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  • BIOSCIENCES  (4,888)
  • MACHINE ELEMENTS AND PROCESSES  (2,755)
  • Cell & Developmental Biology
  • Seismology
  • Weizen
  • 1970-1974  (3,969)
  • 1965-1969  (5,736)
  • 1925-1929
Collection
Keywords
Publisher
Years
Year
  • 1
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    Near-field observations and source parameters of Central California earthquakes (1974)
    In:  Bull. Seism. Soc. Am., San Francisco, Schweizerbart'sche Verlagsbuchhandlung, vol. 65, no. B10, pp. 1855-1886, pp. B10404, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publication Date: 1974
    Keywords: Nearfield ; Source parameters ; Seismology ; Nuclear explosion ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Reflections, rays and reverberations (1974)
    In:  Bull. seism. Soc. Am., New York, Allerton Press, vol. 64, no. 1, pp. 1685-1696, pp. L01606, (ISSN: 1340-4202)
    Details
    Publication Date: 1974
    Keywords: Reflectivity ; Ray seismics ; Multiples ; Seismology ; Seismics (controlled source seismology) ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Seismic observations in Germany of a 10 t explosion off Scotland (1974)
    In:  J. Geophys., Luxembourg, Conseil de l'Europe, vol. 40, no. 6, pp. 259-264, pp. L15S17, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 1974
    Keywords: Seismology ; Deep seismic sounding (espec. cont. crust) ; Project report/description
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
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    Body waves as normal and leaking modes (1974)
    In:  Bull. seism. Soc. Am., Jena, Scientific American, vol. 64, no. B9, pp. 301-307, pp. B09309, (ISSN: 1340-4202)
    Details
    Publication Date: 1974
    Keywords: Body waves ; Seismology ; NOModelling ; Synthetic seismograms ; Leaking modes ; Layers ; BSSA ; Bremaecker
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    Systematische Untersuchungen der kurzperiodischen seismischen Bodenunruhe in der Bundesrepublik Deutschland (1974)
    In:  Geologisches Jahrbuch Reihe E Geophysik - geophysics, Würzburg, Pergamon, vol. 37, no. E3, pp. 1-59, pp. B05S01, (ISSN: 1340-4202)
    Details
    Publication Date: 1974
    Keywords: Seismology ; NOISE ; background ; Germany
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    BIBLIOGRAPHY SEISMOLOGY
  • 6
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    Spectral Analysis in Geophysics (1974)
    Elsevier
    In:  Amsterdam, Elsevier, vol. 8, pp. 415, (ISBN 0-471-95596-5)
    Details
    Publication Date: 1974
    Keywords: Textbook of geophysics ; Data analysis / ~ processing ; Spectral analysis ; Spectrum ; Seismology ; Seismics (controlled source seismology) ; Bath
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    BIBLIOGRAPHY SEISMOLOGY
  • 7
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    Seismic source function for an underground nuclear explosion (1974)
    In:  Bull. Seism. Soc. Am., Tokyo, Inst. f. Theoret. Geodäsie, vol. 64, no. 3, pp. 131-148
    Details
    Publication Date: 1974
    Keywords: Nuclear explosion ; Source ; Seismology ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 8
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    Recorded strong motion on the Hsinfengkiang-dam, China (1974)
    In:  Bull. Seism. Soc. Am., Warszawa, Elsevier, vol. 64, no. 1, pp. 1337-1342, pp. 2091, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 1974
    Keywords: Induced seismicity ; Earthquake precursor: chemical (Rn, water(-level,...) ; Earthquake precursor: stresses ; Seismology ; Waves ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 9
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    An automatic event detector at the Tonto Forest seismic observatory (1974)
    In:  Geophys., Warszawa, Elsevier, vol. 39, no. 2, pp. 63-643, pp. 2382, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 1974
    Keywords: Seismology ; Detectors ; sta
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    BIBLIOGRAPHY SEISMOLOGY
  • 10
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    Automatic analysis of tape-recordings from seismic networks (1974)
    In:  Geophys. J. R. astr. Soc., Roma, Acad. Roy. des Sciences, vol. 39, no. 1, pp. 155-168, pp. B04102, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 1974
    Keywords: Seismology ; Seismic networks ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 11
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    Relations between different kinds of magnitude determination and their regional variations (1974)
    Central Earth Physics Institute, Academy of Sciences of the G.D.R.
    In:  Proc. XIV General Assembly of the European Seismological Commission, Trieste, September 16-22, 1974, Rome, Central Earth Physics Institute, Academy of Sciences of the G.D.R., vol. 10, no. 464, pp. 27-39
    Details
    Publication Date: 1974
    Keywords: Magnitude ; Data analysis / ~ processing ; Seismology ; noksp
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    BIBLIOGRAPHY SEISMOLOGY
  • 12
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    Getriggerte Bruchvorgänge als Modell für die Entstehung von Tieferdbeben (1974)
    Institut f. Meteorol. und Geophys., Univ. Frankfurt am Main
    In:  Dissertation, San Antonio, Institut f. Meteorol. und Geophys., Univ. Frankfurt am Main, vol. 11, no. CUED/C/Mats/Tr 51, pp. 426-439
    Details
    Publication Date: 1974
    Keywords: Source mechanics ; SModelling ; Source ; Laboratory measurements ; Seismology
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    BIBLIOGRAPHY SEISMOLOGY
  • 13
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    A precise, continuous measurement of seismic velocity (1974)
    In:  J. Geophys. Res., Tübingen, Europ. Ass. Exploration Geophys., vol. 79, no. 2, pp. 399-406, pp. 2017, (ISSN: 1340-4202)
    Details
    Publication Date: 1974
    Keywords: Velocity ; Seismology ; Earthquake precursor: prediction research ; Earthquake precursor: Vp/Vs anomalies ; JGR ; Body waves
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    BIBLIOGRAPHY SEISMOLOGY
  • 14
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    Automatic phase identification with one and two large aperture seismic arrays (1974)
    In:  Bull. Seism. Soc. Am., Washington, D.C., AGU, vol. 64, no. 5, pp. 221-233, pp. 1489, (ISSN: 1340-4202)
    Details
    Publication Date: 1974
    Keywords: Seismology ; Detectors ; AUD ; Seismic arrays ; Toksoez ; Toksoz ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 15
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    Global Tectonics and Earthquake Risk (1974)
    Elsevier
    In:  Amsterdam, London, New York, xiv+320 pp., Elsevier, vol. 5, no. 22, pp. 662-664, (ISBN 1-4020-1244-6)
    Details
    Publication Date: 1974
    Keywords: Earthquake risk ; Earthquake hazard ; Earthquake engineering, engineering seismology ; Seismicity ; Plate tectonics ; Tectonics ; Seismology
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    BIBLIOGRAPHY SEISMOLOGY
  • 16
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    Magnitude recurrence relation for central Mississippi Valley earthquakes (1974)
    In:  Bull. Seism. Soc. Am., Dordrecht, Martinus Nijhoff Publishers, vol. 64, no. 3, pp. 1189-1207, pp. L11307, (ISSN: 1340-4202)
    Details
    Publication Date: 1974
    Keywords: Seismicity ; Recurrence of earthquakes ; Seismology ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 17
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    Brunnen als seismische Übertragungssysteme (1974)
    Fachbereich Geowissenschaften der Johann Wolfgang von Goethe-Universität Frankfurt am Main
    In:  Dissertation, Yaroslavl, U.S.S.R., Fachbereich Geowissenschaften der Johann Wolfgang von Goethe-Universität Frankfurt am Main, vol. C 560, 183 pp., no. PL-TR-91-2130, pp. 5-7, (ISBN 3-933346-037)
    Details
    Publication Date: 1974
    Keywords: Seismology ; Fluids ; Instruments
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    BIBLIOGRAPHY SEISMOLOGY
  • 18
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    Space and man (1974)
    In:  CASI
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    Publication Date: 2006-01-11
    Description: The effects of man's entry into space on changes in economics and technology, politics and law, science, philosophy, and art are considered. A single world economy, extracting from the natural resources of the moon and other cosmic bodies raw materials and energy, will avoid terrestrial limitations and improve society by eliminating the inequalities of economic and social status. However, a spacecraft for interplanetary travel require thermonuclear engines that achieve an escape velocity of 0.1 times the speed of light in order to allow an astronaut stellar expedition corresponding to the active life of a single generation.
