The Efficient Windows Collaborative: Final Report (open access)

The Efficient Windows Collaborative: Final Report

The Efficient Windows Collaborative (EWC) is a coalition of manufacturers, component suppliers, government agencies, research institutions, and others who partner to expand the market for energy efficient window products. Funded through a cooperative agreement with the U.S. Department of Energy, the EWC provides education, communication and outreach in order to transform the residential window market to 70% energy efficient products by 2005. Implementation of the EWC is managed by the Alliance to Save Energy, with support from the University of Minnesota and Lawrence Berkeley National Laboratory.
Date: August 11, 2006
Creator: Alliance to Save Energy (U.S.)
Object Type: Report
System: The UNT Digital Library
ENGINEERING PROPERTIES OF DIPHENYL (open access)

ENGINEERING PROPERTIES OF DIPHENYL

None
Date: August 11, 1953
Creator: Anderson, K.
Object Type: Report
System: The UNT Digital Library
Development of a Robust Tri-Carbide Fueled Reactor for Multimegawatt Space Power and Propulsion Applications (open access)

Development of a Robust Tri-Carbide Fueled Reactor for Multimegawatt Space Power and Propulsion Applications

An innovative reactor core design based on advanced, mixed carbide fuels was analyzed for nuclear space power applications. Solid solution, mixed carbide fuels such as (U,Zr,Nb)c and (U,Zr, Ta)C offer great promise as an advanced high temperature fuel for space power reactors.
Date: August 11, 2004
Creator: Anghaie, Samim; Knight, Travis W.; Plancher, Johann & Gouw, Reza
Object Type: Report
System: The UNT Digital Library
Nuclear Fallout Decision Tool for First Responders (open access)

Nuclear Fallout Decision Tool for First Responders

None
Date: August 11, 2010
Creator: Archibald, E J & Buddemeier, B R
Object Type: Report
System: The UNT Digital Library
LOFT primary system small usage pressure cycle (open access)

LOFT primary system small usage pressure cycle

Basis, definition, and determination of the LOFT primary system minor primary pressurization cycle are presented. Example pressure-time plots are given which illustrate recognition of the minor primary pressurization cycle during typical plant operations.
Date: August 11, 1977
Creator: Arendts, J. G.
Object Type: Report
System: The UNT Digital Library
Search For the Highly Suppressed Decays B- -> K+ pi- pi- and B- -> K- K- pi+ (open access)

Search For the Highly Suppressed Decays B- -> K+ pi- pi- and B- -> K- K- pi+

The authors report a search for the decays B{sup -} {yields} K{sup +}{pi}{sup -}{pi}{sup -} and B{sup -} {yields} K{sup -}K{sup -}{pi}{sup +}, which are highly suppressed in the Standard Model. Using a sample of (467 {+-} 5) x 10{sup 6} B{bar B} pairs collected with the BABAR detector, they do not see any evidence of these decays and determine 90% confidence level upper limits of {Beta}(B{sup -} {yields} K{sup +}{pi}{sup -}{pi}{sup -}) < 9.5 x 10{sup -7} and {Beta}(B{sup -} {yields} K{sup -}K{sup -}{pi}{sup +}) < 1.6 x 10{sup -7} on the corresponding branching fractions, including systematic uncertainties.
Date: August 11, 2008
Creator: Aubert, Bernard; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E. et al.
Object Type: Article
System: The UNT Digital Library
Effect of interior surface finish on the break-up of commercial shaped charge liners (open access)

Effect of interior surface finish on the break-up of commercial shaped charge liners

A series of experiments aimed at understanding the influence of the liner interior surface finish on the break-up of shaped charge jets has been completed. The experiments used a standard 81-mm shaped charge design, loaded with LX-14 high explosive; incorporating high-precision copper shaped charged liners. The results indicate that a significant reduction of jet break-up time occurs between a surface finish of 99.30 microinches and 375.65 microinches. Surface finishes of 4.78, 44.54 and 99.30 microinches produced significantly better ductility and associated break-up times than the 375.65-microinch finish. The baseline production process high-precision liners were measured to have an average surface finish of 44.54 microinches. The results show that for the shaped charge warhead geometry and explosive combination investigated, some care must be taken in respect to surface finish, but that very fine surface finishes do not significantly improve the jet ductility and associated break-up times.
Date: August 11, 1999
Creator: Baker, E L & Schwartz, A J
Object Type: Article
System: The UNT Digital Library
Spin Rotation and Energy Compression in the ILC Linac-to-Ring Positron Beamline (open access)

