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Alien Detention Standards: Telephone Access Problems Were Pervasive at Detention Facilities; Other Deficiencies Did Not Show a Pattern of Noncompliance (open access)

Alien Detention Standards: Telephone Access Problems Were Pervasive at Detention Facilities; Other Deficiencies Did Not Show a Pattern of Noncompliance

A letter report issued by the Government Accountability Office with an abstract that begins "The total number of aliens detained per year by the Department of Homeland Security's (DHS) U.S. Immigration and Customs Enforcement (ICE) increased from about 95,000 in fiscal year 2001 to 283,000 in 2006. The care and treatment of these detained aliens is a significant challenge to ICE. GAO was asked to review ICE's implementation of its detention standards for aliens in its custody. GAO reviewed (1) detention facilities' compliance with ICE's detention standards, (2) ICE's compliance review process, and (3) how detainee complaints regarding conditions of confinement are handled. To conduct its work, GAO reviewed DHS documents, interviewed program officials, and visited 23 detention facilities of varying size, type, and geographic location."
Date: July 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
DOD Schools: Additional Reporting Could Improve Accountability for Academic Achievement of Students with Dyslexia (open access)

DOD Schools: Additional Reporting Could Improve Accountability for Academic Achievement of Students with Dyslexia

A letter report issued by the Government Accountability Office with an abstract that begins "Many of our nation's military and civilian personnel depend on Department of Defense (DOD) schools to meet their children's educational needs. These schools provide a range of educational services including programs for students with disabilities and those who struggle to read, some of whom may have a condition referred to as dyslexia. To determine how DOD supports students with dyslexia and how it used $3.2 million in funds designated to support them, GAO was asked to examine: (1) what professional development DOD provides its staff to support students with dyslexia and how the fiscal year 2004-to-2006 funds designated for this purpose were used, (2) what identification and instructional services DOD provides to students who may have dyslexia, and (3) how DOD assesses the academic achievement of students with disabilities, including dyslexia. To address these objectives, GAO conducted a survey of all school principals and interviewed agency officials, school personnel, and parents in six school districts."
Date: December 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Stabilization and Reconstruction: Actions Are Needed to Develop a Planning and Coordination Framework and Establish the Civilian Reserve Corps (open access)

Stabilization and Reconstruction: Actions Are Needed to Develop a Planning and Coordination Framework and Establish the Civilian Reserve Corps

A letter report issued by the Government Accountability Office with an abstract that begins "In 2004, the Department of State created the Office of the Coordinator for Reconstruction and Stabilization to coordinate U.S. planning and implementation of stabilization and reconstruction operations. In December 2005, President Bush issued National Security Presidential Directive 44 (NSPD-44), charging State with improving coordination, planning, and implementation of such operations and ensuring that the United States can respond quickly and effectively to overseas crises. GAO was asked to report on State's efforts to improve (1) interagency planning and coordination for stabilization and reconstruction operations, and (2) deployment of civilians to these operations. To address these objectives, we conducted interviews with officials and reviewed documents from U.S. agencies and government and private research centers."
Date: November 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Telecommunications: FCC Should Take Steps to Ensure Equal Access to Rulemaking Information (open access)

Telecommunications: FCC Should Take Steps to Ensure Equal Access to Rulemaking Information

A letter report issued by the Government Accountability Office with an abstract that begins "The Federal Communications Commission (FCC) is charged with regulating interstate and international communications by radio, television, wire, satellite, and cable. The Telecommunications Act of 1996 established that FCC should promote competition and reduce regulation to secure lower prices and higher-quality services for American consumers. FCC implements its policy aims through rulemaking, whereby the agency notifies the public of a proposed rule and provides an opportunity for the public to participate in the rule's development. These rulemakings are documented within a public docket that contains the rulemaking record. In response to a congressional request on FCC rulemaking, GAO (1) described FCC's rulemaking process; (2) determined, for specific rulemakings, the extent to which FCC followed its process; and (3) identified factors that contributed to some dockets and rulemakings remaining open. GAO reviewed recent FCC rules, interviewed FCC officials and stakeholders, and conducted case studies of rulemakings."
Date: September 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Bankruptcy Reform: Value of Credit Counseling Requirement Is Not Clear (open access)

