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  • GEOPHYSICS  (2,353)
  • General Chemistry  (921)
  • Organic Chemistry  (720)
  • SPACE VEHICLES  (556)
  • INSTRUMENTATION AND PHOTOGRAPHY  (540)
  • BIOSCIENCES  (307)
  • Cell & Developmental Biology
  • EARTH RESOURCES AND REMOTE SENSING
  • 1980-1984
  • 1970-1974  (5,619)
  • 1910-1914
  • 1973  (5,619)
Collection
Keywords
Publisher
Years
  • 1980-1984
  • 1970-1974  (5,619)
  • 1910-1914
Year
  • 1
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    Radiography (1973)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: Radiography is discussed as a method for nondestructive evaluation of internal flaws of solids. Gamma ray and X-ray equipment are described along with radiographic film, radiograph interpretation, and neutron radiography.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Nondestructive Testing; p 63-99
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  • 2
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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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  • 3
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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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  • 4
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    Ultraviolet spectrometer experiment (1973)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The original scientific objectives and the achieved results are discussed. The upper atmosphere was found to have a variable temperature, with a mean exospheric temperature of 325 K; composed predominantley of CO2. Measurements of hydrogen and ozone are analyzed.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: JPL Mariner Mars 1971 Proj., Vol. 5; p 53-61
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  • 5
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    The vestibular system (1973)
    In:  CASI
    Details
    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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  • 6
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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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  • 7
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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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  • 8
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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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  • 9
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    Zodiacal light photography (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Polarized and red- and blue-filter photographs of zodiacal light obtained by Apollo 17 are analyzed. Attempts were made to identify the cause of subtle change in the observed light and determine the dust composition of the light. A comparison of red and blue images indicates such changes may be caused by particle size distribution and range, number of particles along any given line of sight, particle surface characteristics including dielectric compared to metallic properties, and variations of the parameters as a function of distance from the sun.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Apollo 17 Prelim. Sci. Rept.; 3 p
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  • 10
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    Effect of photogrammetric reading error on slope-frequency distributions (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The effect of reading error on two hypothetical slope frequency distributions and two slope frequency distributions from actual lunar data in order to ensure that these errors do not cause excessive overestimates of algebraic standard deviations for the slope frequency distributions. The errors introduced are insignificant when the reading error is small and the slope length is large. A method for correcting the errors in slope frequency distributions is presented and applied to 11 distributions obtained from Apollo 15, 16, and 17 panoramic camera photographs and Apollo 16 metric camera photographs.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.; 9 p
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  • 11
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    Infrared scanning radiometer (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The Apollo 17 infrared scanning radiometer (ISR) experiment for mapping lunar surface thermal emission is reported. The instrument, lunar surface coverage, and the data obtained are discussed.
    Keywords: GEOPHYSICS
    Type: Apollo 17 Prelim. Sci. Rept.; 6 p
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  • 12
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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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  • 13
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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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  • 14
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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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  • 15
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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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  • 16
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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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  • 17
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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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  • 18
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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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  • 19
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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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  • 20
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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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  • 21
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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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  • 22
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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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  • 23
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    Anti-motion-sickness therapy (1973)
    In:  CASI
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    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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  • 24
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    Lunar atmospheric composition experiment (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: On the Apollo 17 mission, a miniature mass spectrometer, called the lunar atmospheric composition experiment (LACE), was carried to the moon as part of the Apollo lunar surface experiments package (ALSEP) to study the composition of and variation in the lunar atmosphere. The instrument was successfully deployed in the Taurus-Littrow valley with its entrance aperture oriented upward to intercept and measure the downward flux of gases at the lunar surface. Initial activation of the LACE instrument occurred on December 27, 1972, approximately 50 hr after sunset, and operation continued throughout the first lunar night. Sunrise brought a high background gas level and necessitated discontinuing operation during lunar daytime except for a brief check near noon. Near sunset, operation was resumed and continued throughout the night. This sequence was repeated for the second and third lunations.
    Keywords: GEOPHYSICS
    Type: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.; 9 p
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  • 25
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    Near-terminator and earthshine photography (1973)
    In:  CASI
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    Publication Date: 2006-01-11
    Description: Photographic results obtained during the Apollo 17 flight for the near terminator and earthshine conditions are discussed. Lunar surface photographs taken in the vicinity of the sunshine terminator provide important information that is not obtained on photographs taken at higher sun evaluation angles. Earthshine photography also provides data on low relief, crater morphology, and small scale structures. Examples of photographs of the lunar surface taken under both conditions are provided.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.; 7 p
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  • 26
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    Atmospheric electricity (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-02
    Description: Atmospheric electricity must be considered in the design, transportation, and operation of aerospace vehicles. The effect of the atmosphere as an insulator and conductor of high voltage electricity, at various atmospheric pressures, must also be considered. The vehicle can be protected as follows: (1) By insuring that all metallic sections are connected by electrical bonding so that the current flow from a lightning stroke is conducted over the skin without any gaps where sparking would occur or current would be carried inside; (2) by protecting buildings and other structures on the ground with a system of lightning rods and wires over the outside to carry the lightning stroke into the ground; (3) by providing a zone of protection for launch complexes; (4) by providing protection devices in critical circuits; (5) by using systems which have no single failure mode; and (6) by appropriate shielding of units sensitive to electromagnetic radiation.
