970; P 411-425
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  • 21
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    Antenna performance in the presence of a turbulent plasma (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Antenna radiation patterns and electron density profiles in turbulent plasma flow
    Keywords: COMMUNICATIONS
    Type: NASA. LANGLEY RES. CENTER THE ENTRY PLASMA SHEATH AND ITS EFFECTS ON SPACE VEHICLE ELECTROMAGNETIC SYSTEMS, VOL. 1 1970; P 379-410
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  • 22
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    Effects of reentry plasma on RAM C-1 VHF telemetry antennas (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Reentry plasma effects on RAM C-1 VHF telemetry antenna radiation patterns
    Keywords: COMMUNICATIONS
    Type: THE ENTRY PLASMA SHEATH AND ITS EFFECTS ON SPACE VEHICLE ELECTROMAGNETIC SYSTEMS, VOL. 1 1970; P 183-201
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  • 23
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    Shock tube measurement of admittance of RAM C and RAM C-C diagnostic antennas (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Shock tube measurements of admittance of RAM C-2 and RAM C-3 diagnostic antenna admittance to analyze accuracy of calculated electron density
    Keywords: COMMUNICATIONS
    Type: THE ENTRY PLASMA SHEATH AND ITS EFFECTS ON SPACE VEHICLE ELECTROMAGNETIC SYSTEMS, VOL. 1 1970; P 157-182
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  • 24
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    RAM C-3 S-band diagnostic experiment (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: RAM C-3 S band diagnostic antenna systems and calculations of electron density profiles
    Keywords: COMMUNICATIONS
    Type: THE ENTRY PLASMA SHEATH AND ITS EFFECTS ON SPACE VEHICLE ELECTROMAGNETIC SYSTEMS, VOL. 1 1970; P 137-155
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  • 25
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    Quarantine, microbiological, and heat sterilization technologies (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Subjects on planetary flight missions, supporting technology, microbial release probabilities, heat sterilization cycles
    Keywords: BIOSCIENCES
    Type: NNING, EVALUATION, AND ANAL. STUDIES IN PLANETARY QUARANTINE AND SPACECRAFT STERILIZATION 15 JUN. 1970 (SEE N70-35042 19-04) 19-04/
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  • 26
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    Communications system research (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Coding, synchronization, combinatorial, multiple access, propagation, and permutation studies for telecommunications systems
    Keywords: COMMUNICATIONS
    Type: SPACE PROGRAMS SUM. NO. 37-61, VOL. 3 28 FEB. 1970; P 25-89
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  • 27
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    Conflicting sensory orientation cues as a factor in motion sickness (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Conflicting sensory data relating to spatial orientation from visual, vestibular, and somatosensory systems inducing motion sickness
    Keywords: BIOSCIENCES
    Type: SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 45-52
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  • 28
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    A quantitative study of vestibular adaptation in humans, part 3 (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Mathematical model for short-term adaptation to vestibular stimuli in relation to angular velocity of nystagmus and angular velocity of head rotation
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 369-393
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  • 29
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    Certain aspects of onboard centrifuges and artificial gravity (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Design criteria for onboard centrifuges in orbital space stations to create artificial gravity
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 329-346
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  • 30
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    Electrophysiological experiments on the isolated surviving labyrinth of elasmobranch fish to analyze the responses to linear accelerations (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Linear acceleration effects on semicircular canals in elasmobranch fishes
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 159-166
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  • 31
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    A resume of sessions on motion sickness (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Neurological elements in vomiting sequence and components of emetic reflex in motion sickness
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 117-120
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  • 32
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    Biomedical experiments. Part A: Biostack experiment (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The biostack experiment is described which was designed to study the biologic effects of individual heavy nuclei of galactic cosmic radiation during space flight outside the magnetosphere of the earth. Specifically, the biostack experiment was designed to promote research on the effects of high energy/high Z particles of galactic cosmic radiation on a broad spectrum of biologic systems, from the molecular to the highly organized and developed forms of life. The experiment was considered unique and scientifically meritorious because of its potential yield of information - currently unavailable on earth - on the interaction of biologic systems with the heavy particles of galactic cosmic radiation.
    Keywords: BIOSCIENCES
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 10 p
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  • 33
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    Television experiment (1973)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The fixed and variable Martian features investigated by the TV experiment on Mariner 9 are described. Articles are presented concerning the dust storm of October to November over the Southern Hemisphere; global surface geodesy and cartography; geology; and the satellite astronomy.
