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Pressure-induced Breaking of Equilibrium Flux Surfaces in the W7AS Stellarator
Calculations are presented for two shots in the W7AS stellarator which differ only in the magnitude of the current in the divertor control coil, but have very different values of experimentally attainable β (<β> ≈ 2.7% versus <β> ≈ 1.8%). Equilibrium calculations find that a region of chaotic magnetic field line trajectories fills approximately the outer 1/3 of the cross-section in each of these configurations. The field lines in the stochastic region are calculated to behave as if the flux surfaces are broken only locally near the outer midplane and are preserved elsewhere. The calculated magnetic field line diffusion coefficients in the stochastic regions for the two shots are consistent with the observed differences in the attainable β, and are also consistent with the differences in the reconstructed pressure profiles.
Date:
April 24, 2007
Creator:
A. Reiman, M.C. Zarnstorff, D. Monticello, A. Weller, J. Geiger, and the W7-AS Team
Object Type:
Article
System:
The UNT Digital Library
Evaluation of the Cask Transportation Facility Modifications (CTFM) compliance to DOE order 6430.1A Project A.5 and A.6
This report was prepared to evaluate the compliance of CTFM to DOE Order 6430.1A. This document presents the results of an evaluation that was performed to assess compliance of the K West (KW) Cask Transportation Facility Modifications (CTFM) designs against applicable requirements of Department of Energy (DOE) Order 6430.1 A, General Design Criteria. This evaluation was grouped under two categories described as Cask Loadout System (CLS) and Cranes/Other Modifications.
Date:
April 24, 2000
Creator:
ARD, K.E.
Object Type:
Report
System:
The UNT Digital Library
Senior Recital: 2007-04-24 - Lucas Frank Albano
Access:
Use of this item is restricted to the UNT Community
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Bachelor of Music (BM) degree.
Date:
April 24, 2007
Creator:
Albano, Lucas Frank
Object Type:
Sound
System:
The UNT Digital Library
Senior Recital: 2007-04-24 - Lucas Frank Albano, percussion
Access:
Use of this item is restricted to the UNT Community
A senior recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Bachelor of Music (BM) degree.
Date:
April 24, 2007
Creator:
Albano, Lucas Frank
Object Type:
Sound
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 26, No. 17, Ed. 1 Thursday, April 24, 2008
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
April 24, 2008
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Intelligent Extruder
''Intelligent Extruder'' described in this report is a software system and associated support services for monitoring and control of compounding extruders to improve material quality, reduce waste and energy use, with minimal addition of new sensors or changes to the factory floor system components. Emphasis is on process improvements to the mixing, melting and de-volatilization of base resins, fillers, pigments, fire retardants and other additives in the :finishing'' stage of high value added engineering polymer materials. While GE Plastics materials were used for experimental studies throughout the program, the concepts and principles are broadly applicable to other manufacturers materials. The project involved a joint collaboration among GE Global Research, GE Industrial Systems and Coperion Werner & Pleiderer, USA, a major manufacturer of compounding equipment. Scope of the program included development of a algorithms for monitoring process material viscosity without rheological sensors or generating waste streams, a novel detection scheme for rapid detection of process upsets and an adaptive feedback control system to compensate for process upsets where at line adjustments are feasible. Software algorithms were implemented and tested on a laboratory scale extruder (50 lb/hr) at GE Global Research and data from a production scale system (2000 lb/hr) at GE …
Date:
April 24, 2003
Creator:
AlperEker; Giammattia, Mark; Houpt, Paul; Kumar, Aditya; Montero, Oscar; Shah, Minesh et al.
Object Type:
Report
System:
The UNT Digital Library
Testing the COncept of Drift Shadow with X-Ray Absorption Imaging
X-ray absorption imaging experiments and measurements of inflow and outflow distribution provide quantitative and vistial evidence for capillary diversion around a drift and a drift-shadow effect. Test cells were constructed from volcanic tuff with either in-plane (one fracture parallel to the face of the test cell) or multi-fracture (with a grid of fractures perpendicular to the test cell) systems. Tracer solutions were dripped in the fractures at ports along the top of the test cell. Discharge along the bottom boundary and in the drift was monitored. Variables included flow rate and fracture aperture. X-ray absorption imaging allowed for visualization of flow paths through the system. Evidence for capillary diversion and drift shadow include: (1) very small (< 1 %,of inflow in most cases) measured discharge into the drift, (2) discharge less than expected under the drift and discharge greater than expected just beyond the drift, and (3) visualization of the tracer-solution flow path from above the drift, around the drift, and shedding beyond the drift. However, tracer was also observed in a natural fracture under the drift in one system. It is unclear whether these high concentrations are due to diversion around the drift and back under the drift or …
Date:
April 24, 2006
Creator:
Altman, S.J.; Forsberg, A.; Peplinski, W. & Ho, CK.
Object Type:
Report
System:
The UNT Digital Library
Guide to Individuals Seated on the House Dais
This report provides information about the Guide to Individuals Seated on the House Dais. The house of representatives meets in the capitol in the house chamber.
Date:
April 24, 2008
Creator:
Amer, Mildred
Object Type:
Report
System:
The UNT Digital Library
High quality ZnO:Al transparent conducting oxide films synthesized by pulsed filtered cathodic arc deposition
Aluminum-doped zinc oxide, ZnO:Al or AZO, is a well-known n-type transparent conducting oxide with great potential in a number of applications currently dominated by indium tin oxide (ITO). In this study, the optical and electrical properties of AZO thin films deposited on glass and silicon by pulsed filtered cathodic arc deposition are systematically studied. In contrast to magnetron sputtering, this technique does not produce energetic negative ions, and therefore ion damage can be minimized. The quality of the AZO films strongly depends on the growth temperature while only marginal improvements are obtained with post-deposition annealing. The best films, grown at a temperature of about 200?C, have resistivities in the low to mid 10-4 Omega cm range with a transmittance better than 85percent in the visible part of the spectrum. It is remarkable that relatively good films of small thickness (60 nm) can be fabricated using this method.