    Keywords: BIOSCIENCES
    Type: Inhabited Space, Pt. 2 (NASA-TT-F-820); p 128-134
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  • 19
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    Detection of life in space (1974)
    In:  CASI
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    Publication Date: 2006-01-11
    Description: The selection of spacecraft experiments and equipment to detect extraterrestrial life outside earth centers on observations of chemical compounds similar to amino acids and proteins, on signs of metabolism in the form of nutrient absorption, and life form impressions in fossiles or signs of civilization.
    Keywords: BIOSCIENCES
    Type: Inhabited Space, Pt. 2 (NASA-TT-F-820; p 42-52
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  • 20
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    Space psychology (1974)
    In:  CASI
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    Publication Date: 2006-01-11
    Description: Psychological selection of astronauts considers mental responses and adaptation to the following space flight stress factors: (1) confinement in a small space; (2) changes in three dimensional orientation; (3) effects of altered gravity and weightlessness; (4) decrease in afferent nerve pulses; (5) a sensation of novelty and danger; and (6) a sense of separation from earth.
    Keywords: BIOSCIENCES
    Type: Inhabited Space, Pt. 2 (NASA-TT-F-820); p 29-41
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  • 21
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    Life in space (1974)
    In:  CASI
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    Publication Date: 2006-01-11
    Description: Biotechnological aspects of manned space flight are reviewed and the basic biological problems of training and sustaining man in interplanetary flights are elaborated.
    Keywords: BIOSCIENCES
    Type: Inhabited Space, Pt. 2 (NASA-TT-F-820); p 17-28
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  • 22
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    Noise control of pneumatic percussion drills (1974)
    In:  CASI
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    Publication Date: 2006-01-11
    Description: Noise sources in pneumatic drills are studied bringing to light the fact that air exhaust is the most important source. The present state of the art of noise control is discussed for pneumatic percussion drills abroad, indicating the different solutions adopted in this respect. Drills produced in Rumania are described and the results of noise measurements are shown.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 1A (NASA-TT-F-15375); p 177-181
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  • 23
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    Contributions to the study of the characteristics of bearing noise and vibrations (1974)
    In:  CASI
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    Publication Date: 2006-01-11
    Description: Results of experimental research on the noise and vibrations of radial ball and roller bearings are reported. Analysis of the frequency spectra disclosed dependences among vibration and noise, load, rpm and cage material. Some peculiar aspects of the frequency spectrum are also mentioned.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 1A (NASA-TT-F-15375); p 131-135
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  • 24
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    Aspects of reducing spur gear noise (1974)
    In:  CASI
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    Publication Date: 2006-01-11
    Description: Noise sources in gears and ways of improving their silence by profile shape alterations and wheel surface smoothness are discussed. Practical results obtained, from the noise point of view are reported, for textile machinery.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 1A (NASA-TT-F-15375); p 124-130
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  • 25
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    Contributions to the reduction of gear noise (1974)
    In:  CASI
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    Publication Date: 2006-01-11
    Description: The influence of profile displacements on the acoustic pressure level of running gears is studied. The conclusion is reached that extra polar gears function well, reducing the acoustic pressure level by about 2-3 db which, at the level of the total noise of 80-90 db, can be easily felt. This result can be explained by the fact that in this gear the pitch point is situated outside of the gearing segment, so that a certain change in the direction of the friction force between the tooth flanks is eliminated.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 1A (NASA-TT-F-15375); p 118-123
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  • 26
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    Load influence on gear noise (1974)
    In:  CASI
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    Publication Date: 2006-01-11
    Description: An original mathematical model is proposed to derive equations for calculation of gear noise. These equations permit the acoustic pressure level to be determined as a function of load. Application of this method to three parallel gears is reported. The logical calculation scheme is given, as well as the results obtained.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 1A (NASA-TT-F-15375); p 112-117
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  • 27
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    Preliminary study of gear noise characteristics (1974)
    In:  CASI
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    Publication Date: 2006-01-11
    Description: Experimental results and conclusions are presented about the noise characteristics of gears as a function of their operating conditions. The interpretive possibilities offered by real time noise and vibration spectrum analysis are emphasized. The noise reducing effects of light weight insulation boxes are also discussed.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 1A (NASA-TT-F-15375); p 104-111
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  • 28
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    Considerations on the acoustic energy radiated by toothed gears (1974)
    In:  CASI
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    Publication Date: 2006-01-11
    Description: A mechano-acoustic model is reported for calculating acoustic energy radiated by a working gear. According to this model, a gear is an acoustic coublet formed of the two wheels. The wheel teeth generate cylindrical acoustic waves while the front surfaces of the teeth behave like vibrating pistons. Theoretical results are checked experimentally and good agreement is obtained with open gears. The experiments show that the air noise effect is negligible as compared with the structural noise transmitted to the gear box.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 1A (NASA-TT-F-15375); p 98-103
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  • 29
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    Acoustic determination of cracks in welded joints (1974)
    In:  CASI
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    Publication Date: 2006-01-11
    Description: The acoustic analysis method permits detection of any cracks that might take place and their manner of propagation. The study deals with the cracks produced in experiments to determine the welding technology for a welded gray cast iron workpiece by using piezoelectric transducers to determine vibration acceleration.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 1A (NASA-TT-F-15375); p 93-97
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  • 30
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    US studies in the field of shaft drilling on the lunar surface (1974)
    In:  CASI
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    Publication Date: 2006-01-11
    Description: American equipment for drilling in the lunar surface is discussed, with emphasis on rotary-percussive methodology and core-sample retrieval techniques.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Current Concepts Regarding the Moon (NASA-TT-F-766); p 192-205
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  • 31
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    Induction brazing at the Kennedy Space Center (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: A description of the joint design, materials, equipment, qualification testing, inspection methods, and applications involved in performing induction brazing on hyperbolic propellants tubing at Kennedy Space Center. Induction brazing is a form of brazing in which the energy is transmitted to the workpiece by electrical induction; the eddy currents generated in the metal produce heat by resistance losses. Since induction heating is fast and highly localized, undesirable heat effects are minimized and the resulting braze is of high quality.
