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Articles 181 - 208 of 208
Full-Text Articles in Chemistry
Epa Overestimates The Benefit Of Biennial Inspection And Maintenance, Donald H. Stedman
Epa Overestimates The Benefit Of Biennial Inspection And Maintenance, Donald H. Stedman
Fuel Efficiency Automobile Test Publications
The United States Environmental Protection Agency (EPA) computer model of mobile source emissions is used to estimate the benefits of future emissions control programs. Four input assumptions are discussed, each of which tends to overestimate the benefits of biennial testing programs. The assumptions are: each model year drives the same number of miles; high/superemitters, absent initially, increase linearly with mileage; inspection and maintenance (I/M) readings are invariant, and I/M repairs last forever. States opting for these programs should be aware that the predicted benefits may not materialize.
On-Road Remote Sensing Of Vehicle Emissions In Monterrey, N. L. Mexico, Gary A. Bishop, Donald H. Stedman
On-Road Remote Sensing Of Vehicle Emissions In Monterrey, N. L. Mexico, Gary A. Bishop, Donald H. Stedman
Fuel Efficiency Automobile Test Publications
No abstract provided.
Remote Sensing: A Simpler Way To Reduce Air Pollution, Donald H. Stedman, Gary A. Bishop
Remote Sensing: A Simpler Way To Reduce Air Pollution, Donald H. Stedman, Gary A. Bishop
Fuel Efficiency Automobile Test Publications
No abstract provided.
Playing With Fire, Science And Politics Of Air Pollution From Cars, Donald H. Stedman
Playing With Fire, Science And Politics Of Air Pollution From Cars, Donald H. Stedman
Fuel Efficiency Automobile Test Publications
No abstract provided.
Vehicle Measurements For Co, Hc And No In El Paso, Texas And Juarez, Mexico, Donald H. Stedman, Yi Zhang, Jon M. Lesko
Vehicle Measurements For Co, Hc And No In El Paso, Texas And Juarez, Mexico, Donald H. Stedman, Yi Zhang, Jon M. Lesko
Fuel Efficiency Automobile Test Publications
No abstract provided.
Automobile Emissions In Tulsa, Oklahoma, Donald H. Stedman, Peter J. Popp, Paul L. Guenther
Automobile Emissions In Tulsa, Oklahoma, Donald H. Stedman, Peter J. Popp, Paul L. Guenther
Fuel Efficiency Automobile Test Publications
No abstract provided.
Determination Of Parameters Influencing The Vehicle Emissions In Greece Using A Remote Sensing System, Kostas Nikolaou, Donald H. Stedman, Stavros Papaioannou, Nikos Zoumakis, Apostolos Kelesis
Determination Of Parameters Influencing The Vehicle Emissions In Greece Using A Remote Sensing System, Kostas Nikolaou, Donald H. Stedman, Stavros Papaioannou, Nikos Zoumakis, Apostolos Kelesis
Fuel Efficiency Automobile Test Publications
No abstract provided.
Tucson Intersection Study Of Automobile Emissions, Amber K. Hodgson, Yi Zhang, Donald H. Stedman
Tucson Intersection Study Of Automobile Emissions, Amber K. Hodgson, Yi Zhang, Donald H. Stedman
Fuel Efficiency Automobile Test Publications
No abstract provided.
On-Road Remote Sensing Of Co And Hc Emissions In California, Donald H. Stedman, Gary A. Bishop, Stuart P. Beaton, James E. Peterson, Paul L. Guenther, Iain F. Mcvey, Yi Zhang
On-Road Remote Sensing Of Co And Hc Emissions In California, Donald H. Stedman, Gary A. Bishop, Stuart P. Beaton, James E. Peterson, Paul L. Guenther, Iain F. Mcvey, Yi Zhang
Fuel Efficiency Automobile Test Publications
No abstract provided.
On-Road Nox Emissions Intercomparison Of On-Board Measurements And Remote Sensing, James W. Butler, Christine A. Gierczak, Gerald Jesion, Donald H. Stedman, Jon M. Lesko
On-Road Nox Emissions Intercomparison Of On-Board Measurements And Remote Sensing, James W. Butler, Christine A. Gierczak, Gerald Jesion, Donald H. Stedman, Jon M. Lesko
Fuel Efficiency Automobile Test Publications
No abstract provided.