Spin Rotation and Energy Compression in the ILC Linac-to-Ring Positron Beamline

Linac-to Ring beamline for positron beam injection into damping ring at the energy of 5 GeV is considered. The beamline performs spin rotation and energy compression of the positron beam extracted from the booster linac. The lattice includes four 90{sup o} phase-advance FODO cells with bending magnets placed between them, a solenoid, and the RF structure. An analytical treatment of the beamline is performed. Basic parameters and optimal configuration are discussed.
Date: August 11, 2006
Creator: Batygin, Y.K.
Object Type: Report
System: The UNT Digital Library
TARGET: A multi-channel digitizer chip for very-high-energy gamma-ray telescopes (open access)

TARGET: A multi-channel digitizer chip for very-high-energy gamma-ray telescopes

The next-generation very-high-energy (VHE) gamma-ray observatory, the Cherenkov Telescope Array, will feature dozens of imaging atmospheric Cherenkov telescopes (IACTs), each with thousands of pixels of photosensors. To be affordable and reliable, reading out such a mega-channel array requires event recording technology that is highly integrated and modular, with a low cost per channel. We present the design and performance of a chip targeted to this application: the TeV Array Readout with GSa/s sampling and Event Trigger (TARGET). This application-specific integrated circuit (ASIC) has 16 parallel input channels, a 4096-sample buffer for each channel, adjustable input termination, self-trigger functionality, and tight window-selected readout. We report the performance of TARGET in terms of sampling frequency, power consumption, dynamic range, current-mode gain, analog bandwidth, and cross talk. The large number of channels per chip allows a low cost per channel ($10 to $20 including front-end and back-end electronics but not including photosensors) to be achieved with a TARGET-based IACT readout system. In addition to basic performance parameters of the TARGET chip itself, we present a camera module prototype as well as a second-generation chip (TARGET 2), both of which have been produced.
Date: August 11, 2011
Creator: Bechtol, K.; Funk, S.; Okumura, A.; Ruckman, L.; Simons, A.; Tajima, H. et al.
Object Type: Article
System: The UNT Digital Library
Trip report, BMI, August 7, 1953 (open access)

Trip report, BMI, August 7, 1953

None
Date: August 11, 1953
Creator: Beckman, G. W.
Object Type: Report
System: The UNT Digital Library
Nanometer-Scale Epitaxial Strain Release in Perovskite Heterostructures Using 'SrAlOx' Sliding Buffer Layers (open access)

Nanometer-Scale Epitaxial Strain Release in Perovskite Heterostructures Using 'SrAlOx' Sliding Buffer Layers

We demonstrate the strain release of LaAlO{sub 3} epitaxial film on SrTiO{sub 3} (001) by inserting ultra-thin 'SrAlO{sub x}' buffer layers. Although SrAlO{sub x} is not a perovskite, nor stable as a single phase in bulk, epitaxy stabilizes the perovskite structure up to a thickness of 2 unit cells (uc). At a critical thickness of 3 uc of SrAlO{sub x}, the interlayer acts as a sliding buffer layer, and abruptly relieves the lattice mismatch between the LaAlO{sub 3} filmand the SrTiO{sub 3} substrate, while maintaining crystallinity. This technique may provide a general approach for strain relaxation of perovskite film far below the thermodynamic critical thickness. A central issue in heteroepitaxial filmgrowth is the inevitable difference in lattice constants between the filmand substrate. Due to this lattice mismatch, thin film are subjected to microstructural strain, which can have a significan effect on the filmproperties. This challenge is especially prominent in the rapidly developing fiel of oxide electronics, where much interest is focused on incorporating the emergent physical properties of oxides in devices. Although strain can be used to great effect to engineer unusual ground states, it is often deleterious for bulk first-orde phase transitions, which are suppressed by the strain and …
Date: August 11, 2011
Creator: Bell, Christopher
Object Type: Article
System: The UNT Digital Library
Reentrant Insulating State in Ultrathin Manganite Films (open access)

Reentrant Insulating State in Ultrathin Manganite Films

The transport and magnetic properties of La{sub 0.7}Sr{sub 0.3}MnO{sub 3} thin-films grown by pulsed laser deposition on (LaAlO{sub 3}){sub 0.3}(SrAl{sub 0.5}Ta{sub 0.5}O{sub 3}){sub 0.7} single crystal substrates have been investigated. A systematic series with various thicknesses of La{sub 0.7}Sr{sub 0.3}MnO{sub 3} was used to establish a phase diagram - which showed a clear difference compared to films grown on SrTiO{sub 3} substrates, highlighting the importance of film thickness and substrate strain. At 8 unit cells, the boundary between the metallic and insulating ground states, a second abrupt metal-insulator transition was observed at low temperatures, which could be tuned with by magnetic field, and is interpreted as a signature of electronic phase separation.
Date: August 11, 2011
Creator: Bell, Christopher
Object Type: Article
System: The UNT Digital Library
Tuning the Electron Gas at an Oxide Heterointerface via Free Surface Charges (open access)

Tuning the Electron Gas at an Oxide Heterointerface via Free Surface Charges

Oxide heterointerfaces are emerging as one of the most exciting materials systems in condensed matter science. One remarkable example is the LaAlO{sub 3}/SrTiO{sub 3} (LAO/STO) interface, a model system in which a highly mobile electron gas forms between two band insulators, exhibiting two dimensional superconductivity and unusual magnetotransport properties. An ideal tool to tune such an electron gas is the electrostatic field effect. In principle, the electrostatic field can be generated by bound charges due to polarization (as in the normal and ferroelectric field effects) or by adding excess free charge. In previous studies, a large modulation of the carrier density and mobility of the LAO/STO interface has been achieved using the normal field effect. However, little attention has been paid to the field effect generated by free charges. This issue is scarcely addressed, even in conventional semiconductor devices, since the free charges are typically not stable. Here, we demonstrate an unambiguous tuning of the LAO/STO interface conductivity via free surface charges written using conducting atomic force microscopy (AFM). The modulation of the carrier density was found to be reversible, nonvolatile and surprisingly large, {approx}3 x 10{sup 13} cm{sup -2}, comparable to the maximum modulation by the normal field effect. …
Date: August 11, 2011
Creator: Bell, Christopher
Object Type: Article
System: The UNT Digital Library
New Developments in Measurements of CP Violation (open access)

New Developments in Measurements of CP Violation

We present several alternative techniques used by the BABAR Collaboration in order to measure the Unitarity Triangle angle {gamma}. We also present the results of two searches designed to improve the measurements of sin(2{beta}) using penguin B decay modes by reducing the hadronic corrections uncertainties.
Date: August 11, 2006
Creator: Benelli, Gabriele
Object Type: Article
System: The UNT Digital Library
One-Loop Multi-Parton Amplitudes with a Vector Boson for the LHC (open access)

One-Loop Multi-Parton Amplitudes with a Vector Boson for the LHC

In this talk, we present the first, numerically stable, results for the one-loop amplitudes needed for computing W; Z + 3 jet cross sections at the LHC to next-to-leading order in the QCD coupling. We implemented these processes in BlackHat, an automated program based on on-shell methods. These methods scale very well with increasing numbers of external partons, and are applicable to a wide variety of problems of phenomenological interest at the LHC.
Date: August 11, 2008
Creator: Berger, C.F.; /MIT, LNS; Bern, Z.; /UCLA; Dixon, L.J.; /SLAC et al.
Object Type: Article
System: The UNT Digital Library
Hanford Site Environmental Surveillance Data Report for Calendar Year 2008 (open access)

Hanford Site Environmental Surveillance Data Report for Calendar Year 2008

Environmental surveillance on and around the Hanford Site, located in southeastern Washington State, is conducted by the Pacific Northwest National Laboratory, which is operated by Battelle for the U.S. Department of Energy. The environmental surveillance data collected for this report provide a historical record of radionuclide and radiation levels attributable to natural causes, worldwide fallout, and Hanford Site operations. Data were also collected to monitor several chemicals and metals in Columbia River water, sediment, and wildlife. These data are included in this appendix. This report is the first of two appendices that support "Hanford Site Environmental Report for Calendar Year 2008" (PNNL-18427), which describes the Hanford Site mission and activities, general environmental features, radiological and chemical releases from operations, status of compliance with environmental regulations, status of programs to accomplish compliance, Hanford Site cleanup and remediation efforts, and environmental monitoring activities and results.
Date: August 11, 2009
Creator: Bisping, Lynn E.
Object Type: Report
System: The UNT Digital Library
Canister storage building compliance assessment SNF project NRC equivalency criteria - HNF-SD-SNF-DB-003 (open access)

Canister storage building compliance assessment SNF project NRC equivalency criteria - HNF-SD-SNF-DB-003

This document presents the Project's position on compliance with the SNF Project NRC Equivalency Criteria--HNF-SD-SNF-DE-003, Spent Nuclear Fuel Project Path Forward Additional NRC Requirements. No non-compliances are shown The compliance statements have been reviewed and approved by DOE. Open items are scheduled to be closed prior to project completion.
Date: August 11, 1999
Creator: Black, D. M.
Object Type: Report
System: The UNT Digital Library
Characterization of Atomic and Electronic Structures of Electrochemically Active SOFC Cathode Surfaces (open access)

Characterization of Atomic and Electronic Structures of Electrochemically Active SOFC Cathode Surfaces

The objective of this project is to gain a fundamental understanding of the oxygen-reduction mechanism on mixed conducting cathode materials by means of quantum-chemical calculations coupled with direct experimental measurements, such as vibrational spectroscopy. We have made progress in the elucidation of the mechanisms of oxygen reduction of perovkite-type cathode materials for SOFCs using these quantum chemical calculations. We established computational framework for predicting properties such as oxygen diffusivity and reaction rate constants for adsorption, incorporation, and TPB reactions, and formulated predictions for LSM- and LSC-based cathode materials. We have also further developed Raman spectroscopy as well as SERS as a characterization tool for SOFC cathode materials. Raman spectroscopy was used to detect chemical changes in the cathode from operation conditions, and SERS was used to probe for pertinent adsorbed species in oxygen reduction. However, much work on the subject of unraveling oxygen reduction for SOFC cathodes remains to be done.
Date: August 11, 2009
Creator: Blinn, Kevin; Choi, Yongman & Liu, Meilin
Object Type: Report
System: The UNT Digital Library
Numerical Algorithms for Two-Dimensional Dry Granular Flow with Deformable Elastic Grain (open access)

Numerical Algorithms for Two-Dimensional Dry Granular Flow with Deformable Elastic Grain

The authors consider the dynamics of interacting elastic disks in the plane. This is an experimentally realizable two-dimensional model of dry granular flow where the stresses can be visualized using the photoelastic effect. As the elastic disks move in a vacuum, they interact through collisions with each other and with the surrounding geometry. Because of the finite propagation speed of deformations inside each grain it can be difficult to capture computationally even simple experiments involving just a few interacting grains. The goal of this project is to improve our ability to simulate dense granular flow in complex geometry. They begin this process by reviewing some past work, how they can improve upon previous work. the focus of this project is on capturing the elastic dynamics of each grain in an approximate, computationally tractable, model that can be coupled to a molecular dynamics scheme.
Date: August 11, 2005
Creator: Boateng, H. A.; Elander, V.; Jin, C.; Li, Y.; Vasquez, P. & Fast, P.
Object Type: Report
System: The UNT Digital Library
Role of Cell Cycle Regulation and MLH1, A Key DNA Mismatch Repair Protein, In Adaptive Survival Responses. Final Report (open access)

Role of Cell Cycle Regulation and MLH1, A Key DNA Mismatch Repair Protein, In Adaptive Survival Responses. Final Report

Due to several interesting findings on both adaptive survival responses (ASRs) and DNA mismatch repair (MMR), this grant was separated into two discrete Specific Aim sets (each with their own discrete hypotheses). The described experiments were simultaneously performed.
Date: August 11, 1999
Creator: Boothman, David A.
Object Type: Report
System: The UNT Digital Library
Magnetic properties and crystal structure of RENiA1 and UniA1 hydrides. (open access)

Magnetic properties and crystal structure of RENiA1 and UniA1 hydrides.

