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1,571 Matching Results
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[Children surround firefighter at ILD event, closeup]
Photograph of a group of children surrounding a firefighter during an Instructional Leadership Development (ILD) event hosted by UNT's Center for Public Service. Children can be seen standing in a circle around the firefighter, who is crouched down in a protective suit and mask. One young boy is touching the mask with his left hand.
Date:
March 2001
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
Chiral Extrapolation of Lattice Moments of Proton Quark Distributions
The behavior of the first three nontrivial moments of the nonsinglet quark distribution u - d in the proton is studied as a function of quark mass in order to guide the extrapolation of lattice QCD calculations to the physical region. We propose a simple extrapolation formula, embodying the general constraints of the chiral symmetry of QCD, which provides an excellent fit to the lattice data and the experimental values for each moment.
Date:
March 1, 2001
Creator:
W. Detnold, W. Melnitchouk, et. Al.
Object Type:
Article
System:
The UNT Digital Library
The Christian Chronicle (Oklahoma City, Okla.), Vol. 58, No. 3, Ed. 1, March 2001
Monthly newspaper from Oklahoma City, Oklahoma that includes news and information about the Churches of Christ along with advertising.
Date:
March 2001
Creator:
McBride, Bailey & LaMascus, R. Scott
Object Type:
Newspaper
System:
The Portal to Texas History
Church & Synagogue Libraries, Volume 34, Number 5, March/April 2001
Bimonthly publication of the Church and Synagogue Library Association, containing news and events related to the organization and its members, reviews of books and other materials, and stories of interest to the management of congregational libraries.
Date:
March 2001
Creator:
Church and Synagogue Library Association
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
The Clean Air Act and Renewable Energy: Opportunities, Barriers, and Options
This paper examines the opportunities, obstacles, and potential options to promote renewable energy under the CAA and related programs. It deals, in sequence, with the regulation of SO2, NOx, regional haze/particulate matter, and CO2. For each pollutant, the paper discusses the opportunities, barriers, and options for boosting renewables under the CAA. It concludes by comparing the options discussed. The paper is based on a project on environmental regulation and renewable energy in electricity generation conducted by the National Renewable Energy Laboratory for the Office of Power Technologies, Office of Energy Efficiency and Renewable Energy, US Department of Energy.
Date:
March 1, 2001
Creator:
Wooley, D.R. (Young, Sommer, Ward, Ritzenberg, Wooley, Baker and Moore, LLC); Morss, E.M. (Young, Sommer, Ward, Ritzenberg, Wooley, Baker and Moore, LLC) & Fang, J.M. (National Renewable Energy Laboratory)
Object Type:
Article
System:
The UNT Digital Library
[Clipping: "Bosnia-deployed Soldiers Enjoy 'Taste of Tuzla'"]
"Section C" of the March 2001 issue of The Frontline. Article about soldiers' deployment in Bosnia, Emory Bennett's earning of the Purple Heart, Medieval Times, and more are included.
Date:
March 1, 2001
Creator:
unknown
Object Type:
Clipping
System:
The Portal to Texas History
[Clipping: "Stewart Team Takes 1st in GRPA Tourney 92-61"]
"Section B" of the March 2001 issue of The Frontline. Articles about the Fort Stewart men's basketball team's participation in the Georgia Recreation and Parks Association tournament, the Wolverine-South Invitational Golf Tournament being held in the Hunter Golf Club, a fitness coordinator's advice for "getting into shape" over the summer.
Date:
March 1, 2001
Creator:
unknown
Object Type:
Clipping
System:
The Portal to Texas History
Closure Report for Corrective Action Unit 240: Area 25 Vehicle Washdown Nevada Test Site, Nevada
The Area 25 Vehicle Washdown, Corrective Action Unit (CAU) 240, was clean-closed following the approved Corrective Action Decision Document closure alternative and in accordance with the Federal Facility Agreement and Consent Order (FFACO, 1996). The CAU consists of thee Corrective Action Sites (CASs): 25-07-01 - Vehicle Washdown Area (Propellant Pad); 25-07-02 - Vehicle Washdown Area (F and J Roads Pad); and 25-07-03 - Vehicle Washdown Station (RADSAFE Pad). Characterization activities indicated that only CAS 25-07-02 (F and J Roads Pad) contained constituents of concern (COCs) above action levels and required remediation. The COCs detected were Total Petroleum Hydrocarbons (TPH) as diesel, cesium-137, and strontium-90. The F and J Roads Pad may have been used for the decontamination of vehicles and possibly disassembled engine and reactor parts from Test Cell C. Activities occurred there during the 1960s through early 1970s. The F and J Roads Pad consisted of a 9- by 5-meter (m) (30- by 15-foot [ft]) concrete pad and a 14- by 13-m (46-by 43-ft) gravel sump. The clean-closure corrective action consisted of excavation, disposal, verification sampling, backfilling, and regrading. Closure activities began on August 21, 2000, and ended on September 19, 2000. Waste disposal activities were completed on December …
Date:
March 1, 2001
Creator:
Gustafason, D. L.
