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2-pi Photoproduction from CLAS and CB-ELSA - The Search for Missing Resonances

Description: 2-pi-photoproduction is one of the promising reactions to search for baryon resonances that have been predicted but have not yet been observed. The gamma-rho --> rho-pi{sup 0}-pi{sup 0}(CB-ELSA) and the gamma-rho --> rho-pi{sup +}-pi{sup -} (CLAS) data show interesting resonance structures. A partial wave analysis (PWA) has to be done to determine which baryon resonances contribute what their quantum numbers and their relative couplings to the different accessible rho-2-pi-channels and to… more
Date: October 1, 2003
Creator: Thoma, Ulrike
Item Type: Refine your search to only Article
captions transcript

9-11 Commission Hearing #4, October 14, 2003, Part 1

Description: Recording of the fourth public hearing held by the National Commission on Terrorist Attacks upon the United States on October 14, 2003 at the Russell Senate Office Building in Washington, D.C. The Commission heard testimony from two sets of witnesses on leadership of U.S. intelligence, intelligence and national security policy, and the effectiveness of warning against transnational threats. This section includes the opening statement from Chairman Kean, and the panels on leadership of U.S. inte… more
Date: October 14, 2003
Duration: 4 hours 45 minutes
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
captions transcript

9-11 Commission Hearing #4,October 14, 2003, Part 2

Description: Recording of the fourth public hearing held by the National Commission on Terrorist Attacks upon the United States on October 14, 2003 at the Russell Senate Office Building in Washington, D.C. The Commission heard testimony from two sets of witnesses on leadership of U.S. intelligence, intelligence and national security policy, and the effectiveness of warning against transnational threats This section includes the third panel on warning of transnational threats, with testimony from Richard Ker… more
Date: October 14, 2003
Duration: 1 hour 33 minutes 25 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
open access

24-Channel Geophone Array for Horizontal or Vertical Boreholes: Final Report

Description: Improved ground-imaging capabilities have enormous potential to increase energy, environmental, and economic benefits by improving exploration accuracy and reducing energy consumption during the mining cycle. Seismic tomography has been used successfully to monitor and evaluate geologic conditions ahead of a mining face. A primary limitation to existing seismic tomography, however, is the placement of sensors. The goal of this project is to develop an array of 24 seismic sensors capable of bein… more
Date: October 24, 2003
Creator: Westman, Erik C.
Item Type: Refine your search to only Report
open access

2001 - 2002 Upper Three Runs Sequence of Earthquakes at the SRS, South Carolina

Description: On October 08, 2001 a small felt earthquake occurred near Upper Three Runs Creek in the north central area of the Savannah River Site, South Carolina. Seven very small aftershocks followed the main event with the last one occurring March 06, 2002. All activity occurred within a small area. Further analysis of collected data indicates a correlation of this low level seismic activity with a small northwest trending structure observed in detailed gravity and magnetic data. Both single event and co… more
Date: October 16, 2003
Creator: Stevenson, Donald A.
Item Type: Refine your search to only Article
open access

2002 SITE ENVIRONMENTAL REPORT.

Description: The 2002 Site Environmental Report (SER) is prepared in accordance with DOE Order 231.1, ''Environment, Safety and Health Reporting'', and summarizes the status of Brookhaven National Laboratory's (BNL) environmental programs and performance and restoration efforts, as well as any impacts, both past and present, that Laboratory operations have had on the environment. The document is intended to be technical in nature. A summary of the report is also prepared as a separate document to provide a … more
Date: October 1, 2003
Creator: LABORATORY, BROOKHAVEN NATIONAL
Item Type: Refine your search to only Report
open access

3D Adaptive Mesh Refinement Simulations of Pellet Injection in Tokamaks

Description: We present results of Adaptive Mesh Refinement (AMR) simulations of the pellet injection process, a proven method of refueling tokamaks. AMR is a computationally efficient way to provide the resolution required to simulate realistic pellet sizes relative to device dimensions. The mathematical model comprises of single-fluid MHD equations with source terms in the continuity equation along with a pellet ablation rate model. The numerical method developed is an explicit unsplit upwinding treatment… more
Date: October 20, 2003
Creator: Samtaney, R.; Jardin, S. C.; Colella, P. & Martin, D. F.
Item Type: Refine your search to only Report
open access

