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2010 Census: Data Collection Operations Were Generally Completed as Planned, but Long-standing Challenges Suggest Need for Fundamental Reforms
A letter report issued by the Government Accountability Office with an abstract that begins "Although the U.S. Census Bureau (Bureau) generally completed the field data collection phase of the 2010 Census consistent with its operational plans, at $13 billion, 2010 was the costliest census in the nation's history. Moving forward, it will be important to both refine existing operations as well as to reexamine the fundamental approach to the census to better address long-standing issues such as securing participation and escalating costs. As requested, this report reviews (1) the conduct of nonresponse follow-up (NRFU), where enumerators collect data from households that did not return their census forms, (2) the implementation of other field operations critical to a complete count, and (3) potential reexamination areas that could help produce a more cost-effective 2020 Census. The report is based on GAO's analysis of Bureau data and documents, surveys of local census office managers, and field observations."
Date:
December 14, 2010
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
2010 Census: Follow-up Should Reduce Coverage Errors, but Effects on Demographic Groups Need to Be Determined
A letter report issued by the Government Accountability Office with an abstract that begins "The U.S. Census Bureau (Bureau) puts forth tremendous effort to conduct a complete and accurate count of the nation's population and housing; yet some degree of error in the form of persons missed, duplicated, or counted in the wrong place is inevitable due to the complexity in counting a large and diverse population. The Bureau designed two operations, Coverage Follow-up (CFU) and Field Verification (FV), to reduce certain types of counting, or coverage, errors in the 2010 Census. GAO was asked to assess (1) the extent to which the Bureau completed CFU and FV on schedule and within estimated cost and (2) the implications of their key design elements for improving coverage. GAO reviewed Bureau evaluations, planning, and other documents on CFU and FV, and prior GAO work, and interviewed Bureau officials."
Date:
December 14, 2010
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
2010 Census: Key Efforts to Include Hard-to-Count Populations Went Generally as Planned; Improvements Could Make the Efforts More Effective for Next Census
A letter report issued by the Government Accountability Office with an abstract that begins "To overcome the long-standing challenge of enumerating hard-to-count (HTC) groups such as minorities and renters, the U.S. Census Bureau (Bureau), used outreach programs, such as paid advertising, and partnered with thousands of organizations to enlist their support for the census. The Bureau also conducted Service-Based Enumeration (SBE), which was designed to count people who frequent soup kitchens or other service providers, and the Be Counted/Questionnaire Assistance Center (QAC) program, designed to count individuals who believed the census had missed them. As requested, GAO assessed how the design of these efforts compared to 2000 and the extent to which they were implemented as planned. GAO reviewed Bureau budget, planning, operational, and evaluation documents; observed enumeration efforts in 12 HTC areas; surveyed local census office managers; and interviewed Bureau officials."
Date:
December 14, 2010
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Defense Acquisitions: Realizing Savings under Different Littoral Combat Ship Acquisition Strategies Depends on Successful Management of Risks
Testimony issued by the Government Accountability Office with an abstract that begins "This testimony discusses the Department of the Navy's proposed dual ship acquisition strategy for the Littoral Combat Ship (LCS) program. LCS is envisioned as a vessel able to be reconfigured to meet three different mission areas: mine countermeasures, surface warfare, and antisubmarine warfare. Its design concept consists of two distinct parts--the ship itself (seaframe) and the mission package it carries and deploys. The Navy is procuring the first four ships in two different designs from shipbuilding teams led by Lockheed Martin and General Dynamics, which currently build their designs at Marinette Marine and Austal USA shipyards, respectively. The Navy's strategy for procuring LCS has evolved over the years. Prior to September 2009, the Navy planned to continue building the class using both ship designs. This strategy changed following unsuccessful contract negotiations that same year for fiscal year 2010 funded seaframes--an outcome attributable to industry proposals priced significantly above Navy expectations. In September 2009, the Navy announced that in an effort to improve affordability, it was revising the LCS program's acquisition strategy and would select one seaframe design before awarding contracts for any additional ships. Following approval of this …
Date:
December 14, 2010
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
SALTSTONE 3QCY10 TCLP RESULTS
The Saltstone Production Facility (SPF) receives waste from Tank 50H for treatment. In the third quarter of the 2010 calendar year (3QCY10), Tank 50H accepted transfers of approximately 76 kgal from the Effluent Treatment Project (ETP), approximately 7 kgal from Tank 710 - the HCanyon General Purpose Evaporator, approximately 57 kgal from the H-Canyon Super Kukla campaign, approximately 58 kgal from the Modular Caustic Side Solvent Extraction Unit (MCU) Decontaminated Salt Solution Hold Tank (DSS-HT), and approximately 6 kgal from other sources. The Saltstone Grout Sampling plan provides the South Carolina Department of Health and Environmental Control (SCDHEC) with the chemical and physical characterization strategy for the salt solution which is to be disposed of in the Z-Area Solid Waste Landfill (ISWLF). During operation, samples were collected from Tank 50H and grout samples prepared to determine the non-hazardous nature of the grout to meet the requirements of the South Carolina Hazardous Waste Management Regulations (SCHWMR) R.61-79.261.24(b) and R.61-79.268.48(a). Savannah River National Laboratory (SRNL) was asked to prepare saltstone from samples of Tank 50H obtained July 1, 2010 during 3QCY10 to determine the non-hazardous nature of the grout. The samples were cured and shipped to Babcock & Wilcox Technical Services Group-Radioisotope …
Date:
December 14, 2010
Creator:
Reigel, M.
