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Steady-State Thermomechanical Finite Element Analysis of Elastoviscoplastic Metal Forming Processes

Description: Extrusion and rolling processes exhibiting large amounts of plastic flow are analyzed using a finite element technique that is based on a modified creeping viscous flow approximation. The technique, called the initial stress-rate method, iteratively corrects creeping viscous flow solutions to generate results that include elastic response. The momentum equations have been coupled with the energy equation to provide the capability to predict thermomechanical response during forming operations.
Date: January 1, 1977
Creator: Dawson, P.R. & Thompson, E.G.
Partner: UNT Libraries Government Documents Department
open access

Influence of Geometry on Natural Convection in Buildings

Description: Strong free convection airflows occur within passive solar buildings resulting from elevated temperatures of surfaces irradiated by solar energy compared with the cooler surfaces not receiving radiation. The geometry of a building has a large influence on the directions and magnitudes of natural airflows, and thus heat transfer between zones. This investigation has utilized a variety of reduced-scale building configurations to study the effects of geometry on natural convection heat transfer. S… more
Date: January 1, 1985
Creator: White, M. D.; Winn, C. B.; Jones, G. F. & Balcomb, J. D.
Partner: UNT Libraries Government Documents Department
open access

Rapid estimation of /sup 226/Ra in soil for the Grand Junction RASA/UMTRA project

Description: The Radiological Survey Activities (RASA) Group of the Health and Safety Research Division at Oak Ridge National Laboratory (ORNL) is an Inclusion Survey Contractor (ISC) for the Uranium Mill Tailings Remedial Action Program (UMTRAP). The purpose of the ISC is to survey designated sites potentially contaminated with radioactive material originating from the 24 inactive uranium mill sites and make recommendations as to whether the site should be included in or excluded from further consideration… more
Date: January 1, 1986
Creator: Kark, J.B.; Borak, T.B.; Kearney, P.D. & Rood, A.S.
Partner: UNT Libraries Government Documents Department
open access

Comparative Performance of Two Types of Evacuated Tube Solar Collectors in a Residential Heating and Cooling System - The Progress Report

Description: Two types of evacuated tube solar collectors have been operated in space heating, cooling and domestic hot water heating systems in Colorado State University Solar House I. An experimental collector from Corning Glass Works supplied heat to the system from January 1977 through February 1978, and an experimental collector from Philips Research Laboratory, Aachen, which is currently in use, has been operating since August 1978. A flat absorber plate inside a single-walled glass tube is used in th… more
Date: January 1, 1979
Creator: Conway, T. M.; Duff, W. S.; Loef, G. O. G. & Pratt, R. G.
Partner: UNT Libraries Government Documents Department
open access

Comparison of the Response of a Nai Scintillation Crystal With a Pressurized Ionization Chamber as a Function of Altitude, Radiation Level and RA-226 Concentration

Description: The Grand Junction Uranium Mill Tailings Remedial Action-Radiological Survey Activities Group (UMTRA-RASA) program employs a screening method in which external exposure rates are used to determine if a property contaminated with uranium mill tailings is eligible for remedial action. Portable NaI detectors are used by survey technicians to locate contaminated areas and determine exposure rates. The exposure rate is calculated using a regression equation derived from paired measurements made with… more
Date: January 1, 1986
Creator: Provencher, R.; Smith, G.; Borak, T.B. & Kearney, P.
Partner: UNT Libraries Government Documents Department
open access

Characterization of Fly Ash From Coal Combustion

Description: Fly ash derived from coal combustion contains predominantly spherical particles which consist of an insoluble aluminosilicate glass containing several mineral impurities. An outer layer, 50 to 300 A thick, is rich in many potentially toxic trace elements in the form of simple and complex sulfates. This layer, which is soluble in water, contains essentially all of the particulate sulfur present in fly ash in the form of sulfate. The actual mechanism(s) of formation of particulate sulfate salts a… more
Date: January 1, 1978
Creator: Natusch, D. F.S.
Partner: UNT Libraries Government Documents Department
open access

General Circulation of the Atmosphere and Weather in the Mediterranean

Description: The occurrence of mistral winds in the Mediterranean shows a correlation with blocking activity over the eastern Atlantic. Apparently for this reason periods with a ''midwinter dip'' in the zonal available potential energy of the northern hemisphere are favored by mistral occurrence. There also is a tendency for a 22- to 26-day cycle to appear in pressure gradients at the 500- and 100-mb surfaces along the southern coast of France. Such pressure gradients, if they exceed a c… more
Date: January 1, 1976
Creator: Reiter, Elmar R.
Partner: UNT Libraries Government Documents Department
open access

Investigation of the Pathway of Contaminated Soil Transported to Plant Surfaces by Raindrop Splash

Description: The environmental transport pathway of soil-borne radioisotopes to vegetation surfaces via raindrop splash was studied. The data show that soil can significantly contribute to the contamination found on plants. Further detailed study is needed to calculate the rate constant for the raindrop splash and retention pathways. 8 references, 1 figure. (ACR)
Date: October 21, 1983
Creator: Dreicer, M.; Hakonson, T. E.; Whicker, F. W. & White, G. C.
Partner: UNT Libraries Government Documents Department
open access

VXD3: The SLD Vertex Detector Upgrade Based on a 307 MPixel CCD System

Description: The SLD upgrade CCD vertex detector (VXD3) is described. Its 307 million pixels are assembled from 96 3.2 Mpixel CCDs of 13 cm{sup 2} each. The system has evolved from the pioneering CCD vertex detector VXD2, which has operated in SLD since 1992. The CCDs of VXD3 are mounted on beryllium ladders in three cylinders, providing three space point measurements along each track of about 5 microns resolution in all three co-ordinates. Significant improvements are achieved with VXD3 in impact parameter… more
Date: December 1995
Creator: Brau, James E.
Partner: UNT Libraries Government Documents Department
open access