Ab initio calculations in a uniform magnetic field using periodic supercells

Description: We present a formulation of ab initio electronic structure calculations in a finite magnetic field, which retains the simplicity and efficiency of techniques widely used in first principles molecular dynamics simulations, based on plane-wave basis sets and Fourier transforms. In addition we discuss results obtained with this method for the energy spectrum of interacting electrons in quantum wells, and for the electronic properties of dense fluid deuterium in a uniform magnetic field.
Date: October 21, 2003
Creator: Cai, W & Galli, G
Item Type: Refine your search to only Article
open access

Ab initio shell model with a chiral-symmetry-based three-nucleon force for the p-shell nuclei

Description: The ab initio no-core shell model (NCSM) is extended to include a realistic three-body interaction in calculations for p-shell nuclei. They present results of first applications using the Argonne V8' nucleon-nucleon (NN) potential and the Tucson-Melbourne TM'(99) three-nucleon interaction (TNI). In addition to increase of binding energy, they observe a trend toward level-ordering and level-spacing improvement in comparison to experiment. With the TNI they obtain a correct ground-state spin for … more
Date: October 14, 2003
Creator: Navratil, P; Hayes, A C; Vary, J P & Ormand, W E
Item Type: Refine your search to only Report
open access

Abortion: Legislative Response

Description: The primary focus of this issue brief is legislative action in the 108th Congress with respect to abortion. However, discussion of those legislative proposals necessarily involves a brief discussion of the leading U.S. Supreme Court decisions concerning a woman’s right to choose whether to terminate her pregnancy. For a more detailed discussion of the relevant case law, see CRS Report 95-724, Abortion Law Development: A Brief Overview.
Date: October 1, 2003
Creator: Lewis, Karen J.; Shimabukuro, Jon O. & Ely, Dana
Item Type: Refine your search to only Report
open access

Abortion: Legislative Response

Description: The primary focus of this issue brief is legislative action in the 108th Congress with respect to abortion. However, discussion of those legislative proposals necessarily involves a brief discussion of the leading U.S. Supreme Court decisions concerning a woman’s right to choose whether to terminate her pregnancy. For a more detailed discussion of the relevant case law, see CRS Report 95-724, Abortion Law Development: A Brief Overview.
Date: October 3, 2003
Creator: Lewis, Karen J.; Shimabukuro, Jon O. & Ely, Dana
Item Type: Refine your search to only Report
open access

Above- and belowground competition from longleaf pine plantations limits performance of reintroduced herbaceous species.

Description: Although overstory trees limit the abundance and species richness of herbaceous vegetation in longleaf pine (Pinus palustris Mill.) plantations, the responsible mechanisms are poorly understood because of confounding among limiting factors. In fall 1998, research was initiated to determine the separate effects of above- and belowground competition and needlefall from overstory pines on understory plant performance. Three 13- to 15-yr-old plantations near Aiken, SC, were thinned to 0, 25, 50, or… more
Date: October 1, 2003
Creator: Harrington, T. B.; Dagley, C. M. & Edwards., M. B.
Item Type: Refine your search to only Article
open access

Acoustic Tests of Small Wind Turbines: Preprint

Description: Eight small wind turbines ranging from 400 watts to 100 kW in rated power were tested for acoustic emissions at the U.S. Department of Energy's National Renewable Energy Laboratory. Rigorous test procedures based on international standards were followed for measurements and data analyses. Results are presented in the form of sound pressure level versus wind speed, where the sound was recorded downwind of the turbine at a distance equal to the hub height plus half the rotor diameter. When there … more
Date: October 1, 2003
Creator: Migliore, P.; van Dam, J. & Huskey, A.
Item Type: Refine your search to only Article
open access

Activation Cross Sections Improvements needed for IFE Power Reactors Designs

Description: Uncertainties in the prediction of the neutron induced long-lived activity in the natural elements from H to Bi due to activation cross section uncertainties are estimated assuming as neutron environment those of the HYLIFE-II and Sombrero vessel structures. The latest available activation cross section data are employed. The random variables used in the uncertainty analysis have been the concentration limits (CL's) corresponding to hands-on recycling, remote recycling and shallow land burial, … more
Date: October 2, 2003
Creator: Rodriguez, A; Cabellos, O; Sanz, J; FalQuina, R; Latkowski, J & Reyes, S
Item Type: Refine your search to only Article
open access

Active Cathodes for Super-High Power Density Solid Oxide Fuel Cells Through Space Charge Effects