Bankruptcy Reform: Value of Credit Counseling Requirement Is Not Clear

A letter report issued by the Government Accountability Office with an abstract that begins "The Bankruptcy Abuse Prevention and Consumer Protection Act of 2005 requires individuals to receive credit counseling before filing for bankruptcy and to take a debtor education course before having debts discharged. Concerns were raised that the new requirements could expose consumers to abusive practices by credit counseling agencies or become barriers to filing for bankruptcy. GAO was asked to examine (1) the process of approving counseling and education providers, (2) the content and results of the counseling and education sessions, (3) the fees charged, and (4) the availability of and challenges to accessing services. To address these issues, GAO reviewed Trustee Program data and application case files, and interviewed a wide range of individuals and groups involved in the bankruptcy process."
Date: April 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Global War on Terrorism: DOD Needs to Take Action to Encourage Fiscal Discipline and Optimize the Use of Tools Intended to Improve GWOT Cost Reporting (open access)

Global War on Terrorism: DOD Needs to Take Action to Encourage Fiscal Discipline and Optimize the Use of Tools Intended to Improve GWOT Cost Reporting

A letter report issued by the Government Accountability Office with an abstract that begins "Since the September 2001 terrorist attacks, Congress has provided about $542.9 billion, as of May 2007, to the Department of Defense (DOD) for the Global War on Terrorism (GWOT). Prior GAO reports have found DOD's reported GWOT obligation data unreliable and problems with transparency over certain costs. DOD made changes to its reporting procedures, requiring components to perform a monthly variance analysis on obligation data and to include affirmation statements attesting to the accuracy of cost data. Under the Comptroller General's authority to conduct evaluations on his own initiative, GAO assessed (1) the outlook of DOD's reported GWOT obligations for fiscal year 2007 and funding requests for fiscal year 2008, (2) the effect of changes in DOD's GWOT funding guidance, and (3) DOD's progress in implementing variance analysis and affirmation statements. For this engagement, GAO analyzed fiscal year 2007 GWOTrelated appropriations and reported obligations, as well as DOD's corrective actions."
Date: November 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Defense Acquisitions: Role of Lead Systems Integrator on Future Combat Systems Program Poses Oversight Challenges (open access)

Defense Acquisitions: Role of Lead Systems Integrator on Future Combat Systems Program Poses Oversight Challenges

A letter report issued by the Government Accountability Office with an abstract that begins "The Army's Future Combat Systems (FCS) program features multiple new systems linked by a first-of-a-kind information network. The Army contracted with a lead systems integrator (LSI) for FCS that could serve in a more expansive role than a typical prime contractor would. In response to a congressional mandate, this report addresses (1) why the Army decided to employ an LSI for the FCS program; (2) the nature of the LSI's working relationship with the Army; and (3) how FCS contract fees, provisions, and incentives work. In conducting its work, GAO reviewed extensive program documentation and held discussions with key officials at DOD and throughout the FCS program."
Date: June 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Veterans' Benefits: Improved Operational Controls and Management Data Would Enhance VBA's Disability Reevaluation Process (open access)

Veterans' Benefits: Improved Operational Controls and Management Data Would Enhance VBA's Disability Reevaluation Process

A letter report issued by the Government Accountability Office with an abstract that begins "To help ensure that veterans are properly compensated for disabilities, VA is required to perform disability reevaluations for specific disabilities. VA also performs reevaluations whenever it determines there is a need to verify either the continued existence or current severity of veterans' disabilities. VBA completed about 17,700 reevaluations in fiscal year 2005. GAO was asked to review the Veterans Benefits Administration's (VBA) disability reevaluation program. This report assesses (1) the operational controls VA uses to ensure the effectiveness of the disability reevaluation process and (2) the management information VA collects and uses to manage the disability reevaluation process. To conduct this study, GAO analyzed VBA data, reviewed federal regulations and VBA procedures, conducted site visits, and interviewed VBA officials."
Date: December 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Employer-Sponsored Benefits: Many Factors Affect the Treatment of Pension and Health Benefits in Chapter 11 Bankruptcy (open access)

Employer-Sponsored Benefits: Many Factors Affect the Treatment of Pension and Health Benefits in Chapter 11 Bankruptcy