Object Type:
Report
System:
The UNT Digital Library
CLOUD CHEMISTRY.
Clouds present substantial concentrations of liquid-phase water, which can potentially serve as a medium for dissolution and reaction of atmospheric gases. The important precursors of acid deposition, SO{sub 2} and nitrogen oxides NO and NO{sub 2} are only sparingly soluble in clouds without further oxidation to sulfuric and nitric acids. In the case of SO{sub 2} aqueous-phase reaction with hydrogen peroxide, and to lesser extent ozone, are identified as important processes leading to this oxidation, and methods have been described by which to evaluate the rates of these reactions. The limited solubility of the nitrogen oxides precludes significant aqueous-phase reaction of these species, but gas-phase reactions in clouds can be important especially at night.
Date:
March 2001
Creator:
Schwartz, S. E.
Object Type:
Book
System:
The UNT Digital Library
Cold X-Ray Impulse Estimates
The purpose of this short note is to document comparisons between a simple analytic model and the BUCKL[1]x-ray deposition and impulse code and to briefly demonstrate the effect of deposition time on impulse.
Date:
March 1, 2001
Creator:
DiPeso, G.
Object Type:
Report
System:
The UNT Digital Library
The Colony Courier-Leader (The Colony, Tex.), Vol. 20, No. 3, Ed. 1 Thursday, March 1, 2001
Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date:
March 1, 2001
Creator:
Reeves, Tim
Object Type:
Newspaper
System:
The Portal to Texas History
THE COLOR DIPOLE APPROACH TO THE DRELL-YAN PROCESS IN PA COLLISIONS
In the target rest frame and at high energies, Drell-Yan (DY) dilepton production looks like bremsstrahlung of massive photons, rather than parton annihilation. The projectile quark is decomposed into a series of Fock states. Configurations with fixed transverse separations are interaction eigenstates for pp scattering. The DY cross section can then be expressed in terms of the same color dipole cross section as DIS. This approach is especially suitable to describe nuclear effects, since it allows to apply Glauber multiple scattering theory. We go beyond the Glauber eikonal approximation by taking into account transitions between interaction eigenstates. We calculate nuclear shadowing at large Feynman-x{sub f} for DY in proton-nucleus collisions, compare to existing data from E772 and make predictions for RHIC. Nuclear effects on the transverse momentum distribution are also investigated.
Date:
March 1, 2001
Creator:
KOPELIOVICH, B. & AL, ET
Object Type:
Article
System:
The UNT Digital Library
Comanche Chief (Comanche, Tex.), No. 43, Ed. 1 Thursday, March 1, 2001
Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date:
March 1, 2001
Creator:
Wilkerson, James C., III
Object Type:
Newspaper
System:
The Portal to Texas History
A COMPARISON OF FOUR METHODS FOR DETERMINING PRECIPITABLE WATER VAPOR CONTENT FROM MULTI-SPECTRAL DATA
Determining columnar water vapor is a fundamental problem in remote sensing. This measurement is important both for understanding atmospheric variability and also from removing atmospheric effects from remotely sensed data. Therefore discovering a reliable and if possible automated method for determining water vapor column abundance is important. There are two standard methods for determining precipitable water vapor during the daytime from multi-spectral data. The first method is the Continuum Interpolated Band Ratio (CIBR) (see for example King et al. 1996). This method assumes a baseline and measures the depth of a water vapor feature as compared to this baseline. The second method is the Atmospheric Pre-corrected Differential Absorption technique (APDA) (see Schlaepfer et al. 1998); this method accounts for the path radiance contribution to the top of atmosphere radiance measurement which is increasingly important at lower and lower reflectance values. We have also developed two methods of modifying CIBR. We use a simple curve fitting procedure to account for and remove any systematic errors due to low reflectance while still preserving the random spread of the CIBR values as a function of surface reflectance. We also have developed a two-dimensional look-up table for CIBR; CIBR using this technique is a …
Date:
March 1, 2001
Creator:
HIRSCH, K. & AL, ET
Object Type:
Article
System:
The UNT Digital Library
COMPARISON OF MONTE CARLO METHODS FOR NONLINEAR RADIATION TRANSPORT
Five Monte Carlo methods for solving the nonlinear thermal radiation transport equations are compared. The methods include the well-known Implicit Monte Carlo method (IMC) developed by Fleck and Cummings, an alternative to IMC developed by Carter and Forest, an ''exact'' method recently developed by Ahrens and Larsen, and two methods recently proposed by Martin and Brown. The five Monte Carlo methods are developed and applied to the radiation transport equation in a medium assuming local thermodynamic equilibrium. Conservation of energy is derived and used to define appropriate material energy update equations for each of the methods. Details of the Monte Carlo implementation are presented, both for the random walk simulation and the material energy update. Simulation results for all five methods are obtained for two infinite medium test problems and a 1-D test problem, all of which have analytical solutions. Conclusions regarding the relative merits of the various schemes are presented.
Date:
March 1, 2001
Creator:
MARTIN, W. R. & BROWN, F. B.
Object Type:
Article
System:
The UNT Digital Library
COMPREHENSIVE STRUCTURAL STUDY OF PRE-AND POST-HEAT TREATED COMPRESSION MOLDED POLYURETHANE SAMPLES OF VARYING COMPOSITION STUDIES BY SCANNING PROBE TECHNIQUES
Only a limited number of structural studies have been performed on polyurethanes using scanning probe techniques to determine both the microstructure and the corresponding distribution of hard and soft segments within samples. This type of information is needed to better understand the mechanical properties of these materials and to facilitate modeling. In order to address these issues, we have fabricated a series of compression molded segmented poly(ester urethane) samples with hard (HS) to soft segment ratios from 19 to 100%. Samples were examined using scanning probe phase imaging techniques to obtain the topography and corresponding distribution of hard domains before and after heating at 100 C. A number of significant differences were observed between the pre- and post-heat treated samples. Variations in structure and heat-induced morphological changes were directly related to HS content. Fine strand- or fibril-like structures were most prominent in the 23 and 19% HS sample but first appeared at 30% HS. Harder, thicker elongated structures dominated the surface of the 100% HS sample and were seen to a limited extent on all samples, especially after annealing and quenching. The 23% HS sample surface structure depended on quenching rate and time after treatment.
Date:
March 1, 2001
Creator:
HAWLEY, M.; ORLER, E. & AL, ET
Object Type:
Article
System:
The UNT Digital Library
A Computer code to measure the Beam Emittance and Beam Parameters of the ATR Line
N/A
Date:
March 1, 2001
Creator:
N., Tsoupas; Glenn, W.; Tepikian, S.; MacKay, W. & Ahrens, L.
Object Type:
Report
System:
The UNT Digital Library
Computer Simulation of Bubble Growth in Metals Due to He
Atomistic simulations of the growth of helium bubbles in metals are performed. The metal is represented by embedded atom method potentials for palladium. The helium bubbles are treated via an expanding repulsive spherical potential within the metal lattice. The simulations predict bubble pressures that decrease monotonically with increasing helium to metal ratios. The swelling of the material associated with the bubble growth is also computed. It is found that the rate of swelling increases with increasing helium to metal ratio consistent with experimental observations on the swelling of metal tritides. Finally, the detailed defect structure due to the bubble growth was investigated. Dislocation networks are observed to form that connect the bubbles. Unlike early model assumptions, prismatic loops between the bubbles are not retained. These predictions are compared to available experimental evidence.
Date:
March 1, 2001
Creator:
FOILES, STEPHEN M. & HOYT, JEFFREY J.
Object Type:
Report
System:
The UNT Digital Library
The Confederated Tribes of the Warm Springs Indian Reservation of Oregon John Day Basin Office: FY 1999 Watershed Restoration Projects : Annual Report 1999.
The John Day River is the second longest free-flowing river in the contiguous United States and one of the few major subbasins in the Columbia River basin containing entirely unsupplemented runs of anadromous fish. Located in eastern Oregon, the basin drains over 8,000 square miles, the fourth largest drainage area in Oregon. With its beginning in the Strawberry Mountains near the town of Prairie City, the John Day flows 284 miles in a northwesterly direction, entering the Columbia River approximately four miles upstream of the John Day dam. With wild runs of spring chinook salmon and summer steelhead, red band, westslope cutthroat, and redband trout, the John Day system is truly one of national significance. The entire John Day basin was granted to the Federal government in 1855 by the Confederated Tribes of the Warm Springs Reservation of Oregon (Tribes). In 1997, the Tribes established an office in the basin to coordinate restoration projects, monitoring, planning and other watershed activities on private and public lands. Once established, the John Day Basin Office (JDBO) initiated contracting the majority of its construction implementation actions with the Grant Soil and Water Conservation District (GSWCD), also located in the town of John Day. The …
Date:
March 1, 2001
Creator:
Robertson, Shawn W.
Object Type:
Report
System:
The UNT Digital Library
The Confederated Tribes of the Warm Springs Indian Reservation of Oregon John Day Basin Office : Watershed Restoration Projects : Annual Report, 2000.
The John Day is the second longest free-flowing river in the contiguous United States and the longest containing entirely unsupplemented runs of anadromous fish. Located in eastern Oregon, the basin drains over 8,000 square miles--Oregon's third largest drainage basin--and incorporates portions of eleven counties. Originating in the Strawberry Mountains near Prairie City, the John Day River flows 284 miles in a northwesterly direction, entering the Columbia River approximately four miles upstream of the John Day dam. With wild runs of spring Chinook salmon and summer steelhead, red band, westslope cutthroat, and redband trout, the John Day system is truly a basin with national significance. Most all of the entire John Day basin was ceded to the Federal government in 1855 by the Confederated Tribes of the Warm Springs Reservation of Oregon (Tribes). In 1997, the Tribes established an office in the Basin to coordinate restoration projects, monitoring, planning and other watershed activities on private and public lands. Using funding from the Bonneville Power Administration, Bureau of Reclamation, and others, the John Day Basin Office (JDBO) subcontracts the majority of its construction implementation activities with the Grant Soil and Water Conservation District (GSWCD), also located in the town of John Day. …
Date:
March 1, 2001
Creator:
Office., Confederated Tribes of the Warm Springs Reservation of Oregon. John Day Basin
Object Type:
Report
System:
The UNT Digital Library
Configuration Manual Polarized Proton Collider at RHIC
In this report, the authors present their design to accelerate and store polarized protons in RHIC, with the level of polarization, luminosity, and control of systematic errors required by the approved RHIC spin physics program. They provide an overview of the physics to be studied using RHIC with polarized proton beams, and a brief description of the accelerator systems required for the project.
Date:
March 1, 2001
Creator:
Roser, T.; MacKay, W. W.; Alekseev, I.; Bai, M.; Brown, K.; Bunce, G. et al.
Object Type:
Report
System:
The UNT Digital Library
Creased-Plastic Rock Permeameter for Hydrogeology Students
This article discusses the use of creased-plastic permeameters as an inexpensive way for students to estimate the hydraulic conductivity of local rock aquifers.
Date:
March 2001
Creator:
Hudak, Paul F.
Object Type:
Article
System:
The UNT Digital Library
Cycle Life Studies of Advanced Technology Development Program Gen 1 Lithium Ion Batteries
This report presents the test results of a special calendar-life test conducted on 18650-size, prototype, lithium-ion battery cells developed to establish a baseline chemistry and performance for the Advanced Technology Development Program. As part of electrical performance testing, a new calendar-life test protocol was used. The test consisted of a once-per-day discharge and charge pulse designed to have minimal impact on the cell yet establish the performance of the cell over a period of time such that the calendar life of the cell could be determined. The calendar life test matrix included two states of charge (i.e., 60 and 80%) and four temperatures (40, 50, 60, and 70°C). Discharge and regen resistances were calculated from the test data. Results indicate that both discharge and regen resistance increased nonlinearly as a function of the test time. The magnitude of the discharge and regen resistance depended on the temperature and state of charge at which the test was conducted. The calculated discharge and regen resistances were then used to develop empirical models that may be useful to predict the calendar life or the cells.
Date:
March 1, 2001
Creator:
Wright, Randy Ben & Motloch, Chester George
Object Type:
Report
System:
The UNT Digital Library
Daily Journal (Perry, Okla.), Vol. 108, No. 43, Ed. 1 Thursday, March 1, 2001
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 1, 2001
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History