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257,005 Matching Results

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Best Match Title Creator Date Created (Newest) Date Created (Oldest) Date Added (Newest) Date Added (Oldest)
International Workshop on Approaches for Upscaling Processes Affecting Radionuclide Transport through the Subsurface (open access)

International Workshop on Approaches for Upscaling Processes Affecting Radionuclide Transport through the Subsurface

None
Date: August 28, 2000
Creator: ALTMAN,SUSAN J.
Object Type: Article
System: The UNT Digital Library
A Numerical Feasibility Study of Three-Component Induction Logging for Three Dimensional Imaging About a Single Borehole (open access)

A Numerical Feasibility Study of Three-Component Induction Logging for Three Dimensional Imaging About a Single Borehole

A theoretical analysis has been completed for a proposed induction logging tool designed to yield data which are used to generate three dimensional images of the region surrounding a well bore. The proposed tool consists of three mutually orthogonal magnetic dipole sources and multiple 3 component magnetic field receivers offset at different distances from the source. The initial study employs sensitivity functions which are derived by applying the Born Approximation to the integral equation that governs the magnetic fields generated by a magnetic dipole source located within an inhomogeneous medium. The analysis has shown that the standard coaxial configuration, where the magnetic moments of both the source and the receiver are aligned with the axis of the well bore, offers the greatest depth of sensitivity away from the borehole compared to any other source-receiver combination. In addition this configuration offers the best signal-to-noise characteristics. Due to the cylindrically symmetric nature of the tool sensitivity about the borehole, the data generated by this configuration can only be interpreted in terms of a two-dimensional cylindrical model. For a fill 3D interpretation the two radial components of the magnetic field that are orthogonal to each other must be measured. Coil configurations where both …
Date: August 1, 1999
Creator: ALUMBAUGH, DAVID L. & WILT, MICHAEL J.
Object Type: Report
System: The UNT Digital Library
A PREDICTIVE MODEL OF NUCLEON-NUCLEUS SCATTERING CROSS SECTIONS (open access)

A PREDICTIVE MODEL OF NUCLEON-NUCLEUS SCATTERING CROSS SECTIONS

None
Date: August 1, 2001
Creator: AMOS, K.; DEB, P. & KARATAGLIDIS, S.
Object Type: Article
System: The UNT Digital Library
WasteWater Treatment And Heavy Metals Removal In The A-01 Constructed Wetland 2003 Report (open access)

WasteWater Treatment And Heavy Metals Removal In The A-01 Constructed Wetland 2003 Report

The A-01 wetland treatment system (WTS) was designed to remove metals from the effluent at the A-01 NPDES outfall. The purpose of research conducted during 2003 was to evaluate (1) the ability of the A-01 wetland treatment system to remediate waste water, (2) retention of the removed contaminants in wetland sediment, and (3) the potential remobilization of these contaminants from the sediment into the water column. Surface water and sediment samples were collected and analyzed in this study.
Date: August 1, 2004
Creator: ANNA, KNOX
Object Type: Report
System: The UNT Digital Library
[Photograph 2012.201.B0174.0444]

[Photograph 2012.201.B0174.0444]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Edmond High School Principal Charles Woodham talks about the new Auditorium and Performing Arts Center being built onto the northeast side of the high school."
Date: August 16, 1995
Creator: AP Leaf
Object Type: Photograph
System: The Gateway to Oklahoma History
An Archaeological Survey of Proposed Water Pipeline Route Improvements and Deep Well Location for the Cross Country Water Supply Corporation (open access)

An Archaeological Survey of Proposed Water Pipeline Route Improvements and Deep Well Location for the Cross Country Water Supply Corporation

Archaeological survey results of proposed water pipeline improvements for the Cross County Water Supply Corporation in McLennen and Bosque County, Texas.
Date: August 6, 2007
Creator: AR Consultants
Object Type: Report
System: The Portal to Texas History
Parametric Study for Large Wind Turbine Blades: WindPACT Blade System Design Studies (open access)

Parametric Study for Large Wind Turbine Blades: WindPACT Blade System Design Studies

This report presents the results of a study of various wind turbine blade design parameters as a function of blade length in the range from 30 meters to 70 meters. The results have been summarized in dimensional and non-dimensional formats to aid in interpretation. The parametric review estimated peak power and annual energy capture for megawatt scale wind turbines with rotors of 62, 83, 104, 125, and 146 meters in diameter. The baseline ''thin'' distribution represents conventional airfoils used in large wind turbine blades. The ''thicker'' and ''thickest'' distributions utilize airfoils that have significantly increased thickness to improve structural performance and reduce weight. An aerodynamic scaling effort was undertaken in parallel with the structural analysis work to evaluate the effect of extreme thickness on aerodynamic characteristics. Increased airfoil section thickness appears to be a key tool in limiting blade weight and cost growth with scale. Thickened and truncated trailing edges in the inboard region provide strong, positive effects on blade structural performance. Larger blades may require higher tip speeds combined with reduced blade solidity to limit growth of design loads. A slender blade can be used to reduce extreme design loads when the rotor is parked, but requires a higher …
Date: August 1, 2002
Creator: ASHWILL, THOMAS D.
Object Type: Report
System: The UNT Digital Library
[Press Release: ATAC Washington, D.C.] (open access)

[Press Release: ATAC Washington, D.C.]

A press release from the AIDS Treatment Activist Conference promoting their second annual conference taking place in Washington, D.C.
Date: August 16, 1991
Creator: ATAC
Object Type: Text
System: The UNT Digital Library
Power Technologies Energy Data Book - Fourth Edition (open access)

Power Technologies Energy Data Book - Fourth Edition

This report, prepared by NREL's Strategic Energy Analysis Center, includes up-to-date information on power technologies, including complete technology profiles. The data book also contains charts on electricity restructuring, power technology forecasts, electricity supply, electricity capability, electricity generation, electricity demand, prices, economic indicators, environmental indicators, and conversion factors.
Date: August 1, 2006
Creator: Aabakken, J.
Object Type: Report
System: The UNT Digital Library
Impacts of uranium-utilization improvements on light water reactor radionuclide releases (open access)

Impacts of uranium-utilization improvements on light water reactor radionuclide releases

This report discusses potential changes to radionuclide releases as a result of uranium-saving plant modifications and altered operating practices. Only releases to the environment from routine operation are considered; releases resulting from abnormal conditions outside the technical specifications covering plant operation are not considered.
Date: August 1981
Creator: Aaberg, R. L.
Object Type: Report
System: The UNT Digital Library
Search for the Higgs boson in the all-hadronic final state using the full CDF data set (open access)

Search for the Higgs boson in the all-hadronic final state using the full CDF data set

None
Date: August 1, 2012
Creator: Aaltonen, T. & Phys., /Helsinki U. /Helsinki Inst. of
Object Type: Article
System: The UNT Digital Library
First Run II Measurement of the W Boson Mass (open access)

First Run II Measurement of the W Boson Mass

We describe a measurement of the W boson mass m{sub W} using 200 pb{sup -1} of {radical}s = 1.96 TeV p{bar p} collision data taken with the CDF II detector. With a sample of 63,964 W {yields} e{nu} candidates and 51,128 W {yields} {mu}{nu} candidates, we measure m{sub W} = [80.413 {+-} 0.034(stat.) {+-} 0.034 (sys.) = 80.413 {+-} 0.048] GeV/c{sup 2}. This is the single most precise m{sub W} measurement to date. When combined with other measured electroweak parameters, this result further constrains the properties of new unobserved particles coupling to W and Z bosons.
Date: August 1, 2007
Creator: Aaltonen, T.; Abulencia, A.; Adelman, J.; Akimoto, T.; Albrow, Michael G.; Alvarez Gonzalez, B. et al.
Object Type: Article
System: The UNT Digital Library
First Direct Bound on the Total Width of the Top Quark in p anti-p Collisions at s88(1/2) = 1.96-TeV (open access)

First Direct Bound on the Total Width of the Top Quark in p anti-p Collisions at s88(1/2) = 1.96-TeV

None
Date: August 1, 2008
Creator: Aaltonen, T.; Phys., /Helsinki Inst. of; Adelman, J.; /Chicago U., EFI; Akimoto, T.; U., /Tsukuba et al.
Object Type: Article
System: The UNT Digital Library
Measurement of d sigma/dy of Drell-Yan e+ e- pairs in the Z Mass Region from p anti-p Collisions at s88(1/2) = 1.96-TeV (open access)

Measurement of d sigma/dy of Drell-Yan e+ e- pairs in the Z Mass Region from p anti-p Collisions at s88(1/2) = 1.96-TeV

We report on a CDF measurement of the total cross section and rapidity distribution, d{sigma}/dy, for q{bar q} {yields} {gamma}*/Z {yields} e{sup +}e{sup -} events in the Z boson mass region (66 < M{sub ee} < 116 GeV/c{sup 2}) produced in p{bar p} collisions at {radical}s = 1.96 TeV with 2.1 fb{sup -1} of integrated luminosity. The measured cross section of 256 {+-} 16 pb and d{sigma}/dy distribution are compared with Next-to-Leading-Order and Next-to-Next-to-Leading-Order QCD theory predictions with CTEQ and MRST parton distribution functions (PDFs). There is good agreement between data and theory except at large rapidity for which further tuning of PDF models may be needed.
Date: August 1, 2009
Creator: Aaltonen, T.; Phys., /Helsinki Inst. of; Adelman, J.; /Chicago U., EFI; Akimoto, T.; U., /Tsukuba et al.
Object Type: Article
System: The UNT Digital Library
Search for Doubly Charged Higgs Bosons with Lepton-Flavor-Violating Decays involving Tau Leptons (open access)

Search for Doubly Charged Higgs Bosons with Lepton-Flavor-Violating Decays involving Tau Leptons

None
Date: August 1, 2008
Creator: Aaltonen, T.; Phys., /Helsinki Inst. of; Adelman, J.; /Chicago U., EFI; Akimoto, T.; U., /Tsukuba et al.
Object Type: Article
System: The UNT Digital Library
Search for Supersymmetry in p anti-p Collisions at s**(1/2) = 1.96-TeV Using the Trilepton Signature of Chargino-Neutralino Production (open access)

Search for Supersymmetry in p anti-p Collisions at s**(1/2) = 1.96-TeV Using the Trilepton Signature of Chargino-Neutralino Production

None
Date: August 1, 2008
Creator: Aaltonen, T.; Phys., /Helsinki Inst. of; Adelman, J.; /Chicago U., EFI; Akimoto, T.; U., /Tsukuba et al.
Object Type: Article
System: The UNT Digital Library
A Search for the Higgs Boson Produced in Association with $Z\to \ell^+\ell^-$ Using the Matrix Element Method at CDF II (open access)

A Search for the Higgs Boson Produced in Association with $Z\to \ell^+\ell^-$ Using the Matrix Element Method at CDF II

We present a search for associated production of the standard model (SM) Higgs boson and a Z boson where the Z boson decays to two leptons and the Higgs decays to a pair of b quarks in p{bar p} collisions at the Fermilab Tevatron. We use event probabilities based on SM matrix elements to construct a likelihood function of the Higgs content of the data sample. In a CDF data sample corresponding to an integrated luminosity of 2.7 fb{sup -1} we see no evidence of a Higgs boson with a mass between 100 GeV/c{sup 2} and 150 GeV/c{sup 2}. We set 95% confidence level (C.L.) upper limits on the cross-section for ZH production as a function of the Higgs boson mass m{sub H}; the limit is 8.2 times the SM prediction at m{sub H} = 115 GeV/c{sup 2}.
Date: August 1, 2009
Creator: Aaltonen, T.; Phys., /Helsinki Inst. of; Adelman, J.; /Chicago U., EFI; Akimoto, T.; U., /Tsukuba et al.
Object Type: Article
System: The UNT Digital Library
A Direct Top-Quark Width Measurement from Lepton + Jets Events at CDF II (open access)

A Direct Top-Quark Width Measurement from Lepton + Jets Events at CDF II

We present a measurement of the top-quark width using t{bar t} events produced in p{bar p} collisions at Fermilab's Tevatron collider and collected by the CDF II detector. In the mode where the top quark decays to a W boson and a bottom quark, we select events in which one W decays leptonically and the other hadronically (lepton + jets channel) . From a data sample corresponding to 4.3 fb{sup -1} of integrated luminosity, we identify 756 candidate events. The top-quark mass and the mass of W boson that decays hadronically are reconstructed for each event and compared with templates of different top-quark widths ({Lambda}{sub t}) and deviations from nominal jet energy scale ({Delta}{sub JES}) to perform a simultaneous fit for both parameters, where {Delta}{sub JES} is used for the in situ calibration of the jet energy scale. By applying a Feldman-Cousins approach, we establish an upper limit at 95% confidence level (CL) of {Lambda}{sub t} < 7.6 GeV and a two-sided 68% CL interval of 0.3 GeV < {Lambda}{sub t} < 4.4 GeV for a top-quark mass of 172.5 GeV/c{sup 2}, which are consistant with the standard model prediction. This is the first direct measurement of {Lambda}{sub t} to …
Date: August 1, 2010
Creator: Aaltonen, T.; Phys., /Helsinki Inst. of; Alvarez Gonzalez, B.; Phys., /Oviedo U. /Cantabria Inst. of; Amerio, S.; /INFN, Padua et al.
Object Type: Article
System: The UNT Digital Library
Measurement of the $WW+WZ$ Production Cross Section Using a Matrix Element Technique in Lepton + Jets Events (open access)

Measurement of the $WW+WZ$ Production Cross Section Using a Matrix Element Technique in Lepton + Jets Events

We present a measurement of the WW + WZ production cross section observed in a final state consisting of an identified electron or muon, two jets, and missing transverse energy. The measurement is carried out in a data sample corresponding to up to 4.6 fb{sup -1} of integrated luminosity at {radical}s = 1.96 TeV collected by the CDF II detector. Matrix element calculations are used to separate the diboson signal from the large backgrounds. The WW + WZ cross section is measured to be 17.4 {+-} 3.3 pb, in agreement with standard model predictions. A fit to the dijet invariant mass spectrum yields a compatible cross section measurement.
Date: August 1, 2010
Creator: Aaltonen, T.; Phys., /Helsinki Inst. of; Alvarez Gonzalez, B.; Phys., /Oviedo U. /Cantabria Inst. of; Amerio, S.; /INFN, Padua et al.
Object Type: Article
System: The UNT Digital Library
Updated Search for the Flavor-Changing Neutral-Current Decay $D^0 \to \mu^+ \mu^-$ (open access)

Updated Search for the Flavor-Changing Neutral-Current Decay $D^0 \to \mu^+ \mu^-$

We report on a search for the flavor-changing neutral-current decay D{sup 0} {yields} {mu}{sup +}{mu}{sup -} in p{bar p} collisions at {radical}s = 1.96TeV using 360 pb{sup -1} of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. A displaced vertex trigger selects long-lived D{sup 0} candidates in the {mu}{sup +}{mu}{sup -}, {pi}{sup +}{pi}{sup -}, and K{sup -}{pi}{sup +} decay modes. We use the Cabibbo-favored D{sup 0} {yields} K{sup -}{pi}{sup +} channel to optimize the selection criteria in an unbiased manner, and the kinematically similar D{sup 0} {yields} {pi}{sup +}{pi}{sup -} channel for normalization. We set an upper limit on the branching fraction {Beta}(D{sup 0} {yields} {mu}{sup +}{mu}{sup -}) < 2.1 x 10{sup -7} (3.0 x 10{sup -7}) at the 90% (95%) confidence level.
Date: August 1, 2010
Creator: Aaltonen, T.; Phys., /Helsinki Inst. of; Alvarez Gonzalez, B.; Phys., /Oviedo U. /Cantabria Inst. of; Amerio, S.; /INFN, Padua et al.
Object Type: Article
System: The UNT Digital Library
Plasma-Enhanced SCR of NOx in Simulated Heavy-Duty Exhaust: Sulfur, Hydrocarbon, and Temperature Effects (open access)

Plasma-Enhanced SCR of NOx in Simulated Heavy-Duty Exhaust: Sulfur, Hydrocarbon, and Temperature Effects

None
Date: August 20, 2000
Creator: Aardahl, C. L.
Object Type: Article
System: The UNT Digital Library
Heavy-Duty Emissions Control: Plasma-Facilitated vs Reformer-Assisted Lean NOx Catalysis (open access)

Heavy-Duty Emissions Control: Plasma-Facilitated vs Reformer-Assisted Lean NOx Catalysis

Progress has been made in the control of combustion processes to limit the formation of environmentally harmful species, but lean burn vehicles, such as those powered by diesel engines used for the majority of commercial trucking and off-road applications, remain a major source of nitrogen oxides (NOx) and particulate matter (PM) emissions. Tighter control of the combustion process coupled with exhaust gas recirculation has brought emissions in line with 2004 targets worldwide. Additional modifications to the engine control system, somewhat limited NOx control, and PM filters will likely allow the 2007 limits to be met for the on-highway regulations for heavy-duty engines in the United States. Concern arises when the NOx emission limit of 0.2 g/bhphr set for the year 2010 is considered.
Date: August 24, 2003
Creator: Aardahl, C. L.; Rozmiarek, R. T.; Rappe, K. G.; Mendoza, D. P. & Park, P. W.
Object Type: Article
System: The UNT Digital Library
The Effects of Raising Grandchildren on the Marital Satisfaction, Life Satisfaction, and Parenting Stress of Grandparents (open access)

The Effects of Raising Grandchildren on the Marital Satisfaction, Life Satisfaction, and Parenting Stress of Grandparents

This study examined the relationship among the variables of marital satisfaction, life satisfaction, and parenting stress of grandparents raising grandchildren and whether the sources and levels of marital satisfaction, life satisfaction, and parenting stress differed among grandparents raising grandchildren and grandparents not raising grandchildren.
Date: August 1992
Creator: Aaron, Larry M. (Larry Marion)
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Oak Ridge Isotope Products and Services - Current and Expected Supply and Demand (open access)

Oak Ridge Isotope Products and Services - Current and Expected Supply and Demand

Oak Ridge National Laboratory (ORNL) has been a major center of isotope production research, development, and distribution for over 50 years. Currently, the major isotope production activities include (1) the production of transuranium element radioisotopes, including 252 Cf; (2) the production of medical and industrial radioisotopes; (3) maintenance and expansion of the capabilities for production of enriched stable isotopes; and, (4) preparation of a wide range of custom-order chemical and physical forms of isotope products, particularly in accelerator physics research. The recent supply of and demand for isotope products and services in these areas, research and development (R&D), and the capabilities for future supply are described in more detail below. The keys to continuing the supply of these important products and services are the maintenance, improvement, and potential expansion of specialized facilities, including (1) the High Flux Isotope Reactor (HFIR), (2) the Radiochemical Engineering Development Center (REDC) and Radiochemical Development Laboratory (RDL) hot cell facilities, (3) the electromagnetic calutron mass separators and the plasma separation process equipment for isotope enrichment, and (4) the Isotope Research Materials Laboratory (IRML) equipment for preparation of specialized chemical and physical forms of isotope products. The status and plans for these ORNL isotope production facilities …
Date: August 29, 1999
Creator: Aaron, W. S.; Alexander, C. W.; Cline, R. L.; Collins, E. D.; Klein, J. A.; Knauer, J. B., Jr. et al.
Object Type: Article
System: The UNT Digital Library