UNT Libraries Government Documents Department - 14 Matching Results

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Alignment and micro-inspection system

Description: A video microscope system has been designed and installed in the C-tank, a 3-g, high-explosive firing chamber in HEAF (High Explosives Applications Facility in LLNL). This microscope system helps a great deal, not only for precision alignment of the laser beam on the minute target for the Fabry-Perot velocimeter, but also for in situ inspection of the target before and after the experiment. In addition, the video information can also be stored in the PC computer as database documentati
Date: September 15, 1998
Creator: Chau, H; Hodgin, R L & Moua, K
Item Type: Refine your search to only Report
open access

Application of system simulation for engineering the technical computing environment of the Lawrence Livermore National Laboratorie

Description: This report summarizes an investigation performed by Lawrence Livermore National Laboratory� s (LLNL) Scientific Computing & Communications Department (SCCD) and the Garland Location of Raytheon Systems Company (RSC) from April through August.1998. The study assessed the applicability and benefits of utilizing System Simulation in architecting and deploying technical computing assets at LLNL, particularly in support of the ASCI program and associated scientific computing needs. The recommendati… more
Date: September 15, 1998
Creator: Boyd, V.; Edmunds, T.; Minuzzo, K.; Powell, E. & Roche, L.
Item Type: Refine your search to only Report
open access

Comparison of Natural Convection Heat Exchangers for Solar Water Heating Systems

Description: Thermosyphon heat exchangers are used in indirect solar water heating systems to avoid using a pump to circulate water from the storage tank to the heat exchanger. In this study, the authors consider the effect of heat exchanger design on system performance. They also compare performance of a system with thermosyphon flow to the same system with a 40W pump in the water loop. In the first part of the study, the authors consider the impact of heat exchanger design on the thermal performance of bo… more
Date: September 15, 1998
Creator: Davidson, J. & Liu, W.
Item Type: Refine your search to only Report
open access

Decontamination of Radionuclides from Concrete During and After Thermal Treatment

Description: The objective was to clarify from the theoretical viewpoint the mechanical, diffusional, thermodynamic and electromagnetic aspects of the decontaminations problem, by means of developing a powerful computational model to evaluate the effect of a very rapid heating regime on the on the contaminated concrete walls or slabs. The practical objective was to assess the feasibility of the microwave heating scheme envisaged and determine its suitable parameters such as power and duration. This objectiv… more
Date: September 15, 1998
Creator: Bazant, Z. P.
Item Type: Refine your search to only Report
open access

[Develop mine communications system]. Final technical report

Description: The objective of this project was to develop, design, and build a system prototype to demonstrate the practicality of two-way, wireless through-the-earth communications between the interior of a mine and the surface. The system was to communicate data for process and environment monitoring and control, and provide real-time voice communication for emergency situations and for daily operations use. Transmitters and receivers were designed, built, and tested in actual mines. A wireless in-mine co… more
Date: September 15, 1998
Creator: Meiksin, Z.H.
Item Type: Refine your search to only Report
open access

Dickinson Pure Air Combustion ERIP technical progress report number 4 [for the reporting period 7/98 through 9/98]

Description: Research was focused on work done to date and melding with current market conditions and demand. The overall objective of this program is to demonstrate the feasibility of EnerTech`s combustion technology to produce clean energy efficiently and cost effectively from coal and/or other char slurry fuels. From the data generated in this project, EnerTech will be able to conduct preliminary engineering design work for a process development unit. The design work included simulations that optimize pr… more
Date: September 15, 1998
Creator: Klosky, M.
Item Type: Refine your search to only Report
open access

An Efficient Molecular Dynamics Scheme for Predicting Dopant Implant Profiles in Semiconductors

Description: The authors present a highly efficient molecular dynamics scheme for calculating the concentration profile of dopants implanted in group-IV alloy, and III-V zinc blende structure materials. The program incorporates methods for reducing computational overhead, plus a rare event algorithm to give statistical accuracy over several orders of magnitude change in the dopant concentration. The code uses a molecular dynamics (MD) model, instead of the binary collision approximation (BCA) used in implan… more
Date: September 15, 1998
Creator: Beardmore, K.M. & Gronbech-Jensen, N.
Item Type: Refine your search to only Article
open access

