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509 Matching Results
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2006 Electrochemistry Gordon Research Conference - February 12-17-2006
This report is a descriptive journey of 2006 Electrochemistry Gordon Research Conference.
Date:
April 3, 2007
Creator:
Abruna, Hector D.
Object Type:
Article
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 26, No. 14, Ed. 1 Thursday, April 3, 2008
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
April 3, 2008
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Persistent Patterns in Accretion Disks
We present a set of new characteristic frequencies associated with accretion disks around compact objects. These frequencies arise from persistent rotating patterns in the disk that are finite in radial extent and driven purely by the gravity of the central body. Their existence depends on general relativistic corrections to orbital motion and, if observed, could be used to probe the strong gravity region around a black hole. We also discuss a possible connection to the puzzle of quasi-periodic oscillations.
Date:
April 3, 2006
Creator:
Amin, Mustafa A.; Frolov, Andrei V. & /KIPAC, Menlo Park
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 107, No. 2, Ed. 1 Sunday, April 3, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 3, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Development of Proof-of-Concept Units for the Advanced Medium-Sized Mobile Power Sources (AMMPS) Program
The purpose of this report is to document the development of the proof-of-concept units within the Advanced Medium-sized Mobile Power Sources (AMMPS) program. The design used a small, lightweight diesel engine, a permanent magnet alternator, power electronics and digital controls as outlined in the philosophy detailed previously. One small proof-of-concept unit was completed and delivered to the military. The unit functioned well but was not optimized at the time of delivery to the military. A tremendous amount of experience was gained during this phase that can be used in the development of any follow-on AMMPS production systems. Lessons learned and recommendations for follow-on specifications are provided. The unit demonstrated that significant benefits are possible with the new design philosophy. Trade-offs will have to be made but many of the advantages appear to be within the technical grasp of the market.
Date:
April 3, 2002
Creator:
Andriulli, JB
Object Type:
Report
System:
The UNT Digital Library
Prevention of Reservoir Interior Discoloration
Contamination is anathema in reservoir production. Some of the contamination is a result of welding and some appears after welding but existed before. Oxygen was documented to be a major contributor to discoloration in welding. This study demonstrates that it can be controlled and that some of the informal cleaning processes contribute to contamination.
Date:
April 3, 2001
Creator:
Arnold, K. F.
Object Type:
Report
System:
The UNT Digital Library
Atmospheric Radiation Measurement Program Facilities Newsletter, March 2000
Monthly newsletter discussing news and activities related to the Atmospheric Radiation Measurement Program, articles about weather and atmospheric phenomena, and other related topics.
Date:
April 3, 2000
Creator:
Atmospheric Radiation Measurement Program (U.S.)
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Science & Technology Review May 2006
This month's issue has the following articles: (1) Science and Technology Help the Nation Counter Terrorism--Commentary by Raymond J. Juzaitis; (2) Imagers Provide Eyes to See Gamma Rays--Gamma-ray imagers provide increased radiation detection capabilities and enhance the nation's arsenal for homeland security; (3) Protecting the Nation's Livestock--Foot-and-mouth disease could devastate America's livestock; a new assay provides a rapid means to detect it; (4) Measures for Measures--Laboratory physicists combine emissivity and reflectivity to achieve highly accurate temperature measurements of metal foils; and (5) Looping through the Lamb Shift--Livermore scientists measured a small perturbation in the spectra of highly ionized uranium--the first measurement of the two-loop Lamb shift in a bound state.
Date:
April 3, 2006
Creator:
Aufderheide, M. B., III
Object Type:
Report
System:
The UNT Digital Library
Design Compliance Matrices to ANSI and OSHA
U.S. Department of Energy Letter 98-SFD-028 requested Fluor Daniel Hanford, Inc. to provide clarifications as to compliance with ANSI 57.1, 57.2, 57.9, and 29 CFR 1910.179 (OSHA), in the form of an item-by-item compliance matrix, for the CSB. This Supporting Document contains Fluor Daniel, Inc.'s response for use by Fluor Daniel Hanford, Inc. regarding the clarifications requested by the U.S. Department of Energy.
Date:
April 3, 2000
Creator:
BENDIXSEN, R.B.
Object Type:
Report
System:
The UNT Digital Library
Raman Shift of Stressed Diamond Anvils: Pressure Calibration and Culet Geometry Dependence
The pressure dependence of the Raman shift of diamond for highly stressed anvils at the diamond-anvil sample interface has been measured for different culet shapes up to 180 GPa at ambient temperature. By using hydrogen samples, which constitute both a quasi-hydrostatic medium and a sensitive pressure sensor, some of the effects of culet and tip size have been determined. We propose that the divergent results in the literature can be partly ascribed to different anvil geometries. Experiments show increasing second order dependence of the diamond Raman shift with pressure for decreasing tip size. This is an important consideration when using the diamond anvils as a pressure sensor.
Date:
April 3, 2008
Creator:
Baer, B. J.; Chang, M. E. & Evans, W. J.
Object Type:
Article
System:
The UNT Digital Library
PSLQ: An Algorithm to Discover Integer Relations
Let x = (x{sub 1}, x{sub 2} {hor_ellipsis}, x{sub n}) be a vector of real or complex numbers. x is said to possess an integer relation if there exist integers a{sub i}, not all zero, such that a{sub 1}x{sub 1} + a{sub 2}x{sub 2} + {hor_ellipsis} + a{sub n}x{sub n} = 0. By an integer relation algorithm, we mean a practical computational scheme that can recover the vector of integers ai, if it exists, or can produce bounds within which no integer relation exists. As we will see in the examples below, an integer relation algorithm can be used to recognize a computed constant in terms of a formula involving known constants, or to discover an underlying relation between quantities that can be computed to high precision. At the present time, the most effective algorithm for integer relation detection is the 'PSLQ' algorithm of mathematician-sculptor Helaman Ferguson [10, 4]. Some efficient 'multi-level' implementations of PSLQ, as well as a variant of PSLQ that is well-suited for highly parallel computer systems, are given in [4]. PSLQ constructs a sequence of integer-valued matrices B{sub n} that reduces the vector y = xB{sub n}, until either the relation is found (as one of …
Date:
April 3, 2009
Creator:
Bailey, David H. & Borwein, J. M.
Object Type:
Report
System:
The UNT Digital Library
Plug-In Hybrid Electric Vehicle Penetration Scenarios
This report examines the economic drivers, technology constraints, and market potential for plug-in hybrid electric vehicles (PHEVs) in the U.S. A PHEV is a hybrid vehicle with batteries that can be recharged by connecting to the grid and an internal combustion engine that can be activated when batteries need recharging. The report presents and examines a series of PHEV market penetration scenarios. Based on input received from technical experts and industry representative contacted for this report and data obtained through a literature review, annual market penetration rates for PHEVs are presented from 2013 through 2045 for three scenarios. Each scenario is examined and implications for PHEV development are explored.
Date:
April 3, 2008
Creator:
Balducci, Patrick J.
Object Type:
Report
System:
The UNT Digital Library
A Survey of Songs for the Flute
Presentation for the 2008 University Scholars Day at the University of North Texas disucsing a survey of songs for the flute.
Date:
April 3, 2008
Creator:
Baldwin, Rachel & Clardy, Mary Karen
Object Type:
Presentation
System:
The UNT Digital Library
The Strategic Petroleum Reserve: History, Perspectives, and Issues
None
Date:
April 3, 2006
Creator:
Bamberger, Robert L.
Object Type:
Report
System:
The UNT Digital Library
The Strategic Petroleum Reserve: History, Perspectives, and Issues
None
Date:
April 3, 2006
Creator:
Bamberger, Robert L.
Object Type:
Report
System:
The UNT Digital Library
ChaMP Serendipitous Galaxy Cluster Survey
We present a survey of serendipitous extended X-ray sources and optical cluster candidates from the Chandra Multi-wavelength Project (ChaMP). Our main goal is to make an unbiased comparison of X-ray and optical cluster detection methods. In 130 archival Chandra pointings covering 13 square degrees, we use a wavelet decomposition technique to detect 55 extended sources, of which 6 are nearby single galaxies. Our X-ray cluster catalog reaches a typical flux limit of about {approx} 10{sup -14} erg s{sup -1} cm{sup -2}, with a median cluster core radius of 21''. For 56 of the 130 X-ray fields, we use the ChaMP's deep NOAO/4m MOSAIC g', r', and i' imaging to independently detect cluster candidates using a Voronoi tessellation and percolation (VTP) method. Red-sequence filtering decreases the galaxy fore/background contamination and provides photometric redshifts to z {approx} 0.7. From the overlapping 6.1 square degree X-ray/optical imaging, we find 115 optical clusters (of which 11% are in the X-ray catalog) and 28 X-ray clusters (of which 46% are in the optical VTP catalog). The median redshift of the 13 X-ray/optical clusters is 0.41, and their median X-ray luminosity (0.5-2 keV) is L{sub X} = (2.65 {+-} 0.19) x 10{sup 43} ergs s{sup -1}. …
Date:
April 3, 2006
Creator:
Barkhouse, Wayne A.; Green, P. J.; Vikhlinin, A.; Kim, D.-W.; Perley, D.; Cameron, R. et al.
Object Type:
Report
System:
The UNT Digital Library
The Feasibility of Solar Powered Water Treatment: A Work In Progress
Poster presentation for the 2008 University Scholars Day at the University of North Texas discussing research on the feasibility of solar powered water treatment.
Date:
April 3, 2008
Creator:
Bastian, William & La Point, Thomas W., 1949-
Object Type:
Poster
System:
The UNT Digital Library
Intelligent Software Tools for Advanced Computing
Feature extraction and evaluation are two procedures common to the development of any pattern recognition application. These features are the primary pieces of information which are used to train the pattern recognition tool, whether that tool is a neural network, a fuzzy logic rulebase, or a genetic algorithm. Careful selection of the features to be used by the pattern recognition tool can significantly streamline the overall development and training of the solution for the pattern recognition application. This report summarizes the development of an integrated, computer-based software package called the Feature Extraction Toolbox (FET), which can be used for the development and deployment of solutions to generic pattern recognition problems. This toolbox integrates a number of software techniques for signal processing, feature extraction and evaluation, and pattern recognition, all under a single, user-friendly development environment. The toolbox has been developed to run on a laptop computer, so that it may be taken to a site and used to develop pattern recognition applications in the field. A prototype version of this toolbox has been completed and is currently being used for applications development on several projects in support of the Department of Energy.
Date:
April 3, 2001
Creator:
Baumgart, C.W.
Object Type:
Report
System:
The UNT Digital Library
South Texas Catholic (Corpus Christi, Tex.), Vol. 44, No. 7, Ed. 1 Friday, April 3, 2009
Semi-monthly newspaper from Corpus Christi, Texas published by the Diocese of Corpus Christi that includes news of interest to Diocese members along with advertising.
Date:
April 3, 2009
Creator:
Beaton, Paula J.
Object Type:
Newspaper
System:
The Portal to Texas History
Tuberculosis: Environmental and Individual Indicators: A Work in Progress
Poster presentation for the 2008 University Scholars Day at the University of North Texas discussing research on tuberculosis (TB) and environmental and individual indicators.
Date:
April 3, 2008
Creator:
Beatty, Justin & Oppong, Joseph R.
Object Type:
Poster
System:
The UNT Digital Library
Energy Efficiency Potential in Existing Commercial Buildings: Review of Selected Recent Studies
This report reviews six recent studies (from 2002 through 2006) by states and utilities to assess the energy saving potential in existing commercial buildings. The studies cover all or portions of California, Connecticut, Vermont, Colorado, Illinois, and the Pacific Northwest. The studies clearly reveal that lighting remains the single largest and most cost effective end use that can be reduced to save energy. Overall the study indicated that with existing technologies and costs, a reasonable range of economic savings potential in existing commercial buildings is between 10 and 20 percent of current energy use. While not a focus of the study, an additional conclusion is that implementation of commercial building monitoring and controls would also play an important role in the nation’s efforts to improve energy efficiency of existing buildings.
Date:
April 3, 2009
Creator:
Belzer, David B.
Object Type:
Report
System:
The UNT Digital Library
Preliminary Definition of Geophysical Regions in Western Eurasia
The authors present a regionalized crustal model of Western Eurasia, WEA. The model is constructed using results from published studies and maps of geological and geophysical parameters in this region, and was developed in conjunction with the updated regionalization of Middle East and North Africa by Walter et al.[2000]. As this is the first realization of the Eurasian modeling effort, they have limited themselves to only twelve broad regions. Particular attention has been given to identifying the boundaries for each region. The main use of this model will be to assist in monitoring the Comprehensive Nuclear Test Ban Treaty (CTBT). Specifically, this model will help them to calibrate and predict the travel time and amplitudes of various regional seismic phases and to locate events accurately. The model based approach allows them to readily calibrate both the seismic and the aseismic parts of western Eurasia. Each region is specified by an one-dimensional model of compressional and shear velocities, densities and layer thicknesses. Further improvements to this model will involve, but not be limited to, increasing the spatial coverage toward the east and west of Eurasia, identify sub-regions based on their distinct physical properties and the use of new and improved body …
Date:
April 3, 2000
Creator:
Bhattacharyya, J.; Walter, W. R.; Flanagan, M. P.; O'Boyle, J. & Pasyanos, M. E.
Object Type:
Report
System:
The UNT Digital Library
Joint Assessment of Renewable Energy and Water Desalination Research Center (REWDC) Program Capabilities and Facilities In Radioactive Waste Management
The primary goal of this visit was to perform a joint assessment of the Renewable Energy and Water Desalination Center's (REWDC) program in radioactive waste management. The visit represented the fourth technical and scientific interaction with Libya under the DOE/NNSA Sister Laboratory Arrangement. Specific topics addressed during the visit focused on Action Sheet P-05-5, ''Radioactive Waste Management''. The Team, comprised of Mo Bissani (Team Lead), Robert Fischer, Scott Kidd, and Jim Merrigan, consulted with REWDC management and staff. The team collected information, discussed particulars of the technical collaboration and toured the Tajura facility. The tour included the waste treatment facility, waste storage/disposal facility, research reactor facility, hot cells and analytical labs. The assessment team conducted the first phase of Task A for Action Sheet 5, which involved a joint assessment of the Radioactive Waste Management Program. The assessment included review of the facilities dedicated to the management of radioactive waste at the Tourja site, the waste management practices, proposed projects for the facility and potential impacts on waste generation and management.
Date:
April 3, 2006
Creator:
Bissani, M.; Fischer, R.; Kidd, S. & Merrigan, J.
Object Type:
Report
System:
The UNT Digital Library
The Effects of Parent Involvement in the Development of Children With Autistic Spectrum Disorders: A Work in Progress
Poster presentation for the 2008 University Scholars Day at the University of North Texas discussing research on the effects of parent involvement in the development of children with autistic spectrum disorders.
Date:
April 3, 2008
Creator:
Bonskowski, Marian & Eve, Susan Brown
Object Type:
Poster
System:
The UNT Digital Library