    Keywords: COMMUNICATIONS
    Type: Mariner Mars 1971 Proj., Vol. 5; p 63-70
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  • 34
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    The vestibular system (1973)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The end organs, central nervous system connections, and static and dynamic characteristics of the vestibular system are presented. Vestibular servation in man and vestibular side effect prevention from space missions involving artificial gravity generation are also considered. Vestibular models and design criteria for rotating space vehicles are appended.
    Keywords: BIOSCIENCES
    Type: BioTechnol., Inc. Bioastronaut. Data Book, 2d Ed.; p 533-609
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  • 35
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    Surveyor 3: Bacterium isolated from lunar retrieved television camera (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Microbial analysis was the first of several studies of the retrieved camera and was performed immediately after the camera was opened. The emphasis of the analysis was placed upon isolating microorganisms that could be potentially pathogenic for man. Every step in the retrieval of the Surveyor 3 television camera was analyzed for possible contamination sources, including camera contact by the astronauts, ingassing in the lunar and command module during the mission or at splashdown, and handling during quarantine, disassembly, and analysis at the Lunar Receiving Laboratory
    Keywords: BIOSCIENCES
    Type: Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 239-248
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  • 36
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    The Goddard helical tape recorder (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: A spacecraft recorder was developed with the objective of functioning continuously for 5 years. The resulting design employed a metallic tape wound in a 200-turn helix. A direct drive, brushless dc torquer and servo speed control drove the recorder at 3 rpm for recording and 54 rpm for playback.
    Keywords: COMMUNICATIONS
    Type: 6th Aerospace Mech. Symp.; p 89-93
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  • 37
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    Bias and spread in extreme value theory measurements of probability of error (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Extreme value theory is examined to explain the cause of the bias and spread in performance of communications systems characterized by low bit rates and high data reliability requirements, for cases in which underlying noise is Gaussian or perturbed Gaussian. Experimental verification is presented and procedures that minimize these effects are suggested. Even under these conditions, however, extreme value theory test results are not particularly more significant than bit error rate tests.
    Keywords: COMMUNICATIONS
    Type: JPL Quart. Tech. Rev., Vol. 1, No. 4; p 58-68
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  • 38
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    The use of the Earth-Moon system as a radio tracking facility (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The use of the earth-moon system for radio tracking has several potentially useful aspects, from a scientific standpoint: extension of the baseline by two orders of magnitude, absence of lunar atmosphere, higher-velocity parallax with a longer period, and the moon's more modellable rotation. The facility would be a convenient base station for other research, not directly involving the tracking capability, but utilizing its orbiting data link features.
    Keywords: COMMUNICATIONS
    Type: Proc. of the Conf. on Exptl. Tests of Gravitation Theories; p 249-251
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  • 39
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    Radio tracking with the Deep Space Network (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Range and Doppler measurements for the Mariner 6 and 7 spacecraft are described. The Doppler tracking system and the two systems of spacecraft ranging apparatus being used in the Deep Space Network are illustrated. Charged particle calibration is considered. Equipment characteristics are presented for the ranging apparatus.
    Keywords: COMMUNICATIONS
    Type: Proc. of the Conf. on Exptl. Tests of Gravitation Theories; p 158-165
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  • 40
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    Experiment Do14: Ultrahigh and very high frequency polarization (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The measurement of inhomogeneities in the electron content along the orbital paths of Gemini 8 and Gemini 9 missions was not accomplished because the tracking information was not available. The use of ultrahigh frequency radio transmission was the primary factor in the successful removal of a very high frequency Faraday rotation ambiguity; but, as was expected, this was not very useful for fine-scale polarization studies. Ionosonde data were useful in the computation of the slab thickness at the closest point of approach of the spacecraft.
    Keywords: COMMUNICATIONS
    Type: NASA. Manned Spacecraft Center The Gemini Program: Phys. Sci. Expt. Sum.; p 487-507
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  • 41
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    Spacecraft telecommunications systems - A digital command system development (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: All digital, single channel command subsystem for spacecraft communication
    Keywords: COMMUNICATIONS
    Type: SPACE PROGRAMS SUM. NO. 37-61, VOL. 3 28 FEB. 1970; P 126-129
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    Progress in vestibular modeling. Part 1 - Response of the semicircular canals to constant rotation in a linear acceleration field (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Dynamic response of semicircular canals to constant rotation in linear acceleration field
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 353-362
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  • 43
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    Secondary etiological factors in the causation of motion sickness (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Extralabyrinthine influences as secondary etiological factors in susceptibility to motion sickness
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 83-88
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  • 44
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    Applied mechanics (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Spacecraft antenna optimization, receptance coupling program, deformation modes and dynamic response of structures, and holographic measurements
    Keywords: COMMUNICATIONS
    Type: SPACE PROGRAMS SUM. NO. 37-61, VOL. 3 28 FEB. 1970; P 171-190
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  • 45
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    Calibration of radar data from Apollo 16 results, part X (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Predictions of surface and near surface blockiness using earth based radar measurements were made. Two polarizations of the radar echoes were measured - polarized and depolarized. Particular attention was given to the depolarized echoes. North Ray and South Ray Craters and a 512-m diameter lunar crater in the Flamsteed Ring were used for the study.