    Keywords: GEOPHYSICS
    Type: Terrest. Environ. (Climatic) Criteria Guidelines for Use in Aerospace Vehicle Develop., 1973 Rev.; 28 p
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  • 27
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    Analysis of the dynamics and frequency spectrum synthesis of an optical-mechanical scanning device (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: A two-coordinate optical-mechanical scanning device (OMSD), the operating unit of which is a scanning disk, with directional and focusing optics and a board, on which the data carrier is placed, is examined. The disk and board are kinematically connected by a transmission mechanism, consisting of a worm and complex gear drive and a tightening screw-nut with correcting device, and it is run by a synchronous type motor. The dynamic errors in the system depend, first, on irregularities in rotation of the disk, fluctuations in its axis and vibrations of the table in the plane parallel to the plane of the disk. The basic sources of the fluctuations referred to above are residual disbalance of the rotor and other rotating masses, the periodic component of the driving torque of the synchronous motor, variability in the resistance, kinematic errors in the drive and other things. The fluctuations can be transmitted to the operating units through the kinematic link as a flexural-torsional system, as well as through vibrations of the housing of the device.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 301-305
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  • 28
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    Experimental research on aerostatic suspensions (1973)
    In:  CASI
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    Publication Date: 2006-03-28
    Description: Suspensions for carrying out experimental investigations, for the purpose of studying a number of problems in dynamics and stability of a suspended cylindrical body at various dynamic loads were investigated in the work. The results of the experimental investigations served as a basis for building a stand with a variable resonator. The experimental stand for suspension of cylindrical object, with a comparatively high natural free vibration frequency in the vertical direction, coinciding with the axis of the suspended object, is distinguished by the possibility of regulating the size of the clearance and is intended for carrying out preliminary experimental studies, for the purpose of selection of optimum aerostatic suspension parameters.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 289-291
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  • 29
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    Measurement of the vibration of structures with a three-component vibration sensor (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: The effects of transverse waves and longitudinal displacements on transverse displacements in a plate are studied using a three component vibration sensor. Limitations of using the sensor in such measurements are: (1) sensor connection to the plate leads to changes in transverse displacement points on the plate surface, (2) the sensor has a finite magnitude of selectivity with respect to vibrations in the direction of the different channel axes, (3) longitudinal displacements of plate surface create restrictions on relative sensitivity of sensor to longitudinal-transverse waves, and (4) tranverse displacement of plate surface during longitudinal wave propagation also creates a restriction on sensor sensitivity to transverse waves.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 190-192
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  • 30
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    Vibrational sensitivity of a measuring instrument and methods of increasing the accuracy of its determinations (1973)
    In:  CASI
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    Publication Date: 2006-03-28
    Description: The properties and peculiarities of two groups of measuring systems reacting to vibrations are discussed. Specifically, results of the action of a three dimensional, cophasal, monoharmonic vibration on the linear system of a measuring instrument was analyzed. Data are also given on the connection between vibration sensitivity and vibration resistance for instruments, methods for estimating vibration resistance, and formulas for expressing test results of vibration resistance. Experimental data are also given for decreasing errors in nonlinear systems during vibrations.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 188-189
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  • 31
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    New principles of construction of electromechanical vibration inducers (1973)
    In:  CASI
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    Publication Date: 2006-03-28
    Description: Electromechanical vibration inducers with high reliability and low noise level were created to study premature operating losses in their support bearings. An investigation was also made of the feasibility of developing stable synchronous operation of two vibrational inducers, rigidily fastened to a solid body with and without flexible suspension.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 176-178
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  • 32
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    The use of correlation receiving systems for detection of noise sources at short distances (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: The use of a directional receiving system to detect noise sources masked by isotropic noise field interference at distances comparable with the distance between the two receivers, was discussed. Wide band noise was also examined. Results indicate the following limitations must be considered when using the method: (1) the system is directional only in the plane of the base, (2) directional power of the system is impaired with a decrease in the bandwidth of the noise source spectrum, (3) the system does not permit unambiguous determination of the direction to noise sources, located on both sides of the base line, and (4) the system has a comparatively low output signal-to-noise ratio.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 171-175
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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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  • 34
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    The use of film actinometry in low intensity ultraviolet irradiation measurement (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: High resolution film was used to measure solar ultraviolet irradiation at a wavelength of 254 nanometers between energy levels of 3 x 10 to the minus 7 power and 130 x 10 to the minus 7 power joules (3 and 130 ergs). The results imply that the film recorded exposure to energy levels from 2.5 to 13 times the expected values. These high values are being evaluated for the influences of other factors that could affect the recorded values.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Johnson Space Center Proc. of the Microbial Response to Space Environ. Symp.; p 155-168
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  • 35
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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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  • 36
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    Background and general design of the microbial response to space environment experiment (M191) system (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: Nine different species of organisms were exposed to space flight conditions during the Apollo 16 mission. Each test system was selected because it provided a quantitative method of evaluating some medically important phenomenon. The experiment design and each of the test systems are discussed.
    Keywords: BIOSCIENCES
    Type: Proc. of the Microbial Response to Space Environ. Symp.; p 3-19
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  • 37
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    Infectivity and egg production of Nematospiroides dubius as affected by space flight and ultraviolet irradiation (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: Nematospiroides dubius was tested to determine the infective potential of the third stage larvae and the egg-production and egg-viability rates of the resulting adults after they are exposed to space flight and solar ultraviolet irradiation. The results are indicative that space-flown larvae exposed to solar ultraviolet irradiation were rendered noninfective in C57 mice, whereas flight control larvae that received no solar ultraviolet irradiation matured at the same rate as the ground control larvae. However, depressed egg viability was evident in the flight control larvae.
