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994
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424
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DOSAR/CalLab Operations Manual
The Life Sciences Division (LSD) of Oak Ridge National Laboratory (ORNL) has a long record of radiation dosimetry research, primarily using the Health Physics Research Reactor (HPRR) and the Dosimetry Applications Research (DOSAR) Program Calibration Laboratory (CalLab), referred to formerly as the Radiation Calibration Laboratory. These facilities have been used by a broad segment of the research community to perform a variety of experiments in areas including, but not limited to, radiobiology, radiation dosimeter and instrumentation development and calibration, and the testing of materials in a variety of radiation environments.
Date:
March 1, 2000
Creator:
Bogard, J.S.
Object Type:
Report
System:
The UNT Digital Library
The East Tennessee Technology Park Progress Report for the Tennessee Hazardous Waste Reduction Act for Calendar Year 1999
This report is prepared for the East Tennessee Technology Park (formerly the Oak Ridge K-25 Site) (ETTP) in compliance with the ''Tennessee Hazardous Waste Reduction Act of 1990'' (THWRA) (TDEC 1990), Tennessee Code Annotated 68-212-306. Annually, THWRA requires a review of the site waste reduction plan, completion of summary waste reduction information as part of the site's annual hazardous waste reporting, and completion of an annual progress report analyzing and quantifying progress toward THWRA-required waste stream-specific reduction goals. This THWRA-required progress report provides information about ETTP's hazardous waste streams regulated under THWRA and waste reduction progress made in calendar year (CY) 1999. This progress report also documents the annual review of the site plan, ''Oak Ridge Operations Environmental Management and Enrichment Facilities (EMEF) Pollution Prevention Program Plan'', BJC/OR-306/R1 (Bechtel Jacobs Company 199a). In 1996, ETTP established new goal year ratios that extended the goal year to CY 1999 and targeted 50 percent waste stream-specific reduction goals. In CY 1999, these CY 1999 goals were extended to CY 2000 for all waste streams that generated waste in 1999. Of the 70 ETTP RCRA waste streams tracked in this report from base years as early as CY 1991, 51 waste streams met …
Date:
March 1, 2000
Creator:
LLC, Bechtel Jacobs Company
Object Type:
Report
System:
The UNT Digital Library
Effect of W coating on microengine performance
Two major problems associated with Si-based MEMS (MicroElectroMechanical Systems) devices are stiction and wear. Surface modifications are needed to reduce both adhesion and friction in micromechanical structures to solve these problems. In this paper, the authors present a CVD (Chemical Vapor Deposition) process that selectively coats MEMS devices with tungsten and significantly enhances device durability. Tungsten CVD is used in the integrated-circuit industry, which makes this approach manufacturable. This selective deposition process results in a very conformal coating and can potentially address both stiction and wear problems confronting MEMS processing. The selective deposition of tungsten is accomplished through the silicon reduction of WF{sub 6}. The self-limiting nature of the process ensures consistent process control. The tungsten is deposited after the removal of the sacrificial oxides to minimize stress and process integration problems. The tungsten coating adheres well and is hard and conducting, which enhances performance for numerous devices. Furthermore, since the deposited tungsten infiltrates under adhered silicon parts and the volume of W deposited is less than the amount of Si consumed, it appears to be possible to release adhered parts that are contacted over small areas such as dimples. The wear resistance of tungsten coated parts has been shown …
Date:
March 1, 2000
Creator:
Mani, Seethambal S.; Fleming, James G.; Walraven, Jeremy A.; Sniegowski, Jeffry J.; De Boer, Maarten P.; Irwin, Lloyd W. et al.
Object Type:
Article
System:
The UNT Digital Library
Effects of air infiltration on the effective thermal conductivity of internal fiberglass insulation and on the delivery of thermal capacity via ducts
None
Date:
March 1, 2000
Creator:
Levinson, Ronnen; Woody, Delp Wm.; Dickerhoff, Darryl & Modera, Mark
Object Type:
Report
System:
The UNT Digital Library
Effects of Fishing Activities on Benthic Habitat Proposed Research Plan for the Alaska Region
This report summarizes a research plan which focuses on the effects of fishing activities on benthic habitats in Alaska.