    Keywords: MACHINE ELEMENTS AND PROCESSES
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  • 32
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    Impact testing on composite fan blades (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The results of impact tests on large, fiber composite fan blades for aircraft turbofan engine applications are discussed. Solid composite blades of two different sizes and designs were tested. Both graphite/epoxy and boron/epoxy were evaluated. In addition, a spar-shell blade design was tested that had a boron/epoxy shell bonded to a titanium spar. All blades were tested one at a time in a rotating arm rig to simulate engine operating conditions. Impacting media included small gravel, two inch diameter ice balls, gelatin and RTV foam-simulated birds, as well as starlings and pigeons. The results showed little difference in performance between the graphite and boron/epoxy blades. The results also indicate that composite blades may be able to tolerate ice ball and small bird impacts but need improvement to tolerate birds in the small duck and larger category.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: SAMPE Quarterly; 5; July 197
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  • 33
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    Alterations in left ventricular volumes induced by Valsalva manoeuvre (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Five patients were studied with left ventriculography during different phases of the Valsalva manoeuvre. Small doses of contrast medium allowed adequate repetitive visualization of the left ventricle for volume calculation. During strain phase, the volume of the left ventricle decreased by nearly 50 per cent in each case, and stroke volume and cardiac output also dropped strikingly. Release of straining was attended by a sharp rebound of left ventricular volume to control levels, with a transient surge of increased cardiac output 42 per cent above that of the resting state.
    Keywords: BIOSCIENCES
    Type: British Heart Journal; 36; July 197
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  • 34
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    Apollo space crew cardiovascular evaluations (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Cardiovascular responses associated with pre- and postflight orthostatic tolerance evaluations of Apollo crewmen are presented with a brief historical survey and a discussion of their implications for future manned space flight. Heart rates were increased while systolic and pulse pressures were decreased during the immediate postflight orthostatic evaluation. A postflight elevation in resting heart rate was a less frequent finding.
    Keywords: BIOSCIENCES
    Type: Aerospace Medicine; 45; Aug. 197
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  • 35
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    Recovery of medically important microorganisms from Apollo astronauts (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Microbiological samples were obtained from the crewmembers of the Apollo 13, 14, 15, 16, and 17 spaceflights. These specimens were analyzed for the presence of medically important microorganisms with Staphylococcus aureus, Pseudomonas aeruginosa, Tricophyton mentagrophytes, Tricophyton rubrum, and Candida albicans being discussed in detail. Preflight isolation of crewmembers was found to coincide with a complete absence of inflight disease events and is recommended for future spaceflights. No autoinfection response (microbial shock) occurred after any of the reported spaceflights.
    Keywords: BIOSCIENCES
    Type: Aerospace Medicine; 45; Aug. 197
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  • 36
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    Alteration of pituitary-adrenal dynamics induced by a water deprivation regimen (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Experiments are described which were designed to assess the degree of adaptation that occurs in rats chronically exposed to the stress of a water-deprivation regimen and to determine if that adaptation represents a normalization of the hypothalamic-pituitary-adrenal axis. There were no significant differences in mean corticosterone concentrations among control nondeprived rats 1, 4, and 8 weeks after the start of the experiment. The water-deprived rats, however, had significantly elevated plasma steroids 1 and 4 weeks after the onset of deprivation as compared to controls, but not after 8 weeks. Thus, there was a significant decrease in mean plasma corticosterone levels during water deprivation from 1 week to 8 weeks.
    Keywords: BIOSCIENCES
    Type: Physiology and Behavior; 12; 1974
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  • 37
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    Sealing of large leaks in high-vacuum systems subject to mechanical and thermal stresses (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The use of silicone rubber adhesive (particularly, G.E. RTV-108) for sealing large leaks in high vacuum systems subject to mechanical and thermal stresses is shown to be more effective than that of epoxy cements. The sealant is applied externally to the leak while the system is partially evacuated so that it is drawn into the hole.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Journal of Vacuum Science and Technology; 11; July-Aug
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  • 38
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    Aluminized alloy boosts turbine blade life (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Description of an aluminized alloy coating technique that involves first the application of a ductile, oxidation-resistant overlay, such as NiCrAl, which is then partially aluminized. The duplex protective system has performance advantages over conventional aluminide coatings in that it provides higher-temperature hot corrosion resistance over a longer service life.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Metal Progress; 106; Aug. 197
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  • 39
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    Effects of simulated weightlessness on responses of untrained men to +Gz acceleration (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: This study documents bedrest-induced metabolic and physiologic changes in six untrained men exposed, following a two-week period of simulated weightlessness, to possible +Gz acceleration profiles anticipated for Space Shuttle vehicle travel. All subjects demonstrated decreased +Gz tolerance following simulated weightlessness. While only one of six subjects could not tolerate the +Gz profile in the control phase of the study, three of the six could not complete the postbed-rest study. The use of an inflated standard Air Force cutaway G-suit improved +Gz tolerance in all subjects, but two of six subjects still failed to complete the profile. These findings are discussed in reference to the selection of untrained humans for Space Shuttle vehicle travel.