A letter report issued by the Government Accountability Office with an abstract that begins "In recent years, considerable debate has centered on companies using the chapter 11 bankruptcy reorganization process to reduce or eliminate employer-sponsored benefits in an effort to become more competitive. Congress recently enacted several laws, in part, to help address this issue. Most notably, Congress passed the Bankruptcy Abuse Prevention and Consumer Protection Act of 2005 (BAPCPA) and the Pension Protection Act of 2006 (PPA). BAPCPA contained provisions related to chapter 11 business bankruptcies and sought to address the treatment of benefits during the bankruptcy process. In addition, the PPA amended several Employee Retirement Income Security Act of 1974 (ERISA) provisions related to defined benefit (DB) plans in bankruptcy. This report addresses (1) how, if at all, recent legislative changes affected the treatment of pension and health benefits during chapter 11 bankruptcies, and (2) what is known about the extent to which businesses have modified employee or retiree pension and health benefits. GAO reviewed filings of 115 public companies that filed for bankruptcy between October 17, 2004 and October 17, 2006, and conducted interviews with various experts on the treatment of benefits in the bankruptcy process. Relevant …
Date: September 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Chemical Demilitarization: Additional Management Actions Needed to Meet Key Performance Goals of DOD's Chemical Demilitarization Program (open access)

Chemical Demilitarization: Additional Management Actions Needed to Meet Key Performance Goals of DOD's Chemical Demilitarization Program

A letter report issued by the Government Accountability Office with an abstract that begins "Destruction of the nation's remaining stockpile of chemical weapons in a safe, efficient, and timely manner is essential to meet Chemical Weapons Convention treaty obligations and to reduce the risk of a potential catastrophic event. The Department of Defense (DOD) established the Chemical Demilitarization Program to manage the destruction of the remaining stockpile. GAO was asked to evaluate the (1) progress DOD and the Army have made in addressing GAO's prior recommendations to strengthen program management, (2) reasonableness of schedule milestones, (3) reliability of cost estimates, and (4) effectiveness of efforts to provide monetary incentives to the systems contractors. GAO reviewed relevant planning documents, schedules, cost estimates, and contracts; interviewed program and contractor officials; and visited chemical agent destruction sites."
Date: December 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Military Training: Actions Needed to More Fully Develop the Army's Strategy for Training Modular Brigades and Address Implementation Challenges (open access)

Military Training: Actions Needed to More Fully Develop the Army's Strategy for Training Modular Brigades and Address Implementation Challenges

A letter report issued by the Government Accountability Office with an abstract that begins "The Army considers modular force transformation its most extensive restructuring since World War II. The Army has estimated that restructuring units from a division-based force to a more agile and responsive modular brigade-based force will require a significant investment through fiscal year 2011. To facilitate this transformation, Public Law No. 109-163 Section 353 directs the Army to develop and implement a training strategy for the modular brigades. This law also directs GAO to report on the implementation of the strategy. This report discusses (1) the extent to which the Army's training strategy addresses the five elements specified in the public law and (2) the actions the Army has taken to implement its training strategy and the implementation challenges it faces. To address these objectives, GAO reviewed Army training strategy documentation and interviewed Army training personnel."
Date: August 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Pension Benefit Guaranty Corporation: Governance Structure Needs Improvements to Ensure Policy Direction and Oversight (open access)

Pension Benefit Guaranty Corporation: Governance Structure Needs Improvements to Ensure Policy Direction and Oversight

A letter report issued by the Government Accountability Office with an abstract that begins "The Pension Benefit Guaranty Corporation (PBGC) insures the pensions of millions of private sector workers and retirees in certain employer-sponsored pension plans. It is governed by a board of directors consisting of the Secretaries of the Treasury, Labor, and Commerce, who are charged with providing PBGC with policy direction and oversight. This report assesses (1) the extent to which PBGC's governance structure provides PBGC with policy direction and oversight, and (2) whether administrative responsibilities among the PBGC board, Department of Labor (DOL), and PBGC management are clearly defined. We examined corporate governance practices, select federal government corporations, and reviewed documents on PBGC's structure. We interviewed officials from all board member agencies and PBGC, among others."
Date: July 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
National Animal Identification System: USDA Needs to Resolve Several Key Implementation Issues to Achieve Rapid and Effective Disease Traceback (open access)

National Animal Identification System: USDA Needs to Resolve Several Key Implementation Issues to Achieve Rapid and Effective Disease Traceback

A letter report issued by the Government Accountability Office with an abstract that begins "Livestock production contributed nearly $123 billion to the U.S. economy in 2006. In response to concerns about animal disease outbreaks, the U.S. Department of Agriculture (USDA) announced in December 2003 that it would implement a nationwide program--later named the National Animal Identification System (NAIS)--to help producers and animal health officials respond quickly and effectively to animal disease events in the United States. In this context, GAO determined (1) how effectively USDA is implementing NAIS and, specifically, the key issues identified by livestock industry groups, market operators, state officials, and others; (2) how USDA has distributed cooperative agreement funds to help states and industry prepare for NAIS and evaluated the agreements' results; and (3) what USDA and others estimate are the costs for USDA, states, and industry to implement NAIS. In conducting its work, GAO reviewed USDA documents; interviewed agency, industry, and state officials; and consulted 32 animal identification (ID) experts."
Date: July 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Railroad Bridges and Tunnels: Federal Role in Providing Safety Oversight and Freight Infrastructure Investment Could Be Better Targeted (open access)