    Keywords: COMMUNICATIONS
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 3 p
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  • 46
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    Microbial response to space environment, part B (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The performance of the microbial response to space environment experiment is considered excellent by all investigators. For most microbial systems, only preliminary survival data are available at this time. None of the available data indicate space flight-mediated changes in cell viability or recovery. One quite important observation has been made at this early date, however. The eggs produced after mice had been infected with N. dubius larvae demonstrated a significant decrease in hatchability when compared to identical ground controls. Except for the fact that the Apollo 16 flight larvae had been on board the command module, treatment of the flown larvae and ground control larvae was the same; neither had been exposed to UV irradiation. The significance and implications of this finding are currently being studied.
    Keywords: BIOSCIENCES
    Type: Apollo 16 Prelim. Sci. Rept.; 6 p
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  • 47
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    Visual light flash phenomenon, part C (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The Apollo 16 mission provided the opportunity to obtain additional data on the characteristics and frequency of the light flashes and also provided the first opportunity to obtain a direct physical record of incident cosmic ray particles with the Apollo light flash moving emulsion detector (ALFMED). The ALFMED is an electromechanical device that is worn on the head like a helmet and supports cosmic radiation-sensitive emulsions around the head of the test subject. Two light flash observation sessions were conducted during the mission: one during translunar coast and the second during transearth coast. Characteristics of the light flashes observed and reported by the Apollo crew members were generally similar to those reported on previous missions. Analyses of the ALFMED emulsion plates are proceeding as scheduled, although results are not yet available. The ALFMED results should provide conclusive evidence establishing the correlation, if any, between the incident cosmic ray particles and the perception of light flashes as reported by Apollo crew members.
    Keywords: BIOSCIENCES
    Type: Apollo 16 Prelim. Sci. Rept.; 4 p
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  • 48
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    Bistatic-radar investigation (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The purpose of the reported experiment was to determine the principal electromagnetic and structural properties of the lunar surface from the observation of command and service module (CSM) radio transmissions that were reflected from the lunar surface and received on earth. These transmissions emanate from the CSM communication systems at wavelengths of 13 cm (S-band) and 116 cm (very high frequency (VHF)). Lunar crustal properties such as dielectric constant, average slope and slope probability, density, small-scale surface roughness, and embedded rocks to a depth of 20 m may be determined. The results are proving to be most useful in understanding the processes that have produced and modified the crust and in distingushing between adjacent and subjacent geological units. The experimental observations are also of intrinsic interest in the study of electromagnetic scattering.
    Keywords: COMMUNICATIONS
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 13 p
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  • 49
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    Electromagnetic compatibility design guideline for STADAN (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Procedures for achieving electromagnetic compatibility in electronic and electrical equipment for aerospace ground stations are investigated. The application of shielding theory to good design is treated and standards of good practice are outlined for bonding, grounding, wiring, and cabling. Some aspects of filter design are explained, and suggestions are given for the application of filters to electronic and electrical equipment.
