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Carbon-Hydrogen Bond Activation by Titanium Imido Complexes. Computational Evidence for the Role of Alkane Adducts in Selective C-H Activation

Description: This article reports calculations that probe the role of R (hydrocarbon) and R' (ligand substituent) effects on the reaction coordinate for C-H activation.
Date: January 19, 2002
Creator: Cundari, Thomas R., 1964-; Klinckman, Thomas R. & Wolczanski, Peter T.
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
open access

SIMULTANEOUS MEASUREMENT OF CIRCULAR DICHROISM AND FLUORESCENCE POLARIZATION ANISOTROPY.

Description: Circular dichroism and fluorescence polarization anisotropy are important tools for characterizing biomolecular systems. Both are used extensively in kinetic experiments involving stopped- or continuous flow systems as well as titrations and steady-state spectroscopy. This paper presents the theory for determining circular dichroism and fluorescence polarization anisotropy simultaneously, thus insuring the two parameters are recorded under exactly the same conditions and at exactly the same tim… more
Date: January 19, 2002
Creator: SUTHERLAND,J.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Africa: U.S. Foreign Assistance Issues

Description: This report discusses the issue of U.S. economic assistance to sub-Saharan Africa, highlighting the importance of continued assistance in light of U.S. national security and also various U.S.-led efforts to promote reform amongst African citizens themselves. U.S. assistance finds its way to Africa through a variety of channels, including the USAID-administered DA program, food aid programs, and indirect aid provided through international financial institutions and the United Nations.
Date: February 19, 2002
Creator: Copson, Raymond W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application of Monte Carlo Methods in Molecular Targeted Radionuclide Therapy

Description: Targeted radionuclide therapy promises to expand the role of radiation beyond the treatment of localized tumors. This novel form of therapy targets metastatic cancers by combining radioactive isotopes with tumor-seeking molecules such as monoclonal antibodies and custom-designed synthetic agents. Ultimately, like conventional radiotherapy, the effectiveness of targeted radionuclide therapy is limited by the maximum dose that can be given to a critical, normal tissue, such as bone marrow, kidney… more
Date: February 19, 2002
Creator: Hartmann Siantar, C; Descalle, M-A; DeNardo, G L & Nigg, D W
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Carbon Monoxide Dehydrogenases and Acetyl-CoA Synthases: Light at the End of the Tunnel?

Description: OAK-B135 Metalloenzymes seem to ''come of age'' when their structures are known at atomic resolution, spectroscopic and catalytic properties are basically understood, and genetic expression systems are available. Such foundations allow detailed mechanistic and spectroscopic properties to be probed and correlated to structure. The objective of this article is to summarize what is known about the title group of enzymes, and show that, to a large degree, they have come of age.
Date: February 19, 2002
Creator: Lindahl, Paul A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Continuum simulation of dislocation dynamics: Predictions for internal friction response

Description: The amplitude dependent mechanical loss due to bosing of an idealized Frank-Read Source is studied using both simulation and analytical techniques. Dislocations are modeled within isotropic elasticity theory, and are assumed to be in the over-damped limit.
Date: February 19, 2002
Creator: Greaney, P. Alex; Friedman, Lawrence H. & Chrzan, D.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of Advanced Multi-Modality Radiation Treatment Planning Software

Description: The Idaho National Engineering and Environmental Laboratory (INEEL) has long been active in development of advanced Monte-Carlo based computational dosimetry and treatment planning methods and software for advanced radiotherapy, with a particular focus on Neutron Capture Therapy (NCT) and, to a somewhat lesser extent, Fast-Neutron Therapy. The most recent INEEL software product system of this type is known as SERA, Simulation Environment for Radiotherapy Applications. SERA is at a mature level … more
Date: February 19, 2002
Creator: Nigg, D W & Hartmann Siantar, C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effects of lattice disorder in the UCu(5-x)Pd(x) system

Description: The UCu5-x Pdx system exhibits non-Fermi liquid (NFL) behavior in thermodynamic and transport properties at low temperatures for Pd concentrations 0.9 less than or approximately x less than or approximately 1.5. The local structure around the U, Cu, and Pd atoms has been measured for
Date: February 19, 2002
Creator: Bauer, E. D.; Booth, C. H.; Kwei, G. H.; Chau, R. & Maple, M. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Electron proton two-stream instability at the PSR.

Description: A strong, fast, transverse instability has long been observed at the Los Alamos Proton Storage Ring (PSR) where it is a limiting factor on peak intensity. Most of the available evidence, based on measurements of the unstable proton beam motion, is consistent with an electron-proton two-stream instability. The need for higher beam intensity at PSR [1] and for future high-intensity, proton drivers has motivated a multi-lab collaboration (LANL, ANL, FNAL, LBNL, BNL, ORNL, and PPPL) to coordinate r… more
Date: February 19, 2002
Creator: Macek, R. J.; Browman, A.; Fitzgerald, D.; McCrady, R.; Merrill, F.; Plum, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Evaluation of Mass Transfer Performance for Caustic-Side Solvent Extraction of Cesium in a Conventional 5-cm Centrifugal Contactor