    Keywords: BIOSCIENCES
    Type: Journal of Applied Physiology; 36; June 197
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  • 40
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    Friction and friction-generated temperature at a polymer-metal interface (1974)
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    Publication Date: 2011-08-16
    Description: Results of friction and thermal tests of molded polyimide and pyrrone polymers are presented. The coefficient of sliding friction up to surface velocities of 2 m/sec and the coefficient of thermal expansion from 300 to 500 K were measured. An apparatus was constructed to measure simultaneously the coefficient of sliding friction and the friction-generated temperature. Measurements were made at a nominal pressure-velocity product of 0.25 MN/msec and at temperatures between 300 and 500 K.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Polymer Engineering and Science; 14; Apr. 197
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  • 41
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    Determination of left ventricular size and shape (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Significant advances have occurred over the past 15 years in the ability to measure ventricular dimensions. Angiocardiography still remains the most reliable method for overall determination of chamber size and shape and serves as a standard for calibration or comparison for newer methods. Improvements in the use of radiographic methods over the next few years are anticipated with more extensive use of multiplane studies associated with repeated injections of improved contrast materials that produce fewer physiological effects or with substances that adhere to the endocardial surfaces. It is also anticipated that existing methods for automatically obtaining dimensional information from X rays will be continued and improved.
    Keywords: BIOSCIENCES
    Type: Circulation Research; 34; Jan. 197
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  • 42
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    Serotonin and pituitary-adrenal function (1974)
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    Publication Date: 2011-08-16
    Description: An investigation is conducted to evaluate the response of the pituitary-adrenal system to a stress stimulus in the rat. In the investigation brain serotonin synthesis was inhibited with p-chlorophenylalanine. In other tests the concentration of serotonin was enhanced with precursors such as tryptophan or 5-hydroxytryptophan. On the basis of the results obtained in the study it is speculated that in some disease states there is a defect in serotonergic neuronal processes which impairs pituitary-adrenal feedback mechanisms.
    Keywords: BIOSCIENCES
    Type: Nature; 248; Mar. 29
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  • 43
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    Life span and fine structural changes in oxygen-poisoned drosophila melanogaster (1974)
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    Publication Date: 2011-08-16
    Keywords: BIOSCIENCES
    Type: Aerospace Medicine; 45; Mar. 197
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  • 44
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    Solid state and fusion resistance spot welding of TD-NiCr sheet (1974)
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    Publication Date: 2011-08-16
    Keywords: MACHINE ELEMENTS AND PROCESSES
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  • 45
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    Ultrasonic examination of welded joints of great thickness in mechanical equipment under pressure (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The requirements involved in choosing ultrasonic devices, the factors that affect testing, and recommended calibration methods are discussed. The ultrasonic testing method is the only method that up to now permits detection of defects in welded joints of great thickness. The results are conditioned by the performances of the devices employed as well as by the degree of instruction of the personnel.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: the 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 199-203
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  • 46
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    Influence of ultrasounds on electrolytic polishing (1974)
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    Publication Date: 2011-08-16
    Description: On the basis of study of the electrolytic polishing of metal pieces, the following conclusions can be drawn: (1) Utilization of ultrasonically irradiated electrolytes in the electrolytic polishing of copper and steel pieces leads to enhanced polishing quality. (2) Polishing time for the reference pieces was twice as long as for the test pieces. (3) The chemical attack exerted on the surface of the test pieces in order to get the structure of the respective metal lasted less than half as long and yielded superior qualitative results in the copper as well as in the OT 60-2 steel test pieces polished with ultrasonically irradiated electrolytes. (4) The utilization of higher polishing current densities can be explained by the fact that the cavitational effect that arises in the electrolyte owing to ultrasounds contributes to an increase in the solution's electrical conductivity and elimination of gases from the electrolyte.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: the 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 210-214
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  • 47
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    Irregular bilayer structure in vesicles prepared from Halobacterium cutirubrum lipids (1974)
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    Publication Date: 2011-08-16
    Description: Fluorescent probes were used to study the structure of the cell envelope of Halobacterium cutirubrum, and, in particular, to explore the effect of the heterogeneity of the lipids in this organism on the structure of the bilayers. The fluorescence polarization of perylene was followed in vesicles of unfractionated lipids and polar lipids as a function of temperature in 3.4 M solutions of NaCl, NaNO3, and KSCN, and it was found that vesicles of unfractionated lipids were more perturbed by chaotropic agents than polar lipids. The dependence of the relaxation times of perylene on temperature was studied in cell envelopes and in vesicles prepared from polar lipids, unfractionated lipids, and mixtures of polar and neutral lipids.
    Keywords: BIOSCIENCES
    Type: Biochimica et Biophysica Acta; 356; 1974
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  • 48
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    Human radiation tolerance (1974)
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    Publication Date: 2011-08-16
    Description: The acute radiation syndrome in man is clinically bounded by death at high dose levels and by the prodromal syndrome of untoward physiological effects at minimal levels of clinically effective exposure. As in lower animals, man experiences principally three acute modes of death from radiation exposure (Bond et al., 1965). These are known collectively as the lethal radiation syndromes: central nervous system death, gastrointestinal death, and hematopoietic death. The effect of multiple exposure on lethality, the effect of multiple exposure on hematopoietic recovery, and quantitative aspects of cell and tissue repair are discussed.
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  • 49
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    Ultrastructural response of rat lung to 90 days' exposure to oxygen at 450 mm Hg (1974)
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    Publication Date: 2011-08-16
    Description: Young Sprague-Dawley rats were exposed to 100% oxygen at 450 mm Hg in constant environment capsules for 90 days. Lung tissue examined by electron microscopy revealed a number of changes, many similar to those observed after exposure to oxygen at 760 mm Hg for shorter periods of time. Alterations in vesicle size and number and in mitochondrial matrix and cristae appear in both the endothelial and epithelial cells. Blebbing and rarefication of cytoplasm occur in both cell layers of the alveolo-capillary wall. Also seen are fluid in the basement membrane, platelets in the capillaries, and alveolar fluid and debris. All of these alterations occur at 1 atm exposure. However, after exposure to 450 mm Hg the changes are not as widespread nor as destructive as they are at the higher pressure.