    Keywords: COMMUNICATIONS
    Type: NASA Goddard Space Flight Center Radio Freq. Interference Handbook; p 107-198
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  • 50
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    Overview of the AF Avionics Laboratory reentry electromagnetics program (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Radio wave propagation through plasmas studied for communication with hypersonic vehicles during reentry
    Keywords: COMMUNICATIONS
    Type: NASA. LANGLEY RES. CENTER THE ENTRY PLASMA SHEATH AND ITS EFFECTS ON SPACE VEHICLE ELECTROMAGNETIC SYSTEMS, VOL. 1 1970; P 3-17
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  • 51
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    Communications elements research (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Components and techniques for radio and optical space communication
    Keywords: COMMUNICATIONS
    Type: SPACE PROGRAMS SUM. NO. 37-61, VOL. 3 28 FEB. 1970; P 90-120
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  • 52
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    Experimental studies of the eliciting mechanism of motion sickness (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Linear acceleration movements as eliciting mechanism of motion sickness
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 7-28
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  • 53
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    Walking in simulated lunar gravity (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Energy requirements for walking in simulated lunar gravity
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 347-352
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  • 54
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    Experimental and clinical experiences and comments on ultrasonic treatment of Meniere's disease (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Experimental and clinical treatment of Meniere's disease using ultrasonic radiation
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 269-284
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  • 55
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    The cerebellovestibular interaction in the cat's vestibular nuclei neurons (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Postsynaptic effects of vestibular and cerebellar impulses in vestibular nuclei neurons of cat
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 183-200
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  • 56
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    Computer analysis of single-unit discharges in the vestibular nerve of the frog (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Computer analysis of single-unit discharges in vestibular nerve of frog
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 137-144
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  • 57
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    The symptomatology of motion sickness (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Inadequate and inappropriate vascular and circulatory responses as causative factors in motion sickness
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 89-98
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  • 58
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    The otolith organs as a primary etiological factor in motion sickness - With a note on off-vertical rotation (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Otolith organs as primary etiological factor in motion sickness
    Keywords: BIOSCIENCES
    Type: SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 53-66
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  • 59
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    The problem of homeostasis in space medicine (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Life support systems and space suits for preserving homeostatic reactions of astronauts
    Keywords: BIOSCIENCES
    Type: TRANS. OF THE FIRST LECTURES DEDICATED'TO THE DEVELOP. OF THE SCI. HERITAGE OF K. E. TSIOLKOUSKIY APR. 1970; P 91-98
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  • 60
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    Spacecraft radio - TOPS radio frequency subsystem (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Radio frequency subsystem requirements and estimated reliability data for Thermoelectric Outer Planet Spacecraft
    Keywords: COMMUNICATIONS
    Type: SPACE PROGRAMS SUM. NO. 37-61, VOL. 3 28 FEB. 1970; P 121-125
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  • 61
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    Evolution of a spacecraft antenna system (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Mechanically despun antenna system design for spin stabilized spacecraft used in ATS and Intelsat systems
    Keywords: COMMUNICATIONS
    Type: JPL PROC. OF THE 4TH AEROSPACE MECH. SYMP. 15 JAN. 1970; P 13-18
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  • 62
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    Vision (1973)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Some data on human vision, important in present and projected space activities, are presented. Visual environment and performance and structure of the visual system are also considered. Visual perception during stress is included.
    Keywords: BIOSCIENCES
    Type: BioTechnol., Inc. Bioastronaut. Data Book, 2d Ed.; p 611-665
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  • 63
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    Respiratory system (1973)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The general anatomy and function of the human respiratory system is summarized. Breathing movements, control of breathing, lung volumes and capacities, mechanical relations, and factors relevant to respiratory support and equipment design are discussed.
    Keywords: BIOSCIENCES
    Type: BioTechnol., Inc. Bioastronaut. Data Book, 2d Ed.; p 489-531
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  • 64
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    Radar augmentation device (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The radar augmentation device (RAD) serves to increase the radar response of a target body and thus expedite radar acquisition. The design and development of the RAD are discussed with particular emphasis on technical problems that were encountered and solved. Discussions of the mode of operation of the RAD and the ground test history are also included.
    Keywords: COMMUNICATIONS
    Type: NASA. Ames Res. Center 6th Aerospace Mech. Symp.; p 65-72
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  • 65
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    Microbiological sampling of returned Surveyor 3 electrical cabling (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A piece of electrical wiring bundle running from the television camera to another part of the spacecraft was selected for microbiological examination. Sampling methods are discussed. The results presented show that no viable microorganisms were recovered from the part of the Surveyor 3 cable which was tested. Factors that could have contributed to the sterility of the cable are thermal vacuum testing, natural dieoff, change in pressure during launch, and lunar vacuum and temperature.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 248-251
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  • 66
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    Magnetospheric radio noise (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Observations, made by the RAE satellite, of earth magnetospheric noise are reported. The observations show radio noise exists at 700 kHz and below. The results are included in graphs.