Description: Tests have been conducted to determine if satisfactory mass transfer performance is achieved using a fully pumping 5-cm centrifugal contactor under conditions present in the Caustic-Side Solvent Extraction (CSSX) process. Tests utilized a commercially available contactor that had been modified by installation of a rotor housing bottom that had straight radial vanes on the process side. As received from the vendor, the housing bottom was equipped with curved (impeller-type) vanes that were inten… more
Date: February 19, 2002
Creator: Birdwell, Jr. J.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fabrication and applications of large aperture diffractive optics

Description: Large aperture diffractive optics are needed in high power laser applications to protect against laser damage during operation and in space applications to increase the light gathering power and consequently the signal to noise. We describe the facilities we have built for fabricating meter scale diffractive optics and discuss several examples of these.
Date: February 19, 2002
Creator: Dixit, S; Britten, J B; Hyde, R; Rushford, M; Summers, L & Toeppen, J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

FASAB: Reclassification of Stewardship Responsibilities and Eliminating the Current Services Assessment: Statement of Federal Financial Accounting Standards (Exposure Draft)

Description: Other written product issued by the General Accounting Office with an abstract that begins "GAO provided information on the Federal Accounting Standards Advisory Board's statement of federal financial accounting standards (SFFAS). The statement presents proposed amendments to SFFAS No. 5 and No. 17."
Date: February 19, 2002
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Food Stamp Program: States' Use of Options and Waivers to Improve Program Administration and Promote Access

Description: A letter report issued by the General Accounting Office with an abstract that begins "To help states administer their Food Stamp Programs, the Food and Nutrition Service (FNS) offers options and waivers to their program rules and regulations. Almost all states used options or waivers in their food stamp eligibility determination process. More than half of the states chose to make households receiving Temporary Assistance for Needy Families (TANF) services automatically eligible for food stamps.… more
Date: February 19, 2002
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Geospatial Model for Remedial Design Optimization and Performance Evaluation

Description: Soil and ground water remediation projects require collection and interpretation of large amounts of spatial data. Two-dimensional (2D) mapping techniques are often inadequate for characterizing complex subsurface conditions at contaminated sites. To interpret data from these sites, we developed a methodology that allows integration of multiple, three-dimensional (3D) data sets for spatial analysis. This methodology was applied to the Department of Energy (DOE) Building 834 Operable Unit at Law… more
Date: February 19, 2002
Creator: Madrid, V M; Demir, Z; Gregory, S; Valett, J & Halden, R U
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Homeland Security: Coast Guard Operations--Background and Issues for Congress

Description: In response to the terrorist attacks of September 11, 2001, the Coast Guard significantly increased homeland-security operations to protect U.S. ports and waterways from potential maritime terrorist threats. The Coast Guard accomplished this in part by diverting resources from other missions. Increased requirements for homeland-security operations after September 11 appear to have added to a pre-existing tension between Coast Guard mission responsibilities and available resources. The Coast Gua… more
Date: February 19, 2002
Creator: O'Rourke, Ronald
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Homeland Security: Coast Guard Operations - Background and Issues for Congress

Description: This report discusses the Coast Guard's new homeland-security operations in the wake of the 9/11 attacks, which raise potential issues for Congress regarding the adequacy of Coast Guard assets and funding, the Coast Guard’s legal authorities, the Coast Guard’s location within the executive branch, and coordination between the Coast Guard and other agencies.
Date: February 19, 2002
Creator: O'Rourke, Ronald
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Homeland Security: Coast Guard Operations - Background and Issues for Congress

Description: This report discusses the Coast Guard's new homeland-security operations in the wake of the 9/11 attacks, which raise potential issues for Congress regarding the adequacy of Coast Guard assets and funding, the Coast Guard’s legal authorities, the Coast Guard’s location within the executive branch, and coordination between the Coast Guard and other agencies.
Date: February 19, 2002
Creator: O'Rourke, Ronald
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Homeland Security: Coast Guard Operations - Background and Issues for Congress

Description: This report discusses the Coast Guard's new homeland-security operations in the wake of the 9/11 attacks, which raise potential issues for Congress regarding the adequacy of Coast Guard assets and funding, the Coast Guard’s legal authorities, the Coast Guard’s location within the executive branch, and coordination between the Coast Guard and other agencies.
Date: February 19, 2002
Creator: O'Rourke, Ronald
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Information Technology: Enterprise Architecture Use Across the Federal Government Can Be Improved

Description: A letter report issued by the General Accounting Office with an abstract that begins "An enterprise architecture includes descriptive models to help decisionmakers understand how an entity operates today and in the future. Although 52 percent of federal departments and agencies report that they have satisfied at least those management practices for developing, completing, and leveraging architectures, only four percent report that they have satisfied the management practices necessary for an ef… more
Date: February 19, 2002
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measurement of Gas and Liquid Velocities in an Air-Water Two-Phase Flow using Cross-Correlation of Signals from a Double Senor Hot-Film Probe

Description: Local gas and liquid velocities are measured by cross-correlating signals from a double sensor hot-film anemometer probe in pure water flow and air water two-phase flow. The gas phase velocity measured in two-phase flow agrees with velocity data obtained using high-speed video to within +/-5%. A turbulent structure, present in the liquid phase, allows a correlation to be taken, which is consistent with the expected velocity profiles in pure liquid flow. This turbulent structure is also present … more
Date: February 19, 2002
Creator: Gurau, B.; Vassalo, P. & Keller, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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