    Keywords: BIOSCIENCES
    Type: Aerospace Medicine; 45; Sept
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  • 50
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    Microbial detection method based on sensing molecular hydrogen (1974)
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    Publication Date: 2011-08-16
    Description: An approach involving the measurement of hydrogen evolution by test organisms was used to detect and enumerate various members of the Enterobacteriaceae group. The experimental setup for measuring hydrogen evolution consisted of a test tube containing two electrodes plus broth and organisms. The test tube was kept in a water bath at a temperature of 35 C. It is pointed out that the hydrogen-sensing method, coupled with the pressure transducer technique reported by Wilkins (1974) could be used in various experiments in which gas production by microorganisms is being measured.
    Keywords: BIOSCIENCES
    Type: Applied Microbiology; 27; May 1974
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  • 51
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    Monitoring the presence of foreign bodies in the equipment (1974)
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    Publication Date: 2011-08-16
    Description: The methods for monitoring the presence of foreign bodies in radio electronic equipment are discussed. Descriptions of the structural design under the operating principle of the device for detecting foreign bodies weighing to 0.0026 grams are given.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Technol. for the Production of Space Equipment (NASA-TT-F-15766); p 100-102
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  • 52
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    Process for manufacturing slit collimators (1974)
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    Publication Date: 2011-08-16
    Description: Peculiarities are described of the manufacturing process and the control of elements of slit collimators, the structural design of the required equipment and the process or assembling the collimators.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Technol. for the Production of Space Equipment (NASA-TT-F-15766); p 89-91
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  • 53
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    Method of applying a mirror reflecting layer to instrument parts (1974)
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    Publication Date: 2011-08-16
    Description: A method follows for applying a mirror reflecting layer to the surfaces of parts, instruments, apparatus, and so on. A brief analysis is presented of the existing methods of obtaining the mirror surface and the advantages of the new method of obtaining the mirror surface by polymer casting mold are indicated.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Technol. for the Production of Space Equipment (NASA-TT-F-15766); p 84-88
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  • 54
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    Process of manufacturing small-module gears with internal coupling (1974)
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    Publication Date: 2011-08-16
    Description: The small module geared coupling of an undulatory transmission is considered. Versions of the manufacture of gears with internal coupling and the instruments and equipment used, are reported.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Technol. for the Production of Space Equipment (NASA-TT-F-15766); p 77-79
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  • 55
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    Process of manufacturing grids from wire less than 0.025 MM in diameter by the galvanic growth method (1974)
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    Publication Date: 2011-08-16
    Description: The process of manufacturing grids, the peculiarities of the structural design, the fittings, the requirements on the tools and work area are discussed.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Technol. for the Production of Space Equipment (NASA-TT-F-15766); p 80-83
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  • 56
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    Prospective areas in the production technology of scientific equipment for space research (1974)
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    Publication Date: 2011-08-16
    Description: The average labor of individual types of operations in the percentage ratio of the total labor consumption of manufacturing scientific instruments and apparatus for space research is presented. The prospective areas in the production technology of billet, machining, mechanical assembly, installation and assembly, adjustment and regulation and testing and control operations are noted. Basic recommendations are made with respect to further reduction of labor consumption and an increase in the productivity of labor when manufacturing scientific equipment for space research.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Technol. for the Production of Space Equipment (NASA-TT-F-15766); p 69-76
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  • 57
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    Servosystem with an undulatory reducing gear (1974)
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    Publication Date: 2011-08-16
    Description: The development of a potentiometric servosystem is described that has a dc microservomotor, which is the built in drive of an undulatory reducing gear. The operation of the system and the structural design of the undulatory reducing gear are elaborated. Results are presented from analyzing some tests of various types of undulatory reducing gear generators.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Technol. for the Production of Space Equipment (NASA-TT-F-15766); p 44-53
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  • 58
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    Treatment of the external epicondylitis of the humerus with a magnetic field (1974)
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    Publication Date: 2011-08-16
    Description: The therapeutic effect of a constant and varying magnetic field on epicondylitis of the humerus is studied on ninety patients. Good results are obtained from the treatment (recovery of 80%, considerable improvement in 14.5%). The method is recommended for clinical application.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 191-197
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  • 59
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    Effect of magnetic bracelets on the coagulation and anticoagulation systems of the blood of patients with hypertension (1974)
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    Publication Date: 2011-08-16
    Description: The data which have been obtained on the influence of magnetic bracelets on the coagulation and anticoagulation systems of the blood indicate that the wearing of magnetic bracelets results in a decrease in the coagulation activity of the blood and an increase in the activity of the anticoagulation system. These changes must be viewed as favorable for patients with cardiovascular pathology.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 167-190
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  • 60
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    Changes in the fibrinogen-fibrin system following a 20-hour exposure of rabbits to a magnetic field (1974)
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    Publication Date: 2011-08-16
    Description: Prolonged exposure of animals to a constant magnetic field resulted in a sharp increase in the amount of fibrinogen. The addition of EACA to the plasma of experimental rabbits as well as protamine sulfate caused an additional increase in the amount of fibrinogen. A 20-hour exposure was accompanied by phenomena of paralysis of the pelvic limbs and death of some of the animals.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 163-166
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  • 61
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    Influence of a constant magnetic field on the fibrinogen-fibrin system (1974)
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    Publication Date: 2011-08-16
    Description: The effect of a constant magnetic field with a strength of 2500 oersteds on the fibrinogen-fibrin system was studied in the organism of healthy rabbits with exposure times of 1 and 5 hours. The results obtained indicate disruptions in the stage of conversion of fibrinogen to fibrin and an increase in the amount of fibrinogen.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 157-161
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  • 62
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    Influence of a constant magnetic field on thrombocytes (1974)
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    Publication Date: 2011-08-16
    Description: In an experiment on white mice it was found that a constant electromagnetic field with strength of 250-275 oersteds is biologically active at an exposure of 55 minutes. Qualitative and morphological changes in thrombocytes 1-3 days following exposure reduced their numbers, prolonged blood coagulation time and increased the number of leucocytes.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 141-147
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  • 63
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    The protective effect of a constant magnetic field (1974)
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    Publication Date: 2011-08-16
    Description: The protective effect of a constant magnetic field sharply reduced spontaneous lysis of E. coli cells when subjected to ultraviolet radiation. A protective effect of a CMF was found in a study of tissue cultures of normally growing cells (kidney epithelium) and cancer cells (cells from a cancer of the larynx). The protective effect of a CMF is also seen in a combined exposure of tissue cultures to X-rays and CMF energy (strength of the CMF was 2000 oersteds with a gradient of 500 oersteds/cm). The data obtained are of interest to experimental oncology (development of new methods of treating malignant tumors).