On-Road Carbon Monoxide And Hydrocarbon Remote Sensing In The Chicago Area In 1992, Donald H. Stedman, Yi Zhang, Gary A. Bishop, Stuart P. Beaton, Paul L. Guenther
On-Road Carbon Monoxide And Hydrocarbon Remote Sensing In The Chicago Area In 1992, Donald H. Stedman, Yi Zhang, Gary A. Bishop, Stuart P. Beaton, Paul L. Guenther
Fuel Efficiency Automobile Test Publications
No abstract provided.
Remote Sensing Of Vehicle Emissions, Case Study: Thessaloniki, Greece (Presentation), Kostas Nikolaou, Donald H. Stedman
Remote Sensing Of Vehicle Emissions, Case Study: Thessaloniki, Greece (Presentation), Kostas Nikolaou, Donald H. Stedman
Fuel Efficiency Automobile Test Publications
No abstract provided.
Melbourne Automobile Emissions Study, Donald H. Stedman, Yi Zhang
Melbourne Automobile Emissions Study, Donald H. Stedman, Yi Zhang
Fuel Efficiency Automobile Test Publications
No abstract provided.
Remote Sensing Of On-Road Vehicle Emissions, Donald H. Stedman, Gary A. Bishop, Paul L. Guenther, James E. Peterson, Stuart P. Beaton, Iain F. Mcvey
Remote Sensing Of On-Road Vehicle Emissions, Donald H. Stedman, Gary A. Bishop, Paul L. Guenther, James E. Peterson, Stuart P. Beaton, Iain F. Mcvey
Fuel Efficiency Automobile Test Publications
No abstract provided.
On-Road Remote Sensing Of Co Emissions In The Los Angeles Basin, Donald H. Stedman, Gary A. Bishop, James E. Peterson, Paul L. Guenther
On-Road Remote Sensing Of Co Emissions In The Los Angeles Basin, Donald H. Stedman, Gary A. Bishop, James E. Peterson, Paul L. Guenther
Fuel Efficiency Automobile Test Publications
The University of Denver remote sensor for on-road motor vehicle carbon monoxide emissions was used for eleven days in the Los Angeles Basin in December, 1989. The remote sensor has been incorporated into the 1990 Clean Air Act Amendments as "on-road emissions testing". The device measures the CO/CO2 ratio for one-half second behind each vehicle, from which the exhaust %CO is calculated. Vehicles were measured in a mix of many driving modes and speeds ranging from deceleration coming up to a red traffic light through idling in heavy congestion up to accelerations and cruises entering a freeway ramp at …
Automobile Pollution Is A Disease, Donald H. Stedman
Automobile Pollution Is A Disease, Donald H. Stedman
Fuel Efficiency Automobile Test Publications
Brief article printed on a grocery bag in Benicia, CA.
Evaluation Of A Remote Sensor For Mobile Source Co Emissions, Donald H. Stedman, Gary A. Bishop, Marc Pitchford
Evaluation Of A Remote Sensor For Mobile Source Co Emissions, Donald H. Stedman, Gary A. Bishop, Marc Pitchford
Fuel Efficiency Automobile Test Publications
Carbon monoxide (CO) emission measurements of thousands of vehicles per day are possible with a recently evaluated remote sensor developed at the University of Denver. Funded by the Environmental Monitoring Systems Laboratory - Las Vegas (EMSL- LV) Innovative Research Program, the evaluation has demonstrated the comparability of volume concentration measurements made by this method with traditional emission monitoring instrumentation. Measurements are made unobtrusively as vehicles pass through an infrared light beam directed across one traffic lane about 25 centimeters above the pavement. A video camera records the vehicle registration number of each vehicle as its CO emissions are measured so …
Remote Sensing Enhanced Motor Vehicle Emissions Control For Pollution Reduction In The Chicago Metropolitan Area: Siting And Issue Analysis, Carol E. Lyons, Donald H. Stedman
Remote Sensing Enhanced Motor Vehicle Emissions Control For Pollution Reduction In The Chicago Metropolitan Area: Siting And Issue Analysis, Carol E. Lyons, Donald H. Stedman
Fuel Efficiency Automobile Test Publications
No abstract provided.
Automobile Emissions In Mexico City, Stuart P. Beaton, Gary A. Bishop, Donald H. Stedman
Automobile Emissions In Mexico City, Stuart P. Beaton, Gary A. Bishop, Donald H. Stedman
Fuel Efficiency Automobile Test Publications
No abstract provided.
