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The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations. Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.

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Showing 34901 - 34920 of 35440 results
  • A Study of Bridge Deck Deterioration Volume I
    A Study of Bridge Deck Deterioration Volume I
    Elmore, W. E.
    1967-06-01 | PDF
    This report is the result of a directive from Mr. D. C. Greer, State Highway Engineer, to determine the causes of deterioration in Texas structures and to recommend corrective measures. It is prepared in two volumes. This volume is the Discussion and Summation of the report. Volume II contains the description of Field Survey investigations and reco ...
  • A Laboratory Study of Dynamic LoadDeformation and Damping Properties of Sands Concerned with a PileSoil System
    A Laboratory Study of Dynamic Load-Deformation and Damping Properties of Sands Concerned with a Pile-Soil System
    Chan, Paul C. ;
    Hirsch, T. J.
    1967-06-01 | PDF
    The broad objective of this project is to fully develop the use of the computer solution of the wave equation so that it may he used to predict driving stresses in piling and be used to estimate static load hearing capacity of piling from driving resistance records. This report concerns itself with the specific objective of determining the dynamic ...
  • An Interim Report on a Study of Disability Veiling Brightness
    An Interim Report on a Study of Disability Veiling Brightness
    Rowan, Neilon J. ;
    Jensen, Hans C.
    1967-06-01 | PDF
    The present study, as part of a project to develop design criteria for economical and functional roadway lighting, is concerned with the effects of system geometry on the DVB produced by various light sources.
  • The relationships between chronological age length of experience and job performance ratings of air route traffic control specialists
    The relationships between chronological age, length of experience, and job performance ratings of air route traffic control specialists.
    Cobb, Bart B.
    1967-06-01 | PDF
    The survey-type study of several hundred journeymen radar control specialists of four Air Route Traffic Control Centers was conducted in order to determine the extent to which job performance might be associative with chronological age and length of experience in control work.For each of several experimentally derived ratings of job performance, a ...
  • A functional comparison of basic restraint systems
    A functional comparison of basic restraint systems.
    Young, Joseph W.
    1967-06-01 | PDF
    The availability of information necessary to provide realistic solutions for personal safety problems in public and private transportation systems is found to be inadequate and incomplete. The problem of body restraint during the accident event is pursued, in part by this study.Since the greatest frequency of serious injuries occurs from upper body ...
  • An evaluation of potential decompression hazards in small pressurized aircraft
    An evaluation of potential decompression hazards in small pressurized aircraft.
    Swearingen, John J.
    1967-06-01 | PDF
    Over 300 decompression tests were conducted to determine potential hazards of ejection or incapacitating or fatal head injuries in small volume pressurized aircraft in the event of sudden decompression following the loss of a window, emergency exit, door or windshield.Evaluations were made to determine the relationships of cabin volume (100 to 700 ...
  • A FiniteElement Method of Solution for Structural Frames
    A Finite-Element Method of Solution for Structural Frames
    Matlock, Hudson ;
    Grubbs, Berry Ray
    1967-05-01 | PDF
    An efficient numerical method of solution to structural frame problems is presented. The method is shown to be applicable to no-sway, plane-frame structures that may derive part or all of their support from soils. A finite-element model composed of bars and springs is used to represent groups of orthogonal frame members. Finite difference equations ...
  • Adaptation to vestibular disorientation V Eyemovement and subjective turning responses to two durations of angular acceleration
    Adaptation to vestibular disorientation. V, Eye-movement and subjective turning responses to two durations of angular acceleration.
    Collins, William E. ;
    Guedry, Fred E.
    1967-05-01 | PDF
    Influences of the duration of angular acceleration on turning sensations and on nystagmic eye movements which can blur vision are relevant to understanding vestibular reactions during certain aircraft accelerations. Ocular recordings were obtained from human subjects and cats to 4 deg/sec/sec angular accelerations of 8.4 sec and of 36 sec duration. ...
  • Performance characteristics of constantflow phase dilution oxygen mask designs for general aviation
    Performance characteristics of constant-flow phase dilution oxygen mask designs for general aviation.
    McFadden, Ernest B. ;
    Harrison, Hiley F.
    1967-05-01 | PDF
    The report describes evaluation of two prototype phase dilution rebreathing masks as compared to an open port rebreathing mask design. Human subjects wearing the prototype masks and engaged in three minute periods of rest and exercise were exposed to altitudes of 14,000, 18,000, 25,000, 30,000 and 34,000 feet in an altitude chamber.Each subject was ...
  • Interaural intensity difference limen
    Interaural intensity difference limen.
    Rowland, Roy C. ;
    Tobias, Jerry V.
    1967-05-01 | PDF
    The ability to judge the direction (the azimuth) of a sound source and to discriminate it from others is often essential to flyers. A major factor in the judgment process is the interaural intensity difference that the pilot can perceive. Three kinds of intensity-difference thresholds were compared for the purpose of determining interaural-binaural ...