    Keywords: BIOSCIENCES
    Type: Proc. of the Microbial Response to Space Environ. Symp.; p 51-64
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  • 38
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    The high energy multicharged particle exposure of the microbial ecology evaluation device on board the Apollo 16 spacecraft (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: The high energy multicharged cosmic-ray-particle exposure of the Microbial Ecology Evaluation Device package on board the Apollo 16 spacecraft was monitored using cellulose nitrate, Lexan polycarbonate, nuclear emulsion, and silver chloride crystal nuclear-track detectors. The results of the analysis of these detectors include the measured particle fluences, the linear energy transfer spectra, and the integral atomic number spectrum of stopping particle density. The linear energy transfer spectrum is used to compute the fractional cell loss in human kidney (T1) cells caused by heavy particles. Because the Microbial Ecology Evaluation Device was better shielded, the high-energy multicharged particle exposure was less than that measured on the crew passive dosimeters.
    Keywords: BIOSCIENCES
    Type: NASA. Johnson Space Center Proc. of the Microbial Response to Space Environ. Symp.; p 179-189
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  • 39
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    Thermoluminescent dosimetry for the Apollo 16 microbial response to space environment experiment (M191) (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: Lithium fluoride thermoluminescent chips were used to provide an integrated dose from the broad spectrum of ionizing radiation to the Microbial Response to Space Environment Experiment (M191). The chips were positioned in the flight hardware to provide data on ionizing radiation within specific volume segments. A uniform radiation dose of 4.8 x 0.001 plus or minus 2 x 0.0001 joule/kg resulted.
    Keywords: BIOSCIENCES
    Type: Proc. of the Microbial Response to Space Environ. Symp.; p 191-197
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  • 40
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    Effect of solar irradiation on extracellular enzymes of Aeromonas proteolytica (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: The bacterium Aeromonas proteolytica was selected for studying the effects of solar irradiation on extracellular enzymes because it produces an endopeptidase that is capable of degrading proteins and a hemolysin that is active in lysing human erythrocytes. Possible alterations in the rate of enzyme production in response to the test conditions are currently underway and are not available for this preliminary report. Completed viability studies are indicative that little difference exists among the survival curves derived for cells exposed to various components of ultraviolet irradiation in space.
    Keywords: BIOSCIENCES
    Type: NASA. Johnson Space Center Proc. of the Microbial Response to Space Environ. Symp.; p 137-151
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  • 41
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    Postflight analyses of Bacillus thuringiensis organisms exposed to space flight conditions (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: Cultures of B. thuringiensis returned from space flight appeared to be normal to slightly affected adversely in their ability to produce three toxins that affect insects. In addition, it can be stated that B. thuringiensis spores are very resistant to ultraviolet irradiation at the individual wavelengths and energy levels previously described. Full sunlight, however, does have a detrimental effect on the viability of B. thuringiensis spores.
    Keywords: BIOSCIENCES
    Type: Proc. of the Microbial Response to Space Environ. Symp.; p 105-120
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  • 42
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    Mycological studies housed in the Apollo 16 microbial ecology evaluation device (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: Survival, death, and phenotype count have yielded variation in the number of fungi recovered from the controls and the flight exposed cuvettes during preliminary analysis of postflight first phase data. Also the preliminary analysis was indicative that fungi exposed to specific space flight conditions demonstrated variable survival rates and phenotype counts. Specific space flight conditions included full light space exposure for Chaetomium globosum, exposure at 300- and 254-nanometer wavelengths for Rhodotorula rubra, full light and 280-nanometer wavelength exposure for Trichophyton terrestre, and 254-nanometer wavelength exposure for Saccharomyces cerevisiae. In general, phenotype counts for flight cuvettes and survival rates for control cuvettes were higher compared with the remaining cuvettes.
    Keywords: BIOSCIENCES
    Type: NASA. Johnson Space Center Proc. of the Microbial Response to Space Environ. Symp.; p 121-135
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  • 43
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    Effects of space vacuum and solar ultraviolet irradiation (254 nanometers) on the colony forming ability of Bacillus subtilis spores (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: Bacillus subtilis spores are highly resistant to harsh environments. Therefore, in the Apollo 16 Microbial Response to Space Environment Experiment (M191), these spores were exposed to space vacuum or solar ultraviolet irradiation, or both, to estimate the change of survival for terrestrial organisms in space. The survival of the spores was determined in terms of colony-forming ability. Comparison of the flight results with results of simulation experiments on earth applying high vacuum or ultraviolet irradiation, or both, revealed no remarkable difference. Simultaneous exposure to both these space factors resulted in a synergistic effect (that is, an ultraviolet supersensitivity). Therefore, the change of survival in space is assumed to depend on the degree of protection against solar ultraviolet irradiation.
    Keywords: BIOSCIENCES
    Type: NASA. Johnson Space Center Proc. of the Microbial Response to Space Environ. Symp.; p 87-103
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  • 44
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    Cuvette loading and unloading procedures (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: The cuvettes for the flight hardware used in the Microbial Response to Space Environment Experiment (M191) were loaded with the biological test systems according to the methods described. After the flight, the experiment package was returned and dismantled. Then, the individual cuvettes were removed from the hardware and unloaded according to the procedures described.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Johnson Space Center Proc. of the Microbial Response to Space Environ. Symp.; p 41-48
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  • 45
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    Description of the microbial ecology evaluation device, flight equipment, and ground transporter (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: Exposure of test systems in space required the fabrication of specialized hardware termed a Microbial Ecology Evaluation Device that had individual test chambers and a complex optical filter system. The characteristics of this device and the manner in which it was deployed in space are described.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Proc. of the Microbial Response to Space Environ. Symp.; p 21-39
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  • 46
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    Fungi and bacteria (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-02
    Description: Spacecraft equipment is usually protected from fungi and bacteria by incorporating a fungicide-bactericide in the material, by a fungicide-bactericide spray, or by reducing the relative humidity to a degree where growth will not take place. A unique method to protect delicate, expensive bearings in equipment was to maintain a pressure (with dry air or nitrogen) slightly above the outside atmosphere (few millibars) within the working parts of the equipment, thus preventing fungi from entering equipment.