    Keywords: COMMUNICATIONS
    Type: Significant Accomplishments in Sci., 1970; p 75-80
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  • 67
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    Thresholds for the perception of angular acceleration about the three major body axes (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Perception thresholds of rotation about three major body axes
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 299-306
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  • 68
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    Multisensory influence upon single units in the vestibular nucleus (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Multisensory stimulation effects on single units in vestibular nucleus of cat
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 201-208
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  • 69
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    Prevention of motion sickness in the slow rotation room by incremental increases in strength of stimulus (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Preventing motion sickness in slow rotation room by incremental increases in strength of stimulus
    Keywords: BIOSCIENCES
    Type: SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 109-116
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  • 70
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    Vestibular activity in the descending medial longitudinal fasciculus (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Vestibular activity in descending medial longitudinal fasciculus
    Keywords: BIOSCIENCES
    Type: SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 237-242
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  • 71
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    Anatomical aspects on the functional organization of the vestibulospinal projection, with special reference to the sites of termination (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Functional organization of vestibulospinal projection in ear, emphasizing sites of termination
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 167-182
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  • 72
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    Use of drugs in the prevention of motion sickness (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Scopolamine and d-amphetamine in prevention of motion sickness
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 99-108
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  • 73
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    Experiences with research on motion sickness (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Motion sickness susceptibility related to wave character and effects of sickness on performance
    Keywords: BIOSCIENCES
    Type: NAVAL AEROSPACE MED. INST. 4TH SYMP. ON THE ROLE OF THE VESTIBULAR ORGANS IN SPACE EXPLORATION 1970; P 29-32
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  • 74
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    Electrical manifestations of cardiac activity (1971)
    In:  CASI
    Details
    Publication Date: 2009-11-16
    Description: Electrocardiography and vector cardiography of athletes
    Keywords: BIOSCIENCES
    Type: HEART AND SPORTS- ESSAYS ON CARDIOLOGY IN SPORTS FEB. 1971; P 106-149
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  • 75
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    Some comments on control of the microvascular system (1971)
    In:  CASI
    Details
    Publication Date: 2009-11-16
    Description: Dynamic model for microvascular system control of mammal body kinematics
    Keywords: BIOSCIENCES
    Type: INTRODUCTION TO A BIOL. SYSTEMS SCI. FEB. 1971; P 76-112
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  • 76
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    Psychological factors of prolonged space flights (1970)
    In:  CASI
    Details
    Publication Date: 2009-11-17
    Description: Psychological factors of prolonged space flight on astronaut performance
    Keywords: BIOSCIENCES
    Type: TRANS. OF THE FIRST LECTURES DEDICATED TO THE DEVELOP. OF THE SCI. HERITAGE OF K. E. TSIOLKOVSKIY APR. 1970; P 98-105
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  • 77
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    Subjective and nystagmus reactions considered in relation to models of vestibular function (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Modelling will become increasingly important as more knowledge is accumulated, because it offers advantages in predicting reactions of individuals in a variety of situations, including novel aerospace environments, and in specifying a few parameters which should have considerable clinical significance. However, the need for continuing experimental crosschecks of these models has been illustrated by several sets of results which would not have been predicted by any existing models.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 211-219
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  • 78
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    Artifacts produced during electrical stimulation of the vestibular nerve in cats (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Evidence is presented to indicate that evoked potentials in the recurrent laryngeal, the cervical sympathetic, and the phrenic nerve, commonly reported as being elicited by vestibular nerve stimulation, may be due to stimulation of structures other than the vestibular nerve. Experiments carried out in decerebrated cats indicated that stimulation of the petrous bone and not that of the vestibular nerve is responsible for the genesis of evoked potentials in the recurrent laryngeal and the cervical sympathetic nerves. The phrenic response to electrical stimulation applied through bipolar straight electrodes appears to be the result of stimulation of the facial nerve in the facial canal by current spread along the petrous bone, since stimulation of the suspended facial nerve evoked potentials only in the phrenic nerve and not in the recurrent laryngeal nerve. These findings indicate that autonomic components of motion sickness represent the secondary reactions and not the primary responses to vestibular stimulation.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 115-123
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  • 79
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    Perception of the upright and susceptibility to motion sickness as functions of angle of tilt and angular velocity in off-vertical rotation (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Motion sickness susceptibility of four normal subjects was measured in terms of duration of exposure necessary to evoke moderate malaise (MIIA) as a function of velocity in a chair rotated about a central axis tilted 10 deg with respect to gravitational upright. The subjects had little or no susceptibility to this type of rotation at 2.5 and 5.0 rpm, but with further increases in rate, the MIIA endpoint was always reached and with ever shorter test durations. Minimal provocative periods for all subjects were found at 15 or 20 rpm. Higher rotational rates dramatically reversed the vestibular stressor effect, and the subjects as a group tended to reach a plateau of relatively low susceptibility at 40 and 45 rpm. At these higher velocities, furthermore, the subjects essentially lost their sensation of being tilted off vertical. In the second half of the study, the effect of tilt angle was varied while the rotation rate was maintained at a constant 17.5 rpm. Two subjects were completely resistant to symptoms of motion sickness when rotated at 2.5 deg off vertical; with greater off-vertical angles, the susceptibility of all subjects increased sharply at first, then tapered off in a manner reflecting a Fechnerian function.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 99-103
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  • 80
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    Crew microbiology (DTO 71-19) (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: States of microbial imbalance as a result of human altitude chamber confinement occurred, for the most part, only in those genera and species of bacteria, yeast, and fungi which are classified as transients and are not part of the true indigenous flora of the crewmembers. Inasmuch as no crew illness events occurred and only subtle changes in the indigenous flora were noted, it appears that confinement of 56-days in a Skylab simulated environment does not mediate toward shifts in bacterial populations which have obvious clinical significance.
