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Showing 36501 - 36520 of 36747 results
  • Experimental evaluation of work capacity as related to chronological and physiological aging
    Experimental evaluation of work capacity as related to chronological and physiological aging.
    Blake, Bruno
    1963-09-01 | PDF
    Research statistics has establish the fact that physical work capacity declines as a consequence of aging. The question has been raised, however, if this decline is the inevitable result of senescence or merely due to change in living habits. Great numbers of people have been observed no to comply with the statistics. One is inclined to explain suc ...
  • Mass Transportation in Massachusetts Demonstration Project Progress Report No 4
    Mass Transportation in Massachusetts: Demonstration Project Progress Report No. 4
    Massachusetts. Mass Transportation Commission
    1963-09-01 | PDF
    This fourth Progress Report presents the results of the first eight months of the program of demonstration experiments which the MTC is conducting in cooperation wit the Office of Transportation of the Housing and Home Finance Agency.
  • Marking the ApproachEnds of Channelization
    Marking the Approach-Ends of Channelization
    Rowan, Neilon J.
    1963-09-01 | PDF
    This report deals with a method of approach-end treatment to provide advance warning of physical barriers, such as channelizing islands and ramp terminals. The objectives of this approach-end treatment are "to provide, for approaching traffic, a maximum degree of warning of the presence of the island and a definite indication of the proper vehicle ...
  • Inflight loss of consciousness a case report
    Inflight loss of consciousness : a case report.
    Tang, Pei Chin ;
    Dille, J. Robert
    1963-09-01 | PDF
    A case of inflight vertigo and loss of consciousness in a private pilot, flying alone, is presented. The differential diagnosis and the significance of the findings of 5-7 per second theta waves in his resting EEG and high voltage slow waves during caloric irrigation of his right ear are discussed.
  • A central factor in pure tone auditory fatigue
    A central factor in pure tone auditory fatigue.
    Wernick, Joel S. ;
    Tobias, Jerry V.
    1963-09-01 | PDF
    A long accumulation of psychophysical and physiological evidence indicates that auditory fatigue has its locus of effect in the cochlea; transfer studies with negative or questionable results, and studies of cochlear chemistry and potentials with positive results all lead to the same conclusion. However, Galambo’s reports of inhibition through effe ...
  • The visual perception of spatial extent
    The visual perception of spatial extent.
    Gogel, Walter C.
    1963-09-01 | PDF
    This study was concerned with the manner in which perceived depth and perceived frontoparallel size varied with physical distance and hence with each other. An equation expressing the relation between perceived frontoparallel size and physical depth was developed and applied to frontoparallel size judgments determined with four observers under two ...
  • Economic Impact Study Along Interstate Highway 30 in Rockwall County Texas
    Economic Impact Study Along Interstate Highway 30 in Rockwall County, Texas
    Buffington, Jesse L. ;
    Wootan, Charley V.
    1963-09-01 | PDF
    This report shows the results of an analysis of data collected in the Rockwall County study area in an effort to isolate and measure some of the economic effects that the construction of Interstate Highway 30 (U.S. 67) has had on the county. A 14.5-mile strip of I.H. 30 lies within the boundaries of the county, passing through a completely rural ar ...
  • Mechanisms of action of the insecticide endrin
    Mechanisms of action of the insecticide endrin.
    Emerson, Thomas E. ;
    Brake, Charles M.
    1963-08-01 | PDF
    Cardiovascular effects of endrin insecticide are obscure. Experiments to investigate this phenomenon were carried out on dogs and suggested mechanisms of actions have been proposed. Results show that acute administration of endrin produces bradycardia, hypertension, copious salivation, tonic-clonic convulsions, increased body temperature, leukocyto ...
  • Unsuspected neurologic disease in aviation personnel survival following seizures in flight
    Unsuspected neurologic disease in aviation personnel : survival following seizures in flight.
    Seipel, John H. ;
    Wentz, Arthur E.
    1963-08-01 | PDF
    The increasing use of private and commercial air transportation combined with the steady increase in recreational aviation have inevitably increased the likelihood of pilot failure caused by medical disability simply because there are more pilots in the air more frequently.
  • Nystagmus responses of the cat to rotation and to directionally equivalent and nonequivalent stimuli after unitaleral caloric habituation
    Nystagmus responses of the cat to rotation and to directionally equivalent and non-equivalent stimuli after unitaleral caloric habituation.
    Collins, William E.
    1963-08-01 | PDF
    Six cats were exposed to mild angular acceleration before and after an intervening serried of 15 caloric irrigations. All trials were in total darkness. Slow–phase displacement of the eyes, beat frequency, and duration of nystagmus were scored. All 3 measures reflected a decline in both the primary and the secondary caloric measures.Responses to ro ...
  • Application of a relative procedure to a problem in binaural beat perception
    Application of a "relative" procedure to a problem in binaural beat perception.
