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Showing 32981 - 33000 of 36747 results
  • Inhalation Toxicology VIII Establishing Heat Tolerance Limits for Rats and Mice Subjected to Acute Exposures at Elevated Air Temperatures
    Inhalation Toxicology: VIII. Establishing Heat Tolerance Limits for Rats and Mice Subjected to Acute Exposures at Elevated Air Temperatures
    Crane, Charles R. ;
    Sanders, Donald C.
    1986-05-01 | PDF
    Experimental animal subjects are used most commonly to assess the toxicity ofthermal decomposition products (smoke) from burning materials. Nascent smoke isobviously quite hot; therefore, the design of smoke toxicity assay systems mustprovide for adequate cooling of the gases prior to exposure of the animals. Thisresearch has addressed the question ...
  • Production of Concrete Containing Fly Ash for Structural Applications
    Production of Concrete Containing Fly Ash for Structural Applications
    Archuleta Jr, L. G. ;
    Tikalsky, P. J.
    1986-05-01 | PDF
    Structural applications of concrete containing fly ash have been limited mainly to high strength concrete in the past. This trend is primarily due to the lack of information available to the resident engineer concerning curing conditions, setting times, strength characteristics and durability of normal strength fly ash concrete. This study addresse ...
  • USSR Report Transportation
    USSR Report: Transportation
    United States. Foreign Broadcast Information Service  ...
    1986-05-01 | PDF
    JPRS publications contain information primarily from foreign newspapers, periodicals and books, but also from news agency transmissions and broadcasts. Materials from foreign-language sources are translated; those from English-language sources are transcribed or reprinted, with the original phrasing and other characteristics retained.This serial re ...
  • Corridor Traffic Management for Highway Reconstruction Southeast Expressway Massachusetts 19841985
    Corridor Traffic Management for Highway Reconstruction: Southeast Expressway Massachusetts 1984–1985
    Steffens, William T. ;
    Weinstock, Sonia
    1986-05-01 | PDF
    Although anticipated as an extremely disruptive project, the reconstruction of Boston's Southeast Expressway when finished was considered by politicians and engineers alike as a model of how to reconstruct a major expressway while maintaining travel in the transportation corridor. The success of this reconstruction effort can be attributed to sever ...
  • Effectiveness of fly ash replacement in the reduction of damage due to alkaliaggregate reaction in concrete
    Effectiveness of fly ash replacement in the reduction of damage due to alkali-aggregate reaction in concrete.
    Farbiarz, Josef ;
    Carrasquillo, Ramon
    1986-05-01 | PDF
    The concrete industry is faced with the urgent need of improving its knowledgeabout the mechanism by which fly ash helps in the reduction of damage due toalkali-aggregate reaction in concrete to acceptable levels.The main objective of this research was to identify the most relevantcomponents of fly ash, cement, and concrete aggregates affecting the ...
  • Repetitive Load Test on Composite Precast Concrete Decked Bridges
    Repetitive Load Test on Composite Precast Concrete Decked Bridges
    Osegueda, R. A. ;
    Noel, J. S.
    1986-04-01 | PDF
    Bridge deck replacement using precast concrete panels minimizes replacement time as well as traffic interference. An experimental study consisting of a repetitive load test on a 1/3 scale model of a 60-ft I-beam composite bridge with precast concrete panels connected with epoxy mortar and shear stud connectors is described here. Two million load cy ...
  • Evaluation of experimental railroadhighway grade crossings in Louisiana final report 19701985
    Evaluation of experimental railroad-highway grade crossings in Louisiana : final report : 1970-1985.
    Bokun, Steve G. ;
    Moore, Alfred F.
    1986-04-01 | PDF
    This report concludes formal evaluation of forty-one experimental high-type railroad-highway grade crossings installed experimentally throughout Louisiana between 1970 and 1984. These crossings were composed of various of rubber, high-density polyethylene (HDPE), precast concrete or steel plate construction and were installed under the varying ADT ...
  • The Use of Profiles for Metropolitan Transit Authority Analysis
    The Use of Profiles for Metropolitan Transit Authority Analysis
    Womack, Katie N. ;
    Tress, Mark Von
    1986-04-01 | PDF
    This report describes a methodology whereby transit systems were categorized into descriptive profiles on the basis of local socioeconomic and performance factors. The study showed that 267 transit systems in the U. S. can be profiled into seven categories based on nine socioeconomic/performance factors. Texas systems, with and without authority or ...
  • USSR Report Transportation
    USSR Report: Transportation
    United States. Foreign Broadcast Information Service  ...
    1986-04-01 | PDF
    JPRS publications contain information primarily from foreign newspapers, periodicals and books, but also from news agency transmissions and broadcasts. Materials from foreign-language sources are translated; those from English-language sources are transcribed or reprinted, with the original phrasing and other characteristics retained.This serial re ...