    Keywords: BIOSCIENCES
    Type: Skylab Med. Expt. Altitude Test (SMEAT); 12 p
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  • 81
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    Use of Lorente de No's neuron circuit model for describing acceleratory nystagmus (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Results of a previous metric analysis and an electronic simulation of acceleratory nystagmus are given. On this basis, a tentative mathematical model for describing acceleratory nystagmus is reported. The essential content of the model is Lorente de No's neuron circuit, to which the two-factor theory of excitation has been applied.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 263-272
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  • 82
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    Systems analysis of the vestibulo-ocular system (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The vestibulo-ocular system is examined from the standpoint of system theory. The evolution of a mathematical model of the vestibulo-ocular system in an attempt to match more and more experimental data is followed step by step. The final model explains many characteristics of the eye movement in vestibularly induced nystagmus. The analysis of the dynamic behavior of the model at the different stages of its development is illustrated in time domain, mainly in a qualitative way.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 237-249
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  • 83
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    Use of Steinhausen's model for describing periodic Coriolis star nystagmus (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Phase lag, maximal slow phase velocity, and beat frequency were measured in periodic Coriolis star nystagmus. The results have been described by Steinhausen's model of the semicircular canal system. Estimates of the biophysical constants have been obtained. It is concluded that this model is a good functional approximation for describing, and also for interpreting, the behavior of the system.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 251-262
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  • 84
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    On visual-vestibular interaction (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Experimental evidence is presented regarding visual vestibular interaction, and the results of three studies on the subject are briefly noted. An attempt to put together some of these observations with elementary notions of a visual vestibular interaction program is shown in the form of a flow chart representation of a possible model. This is a nonlinear model in which visual and vestibular influences are linearly weighted when they are in relative agreement but switch to the more believable one when they are in disagreement. A solution to the human space orientation problem is depicted by a schema for optimal subjective orientation based on several sensory modalities.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 205-210
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  • 85
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    Responses to rotating linear acceleration vectors considered in relation to a model of the otolith organs (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Human subjects were exposed to a linear acceleration vector that rotated in the transverse plane of the skull without angular counterrotation. Lateral eye movements showed a sinusoidal change in slow phase velocity and an asymmetry or bias in the same direction as vector rotation. A model is developed that attributes the oculomotor response to otolithic mechanisms. It is suggested that the bias component is the manifestation of torsion of the statoconial plaque relative to the base of the utricular macula and that the sinusoidal component represents the translational oscillation of the statoconia. The model subsumes a hypothetical neural mechanism which allows x- and y-axis accelerations to be resolved. Derivation of equations of motion for the statoconial plaque in torsion and translation, which take into account forces acting in shear and normal to the macula, yield estimates of bias and sinusoidal components that are in qualitative agreement with the diverse experimental findings.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 221-236
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  • 86
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    Otolithic influences on extraocular and intraocular muscles (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Selective stimulation of utricular gravireceptors leads to gross activation of the bulbar reticular formation where a strong interaction with evoked spino-bulbo-spinal reflex activity occurs. The utricular neurons encountered by microelectrodes in the lateral vestibular nuclei show four types of elicited activity; two of these display an increased firing rate, and two exhibit pronounced inhibitory effects. Application of a stimulus of long duration and constant intensity to the utricle has shown that rapid adaptation of the peripheral receptors is a prominent feature. The effects of selective utricular stimulation upon eye movements, as recorded by the corneoretinal potential method, have been studied in experiments on cats and monkeys and it can be firmly stated that prolonged stimulation of the utricle can evoke strong primary nystagmus, followed by a secondary nystagmus at the cessation of stimulation. The action of utricular stimulation on ocular reflexes has been examined further, with particular attention to evoked pupillary reactions in both cats and monkeys: constriction during the fast phase of the brisk conjugate eye movement, and dilatation during the flow phase.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 195-201
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  • 87
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    Habituation of vestibular responses: An overview (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: An historical survey of vestibular habituation experiments has been undertaken. Methodological problems are presented briefly, and the influence of arousal on vestibular responses is detailed. Data obtained from animals and from man are treated separately. At least for man, the term habituation may be better defined by a dynamic change in the form of vestibular responses than by a simple response reduction.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 157-193
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  • 88
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    Scanning electron microscopy of the vestibular end organs (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The vestibular end organs, after chemical fixation, were freeze dried, coated with gold and palladium, and studied in the scanning microscope. Scanning microscopy gives a good three dimensional view of the sensory areas and allows study of both gross anatomy and microstructures. Cross anatomical features of the structure of the ampullae are demonstrated. The form of the statoconia in different species of animals is shown. New aspects of the structure of the sensory hairs are revealed. The hair bundles in the central areas of the cristae and in the striola of the maculae differ structurally from the hair bundles at the periphery of the sensory regions. Furthermore, some hair bundles consisting of very short stereocilia were observed. The relationship between the cupula and the statoconial membrane to the epithelial surface is discussed.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 145-156
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  • 89
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    Anti-motion-sickness therapy (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Neither alterations in environmental temperature nor moderate intake of alcohol was found to alter susceptibility to motion sickness in subjects exposed to rotation in the Pensacola slow rotation room. Scopolamine with d-amphetamine was found to be the most effective preparation for the prevention of motion sickness under the experimental conditions of the studies reported here. Promethazine in combination with d-amphetamine was in the same range of effectiveness. Drug actions suggest that acetylcholine and norepinephrine may be involved in motion sickness.
