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Localized or Systemic {italic In Vivo} Heat-Inactivation of Human Immunodeficiency Virus (HIV): A Mathematical Analysis

Description: Temperatures as low as 42 C, maintained for a little as 25 minutes, inactivate {approx}25% of HIV. Furthermore, human immunodeficiency virus (HIV)-infected T-cells are more sensitive to heat than healthy lymphocytes and susceptibility increases when the cells are pre-sensitized by exposure to tumor necrosis factor. Thus, induction of a whole-body hyperthermia, or hyperthermia specifically limited to tissues having a high viral load, are potential antiviral therapies for acquired immunodeficienc… more
Date: December 15, 1993
Creator: Pennypacker, Carl R.; Perelson, A.S.; Nys, N.; Nelson, G. & Sessler, D.I.
Partner: UNT Libraries Government Documents Department
open access

Quantized conic sections; quantum gravity

Description: Starting from free relativistic particles whose position and velocity can only be measured to a precision < [Delta]r[Delta]v > [equivalent to] [plus minus] k/2 meter[sup 2]sec[sup [minus]1] , we use the relativistic conservation laws to define the relative motion of the coordinate r = r[sub 1] [minus] r[sub 2] of two particles of mass m[sub 1], m[sub 2] and relative velocity v = [beta]c = [sub (k[sub 1] + k[sub 2]])/ [sup (k[sub 1] [minus] k[sub 2]]) in terms of conic section equation v[sup 2] … more
Date: March 15, 1993
Creator: Noyes, H. Pierre
Partner: UNT Libraries Government Documents Department
open access

Testing of hollow clay tile masonry prisms

Description: This paper presents test results of 610-mm wide (24-in.) by 1219-mm high (48-in.) by 203-or 330-mm (8- or 13-in.) thick prisms constructed of hollow clay tiles. Three prisms were extracted fro existing hollow clay title walls and 69 were constructed in laboratories at The University of Tennessee and the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland. Modulus of Elasticity, E, and compressive strength f{prime}{sub m} were calculated from the results.
Date: October 15, 1993
Creator: Jones, W. D. & Butala, M. B.
Partner: UNT Libraries Government Documents Department
open access

[Draft minutes of IAPG Mechanical Working Group meeting]

Description: This report provides the draft minutes of the Interagency Advanced Power Group meeting held November 3--4, 1993. Topics addressed are: Materials for thermal management; photovoltaic programs in the Airforce; ground based radar advanced power system development program; battery research; generator prognostics & diagnostics equipment; a thermal flight experiment test program; power systems assessment; Overview: Phillip`s space thermal technologies branch; and development of actuator thermal manag… more
Date: December 15, 1993
Creator: Skinner, D. M.
Partner: UNT Libraries Government Documents Department
open access

A dedicated compressor monitoring system employing current signature analysis

Description: The use of motor current signature analysis (CSA) has been established as a useful method for periodic monitoring of electrically driven equipment. CSA is, moreover, especially well suited as the basis for a dedicated continuous monitoring system in an industrial setting. This paper presents just such an application that has been developed and installed in the US government uranium enrichment plant at Portsmouth, Ohio. The system, which is designed to detect specific axial-flow compressor probl… more
Date: April 15, 1993
Creator: Castleberry, K. N. & Smith, S. F.
Partner: UNT Libraries Government Documents Department
open access

Quantized conic sections; quantum gravity

Description: Starting from free relativistic particles whose position and velocity can only be measured to a precision < {Delta}r{Delta}v > {equivalent_to} {plus_minus} k/2 meter{sup 2}sec{sup {minus}1} , we use the relativistic conservation laws to define the relative motion of the coordinate r = r{sub 1} {minus} r{sub 2} of two particles of mass m{sub 1}, m{sub 2} and relative velocity v = {beta}c = {sub (k{sub 1} + k{sub 2}})/ {sup (k{sub 1} {minus} k{sub 2}}) in terms of conic section equation v{sup 2} … more
Date: March 15, 1993
Creator: Noyes, H. P.
Partner: UNT Libraries Government Documents Department
open access