Railroad Bridges and Tunnels: Federal Role in Providing Safety Oversight and Freight Infrastructure Investment Could Be Better Targeted

A letter report issued by the Government Accountability Office with an abstract that begins "Freight railroads account for over 40 percent (by weight) of the nation's freight on a privately owned network that was largely built almost 100 years ago and includes over 76,000 railroad bridges and over 800 tunnels. As requested, GAO provides information on this infrastructure, addressing (1) the information that is available on the condition of railroad bridges and tunnels and on their contribution to railroad congestion, (2) the federal role in overseeing railroad bridge and tunnel safety, (3) the current uses of public funds for railroad infrastructure investments, and (4) criteria and a framework for guiding any future federal role in freight infrastructure investments. GAO reviewed federal bridge safety guidelines and reports, conducted site visits, and interviewed federal, state, railroad, and other officials."
Date: August 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
International Organizations: Assistance Programs Constrained in Burma (open access)

International Organizations: Assistance Programs Constrained in Burma

A letter report issued by the Government Accountability Office with an abstract that begins "Burma is one of the world's most impoverished and isolated countries. The United Nations (UN) and other international organizations have become important sources of outside assistance to the country. In recent years, UN entities have increased their funding for activities aimed at addressing Burma's problems. However, Burma's military regime has imposed restrictions on international organizations' activities in Burma. GAO (1) identified principal efforts of the United Nations and other international organizations to address Burma's problems and (2) described the impact of the regime's recent actions on these efforts. We reviewed UN, U.S., and Burmese official documents and interviewed UN, U.S., Burmese, and nongovernmental organization officials in the United States and Burma. We also visited UN project sites in Burma."
Date: April 6, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
BOA, Beam Optics Analyzer A Particle-In-Cell Code (open access)

BOA, Beam Optics Analyzer A Particle-In-Cell Code

The program was tasked with implementing time dependent analysis of charges particles into an existing finite element code with adaptive meshing, called Beam Optics Analyzer (BOA). BOA was initially funded by a DOE Phase II program to use the finite element method with adaptive meshing to track particles in unstructured meshes. It uses modern programming techniques, state-of-the-art data structures, so that new methods, features and capabilities are easily added and maintained. This Phase II program was funded to implement plasma simulations in BOA and extend its capabilities to model thermal electrons, secondary emissions, self magnetic field and implement a more comprehensive post-processing and feature-rich GUI. The program was successful in implementing thermal electrons, secondary emissions, and self magnetic field calculations. The BOA GUI was also upgraded significantly, and CCR is receiving interest from the microwave tube and semiconductor equipment industry for the code. Implementation of PIC analysis was partially successful. Computational resource requirements for modeling more than 2000 particles begin to exceed the capability of most readily available computers. Modern plasma analysis typically requires modeling of approximately 2 million particles or more. The problem is that tracking many particles in an unstructured mesh that is adapting becomes inefficient. In particular …
Date: December 6, 2007
Creator: Bui, Thuc
System: The UNT Digital Library
Butt Joint Tool Commissioning (open access)

Butt Joint Tool Commissioning

ITER Central Solenoid uses butt joints for connecting the pancakes in the CS module. The principles of the butt joining of the CICC were developed by the JAPT during CSMC project. The difference between the CSMC butt joint and the CS butt joint is that the CS butt joint is an in-line joint, while the CSMC is a double joint through a hairpin jumper. The CS butt joint has to carry the hoop load. The straight length of the joint is only 320 mm, and the vacuum chamber around the joint has to have a split in the clamp shell. These requirements are challenging. Fig.1 presents a CSMC joint, and Fig.2 shows a CS butt joint. The butt joint procedure was verified and demonstrated. The tool is capable of achieving all specified parameters. The vacuum in the end was a little higher than the target, which is not critical and readily correctable. We consider, tentatively that the procedure is established. Unexpectedly, we discover significant temperature nonuniformity in the joint cross section, which is not formally a violation of the specs, but is a point of concern. All testing parameters are recorded for QA purposes. We plan to modify the butt …
Date: December 6, 2007
Creator: Martovetsky, N. N.
System: The UNT Digital Library
Idaho CERCLA Disposal Facility Complex Compliance Demonstration for DOE Order 435.1 (open access)

