Analysis of AGS E880 polarimeter data at Gy = 12.5. (open access)

Analysis of AGS E880 polarimeter data at Gy = 12.5.

Data were collected with the AGS internal (E880) polarimeter at G{gamma} = 12.5 during the FY04 polarized proton run. Measurements were made with forward scintillation counters in coincidence with recoil counter telescopes, permitting an absolute calibration of the polarimeter for both nylon and carbon targets. The results are summarized and they will also be useful for an absolute calibration of the AGS CNI polarimeter at G{gamma} = 12.5.
Date: February 23, 2012
Creator: Cadman, R.; Huang, H.; Krueger, K.; Spinka, H.; Underwood, D. (High Energy Physics) & Laboratory), (Brookhaven National
System: The UNT Digital Library
The Arecibo Ionospheric Observatory (open access)

The Arecibo Ionospheric Observatory

This is a report about the Arecibo Ionospheric Observatory.
Date: February 23, 2012
Creator: Matthews, Christine M.
System: The UNT Digital Library
The Congressional Appropriations Process: An Introduction (open access)

The Congressional Appropriations Process: An Introduction

This report provides information about The Introduction of Congressional Appropriations Process. Congress has developed certain rules and practices for the consideration of appropriate measures, referred to as Congressional Appropriations Process.
Date: February 23, 2012
Creator: Streeter, Sandy
System: The UNT Digital Library
The Congressional Appropriations Process: An Introduction (open access)

The Congressional Appropriations Process: An Introduction

Congress annually considers several appropriations measures, which provide funding for numerous activities, for example, national defense, education, and homeland security, as well as general government operations. Congress has developed certain rules and practices for the consideration of appropriations measures, referred to as the congressional appropriations process. This report looks at this process as well as the three types of appropriates measures: regular appropriations bills, continuing resolutions, and supplemental appropriations bills.
Date: February 23, 2012
Creator: Tollestrup, Jessica
System: The UNT Digital Library
Deepwater Horizon Oil Spill: Highlighted Activities (open access)

Deepwater Horizon Oil Spill: Highlighted Activities

A look at legislative reforms that have been passed and are in process in the wake of the Deepwater Horizon oil spill on April 20, 2010.
Date: February 23, 2012
Creator: Ramseur, Jonathan L.
System: The UNT Digital Library
The Depreciating Dollar: Economic Effects and Policy Response (open access)

The Depreciating Dollar: Economic Effects and Policy Response

This report discusses the trend of depreciation of the dollar since 2002. This raises concern among some in Congress and the public that the dollar's decline is a symptom of broader economic problems, such as a weak economic recovery, rising public debt, and a diminished standing in the global economy. However, a falling currency is not always a problem, but possibly an element of economic adjustments that are, on balance, beneficial to the economy.
Date: February 23, 2012
Creator: Elwell, Craig K.
System: The UNT Digital Library
Fusion Nuclear Science Pathways Assessment (open access)

Fusion Nuclear Science Pathways Assessment

With the strong commitment of the US to the success of the ITER burning plasma mission, and the project overall, it is prudent to consider how to take the most advantage of this investment. The production of energy from fusion has been a long sought goal, and the subject of several programmatic investigations and time line proposals [1]. The nuclear aspects of fusion research have largely been avoided experimentally for practical reasons, resulting in a strong emphasis on plasma science. Meanwhile, ITER has brought into focus how the interface between the plasma and engineering/technology, presents the most challenging problems for design. In fact, this situation is becoming the rule and no longer the exception. ITER will demonstrate the deposition of 0.5 GW of neutron heating to the blanket, deliver a heat load of 10-20 MW/m2 or more on the divertor, inject 50-100 MW of heating power to the plasma, all at the expected size scale of a power plant. However, in spite of this, and a number of other technologies relevant power plant, ITER will provide a low neutron exposure compared to the levels expected to a fusion power plant, and will purchase its tritium entirely from world reserves accumulated …
Date: February 23, 2012
Creator: C.E. Kessel, et. al.
System: The UNT Digital Library
The Global Challenge of HIV/AIDS, Tuberculosis, and Malaria (open access)

The Global Challenge of HIV/AIDS, Tuberculosis, and Malaria

This report examines formal interagency collaborative arrangements and activities, which are intended to enhance joint efforts and cooperation among independent federal agencies with shared responsibilities and overlapping jurisdictions. This report highlights some of the current challenges posed by HIV/AIDS, TB, and malaria, as well as several crosscutting policy issues that the 112th Congress may consider as it determines U.S. global health funding for these three diseases, including: Health Systems Strengthening, Country Ownership, Research and Development, Monitoring and Evaluation; and Bilateral vs. Multilateral Support.
Date: February 23, 2012
Creator: Kendall, Alexandra E.
System: The UNT Digital Library
Iraq: Politics, Governance, and Human Rights (open access)

