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The physical properties of microcellular composite foams

Description: Recently we reported on a method of preparing microcellular composite foams. In this procedure an open-celled polystyrene foam is prepared by the polymerization of a high-internal-phase water-in-oil emulsion containing styrene, divinylbenzene, surfactant, free-radial initiator and water. After drying, the cells of the polystyrene foam are then filled with other materials such as aerogel or resoles. The physical properties of these materials, e.g., surface area, density, thermal conductivity, an… more
Date: January 1, 1989
Creator: Nyitray, A.M.; Williams, J.M.; Onn, D.; Witek, A. (Los Alamos National Lab., NM (USA) & Delaware Univ., Newark, DE (USA). Applied Thermal Physics Lab.)
Partner: UNT Libraries Government Documents Department
open access

Soft x-ray emission from classical novae in outburst

Description: Theoretical modeling of novae in outburst predicts that they should be active emitters of radiation at soft x-ray wavelengths twice during their outburst. The first time occurs very early in the outburst when only a very sensitive all sky survey will be able to detect them. This period lasts only a few hours for the very fastest novae. They again become bright in x-rays late in the outburst when the remnant object becomes very hot and is still luminous. Both simulations and observations show th… more
Date: January 1, 1989
Creator: Starrfield, S. (Los Alamos National Lab., NM (USA) Arizona State Univ., Tempe, AZ (USA). Dept. of Physics and Astronomy); Truran, J.W. (Illinois Univ., Urbana, IL (USA). Dept. of Astronomy); Sparks, W.M. (Los Alamos National Lab., NM (USA)); Krautter, J. (Landessternwarte auf dem Koenigstuhl bei Heidelberg (Germany, F.R.)) & MacDonald, J. (Delaware Univ., Newark, DE (USA). Dept. of Physics and Ast
Partner: UNT Libraries Government Documents Department
open access

Molecular biology in studies of oceanic primary production

Description: Remote sensing and the use of moored in situ instrumentation has greatly improved our ability to measure phytoplankton chlorophyll and photosynthesis on global scales with high temporal resolution. However, the interpretation of these measurements and their significance with respect to the biogeochemical cycling of carbon relies on their relationship with physiological and biochemical processes in phytoplankton. For example, the use of satellite images of surface chlorophyll to estimate primary… more
Date: January 1, 1992
Creator: LaRoche, J.; Falkowski, P.G. (Brookhaven National Lab., Upton, NY (United States)) & Geider, R. (Delaware Univ., Lewes, DE (United States). Coll. of Marine Studies)
Partner: UNT Libraries Government Documents Department
open access

Reduction in global warming due to fuel economy improvements and emissions control of criteria pollutants: New US light-duty vehicles (1968--1991)

Description: This paper explores the impact of US emission controls and fuel economy improvements on the global warming potential (GWP) of new light-duty vehicles. Fuel economy improvements have reduced the GWP of both passenger cars and light-duty trucks by lowering the per mile emissions of carbon dioxide (CO{sub 2}). Further GWP reductions have been achieved by emission standards for criteria pollutants: carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NO{sub x}). The GWP of a criteria pollu… more
Date: January 1, 1992
Creator: Pitstick, M. E.; Santini, D. J. (Argonne National Lab., IL (United States)) & Chauhan, H. (Delaware Univ., Newark, DE (United States). Dept. of Civil Engineering)
Partner: UNT Libraries Government Documents Department
open access

A novel smoothing routine for the data processing in thermogravimetric analysis

Description: For a certain short interval of a TG scan, the correlation between mass and time is linear. A smoothing and filtering routine based on use of linear regression and error analysis was developed and successfully applied in the TG data processing. This method provides a filter to smooth the noise fluctuations and, at the same time, to introduce no distortions into the TGA experimental data. The computer program required is quite simple and effective. The method used in the program promises auto-co… more
Date: December 31, 1996
Creator: Wang, Keyu; Wang, Shaojie; Huang, He; Klein, M. T. & Calkins, W. H.
Partner: UNT Libraries Government Documents Department
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