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 148-156
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  • 64
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    Method of magnetobiological indication in clinical laboratory practice (1974)
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    Publication Date: 2011-08-16
    Description: Data are presented on the use of the method of magnetobiological indication for defining the immunobiological state of patients with very serious diseases. It has been found that the enzymes of a patient react more sensitively to the energy from a magnetic field. It is important that the magnetoreactivity of the enzymes, like the cell forms of the blood in the patients, have a certain relationship to the clinical-nosological forms and the dynamics of the illness of the subject.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 129-140
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  • 65
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    Influence of a constant and variable magnetic field on the coagulation of human blood in vitro and in vivo (1974)
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    Publication Date: 2011-08-16
    Description: The influence of constant and varying magnetic fields on the coagulation of the blood was studied in experiments performed in vitro and vivo. In the in vitro tests it was found that a constant magnetic field with a strength of 100 or 200 oersteds influences the coagulation of the blood, retarding it in some cases and speeding up the coagulation time in others. In the in vivo studies, both retarding and accelerating effects were likewise observed with respect to the coagulation of the blood, but the nature of the change was a function of the background. A normalizing effect of the magnetic field on the coagulation of the blood was observed.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 124-128
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  • 66
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    Change in fibrinolytic activity under the influence of a constant magnetic field (1974)
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    Publication Date: 2011-08-16
    Description: The fibrinolytic activity of plasma changes under the influence of a constant magnetic field (CMF) with a strength of 250 or 2500 oersteds. CMF shows a tendency toward normalization of fibrinolytic processes in the presence of pathological disturbances in fibrinolysis activation.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 117-123
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  • 67
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    Change in blood coagulation indices as a function of the incubation period of plasma in a constant magnetic field (1974)
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    Publication Date: 2011-08-16
    Description: The influence of a constant magnetic field (CMF) with a strength of 250 and 2500 oersteds on the recalcification reaction and the tolerance of plasma to heparin was studied as a function of the exposure time of the plasma to the CMF. The maximum and reliable change in the activation of the coagulatory system of the blood was observed after a 20-hour incubation of the plasma in a CMF. As the exposure time increased, the recalcification reaction changed insigificantly; the difference between the mean arithmetic of the experiment and control values was not statistically reliable. The tolerance of the plasma to heparin as a function of the exposure time to the CMF of the plasma was considerably modified, an was statistically reliable.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, aeronomy and Solar Phys. (NASA-TT-F-15862); p 109-116
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  • 68
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    Repeated action of a constant magnetic field on the blood coagulation system in artificially produced anemia (1974)
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    Publication Date: 2011-08-16
    Description: Changes are discussed in the coagulatory system of the blood in rabbits under the influence of a constant magnetic field of an intensity of 2500 oersteds against the background of artificially induced anemia. Reversibility of the changes produced and the presence of the adaptational effect are noted. Taking all this into consideration, the changes involving the coagulatory system of the blood which arise under the influence of a constant magnetic field may be considered to have a nerve-reflex nature.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 97-108
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  • 69
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    The influence of a constant magnetic field on the coagulatory system of the blood in an experiment (1974)
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    Publication Date: 2011-08-16
    Description: The influence of a constant magnetic field with a strength of 2500 oersteds on the coagulatory system of the blood in rabbits was studied; the animals were subjected to this field for one and five hours. The magnetic field acts on the coagulatory system of the blood after only one hour exposure. Repeated 5-hour exposures cause activation of the anticoagulatory system in the blood and causes distinctive effects on the subsequent changes in the coagulatory system of the blood. It is quite likely that in this instance the adaptational properties of the organism make themselves felt.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 82-96
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  • 70
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    Effect of a magnetic field of extremely low intensity on the coagulatory system of the blood (1974)
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    Publication Date: 2011-08-16
    Description: The influence of a magnetic field of 10,000 gamma on the conditions of the coagulatory system of rabbits was studied. The results from a number of experiments indicate that the action of a very weak magnetic field produces an increase in the coagulatory activity of the blood.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 73-81
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  • 71
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    Reactions of the nervous system to magnetic fields (1974)
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    Publication Date: 2011-08-16
    Description: This magnetobiological survey considers sensory, nervous, stress and genetic effects of magnetic fields on man and animals. It is shown that the nervous system plays an important role in the reactions of the organism to magnetic fields; the final biological effect is a function of the strength of the magnetic fields, the gradient, direction of the lines of force, duration and location of the action, and the functional status of the organism.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 59-72
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  • 72
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    Results of comparison of the dynamics of the epidemic process with changes in the planetary index of magnetic disturbance (1974)
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    Publication Date: 2011-08-16
    Description: Possible pathways for the action of factors related to solar activity and its magnetic effects on the epidemic process are discussed.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 31-38
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  • 73
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    Statistical evaluation of the significance of the influence of abrupt changes in solar activity on the dynamics of the epidemic process (1974)
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    Publication Date: 2011-08-16
    Description: Statistical evaluations of the significance of the relationship of abrupt changes in solar activity and discontinuities in the multi-year pattern of an epidemic process are reported. They reliably (with probability of more than 99.9%) show the real nature of this relationship and its great specific weight (about half) in the formation of discontinuities in the multi-year pattern of the processes in question.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 49-58
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  • 74
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    The problem of the periodicity of the epidemic process (1974)
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    Publication Date: 2011-08-16
    Description: An analysis of data from epidemics makes it possible to determine their principal causes, governed by environmental factors (solar activity, etc.) The results of an analysis of the periodicity of the epidemic process in the case of diphtheria are presented which was conducted with the aid of autocorrelation and spectral methods of analysis. Numerical data (annual figures) are used on the dynamics of diphtheria in 50 regions (points) with a total duration of 2,777 years.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 39-48
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  • 75
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    The influence of weather on fibrinolysis and fibrinogenolysis (1974)
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    Publication Date: 2011-08-16
    Description: Analysis of fibrinolysis and fibrinogenolysis indices by month showed an increase in the activity of these processes from winter to summer (1967-1968). At all seasons of the year, fibrinolysis and fibrinogenolysis increase during weather of the cyclonic type with passage of fronts and sharp fluctuations in meteorological factors in the atmosphere.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 24-30
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  • 76
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    Fibrinolysis and fibrinogenolysis on magnetically-active days (1974)
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    Publication Date: 2011-08-16
    Description: On magnetically-active days, activation of fibrinolysis and fibrinogenolysis is observed. The increase in fibrinolysis and fibrinogenolysis begins on the day of the onset of a magnetic storm, reaching a maximum in 24 hours. Activation is higher on days with magnetic storms with a sudden onset and a C index of 1.5-2.0.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 16-20
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  • 77