RENiAl (RE = rare-earth metal) and UNiAl compounds crystallizing in the hexagonal ZrNiAl-type structure (space group P{bar 6}2m) can absorb up to 2 and 3 hydrogen (deuterium) atoms per formula unit, respectively. Hydrogenation leads to a notable lattice expansion and modification of magnetic properties. However, the impact of hydrogenation on magnetism is the opposite for 4f- and 5f-materials: TN(T{sub c})is lowered in the case of rare-earth hydrides, while for UNiAlH(D){sub x} it increases by an order of magnitude. Here we present results of magnetic and structure studies performed of these compounds, focusing on the correlation between magnetic and structural variations and discussing possible reasons of the striking difference in effect of hydrogenation on rare-earth and actinide intermetallics.
Date: August 11, 1999
Creator: Bordallo, H. N.; Drulis, H.; Havela, L.; Iwasieczko, W.; Kolomiets, A. V.; Nakotte, H. et al.
Object Type: Article
System: The UNT Digital Library
Characterization of Pu colloidal and aqueous species in Yucca Mountain groundwater surrogate (open access)

Characterization of Pu colloidal and aqueous species in Yucca Mountain groundwater surrogate

The speciation and formation of Pu intrinsic colloids from an initial solution of Pu(V) were studied at pH 1, pH 3, pH 6, pIH 8, and pH 11. The medium was a surrogate Yucca Mountain groundwater from well J-l 3 under air atmosphere. The solutions were monitored for several months. Samples were analyzed using liquid scintillation counting, ultra filtration, solvent extraction: photon correlation spectroscopy, and laser-induced photo-acoustic breakdown and emission spectroscopy. Redox potentials were measured periodically. The time dependencies of soluble and colloidal Pu concentrations are reported. The size and concentration of Pu colloid particles were estimated.
Date: August 11, 1999
Creator: Bourcier, W. L.; Brachmann, A.; Jardine, L. J.; Palmer, C. E.; Romanovski, V. V. & Shaw, H. F.
Object Type: Article
System: The UNT Digital Library
Lessons Learned from the Puerto Rico Battery Energy Storage System (open access)

Lessons Learned from the Puerto Rico Battery Energy Storage System

The Puerto Rico Electric Power Authority (PREPA) installed a battery energy storage system in 1994 at a substation near San Juan, Puerto Rico. It was patterned after two other large energy storage systems operated by electric utilities in California and Germany. The Puerto Rico facility is presently the largest operating battery storage system in the world and has successfully provided frequency control, voltage regulation, and spinning reseme to the Caribbean island. The system further proved its usefulness to the PREPA network in the fall of 1998 in the aftermath of Hurricane Georges. However, the facility has suffered accelerated cell failures in the past year and PREPA is committed to restoring the plant to full capacity. This represents the first repowering of a large utility battery facility. PREPA and its vendors and contractors learned many valuable lessons during all phases of project development and operation, which are summarized in this paper.
Date: August 11, 1999
Creator: Boyes, John D.; De Anda, Mindi Farber & Torres, Wenceslao
Object Type: Article
System: The UNT Digital Library
Laser-induced breakdown system for colloid characterization in dilute aqueous suspensions (open access)

Laser-induced breakdown system for colloid characterization in dilute aqueous suspensions

Detection and sizing of colloids by acoustic detection of laser-induced breakdown and elemental analysis of colloids by laser-induced breakdown spectroscopy are investigated in dilute aqueous suspensions. Development and testing of the methods are performed with standard polystyrene suspensions and prepared suspensions of defined composition and particle size. Application of the methods to analysis of field and laboratory samples is discussed. Am atomic emission lines are observed by laser-induced breakdown spectroscopy of an Am hydroxycarbonate suspension.
Date: August 11, 1999
Creator: Brachmann, A.; Mihardja, S.; Palmer, C. E. A. & Wruck, D. A.
Object Type: Article
System: The UNT Digital Library