Date:
March 2000
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Electrokinetic pumps and actuators
Flow and ionic transport in porous media are central to electrokinetic pumping as well as to a host of other microfluidic devices. Electrokinetic pumping provides the ability to create high pressures (to over 10,000 psi) and high flow rates (over 1 mL/min) with a device having no moving parts and all liquid seals. The electrokinetic pump (EKP) is ideally suited for applications ranging from a high pressure integrated pump for chip-scale HPLC to a high flow rate integrated pump for forced liquid convection cooling of high-power electronics. Relations for flow rate and current fluxes in porous media are derived that provide a basis for analysis of complex microfluidic systems as well as for optimization of electrokinetic pumps.
Date:
March 1, 2000
Creator:
Paul, Phillip M.
Object Type:
Report
System:
The UNT Digital Library
Energetic Proton Generation in Ultra-Intense Laser-Solid Interactions
An explanation for the energetic ions observed in the PetaWatt experiments is presented. In solid target experiments with focused intensities exceeding 10{sup 20} W/cm{sup 2}, high-energy electron generation, hard bremsstrahlung, and energetic protons have been observed on the backside of the target. In this report, we attempt to explain the physical process present that will explain the presence of these energetic protons, as well as explain the number, energy, and angular spread of the protons observed in experiment. In particular, we hypothesize that hot electrons produced on the front of the target are sent through to the back off the target, where they ionize the hydrogen layer there. These ions are then accelerated by the hot electron cloud, to tens of MeV energies in distances of order tens of microns, whereupon they end up being detected in the radiographic and spectrographic detectors.
Date:
March 1, 2000
Creator:
Wilks, S. C.; Langdon, A. B.; Cowan, T. E.; Roth, M.; Singh, M.; Hatchett, S. et al.
Object Type:
Report
System:
The UNT Digital Library
Energy Savings Calculations for Heat Island Reduction Strategies in Baton Rouge, Sacramento and Salt Lake City
In 1997, the US Environmental Protection Agency (EPA) established the ''Heat Island Reduction Initiative'', to quantify the potential benefits of Heat Island Reduction (HIR) strategies (i.e., shade trees, reflective roofs, reflective pavements and urban vegetation) to reduce cooling energy use in buildings, lower the ambient air temperature and improve urban air quality in cities, and reduce CO2 emissions from power plants. Under this initiative, the Urban Heat Island Pilot Project (UHIPP) was created with the objective to investigate the potential of HIR strategies in residential and commercial buildings in three initial UHIPP cities: Baton Rouge, Sacramento and Salt Lake City. This paper summarizes our efforts to calculate the annual energy savings, peak power avoidance and annual C02 reduction of HIR strategies in the three initial cities. In this analysis, we focused on three building types that offer most savings potential: single-family residence, office and retail store. Each building type was characterized in detail by old or new construction and with a gas furnace or an electric heat pump. We defined prototypical building characteristics for each building type and simulated the impact of HIR strategies on building cooling and heating energy use and peak power demand using the DOE-2.IE model. Our …
Date:
March 1, 2000
Creator:
Konopacki, S. & Akbari, H.
Object Type:
Report
System:
The UNT Digital Library
Engineering a new material for hot gas cleanup
The engineering development of a promising sorbent for desulfurizing hot coal gas was initiated and preliminary results are presented. The sorbent is calcium-based and is designed to be regenerated and reused repeatedly. It is prepared by pelletizing powdered limestone in a rotating drum pelletizer followed by the application of a coating which becomes a strong, porous shell upon further treatment. The resulting spherical pellets combine the high reactivity of lime with the strength of an inert protective shell. Preliminary work indicates that a satisfactory shell material is comprised of a mixture of ultrafine alumina powder, somewhat coarser alumina particles, and pulverized limestone which upon heating to 1,373 K (1,100 C) becomes a coherent solid through the mechanism of particle sintering. Several batches of core-in-shell pellets were prepared and tested with encouraging results.