Iraq: Politics, Governance, and Human Rights

This report discusses the situation immediately following the completion of the U.S. withdrawal from Iraq on December 18, 2011, when relations among major political factions worsened substantially, threatening Iraq's stability and the legacy of the U.S. intervention in Iraq. It includes an overview of historical and current political, military, and governance issues as well as an analysis of Iraq in relation to the other nations in the region.
Date: February 23, 2012
Creator: Katzman, Kenneth
System: The UNT Digital Library
Optimality and Conductivity for Water Flow: From Landscapes, to Unsaturated Soils, to Plant Leaves (open access)

Optimality and Conductivity for Water Flow: From Landscapes, to Unsaturated Soils, to Plant Leaves

Optimality principles have been widely used in many areas. Based on an optimality principle that any flow field will tend toward a minimum in the energy dissipation rate, this work shows that there exists a unified form of conductivity relationship for three different flow systems: landscapes, unsaturated soils and plant leaves. The conductivity, the ratio of water flux to energy gradient, is a power function of water flux although the power value is system dependent. This relationship indicates that to minimize energy dissipation rate for a whole system, water flow has a small resistance (or a large conductivity) at a location of large water flux. Empirical evidence supports validity of the relationship for landscape and unsaturated soils (under gravity dominated conditions). Numerical simulation results also show that the relationship can capture the key features of hydraulic structure for a plant leaf, although more studies are needed to further confirm its validity. Especially, it is of interest that according to this relationship, hydraulic conductivity for gravity-dominated unsaturated flow, unlike that defined in the classic theories, depends on not only capillary pressure (or saturation), but also the water flux. Use of the optimality principle allows for determining useful results that are applicable …
Date: February 23, 2012
Creator: Liu, H.H.
System: The UNT Digital Library
Physics of Intrinsic Rotation in Flux-Driven ITG Turbulence (open access)

Physics of Intrinsic Rotation in Flux-Driven ITG Turbulence

Global, heat flux-driven ITG gyrokinetic simulations which manifest the formation of macroscopic, mean toroidal flow profiles with peak thermal Mach number 0.05, are reported. Both a particle-in-cell (XGC1p) and a semi-Lagrangian (GYSELA) approach are utilized without a priori assumptions of scale-separation between turbulence and mean fields. Flux-driven ITG simulations with different edge flow boundary conditions show in both approaches the development of net unidirectional intrinsic rotation in the co-current direction. Intrinsic torque is shown to scale approximately linearly with the inverse scale length of the ion temperature gradient. External momentum input is shown to effectively cancel the intrinsic rotation profile, thus confirming the existence of a local residual stress and intrinsic torque. Fluctuation intensity, intrinsic torque and mean flow are demonstrated to develop inwards from the boundary. The measured correlations between residual stress and two fluctuation spectrum symmetry breakers, namely E x B shear and intensity gradient, are similar. Avalanches of (positive) heat flux, which propagate either outwards or inwards, are correlated with avalanches of (negative) parallel momentum flux, so that outward transport of heat and inward transport of parallel momentum are correlated and mediated by avalanches. The probability distribution functions of the outward heat flux and the inward momentum …
Date: February 23, 2012
Creator: Ku, S.; Dimond, P. H.; Dif-Pradalier, G.; Kwon, J. M.; Sarazin, Y.; Hahm, T. S. et al.
System: The UNT Digital Library
Validation of New Process Models for Large Injection-Molded Long-Fiber Thermoplastic Composite Structures (open access)

Validation of New Process Models for Large Injection-Molded Long-Fiber Thermoplastic Composite Structures

This report describes the work conducted under the CRADA Nr. PNNL/304 between Battelle PNNL and Autodesk whose objective is to validate the new process models developed under the previous CRADA for large injection-molded LFT composite structures. To this end, the ARD-RSC and fiber length attrition models implemented in the 2013 research version of Moldflow was used to simulate the injection molding of 600-mm x 600-mm x 3-mm plaques from 40% glass/polypropylene (Dow Chemical DLGF9411.00) and 40% glass/polyamide 6,6 (DuPont Zytel 75LG40HSL BK031) materials. The injection molding was performed by Injection Technologies, Inc. at Windsor, Ontario (under a subcontract by Oak Ridge National Laboratory, ORNL) using the mold offered by the Automotive Composite Consortium (ACC). Two fill speeds under the same back pressure were used to produce plaques under slow-fill and fast-fill conditions. Also, two gating options were used to achieve the following desired flow patterns: flows in edge-gated plaques and in center-gated plaques. After molding, ORNL performed measurements of fiber orientation and length distributions for process model validations. The structure of this report is as follows. After the Introduction (Section 1), Section 2 provides a summary of the ARD-RSC and fiber length attrition models. A summary of model implementations in …
Date: February 23, 2012
Creator: Nguyen, Ba Nghiep; Jin, Xiaoshi; Wang, Jin; Kunc, Vlastimil & Tucker III, Charles L.
System: The UNT Digital Library