On-Road Carbon Monoxide And Hydrocarbon Remote Sensing In The Chicago Area, Donald H. Stedman, Gary A. Bishop, James E. Peterson, Paul L. Guenther, Iain F. Mcvey, Stuart P. Beaton
On-Road Carbon Monoxide And Hydrocarbon Remote Sensing In The Chicago Area, Donald H. Stedman, Gary A. Bishop, James E. Peterson, Paul L. Guenther, Iain F. Mcvey, Stuart P. Beaton
Fuel Efficiency Automobile Test Publications
No abstract provided.
Spreadsheets And Their Relation To Reality (Presentation), Donald H. Stedman, Gary A. Bishop, James E. Peterson, Paul L. Guenther
Spreadsheets And Their Relation To Reality (Presentation), Donald H. Stedman, Gary A. Bishop, James E. Peterson, Paul L. Guenther
Fuel Efficiency Automobile Test Publications
No abstract provided.
An Analysis Of On-Road Remote Sensing As A Tool For Automobile Emissions Control, Donald H. Stedman, Gary A. Bishop
An Analysis Of On-Road Remote Sensing As A Tool For Automobile Emissions Control, Donald H. Stedman, Gary A. Bishop
Fuel Efficiency Automobile Test Publications
No abstract provided.
Evaluation Of A Remote Sensor For Mobile Source Co Emissions, Donald H. Stedman, Gary A. Bishop
Evaluation Of A Remote Sensor For Mobile Source Co Emissions, Donald H. Stedman, Gary A. Bishop
Fuel Efficiency Automobile Test Publications
No abstract provided.
Automobile Testing In The Toronto Area, Donald H. Stedman, Gary A. Bishop
Automobile Testing In The Toronto Area, Donald H. Stedman, Gary A. Bishop
Fuel Efficiency Automobile Test Publications
No abstract provided.
Optimization Of The Tungstic Acid Denuder Technique For The Measurement Of Atmospheric Ammonia, Patricia Diane Roberts
Optimization Of The Tungstic Acid Denuder Technique For The Measurement Of Atmospheric Ammonia, Patricia Diane Roberts
Chemistry & Biochemistry Theses & Dissertations
Measurement of - atmospheric ammonia with the tungstic acid denuder technique is discussed. Characterization of denuder tubes for manual sampling in terms of, repeatability, reliability and the development of ammonia blank signals was determined. Field testing of the manual sampling apparatus was performed at ground test sites and in a biomass burn smoke plume. Ammonia emissions from biomass burning are discussed.
Fuel Efficiency Automobile Testing (F.E.A.T.), Donald H. Stedman, Gary A. Bishop, James A. Armstrong, Jackie Maddox
Fuel Efficiency Automobile Testing (F.E.A.T.), Donald H. Stedman, Gary A. Bishop, James A. Armstrong, Jackie Maddox
Fuel Efficiency Automobile Test Publications
No abstract provided.
The Temporal And Spatial Distribution Of Hydrocarbons In Atmospheric Deposition From Stations Surrounding Lower Chesapeake Bay, David Benjamin Webber
The Temporal And Spatial Distribution Of Hydrocarbons In Atmospheric Deposition From Stations Surrounding Lower Chesapeake Bay, David Benjamin Webber
OES Theses and Dissertations
Hydrocarbon concentrations were determined in bulk, wet, and dry deposition samples from urban and non-urban locations surrounding lower Chesapeake Bay. Mean hydrocarbon concentrations in bulk deposition samples were over three times greater at the urban station indicating a localized source. The major hydrocarbons present were n-alkanes, polycyclic aromatic hydrocarbons (PAH), and the unresolved complex mixture (UCM). The PAH and the UCM were an indication of significant anthropogenic inputs while the odd/even distribution of the n-alkanes was an indication of biogenic sources. These findings indicated seasonal trends of highest biogenic hydrocarbon inputs in the spring and summer months and highest anthropogenic …
The Carbon Compounds Of The Primeval Atmosphere, James Sherman Rogers
The Carbon Compounds Of The Primeval Atmosphere, James Sherman Rogers
University of the Pacific Theses and Dissertations
The question of how and when life originated on t his planet has always been an intriguing one, exceeded perhaps in fascination only by that area of speculation which concerns itself with death and the afterlife . The latter problem has generally been approached along theological lines; the former problem , that of the origin of life, has been widely investigated along scientific lines as well . Indeed, the origin of life has always been one of the fundamental problems of science, and the increasingly sophisticated answers to the problem reflect the increasing potence and applicability of the methods of …