304 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Performance"  
prev Results: 289 - 304
open access

Commissioning results of the narrow-band beam position monitor system upgrade in the APS storage ring.

Description: When using a low emittance storage ring as a high brightness synchrotron radiation source, it is critical to maintain a very high degree of orbit stability, both for the short term and for the duration of an operational fill. A fill-to-fill reproducibility is an additional important requirement. Recent developments in orbit correction algorithms have provided tools that are capable of achieving a high degree of orbit stability. However, the performance of these feedback systems can be severely … more
Date: April 20, 1999
Creator: Singh, O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of precipitated iron Fischer-Tropsch catalysts. Quarterly technical progress report, 1 July 1995--30 September 1995

Description: The following accomplishments were made on task 4. Reproducibility of Catalyst Preparation: (1) Five slurry reactor tests were completed. Three tests were conducted using catalyst C (100 Fe/3 Cu/4 K/16 SiO{sub 2}) from three different batches (runs SB-2695, SB-2145 and SA-2715), and two tests were conducted with catalyst B (100 Fe/5 Cu/6 K/24 SiO{sub 2}) from two different preparation batches (runs SA-2615 and SB-2585). Performance of catalysts from different batches (activity, selectivity and … more
Date: December 20, 1995
Creator: Bukur, D.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of a video-based slurry sensor for on-line ash analysis. Fourth quarter technical progress report, July 1--September 30, 1995

Description: Automatic control of fine coal cleaning circuits has traditionally been limited by the lack of sensors for on-line ash analysis. Although several nuclear-based analyzers are available, none have seen widespread acceptance. This is largely due to the fact that nuclear sensors are expensive and tend to be influenced by changes in seam type and pyrite content. Recently, researchers at VPI and SU have developed an optical sensor for phosphate analysis. The sensor uses image processing technology to… more
Date: October 20, 1995
Creator: Adel, G. T. & Luttrell, G. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of high data readout rate pixel module and detector hybridization at Fermilab

Description: This paper describes the baseline design and a variation of the pixel module to handle the data rate required for the BTeV experiment at Fermilab. The present prototype has shown good electrical performance characteristics. Indium bump bonding is proven to be capable of successful fabrication at 50 micron pitch on real detectors. For solder bumps at 50 micron pitch, much better results have been obtained with the fluxless PADS processed detectors. The results are adequate for our needs and our … more
Date: March 20, 2001
Creator: al., Sergio Zimmermann et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Battery Usage and Thermal Performance of the Toyota Prius and Honda Insight for Various Chassis Dynamometer Test Procedures: Preprint

Description: This study describes the results from the National Renewable Energy Laboratory's (NREL) chassis dynamometer testing of a 2000 model year Honda Insight and 2001 model year Toyota Prius. The tests were conducted for the purpose of evaluating the battery thermal performance, assessing the impact of air conditioning on fuel economy and emissions, and providing information for NREL's Advanced Vehicle Simulator (ADVISOR).
Date: November 20, 2001
Creator: Kelly, K. J.; Mihalic, M. & Zolot, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Department of Energy's Pantex Plant Saves $10 Million in Energy Costs. Federal Energy Management Program (FEMP) ESPC Case Study Fact Sheet

Description: This two-page case study describes how the U.S. Department of Energy's Pantex Plant in Amarillo, Texas, will save approximately $10 million in energy costs over the next 18 years, thanks to a DOE Super Energy Savings Performance Contract (Super ESPC) delivery order for energy efficiency improvements. The delivery order is the largest to date for a DOE facility. Primarily, the delivery order calls for a new, state-of-the-art energy management control system and a new water/steam piping system, w… more
Date: November 20, 2001
Creator: Ward, C.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

Comparative analysis of alternative means for removing noncondensable gases from flashed-steam geothermal power plants

Description: This is a final report on a screening study to compare six methods of removing noncondensable gases from direct-use geothermal steam power plants. This report defines the study methodologies and compares the performance and economics of selected gas-removal systems. Recommendations are presented for follow-up investigations and implementation of some of the technologies discussed. The specific gas-removal methods include five vacuum system configurations using the conventional approach of evacu… more
Date: June 20, 2000
Creator: Vorum, M. & Fitzler, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

CAPTURING UNCERTAINTY IN UNSATURATED-ZONE FLOW USING DIFFERENT CONCEPTUAL MODELS OF FRACTURE-MATRIX INTERACTION

Description: Preliminary calculations show that the two different conceptual models of fracture-matrix interaction presented here yield different results pertinent to the performance of the potential repository at Yucca Mountain. Namely, each model produces different ranges of flow in the fractures, where radionuclide transport is thought to be most important. This method of using different flow models to capture both conceptual model and parameter uncertainty ensures that flow fields used in TSPA calculati… more
Date: February 20, 1998
Creator: SUSAN J. ALTMAN, MICHAEL L. WILSON, GUMUNDUR S. BODVARSSON
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Eliminating a Major Cause of Wire Drawing Breakage in A-15 High-Field Superconductors

