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Mathematical model for the transport of environmental plutonium

Description: From joint meeting of the American Nuclear Society and the Atomic Industrial Forum and Nuclear Energy Exhibition; San Francisco, California, USA (11 Nov 1973). A mathematical model describing the behavior of particulate Pu in the lower atmosphere is proposed which accounts for particles settling or impinging on the earth's surface as well as particle re-entrainment or resuspension. The assumptions used and system of equations derived are discussed. (LCL)
Date: April 30, 1974
Creator: Travis, J. R.
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Partner: UNT Libraries Government Documents Department
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Climate studies using a zonal atmospheric model

Description: The second generation zonal atmospheric model ZAM2 is being developed and applied to studies of the potential climatic impact of stratospheric injection of trace species by high altitude aircraft. The model is a two- dimensional general circulation model using a 5 deg latitude grid at nine pressure levels extending into the stratosphere. The effect of terms lost by zonal averaging is simulated by introduction of an eddy transport mechanism in which the eddy diffusion coefficient is a function o… more
Date: January 14, 1974
Creator: MacCracken, M.C. & Luther, F.M.
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Partner: UNT Libraries Government Documents Department
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Advances in the theory and modelling of pollutant-gas washout

Description: A program for evaluation of precipitation scavenging as a mechanism of removal of contaminants from power plant plumes has been in progress. This program began with field studies at the Keystone plant in Western Pennsylvania, which led to the development of new gas-washout models and related field studies at other locations. The progress of this program is described and some comparisons of measured SO/sub 2/ washout concentrations with those predicted by reversible and irreversible gas washout … more
Date: April 1, 1973
Creator: Hales, J M; Dana, M T & Wolf, M A
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Partner: UNT Libraries Government Documents Department
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Electrons at low altitudes: a difficult background problem for soft x-ray astronomy

Description: Quasi-trapped and precipitating electrons have been observed with rocket- borne x-ray asironomy detectors in the altitude range 150 to 500 km. Because the flights occurred at low magnetic latitudes the electrons were unexpected. Data from many flights are combined to derive altitude dependence, an average electron spec, trum, and variation with solar activity. Development of electronrejecting collimators is discussed, and laboratory and flight data on these collimators are presented. (auth)
Date: October 24, 1973
Creator: Seward, F. D.; Grader, R. J.; Toor, A.; Burginyon, G. A. & Hill, R. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Limits to Growth Issue

Description: This report, Limits to Growth, discusses the operation of a computer model o the world system, and the implications of the models's five subsystems- World Population, World Capital investment, World food production, World pollution, and World natural resources.
Date: April 1, 1974
Creator: Boesman, William C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Production and Properties of Ceramic Bodies of Alkaline Earth and Other Refractory Oxides

Description: Report discussing the properties and methods of forming ceramic bodies of alkaline earth and other refractory solids. These materials can be used for "reaction chambers, crucibles for melting metals, casting solids, insulation shields, thermocouple shields and other heat resistant bodies...High calcium lime was found to have the necessary chemical and thermal properties for many of the above uses."
Date: August 1945
Creator: Keller, W. H.; Peterson, David & Handlin, Louis
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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What is the spectrum of cold dark matter particles on Earth?

Description: It is argued that the spectrum of cold dark matter particles on Earth has peaks in velocity space associated with particles falling onto the Galaxy for the first time and with particles which have fallen in and out of the Galaxy only a small number of times in the past. Estimates are given for the sizes and velocity magnitudes of the first few peaks. The estimates are based on the secondary infall model of halo formation which has been generalized to include the effect of angular momentum.
Date: August 1, 1996
Creator: Sikivie, P.
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Partner: UNT Libraries Government Documents Department
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Magnetic reconnection in the terrestrial magnetosphere

Description: An overview is given of quantitative comparisons between measured phenomena in the terrestrial magnetosphere thought to be associated with magnetic reconnection, and related theoretical predictions based on Petschek's simple model. Although such a comparison cannot be comprehensive because of the extended nature of the process and the relatively few in situ multipoint measurements made to date, the agreement is impressive where comparisons have been possible. This result leaves little doubt tha… more
Date: January 1, 1984
Creator: Feldman, W.C.
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Partner: UNT Libraries Government Documents Department
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Computer-controlled sampling system for airborne radionuclides

Description: From nuclear science symposium; San Francisco, California, USA (14 Nov 1973). A computer-controlled air sampling system has been designed and is presently being constnacted. The self-contained, mobile system will collect and record data from eight meteorological sensors. This information will be used in the study of resuspen airborne activity. Air sampler operation will be based on comparisons between the meteorological data and the sampling criteria selected by the operator at the beginning of… more
Date: November 26, 1973
Creator: Koval, J. S.; Reichman, J. M. & Fry, C. O.
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Partner: UNT Libraries Government Documents Department
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Environmental analysis of the operation of the ERDA facilities in Oak Ridge

Description: An analysis of the environmental effects of current ERDA operations in Oak Ridge is being conducted to establish a baseline for the consideration of the environmental effects of additional facilities or modified operations in the future. An extensive ecological survey has been conducted for about one year; social and economic data were obtained; and an archaeological survey of the area was made. The facilities were described and the effluents associated with operations were quantified to the ex… more
Date: January 1, 1975
Creator: McWherter, J.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Some influences of regional boundary layer flow on atmospheric transport and dispersion

Description: From American Chemical Society 2nd joint conference on sensing of environmental pollutants; Washington, District of Columbia, USA (10 Dec 1973). The scales on which most atmospheric transport and diffusion work has been carried out have been either on the order of less than a few kilometers or over a few hundred kilometers. Only recently has serious attention been turned to the intermediate scale on the order of a few tens of kilometers. It is on this regional scale in the boundary layer of the… more
Date: January 1, 1973
Creator: Wendell, L. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Magnetopause structure and dynamics: Issues for GEM (geospace environment modeling)

Description: Recent multi-spacecraft observations of the magnetopause have allowed us to establish its structure and dynamical behavior. The magnetopause current sheet is thicker than expected, often ten magnetosheath ion gyroradii or more. One very important result has been the confirmation of magnetic reconnection in both its quasi- steady and transient forms. A boundary layer of magnetosheath-like plasma is often, but not always, observed earthward of the magnetopause current layer. There is considerable… more
Date: January 1, 1989
Creator: Elphic, R. C.
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Partner: UNT Libraries Government Documents Department
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