    Keywords: BIOSCIENCES
    Type: Terrest. Environ. (Climatic) Criteria Guidelines for Use in Aerospace Vehicle Develop., 1973 Rev.; 2 p
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  • 47
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    Electrical and acoustical resonances of vibrators (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: The basic sources of vibration in electrical machines are identified as: (1) unbalanced masses of the rotor, (2) condition of the bearings, and (3) the electromagnetic field gap. Methods for improving the vibration characteristics of electrical machines are proposed. A mathematical model is developed for calculating the damping elements located between the bearings and the mounts.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 235-238
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  • 48
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    A silicon vidicon camera for slow scan operation (1973)
    In:  CASI
    Details
    Publication Date: 2006-02-22
    Description: A silicon vidicon camera was designed, built, and tested to determine its potential for use aboard future Mariner spacecraft. Slow scan operation is made possible by cooling the vidicon to -40 C. Cooling is achieved by a simple thermal condition path between the vidicon and a radiator mounted on top of the camera head. The camera was successfully operated under simulated space flight conditions and has survived vibration designed to simulate the launch of a Mariner spacecraft. A description of the camera and its operation along with the results of the testing is presented.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: JPL Quart. Tech. Rev., Vol. 3, No. 2 (NASA-CR-133863); p 27-36
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  • 49
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    Brain blood-flow changes during motion sickness (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The possibility of diminished blood flow in the brain is studied as one of the factors resulting from an increase in skeletal muscle blood volume concomitant with other characteristics of motion sickness. Thermistors are implanted in the thalamus of dogs and blood flow changes are recorded while they are subjected to sinusoidal movement on a two pole swing. Results of these initial steps in a proposed long term exploration of different areas of the brain are presented.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 105-107
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  • 50
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    Environmental noise experiment (DTO 71-22) (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Only general conclusions can be reached of the effect of Skylab simulation chamber noise on the crewmen. Two crewmen experienced a small hearing decrement in-chamber, but there was no pattern as to the ear and frequency affected. Temporary hearing threshold shifts were observed in all three crewmen postchamber. These postchamber threshold shifts were perhaps the most significant finding of the study. However, no lasting detrimental effects on the crew's hearing were found.
    Keywords: BIOSCIENCES
    Type: Skylab Med. Expt. Altitude Test (SMEAT); 8 p
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  • 51
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    Sleep-monitoring, experiment M133 (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The Skylab sleep-monitoring experiment simulated the timelines and environment expected during a 56-day Skylab mission. Two crewmembers utilized the data acquisition and analysis hardware, and their sleep characteristics were studied in an online fashion during a number of all night recording sessions. Comparison of the results of online automatic analysis with those of postmission visual data analysis was favorable, confirming the feasibility of obtaining reliable objective information concerning sleep characteristics during the Skylab missions. One crewmember exhibited definite changes in certain sleep characteristics (e.g., increased sleep latency, increased time Awake during first third of night, and decreased total sleep time) during the mission.
    Keywords: BIOSCIENCES
    Type: NASA. Johnson Space Center Skylab Med. Expt. Altitude Test (SMEAT); 21 p
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  • 52
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    Metabolic activity, experiment M171 (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The Skylab metabolic activity experiment determines if man's metabolic effectiveness in doing mechanical work is progressively altered by a simulated Skylab environment, including environmental factors such as slightly increased pCO2. This test identified several hardware/procedural anomalies. The most important of these were: (1) the metabolic analyzer measured carbon dioxide production and expired water too high; (2) the ergometer load module failed under continuous high workload conditions; (3) a higher than desirable number of erroneous blood pressure measurements were recorded; (4) vital capacity measurements were unreliable; and (5) anticipated crew personal exercise needs to be more structured.
    Keywords: BIOSCIENCES
    Type: Skylab Med. Expt. Altitude Test (SMEAT); 15 p
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  • 53
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    Mineral balance, experiment M071 (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Concern for the long term metabolic consequences of weightless flight was the basis for the conception of the Skylab medical experiment to measure mineral balance. Proper interpretation of obtained data that diminished atmospheric pressure has no appreciable effect, or at least no protective effect, on calcium metabolism. The absence of changes in calcium metabolism indicates that a stable baseline observation has been made for Skylab as far as the effects of atmosphere or calcium metabolism are concerned.
    Keywords: BIOSCIENCES
    Type: Skylab Med. Expt. Altitude Test (SMEAT); 12 p
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  • 54
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    Lower body negative pressure, experiment M092 (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Evaluation of orthostatic intolerance has been achieved by the use of lower body negative pressure (LBNP). The LBNP technique, though independent of gravity, simulates its effect by exposing the legs and the lower abdomen to reduced ambient pressures. This LBNP experiment, conducted during the 56-day simulation of the Skylab environment, was designed to supply baseline information on cardiovascular responses to periodic orthostatic stress. Impaired orthostatic tolerance, manifested by the increased heart rate, diminished systolic and pulse pressure, and increased tendency to syncope in the upright position, or during LBNP, was not observed in this experiment.
