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.
An annotated bibliography of translations of foreign-language articles is presented. The 24 entries are concerned with studies in aviation medicine, vestibular function, hearing, intercontinental flight, visual illusions, aviation visual aids, body temperature, heat center, head trauma, color vision, cholinesterase, nystagmus, aviation personnel se
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Interactions of linear and angular accelerations are frequently experienced by pilots during aircraft maneuvers. Several recent studies have indicated that the otoliths (detectors of linear acceleration) may influence responses of the semicircular canals (detectors of angular acceleration). To obtain some clearer evidence of such possible effects,
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An index to Office of Aviation Medicine Reports (1964-1971) and is presented as a quick reference for those engaged in aviation medicine and related activities. It provides a listing of all FAA aviation medicine reports published from 1961 through 1967 by year, number, author, subject and title.
Eleven pregnant baboons were subjected to experimental impacts. Variables included 20-, 33-, and 40-G levels of decelerative forces; forward and rearward facing seats; lap belt and lap belt plus shoulder harness restraint; and seat pans tilted 20 degrees and 45 degrees. At the 20-G level, maternal injuries were minimal. Fetal death occurred in asso
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Eight subjects were maintained on a standard dietary regimen ingested every four hours for 120 hours. Measurements of the magnesium and calcium excretion in these subjects revealed a circadian periodicity with maximal levels of excretion for both ions occurring during the sleeping hours (2200-0600) and minimal levels occurring during the mid-day (1
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A capacitive displacement transducer with a linear response and constant sensitivity for a frequency range of 0-1,000 Hz is described. Its application to measurement of chest wall motions was verified using static displacements from flat and curved surfaces and both metal and human tissue. The transducer has been used to obtain recordings of apex m
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The analysis presents an approach to the estimation of a current airman population by broad usage categories of air transport purposes, commercial purposes, private or student purposes, and unknown purposes. Observed usage relationships among sampled airmen from the active medical certification files provided the basis from which the estimation mod
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The general objectives of the conference were (1) to bring together personnel who are vitally involved in the transportation system of the United States and (2) to cast an eye toward the corning decade concerning what is ahead for transportation. The underlying question which served as the catalyst was, "Where do we go from where we are?" The confe
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The 1966-67 plan of research for Phase 2 of Research Study 2-8-65-81 outlined an investigation to determine the limiting ranges of natural soils which can be fired to produce aggregates suitable for use in flexible base materials. This is a progress report of that investigation. Its purpose is to report the more significant findings to date, so tha
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This report describes the evaluation of a gyratory compactor developed by the Texas Transportation Institute for the sole purpose of producing specimens of high uniformity for repetitive triaxial testing. The material selected for use in the evaluation was a crushed limestone. In prior investigations, replicate specimens made from this limestone ex
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This report results from preparation for research concerned with the entrained air system in concrete and should provide a comprehensive review of the present state of knowledge in this area. The material is organized to answer the following basic questions in the order presented.
Variations in the entrained air system in hydraulic cement mortars due to different chemical types of air-entraining agents and retarders and different mixing methods were investigated. Twenty-seven mortar hatches were prepared at a fundamentally constant air content using different combinations of three mixing sequences, three air-entraining agent
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This is the first of a series of reports to be written concerned with the design of these footings. It shows in detail the theoretical development on which the subsequent reports will be based. The second report in this series will provide a comparison of the theory with model tests and the third report will present a "Tentative Design Procedure" f
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In an attempt to more closely associate the visual aspects of instrument flying with that of contact flight, a study was made of human response to peripheral vision cues relating to aircraft roll attitude. Pilots, ranging from 52 to 12,000 flying hours experience, were tested in a multi-engine aircraft simulator. Data on aircraft bank angle, headin
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Before the Iowa Department of Transportation (DOT) was established by legislation in July 1974, there were several state agencies that handled the tasks that are now the responsibility of an integrated, multimodal Iowa DOT. Among those agencies was the Iowa State Highway Commission (IHC).You are invited to read a brief history of the Iowa DOT here:
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For almost a decade since I959, three years after the start of the greatest public works program ever conceived, the Special Subcommittee on the Federal-Aid Highway Program has served Congress as a monitor of the entire project. Under the leadership of Chairman John A. Blatnik of Minnesota, the Subcommittee has carried out its mandate to inquire in
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A study is reported herein of the performance of either an abrupt rise or a partial transverse sill as a part of a culvert energy dissipation scheme in which flow parallel to the culvert axis is transformed into supercritical radial flow. Energy dissipation is accomplished by means of a hydraulic jump which was formed as a result of the combined ef
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A method of analysis for composite beams with any degree of horizontal shear interaction is presented. The method is very versatile; it is applicable to composite beams that have abrupt, point-by-point variations in their structural properties. Also, the beam may be subjected to any configuration of transverse or longitudinal load, and it may be su
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Air travelers crossing four or more time zones experience significant desynchronization of certain daily biologic rhythms. Until rephasing of the rhythms occurs relative to the solar cycle at the destination, some subjective discomfort and disruption of psychophysiologic responses can occur. This paper reviews research on diurnal rhythms, discusses
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