    Keywords: BIOSCIENCES
    Type: NASA, Washinton Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 109-114
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  • 90
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    Structure of proton centers and associated nonthermal bursts at microwave frequencies (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-05
    Description: A very broad band of electromagnetic radiation is emitted during solar flares, especially at the explosive phase. The existence of a large variety of plasmas with various densities and a wide range of temperatures or energies is proposed as the initiating agent. The manner in which the plasmas are heated and accelerated to subrelativistic and relativistic energies is discussed. Observational evidence on the characteristics of active regions which produced proton flares and on the structure of the associated nonthermal microwave bursts of the sun is presented. The behavior of subrelativistic electrons on the sun is described.
    Keywords: COMMUNICATIONS
    Type: NASA, Washington High Energy Phenomena on the Sun; p 78-86
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  • 91
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    Vibration resistance of the wire-feed mechanism of a magnetic recording apparatus (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: The effects of external mechanical and climatic actions on the efficient operation of magnetic tape recording equipment are analyzed. The efficiency and reliability of the recording system are determined by the structural parameters and the characteristics of the individual elements of the transport mechanism circuit. The resistance of tape recording equipment to the effects of vibration is considered essential for reliable operations. Methods for insuring reliable tape transport and recording action are discussed.
    Keywords: COMMUNICATIONS
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 271-274
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  • 92
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    Measurement of irregularities in angular velocities of rotating assemblies in memory devices on magnetic carriers (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: Problems in measurement of irregularities in angular velocity of rotating assemblies in memory devices with rigid and flexible magnetic data carriers are discussed. A device and method for determination of change in angular velocities in various frequency and rotation rate ranges are examined. A schematic diagram of a photoelectric sensor for recording the signal pulses is provided. Mathematical models are developed to show the amount of error which can result from misalignment of the test equipment.
    Keywords: COMMUNICATIONS
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 279-282
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  • 93
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    Error analysis of bent ray radio occultation measurments (1972)
    In:  CASI
    Details
    Publication Date: 2006-03-12
    Description: There are two types of experimental measurement errors of the Doppler data associated with the radio occultation, random and systematic. Random errors are due to thermal noise in the transmission channel, and the phase lock loop, and quantization error in the digital circuitry. These are called noise type errors. The systematic errors are due to geometric uncertainty and equipment phase instability. Considered is the amount of uncertainty, due to random measurement errors, in the refractivity profiles reconstructed by this type of indirect sensing experiment. A class of refractivity profiles is defined which approximately fit the set of measured data. Bounds are placed on the extent of this class of solution profiles. To accomplish this, the sensivity of the reconstructed refractivity profiles to errors in the measured quantity and the statistics of the errors in the measurement are examined.
    Keywords: COMMUNICATIONS
    Type: NASA. Ames Res. Center Math. of Profile Inversion; 5 p
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  • 94
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    Some special cases of the electromagnetic inverse problem (1972)
    In:  CASI
    Details
    Publication Date: 2006-03-12
    Description: A review of exact techniques for determining the surface of a three-dimensional perfectly conducting body is given, followed by some new results on the uniqueness question concerning the number of measurements that may be required to explicitly determine the surface of the body. It is then shown that the inhomogeneous but spherically symmetric dielectric electromagnetic case is reducible to a scalar inverse problem that can be treated by known techniques.