    Keywords: BIOSCIENCES
    Type: Skylab Med. Expt. Altitude Test (SMEAT); 6 p
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  • 55
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    Vestibular mechanisms underlying certain problems in a rotating spacecraft (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Vestibular side effects are discussed with the aid of a conceptual framework based on an analysis of vestibular input-output relations. These side effects tend to fall into two main categories: (1) Reflex phenomena, and (2) motion sickness, a delayed epiphenomenon. Although the symptomatology of motion sickness is similar wherever experienced, both the eliciting stimuli and the opportunity to adapt may differ in different motion environments. These differences not only are exemplified when motion sickness is compared in a weightless and in a rotating environment, but they also point to important differences in the problem of preventing (or treating) motion sickness in these two very different environments.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 35-39
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  • 56
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    Solar corona photography (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: An analysis was made of Apollo 17 solar corona photographs in an effort to identify coronal streamers observed from earth. The photographs corroborate earth based observations; moreover, visual observations made by the Apollo crew indicate clearly identifiable streamers which extend to approximately 100 solar radii.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Apollo 17 Prelim. Sci. Rept.; 3 p
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  • 57
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    Apollo 17 laser altimeter (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The performance and operation of the Apollo 17 laser altimeter after several modifications are discussed. Functions of the instrument include precise altitude measurement of the CSM above the lunar surface, and measurement of broad scale topographic relief around the entire circumference of the moon.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Apollo 17 Prelim. Sci. Rept.; 4 p
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  • 58
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    Repeatability of elevation measurements: Apollo photography (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Sun elevation angle effects on repeatability, using Apollo 15 photographs are analyzed and results extended to slope related effects. Preliminary results indicate repeatibility of elevation measurement is related to contrast in the stereoscopic image.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.; 6 p
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  • 59
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    Photographic summary (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The photographic objectives of the Apollo 17 mission are discussed. The photographic requirements are divided into lunar surface photographs and orbital photographic tasks. The cameras used during the mission are listed and a general description of the tasks for which each was used is provided. Examples of photographs taken during lunar orbit and on the lunar surface are included. The cameras used and the photographic coverage obtained during specific phases of the mission are reported.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Apollo 17 Prelim. Sci. Rept.; 32 p
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  • 60
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    Red blood cell metabolism (M114), part D (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Statistically significant differences were found between Skylab simulation crews and controls for glycolytic enzymes. The absence of simultaneous controls for the pre- and postchamber analyses leaves the significance of the findings in the crew during these periods indeterminate.
    Keywords: BIOSCIENCES
    Type: NASA. Johnson Space Center Skylab Med. Expt. Altitude Test (SMEAT); 2 p
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  • 61
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    Special hematologic effects (M115), part E (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: All routine hematological measurements for the Skylab simulation test were within normal astronaut population limits for the CDR, SPT, and PLT, with one exception: A significant lymphopenia was observed in the PLT during the post test period, possibly the reflection of increased adrenal corticoid secretion. No ultrastructural red cell membrane abnormalities were observed in any of the subjects, nor were any red corpuscle morphological abnormalities noted. Slight elevations in the PLT's red corpuscular potassium were observed in the younger corpuscles after chamber entrance and again upon egress. This probably represents newly released young red cells from hematopoietic tissue. Flame photometric analyses confirm the fact that potassium is indeed higher in the younger cells of all subjects examined.
    Keywords: BIOSCIENCES
    Type: Skylab Med. Expt. Altitude Test (SMEAT); 12 p
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  • 62
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    Investigation of man's immune system (M112), part B (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Fifty-six days of residence in a Skylab-type environment produce essentially no change in the reactivity of the human immune system, as typified by the rate of RNA or DNA synthesis in small lymphocytes. The one point of divergence between the Skylab simulation crew and previous Apollo crews, a marked depression in synthesis rates on the fourteenth day after the chamber study, may be due to some technical difficulty in the experiment. Lymphocyte morphology changes paralleled functional changes.
    Keywords: BIOSCIENCES
    Type: NASA. Johnson Space Center Skylab Med. Expt. Altitude Test (SMEAT); 6 p
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  • 63
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    Hematology/immunology (M110 series) (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The hematology/immunology experiments in the Skylab mission study various aspects of the red blood cell, including its metabolism and life span, and blood volume changes under zero gravity conditions to determine the precise mechanism of the transient changes which have been seen on the relatively brief missions of the past.
    Keywords: BIOSCIENCES
    Type: Skylab Med. Expt. Altitude Test (SMEAT); 5 p
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  • 64
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    The role of perilymph in the response of the semicircular canals to angular acceleration (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: A new model for the response of the semicircular canals to angular motion is postulated. This model is based on evidence that the bony canal is not compartmentalized and assumes that the ampulla wall is highly flexible. It is shown that the perilymph induces a cupula displacement far greater than that produced by the endolymph alone. The predicted dynamic behavior of the canals on the basis of this model is found to be consistent with experimental observations.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 135-141
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  • 65
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    The vestibular system of the owl (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Five owls were given vestibular examinations, and two of them were sacrificed to provide serial histological sections of the temporal bones. The owls exhibited a curious variability in the postrotatory head nystagmus following abrupt deceleration; sometimes a brisk nystagnus with direction opposite to that appropriate to the stimulus would occur promptly after deceleration. It was found also that owls can exhibit a remarkable head stability during angular movement of the body about any axis passing through the skull. The vestibular apparatus in the owl is larger than in man, and a prominent crista neglecta is present. The tectorial membrane, the cupula, and the otolithic membranes of the utricle, saccule, and lagena are all attached to surfaces in addition to the surfaces hearing hair cells. These attachments are very substantial in the utricular otolithic membrane and in the cupula.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Fifth Symp. on the Role of the Vestibular Organs in Space Exploration; p 127-132
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  • 66
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    Medical operations: Crew surgeon's report (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: To assure the safety and well being of the Skylab environment simulation crewmembers it was necessary to develop a medical safety plan with emergency procedures. All medical and nonmedical test and operations personnel, except those specifically exempted, were required to meet the medical standards and proficiency levels as established. Implemented programs included health care of the test crew and their families, occupational medical services for chamber operating personnel, clinical laboratory support and hypobaric and other emergency support.