    Tobias, Jerry V.
    1963-08-01 | PDF
    The existence of binaural beats has long been considered an indication of binaural interaction for timing and for periodicity of information. In the past, bilaterally matched sound pressure or sensation levels have been used in the investigation of these beats and the measuring technique was one which may be termed absolute. However, the present st ...
  • A Report on Field Tests of Prestressed Concrete Piles during Driving
    A Report on Field Tests of Prestressed Concrete Piles during Driving
    Hirsch, Teddy J.
    1963-08-01 | PDF
    Project No. 2-5-62-33 entitled "Study of Variables Which Affect Behavior of Concrete Piles During Driving," was initiated September 1, 1962. The objectives of the 1962-63 year were to (1) make an orderly theoretical computer investigation of the influence of various factors on the behavior of piles during driving, (2) present these results in the f ...
  • Human survivability of extreme impacts in freefall
    Human survivability of extreme impacts in free-fall.
    Snyder, Richard G.
    1963-08-01 | PDF
    Human deceleration tolerances beyond the limits imposed by voluntary experimental methods were studied by means of intensive case histories of 137 individuals who have survived extremely abrupt impacts in accidental, suicidal, and homicidal free-falls.Fall distances ranged up to 275’ and calculated velocities up to 116 ft/sec (79 mph). Physical and ...
  • A Median Study in Baytown Texas 1963
    A Median Study in Baytown, Texas [1963]
    Wootan, Charley V. ;
    Meuth, Hugo G.
    1963-08-01 | PDF
    This research procedure is commonly known as the "Before and After" approach. Quite simply, its aim is to develop a complete picture of an area under its original set of operating conditions, let the operating conditions be changed, and then develop another picture. The research techniques carried on under this program are merely the mechanical wor ...
  • A Report on Computer Study of Variables Which Affect the Behavior of Concrete Plies during Driving
    A Report on Computer Study of Variables Which Affect the Behavior of Concrete Plies during Driving
    Hirsch, Teddy J.
    1963-08-01 | PDF
    Project No. 2-5-62-33 entitled "Study of Variables Which Affect Behavior of Concrete Piles During Driving" was initiated September 1, 1962. The objectives of the 1962-63 year were to: (1) make an orderly theoretical computer investigation of the influence of various factors on the behavior of piles during driving; (2) present these results in the f ...
  • Chronic thrombotic obstruction of major pulmonary arteries report of a case successfully treated by thrombendarterectomy and a review of the literature
    Chronic thrombotic obstruction of major pulmonary arteries : report of a case successfully treated by thrombendarterectomy, and a review of the literature.
    Houk, Vernon N. ;
    Hufnagel, Charles A.
    1963-08-01 | PDF
    A case is reported of chronic massive thromboembolic occlusion of major pulmonary arterial branches successfully treated with embolectomy and endarterectomy. The historic features, physical signs and pathophysiologic alterations which form the basis for the diagnosis of this disorder are reviewed.
  • The mitigation of physical fatigue with spartase
    The mitigation of physical fatigue with "spartase".
    Nagle, Francis J. ;
    Balke, Bruno
    1963-07-01 | PDF
    Pharmacological and clinical observations have indicated that Spartase – the aspartic acid salts of potassium and magnesium – takes part in the intermediary metabolism and moderates physical fatigue.In this study attempts were made to evaluate effects of the drug on work capacity before and after episodes of physically fatiguing exercises. Work cap ...
  • Primary secondary and caloric nystagmus of the cat following habituation to rotation
    Primary, secondary, and caloric nystagmus of the cat following habituation to rotation.
    Collins, William E.
    1963-07-01 | PDF
    Ten cats were exposed to a series of above-threshold accelerations and sub-threshold decelerations.
  • Compaction of asphaltic concrete pavement with high intensity pneumatic roller part I
    Compaction of asphaltic concrete pavement with high intensity pneumatic roller : part I.
    Adam, Verdi ;
    Shah, S. C.
    1963-07-01 | PDF
    The purpose of this investigation was to:1) Determine the magnitude of the compactive effort and the umber of passes required in the field to obtain optimum density using a high intensity pneumatic roller.2) Effect a correlation between the field and the laboratory compactive effort utilizing different methods of compaction.3) Establish the optimum ...
  • In vivo measurement of total gas pressure in mammalian tissue
    "In vivo" measurement of total gas pressure in mammalian tissue.
    Lategola, Michael T.
    1963-07-01 | PDF
    An in vivo method for the quantitative estimation of total gas pressure in mammalian tissue has been established. This method utilizes a rigid-walled capsule specially constructed to be permeable to oxygen, carbon dioxide and nitrogen (O2, Co2, and N2), but negligible permeable to water vapor. The results obtained at equilibrium, after subcutaneous ...
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