Date:
March 1, 2000
Creator:
Wheelock, T. D.; Doraiswamy, L. K. & Constant, K.
Object Type:
Report
System:
The UNT Digital Library
Environmental Assessment and Finding of No Significant Impact: The Nevada Test Site Development Corporations's Desert Rock Sky Park at the Nevada Test Site
The United States Department of Energy has prepared an Environmental Assessment (DOE/EA-1300) (EA) which analyzes the potential environmental effects of developing operating and maintaining a commercial/industrial park in Area 22 of the Nevada Test Site, between Mercury Camp and U.S. Highway 95 and east of Desert Rock Airport. The EA evaluates the potential impacts of infrastructure improvements necessary to support fill build out of the 512-acre Desert Rock Sky Park. Two alternative actions were evaluated: (1) Develop, operate and maintain a commercial/industrial park in Area 22 of the Nevada Test Site, and (2) taking no action. The purpose and need for the commercial industrial park are addressed in Section 1.0 of the EA. A detailed description of the proposed action and alternatives is in section 2.0. Section 3.0 describes the affected environment. Section 4.0 the environmental consequences of the proposed action and alternative. Cumulative effects are addressed in Section 5.0. Mitigation measures are addressed in Section 6.0. The Department of Energy determined that the proposed action of developing, operating and maintaining a commercial/industrial park in Area 22 of the Nevada Test Site would best meet the needs of the agency.
Date:
March 1, 2000
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Euro: Implications for the United States--Answers to Key Questions
Other written product issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on the euro, focusing on: (1) what the euro is and why Europe is moving to it now; (2) what the potential effects of the euro are on the dollar; (3) what are the potential monetary policy and exchange rate effects of the euro; (4) what are the euro's implications for U.S. trade and investment with Europe; and (5) what are the implications of the euro for international economic policymaking. GAO noted that: (1) the euro is the new currency being used by 11 of the 15 countries that are members of the European Union (EU); (2) the euro is part of an initiative known as the European Economic and Monetary Union and is designed to more closely link EU's economic policies; (3) a variety of factors will determine whether the emergence of the euro will have a significant impact on the international role of the dollar; (4) over the longer term, several analysts believe that the comparative status of the dollar and euro as international currencies may be affected by potential developments in the euro area payments …
Date:
March 1, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
An Evaluation of Several Hardening Models Using Taylor Cylinder Impact Data
None
Date:
March 1, 2000
Creator:
Zocher, M. A. & Maudlin, P. J.
Object Type:
Article
System:
The UNT Digital Library
Executive Guide: Maximizing the Success of Chief Information Officers (Exposure Draft) (Superseded by GAO-01-376G)
Guidance issued by the General Accounting Office with an abstract that begins "This publication has been superseded by GAO-01-376G, Executive Guide: Maximizing the Success of Chief Information Officers: Learning From Leading Organizations, February 2001. GAO published a guide: (1) to assist federal agencies in maximizing the success of chief information officers (CIO); and (2) to offer concrete suggestions on what agency executives can do to ensure the effectiveness of their CIO organizations."
Date:
March 1, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Experimental Determination of Contaminant Metal Mobility as a Function of Temperature, Time and Solution Chemistry
During the FY96-FY99 funding cycle we examined the uptake of aqueous strontium onto goethite, kaolinite, and amorphous silica surfaces as a function of pH, total strontium, and temperature. Our overall goal was to produce a mechanistic sorption model that can be used in reaction-transport calculations to predict the mobility and attenuation of radioactive strontium ({sup 90}Sr)in the environment. Our approach was to combine structural information derived from EXAFS analysis together with macroscopic uptake data and surface complexation models to clarify the physical and chemical structure of sorbed complexes. We chose to study these solids because of the prevalence of clays and iron hydroxides in natural systems, and because silica colloids probably form beneath leaking tanks at Hanford as caustic waste is neutralized. We have published the spectroscopic work in two papers in the Journal of Colloid and Interface Science [1, 2], and will soon submit at third manuscript to Geochemical Transactions [3] combining the sorption and spectroscopic data with a mechanistic complexation model. Early in the study we learned that strontium sorption was independent of temperature (25 to 80 C). All subsequent work was conducted at room temperature.
