Infrared spectroscopy
Infrared spectroscopic measurements on Mars atmosphere by Mariners 6 and 7
Herr, K. C.↗
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Infrared absorptions near three microns recorded over the polar cap of Mars.
IR spectrometer on Mariner 7 Mars flyby recording sharp absorption near 3 microns at Martian southern polar cap
Herr, K. C.↗
Use of Coles' universal wake function for compressible turbulent boundary layers
Compressible turbulent boundary layers velocity profiles, Coles universal wake function, least squares methods, wake-wall representation, etc
Childs, M. E.↗
An evaluation of approximations used in the analysis of chemically reacting, stagnation- point boundary layers with wall injection
Chemically reacting stagnation point boundary layers with wall injection of gas, comparing multicomponent solution with binary approximation and chemical simplifications
Craig, R. A.↗
Durable cathodes for high-power inert-gas arcs
Cathode design minimizes evaporation of electrode material which may deposit on associated optical surfaces. It also results in stable operation and precise positioning of arc relative to optical collector. Innovation applies to high power light sources and to arcs used in industrial furnaces.
Decker, A. J.↗
Stratospheric warming observed by Nimbus 4
Nimbus 4 satellite selective chopper radiometer data on IR radiation emitted by carbon dioxide, considering stratospheric warming
Barnett, J. J.↗
180-day life test of solid electrolyte system for oxygen regeneration
Closed-loop solid electrolyte oxygen regeneration life support system, discussing 180-day life test
Elikan, L.↗
Vertical motions of the midlatitude F2 layer during magnetospheric substorms.
Use of ground-based ionosonde records from midlatitude stations during winter nights to study vertical motions of the F2 layer associated with magnetospheric substorms. The results show that during substorms the F2 layer is lifted upward in the premidnight sector and pushed downward in the postmidnight sector. These motions are interpreted in terms of E x B drifts, the electric field being eastward on the eveningside and westward on the morningside. The results emphasize the importance of substorm effects on the midlatitude F region and the potential of ground-based hf sounding techniques in studying magnetospheric substorms.
Park, C. G.↗
Dynamic analysis of large structures by modal synthesis techniques.
Several criteria that may be used to evaluate the merits of some of the existing techniques for the dynamic analysis of large structures which involve division into substructures or components are examined. These techniques make use of component displacement modes to synthetize global systems of generalized coordinates and, for that reason, they have come to be known as modal synthesis or component mode methods. Two techniques have been found to be particularly useful - i.e., the modal synthesis method with fixed attachment modes, and the modal synthesis method with free attachment modes. These two methods are treated in detail, and general flow charts are presented for guidance in computer programming.
Hurty, W. C.↗
The composition of the Martian atmosphere - Minor constituents.
The Mariner 6 and 7 infrared spectrometers provided data which, in principle, determine upper limits on the possible atmospheric abundance of every gaseous substance that was undetected but which has recognized absorptions in the accessible spectral region, 1.9 to 14.4 microns. Through supporting laboratory determinations of curves of growth under pressure-broadening conditions appropriate to Mars, upper limits can be specified (expressed first in cm-atm, STP, for a vertical column and then in parts per million) for NO2, NH3, C3O2, SO2, OCS, NO, O3, CH4, N2O, HCL, HBr, and H2S. In addition, considerations of band contours, moments of inertia, and experimental absorption coefficients make it possible to place useful upper limits on 27 additional substances that were not detected and for which curves of growth have not been measured.
Horn, D.↗
Development of a standardized battery of performance tests for the assessment of noise stress effects
A set of 36 relatively independent categories of human performance were identified. These categories encompass human performance in the cognitive, perceptual, and psychomotor areas, and include diagnostic measures and sensitive performance metrics. Then a prototype standardized test battery was constructed, and research was conducted to obtain information on the sensitivity of the tests to stress, the sensitivity of selected categories of performance degradation, the time course of stress effects on each of the selected tests, and the learning curves associated with each test. A research project utilizing a three factor partially repeated analysis of covariance design was conducted in which 60 male subjects were exposed to variations in noise level and quality during performance testing. Effects of randomly intermittent noise on performance of the reaction time tests were observed, but most of the other performance tests showed consistent stability. The results of 14 analyses of covariance of the data taken from the performance of the 60 subjects on the prototype standardized test battery provided information which will enable the final development and test of a standardized test battery and the associated development of differential sensitivity metrics and diagnostic classificatory system.
Theologus, G. C.↗
Data collection platform/field test set program
There are no author-identified significant results in this report.
Vannostrand, G. C.↗
The core paradox.
Rebuttal of suggestions from various critics attempting to provide an escape from the seeming paradox originated by Higgins and Kennedy's (1971) proposed possibility that the liquid in the outer core was thermally stably stratified and that this stratification might prove a powerful inhibitor to circulation of the outer core fluid of the kind postulated for the generation of the earth's magnetic field. These suggestions are examined and shown to provide no reasonable escape from the core paradox.
Kennedy, G. C.↗
Perturbing aspects of the companions of Barnard's star.
Discussion of the salient characteristics of the planetary system constituted by Barnard's star and its companions, which represent the only multiplanet system other than our own so far positively identified. It is shown to differ significantly in structure from the solar system, and the possible cosmogonic implications of these differences are considered.
Black, D. C.↗
Concerning the planetary system of Barnard's Star.
Reanalyzed data pertaining to the proper motion of Barnard's Star indicate that at least two dark companions are required to explain the observations. It is found that the orbits of the two companions are not coplanar, but have a relative inclination of nearly 50 deg.
Black, D. C.↗
A stochastic model of the electromyogram
The quantitative regularities of interference pattern formation by motor unit action potentials is investigated. The parameters of a single motor unit and how they relate to the Fourier transform analysis of an EMG are considered. The Fourier transform of the simulated electromyogram is compared with the Fourier transform of the actual EMG recorded from various human muscles using surface electrodes.
Agarwal, G. C.↗
Effects of low frequency vibration of a limb
Low frequency oscillations were applied on the ankle joint in plantarflexion/dorsiflexion rotation using a torque motor. The torque, the angular rotation and the evoked electromyogram from the gastronemius soleus and the anterior tibial muscles were recorded. Significant nonlinearities were observed in the angular rotation from 8 to 12 Hz. The following methods are used for data analysis: (1) Two cycle averaged response; (2) Fourier transform; and (3) Fourier analysis at the driving frequency. Important observations are: (1) resonance near 6 to 8 Hz; (2) slowly increasing amplitudes of oscillation near resonance; (3) self sustaining oscillations after the motor is turned off, particularly in the fatigued limb; and (4) distortion of angular rotation during which there are spontaneous recurrences of oscillation at the driving frequency.
Agarwal, G. C.↗
A lunar core and the moon's magnetic field
The suggestion that the moon's magnetic field is due to adiabatic magnetohydrodynamic convection of a molten core has been made by a number of recent authors. Considerations based on petrology, mass and rotational inertia limit the size of this hypothetical core to a few hundred kilometers at the most. A proposal has been made that this core is either molten iron or iron sulfide. The properties are known of both molten iron and iron-sulfide at lunar core pressures. No way can be found to maintain circulation in a hypothetical lunar core, as circulation is contingent upon a temperature gradient being greater than the adiabatic gradient, or an internal heat source.
Kennedy, G. C.↗