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    Influence of synoptic processes on fibrinolysis and fibrinogenolysis in healthy persons (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: It is shown that on days with frontal activity in the atmosphere the levels of fibrinolysis and fibrinogenolysis are increased. The reactions of fibrinolysis and fibrinogenolysis to the passage of warm and cold fronts varies with the season of the year.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 20-23
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  • 78
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    Influence of solar activity on fibrinolysis and fibrinogenolysis (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: During periods of high solar activity fibrinolysis and fibrinogenolysis are increased. A direct correlative relationship is established between the indices of fibrinolysis, fibrinogenolysis and solar flares which were recorded two days before the blood was collected for analysis.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 12-15
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  • 79
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    Notes on the concept of normal values employed in clinical practice (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The question of the considerable variations in various blood parameters under the influence of changes in environmental factors is discussed. Recommendations are given that so-called normal values should be given special attention. Fibrinolytic and fibrinogenolytic activity studies on the blood in healthy human beings revealed significant differences for individual months and even on specific days. Changes in the activity of fibrinolysis and fibrinogenolysis show a correlation with changes in the meteorological conditions, seasonal variations and changes in solar activity.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 9-11
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  • 80
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    Heliobiology, its development, successes and tasks (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Heliobiology studies the influence of changes in solar activity on life. Considered are the influence of periodic solar activity on the development and growth of epidemics, mortality from various diseases, the functional activity of the nervous system, the development of psychic disturbances, the details of the development of microorganisms and many other phenomena in the living world.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 1-8
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  • 81
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    Effectiveness of solid lubricant coatings for friction in hard vacuum (10-9 tor) (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: A study was made of the efficiency of solid lubricating coatings, based on MoS2 with various binders, during friction and under highvacuum conditions. Mass spectrometry was used for an analysis of the composition of the gas evolved from the coatings in the friction process. It is shown that the vacuum level, loading, and sliding velocity influence coating effectiveness. In the friction process the solid lubricant coatings yield characteristic decay products associated with the chemical nature of the binders. The mechanism of coating breakdown during friction is associated with the binder breakdown mechanism.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Space Studies in the Ukraine, No. 1 (NASA-TT-F-15535); p 99-112
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  • 82
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    Influence of low temperatures of friction and wear (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: A brief review of studies on low-temperature friction are briefly reviewed. A facility and technique for studying friction both in air and in vacuum at temperatures of +20 and -190 C is described. Results of a wear study of structural steels operating together with chromium steel are presented. It is shown that reduction of the test temperature in vacuum leads in certain cases to marked increase of the wear magnitude and friction coefficient. This is associated not only with the general change of the mechanical properties of the materials but also with the influence of temperature reduction on the hardening and structural formation taking place in the surface layers during friction.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Space Studies in the Ukraine, No. 1 (NASA-TT-F-15535); p 65-75
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  • 83
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    Study of the possibility of using solar radiant energy for welding and brazing metals (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The solar spectrum at the surface of the earth is analyzed. A facility for creating concentrated solar radiant energy flux is described, and data on its energetic capabilities are presented. The technology of solar welding by the fusion technique and joining by high-temperature brazing is examined. The use of concentrated solar radiant energy for welding and brazing metals and alloys is shown. The results of mechanical tests and microscopic and macroscopic studies are presented.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Space Studies in the Ukraine, No. 1 (NASA-TT-F-15535); p 9-18
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  • 84
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    Asperity lubrication and cavitation in face seals (1974)
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    Publication Date: 2011-08-16
    Description: The basic aspect of parallel-surface lubrication that distinguishes it from other areas of lubrication technology is that classical lubrication theory does not predict the existence of a stable hydrodynamic film for steady-state, isothermal, incompressible flow between smooth, parallel surfaces. Hydrodynamic films between apparently parallel surfaces have been observed in practice and are often essential for the reliable performance of thrust bearings and seals. In order to account for this fortunate discrepancy between classical theory and experiment, load-support mechanisms relating to accidential features characteristic of seal performance, which relax one or more of the assumptions in the classical theory and permit the theoretical prediction of load support are proposed. Some of the features that have been analyzed are vibratory effects such as wobble and bounce, surface waviness, nonsymmetric rotation resulting from various types of misalignment, lubricant density change, non-Newtonian lubricant effects, and surface roughness.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NBS The Role of Cavitation in Mech. Failures; p 77-87
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  • 85
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    On particle motion in an electric welding arc treated with sonic or ultrasonic oscillations (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The criteria for the stability of the subharmonic, harmonic, or superharmonic oscillations determine the relation between acoustic field parameters and particle parameters. The derived formulas underlie the destruction of the fragile Widmanstatten structure in weldings and therefore the designing of the generators that must be used for this welding process.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 131-138
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  • 86
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    Cracking and reformation of saturated hydrocarbons by ultrasound in the presence of water (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The exposure of saturated hydrocarbons to ultrasound (800 kHz, 6 W/sq cm) in the presence of water results in: (1) cleavage of the carbon chain, producing saturated and unsaturated hydrocarbons with a lower number of carbons than the initial hydrocarbon (cracking); and (2) recombination after cleavage, producing saturated and unsaturated hydrocarbons with a higher number of carbons than the initial hydrocarbon (reformation). The addition of argon facilitates these phenomena. The effects are attributed to a homolytic (radical) mechanism occurring within the cavitation bubbles under the effects of microsparks.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 139-147
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  • 87
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    Contributions to the use of macrosounds for boiler decrusting (1974)
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    Publication Date: 2011-08-16
    Description: The results of an investigation indicate the following: (1) The deposition of incrustations on the heating surfaces of steam boilers can be prevented by inserting between heating surface and water an insulating layer on which the boiler incrustation will be deposited. (2) The insulating layer reduces the coefficient of heat transmission by 2%. (3) The insulating layer can be removed by macrosounds with a frequency of about 20 kHz, after any interval of boiler operation.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 126-130
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  • 88
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    Contributions to study of the stability of the electric welding arc under the action of acoustic pressure (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: During the treatment of an electric welding arc with ultrasonic oscillations, an improvement was found in overall source-arc stability. Theoretical explanations are provided for this phenomenon and formulas of equivalence between the classical arc and the treated arc are derived, taking stability as their criterion. A knowledge of this phenomenon can be useful in extending the applications of ultrasounds to different forms of electric arcs.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 118-125
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  • 89
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    Rhythmic variation in heart rate and respiration rate during space flight - Apollo 15 (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: As part of the operational biomedical monitoring for Apollo manned missions, ECG and respiration rate are telemetered at selected intervals to mission control. The data were collected as part of this monitoring program. These data were evaluated for circadian and ultradian rhythmicity because of their uniqueness. The ability to detect and quantitate biorhythms in living systems during space flight is an important aspect of evaluating hypotheses concerning the underlying mechanisms of these phenomena. Circadian variation in heart rate during space flight is demonstrated here. In analyzing generated time series data it has been found that period discrimination is much better than the theoretical limit.