The PHENIX experiment at RHIC

Description: Later this decade the Relativistic Heavy Ion Collider (RHIC) will be built at Brookhaven National Laboratory. Its goal will be to accelerate and collide Au beams at 100 GeV/c in an attempt to create a Quark Gluon Plasma (QGP). The PHENIX detector aims to detect the QGP through its leptonic and hadronic signatures. We describe here its physics capabilities and the details of the apparatus designed to pick out rare leptonic signatures from among hadronic multiplicities of up to 1500 particles per… more
Date: December 15, 1993
Creator: Tonse, S. R. & Thomas, J. H.
Partner: UNT Libraries Government Documents Department
open access

Mutagenic activity and heterocyclic amine content of the human diet

Description: The mutagenic activity and the mass amount of heterocyclic amines responsible for the mutagenic activity have been measured in some cooked foods. Cooked meats are the predominant source of mutagenic activity in the diet with values ranging from 0 to 10,000 revertants per gram reported in the Ames/Salmonelia test with strain TA98. Several heterocyclic amines are present and have been quantified using solid-phase extraction followed by HPLC. Frying at higher temperatures and for longer times prod… more
Date: January 15, 1993
Creator: Knize, M. G.; Dolbeare, F. A.; Cunningham, P. L. & Felton, J. S.
Partner: UNT Libraries Government Documents Department
open access

Toward a high performance distributed memory climate model

Description: As part of a long range plan to develop a comprehensive climate systems modeling capability, the authors have taken the Atmospheric General Circulation Model originally developed by Arakawa and collaborators at UCLA and have recast it in a portable, parallel form. The code uses an explicit time-advance procedure on a staggered three-dimensional Eulerian mesh. The authors have implemented a two-dimensional latitude/longitude domain decomposition message passing strategy. Both dynamic memory mana… more
Date: February 15, 1993
Creator: Wehner, M. F.; Ambrosiano, J. J.; Brown, J. C.; Dannevik, W. P.; Eltgroth, P. G.; Mirin, A. A. et al.
Partner: UNT Libraries Government Documents Department
open access

The Mobil Integrated C{sup 3} (command control and communications) and Security System

Description: The current political and economic situations suggest that significant reductions of nuclear forces outside the US will continue. This implies that in times of crisis the rapid deployment of nuclear weapons into a theater may be required. This paper describes a proposed Mobile Integrated C{sup 3} and Security System (MICSS). The MICSS, together with associated personnel, could satisfy the command and control and security requirements of a deployed nuclear operation. Rapid deployment poses uniqu… more
Date: June 15, 1993
Creator: Eras, A. & Brown, R. D.
Partner: UNT Libraries Government Documents Department
open access

Microstructurally based mechanisms for modeling shrinkage of cement paste at multiple levels

Description: Shrinkage of cement paste is controlled by a number of mechanisms that operate in various parts of the microstructure and at various length scales. A model for creep and shrinkage can be developed by combining several models that describe phenomena at each of several length scales, ranging from the nanometer to the meter. This model is described and preliminary results are discussed.
Date: July 15, 1993
Creator: Jennings, H. M. & Xi, Yunping
Partner: UNT Libraries Government Documents Department
open access

Automatic contact in DYNA3D for vehicle crashworthiness

Description: This paper presents a new formulation for the automatic definition and treatment of mechanical contact in explicit nonlinear finite element analysis. Automatic contact offers the benefits of significantly reduced model construction time and fewer opportunities for user error, but faces significant challenges in reliability and computational costs. This paper discusses in detail a new four-step automatic contact algorithm. Key aspects of the proposed method include automatic identification of ad… more
Date: July 15, 1993
Creator: Whirley, R. G. & Engelmann, B. E.
Partner: UNT Libraries Government Documents Department
open access

Actual Versus Predicted Impacts of Three Ethanol Plants on Aquatic and Terrestrial Resources

