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Measurement of Low Level Explosives Reaction in Gauged Multi-Dimensional Steven Impact Tests

Description: The Steven Test was developed to determine relative impact sensitivity of metal encased solid high explosives and also be amenable to two-dimensional modeling. Low level reaction thresholds occur at impact velocities below those required for shock initiation. To assist in understanding this test, multi-dimensional gauge techniques utilizing carbon foil and carbon resistor gauges were used to measure pressure and event times. Carbon resistor gauges indicated late time low level reactions 200-540… more
Date: May 31, 2001
Creator: Niles, A M; Garcia, F; Greenwood, D W; Forbes, J W; Tarver, C M; Chidester, S K et al.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of MOSFETS and IGBTS for Pulsed Power Applications

Description: Single solid-state devices or arrays of solid-state devices are being incorporated into many pulsed power applications as a means of generating fast, high-power, high repetition-rate pulses and ultimately replacing hard tubes and thyratrons. While vendors' data sheets provide a starting point for selecting solid-state devices, most data sheets do not have sufficient information to determine performance in a pulsed application. To obtain this relevant information, MOSFET's and IGBT's from a numb… more
Date: May 31, 2001
Creator: Hickman, B. & Cook, E.
Partner: UNT Libraries Government Documents Department
open access

The China Motor Systems Energy Conservation Program: A major national initiative to reduce motor system energy use in China

Description: Electric motor systems are widely used in China to power fans, pumps, blowers, air compressors, refrigeration compressors, conveyers, machinery, and many other types of equipment. Overall, electric motor systems consume more than 600 billion kWh annually, accounting for more than 50 percent of China's electricity use. There are large opportunities to improve the efficiency of motor systems. Electric motors in China are approximately 2-4 percent less efficient on average than motors in the U.S. … more
Date: May 31, 2001
Creator: Nadel, Steven; Wang, Wanxing; Liu, Peter & McKane, Aimee T.
Partner: UNT Libraries Government Documents Department
open access

A Load Balanced Domain Decomposition Method Using Wavelet Analysis

Description: Wavelet Analysis provides an orthogonal basis set which is localized in both the physical space and the Fourier transform space. We present here a domain decomposition method that uses wavelet analysis to maintain roughly uniform error throughout the computation domain while keeping the computational work balanced in a parallel computing environment.
Date: May 31, 2001
Creator: Jameson, L; Johnson, J & Hesthaven, J
Partner: UNT Libraries Government Documents Department
open access

Reconstruction of FXR Beam Conditions

Description: Beam-envelope radius, envelope angle, and beam emittance can be derived from measurements of beam radius for at least three different transport conditions. We have used this technique to reconstruct exit parameters from the FXR injector and accelerator. We use a diamagnetic loop (DML) to measure the magnetic moment of the high current beam. With no assumptions about radial profile, we can derive the beam mean squire radius from the moment under certain easily met conditions. Since it is this pa… more
Date: May 31, 2001
Creator: Nexen, W E; Scarpetti, R D & Zentler, J
Partner: UNT Libraries Government Documents Department
open access

Pressure Wave Measurements from Thermal Cook-Off of an HMX Based High Explosive PBX 9501

Description: A better understanding of thermal cook-off is important for safe handling and storing explosive devices. A number of safety issues exist about what occurs when a cased explosive thermally cooks off. For example, violence of the events as a function of confinement are important for predictions of collateral damage. This paper demonstrates how adjacent materials can be gauged to measure the resulting pressure wave and how this wave propagates in this adjacent material. The output pulse from the t… more
Date: May 31, 2001
Creator: Garcia, F.; Forbes, J. W.; Tarver, Craig M.; Urtiew, P. A.; Greenwood, D. W. & Vandersall, K. S.
Partner: UNT Libraries Government Documents Department
open access

CYP1B1 expression, a potential risk factor for breast cancer

Description: CYP1B1 expression in non-tumor breast tissue from breast cancer patients and cancer-free individuals was determined to test the hypothesis that high CYP1B1 expression is a risk factor for breast cancer. Large interindividual variations in CYP1B1 expression were found with CYP1B1 levels notably higher in breast cancer patients than cancer-free individuals. The results indicate that CYP1B1 might play a role in breast cancer either through increased PAH activation or through metabolism of endogeno… more
Date: May 31, 2001
Creator: Goth-Goldstein, Regine; Erdmann, Christine A. & Russell, Marion
Partner: UNT Libraries Government Documents Department
open access

Making industrial energy efficiency mainstream and profitable: Where public benefit and private interests intersect

Description: In 1996, the US Department of Energy s Office of Industrial Technologies (OIT) Motor Challenge program began a unique collaboration with industry called the Allied Partner program. Partnerships were sought with equipment suppliers and manufacturers, utilities, consultants, and state agencies that had extensive existing relationships with industrial customers. Partners were neither paid nor charged a fee for participation. The assumption was that these relationships could serve as the foundation… more
Date: May 31, 2001
Creator: McKane, Aimee T.; Tutterow, Vestal & Cockrill, Chris
Partner: UNT Libraries Government Documents Department
open access

The D-Zero Run II Detector and physics prospects

Description: The DO Detector at Fermilab is currently undergoing an extensive upgrade to participate in the Run II data taking which shall begin on March 1, 2001. The design of the detector meets the requirements of the high luminosity environment provided by the accelerator. This paper describes the upgraded detector subsystems and gives a brief outline of the physics prospects associated with the upgrade.
Date: May 31, 2001
Creator: Parashar, Neeti
Partner: UNT Libraries Government Documents Department
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