Finding the initial internal states of the inverse automaton by examining the operation of the original automaton
Determining initial states of inverse automaton by analysis of original automaton
Kurmit, A. A.↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Generalized Rayleigh methods with applications to finding eigenvalues of large matrices
Generalized Rayleigh quotients for calculating eigenvalues and eigenvectors of large matrices
Vandergraft, J. S.↗
Technology in retrospect and critical events in science - A summary and critique of findings by IIT
Critical research events and time histories in development of innovations
Franck, P. G.↗
The process of problem finding
Managerial practices of problem identification, discussing research study in operating division of large corporation
Pounds, W. F.↗
Laser velocimeter used to find transition region
Laser velocimeter application to laminar-turbulent flow transition at glass tube centerline
Mckinney, B. G.↗
Some findings on water vapor nucleation in spacecraft debris clouds
Water vapor homogeneous nucleation in simulated spacecraft debris clouds
Reid, N. M.↗
A NASAP-adaptable algorithm for finding higher order loops of a flowgraph
Algorithm for higher order loops determination in flow graph from subgraphs of linear graph model, considering circuits with ladder/nonladder structures
Bedrosian, S. D.↗
Electron beam as a method of finding the potential distribution in a cylindrically symmetric plasma
Electron beam for determining plasma potential and charge density as function of radius of inertially confined tenuous plasma cylinder
Stallings, C. H.↗
Experimental interstellar organic chemistry: Preliminary findings
In a simulation of interstellar organic chemistry in dense interstellar clouds or on grain surfaces, formaldehyde, water vapor, ammonia and ethane are deposited on a quartz cold finger and ultraviolet-irradiated in high vacuum at 77K. The HCHO photolytic pathway which produces an aldehyde radical and a superthermal hydrogen atom initiates solid phase chain reactions leading to a range of new compounds, including methanol, ethanol, acetaldehyde, acetonitrile, acetone, methyl formate, and possibly formic acid. Higher nitriles are anticipated. Genetic relations among these interstellar organic molecules (e.g., the Cannizzaro and Tischenko reactions) must exist. Some of them, rather than being synthesized from smaller molecules, may be degradation products of larger organic molecules, such as hexamethylene tetramine, which are candidate consitituents of the interstellar grains. The experiments reported here may also be relevant to cometary chemistry.
Khare, B. N.↗
Neurophysiological findings relevant to echolocation in marine animals
A review of echolocation mechanisms in marine mammals, chiefly porpoises, is given. Data cover peripheral auditory and central neurophysiological specializations favorable to the analysis of echolocating clicks and their echoes. Conclusions show (1) signals are received from 50 up to at least 135 kHz, (2) sound is received through the mandible skin, and (3) the midbrain sites are insensitive to low frequencies (below 6 kHz).
Bullock, T. H.↗
Experimental findings from zero-tank net positive suction head operation of the J-2 hydrogen pump
The results of a series of liquid hydrogen turbopump tests to demonstrate the feasibility of zero-tank net positive suction head are presented. A J-2 engine hydrogen pump and S-IVB stage fuel feed system were used for this investigation. The pump was operated at flows and speeds equivalent to normal J-2 engine operating conditions and at hydrogen bulk temperatures between 39 and 45 R. These tests show zero-tank not positive suction head to be a realistic operating mode that should be considered for future applications.
Stinson, H. P.↗
Biomedical findings on American astronauts participating in space missions.
Zero-gravity adaptive responses of man are discussed on the basis of biomedical data for 54 American astronauts, covering performance, locomotion, orientation, sleep and physiological and functional characteristics. Figures and diagrams are given for cardiovascular adaptation, weight loss, endocrine and electrolyte responses, fluid balance, skeletal responses, muscular and neuromuscular changes, exercise response tests and work capacity indicators. A review is given of current hypotheses concerning the processes involved in human adaptation to zero gravity. It is concluded that the immediate response of the body to weightlessness is a redistribution of the total circulating blood volume, leading to a loss of water, sodium and potassium through the kidneys and, thus, to a loss in total body weight.
Berry, C. A.↗
A new algorithm for finding survival coefficients employed in reliability equations
Product reliabilities are predicted from past failure rates and reasonable estimate of future failure rates. Algorithm is used to calculate probability that product will function correctly. Algorithm sums the probabilities of each survival pattern and number of permutations for that pattern, over all possible ways in which product can survive.
Bouricius, W. G.↗
Findings on American astronauts bearing on the issue of artificial gravity for future manned space vehicles.
Explore the source record for details and available documents.
Berry, C. A.↗
A finding list of faint UV-bright stars in the galactic plane.
Explore the source record for details and available documents.
Lanning, H. H.↗
Finding the earth in ERTS
Itek's Optical System Division recently completed an investigation funded by NASA to develop interpretation methods and algorithms suitable for recognition of earth resources by machines using multispectral data from ERTS. Through the algorithms developed (and described here) it is now possible to automatically recognize terrain types. The clustering algorithm guarantees high accuracy in the recognition process with almost complete automation. Interestingly, the machine recognition seems to be more accurate than a human photointerpreter who has been restricted to using only ERTS-1 color composites. That is, machine recognition appears to be more sensitive, it can operate much closer, to the resolution limit of the ERTS-1 imagery than the human photointerpreter.
Gramenopoulos, N.↗
The magnetosphere of Jupiter as observed with Pioneer 10. I - Instrument and principal findings
Description of the first in situ observations of energetic electrons of energy greater than 0.06 MeV in the magnetosphere of Jupiter during November-December 1973. The outer magnetosphere has the form of a thin disklike quasi-trapping region extending from about 20 to over 100 Jovian radii. This magnetodisk is confined near the magnetic equatorial plane and has approximate axial symmetry about the magnetic axis of the planet. The observations inside a radial distance of 12 Jovian radii are well organized by a centered dipolar model of the planet's magnetic field with a tilt of 9.5 plus or minus 0.5 deg to the rotational axis and with pole at a system III longitude of 230 plus or minus 3 deg. Absolute omnidirectional intensities of electrons within the stable trapping region inside 20 Jovian radii are given for five energy ranges greater than 0.06, 0.55, 5.0, 21, and 31 MeV.
Van Allen, J. A.↗
Amino acids precursors in lunar finds
The consistent pattern is discussed of amino acids found in lunar dust from Apollo missions. The evidence indicates that compounds yielding amino acids were implanted into the surface of the moon by the solar wind, and the kind and amounts of amino acids found on the moon are closely similar to those found in meteorites. It is concluded that there is a common cosmochemical pattern for the moom and meteorites, and this offers evidence of a common course of cosmochemical reactions for carbon.
Sidney W. Fox↗