    Keywords: BIOSCIENCES
    Type: Skylab Med. Expt. Altitude Test (SMEAT); 15 p
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    Effects of SMEAT on the oral health of crewmen (DTO 71-2) (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The oral health status of three astronauts was monitored before, during and after a 56-day simulation of the Skylab mission. Laboratory and clinical parameters which are considered to be ultimately related to dental impairments were evaluated. The most notable changes were observed in increased counts of mycoplasma and S. mutans, decreased counts of enteric bacilli, decreased saliva flow rates, increased secretory IgA and salivary lysozyme levels, and increased clinical scores of dental plaque, calculus and inflammation.
    Keywords: BIOSCIENCES
    Type: NASA. Johnson Space Center Skylab Med. Expt. Altitude Test (SMEAT); 6 p
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  • 68
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    Bioassay of body fluids, experiment M073 (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Body fluids were assayed in this experiment to demonstrate changes which might have occurred during the 56-day chamber study in fluid and electrolyte balance, in regulation of calcium metabolism, in overall physiological and emotional adaptation to the environment, and in regulation of metabolic processes.
    Keywords: BIOSCIENCES
    Type: Skylab Med. Expt. Altitude Test (SMEAT); 14 p
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  • 69
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    Bone mineral measurement, experiment M078 (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Measurement tests revealed few deviations from baseline bone mineral measurements after 56 days in a Skylab-type environment. No mineral change was observed in the right radius. One individual, however, showed a possible mineral loss in the left os calcis and another gained mineral in the right ulna. The cause of the gain is unclear but may be attributable to the heavy exercise routines engaged in by the crewmember in question. Equipment problems were identified during the experiment and rectified.
    Keywords: BIOSCIENCES
    Type: Skylab Med. Expt. Altitude Test (SMEAT); 6 p
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    Blood volume and red cell life span (M113), part C (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Prechamber, in-chamber, and postchamber blood samples taken from Skylab simulation crewmembers did not indicate significant shortening of the red cell life span during the mission. This does not suggest that the space simulation environment could not be associated with red cell enzyme changes. It does show that any changes in enzymes were not sufficiently great to significantly shorten red cell survival. There was no evidence of bone marrow erythropoetic suppression nor was there any evidence of increased red cell destruction.
    Keywords: BIOSCIENCES
    Type: NASA. Johnson Space Center Skylab Med. Expt. Altitude Test (SMEAT); 4 p
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  • 71
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    Cytogenetic studies of the blood (M111), part A (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The cytogenetic study of the crew appears to indicate that Skylab-type environmental conditions have no deleterious effect upon chromosomal material. The findings are, however, less clear-cut than might be desired, due in large measure to confounding of the experimental design by the administration of isotope injections for the purposes of other experiments and to the lack of control subjects.
    Keywords: BIOSCIENCES
    Type: NASA. Johnson Space Center Skylab Med. Altitude Test (SMEAT); 3 p
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  • 72
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    Program organization (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The Skylab medical experiments altitude test plan is outlined. Described are the scope and objectives of the program, the management system under which it would be conducted, requirements for configuration of the test facility, test control documentation, data processing, and detailed test objectives.
    Keywords: BIOSCIENCES
    Type: Skylab Med. Expt. Altitude Test (SMEAT); 5 p
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  • 73
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    Introduction (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The objective of the Skylab medical experiment altitude test was to provide a nearly full scale simulation of a 56-day Skylab mission for studying physiological changes produced in man by the long term exposure to space conditions. Evaluated in the altitude chamber tests were human cardiovascular/hemodynamic responses, musculoskeletal/metabolic effects, endocrine/electrode factors, and neurophysiological indices.
    Keywords: BIOSCIENCES
    Type: Skylab Med. Expt. Altitude Test (SMEAT); 6 p
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  • 74
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    Atmospheric attenuation relative to earth-viewing orbital sensors (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-02
    Description: Earth viewing space missions offer exciting new possibilities in several earth resources disciplines - geography, hydrology, agriculture, geology, and oceanography, to name a few. A most useful tool in planning experiments and applying space technology to earth observation is a statistical description of atmospheric parameters. Four dimensional atmospheric models and a world wide cloud model are used to produce atmospheric attenuation models to predict degradation effects for all classes of sensors for application to earth sensing experiments from spaceborne platforms. To insure maximum utility and application of these products, the development of an interaction model of microwave energy and atmospheric variables provides a complete description of the effects of atmospheric moisture upon microwaves.