    Keywords: BIOSCIENCES
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  • 90
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    Hydrocortisone and ACTH levels in manned spaceflight (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The plasma hydrocortisone, plasma ACTH, and urinary hydrocortisone values were recorded for each man of the crews of Apollo flights eight through fifteen, 30, 14, and 5 days before flight, immediately after spaceflight recovery, and on future days until the return of most variables to preflight values. The plasma and urinary preflight hydrocortisone values were significantly higher than the postflight values. This result is discussed in terms of three possible explanations: (1) the adrenal-cortical function is suppressed during spaceflight; (2) the activity in flight may amount to stressful exercise, which tests have shown can cause a decrease in plasma adrenocortical hormones; and (3) the in-flight work-rest cycles may be such as to affect the circadian periodicity of the pituitary-adrenal function.
    Keywords: BIOSCIENCES
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  • 91
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    Fine structure of tannin accumulations in callus cultures of Pinus elliotti /slash pine/ (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Keywords: BIOSCIENCES
    Type: Canadian Journal of Botany; 52; 3, 19; 1974
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  • 92
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    Auditory and visual evoked potentials during hyperoxia (1974)
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    Publication Date: 2011-08-16
    Description: Experimental study of the auditory and visual averaged evoked potentials (AEPs) recorded during hyperoxia, and investigation of the effect of hyperoxia on the so-called contingent negative variation (CNV). No effect of hyperoxia was found on the auditory AEP, the visual AEP, or the CNV. Comparisons with previous studies are discussed.
    Keywords: BIOSCIENCES
    Type: Electroencephalography and Clinical Neurophysiology; 37; Oct. 197
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  • 93
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    Acoustical levitation for space processing (1974)
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    Publication Date: 2011-08-16
    Description: It is pointed out that many space-manufacturing processes will require the manipulation of weightless molten material within a container in such a way that the material does not touch the container wall. A description is given of an acoustical method which can be used for the positioning and shaping of any molten material including nonconductors such as glasses. The new approach makes use of an acoustical standing wave which is excited within an enclosure or resonator.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Astronautics and Aeronautics; 12; July-Aug
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  • 94
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    Auger analysis of films formed on metals in sliding contact with halogenated polymers (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The use of Auger electron spectroscopy (AES) to search for transferred polymer must contend with the fact that there has been no published work on Auger analysis of polymers. Since this is a new area for AES, the Auger spectra of polymers and of halogenated polymers in particular is discussed. It is shown that the Auger spectra of halogenated polymers have certain characteristics that permit an assessment of whether a polymeric transfer film has been established by sliding contact. The discussion is general and the concepts should be useful in considering the Auger analysis of any polymer. The polymers chosen for this study are the halogenated polymers polytetrafluoroethylene (PTFE), polyvinyl chloride (PVC), and polychlorotrifluorethylene (PCTFE).
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: Journal of Applied Physics; 45; July 197
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  • 95
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    Phase relationships between circadian rhythms and the environment in humans during hypokinesis (1974)
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    Publication Date: 2011-08-16
    Keywords: BIOSCIENCES
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  • 96
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    The action of ultrasounds on Bezostaia 1 winter wheat grown in sand pots treated with Knop solution (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The results of 3 years of research are presented concerning the increase in length and weight of the aerial biomass as compared with the underground biomass, as well as the productivity indexes of Bezostaia 1 winter wheat. The experiment involved two varieties, each of them with nine repetitions. Sterile sifted sand treated several times with a Knop solution during the vegetative period was used as a seed bed. The seeds were kept in water for 2 hours before treatment. Biometric and statistical measurements showed significant responses in the treated varieties.
    Keywords: BIOSCIENCES
    Type: the 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 244-249
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  • 97
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    New experimental contributions to understanding the effect of ultrasonic irradiation on tomatoes (1974)
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    Publication Date: 2011-08-16
    Description: Irradiation of Aurora 100 tomatoes by a hydrodynamic ultrasonic generator with a frequency of 25 kHz per sec intensifies seed germination and the growth of the plants, causing precosity and increasing the output by 15.63 to 37.65%. The most effective radiation time (between 20 and 40 min) intensifies the phenophases. It causes some increase in output and changes in the chemical compositions of the fruits.
    Keywords: BIOSCIENCES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 238-242
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  • 98
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    Research on wood bending in a macrosonic field (1974)
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    Publication Date: 2011-08-16
    Description: Woodworking often requires the wood to be bent into different shapes. In view of the fact that macrosonic waves compress and expand the medium through which they are being propagated we assumed that wood subjected to the action of these waves during the bending process would have enhanced plasticity as a result of the loosening-up that takes place in it, as well as of the reduction in effort. To this effect, the bending of wood plasticized in a macrosonic field was studied. This bending took place under good conditions, and structural analyses conducted with the aid of an electron microscope proved initial premises to be corrent. Applied on an industrial scale, this procedure would contribute to improving the technology of wood bending as well as to eliminating factory spoilage.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 234-237
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  • 99
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    Some aspects of using ultrasounds to improve sulfurous mineral flotation technology (1974)
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    Publication Date: 2011-08-16
    Description: The results are discussed which were obtained with a new method of desorption of collector reagents connected with improving the selectivity of the flotation of copper and lead concentrate through the action of ultrasounds. Analysis of the results obtained by treating copper and lead concentrate in an ultraacoustic field indicates an increase in the copper content of the copper concentrate, of the lead content in the lead concentrate and, at the same time, a reduction in the lead of the copper concentrate.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics Vol. 2, B (NASA-TT-F-15663); p 112-117
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  • 100
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    On the dynamic stability of the focus of deformation in the cold drawing of tubes on an ultrasonically activated plug (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: In the case of macrosonic drawing, it was experimentally determined that tube eccentricity is less than in the case of tube drawing without macrosonics. On this basis, a theoretical analysis was carried out of the effect of macrosounds on tube eccentricity, an analysis that qualitatively confirms the experimental data.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-15663); p 102-111
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