Object Type:
Report
System:
The UNT Digital Library
Coherent Radiation Effects in the LCLS Undulator
For X-ray Free-Electron Lasers such as LCLS and TESLA FEL, a change in the electron energy while amplifying the FEL radiation can shift the resonance condition out of the bandwidth of the FEL. The largest sources of energy loss is the emission of incoherent undulator radiation. Because the loss per electron depends only on the undulator parameters and the beam energy, which are fixed for a given resonant wavelength, the average energy loss can be compensated for by a fixed taper of the undulator. Coherent radiation has a strong enhancement proportional to the number of electrons in the bunch for frequencies comparable to or longer than the bunch dimension. If the emitted coherent energy becomes comparable to that of the incoherent emission, it has to be included in the taper as well. However, the coherent loss depends on the bunch charge and the applied compression scheme and a change of these parameters would require a change of the taper. This imposes a limitation on the practical operation of Free-Electron Lasers, where the taper can only be adjusted manually. In this presentation we analyze the coherent emission of undulator radiation and transition undulator radiation for LCLS, and estimate whether the resulting …
Date:
December 14, 2010
Creator:
Reiche, S.; /UCLA & Huang, Z.
Object Type:
Article
System:
The UNT Digital Library
Hohlraum Target Alignment from X-ray Detector Images using Starburst Design Patterns
National Ignition Facility (NIF) is a high-energy laser facility comprised of 192 laser beams focused with enough power and precision on a hydrogen-filled spherical, cryogenic target to initiate a fusion reaction. The target container, or hohlraum, must be accurately aligned to an x-ray imaging system to allow careful monitoring of the frozen fuel layer in the target. To achieve alignment, x-ray images are acquired through starburst-shaped windows cut into opposite sides of the hohlraum. When the hohlraum is in alignment, the starburst pattern pairs match nearly exactly and allow a clear view of the ice layer formation on the edge of the target capsule. During the alignment process, x-ray image analysis is applied to determine the direction and magnitude of adjustment required. X-ray detector and source are moved in concert during the alignment process. The automated pointing alignment system described here is both accurate and efficient. In this paper, we describe the control and associated image processing that enables automation of the starburst pointing alignment.
Date:
December 14, 2010
Creator:
Leach, R. R.; Conder, A.; Edwards, O.; Kroll, J.; Kozioziemski, B.; Mapoles, E. et al.
Object Type:
Article
System:
The UNT Digital Library
Generation of Coherent X-Ray Radiation Through Modulation Compression
In this letter, we propose a scheme to generate tunable coherent X-ray radiation for future light source applications. This scheme uses an energy chirped electron beam, a laser modulators, a laser chirper and two bunch compressors to generate a prebunched kilo-Ampere current electron beam from a few tens Ampere electron beam out of a linac. The initial modulation energy wavelength can be compressed by a factor of 1 + h{sub b}R{sub 56}{sup a} phase space, where h{sub b} is the energy bunch length chirp introduced by the laser chirper, R{sub 56}{sup a} is the momentum compaction factor of the first bunch compressor. As an illustration, we present an example to generate more than 400 MW, 170 atto-seconds pulse, 1 nm coherent X-ray radiation using a 60 Ampere electron beam out. of the linac and 200 nm laser seed. Both the final wavelength and the radiation pulse length in the proposed scheme are tunable by adjusting the compression factor and the laser parameters.