    Keywords: GEOPHYSICS
    Type: Terrest. Environ. (Climatic) Criteria Guidelines for Use in Aerospace Vehicle Develop., 1973 Rev.; 21 p
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  • 75
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    Identification of a mechanical vibration system (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: The actual values of the parameters of a precision instrument assembly vibration system are determined according to experimental amplitude-frequency characteristics. The assembly is considered as a complex mechanical vibrating system, consisting of elements with concentrated and distributed parameters. A calculation procedure was compiled.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 36-37
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  • 76
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    Construction of a mathematical model of the human body, taking the nonlinear rigidity of the spine into account (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: A mathematical model of the human body was constructed, under the action of harmonic vibrations, in the 2.5-7 Hz frequency range. In this frequency range, the model of the human body as a vibrating system, with concentrated parameters is considered. Vertical movements of the seat and vertical components of vibrations of the human body are investigated.
    Keywords: BIOSCIENCES
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 38-40
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  • 77
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    Automatic measuring device for octave analysis of noise (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: An automatic decoder is described that counts noise levels by pulse counters and forms audio signals proportional in duration to the total or to one of the octave noise levels. Automatic ten fold repetition of the measurement cycle is provided at each measurement point before the transition to a new point is made.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 25-27
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  • 78
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    Use of the mathematical modelling method for the investigation of dynamic characteristics of acoustical measuring instruments (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: The schematic diagram of a noise measuring device is presented that uses pulse expansion modeling according to the peak or any other measured values, to obtain instrument readings at a very low noise error.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 10-12
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  • 79
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    System for automated measurement of full-scale noises and vibrations (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: On-line devices are described for measuring the electrical spectrum of a signal in the presence of full scale noise and vibrations. The system includes a set of parallel filters with detectors at the filtration channel outlet. A reciprocal spectral density matrix is used to process the information contained in the interacting signals from various noise and vibration sources.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 3-6
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  • 80
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    Multiple-point unit for remote automatic spectral analysis (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: An experimental model of a mechanical spectrometer is reported that permits vibration measurements at 297 points on a mechanical device and processes this information by digital computer for automatic printout.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 1-2
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  • 81
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    Photogrammetric evaluation of Mariner 9 photography (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-27
    Description: Some attempts to produce, with an AP/C analytical plotter, stereo models using Mariner 9 pictures are reported. The first attempt using geometrically uncorrected mission test video system (MTVS) imagery failed; the second, using corrected reduced data record (RDR) pictures also failed, probably because they were reconstructed through a vidicon display which introduces additional distortion. By using images obtained from RDR tape data through the Optronics Photowrite device, models were successfully obtained.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: JPL Mariner Mars 1971 Proj., Vol. 4; p 587-592
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  • 82
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    Mariner 9 ultraviolet spectrometer experiment: Mars atomic oxygen 1304-Angstrom emission (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-27
    Description: Selected results are presented for a considerable quantity of Mariner 9 1304-A data for the first 100 revolutions from both the bright limb and disk of Mars. The limb data suggest that the exospheric temperature is less than it was in 1969 when Mariners 6 and 7 encountered the planet. Similar (O) concentrations (0.5 to 1%) are derived for a temperature of about 300 K. Structure in the limb profiles below 200 km suggests the possibility that about 0.2 kR of the observed approximately 0.8 kR near 150 km is due to dissociative excitation of CO2. Significant differences in selected limb profiles suggest that local as well as random variations in (O) occur.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: JPL Mariner Mars 1971 Proj., Vol. 4; p 355-368
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  • 83
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    Mariner 9 ultraviolet spectrometer experiment: Seasonal variation of ozone on Mars (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-27
    Description: On Mars, the Mariner observations show a twenty-fold variation in the amount of ozone, depending on the presence or absence of another minor constituent, water vapor, in the atmosphere. In the evolution of earth's primitive atmosphere, the formation of an ozone layer may have played an important role in the prebiotic chemistry that took place on the surface. The seasonal formation and disappearance of ozone in the contemporary Martian atmosphere may be of consequence in any prebiotic chemistry that may be occurring there.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: JPL Mariner Mars 1971 Proj., Vol. 4; p 369-372
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  • 84
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    The origin of intermediate and deep focus earthquakes (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: An elastic plate model is used to describe the origin of intermediate and deep earthquakes. It is shown that the earth is covered by about eight tectonic plates that have relative motions; along plate boundary lines, one plate thrusting under the other, causes deflection and buckling of the elastic plate structure in regions of maximum curvature that may trigger earthquakes.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 220-223
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  • 85
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    Polar motion (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: Tracking of the Beacon Explorer-C satellite by a precision laser system was used to measure the polar motion and solid earth tide. The tidal perturbation of satellite latitude is plotted as variation in maximum latitude in seconds of arc on earth's surface as a function of the date, and polar motion is shown by plotting the variation in latitude of the laser in seconds of arc along the earth's surface as a function of date
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 216-219
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  • 86
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    A detailed gravimetric geoid of North America, the North Atlantic, Eurasia, and Australia (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: A computer program was developed for the calculation of a goid based upon a combination of satellite and surface gravity data. A detailed gravimetric geoid of North America, the North Atlantic, Eurasia, and Australia was derived by using this program.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 212-215
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  • 87
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    Earth physics, overview (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: Satellite applications in earth and ocean dynamic studies are considered for: earthquake hazard assessment and alleviation; prediction of general ocean circulation, surface currents, and heat transport; monitoring of transient phenomena of the ocean surface, such as sea state and wave conditions, wind-surface interactions and storm searches; and refinement of the global geoid, the gravity and magnetic fields of the earth.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 211
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  • 88