Final Report: Computer Games to Teach Geography: El Nino: Mysteries of the Pacific and Mysteries of the Antarctic, August 15, 1994 - June 20, 1998

Description: During the period covered by this project we have accomplished all the objectives described in our original proposal. The main achievement, however, has been to bring to the commercial market an excellent quality education software product. This highest level of quality has been recognized by the Software Publisher Association, which has awarded its most prestigious appreciation, the Codie Award, for our first product Ocean Expeditions: El Nino. With regards to commercialization, we have develo… more
Date: September 15, 1998
Creator: Gautier-Downes, Catherine
Item Type: Refine your search to only Report
open access

Managing America's solid waste

Description: This report presents an historical overview of the federal role in municipal solid waste management from 1965 to approximately 1995. Attention is focuses on the federal role in safeguarding public health, protecting the environment, and wisely using material and energy resources. It is hoped that this report will provide important background for future municipal solid waste research and development initiatives.
Date: September 15, 1998
Creator: Phillips, J. A.
Item Type: Refine your search to only Report
open access

MCFC component development at ANL.

Description: Argonne National Laboratory is developing advanced cathode and electrolyte components for the molten carbonate fuel cell (MCFC). Working in support of the MCFC developers, the goal of this effort is to extend the life of the MCFC cell and to improve its performance.
Date: September 15, 1998
Creator: Bloom, I.
Item Type: Refine your search to only Article
open access

Status and update of the National Ignition Facility radiation effects testing program

Description: We are progressing in our efforts to make the National Ignition Facility (NIF) available to the nation as a radiation effects simulator to support the Services needs for nuclear hardness and survivability testing and validation. Details of our program were summarized in a paper presented at the 1998 HEART Conference. This paper describes recent activities and up-dates plans for NIF radiation effects testing.
Date: September 15, 1998
Creator: Davis, J; Serduke, F & Wuest, C R
Item Type: Refine your search to only Article
open access

Structure of parallel-velocity-shear driven mode in toroidal plasmas

Description: It is shown that the Fourier-ballooning representation is appropriate for the study of short wavelength drift-like perturbation in toroidal plasmas with a parallel velocity shear (PVS). The radial structure of the mode driven by a PVS is investigated in a torus. The Reynolds stress created by PVS turbulence and proposed as one of the sources for a sheared poloidal plasma rotation is analyzed. It is demonstrated that a finite ion temperature may strongly enhance the Reynolds stress creation abil… more
Date: September 15, 1998
Creator: Dong, J.Q.; Xu, W.B.; Zhang, Y.Z. & Horton, W.
Item Type: Refine your search to only Report
open access

TAE Saturation of Alpha Particle Driven Instability in TFTR

Description: A nonlinear theory of kinetic instabilities near threshold [H.L. Berk, et al., Plasma Phys. Rep. 23, (1997) 842] is applied to calculate the saturation level of Toroidicity-induced Alfvén Eigenmodes (TAE) and be compared with the predictions of (delta)f method calculations [Y. Chen, Ph.D. Thesis, Princeton University, 1998]. Good agreement is observed between the predictions of both methods and the predicted saturation levels are comparable with experimentally measured amplitudes of the TAE osc… more
Date: September 15, 1998
Creator: Berk, H. L.; Chen, Y.; Gorelenkov, N. N. & White, R. B.
Item Type: Refine your search to only Report
open access

Two Methods for a First Order Hardware Gradiometer Using Two HTS SQUID's

Description: Two different systems for noise cancellation (first order gradiometers) have been developed using two similar high temperature superconducting (HTS) SQUIDs. ''Analog'' gradiometry is accomplished in hardware by either (1) subtracting the signals from the sensor and background SQUIDs at a summing amplifier (parallel technique) or (2) converting the inverted background SQUID signal to a magnetic field at the sensor SQUID (series technique). Balance levels achieved are 2000 and 1000 at 20 Hz for t… more
Date: September 15, 1998
Creator: Espy, M. A.; Flynn, E. R.; Kraus, R. H., Jr. & Matlachov, A.
Item Type: Refine your search to only Article
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