  • Adaptation to vestibular disorientation VI Eyemovement and subjective turning responses to varied durations of angular acceleration
    Adaptation to vestibular disorientation. VI, Eye-movement and subjective turning responses to varied durations of angular acceleration.
    Guedry, Fred E. ;
    Collins, William E.
    1967-05-01 | PDF
    Turning sensations and eye movement responses during angular accelerations may show adaptation effects of significance to understanding vestibular reactions during certain aircraft maneuvers.In this study, a direct relationship found between duration of acceleration and (a) decline of response during acceleration, (b) rate of decline of response af ...
  • Adaptation to vestibular disorientation V EyeMovement and subjective turning responses to two durations of angular acceleration
    Adaptation to vestibular disorientation : V : Eye-Movement and subjective turning responses to two durations of angular acceleration.
    Collins, William E. ;
    Guedry, Fred E.
    1967-05-01 | PDF
    Recordings of ocular nystagmus were obtained from a group of cats and a groups of human subjects to 4/sec2 angular accelerations of 8.4 sec and of 36 sec duration. Laternal canals and vertical canals were stimulated on seperate trails. Results showed that the output of both primary and secondary nystagmus was greater for lateral canals.
  • Diagnostic tests of color defective vision annotated bibliography 19561966
    Diagnostic tests of color defective vision : annotated bibliography, 1956-1966.
    Lewis, Mark F. ;
    Ashby, Faye K.
    1967-05-01 | PDF
    This annotated bibliography of recent literature on diagnostic tests for color defect is presented as a scientific service of the Civil Aeromedical Institute.
  • The biophysical basis and clinical applications of rheoencephalography
    The biophysical basis and clinical applications of rheoencephalography.
    Seipel, John H.
    1967-05-01 | PDF
    A method for screening large populations for asymptomatic but potentially incapacitating cerebrovascular disease has obvious application in aviation medicine. Rheoencephalography (REG), a simple, rapid and innocuous method of studying the cranial circulation, was investigated for this purpose. A standardized, repeatable method involving tracing dur ...
  • Adaptation to vestibular disorientation VII Special effects of brief periods of visual fixation on nystagmus and sensations of turning
    Adaptation to vestibular disorientation. VII, Special effects of brief periods of visual fixation on nystagmus and sensations of turning.
    Collins, William E.
    1967-05-01 | PDF
    The influences of (a) disorientation experience and (b) brief periods of visual still-fixation were examined in exposing figure skaters and ordinary subjects to various rates of angular acceleration. Both nystagmic eye movements and sensations of turning were recorded. Skaters produced significantly less primary slow-phase eye displacement than did ...
  • Nuclear density evaluation on asphaltic concrete final report
    Nuclear density evaluation on asphaltic concrete: final report.
    Arena, Philip J.
    1967-04-01 | PDF
    This study was one of two studies designated as Research Project 62-1SB to evaluate the use of nuclear devices in highway construction. (1) The primary objective of this study was to evaluate a nuclear density device for obtaining densities on asphaltic concrete pavements during or after construction. On evaluating this device an attempt has been m ...
  • Development of techniques for evaluating the physiological protective efficiency of civil aviation oxygen equipment
    Development of techniques for evaluating the physiological protective efficiency of civil aviation oxygen equipment.
    McFadden, Ernest B.
    1967-04-01 | PDF
    A number of techniques for determining the protective efficiency of passenger and crew masks was developed, utilized and compared. In the case of newly developed passenger masks, subjects were exposed to a chamber flight profile designed around the National Aerospace Standard 1179. The two alternative methods of determining mask performance suggest ...
  • A protective passenger smoke hood
    A protective passenger smoke hood.
    McFadden, Ernest B. ;
    Reynolds, H.I.
    1967-04-01 | PDF
    Several recent jet transport accidents have focused the attention of the aviation industry upon smoke and toxic gases as causal factors of passenger incapacitation and failure to evacuate aircraft before fire and heat render the environment uninhabitable. If it were possible to provide passengers with a short duration supply of breathing air suffic ...
  • Problems in aerial application detection of mild poisoning by organophosphorus pesticides using and automated method for cholinesterase activity
    Problems in aerial application : detection of mild poisoning by organophosphorus pesticides using and automated method for cholinesterase activity.
    Fowler, Patsy R. ;
    McKenzie, Jess M.
    1967-04-01 | PDF
    In 1950 Koelle reported the use of thiolesters of choline in the histochemical detection of cholinesterase.
  • A Study of the Economic Impact of Interstate Highway 10 on Chambers County Texas
    A Study of the Economic Impact of Interstate Highway 10 on Chambers County, Texas
    Buffington, Jesse L.
    1967-03-01 | PDF
    The analysis of the Chambers County study area land value, land use, and business activity data is summarized below: l. In a predominantly agricultural area considerably removed from an urban area, properties abutting IH 10 received significant positive land value influences from the highway improvement. 2. Practically all of the tracts of land whi ...
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