Idaho CERCLA Disposal Facility Complex Compliance Demonstration for DOE Order 435.1

This compliance demonstration document provides an analysis of the Idaho CERCLA Disposal Facility (ICDF) Complex compliance with DOE Order 435.1. The ICDF Complex includes the disposal facility (landfill), evaporation pond, administration facility, weigh scale, and various staging/storage areas. These facilities were designed and constructed to be compliant with DOE Order 435.1, Resource Conservation and Recovery act Subtitle C, and Toxic Substances Control Act polychlorinated biphenyl design and construction standards. The ICDF Complex is designated as the Idaho National Laboratory (INL) facility for the receipt, staging/storage, treatment, and disposal of INL Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) waste streams.
Date: November 6, 2007
Creator: Simonds, J.
System: The UNT Digital Library
The Market Viability of Nuclear Hydrogen Technologies. (open access)

The Market Viability of Nuclear Hydrogen Technologies.

The Department of Energy Office of Nuclear Energy is supporting system studies to gain a better understanding of nuclear power's potential role in a hydrogen economy and what hydrogen production technologies show the most promise. This assessment includes identifying commercial hydrogen applications and their requirements, comparing the characteristics of nuclear hydrogen systems to those market requirements, evaluating nuclear hydrogen configuration options within a given market, and identifying the key drivers and thresholds for market viability of nuclear hydrogen options. One of the objectives of the current analysis phase is to determine how nuclear hydrogen technologies could evolve under a number of different futures. The outputs of our work will eventually be used in a larger hydrogen infrastructure and market analysis conducted for DOE-EE using a system-level market simulation tool now underway. This report expands on our previous work by moving beyond simple levelized cost calculations and looking at profitability, risk, and uncertainty from an investor's perspective. We analyze a number of technologies and quantify the value of certain technology and operating characteristics. Our model to assess the profitability of the above technologies is based on Real Options Theory and calculates the discounted profits from investing in each of the production …
Date: April 6, 2007
Creator: Botterud, A.; Conzelmann, G.; Petri, M. C. & Yildiz, B.
System: The UNT Digital Library
Electronic and Sturctural Transitions in Dense Liquid Sodium (open access)

Electronic and Sturctural Transitions in Dense Liquid Sodium

At ambient conditions, the light alkali metals are free-electron like crystals with a highly symmetric structure. However, they were shown recently to exhibit unexpected complexity under pressure. It was predicted from theory and later confirmed by experiment that Li and Na undergo a sequence of symmetry breaking transitions driven by a Peierls mechanism. Most recently, measurements of the Na melting curve revealed an unprecedented and still unexplained drop in the melting temperature from 1000 K at 30 GPa to room temperature at 120 GPa. Here we report results from ab initio calculations that explain the unusual melting behavior in dense Na. We show that molten Na undergoes a series of pressure-induced structural and electronic transitions analogous to that observed in solid Na, but commencing at much lower pressure in the presence of disorder. With increasing pressure, liquid Na initially evolves by assuming a more compact local structure. However, a transition to a lower coordinated liquid takes place at a pressure around 65 GPa, accompanied by a threefold drop in electrical conductivity. A pseudogap opening at the Fermi level, an effect previously not observed in a liquid metal, drives this transition. Remarkably, the lower coordinated liquid emerges at rather elevated temperatures …
Date: August 6, 2007
Creator: Raty, J Y; Schwegler, E R & Bonev, S A
System: The UNT Digital Library
Diffusion of Zonal Variables Using Node-Centered Diffusion Solver (open access)

Diffusion of Zonal Variables Using Node-Centered Diffusion Solver

Tom Kaiser [1] has done some preliminary work to use the node-centered diffusion solver (originally developed by T. Palmer [2]) in Kull for diffusion of zonal variables such as electron temperature. To avoid numerical diffusion, Tom used a scheme developed by Shestakov et al. [3] and found their scheme could, in the vicinity of steep gradients, decouple nearest-neighbor zonal sub-meshes leading to 'alternating-zone' (red-black mode) errors. Tom extended their scheme to couple the sub-meshes with appropriate chosen artificial diffusion and thereby solved the 'alternating-zone' problem. Because the choice of the artificial diffusion coefficient could be very delicate, it is desirable to use a scheme that does not require the artificial diffusion but still able to avoid both numerical diffusion and the 'alternating-zone' problem. In this document we present such a scheme.
Date: August 6, 2007
Creator: Yang, T B
System: The UNT Digital Library
Development/Demonstration of an Advanced Oxy-Fuel Front-End System (open access)