Description: To help reduce US dependence on imported petroleum, Congress passed the Energy Security Act of 1980 (public Law 96-294). This legislation authorized the US Department of Energy (DOE) to promote expansion of the fuel alcohol industry through, among other measures, its Alcohol Fuels Loan Guarantee Program. Under this program, selected proposals for the conversion of plant biomass into fuel-grade ethanol would be granted loan guarantees. of 57 applications submitted for loan guarantees to build an… more
Date: March 15, 1993
Creator: Eddlemon, Gerald K.; Webb, J. Warren; Hunsaker, Donald B., Jr. & Miller, Robert L.
Partner: UNT Libraries Government Documents Department
open access

Heterocyclic amine mutagenicity/carcinogenicity: Influence of repair, metabolism, and structure

Description: Cooking, heat processing, and pyrolysis of protein-rich foods induce the formation of structurally related heterocyclic aromatic amines that have been found to be mutagenic in bacteria, mammalian cells in culture and mice. All these compounds are potent mutagens and most are active below 1 ng/plate, in Ames/Salmonella tester strain TA1538 in the presence of S9 liver microsomal preparations from rat, mouse, or hamster. They are also potent in strains TA98, TA97, moderately active in TA1537, weak… more
Date: January 15, 1993
Creator: Felton, J. S.; Wu, R.; Knize, M. G.; Thompson, L. H. & Hatch, F. T.
Partner: UNT Libraries Government Documents Department
open access

A high performance communications and memory caching scheme for molecular dynamics on the CM-5

Description: In this paper, we provide a brief overview of our general molecular dynamics algorithm and focus on several performance enhancements that have allowed us to achieve high performance on the CM-5. Our use of the CM-5 vector units (VUs) to calculate forces is described along with a memory caching scheme that speeds up the force calculation by as much as 50%. In addition, we discuss a method used to speed up the communication aspects of our algorithm by more than 35%. Lastly, recent timing and scal… more
Date: September 15, 1993
Creator: Beazley, D. M.; Lomdahl, P. S.; Gronbech-Jensen, N. & Tamayo, P.
Partner: UNT Libraries Government Documents Department
open access

Gamma-ray optical counterpart search experiment (GROCSE)

Description: The requirements of a gamma-ray burst optical counterpart detector are reviewed. By taking advantage of real-time notification of bursts, new instruments can make sensitive searches while the gamma-ray transient is still in progress. A wide field of view camera at Livermore National Laboratories has recently been adapted for detecting GRB optical counterparts to a limiting magnitude of 8. A more sensitive camera, capable of reaching m{sub upsilon} = 14, is under development.
Date: December 15, 1993
Creator: Akerlof, C.; Fatuzzo, M.; Lee, B.; Bionta, R.; Ledebuhr, A.; Park, H. S. et al.
Partner: UNT Libraries Government Documents Department
open access

The hydrogen hybrid option

Description: The energy efficiency of various piston engine options for series hybrid automobiles are compared with conventional, battery powered electric, and proton exchange membrane (PEM) fuel cell hybrid automobiles. Gasoline, compressed natural gas (CNG), and hydrogen are considered for these hybrids. The engine and fuel comparisons are done on a basis of equal vehicle weight, drag, and rolling resistance. The relative emissions of these various fueled vehicle options are also presented. It is conclude… more
Date: October 15, 1993
Creator: Smith, J. R.
Partner: UNT Libraries Government Documents Department
open access

A survey of open problems in symplectic integration

Description: In the past few years there has been a substantial amount of research on symplectic integration. The subject is only part of a program concerned with numerically preserving a system`s inherent geometrical structures. Volume preservation, reversibility, local conservation laws for elliptic equations, and systems with integral invariants are but a few examples of such invariant structures. In many cases one requires a numerical method to stay in the smallest possible appropriate group of phase sp… more
Date: October 15, 1993
Creator: McLachlan, R. I. & Scovel, C.
Partner: UNT Libraries Government Documents Department
open access