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    Tides in the upper atmosphere: A controversy resolved? (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: Diurnal temperature variations in the upper atmosphere are caused by heating resulting from the absorption of solar energy by ozone near the stratopause and by water vapor in the troposphere. Theoretical temperature variations given as a function of time and height show a discrepancy for the maximum temperature variation. A comprehensive set of acoustic grande soundings establish phase changes with altitude in agreement with the theory although times of maximum and minimum are not aligned at all altitudes.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 205-208
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  • 89
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    Effects of the atmosphere on ERTS observations (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: Atmospheric radiation models and methods of computing radiation effects are reported that are important both in the meteorological and Earth Resources Satellite programs. Results of using them to compute the atmospheric effects on just the ERTS observations are presented.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 193-195
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  • 90
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    Satellite observations during the rapid intensification of hurricane Camille (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: Medium resolution infrared radiometer observations at the 6.7 micrometer and the 11 micrometer regions by satellite during the maximum intensification phase of hurricane Camille show increasing black body temperatures near the center. This is attributed to increased upward vertical motion in the interior of the cyclone, which is an indication of rapid intensification.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 196-200
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  • 91
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    Oceanic turbidity and chlorophyll as inferred from ERTS-1 observations (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: Spectral signatures of phytoplankton and other obscuring effects are considered in order to determine how to best use satellite data. The results of this study were then used to analyze the spectral data obtained from the ERTS-1 multispectral scanner (MSS). The analyzed satellite data were finally compared with surface ship measurements of chlorophyll concentration. It was found that the effects of water turbidity on the multispectral imagery can be discriminated by rationing the two shortest wavelength channels so that the effect of phytoplankton is enhanced.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 190-192
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  • 92
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    Remote sensing of sea ice motion (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: Remote sensing by ERTS-1 provides overlapping coverage on sequential days of dynamic changes in Arctic Sea ice and allows for route planning of shipping in the polar region.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 182-186
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  • 93
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    Passive microwave images of lake ice (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: Photographic data and microwave emission images from the Great Lake ice formation are compared for their applicability to commercial shipping interests. A synoptic view of the microwave radiation from the lake area ice shows a large variation in brightness temperature. The snow ice appears to have the highest microwave brightness temperatures, whereas the thick clear ice shows up some 30 degrees kelvin colder, and the thin clear ice is colder still with a 1.55 cm radiation.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Significant Accomplishments in Sci.; p 187-189
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  • 94
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    Polar mapping with ERTS-1 (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: The applicability of multispectral ERTS-1 imagery to polar ice detection, local current effects, map corrections, relative lake depth measurements, and estimates of ice breakup is discussed.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 178-181
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  • 95
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    Earth observations, overview (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: An overview is given of research and development activities at the Laboratory for Meteorology and Earth Sciences. Highlights of satellite techniques in earth observation missions and projects are outlined, as are remote sensing methods by aircraft overflights; most noteworthy among these is the development of multispectral scanners that monitor both the reflected infrared solar radiation and the emitted terrestrial radiation. The application of observations to the survey of environmental conditions and resource management is emphasized.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 161-177
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  • 96
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    A new method of measurement of tension on a moving magnetic tape (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: The possibility of no-contact measurement of the tension on a moving magnetic tape, assuming the tape is uniform, is discussed. A scheme for calculation of the natural frequency of transverse vibrations of magnetic tape is shown. Mathematical models are developed to show the relationships of the parameters. The method is applicable to the analysis of accurate tape feed mechanisms design.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 229-231
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  • 97
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    Method of accounting for instrumental distortions during observation of signals (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: A method is proposed for accounting for instrumental distortions in linear systems with known dynamic characteristics.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 193-194
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  • 98
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    Attitude control of a spinning flexible spacecraft (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The dynamics of rotational motion of a spinning orbiting spacecraft consisting of two rigid bodies connected by a flexible joint and arbitrary number of flexible appendages (two of which are flexible massless booms having masses on their tips) is analyzed. Active attitude control is provided by momentum exchange devices (e.g. control moment gyroscopes) or a mass expulsion system. The linearized equations of motion describing the vehicle are presented, and a large scale digital simulation that has been developed at the Marshall Space Flight Center is presented. A simplified model of the geometrically complex vehicle is selected to make it analytically tractable. The simplified model consists of a single rigid core body with two attached flexible massless booms having tip masses. The states of the vehicle are defined as small perturbations about its steady-state spin. An analysis is performed to determine the domain of stability.
    Keywords: SPACE VEHICLES
    Type: Computer and Electrical Engineering; 1; Dec. 197
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  • 99
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    Low frost-point humidity generator (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: A low frost-point humidity generator has been developed at NBS to provide a capability for calibration, testing, and research at very low levels of water vapor content in such gases as atmospheric air, carbon dioxide and nitrogen. The generator produces frost points from -30 to -100 C at ambient pressures from 500 to 200,000 pascals (0.005 to 2 atm.). This is equivalent to mixing ratios of 4 micrograms to 51 grams of water vapor per kilogram of dry air and to vapor pressures of .0014 to 38 pascals. The generated test gas can be fed to a test chamber with independent temperature control between +25 and -100 C. The uncertainty of the frost point in the test chamber is estimated not to exceed 0.05 deg C.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Journal of Research; vol. 77A
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  • 100
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    A centre for accommodative vergence motor control (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Latencies in accommodation, accommodative-vergence, and pupil-diameter responses to changing accommodation stimuli, as well as latencies in pupil response to light-intensity changes were measured. From the information obtained, a block diagram has been derived that uses the least number of blocks for representing the accommodation, accommodative-vergence, and pupil systems. The signal transmission delays over the various circuits of the model have been determined and compared to known experimental physiological-delay data. The results suggest the existence of a motor center that controls the accommodative vergence and is completely independent of the accommodation system.
    Keywords: BIOSCIENCES
    Type: Vision Research; 13; Dec. 197
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