    Keywords: COMMUNICATIONS
    Type: NASA. Ames Res. Center Math. of Profile Inversion; 11 p
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  • 95
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    Spacecraft ion beam noise effects (1972)
    In:  CASI
    Details
    Publication Date: 2006-02-22
    Description: An estimate of the antenna noise temperature and the uplink signal-to-noise ratio has been made for Bremsstrahlung radiation emitted by a spacecraft ion beam; a worst-case situation in which the spacecraft antenna is located in the exit plane of the ion beam and directed at varying angles into the ion beam is assumed. Numerical results of the antenna noise temperature versus antenna pointing angle are given for a typical set of ion beam and antenna pattern parameters. The uplink signal-to-noise ratio due to the ion beam noise alone is given in terms of a critical range in AU at which a typical ranging transmission is received with S/N = 0 db. The effects of the ion beam divergence angle and antenna distance on the ion beam are also presented. Results of the study show typical increases in the antenna noise temperature of about 0.2 K and critical ranges of the order of 3-5 AU. An ion engine thus generally introduces an undetectable level of noise into a spacecraft receiver.
    Keywords: COMMUNICATIONS
    Type: JPL Quart. Tech. Rev., Vol. 2, No. 2; p 61-71
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  • 96
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    Interplex: An analysis of optimized power allocations for two and three channel PSK/PM telecommunications systems (1972)
    In:  CASI
    Details
    Publication Date: 2006-02-22
    Description: Optimal design concepts are presented for two- and three-channel telemetry modes in the context of the Mariner Venus-Mercury 1973 mission and the usefulness of interplex modulation techniques is discussed. These ideas are applied as an example to one Mariner Venus-Mercury 1973 telemetry mode to demonstrate that interplex can reduce the required total average power by more than 2 dB in some cases.
    Keywords: COMMUNICATIONS
    Type: JPL Quarterly Tech. Rev., Vol. 2, No. 1; p 143-151
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  • 97
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    Analysis of the failure of a polyester peripheral drive belt on the Mariner Mars 1971 flight tape recorder (1972)
    In:  CASI
    Details
    Publication Date: 2006-02-22
    Description: A peripheral drive belt on the Mariner Mars 1971 tape recorder failed when a thin longitudinal strip separated off one edge. Analysis showed that the most probable cause of failure occurred from flexural fatigue initiating in mechanically weak locations which are introduced into the belt during fabrication. Methyl ethyl ketone, which is employed as a cleaning solvent during fabrication, was found to cause permanent reduction in engineering properties of polyester and could have contributed to the reduction of the fatigue resistance. Fatigue properties of the polyester drive belt are reviewed for the operating condition, as well as the sensitivity of polyester to cleaning solvents and the origin of mechanically weak locations.
    Keywords: COMMUNICATIONS
    Type: JPL Quarterly Tech. Rev., Vol. 2, No. 1; p 82-99
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  • 98
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    Studies on the frictional behavior of magnetic recording tapes (1972)
    In:  CASI
    Details
    Publication Date: 2006-02-22
    Description: Methods were developed for measuring frictional forces acting on a magnetic tape in motion or at rest, as well as the extent of stick slip. The effects of factors such as temperature, humidity, kind of gaseous atmosphere, and tape speed on the frictional interaction between various tapes and heads were investigated. Results were instrumental in the selection of a tape for the Mariner Mars 1971 spacecraft. Studies are reported on the stick slip behavior of tapes and the performance of a metallic tape, compared with the usual plastic tapes.
    Keywords: COMMUNICATIONS
    Type: JPL Quarterly Tech. Rev., Vol. 2, No. 1.; p 100-106
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  • 99
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    The ferrioxalate actinometry system of the microbial response to space environment experiment (M191) (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: The fluid actinometry portion of the Microbial Response to Space Environment Experiment (M191) was designed for measurement of the solar energy that penetrates certain optical filter systems during exposure in space. Potassium ferrioxalate was used to measure energy at peak wavelengths of 254, 280, and 300 nanometers because of its high degree of sensitivity and its linear response to the middle ultraviolet regions.
    Keywords: BIOSCIENCES
    Type: NASA. Johnson Space Center Proc. of the Microbial Response to Space Environ. Symp.; p 169-178
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  • 100
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    Effects of space environment on T-7 bacteriophage and spores of Bacillus subtilis 168 (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: Two strains of Bacillus subtilis were exposed to components of the ultraviolet spectrum in space. Both strains possess multiple genetic markers, and one of the strains is defective in the ability to repair ultraviolet damage. The T-7 bacteriophage of Escherichia coli was also exposed to selected wavelengths and energy levels of ultraviolet light in space. Preliminary findings do not reveal anomalies in survival rates. Data are not yet available on detailed genetic analyses.
    Keywords: BIOSCIENCES
    Type: NASA. Johnson Space Center Proc. of the Microbial Response to Space Environ. Symp.; p 65-85
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