Description: Eliminating a Major Cause of Wire Drawing Breakage in A-15 High-Field Superconductors Phase 1 Summary Purpose of the research: The Phase 1 goal was to make a significant improvement in the wire drawing technology used for difficult to draw superconductor precursor composites. Many ductile Nb-Al and Nb-Sn precursor wire composites have experienced the onset of wire drawing breakage at about 1.5 mm diameter. Phase 1 focused on evaluating the role that precision rigid guidance of the wire into the… more
Date: May 20, 2003
Creator: Austen, Alfred R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Building and measuring a high performance network architecture

Description: Once a year, the SC conferences present a unique opportunity to create and build one of the most complex and highest performance networks in the world. At SC2000, large-scale and complex local and wide area networking connections were demonstrated, including large-scale distributed applications running on different architectures. This project was designed to use the unique opportunity presented at SC2000 to create a testbed network environment and then use that network to demonstrate and evalua… more
Date: April 20, 2001
Creator: Kramer, William T.C.; Toole, Timothy; Fisher, Chuck; Dugan, Jon; Wheeler, David; Wing, William R et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Mountain-Scale Monitoring Network for Yucca Mountain PerformanceConfirmation

Description: Confirmation of the performance of Yucca Mountain is required by 10 CFR Part 63.131 to indicate, where practicable, that the natural system acts as a barrier, as intended. Hence, performance confirmation monitoring and testing would provide data for continued assessment during the pre-closure period. In general, to carry out testing at a relevant scale is always important, and in the case of performance confirmation, it is particularly important to be able to test at the scale of the repository… more
Date: January 20, 2006
Creator: Freifeld, Barry & Tsang, Yvonne
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Deployment Options for A Spent Fuel Treatment Facility in the United States

Description: A promising alternative to direct disposal is to process the commercial spent nuclear fuel into key partitions permitting recovery of some of the energy value while providing vital flexibility to the operation of a repository in a manner to minimize and possibly defer the near-term need for future repositories. It is assumed that such a Spent Fuel Treatment Facility (SFTF) will provide significant benefit to the US nuclear waste program and this paper focuses on key options for deployment of su… more
Date: November 20, 2003
Creator: Boore, W. Brent & McGuire, David H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Efficient Web Change Monitoring with Page Digest

Description: The Internet and the World Wide Web have enabled a publishing explosion of useful online information, which has produced the unfortunate side effect of information overload: it is increasingly difficult for individuals to keep abreast of fresh information. In this paper we describe an approach for building a system for efficiently monitoring changes to Web documents. This paper has three main contributions. First, we present a coherent framework that captures different characteristics of Web do… more
Date: February 20, 2004
Creator: Buttler, David J.; Rocco, Daniel & Liu, Ling
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

NIF: Path to Ignition in the Laboratory

Description: The National Ignition Facility (NIF) is a 192 beam laser facility presently under construction at LLNL. When completed NIF will be a 1.8 MJ, 500 TW ultraviolet laser system. Its missions are to obtain fusion ignition and to perform high energy density experiments in support of the US nuclear weapons stockpile. Four of the NIF beams have been commissioned to demonstrate laser performance and to commission the target area including target and beam alignment and laser timing. During this time, NIF… more
Date: January 20, 2006
Creator: Moses, E; Bonanno, G; Haynam, C; Kauffman, B; MacGowan, B; Sawicki, R et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Impact of Emerging MEMS-Based Microsystems on US Defense Applications

Description: This paper examines the impact of inserting Micro-Electro-Mechanical Systems (MEMS) into US defense applications. As specific examples, the impacts of micro Inertial Measurement Units (IMUs), radio frequency MEMS (RF MEMS), and Micro-Opto-Electro-Mechanical Systems (MOEMS) to provide integrated intelligence, communication, and control to the defense infrastructure with increased affordability, functionality, and performance are highlighted.
Date: January 20, 2000
Creator: Staple, Bevan D. & Jakubczak, Jerome F., II
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Enabling Strain Hardening Simulations with Dislocation Dynamics

Description: Numerical algorithms for discrete dislocation dynamics simulations are investigated for the purpose of enabling strain hardening simulations of single crystals on massively parallel computers. The algorithms investigated include the /(N) calculation of forces, the equations of motion, time integration, adaptive mesh refinement, the treatment of dislocation core reactions, and the dynamic distribution of work on parallel computers. A simulation integrating all of these algorithmic elements using… more
Date: December 20, 2006
Creator: Arsenlis, Athanasios; Cai, Wei; Tang, Meijie; Rhee, Moono; Oppelstrup, Tomas; Hommes, Gregg et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen