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415 Matching Results
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Quadratic Finite Element Method for 1D Deterministic Transport
In the discrete ordinates, or SN, numerical solution of the transport equation, both the spatial ({und r}) and angular ({und {Omega}}) dependences on the angular flux {psi}{und r},{und {Omega}}are modeled discretely. While significant effort has been devoted toward improving the spatial discretization of the angular flux, we focus on improving the angular discretization of {psi}{und r},{und {Omega}}. Specifically, we employ a Petrov-Galerkin quadratic finite element approximation for the differencing of the angular variable ({mu}) in developing the one-dimensional (1D) spherical geometry S{sub N} equations. We develop an algorithm that shows faster convergence with angular resolution than conventional S{sub N} algorithms.
Date:
January 6, 2004
Creator:
Tolar, Jr., D R & Ferguson, J M
Object Type:
Article
System:
The UNT Digital Library
The Quest for Clouds and Volcanoes
Elementary students are using the internet to experience virtual field trips to learn about areas that they are not able to experience in person. This poster presentation describes a virtual field trip taken by Mendoza Elementary School, Las Vegas, Nevada classes during the summer of 2003. The authors, who are DataStreme Learning Implementation Team members, drove from Las Vegas to Seattle for the annual DataStreme Summer Workshop. During the trip and in Seattle, the authors communicated through the internet with classrooms in Las Vegas. Weather information, pictures, and pertinent information about Seattle or the enroute area were sent to the classes each day. The students then compared the weather in Las Vegas with the weather and clouds from the communication. Fourth grade students were studying about volcanoes and were excited to hear about, and see pictures of, Mt. Shasta, Mt. Lassen, Mt. St. Helen and Mt. Rainier during the virtual field trip. Classes were able to track the route taken on a map during the virtual field trip.
Date:
January 6, 2004
Creator:
Blink, F. D. & Blink, J. A.
Object Type:
Article
System:
The UNT Digital Library
Rains County Leader (Emory, Tex.), Vol. 116, No. 30, Ed. 1 Tuesday, January 6, 2004
Weekly newspaper from Emory, Texas that includes local, state, and national news along with advertising.
Date:
January 6, 2004
Creator:
Hill, Earl Clyde, Jr.
Object Type:
Newspaper
System:
The Portal to Texas History
Recent results using all point quark propagators
Pseudofermion methods for extracting all-point quark propagators are reviewed, with special emphasis on techniques for reducing or eliminating autocorrelations induced by low eigenmodes of the quark Dirac operator. Recent applications, including high statistics evaluations of hadronic current correlators and the pion form factor, are also described.
Date:
January 6, 2004
Creator:
Duncan, A. & Yoo, E. Eichten and J.
Object Type:
Article
System:
The UNT Digital Library
Salaries of Members of Congress: A List of Payable Rates and Effective Dates, 1789-2004
This report summarizes by what measures the Constitution requires Congress to determine its own pay, the annual payment adjustment procedure, changes in pay over time since 1789, and related legislation.
Date:
January 6, 2004
Creator:
Dwyer, Paul E.
Object Type:
Report
System:
The UNT Digital Library
Salaries of Members of Congress: Current Procedures and Recent Adjustments
None
Date:
January 6, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 88, No. 100, Ed. 1 Tuesday, January 6, 2004
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 6, 2004
Creator:
Broaddus, Matthew B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Sealy News (Sealy, Tex.), Vol. 117, No. 2, Ed. 1 Tuesday, January 6, 2004
Semiweekly newspaper from Sealy, Texas that includes local, state, and national news along with advertising.
Date:
January 6, 2004
Creator:
Griffin, Joanie & Horecka, Bobby
Object Type:
Newspaper
System:
The Portal to Texas History
Single Molecule Studies of Chromatin
The DNA in eukaryotic cells is tightly packaged as chromatin through interactions with histone proteins to form nucleosomes. These nucleosomes are themselves packed together through interactions with linker histone and non-histone proteins. In order for processes such as DNA replication, DNA repair, and transcription to occur, the chromatin fiber must be remodeled such that the necessary enzymes can access the DNA. The structure of the chromatin fiber beyond the level of the single nucleosome and the structural changes which accompany the remodeling process are poorly understood. We are studying the structures and forces behind the remodeling process through the use of atomic force microscopy (AFM). This allows both high-resolution imaging of the chromatin, and manipulation of individual fibers. Pulling a single chromatin fiber apart using the AFM tip yields information on the forces which hold the structure together. We have isolated chromatin fibers from chicken erythrocytes and Chinese hamster ovary cell lines. AFM images of these fibers will be presented, along with preliminary data from the manipulation of these fibers using the AFM tip. The implications of these data for the structure of chromatin undergoing the remodeling process are discussed.
Date:
January 6, 2004
Creator:
Jeans, Christopher; Colvin, M. E.; Thelen, Michael P. & Noy, A.
Object Type:
Article
System:
The UNT Digital Library
A Sketch of Supreme Court Recognition of Fifth Amendment Protection for Acts of Production
This report discusses privilege under the Court Recognition of Fifth Amendment Protection for Acts of Production. The privilege covers an individual’s actions rather than his speech or writing, yet many incriminating actions such as providing a blood sample or a handwriting sample are ordinarily not protected because they are not testimonial.
Date:
January 6, 2004
Creator:
Doyle, Charles
Object Type:
Report
System:
The UNT Digital Library
Static hybrid quarkonium potential with improved staggered quarks
The authors are studying the effects of light dynamical quarks on the excitation energies of a flux tube between a static quark and antiquark. They report preliminary results of an analysis of the ground state potential and the {Sigma}{prime}{sub g}{sup +} and II{sub u} potentials. They have measured these potentials on closely matched ensembles of gauge configurations, generated in the quenched approximation and with 2+1 flavors of Asqtad improved staggered quarks.
Date:
January 6, 2004
Creator:
Bernard, C.
Object Type:
Article
System:
The UNT Digital Library
Surface Structure and Chemical Switching of Thioctic Acid Adsorbed on Au(111) as Observed Using Near-Edge X-ray Absorption Fine Structure
Thioctic acid (alpha-lipoic acid) is a molecule with a large disulfide-containing base, a short alkyl-chain with four CH{sub 2} units, and a carboxyl termination. Self-assembled monolayer (SAM) films of thioctic acid adsorbed on Au(111) have been investigated with near-edge x-ray absorption fine structure (NEXAFS) spectroscopy and x-ray photoelectron spectroscopy (XPS) to determine film quality, bonding and morphology. Using standard preparation protocols for SAMs, that is, dissolving thioctic acid in ethanol and exposing gold to the solution, results in poor films. These films are highly disordered, contain a mixture of carboxyl and carboxylate terminations, have more than monolayer coverage, and exhibit unbound disulfide. Conversely, forming films by dissolving 1 mmol thioctic acid into 5% acetic acid in ethanol (as previously reported with carboxyl-terminated alkyl-thiols) forms ordered monolayers with small amounts of unbound sulfur. NEXAFS indicates tilted over endgroups with the carboxyl group normal on average 38{sup o} from the surface normal. Slight dichroism in other features indicates alkyl chains statistically more upright than prostrate on the surface. Reflection-absorption Fourier transform infrared (RA-FTIR) spectra indicate hydrogen bonding between neighboring molecules. In such well-formed monolayers, a stark reorientation occurs upon deprotonation of the endgroup by rinsing in a KOH solution. The carboxylate plane …
Date:
January 6, 2004
Creator:
Meulenberg, R W; van Buuren, T; Vance, A L; Terminello, L J; Willey, T M; Bostedt, C et al.
Object Type:
Article
System:
The UNT Digital Library
TDNA Monthly Office Manager's Report: December 2003
Monthly report written by the Texas Daily Newspaper Association's (TDNA's) office manager, Darla Thompson, to Phil Berkebile providing a summary of revenues and account balances, programs, meetings, and other activities in the office during the previous month.
Date:
January 6, 2004
Creator:
Thompson, Darla
Object Type:
Report
System:
The UNT Digital Library
Topological susceptibility with the improved Asqtad action
As a test of the chiral properties of the improved Asqtad (staggered fermion) action, we have been measuring the topological susceptibility as a function of quark masses for 2 + 1 dynamical flavors. We report preliminary results, which show reasonable agreement with leading order chiral perturbation theory for lattice spacing less than 0.1 fm. The total topological charge, however, shows strong persistence over Monte Carlo time.
Date:
January 6, 2004
Creator:
Bernard, C.
Object Type:
Article
System:
The UNT Digital Library
The U.S.-Central America Free Trade Agreement (CAFTA): Challenges for Sub-Regional Integration
None
Date:
January 6, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 33, No. 16, Ed. 1 Friday, February 6, 2004
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
February 6, 2004
Creator:
Pound, Jaylynn Christian
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 105, No. 279, Ed. 1 Friday, February 6, 2004
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 6, 2004
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Aviation Security: Issues Before Congress Since September 11, 2001
The events of September 11, 2001 heightened concerns regarding aviation security in the United States. The ensuing debate in Congress focused on the degree of federal involvement needed to improve aviation security and restore public confidence in air travel. The Aviation and Transportation Security Act (ATSA, P.L. 107-71, 115 Stat. 597) established the Transportation Security Administration (TSA) and contained provisions establishing a federal screener workforce and requiring screening of checked baggage using explosive detection systems. In November 2004, airports will be eligible to opt out of the federal security screening program and a provision of P.L. 107-296 preserving TSA in its present form will expire allowing DHS to restructure the TSA if it so chooses, although no such plan has been revealed to date. During the second session of the 108th Congress, oversight of TSA’s plans for implementing the security screening opt-out program will likely be of considerable interest as will any plans to restructure the TSA.
Date:
February 6, 2004
Creator:
Elias, Bartholomew
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 82, No. 66, Ed. 1 Friday, February 6, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 6, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 98, No. 11, Ed. 1 Friday, February 6, 2004
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
February 6, 2004
Creator:
Cartwright, Brian & Morgan, Clay
Object Type:
Newspaper
System:
The Portal to Texas History
Brady Standard-Herald and Heart O' Texas News (Brady, Tex.), Ed. 1 Friday, February 6, 2004
Semiweekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
February 6, 2004
Creator:
Stewart, James E.
Object Type:
Newspaper
System:
The Portal to Texas History
Chapter 12 of the U.S. Bankruptcy Code: Family Farmer Reorganization
This report discusses Family Farmer Reorganization related to chapter 12 of the U.S. bankruptcy code.
Date:
February 6, 2004
Creator:
Jeweler, Robin
Object Type:
Report
System:
The UNT Digital Library
The Clifton Record (Clifton, Tex.), Vol. 109, No. 11, Ed. 1 Friday, February 6, 2004
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
February 6, 2004
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Coral Radiocarbon Records of Indian Ocean Water Mass Mixing and Wind-Induced Upwelling Along the Coast of Sumatra, Indonesia
Radiocarbon ({sup 14}C) in the skeletal aragonite of annually banded corals track radiocarbon concentrations in dissolved inorganic carbon (DIC) in surface seawater. As a result of nuclear weapons testing in the 1950s, oceanic uptake of excess {sup 14}C in the atmosphere has increased the contrast between surface and deep ocean {sup 14}C concentrations. We present accelerator mass spectrometric (AMS) measurements of radiocarbon isotope ({Delta}{sup 14}C) in Porites corals from the Mentawai Islands, Sumatra (0 S, 98 E) and Watamu, Kenya (3 S, 39 E) to document the temporal and spatial evolution of the {sup 14}C gradient in the tropical Indian Ocean. The rise in {Delta}{sup 14}C in the Sumatra coral, in response to the maximum in nuclear weapons testing, is delayed by 2-3 years relative to the rise in coral {Delta}{sup 14}C from the coast of Kenya. Kenya coral {Delta}{sup 14}C values rise quickly because surface waters are in prolonged contact with the atmosphere. In contrast, wind-induced upwelling and rapid mixing along the coast of Sumatra entrains {sup 14}C-depleted water from the subsurface, which dilutes the effect of the uptake of bomb-laden {sup 14}C by the surface-ocean. Bimonthly AMS {Delta}{sup 14}C measurements on the Mentawai coral reveal mainly interannual variability …
Date:
February 6, 2004
Creator:
Guilderson, T. P.; Grumet, N. S.; Abram, N. J.; Beck, J. W.; Dunbar, R. B.; Gagan, M. K. et al.
Object Type:
Article
System:
The UNT Digital Library