  • Research Notes Rockfall Under Control
    Research Notes: Rockfall Under Control
    Oregon State Highway Division. Research Section
    1986-04-01 | PDF
    To compensate for the Detroit Dam site (non-uniform slope), the standard catch fence design was modified in three ways: rock bolts anchored the fence posts where jack hammering a standard 3-foot hole would have been too costly and difficult; a triple twist (Gabion [TM] type) wire mesh was used for the screen instead of chain link fencing; and the s ...
  • Evaluation of bondcontrolled epoxycoated prestressing strand on Hubbard Creek Bridge interim report
    Evaluation of bond-controlled, epoxy-coated prestressing strand on Hubbard Creek Bridge : interim report.
    Petrak, Allison
    1986-04-01 | PDF
    No Description
  • Some Considerations of Equity in Financing and Providing Transit Service in Texas
    Some Considerations of Equity in Financing and Providing Transit Service in Texas
    Burke, Dock ;
    Womack, Katie N.
    1986-04-01 | PDF
    This report applies to Texas results from transit equity research done elsewhere in the U.S., principally by J. Pucher and S. Rock. Texas transit characteristics, ridership, and financing mechanisms, are used to develop an understanding of the equity implications of trends in the Texas transit industry. The equity outcome of transit finance and ope ...
  • Evaluation of Alternative Lighting Systems for Guide Sign Illumination
    Evaluation of Alternative Lighting Systems for Guide Sign Illumination
    Upchurch, Jonathan E. ;
    Bordin, Jeffrey T.
    1986-04-01 | PDF
    The study objective was to identify a lighting system which has a lower power cost and reduced maintenance requirements and which provides adequately for motorists' needs in terms of legibility and illumination level. Twenty-five candidate lighting systems were identified through a review of technical data and specifications for lamps and fixtures ...
  • Performance of Plastic Striping Tape
    Performance of Plastic Striping Tape
    Borg, Tim M.
    1986-04-01 | PDF
    Standard thermoplastic traffic marking stripe was compared with 3M "STAMARK" Brand 5730 plastic marking tape. Both products were placed on two new PCC pavement projects and evaluated over two years. The "STAMARK" was found to be more expensive, easier to place, just as durable, but less reflective at night than standard thermoplastic stripe.
  • USSR Report Transportation
    USSR Report: Transportation
    United States. Foreign Broadcast Information Service  ...
    1986-03-12 | PDF
    JPRS publications contain information primarily from foreign newspapers, periodicals and books, but also from news agency transmissions and broadcasts. Materials from foreign-language sources are translated; those from English-language sources are transcribed or reprinted, with the original phrasing and other characteristics retained.This serial re ...
  • Complex Monitoring Performance and the CoronaryProne Type a Behavior Pattern
    Complex Monitoring Performance and the Coronary-Prone Type a Behavior Pattern
    Thackray, Richard I. ;
    Touchstone, R. Mark
    1986-03-01 | PDF
    The present study examined the possible relationship of the coronary-prone Type A behavior pattern to performance of a complex monitoring task. The task was designed to functionally simulate the general task characteristics of future, highly automated air traffic control systems in which passive monitoring is expected to be a principal job requirem ...
  • Research Notes EpoxyCoated Strand Under Surveillance on Coast
    Research Notes: Epoxy-Coated Strand Under Surveillance on Coast
    Oregon State Highway Division. Research Section
    1986-03-01 | PDF
    Epoxy coating encases the steel to protect it from salt. Rebar with epoxy coating has been used for several years but coated prestressing strand is relatively new. There was little doubt the epoxy coating would protect the strand from corrosion. However, the question to be answered was how well the strand would bond with the concrete. The specified ...
  • Transportation of hazardous materials state and local activities
    Transportation of hazardous materials : state and local activities
    United States. Congress. Office of Technology Assessment
    1986-03-01 | PDF
    Report is the first of two Office of Technology Assessment (OTA) reportsexamining the transportation of hazardous materials in the U. S. in order toassist the Congress in its deliberations on reauthorization of the HazardousMaterials Transportation Act. This volume summarizes federal programs andidentifies three major areas of State and local gover ...
  • Cold Set Concrete
    Cold Set Concrete
    Beach, WG
    1986-03-01 | PDF
    Chemical additives are currently available which will cause Portland cement concretes to react, set and cure at temperatures below 0 deg C (32 deg F). Mixes have been developed which will gain strengths as high as 5000 PSI when placed and cured at below freezing temperatures. The work to date has not determined the long term freeze-thaw durability ...
  • OnRamp Traffic Control on Black Canyon Freeway
    On-Ramp Traffic Control on Black Canyon Freeway
    Rajan, Subramanjam D. ;
    Blackburn, Jack B.
    1986-03-01 | PDF
    This research implemented the ramp management strategy (RMS) developed in a previous study, on the Black Canyon Freeway. The software system developed by Safe-Trans was modified to include the RMS algorithm for controlling the entry of ramp vehicles according to speed-volume-occupancy relationships on the freeway. Decisions on metering rates were m ...
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