Date:
December 14, 2010
Creator:
Qiang, Ji & Wu, Juhao
Object Type:
Article
System:
The UNT Digital Library
Regional-Scale Climate Change: Observations and Model Simulations
This collaborative proposal addressed key issues in understanding the Earth’s climate system, as highlighted by the U.S. Climate Science Program. The research focused on documenting past climatic changes and on assessing future climatic changes based on suites of global and regional climate models. Geographically, our emphasis was on the mountainous regions of the world, with a particular focus on the Neotropics of Central America and the Hawaiian Islands. Mountain regions are zones where large variations in ecosystems occur due to the strong climate zonation forced by the topography. These areas are particularly susceptible to changes in critical ecological thresholds, and we conducted studies of changes in phonological indicators based on various climatic thresholds.
Date:
December 14, 2010
Creator:
Bradley, Raymond S. & Diaz, Henry F.
Object Type:
Text
System:
The UNT Digital Library
SCALING SOLID RESUSPENSION AND SORPTION FOR THE SMALL COLUMN ION EXCHANGE PROCESSING TANK
The Small Column Ion Exchange (SCIX) process is being developed to remove cesium, strontium, and actinides from Savannah River Site (SRS) Liquid Waste using an existing 1.3 million gallon waste tank (i.e., Tank 41H) to house the process. Savannah River National Laboratory (SRNL) is conducting pilot-scale mixing tests to determine the pump requirements for suspending and resuspending Monosodium Titanate (MST), Crystalline Silicotitanate (CST), and simulated sludge. In addition, SRNL will also be conducting pilot-scale tests to determine the mixing requirements for the strontium and actinide sorption. As part of this task, the results from the pilot-scale tests must be scaled up to a full-scale waste tank. This document describes the scaling approach. The pilot-scale tank is a 1/10.85 linear scale model of Tank 41H. The tank diameter, tank liquid level, pump nozzle diameter, pump elevation, and cooling coil diameter are all 1/10.85 of their dimensions in Tank 41H. The pump locations correspond to the proposed locations in Tank 41H by the SCIX Program (Risers B5 and B2 for two pump configurations and Risers B5, B3, and B1 for three pump configurations). MST additions are through Riser E1, the proposed MST addition riser in Tank 41H. To determine the approach to …
Date:
December 14, 2010
Creator:
Poirier, M. & Qureshi, Z.
Object Type:
Report
System:
The UNT Digital Library
P.L. 94-171 County Block Map (2010 Census): Donley County, Inset A01
Inset map for Donley County, Texas showing detail within a census block for which the U.S. Census Bureau collected data. The plotted map scale is 1:3,834.
Date:
December 14, 2010
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History
P.L. 94-171 County Block Map (2010 Census): Nacogdoches County, Block 8
Parent map for Nacogdoches County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:19,000.
Date:
December 14, 2010
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History
P.L. 94-171 County Block Map (2010 Census): Eastland County, Block 3
Parent map for Eastland County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:19,000.
Date:
December 14, 2010
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History
P.L. 94-171 County Block Map (2010 Census): Victoria County, Block 20
Parent map for Victoria County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:19,000.
Date:
December 14, 2010
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History
P.L. 94-171 County Block Map (2010 Census): Uvalde County, Block 21
Parent map for Uvalde County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,000.
Date:
December 14, 2010
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History
P.L. 94-171 County Block Map (2010 Census): Duval County, Block 23
Parent map for Duval County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:22,000.
Date:
December 14, 2010
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History
P.L. 94-171 County Block Map (2010 Census): Trinity County, Block 7
Parent map for Trinity County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:25,000.
Date:
December 14, 2010
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History
P.L. 94-171 County Block Map (2010 Census): Nueces County, Block 30
Parent map for Nueces County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:15,000.
Date:
December 14, 2010
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History
P.L. 94-171 County Block Map (2010 Census): La Salle County, Block 17
Parent map for La Salle County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:20,000.
Date:
December 14, 2010
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History
P.L. 94-171 County Block Map (2010 Census): Nueces County, Inset B06
Inset map for Nueces County, Texas showing detail within a census block for which the U.S. Census Bureau collected data. The plotted map scale is 1:9,000.
Date:
December 14, 2010
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History
P.L. 94-171 County Block Map (2010 Census): Uvalde County, Block 30
Parent map for Uvalde County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,000.
Date:
December 14, 2010
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History
P.L. 94-171 County Block Map (2010 Census): Brewster County, Block 74
Parent map for Brewster County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:19,000.
Date:
December 14, 2010
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History
P.L. 94-171 County Block Map (2010 Census): Uvalde County, Block 16
Parent map for Uvalde County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,000.
Date:
December 14, 2010
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History
P.L. 94-171 County Block Map (2010 Census): Bee County, Block 13
Parent map for Bee County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:20,000.
Date:
December 14, 2010
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History