Rapid, Low-Cost Noble Gas Tracer Monitoring to Determine Travel Times at Recharge Operations (open access)

Rapid, Low-Cost Noble Gas Tracer Monitoring to Determine Travel Times at Recharge Operations

None
Date: February 28, 2012
Creator: Visser, A.; Singleton, M.; Hillegonds, D.; Velsko, C.; Moran, J. E. & Esser, B. K.
System: The UNT Digital Library
National Register of Historic Places Eligibility Testing of Sites 41LT172 and 41LT354 in Luminant's Kosse Mine, Limestone, Texas (open access)

National Register of Historic Places Eligibility Testing of Sites 41LT172 and 41LT354 in Luminant's Kosse Mine, Limestone, Texas

Report on the findings of an archaeological investigation of two sites at Luminant's Kosse Mine in Limestone County, Texas to determine whether they were eligible to be included on the National Register of Historic Places.
Date: February 2012
Creator: Atkins North America, Inc.
System: The Portal to Texas History
SuperB Progress Report for Physics (open access)

SuperB Progress Report for Physics

SuperB is a high luminosity e{sup +}e{sup -} collider that will be able to indirectly probe new physics at energy scales far beyond the reach of any man made accelerator planned or in existence. Just as detailed understanding of the Standard Model of particle physics was developed from stringent constraints imposed by flavour changing processes between quarks, the detailed structure of any new physics is severely constrained by flavour processes. In order to elucidate this structure it is necessary to perform a number of complementary studies of a set of golden channels. With these measurements in hand, the pattern of deviations from the Standard Model behavior can be used as a test of the structure of new physics. If new physics is found at the LHC, then the many golden measurements from SuperB will help decode the subtle nature of the new physics. However if no new particles are found at the LHC, SuperB will be able to search for new physics at energy scales up to 10-100 TeV. In either scenario, flavour physics measurements that can be made at SuperB play a pivotal role in understanding the nature of physics beyond the Standard Model. Examples for using the interplay …
Date: February 14, 2012
Creator: O'Leary, B.; Matias, J.; Ramon, M.; Pous, E.; De Fazio, F.; Palano, A. et al.
System: The UNT Digital Library
Applying graph partitioning methods in measurement-based dynamic load balancing (open access)

Applying graph partitioning methods in measurement-based dynamic load balancing

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Date: February 21, 2012
Creator: Bhatele, A; Fourestier, S; Menon, H; Kale, L V & Pellegrini, F
System: The UNT Digital Library
Fundamental Studies and Development of III-N Visible LEDs for High-Power Solid-State Lighting Applications (open access)

Fundamental Studies and Development of III-N Visible LEDs for High-Power Solid-State Lighting Applications

The goal of this program is to understand in a fundamental way the impact of strain, defects, polarization, and Stokes loss in relation to unique device structures upon the internal quantum efficiency (IQE) and efficiency droop (ED) of III-nitride (III-N) light-emitting diodes (LEDs) and to employ this understanding in the design and growth of high-efficiency LEDs capable of highly-reliable, high-current, high-power operation. This knowledge will be the basis for our advanced device epitaxial designs that lead to improved device performance. The primary approach we will employ is to exploit new scientific and engineering knowledge generated through the application of a set of unique advanced growth and characterization tools to develop new concepts in strain-, polarization-, and carrier dynamics-engineered and low-defect materials and device designs having reduced dislocations and improved carrier collection followed by efficient photon generation. We studied the effects of crystalline defect, polarizations, hole transport, electron-spillover, electron blocking layer, underlying layer below the multiplequantum- well active region, and developed high-efficiency and efficiency-droop-mitigated blue LEDs with a new LED epitaxial structures. We believe new LEDs developed in this program will make a breakthrough in the development of high-efficiency high-power visible III-N LEDs from violet to green spectral region.
Date: February 29, 2012
Creator: Dupuis, Russell
System: The UNT Digital Library
ITER TCWS Conceptual Design Chit Resolution Report (open access)