Description: This report summarizes the work done during the second quarter of the project. Effort is directed in two areas: (1) The use of a novel method to achieve a given porosity level with high contiguity and thus conductivity. (2) Relate the measured conductivity to porosity and contiguity. The rationale for these experiments was to develop cathodes with high ionic conductivity, so that the effective polarization resistance will be concomitantly lowered.
Date: October 11, 2003
Creator: Virkar, Anil V.
Item Type: Refine your search to only Report
open access

Active Filter Hardware Design & Performance for the DIII-D Plasma Control System

Description: OAK-B135 The digital plasma control system (PCS), currently in operation on the DIII-D tokamak, requires inputs from a large number of sensors. Due to the nature of the digitizers and the relative noisy environment from which these signals are derived, each of the 32 signals must be conditioned via an active filter. Two different types of filters, Chebyshev and Bessel with fixed frequencies: 100 Hz Bessel was used for filtering the motional Stark effect diagnostic data. 800 Hz Bessel was design… more
Date: October 1, 2003
Creator: Sellers, D.; Ferron, J. R.; Walker, M. L. & Broesch, J. D.
Item Type: Refine your search to only Article
open access

Adapting SAM for CDF

Description: The CDF and D0 experiments probe the high-energy frontier and as they do so have accumulated hundreds of Terabytes of data on the way to petabytes of data over the next two years. The experiments have made a commitment to use the developing Grid based on the SAM system to handle these data. The D0 SAM has been extended for use in CDF as common patterns of design emerged to meet the similar requirements of these experiments. The process by which the merger was achieved is explained with particul… more
Date: October 13, 2003
Creator: Bonham, D.; Garzoglio, G.; Herber, R.; Kowalkowski, J.; Litvintsev, D.; Lueking, L. et al.
Item Type: Refine your search to only Article
open access

Adaptive Full-Spectrum Solar Energy Systems Cross-Cutting R&D on Adaptive Full Spectrum Solar Energy Systems for More Efficient and Affordable Use of Solar Energy in Buildings and Hybrid Photobioreactors

Description: This RD&D project is a three year team effort to develop a hybrid solar lighting (HSL) system that transports day light from a paraboloidal dish concentrator to a luminaire via a large core polymer fiber optic. The luminaire can be a device to distribute sunlight into a space for the production of algae or it can be a device that is a combination of day lighting and fluorescent lighting for office lighting. In this project, the sunlight is collected using a one-meter paraboloidal concentrat… more
Date: October 1, 2003
Creator: Wood, Byard D. & Muhs, Jeff D.
Item Type: Refine your search to only Report
open access

Adaptive low mach number simulations of a premixed turbulent laboratory burner

Description: A parallel adaptive low Mach number model is used to study an experimental lean premixed turbulent methane V-flame that is stabilized on a rod spanning the exit plane of a circular nozzle. The fuel is turbulent due to an upstream perforated-plate, and the resulting flame extends downstream of the rod. We present three-dimensional time-dependent simulations of this configuration. The computations incorporate detailed reaction chemistry and transport using a dynamically adaptive block-structured … more
Date: October 20, 2003
Creator: Day, M.S.; Bell, J.B.; Lijewski, M.J.; Johnson, M.; Cheng, R.K. & Shepherd, I.G.
Item Type: Refine your search to only Article
open access

Adaptive network countermeasures.

Description: This report describes the results of a two-year LDRD funded by the Differentiating Technologies investment area. The project investigated the use of countermeasures in protecting computer networks as well as how current countermeasures could be changed in order to adapt with both evolving networks and evolving attackers. The work involved collaboration between Sandia employees and students in the Sandia - California Center for Cyber Defenders (CCD) program. We include an explanation of the need… more
Date: October 1, 2003
Creator: McClelland-Bane, Randy; Van Randwyk, Jamie A.; Carathimas, Anthony G. & Thomas, Eric D.
Item Type: Refine your search to only Report
open access

The adequacy of current import and export controls on sealed radioactive sources.

Description: Millions of sealed radioactive sources (SRSs) are being used for a wide variety of beneficial purposes throughout the world. Security experts are now concerned that these beneficial SRSs could be used in a radiological dispersion device to terrorize and disrupt society. The greatest safety and security threat is from those highly radioactive Category 1 and 2 SRSs. Without adequate controls, it may be relatively easy to legally purchase a Category 1 or 2 SRS on the international market under fal… more
Date: October 1, 2003
Creator: Longley, Susan W.; Cochran, John Russell; Price, Laura L. (Beta Corporation, Glendale, AZ) & Lipinski, Kendra J.
Item Type: Refine your search to only Report
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