Search Results

open access

Afghanistan: Politics, Elections, and Government Performance

Description: This report discusses the current political state of Afghanistan, as well as the Afghan government. This report also discusses Afghanistan's relationship with the United States, particularly U.S. efforts to urge President Hamid Karzai, to address corruption within the Afghan government. The report also includes discussion of election fraud and corruption in Afghanistan.
Date: January 20, 2012
Creator: Katzman, Kenneth
Partner: UNT Libraries Government Documents Department
open access

Agriculture-Based Biofuels: Overview and Emerging Issues

Description: This report reviews the evolution of the U.S. biofuels sector and the role that federal policy has played in shaping its development. In addition, it highlights emerging issues that are critical to the biofuels sector and of relevance to Congress.
Date: January 20, 2012
Creator: Schnepf, Randy
Partner: UNT Libraries Government Documents Department
open access

ANALYSIS OF DWPF SLUDGE BATCH 6 (MACROBATCH 7) POUR STREAM GLASS SAMPLES

Description: The Defense Waste Processing Facility (DWPF) began processing Sludge Batch 6 (SB6), also referred to as Macrobatch 7 (MB7), in June 2010. SB6 is a blend of the heel of Tank 40 from Sludge Batch 5 (SB5), H-Canyon Np transfers and SB6 that was transferred to Tank 40 from Tank 51.1 SB6 was processed using Frit 418. Sludge is received into the DWPF Chemical Processing Cell (CPC) and is processed through the Sludge Receipt and Adjustment Tank (SRAT) and Slurry Mix Evaporator Tank (SME). The treated sludge slurry is then transferred to the Melter Feed Tank (MFT) and fed to the melter. During processing of each sludge batch, the DWPF is required to take at least one glass sample to meet the objectives of the Glass Product Control Program (GPCP) and to complete the necessary Production Records so that the final glass product may be disposed of at a Federal Repository. The DWPF requested various analyses of radioactive glass samples obtained from the melter pour stream during processing of SB6 as well as reduction/oxidation (REDOX) analysis of MFT samples to determine the impact of Argon bubbling. Sample analysis followed the Task Technical and Quality Assurance Plan (TTQAP) and an Analytical Study Plan (ASP). Four Pour Stream (PS) glass samples and two MFT slurry samples were delivered to the Savannah River National Laboratory (SRNL) from the DWPF. Table 1-1 lists the sample information for each pour stream glass sample. SB6 PS3 (S03472) was selected as the official pour stream sample for SB6 and full analysis was requested. This report details the visual observations of the as-received SB6 PS No.3 glass sample as well as results for the chemical composition, Product Consistency Test (PCT), radionuclide content, noble metals, and glass density. REDOX results will be provided for all four pour stream samples …
Date: January 20, 2012
Creator: Johnson, F.
Partner: UNT Libraries Government Documents Department
open access

ANALYSIS OF THE TANK 5F FINAL CHARATERIZATION SAMPLES-2011

Description: The Savannah River National Laboratory (SRNL) was requested by SRR to provide sample preparation and analysis of the Tank 5F final characterization samples to determine the residual tank inventory prior to grouting. Two types of samples were collected and delivered to SRNL: floor samples across the tank and subsurface samples from mounds near risers 1 and 5 of Tank 5F. These samples were taken from Tank 5F between January and March 2011. These samples from individual locations in the tank (nine floor samples and six mound Tank 5F samples) were each homogenized and combined in a given proportion into 3 distinct composite samples to mimic the average composition in the entire tank. These Tank 5F composite samples were analyzed for radiological, chemical and elemental components. Additional measurements performed on the Tank 5F composite samples include bulk density and water leaching of the solids to account for water soluble species. With analyses for certain challenging radionuclides as the exception, all composite Tank 5F samples were analyzed and reported in triplicate. The target detection limits for isotopes analyzed were based on customer desired detection limits as specified in the technical task request documents. SRNL developed new methodologies to meet these target detection limits and provide data for the extensive suite of components. While many of the target detection limits were met for the species characterized for Tank 5F, as specified in the technical task request, some were not met. In a few cases, the relatively high levels of radioactive species of the same element or a chemically similar element precluded the ability to measure some isotopes to low levels. The Technical Task Request allows that while the analyses of these isotopes is needed, meeting the detection limits for these isotopes is a lower priority than meeting detection limits for the other specified …
Date: January 20, 2012
Creator: Oji, L.; Diprete, D.; Coleman, C. & Hay, M.
Partner: UNT Libraries Government Documents Department

Cataloger Tasks: Work In Progress

Description: This presentation discusses cataloging tasks, including Functional Requirements for Bibliographic Records (FRBR), Functional Requirements for Authority Data (FRAD), Functional Requirements for Subject Authority Data (FRSAD), and concepts related to the tasks and decisions involved in cataloging.
Date: January 20, 2012
Creator: Miksa, Shawne D., 1969-
Partner: UNT College of Information
open access

The Debt Limit: History and Recent Increases

Description: This report discusses how the total debt of the federal government can increase, an historical overview of debt limits, and how the current economic slowdown has led to higher deficits and thereby a series of debt limit increases, as well as legislation related to these increases.
Date: January 20, 2012
Creator: Austin, D. Andrew & Levit, Mindy R.
Partner: UNT Libraries Government Documents Department
open access

Department of Justice: Working Capital Fund Adheres to Some Key Operating Principles but Could Better Measure Performance and Communicate with Customers