ITER TCWS Conceptual Design Chit Resolution Report

Design Chits resulted from the External Conceptual Design Review (CDR) held at Cadarache on July 21-23, 2009 (Reference [5.1.3]). Those Chits were categorized into 3 categories in accordance with the following rules: Category 1 - Chits to be resolved before proceeding with preliminary design; Category 2 - Chits to be resolved during preliminary design; and Category 3 - Chits already resolved or covered by higher category Chits such that no further action is required. Prior to the preliminary design, all the category 1 chits were resolved and the category chit 1 resolution report was approved (Reference [5.1.4]). However, as the design has been evolving, one of the category 1 chits needs to be re-addressed. The purpose of this report is to present the resolutions to one CDR Category 1 Chit (Cat 1 Chit No.5) and twenty-three CDR Category 2 Chits. The Category 2 Chit resolutions presented are listed in order from item number one to item number twenty-three.
Date: February 1, 2012
Creator: Berry, Jan
System: The UNT Digital Library
Closing Yucca Mountain: Litigation Associated with Attempts to Abandon the Planned Nuclear Waste Repository (open access)

Closing Yucca Mountain: Litigation Associated with Attempts to Abandon the Planned Nuclear Waste Repository

Passed in 1982, the Nuclear Waste Policy Act (NWPA) was an effort to establish an explicit statutory basis for the Department of Energy (DOE) to dispose of the nation's most highly radioactive nuclear waste. The Obama Administration, in conjunction with DOE, has taken three important steps directed toward terminating the Yucca Mountain project. While the result of the ongoing dispute over the legality of the attempted termination of the Yucca Mountain program remains uncertain, congressional action could have a significant impact on the fate of the Yucca Mountain facility. A number of leading House Republicans have voiced strong opposition to shutting down the Yucca Mountain facility. Consequently, the Yucca Mountain dispute will not only be contested before the NRC and the D.C. Circuit, but also in Congress.
Date: February 2, 2012
Creator: Garvey, Todd
System: The UNT Digital Library
AN ASSESSMENT OF FLYWHEEL HIGH POWER ENERGY STORAGE TECHNOLOGY FOR HYBRID VEHICLES (open access)

AN ASSESSMENT OF FLYWHEEL HIGH POWER ENERGY STORAGE TECHNOLOGY FOR HYBRID VEHICLES

An assessment has been conducted for the DOE Vehicle Technologies Program to determine the state of the art of advanced flywheel high power energy storage systems to meet hybrid vehicle needs for high power energy storage and energy/power management. Flywheel systems can be implemented with either an electrical or a mechanical powertrain. The assessment elaborates upon flywheel rotor design issues of stress, materials and aspect ratio. Twelve organizations that produce flywheel systems submitted specifications for flywheel energy storage systems to meet minimum energy and power requirements for both light-duty and heavy-duty hybrid applications of interest to DOE. The most extensive experience operating flywheel high power energy storage systems in heavy-duty and light-duty hybrid vehicles is in Europe. Recent advances in Europe in a number of vehicle racing venues and also in road car advanced evaluations are discussed. As a frame of reference, nominal weight and specific power for non-energy storage components of Toyota hybrid electric vehicles are summarized. The most effective utilization of flywheels is in providing high power while providing just enough energy storage to accomplish the power assist mission effectively. Flywheels are shown to meet or exceed the USABC power related goals (discharge power, regenerative power, specific power, …
Date: February 1, 2012
Creator: Hansen, James Gerald
System: The UNT Digital Library
Siting Study Framework and Survey Methodology for Marine and Hydrokinetic Energy Project in Offshore Southeast Florida (open access)

Siting Study Framework and Survey Methodology for Marine and Hydrokinetic Energy Project in Offshore Southeast Florida

Dehlsen Associates, LLC was awarded a grant by the United States Department of Energy (DOE) Golden Field Office for a project titled 'Siting Study Framework and Survey Methodology for Marine and Hydrokinetic Energy Project in Offshore Southeast Florida,' corresponding to DOE Grant Award Number DE-EE0002655 resulting from DOE funding Opportunity Announcement Number DE-FOA-0000069 for Topic Area 2, and it is referred to herein as 'the project.' The purpose of the project was to enhance the certainty of the survey requirements and regulatory review processes for the purpose of reducing the time, efforts, and costs associated with initial siting efforts of marine and hydrokinetic energy conversion facilities that may be proposed in the Atlantic Ocean offshore Southeast Florida. To secure early input from agencies, protocols were developed for collecting baseline geophysical information and benthic habitat data that can be used by project developers and regulators to make decisions early in the process of determining project location (i.e., the siting process) that avoid or minimize adverse impacts to sensitive marine benthic habitat. It is presumed that such an approach will help facilitate the licensing process for hydrokinetic and other ocean renewable energy projects within the study area and will assist in clarifying …
Date: February 28, 2012
Creator: Vinick, Charles; Riccobono, Antonino; Messing, Charles G.; Walker, Brian K. & Reed, John K.
System: The UNT Digital Library