Pathway: A Simulation Model of Radionuclide-Transport Through Agricultural Food Chains

Description: PATHWAY simulates the transport of radionuclides from fallout through an agricultural ecosystem. The agro-ecosystem is subdivided into several land management units, each of which is used either for grazing animals, for growing hay, or for growing food crops. The model simulates the transport of radionuclides by both discrete events and continuous, time-dependent processes. The discrete events include tillage of soil, harvest and storage of crops,and deposition of fallout. The continuous proces… more
Date: January 1, 1982
Creator: Kirchner, T. B.; Whicker, F. W. & Otis, M. D.
Partner: UNT Libraries Government Documents Department
open access

Numerical Calculation of the Three Dimensional Electrical Field in the Central Region of a Cyclotron

Description: To provide detailed and accurate electric fields in the ion source-puller region and at the dee dummy-dee gap for a cyclotron, a relaxation method solution of Laplace's equation has been used. A conventional difference equation with variation in mesh size and relaxation factor as well as different schemes for boundary corrections have been developed to achieve roughly 1 percent accuracy for a thre-dimensional domain with 10/sup 6/ mesh points. Although the computation requires considerable comp… more
Date: January 1, 1981
Creator: Chen, M. & Lind, D. A.
Partner: UNT Libraries Government Documents Department
open access

[Page from The Art Digest]

Description: A page from The Art Digest about the 44th Annual Exhibition Denver Art Museum which mentions Compton's woodcarving, Juju.
Date: August 1, 1938
Partner: UNT Libraries Special Collections
open access

Direct Conversion of Methane to Methanol in a Non-Isothermal Catalytic Membrane Reactor

Description: The direct partial oxidation of CH{sub 4} to CH{sub 3}OH has been studied in a non-permselective, non-isothermal catalytic membrane reactor system. A cooling tube introduced coaxially inside a tubular membrane reactor quenches the product stream rapidly so that further oxidation of CH{sub 3}OH is inhibited. Selectivity for CH{sub 3}OH formation is significantly higher with quenching than in experiments without quenching. For CH{sub 4} conversion of 4% to 7% CH{sub 3}OH selectivity is 40% to 50%… more
Date: December 31, 1993
Creator: Noble, R. D. & Falconer, J. L.
Partner: UNT Libraries Government Documents Department
open access

"Near-Death Experiences with Hallucinatory Features" Defended

Description: Article purporting that near-death experience (NDE) reports are sometimes open to multiple interpretations, that different kinds of NDEs should be distinguished according to their diverse physiological mechanisms, and that transformations following NDEs but not other hallucinatory experiences require special explanation if NDEs are hallucinations.
Date: Autumn 2007
Creator: Augustine, Keith
Partner: UNT Libraries
open access

On the Mind/Body Problem: The Theory of Essence

Description: Article exploring the classical mind/body problem using instances of the near-death experience (NDE) as experimental data. Comparison of the details of the NDE with predictions from theoretical cosmology shows strong similarities between the two and further strengthens the case for dualism. A theory of human nature is proposed that incorporates these similarities.
Date: Autumn 1992
Creator: Arnette, J. Kenneth
Partner: UNT Libraries
open access

Inner Communications Following the Near-Death Experience

Description: Article describing three individuals who reported experiencing inner communications subsequent to their near-death experiences (NDEs), and suggesting that these inner messages may be a form of intuition, encouraging further research into this phenomena.
Date: Summer 1998
Creator: Liester, Mitchell B.
Partner: UNT Libraries
open access

Near-Death Experiences with Hallucinatory Features

Description: Article surveying near-death experiences (NDEs) incorporating out-of-body discrepancies, bodily sensations, encounters with living persons and fictional characters, random or insignificant memories, returns from a point of no return, hallucinatory imagery, and unfulfilled predictions. Though attempts to accommodate hallucinatory NDEs within a survivalist framework are possible, they signal a failure to take the empirical evidence against a survivalist interpretation of NDEs seriously.
Date: Autumn 2007
Creator: Augustine, Keith
Partner: UNT Libraries
open access

Does Paranormal Perception Occur in Near-Death Experiences?

Description: Article that serves as Part 1 of a critique of survivalist interpretations of near-death experiences (NDEs), reviews the quality of the evidence for veridical observations during NDEs, and finds the case for veridical paranormal perception during NDEs wanting.
Date: Summer 2007
Creator: Augustine, Keith
Partner: UNT Libraries
open access

The Theory of Essence. [Part] 2. An Electromagnetic-Quantum Mechanical Model of Interactionism

Description: Article discussing the theory of essence, based on the physics of electromagnetism and quantum mechanics, which solves the problem of interaction resulting from Descartes's dualistic conception of human nature. The theory is empirically based in phenomena consistently reported by near-death experiencers.
Date: Winter 1995
Creator: Arnette, J. Kenneth
Partner: UNT Libraries
open access

Zeolite Membranes for Gas Separations

Description: Silicalite-1, a pure silica zeolite, was deposited on a tubular, asymmetric, {gamma}-alumina support. Single gas permeation experiments with N{sub 2}, CH{sub 4}, and CO{sub 2} were carried out on the membrane. Separation experiments for N{sub 2}/CH{sub 4} mixtures were also conducted. Single-gas permeation of H{sub 2} and separation of H{sub 2}/SF{sub 6} mixture were also carried out with the membrane. Composite membranes of silicalite and Ni-SAPO-34 were also fabricated, but no CO{sub 2}/H{sub… more
Date: June 1, 1995
Creator: Falconer, J. & Noble, R.
Partner: UNT Libraries Government Documents Department
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