Description: A letter report issued by the Government Accountability Office with an abstract that begins "The Justice Management Division (JMD), the component responsible for managing the working capital fund, effectively tracks fund functions to ensure adherence to applicable fiscal laws and sound management practices. For example, JMD has well-established policies and procedures for tracking and monitoring the four working capital fund functions so that the fund adheres to authorized purposes. Further, JMD structures its reimbursable agreements with customers to facilitate adherence to the Economy Act—the statutory authority underlying most of JMD’s customer orders. JMD also clearly delineates roles and responsibilities, which allows customers to know who to contact with questions and clearly assigns responsibility for obligating and expending funds. Justice also ensures the fund’s self-sufficiency by recovering total costs for the provided services. These actions are consistent with two of the four key operating principles for working capital funds.Customers noted positive benefits from Justice’s shared services but seek more information on rate structures and want assurances that fund costs are equitably distributed. For example, customers said they valued the breadth of services offered as well as the experience of fund staff but wanted to better understand the basis for shared services rates and more opportunities to discuss billing concerns and service changes with JMD. Officials expressed surprise at these concerns. They noted that informal information sharing on rates and rate structures happens regularly, but explained that each staff director has his/her own way of communicating with customers and acknowledged that some may be better at providing customer support than others."
Date: January 20, 2012
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department
open access

Development and Applications Of Photosensitive Device Systems To Studies Of Biological And Organic Materials

Description: The primary focus of the grant is the development of new x-ray detectors for biological and materials work at synchrotron sources, especially Pixel Array Detectors (PADs), and the training of students via research applications to problems in biophysics and materials science using novel x-ray methods. This Final Progress Report provides a high-level overview of the most important accomplishments. These major areas of accomplishment include: (1) Development and application of x-ray Pixel Array Detectors; (2) Development and application of methods of high pressure x-ray crystallography as applied to proteins; (3) Studies on the synthesis and structure of novel mesophase materials derived from block co-polymers.
Date: January 20, 2012
Creator: Gruner, Sol
Partner: UNT Libraries Government Documents Department
open access

Effects of Radiation from Fukushima Dai-ichi on the U.S. Marine Environment

Description: The massive Tohoku earthquake and tsunami of March 11, 2011, caused extensive damage in northeastern Japan, including damage to the Fukushima Dai-ichi nuclear power installation, which resulted in the release of radiation. Concerns have arisen about the potential effects of this released radiation on the U.S. marine environment and resources. This report discusses these concerns.
Date: January 20, 2012
Creator: Buck, Eugene H. & Upton, Harold F.
Partner: UNT Libraries Government Documents Department
open access

MESH2D GRID GENERATOR DESIGN AND USE

Description: Mesh2d is a Fortran90 program designed to generate two-dimensional structured grids of the form [x(i),y(i,j)] where [x,y] are grid coordinates identified by indices (i,j). The x(i) coordinates alone can be used to specify a one-dimensional grid. Because the x-coordinates vary only with the i index, a two-dimensional grid is composed in part of straight vertical lines. However, the nominally horizontal y(i,j{sub 0}) coordinates along index i are permitted to undulate or otherwise vary. Mesh2d also assigns an integer material type to each grid cell, mtyp(i,j), in a user-specified manner. The complete grid is specified through three separate input files defining the x(i), y(i,j), and mtyp(i,j) variations. The overall mesh is constructed from grid zones that are typically then subdivided into a collection of smaller grid cells. The grid zones usually correspond to distinct materials or larger-scale geometric shapes. The structured grid zones are identified through uppercase indices (I,J). Subdivision of zonal regions into grid cells can be done uniformly, or nonuniformly using either a polynomial or geometric skewing algorithm. Grid cells may be concentrated backward, forward, or toward both ends. Figure 1 illustrates the above concepts in the context of a simple four zone grid.
Date: January 20, 2012
Creator: Flach, G. & Smith, F.
Partner: UNT Libraries Government Documents Department
open access

Numerical Homogenization on Approach for Stokesian Suspensions.

Description: In this technical report we investigate efficient methods for numerical simulation of active suspensions. The prototypical system is a suspension of swimming bacteria in a Newtonian fluid. Rheological and other macroscopic properties of such suspensions can differ dramatically from the same properties of the suspending fluid alone or of suspensions of similar but inactive particles. Elongated bacteria, such as E. coli or B. subtilis, swim along their principal axis, propelling themselves with the help of flagella, attached at the anterior of the organism and pushing it forward in the manner of a propeller. They interact hydrodynamically with the surrounding fluid and, because of their asymmetrical shape, have the propensity to align with the local flow. This, along with the dipolar nature of bacteria (the two forces a bacterium exerts on a fluid - one due to self-propulsion and the other opposing drag - have equal magnitude and point in opposite directions), causes nearby bacteria to tend to align, resulting in a intermittent local ordering on the mesoscopic scale, which is between the microscopic scale of an individual bacterium and the macroscopic scale of the suspension (e.g., its container). The local ordering is sometimes called a collective mode or collective swimming. Thanks to self-propulsion, collective modes inject momentum into the fluid in a coherent way. This enhances the local strain rate without changing the macroscopic stress applied at the boundary of the container. The macroscopic effective viscosity of the suspension is defined roughly as the ratio of the applied stress to the bulk strain rate. If local alignment and therefore local strain-rate enhancement, are significant, the effective viscosity can be appreciably lower than that of the corresponding passive suspension or even of the surrounding fluid alone. Indeed, a sevenfold decrease in the effective viscosity was observed in experiments with B. subtilis. …
Date: January 20, 2012
Creator: Haines, Brian M.; Berlyand, Leonid V. & Karpeev, Dmitry A.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen