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367 Matching Results
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Design and implementation of a vacuum compatible laser-basedsub-nm resolution absolute distance measurement gauge
We describe the design and implementation of a vacuum compatible laser-based absolute distance measurement gauge with sub-nm resolution. The present system is compatible with operation in the 10{sup -8} Torr range and with some minor modifications could be used in the 10{sup -9} Torr range. The system is based on glancing incidence reflection and dual segmented diode detection. The system has been implemented as a focus sensor for extreme ultraviolet interferometry and microlithography experiments at Lawrence Berkeley National Laboratory's Advanced Light Source synchrotron radiation facility and 1{sigma} operational measurement noise floor of 0.26 nm has been demonstrated.
Date:
February 16, 2004
Creator:
Naulleau, Patrick P.; Denham, Paul E. & Rekawa, Senajith
Object Type:
Article
System:
The UNT Digital Library
A white paper describing produced water from production of crude oil, natural gas, and coal bed methane.
One of the key missions of the U.S. Department of Energy (DOE) is to ensure an abundant and affordable energy supply for the nation. As part of the process of producing oil and natural gas, operators also must manage large quantities of water that are found in the same underground formations. The quantity of this water, known as produced water, generated each year is so large that it represents a significant component in the cost of producing oil and gas. Produced water is water trapped in underground formations that is brought to the surface along with oil or gas. It is by far the largest volume byproduct or waste stream associated with oil and gas production. Management of produced water presents challenges and costs to operators. This white paper is intended to provide basic information on many aspects of produced water, including its constituents, how much of it is generated, how it is managed and regulated in different settings, and the cost of its management.
Date:
February 16, 2004
Creator:
Veil, J. A.; Puder, M. G.; Elcock, D. & Redweik, R. J., Jr.
Object Type:
Report
System:
The UNT Digital Library
FISCAL YEAR 2001 ANNUAL REPORT ON THE UNIVERSITY PROGRAMS OF THE ADVANCED ACCELERATOR APPLICATIONS PROGRAM.
The Advanced Accelerator Applications (AAA) Program was initiated in fiscal year 2001 (FY-01) by the U.S. Congress, the U.S. Department of Energy (DOE), and the Los Alamos National Laboratory (LANL) in partnership with other national laboratories. The AAA Project and the R&D for its underlying science and technology will require a large cadre of educated scientists and trained technicians in the future. In addition, other applications of nuclear science and engineering (e.g., proliferation monitoring and defense, nuclear medicine, safety regulation, industrial processes, and many others) require increased academic and national infrastructure and student populations. Thus, the DOE AAA Program Office has begun a multi-year program to involve university faculty and students in various phases of the Project to support the infrastructure requirements of nuclear energy, science and technology fields as well as the special needs of the DOE transmutation program. Herein I summarize the goals and accomplishments of the university programs that have supported the AAA Project during FY-01, including the involvement of more than eighty students.
Date:
February 16, 2002
Creator:
BELLER, DENIS E
Object Type:
Report
System:
The UNT Digital Library
Atmospheric Dispersion Modeling for Radiological Accident Analyses at LANL Nuclear Facilities.
None
Date:
February 16, 2002
Creator:
Heindel, George D.
Object Type:
Report
System:
The UNT Digital Library
RADIATION LITMUS PAPER
None
Date:
February 16, 2002
Creator:
WARNER, BENJAMIN P; JOHNS, DEIDRE M; D'ALESSIO, JOSEPH A & SHEAFE, KIMBERLY S
Object Type:
Article
System:
The UNT Digital Library
STATISTICAL DAMAGE CLASSIFICATION USING SEQUENTIAL PROBABILITY RATIO TESTS.
The primary objective of damage detection is to ascertain with confidence if damage is present or not within a structure of interest. In this study, a damage classification problem is cast in the context of the statistical pattern recognition paradigm. First, a time prediction model, called an autoregressive and autoregressive with exogenous inputs (AR-ARX) model, is fit to a vibration signal measured during a normal operating condition of the structure. When a new time signal is recorded from an unknown state of the system, the prediction errors are computed for the new data set using the time prediction model. When the structure undergoes structural degradation, it is expected that the prediction errors will increase for the damage case. Based on this premise, a damage classifier is constructed using a sequential hypothesis testing technique called the sequential probability ratio test (SPRT). The SPRT is one form of parametric statistical inference tests, and the adoption of the SPRT to damage detection problems can improve the early identification of conditions that could lead to performance degradation and safety concerns. The sequential test assumes a probability distribution of the sample data sets, and a Gaussian distribution of the sample data sets is often used. …
Date:
February 16, 2002
Creator:
SOHN, HOON; ALLEN, DAVID W; WORDEN, KEITH & FARRAR, CHARLES R
Object Type:
Report
System:
The UNT Digital Library
High Pressure XENON Gamma-Ray Spectrometers for Field Use
This project explored a new concept for high-pressure xenon ionization chambers by replacing the Frisch grid with coplanar grid electrodes similar to those used in wide bandgap semiconductor gamma-ray spectrometers. This work is the first attempt to apply the coplanar grid anode design in a gas ionization chamber in order to achieve to improved energy resolution. Three prototype detectors, two cylindrical and one parallel plate configurations, were built and tested. While the detectors did not demonstrate energy resolutions as good as other high pressure xenon gamma-ray spectrometers, the results demonstrated that the concept of single polarity charge sending using coplanar grid electrodes will work in a gas detector.
Date:
February 16, 2004
Creator:
Wehe, David K.; He, Zong & Knoll, Glenn K.
Object Type:
Report
System:
The UNT Digital Library
Peak Ground Velocities for Seismic Events at Yucca Mountain, Nevada
This report describes a scientific analysis to bound credible horizontal peak ground velocities (PGV) for the repository waste emplacement level at Yucca Mountain. Results are presented as a probability distribution for horizontal PGV to represent uncertainties in the analysis. The analysis also combines the bound to horizontal PGV with results of ground motion site-response modeling (BSC 2004 [DIRS 170027]) to develop a composite hazard curve for horizontal PGV at the waste emplacement level. This result provides input to an abstraction of seismic consequences (BSC 2004 [DIRS 169183]). The seismic consequence abstraction, in turn, defines the input data and computational algorithms for the seismic scenario class of the total system performance assessment (TSPA). Planning for the analysis is documented in Technical Work Plan TWP-MGR-GS-000001 (BSC 2004 [DIRS 171850]). The bound on horizontal PGV at the repository waste emplacement level developed in this analysis complements ground motions developed on the basis of PSHA results. In the PSHA, ground motion experts characterized the epistemic uncertainty and aleatory variability in their ground motion interpretations. To characterize the aleatory variability they used unbounded lognormal distributions. As a consequence of these characterizations, as seismic hazard calculations are extended to lower and lower annual frequencies of being …
Date:
February 16, 2005
Creator:
Coppersmith, K. & Quittmeyer, R.
Object Type:
Report
System:
The UNT Digital Library
Q-List
The purpose of this report is to document the safety classification of the Yucca Mountain repository structures, systems, and components (SSCs) that are important to safety and to document the identification of natural and engineered barriers and other SSCs important to waste isolation, as described in ''Safety Classification of SSCs and Barriers'' (BSC 2005, Attachment A). This report supports the design and licensing activities for the Yucca Mountain Project.
Date:
February 16, 2005
Creator:
Ziegler, J. A.
Object Type:
Report
System:
The UNT Digital Library
Environmental Management Performance Report for December 1999
The purpose of the Environmental Management Performance Report (EMPR) is to provide the Department of Energy Richland Operations Office's (DOE-RL's) report of Hanford's Environmental Management (EM) performance by: U. S. Department of Energy, Richland Operations Office, Project Hanford Management Contract (PHMC) through Fluor Hanford, Inc. (FHI) and its subcontractors, Environmental Restoration Contract through Bechtel Hanford, Inc. (BHI), and its subcontractors, and Pacific Northwest National Laboratories (PNNL) for EM and EM Science and Technology (S&T) Mission. This report is a monthly publication that summarizes EM Site performance under RL Operations Office. It is organized by the four sections listed above, with each section containing an Executive Summary and Area Performance Summaries. A listing of what is contained in the sections can be found in the Table of Contents.
Date:
February 16, 2000
Creator:
EDER, D.M.
Object Type:
Report
System:
The UNT Digital Library
Generic Test Plan for Solubility Screening Tests of Hanford Tank Waste
Waste pretreatment and immobilization requires the tank waste to be retrieved. Retrieval from tanks may require dilution. This test determines the effects of dilution on the mass of solids and their composition. This test plan gives test instructions, example data sheets, a waste compatibility review, and a waste stream fact sheet.
Date:
February 16, 2000
Creator:
PERSON, J.C.
Object Type:
Report
System:
The UNT Digital Library
Comparison of Variability of the Monthly Mean Temperature of the ECMWF and NCEP Reanalyses and CCM3 and DSM Simulations
The low frequency variation in the three dimensional air temperature fields of two reanalyses and two model simulations are described. The data sets used are the monthly mean temperature fields for the NCAR Climate Simulation Model (CSM, Boville and Gent, 1998) 300 year run, a NCAR Community Climate Model version 3 (CCM3, Kiehl et al., 1998) AMIP type simulation, and the NCEPLNCAR and ECMWF (ERA) reanalysis data sets. The variances and correlations are computed for the anomalies from the annual cycle for each data set. In general the reanalyses and models agree fairly well on the structure of the temperature variance. The models tend to have too much variance at the surface compared to the reanalyses. The CSM's poor simulation of the SST in the eastern Pacific leads to a much reduced variance in the Nino3 region. The enhanced variability over land appears to affect the midlatitude simulation of the CSM in that the higher surface variability extends off the east coast of continents. This is not evident in CCM3 and reanalyses where the SSTs are prescribed. At 200 hPa the CCM3 and reanalyses all evince the dumb bell pattern straddling the Equator in the eastern Pacific attributed by Yulaeva …
Date:
February 16, 2000
Creator:
Boyle, J.S.
Object Type:
Report
System:
The UNT Digital Library
Texas Register, Volume 26, Number 7, Pages 1433-1610, February 16, 2001
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
February 16, 2001
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Federal Procurement: Trends and Challenges in Contracting With Women-Owned Small Businesses
A letter report issued by the General Accounting Office with an abstract that begins "Procurement regulations implemented in 1996 mandated that women-owned small businesses (WOSB) receive five percent of governmentwide contracts. Although the number of contracts awarded to WOSBs has risen more than four times as fast as other federal contracting efforts since 1996, the goal of awarding five percent of federal contracts to WOSBs has not been met. More agencies succeeded in meeting the WOSB subcontracting goal than their prime contracting goal. GAO found that three federal agencies--the Department of Veterans Affairs, the Department of State, and the National Aeronautics and Space Administration--met or exceeded both goals in three of the four years it studied. Because the Department of Defense, which accounted for 64 percent of federal procurement in 1999, did not come close to achieving its five-percent goal, the governmentwide goal for prime contracting with WOSBs could not have been met even if all other federal agencies reached their prime contracting goals. Government officials cited many obstacles to increasing federal contracting with WOSBs, including a reduced contracting personnel force and the absense of a targeted WOSB government program. These contracting officers offered suggestions for increasing WOSB participation in …
Date:
February 16, 2001
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
The Sachse News (Sachse, Tex.), Vol. 2, No. 3, Ed. 1 Thursday, February 16, 2006
Weekly newspaper from Sachse, Texas that includes local, state and national news along with advertising.
Date:
February 16, 2006
Creator:
Fisher, Donnita Nesbit
Object Type:
Newspaper
System:
The Portal to Texas History
Simple shearing flow of dry soap foams with TCP structure[Tetrahedrally Close-Packed]
The microrheology of dry soap foams subjected to large, quasistatic, simple shearing deformations is analyzed. Two different monodisperse foams with tetrahedrally close-packed (TCP) structure are examined: Weaire-Phelan (A15) and Friauf-Laves (C15). The elastic-plastic response is evaluated by calculating foam structures that minimize total surface area at each value of strain. The minimal surfaces are computed with the Surface Evolver program developed by Brakke. The foam geometry and macroscopic stress are piecewise continuous functions of strain. The stress scales as T/V{sup 1/3} where T is surface tension and V is cell volume. Each discontinuity corresponds to large changes in foam geometry and topology that restore equilibrium to unstable configurations that violate Plateau's laws. The instabilities occur when the length of an edge on a polyhedral foam cell vanishes. The length can tend to zero smoothly or abruptly with strain. The abrupt case occurs when a small increase in strain changes the energy profile in the neighborhood of a foam structure from a local minimum to a saddle point, which can lead to symmetry-breaking bifurcations. In general, the new foam topology associated with each stable solution branch results from a cascade of local topology changes called T1 transitions. Each T1 cascade produces …
Date:
February 16, 2000
Creator:
Reinelt, Douglas A. & Kraynik, Andrew M.
Object Type:
Article
System:
The UNT Digital Library
The Archer Advocate (Holliday, Tex.), Vol. 2, No. 46, Ed. 1 Wednesday, February 16, 2005
Weekly newspaper from Holliday, Texas that includes local, state, and national news along with advertising.
Date:
February 16, 2005
Creator:
Thomas, John
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 89, No. 47, Ed. 1 Monday, February 16, 2009
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 16, 2009
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 88, No. 47, Ed. 1 Saturday, February 16, 2008
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 16, 2008
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 86, No. 82, Ed. 1 Friday, February 16, 2007
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 16, 2007
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 85, No. 69, Ed. 1 Thursday, February 16, 2006
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 16, 2006
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Levelland and Hockley County News-Press (Levelland, Tex.), Vol. 25, No. 92, Ed. 1 Sunday, February 16, 2003
Semiweekly newspaper from Levelland, Texas that includes local, state, and national news along with advertising.
Date:
February 16, 2003
Creator:
Rigg, John
Object Type:
Newspaper
System:
The Portal to Texas History
15th Street News (Midwest City, Okla.), Vol. 30, No. 16, Ed. 1 Friday, February 16, 2001
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
February 16, 2001
Creator:
Baldwin, Alisha
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 36, No. 17, Ed. 1 Friday, February 16, 2007
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
February 16, 2007
Creator:
Ray, Johnna
Object Type:
Newspaper
System:
The Gateway to Oklahoma History