Date:
March 1, 2000
Creator:
Carroll, S A & O'Day, P A
Object Type:
Article
System:
The UNT Digital Library
Extension and Enhancement Methods for Setting Data Quality Objectives
The project developed statistical tools for the application of decision theory and operations research methods, including cost-benefit analysis, to the DQO process for environmental clean up. A pilot study was conducted, using these methods at the Hanford site, to estimate vadose zone contamination plumes under the SX tank farm, and to help plan further sampling.
Date:
March 1, 2000
Creator:
Goodman, D.
Object Type:
Report
System:
The UNT Digital Library
FCC Record, Volume 15, No. 7, Pages 4219 to 4857, February 22 - March 3, 2000
Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date:
March 2000
Creator:
United States. Federal Communications Commission.
Object Type:
Book
System:
The UNT Digital Library
FCC Record, Volume 15, No. 8, Pages 4858 to 5504, March 6 - March 17, 2000
Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date:
March 2000
Creator:
United States. Federal Communications Commission.
Object Type:
Book
System:
The UNT Digital Library
FCC Record, Volume 15, No. 9, Pages 5505 to 6052, March 20 - March 31, 2000
Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date:
March 2000
Creator:
United States. Federal Communications Commission.
Object Type:
Book
System:
The UNT Digital Library
February 2000 Follow-Up on Rider 5: Texas Southern University Accountability Systems
Report of the Texas State Auditor's Office related to the results of the Texas Southern University's implementation and maintenance of systems and controls over finance and accounting, human resources, management information systems, planning and communications, and student financial aid.
Date:
March 2000
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
The FET1 Level 1 Method: Theory and Implementation
This report summarizes our experiences in developing a prototype serial code for the implementation of the Level 1 Finite Element Tearing and Interconnecting (FETI) method. This method is a non-overlapping domain-decomposition scheme for the parallel solution of ill-conditioned systems of linear equations arising in structural mechanics problems. The FETI method has been shown to be numerically scalable for second order elasticity and fourth order plate and shell problems. In this report, we first outline the theory underlying the FETI method and discuss the approaches taken to improve the robustness and convergence of the method. We next provide implementation details, focusing on our serial prototype code. Finally, we present experimental results, followed by a summary of our observations.
Date:
March 1, 2000
Creator:
Kamath, C.
Object Type:
Report
System:
The UNT Digital Library
Field dependent dopant deactivation in bipolar devices at elevated irradiation temperatures
Dopant deactivation at 100 C is measured in bipolar Si-SiO{sub 2} structures as a function of irradiation bias. The deactivation occurs most efficiently at small biases in depletion and is consistent with passivation and compensation mechanisms involving hydrogen.
Date:
March 1, 2000
Creator:
WITCZAK,STEVEN C.; SCHWANK,JAMES R.; SHANEYFELT,MARTY R. & LACOE,R.C.
Object Type:
Article
System:
The UNT Digital Library
Final Report: Field Reversed Configurations - Critical Issue Scoping: Reactor Plasma Physics, September 1, 1997 - August 31, 1999
None
Date:
March 1, 2000
Creator:
Steinhauer, Loren
Object Type:
Report
System:
The UNT Digital Library
Financial Audit: American Battle Monuments Commission's Financial Statements for Fiscal Years 1999 and 1998
A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a legislative requirement, GAO conducted an audit of the agencywide financial statements of the American Battle Monuments Commission (ABMC) for fiscal years 1999 and 1998."
Date:
March 1, 2000
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Financial Audit: Bureau of the Public Debt's Fiscal Years 1999 and 1998 Schedules of Federal Debt
A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a legislative requirement, GAO audited the Bureau of the Public Debt's (BPD) Schedules of Federal Debt for the fiscal years that ended September 30, 1999 and 1998."
Date:
March 1, 2000
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library