Diagnostic Analysis of Silicon Photovoltaic Modules after 20--Year Field Exposure (open access)

Diagnostic Analysis of Silicon Photovoltaic Modules after 20--Year Field Exposure

None
Date: September 25, 2000
Creator: Quintana, M. A.; King, D. L.; Hosking, F. M.; Kratochvil, J. A.; Johnson, R. W.; Hansen, B. R. et al.
Object Type: Article
System: The UNT Digital Library
A New Linear Inductive Voltage Adder Driver for the Saturn Accelerator (open access)

A New Linear Inductive Voltage Adder Driver for the Saturn Accelerator

None
Date: September 25, 2000
Creator: Mazarakis, Michael G.; Spielman, Rick B.; Struve, Kenneth W. & Long, Finis W.
Object Type: Article
System: The UNT Digital Library
Program for Plasma-Based Concepts for Future High Energy Accelerators (open access)

Program for Plasma-Based Concepts for Future High Energy Accelerators

OAK B204 Program for Plasma-Based Concepts for Future High Energy Accelerators. The progress made under this program in the period since November 15, 2002 is reflected in this report. The main activities for this period were to conduct the first run of the E-164 high-gradient wakefield experiment at SLAC, to prepare for run 2 and to continue our collaborative effort with CERN to model electron cloud interactions in circular accelerators. Each of these is described. Also attached to this report are papers that were prepared or appeared during this period.
Date: September 25, 2003
Creator: Katsouleas, Thomas C. & Muggli, Patric
Object Type: Report
System: The UNT Digital Library
Melter Disposal Strategic Planning Document (open access)

Melter Disposal Strategic Planning Document

This document describes the proposed strategy for disposal of spent and failed melters from the tank waste treatment plant to be built by the Office of River Protection at the Hanford site in Washington. It describes program management activities, disposal and transportation systems, leachate management, permitting, and safety authorization basis approvals needed to execute the strategy.
Date: September 25, 2000
Creator: BURBANK, D.A.
Object Type: Report
System: The UNT Digital Library
Effect of Surface Condition and Heat Treatment on Corrosion of Type 316L Stainless Steel in a Mercury Thermal Convection Loop (open access)

Effect of Surface Condition and Heat Treatment on Corrosion of Type 316L Stainless Steel in a Mercury Thermal Convection Loop

Two thermal convection loops (TCLs) fabricated from 316L stainless steel and containing mercury and a variety of 316L coupons representing variable surface conditions and heat treatments have been operated continuously for 2000 h. Surface conditions included surface ground, polished, gold-coated, chemically etched, bombarded with Fe to simulate radiation damage, and oxidized. Heat treatments included solution treated, welded, and sensitized. In addition, a nitrogen doped 316L material, termed 316LN, was also examined in the solution treated condition. Duplicate TCLs were operated in this experiment--both were operated with a 305 C peak temperature, a 65 C temperature gradient, and mercury velocity of 1.2 m/min--but only one included a 36 h soak in Hg at 310 C just prior to operation to encourage wetting. Results indicate that the soak in Hg at 310 C had no lasting effect on wetting or compatibility with Hg. Further, based on examination of post-test wetting and coupon weight loss, only the gold-coated surfaces revealed significant interaction with Hg. In areas wetted significantly by Hg, the extreme surface of the stainless steel (ca 10 {micro}m) was depleted in Ni and Cr compared to the bulk composition.
Date: September 25, 2001
Creator: Pawel, S. J.
Object Type: Report
System: The UNT Digital Library
First D-Zero jet measurements at squareroot s =1.96 TeV (open access)

First D-Zero jet measurements at squareroot s =1.96 TeV

The authors present the first Run II measurements with the D0 detector of the inclusive jet and dijet cross sections at {radical}s = 1.96 TeV. This analysis is based on an integrated luminosity of 34 pb{sup -1}. The results from a next-to-leading order perturbative QCD calculation are compared to the measured cross sections. The theoretical calculation agrees with the data.
Date: September 25, 2003
Creator: Begel, Michael
Object Type: Article
System: The UNT Digital Library
Development of a toolbox of organic synthetic reactions that can be induced on individual molecules by STM (open access)

Development of a toolbox of organic synthetic reactions that can be induced on individual molecules by STM

OAK B262 Final Report DOE Grant No.: DE-FG03-01ER15263 ''Development of a toolbox of organic synthetic reactions that can be induced on individual molecules by STM'' Abstract Bommisetty V. Rao, Ki-Young Kwon, Robert Perry, Luke Nysen, Gregory Pavin, Qibin Zhang, Casey Dugger and Ludwig Bartels University of California at Riverside, Pierce Hall, Riverside, CA92521, email: Ludwig.Bartels@ucr.edu The key scientific objective of this project is the development of a set of reliable techniques for the addressal of specific bonds of individual molecules in order to assemble functional molecules on a metal surface at single-atom precision. Success in this direction will open up a conceptually novel route to single molecule chemistry, which can provide its products at any desired surface location without involving any lithographic steps at all. In the course of this project a number of halo-substituted aryls and alkyls where investigated with special concern to two properties: clean deposition of the reactants from the gas phase on metallic surfaces and STM-based addressability of individual substituents of them. In order to prevent contamination of the sample by deposition of solvent residue, a special depositions source was developed that uses a skimmed molecular beam. Exemplary substances studied were 1,3-iodobromobenzene (IBB), 3 bromopropionitrile (BPN) …
Date: September 25, 2003
Creator: Bartels, Ludwig
Object Type: Report
System: The UNT Digital Library
Optimizing the Grinding Process for Ceramic Materials (open access)

Optimizing the Grinding Process for Ceramic Materials

None
Date: September 25, 2001
Creator: McSpadden, SB
Object Type: Report
System: The UNT Digital Library
Charged current disappearance measurements in the NuMI off-axis beam (open access)

Charged current disappearance measurements in the NuMI off-axis beam

This article studies the potential of combining charged-current disappearance measurements of {nu}{sub {mu}} {yields} {nu}{sub {tau}} from MINOS and an off-axis beam. The author finds that the error on {Delta}m{sup 2} from a 100 kt-yr off-axis measurement is a few percent of itself. Further, the author found little improvement to an off-axis measurement by combining it with MINOS.
Date: September 25, 2003
Creator: Bernstein, R. H.
Object Type: Article
System: The UNT Digital Library
The second moment of the pion light cone wave function (open access)

The second moment of the pion light cone wave function

We present a preliminary result for second moment of the light cone wave function of the pion. This parameter is the subject of a discrepancy between theoretical predictions (coming from lattice and sum rules) and a recent experimental result (that remarkably agrees with purely perturbative predictions). In this work we exploit lattice hypercubic symmetries to remove power divergences and, moreover, implement a full 1-loop matching for all the contributing operators.
Date: September 25, 2003
Creator: Debbio, Luigi del; Pierro, Massimo di & Dougall, Alex
Object Type: Article
System: The UNT Digital Library
First observation of doubly charmed baryons (open access)

First observation of doubly charmed baryons

The SELEX experiment (E781) at Fermilab has observed two statistically compelling high mass states near 3.6 GeV/c{sup 2}, decaying to {Lambda}{sub c}{sup +} K{sup -} {pi}{sup +} and {Lambda}{sub c}{sup +} K{sup -} {pi}{sup +}{pi}{sup +}. These final states are Cabibbo-allowed decay modes of doubly charmed baryons {Xi}{sub cc}{sup +} and {Xi}{sub cc}{sup ++}, respectively. The masses are in the range expected from theoretical considerations, but the spectroscopy is surprising. SELEX also has weaker preliminary evidence for a state near 3.8 GeV/c{sup 2}, a high mass state decaying to {Lambda}{sub c}{sup +} K{sup -} {pi}{sup +}{pi}{sup +}, possibly an excited {Xi}{sub cc}{sup ++} (ccu*). Data are presented and discussed.
Date: September 25, 2003
Creator: al., M. A. Moinester et
Object Type: Article
System: The UNT Digital Library
Configuration Data Management (CDM) on a Shoestring Identifying and Utilizing an Existing Configuration and Data Management Infrastructure (open access)

Configuration Data Management (CDM) on a Shoestring Identifying and Utilizing an Existing Configuration and Data Management Infrastructure

The spreading need for and use of configuration and data management (CDM) standards has highlighted a number of challenges to the companies that need to implement those standards. For companies and organizations that are new to CDM or have limited CDM capabilities, one of the major dilemmas faced is identifying how and where to start. In many cases there is a need to contend with a legacy of poorly identified items and information and an immature or non-existent CDM infrastructure (processes, procedures, people, and information systems). To the company management and CDM professional this poses a seemingly insurmountable task of putting in place a CDM infrastructure that provides the needed benefits while keeping within an acceptable cost and schedule. This paper deals with initially establishing the CDM infrastructure using the tools that a company already has available. The paper identifies features of common software applications that can be used to implement CDM principles.
Date: September 25, 2000
Creator: Vann, J. M.
Object Type: Report
System: The UNT Digital Library
FFTF Authorization Agreement (open access)

FFTF Authorization Agreement

The purpose of the Authorization Agreement is to serve as a mechanism whereby the U.S. Department of Energy, Richland Operations Office (RL) and Fluor Hanford (FH) jointly clarify and agree to key conditions for conducting work safely and efficiently in the Fast Flux Test Facility (FFTF). Work must be accomplished in a manner that achieves high levels of quality while protecting the environment and the safety and health of workers and the public, and complying with applicable contractual and regulatory requirements. It is the intent of this Agreement to address those items of significant importance in establishing and supporting the FFTF Authorization Envelope, but this Agreement in no way alters the terms and conditions of the Project Hanford Management Contract (PHMC), Contract Number DE-AC06-96RL13200.
Date: September 25, 2000
Creator: Dautel, W. A.
Object Type: Report
System: The UNT Digital Library
Double Shell Tanks (DST) and Waste Feed Delivery Project Management Quality Affecting Procedures Management Plan (open access)

Double Shell Tanks (DST) and Waste Feed Delivery Project Management Quality Affecting Procedures Management Plan

The purpose of the Double Shell Tanks (DST) and Waste Feed Delivery (WFD) Management Assessment Plan is to define how management assessments within DST h WFD will be conducted. The plan as written currently includes only WFD Project assessment topics. Other DST and WFD group assessment topics will be added in future revisions.
Date: September 25, 2000
Creator: LUND, D.P.
Object Type: Report
System: The UNT Digital Library
Annual Progress Report on the Development of Waste Tank Leak Monitoring and Detection and Mitigation Activities in Support of M-45-08 (open access)

Annual Progress Report on the Development of Waste Tank Leak Monitoring and Detection and Mitigation Activities in Support of M-45-08

Milestone M-45-09E of the Hanford Federal Facility Agreement and Consent Order (Tri-Party Agreement or TPA) [TPA 1996] requires submittal of an annual progress report on the development of waste tank leak detection, monitoring, and mitigation (LDMM) activities associated with the retrieval of waste from single-shell tanks (SSTs). This report details progress for fiscal year 2000, building on the current LDMM strategy and including discussion of technologies, applications, cost, schedule, and technical data. The report also includes discussion of demonstrations conducted and recommendations for additional testing. Tri-Party Agreement Milestones M-45-08A and M-45-08B required design and demonstration of LDMM systems for initial retrieval of SST waste. These specific milestones have recently been deleted as part of the M-45-00A change package. Future LDMM development work has been incorporated into specific technology demonstration milestones and SST waste retrieval milestones in the M-45-03 and M-45-05 milestone series.
Date: September 25, 2000
Creator: DEFIGH PRICE, C.
Object Type: Report
System: The UNT Digital Library
Reconstruction of fundamental SUSY parameters (open access)

Reconstruction of fundamental SUSY parameters

We summarize methods and expected accuracies in determining the basic low-energy SUSY parameters from experiments at future e{sup +}e{sup -} linear colliders in the TeV energy range, combined with results from LHC. In a second step we demonstrate how, based on this set of parameters, the fundamental supersymmetric theory can be reconstructed at high scales near the grand unification or Planck scale. These analyses have been carried out for minimal supergravity [confronted with GMSB for comparison], and for a string effective theory.
Date: September 25, 2003
Creator: al., P. M. Zerwas et
Object Type: Article
System: The UNT Digital Library
Ferromagnetic Ga1-xMnxAs produced by ion implantation and pulsed laser melting (open access)

Ferromagnetic Ga1-xMnxAs produced by ion implantation and pulsed laser melting

None
Date: September 25, 2002
Creator: Scarpulla, M. A.; Dubon, O. D.; Yu, K. M.; Monteiro, O.; Pillai, M. R.; Aziz, M. J. et al.
Object Type: Article
System: The UNT Digital Library
Sfermion precision measurements at a linear collider (open access)

Sfermion precision measurements at a linear collider

At future e{sup +}e{sup -} linear colliders, the event rates and clean signals of scalar fermion production--in particular for the scalar leptons--allow very precise measurements of their masses and couplings and the determination of their quantum numbers. Various methods are proposed for extracting these parameters from the data at the sfermion thresholds and in the continuum. At the same time, NLO radiative corrections and non-zero width effects have been calculated in order to match the experimental accuracy. The substantial mixing expected for the third generation sfermions opens up additional opportunities. Techniques are presented for determining potential CP-violating phases and for extracting tan {beta} from the stau sector, in particular at high values. The consequences of possible large mass differences in the stop and sbottom system are explored in dedicated analyses.
Date: September 25, 2003
Creator: al., A. Freitas et
Object Type: Article
System: The UNT Digital Library
Oxidation Kinetics of K Basin Fuel (OCRWM) (open access)

Oxidation Kinetics of K Basin Fuel (OCRWM)

Oxidation testing of K Basin-stored N Reactor fuel in dry air, moist air, and moist helium provided reaction rate data for the Spent Nuclear Fuel Project. The tests were performed on small samples from two spent nuclear fuel elements retrieved from the closed canisters of the K West Basin. The spent nuclear fuel samples were tested using a thermogravimetric analysis system modified for moist-gas operation to allow testing in moist environments. The tests were run at constant temperature and water vapor pressure. The moist helium tests used 6.5 H a water vapor, producing seventeen data between 75 C and 210 C. Eight of these data were excluded from primary consideration due to testing anomalies and balance drift issues. Regression analysis of the nine acceptable data provided good assurance that the moist-helium results are consistent with literature data within the temperature range of 25 C to 210 C. Concerns about possible oxygen poisoning from air in-leakage and mass transfer limitations on the test data were reviewed. If oxygen poisoning occurred it was not likely to have biased the data sufficiently to change the basic conclusions of comparability to the literature data. Mass transfer limitations did not appear to have had significant …
Date: September 25, 2000
Creator: TRIMBLE, D.J.
Object Type: Report
System: The UNT Digital Library
Spent Nuclear Fuel (SNF) Project Design Verification and Validation Process (open access)

Spent Nuclear Fuel (SNF) Project Design Verification and Validation Process

This document provides a description of design verification and validation activities implemented by the Spent Nuclear Fuel (SNF) Project. During the execution of early design verification, a management assessment (Bergman, 1999) and external assessments on configuration management (Augustenburg, 1999) and testing (Loscoe, 2000) were conducted and identified potential uncertainties in the verification process. This led the SNF Chief Engineer to implement corrective actions to improve process and design products. This included Design Verification Reports (DVRs) for each subproject, validation assessments for testing, and verification of the safety function of systems and components identified in the Safety Equipment List to ensure that the design outputs were compliant with the SNF Technical Requirements. Although some activities are still in progress, the results of the DVR and associated validation assessments indicate that Project requirements for design verification are being effectively implemented. These results have been documented in subproject-specific technical documents (Table 2). Identified punch-list items are being dispositioned by the Project. As these remaining items are closed, the technical reports (Table 2) will be revised and reissued to document the results of this work.
Date: September 25, 2000
Creator: OLGUIN, L.J.
Object Type: Report
System: The UNT Digital Library
Beam tests of ionization chambers for the NuMI neutrino beam (open access)

Beam tests of ionization chambers for the NuMI neutrino beam

We have conducted tests at the Fermilab Booster of ionization chambers to be used as monitors of the NuMI neutrino beamline. The chambers were exposed to proton fluxes of up to 10{sup 12} particles/cm{sup 2}/1.56 {micro}s. We studied space charge effects which can reduce signal collection from the chambers at large charged particle beam intensities.
Date: September 25, 2003
Creator: al., Robert M. Zwaska et
Object Type: Article
System: The UNT Digital Library
INTEGRATED GEOLOGIC-ENGINEERING MODEL FOR REEF AND CARBONATE SHOAL RESERVOIRS ASSOCIATED WITH PALEOHIGHS: UPPER JURASSIC SMACKOVER FORMATION, NORTHEASTERN GULF OF MEXICO (open access)

INTEGRATED GEOLOGIC-ENGINEERING MODEL FOR REEF AND CARBONATE SHOAL RESERVOIRS ASSOCIATED WITH PALEOHIGHS: UPPER JURASSIC SMACKOVER FORMATION, NORTHEASTERN GULF OF MEXICO

The University of Alabama in cooperation with Texas A&M University, McGill University, Longleaf Energy Group, Strago Petroleum Corporation, and Paramount Petroleum Company are undertaking an integrated, interdisciplinary geoscientific and engineering research project. The project is designed to characterize and model reservoir architecture, pore systems and rock-fluid interactions at the pore to field scale in Upper Jurassic Smackover reef and carbonate shoal reservoirs associated with varying degrees of relief on pre-Mesozoic basement paleohighs in the northeastern Gulf of Mexico. The project effort includes the prediction of fluid flow in carbonate reservoirs through reservoir simulation modeling which utilizes geologic reservoir characterization and modeling and the prediction of carbonate reservoir architecture, heterogeneity and quality through seismic imaging. The primary objective of the project is to increase the profitability, producibility and efficiency of recovery of oil from existing and undiscovered Upper Jurassic fields characterized by reef and carbonate shoals associated with pre-Mesozoic basement paleohighs. The principal research effort for Year 2 of the project has been reservoir characterization, 3-D modeling and technology transfer. This effort has included six tasks: (1) the study of rockfluid interactions, (2) petrophysical and engineering characterization, (3) data integration, (4) 3-D geologic modeling, (5) 3-D reservoir simulation and (6) technology …
Date: September 25, 2002
Creator: Mancini, Ernest A.
Object Type: Report
System: The UNT Digital Library
Virus Assemblies as Templates for Nanocircuits (open access)

Virus Assemblies as Templates for Nanocircuits

Advances in nanotechnology offer significant improvements in a wide range of applications that include, light weight materials with greater strength, increased energy efficiency from electronic devices, and better sensors for a range of environmental and manufacturing uses. Furthermore, since size constraints often produce qualitative changes in the characteristics of matter, it is anticipated that the exploitation of nanotechnology will result in the identification of new phenomena and functionalities derived from the physics, chemistry, and biology of matter at the nanoscale level. However, these advances will require the development of systems for the design, modeling, and synthesis of nanoscale materials. Interestingly, many biological molecules function on this scale and possess unique properties that impart the ability to assume defined conformations and assembles, as well as interact with specific chemical or biological substrates. These traits are ideally suited for developing new models and methods for the production of novel materials at the nanoscale level. The goal of this proposal is to combine expertise in biology/protein engineering (Dr. Culver, University of Maryland Biotechnology Institute) and chemical engineering/nanophase structures (Dr. Harris, Purdue University) to develop biological macromolecules suitable for use in a variety of nanotechnologies. Specifically, this work will focus on using the well-defined …
Date: September 25, 2002
Creator: Culver, James N. & Harris, Michael T.
Object Type: Report
System: The UNT Digital Library
Gene conversion is strongly induced in human cells by double-strand breaks and is modulated by the expression of BCL-XL (open access)

Gene conversion is strongly induced in human cells by double-strand breaks and is modulated by the expression of BCL-XL

Homology-directed repair (HDR) of DNA double-strand breaks (DSBs) is a well-established mechanism that contributes to the maintenance of genomic stability in rodent cells, and it has been assumed that HDR is of similar importance in the repair of DSBs in human cells. However, in addition to promoting genomic stability, some outcomes of homologous recombination can be deleterious, suggesting that factors exist to regulate HDR. We previously demonstrated that overexpression of BCL-2 or BCL-xL enhanced the frequency of x-ray-induced mutations involving the TK1 locus, including loss of heterozygosity (LOH) events presumed to arise by mitotic recombination. The present study was designed to test whether HDR is a prominent DSB repair pathway in human cells, and to directly determine whether ectopic expression of BCL-xL affects HDR. We used the B-lymphoblastoid cell line TK6, which expresses wild-type TP53 and resembles normal lymphocytes in undergoing apoptosis following! genotoxic stress. U sing isogenic derivatives of TK6 cells (TK6-neo, TK6-bcl-xL), we find that a DSB in an integrated HDR reporter stimulates gene conversion 40-50-fold in TK6-neo cells, demonstrating that a DSB can be efficiently repaired by gene conversion in human cells. Significantly, DSB-induced gene conversion events are 3- to 4-fold more frequent in BCL-xL overexpressing cells. …
Date: September 25, 2001
Creator: Wiese, Claudia; Pierce, Andrew J.; Gauny, Stacey S.; Jasin, Maria & Kronenberg, Amy
Object Type: Article
System: The UNT Digital Library