Production and remediation of low-sludge, simulated Purex waste glasses, 1: Effects of sludge oxide additions on melter operation

Description: Glass produced during the Purex 4 campaigns of the Integrated Defense Waste Processing Facility (DWPF) Melter System (IDMS) and the 774 Research Melter contained a lower fraction of sludge components than targeted by the Product Composition Control System (PCCS). Purex 4 glass was more durable than the benchmark (EA) glass, but less durable than most simulated SRS high-level waste glasses. Also, Purex 4 glass was considerably less durable than predicted by the algorithm which will be used to co… more
Date: July 15, 1993
Creator: Ramsey, W. G.
Partner: UNT Libraries Government Documents Department
open access

Superconducting magnet system for the TPX Tokamak

Description: The Tokamak Physics Experiment (TPX) will be the first Tokamak using superconducting magnets for both the poloidal and toroidal field. It is designed for advanced Tokamak physics experiments in steady-state and long-pulse operation. The TPX superconducting magnets use an advanced cable-in-conduit conductor (CICC) design similar to that developed in support of the International Thermonuclear Experimental Reactor (ITER). The toroidal field magnets provide 4.0 T at 2.25 m with a stored energy of 1… more
Date: September 15, 1993
Creator: Hassenzahl, W. V.; Chaplin, M. R. & Heim, J. R.
Partner: UNT Libraries Government Documents Department
open access

Cement-aggregate compatibility and structure property relationships including modelling

Description: The role of aggregate, and its interface with cement paste, is discussed with a view toward establishing models that relate structure to properties. Both short (nm) and long (mm) range structure must be considered. The short range structure of the interface depends not only on the physical distribution of the various phases, but also on moisture content and reactivity of aggregate. Changes that occur on drying, i.e. shrinkage, may alter the structure which, in turn, feeds back to alter further … more
Date: July 15, 1993
Creator: Jennings, H. M. & Xi, Y.
Partner: UNT Libraries Government Documents Department
open access

Structural analysis of a superconducting central solenoid for the Tokamak Physics Experiment

Description: The Tokamak Physics Experiment (TPX) concept design uses superconducting coils to accomplish magnetic confinement. The central solenoid (CS) magnet is divided vertically into 8 equal segments which are powered independently. The eddy current heating from the pulsed operation is too high for a case type construction; therefore, a {open_quotes}no case{close_quotes} design has been chosen. This {open_quotes}no case{close_quotes} design uses the conductor conduit as the primary structure and the el… more
Date: September 15, 1993
Creator: O`Connor, T. G. & Heim, J. R.
Partner: UNT Libraries Government Documents Department
open access

Testing of ITER prototype cable-in-conduit conductors in the FENIX facility

Description: The Fusion Engineering International experiment (FENIX) Test Facility has been operational since 1991 at the Lawrence Livermore National Laboratory for testing the International Thermonuclear Experimental Reactor (ITER) prototype conductors. These conductors are designed to operate stably with transport current of more than 40 kA at a magnetic field of 13 T. The FENIX facility consists of four magnet sets that are configured to allow easy access to the 40-cm high-field region with a test cross-… more
Date: September 15, 1993
Creator: Shen, S. S.; Chaplin, M. R.; Felker, B.; Hassenzahl, W. V.; Kishiyama, K. I. & Parker, J. M.
Partner: UNT Libraries Government Documents Department
open access

Signal and background in NLO QCD for the search of the intermediate mass Higgs boson at the SSC

Description: The signal and background for the search of the Standard Model Higgs boson in the intermediate mass range 80 GeV < m{sub H} < 2M{sub Z} is studied based on calculations of the cross sections in next-to-leading order QCD perturbation theory for the production of the Higgs boson via gluon-gluon fusion and for the hadronic two-photon production. The method of Monte-Carlo integration allows the application of realistic cuts (p{sub T}, rapidity, photon isolation) to the cross section. Results are gi… more
Date: August 15, 1993
Creator: Bailey, B. & Graudenz, D.
Partner: UNT Libraries Government Documents Department
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