Development/Demonstration of an Advanced Oxy-Fuel Front-End System

Owens Corning and other glass manufacturers have used oxy-fuel combustion technology successfully in furnaces to reduce emissions, increase throughput, reduce fuel consumption and, depending on the costs of oxygen and fuel, reduce energy costs. The front end of a fiberglass furnace is the refractory channel system that delivers glass from the melter to the forming process. After the melter, it is the second largest user of energy in a fiberglass plant. A consortium of glass companies and suppliers, led by Owens Corning, was formed to develop and demonstrate oxy/fuel combustion technology for the front end of a fiberglass melter, to demonstrate the viability of this energy saving technology to the U.S. glass industry, as a D.O.E. sponsored project. The project goals were to reduce natural gas consumption and CO2 green house gas emissions by 65 to 70% and create net cost savings after the purchase of oxygen to achieve a project payback of less than 2 years. Project results in Jackson, TN included achieving a 56% reduction in gas consumption and CO2 emissions. A subsequent installation in Guelph ON, not impacted by unrelated operational changes in Jackson, achieved a 64% reduction. Using the more accurate 64% reduction in the payback …
Date: August 6, 2007
Creator: Mighton, Steven, J.
System: The UNT Digital Library
Evaluating Cumulative Ecosystem Response to Restoration Projects in the Columbia River Estuary, Annual Report 2006 (open access)

Evaluating Cumulative Ecosystem Response to Restoration Projects in the Columbia River Estuary, Annual Report 2006

This report is the third annual report of a six-year project to evaluate the cumulative effects of habitat restoration action in the Columbia River Estuary (CRE). The project is being conducted for the U.S. Army Corps of Engineers (Corps) by the Marine Sciences Laboratory of the Pacific Northwest National Laboratory, the Pt. Adams Biological Field Station of the National Marine Fisheries Service, and the Columbia River Estuary Study Taskforce. Measurement of the cumulative effects of ecological restoration projects in the Columbia River estuary is a formidable task because of the size and complexity of the estuarine landscape and the meta-populations of salmonids in the Columbia River basin. Despite the challenges presented by this system, developing and implementing appropriate indicators and methods to measure cumulative effects is the best way to enable estuary managers to track the overall effectiveness of investments in estuarine restoration projects. This project is developing methods to quantify the cumulative effects of multiple restoration activities in the CRE. The overall objectives of the 2006 study were to continue to develop techniques to assess cumulative effects, refine the standard monitoring protocols, and initiate development of an adaptive management system for Corps of Engineers’ habitat restoration monitoring efforts in …
Date: December 6, 2007
Creator: Johnson, Gary E.; Borde, Amy B.; Dawley, Earl; Diefenderfer, Heida L.; Ebberts, Blaine D.; Putman, Douglas A. et al.
System: The UNT Digital Library
Effect of Twist Pitch in the Strands on the Saturation and Losses in the Nb3Sn Strands for the ITER TF CICC (open access)

Effect of Twist Pitch in the Strands on the Saturation and Losses in the Nb3Sn Strands for the ITER TF CICC

ITER TF coils will see a significant longitudinal magnetic field in the event of the plasma disruption. This abrupt change of magnetic fields results in the appearance of an additional electrical field in the strands. The mechanism of this electrical field is the induced currents that expel the flux from the strands. This effect was known since the late 1970's [1-3] and most of the details necessary for the analyses given in this report are presented in [4]. Let's assume for simplicity a zero transport current in the strand. When a longitudinal pulsed field is applied, the outer filaments will carry an induced current repelling the change of flux. The current density of this current is 'critical' in the simplification of Bean's critical state model, where superconducting transition is represented as j=j{sub c} at any non-zero electrical field and zero where the electrical field has not penetrated. In reality, since the current density is roughly logarithmic with the electrical field, E=E{sub c}*exp[(j-j{sub c})/jo], Bean's model is just a simplification, and current density is slightly nonuniform in the outer filament and more so for the interior strands. The inner portion of the filaments will carry a current of the opposite sign. …
Date: December 6, 2007
Creator: Martovetsky, N. N.
System: The UNT Digital Library