Date:
April 24, 2009
Creator:
Anders, Andre; Lim, Sunnie H.N.; Yu, Kin Man; Andersson, Joakim; Rosen, Johanna; McFarland, Mike et al.
Object Type:
Article
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 107, No. 20, Ed. 1 Sunday, April 24, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 24, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Individuals with Disabilities Education Act (IDEA): Parentally Placed Children in Private Schools
None
Date:
April 24, 2007
Creator:
Apling, Richard N. & Jones, Nancy Lee
Object Type:
Report
System:
The UNT Digital Library
Thinking Differently: Developing a New Energy Economy
Presented by Dr. Dan E. Arvizu at the American Institute of Chemical Engineers (AIChE) 2007 Spring National Meeting on April 24, 2007 in Houston, Texas.
Date:
April 24, 2007
Creator:
Arvizu, D. E.
Object Type:
Presentation
System:
The UNT Digital Library
Study of the decay B0bar -> D* omega pi
We report on a study of the decay {bar B}{sup 0} {yields} D*{sup +}{omega}{pi}{sup -} with the BABAR detector at the PEP-II B-factory at the Stanford Linear Accelerator Center. Based on a sample of 232 million B{bar B} decays, we measure the branching fraction {Beta}({bar B}{sup 0} {yields} D*{sup +}{omega}{pi}{sup -}) = (2.88 {+-} 0.21(stat.) {+-} 0.31(syst.)) x 10{sup -3}. We study the invariant mass spectrum of the {omega}{pi}{sup -} system in this decay. This spectrum is in good agreement with expectations based on factorization and the measured spectrum in {tau}{sup -} {yields} {omega}{pi}{sup -} {nu}{sub {tau}}. We also measure the polarization of the D*{sup +} as a function of the {omega}{pi}{sup -} mass. In the mass region 1.1 to 1.9 GeV we measure the fraction of longitudinal polarization of the D*{sup +} to be {Lambda}{sub L}/{Lambda} = 0.654 {+-} 0.042(stat.) {+-} 0.016(syst.). This is in agreement with the expectations from heavy-quark effective theory and factorization assuming that the decay proceeds as {bar B}{sup 0} {yields} D*{sup +}{rho}(1450), {rho}(1450) {yields} {omega}{pi}{sup -}.
Date:
April 24, 2006
Creator:
Aubert, B.
Object Type:
Report
System:
The UNT Digital Library
Physical Basis for the Maximum Thermal Radiation Emission between Materials
An analytic basis for the limit on intra-media thermal radiation transport has been obtained as a simple function of temperature and material optical properties (n,k). It is shown that optical parameters determine the maximum radiative energy transfer rate by altering media radiative state density and energy density. Quantitative analysis shows that intra-media radiative transfer rates may exceed the radiation into free space as described by the Stephan-Boltzmann equation by several orders of magnitude. The frequency dependence of the optical properties further alters the expected blackbody spectral dependence. This generalized formulation of the limit to thermal radiation transfer in terms of media optical properties expands the understanding and future potential of radiative processes.
Date:
April 24, 2003
Creator:
Baldasaro, P.F. & Beausang, J.F.
Object Type:
Report
System:
The UNT Digital Library
Encouraging PV Adoption in New Market-Rate ResidentialConstruction: A Critical Review of Program Experiences to Date
In this paper, we review experiences with programs to support the deployment of photovoltaics (PV) in new, market-rate homes, drawing upon interviews with program managers around the country, project data, and publicly-available documentation on program design, impacts, and experiences. We focus on state clean energy funds, which have been established in 14 U.S. states to build markets for clean energy resources, as well as a select number of other state or local organizations whose activities are particularly noteworthy. We describe the types of programs implemented and their impacts to date, and discuss key issues and lessons learned for initiatives aimed at growing the new home market for PV.
Date:
April 24, 2006
Creator:
Barbose, Galen; Wiser, Ryan & Bolinger, Mark
Object Type:
Article
System:
The UNT Digital Library
III-Sb (001) growth surfaces: Structure and island nucleation
The authors have determined the reconstructions present on AlSb and GaSb(001) under conditions typical for device growth by molecular beam epitaxy. Within the range of Sb flux and temperature where the diffraction pattern is nominally (1 x 3), three distinct (4 x 3) reconstructions actually occur. The three structures are different than those previously proposed for these growth conditions, with two incorporating mixed III-V dimers on the surface. The presence of these hetero-dimers in the top Sb layer leads to an island nucleation and growth mechanism fundamentally different than for other III-V systems.
Date:
April 24, 2000
Creator:
Barvoso-Carter, W.; Bracker, A. S.; Culbertson, J. C.; Nosho, B. Z.; Shanabrook, B. V.; Whitman, L. J. et al.
Object Type:
Article
System:
The UNT Digital Library
Urban Search and Rescue Task Forces: Facts and Issues
None
Date:
April 24, 2006
Creator:
Bea, Keith
Object Type:
Report
System:
The UNT Digital Library
Magnetic-Field Sensitive Line Ratios in EUV and Soft X-ray Spectra
We discovered a class of lines that are sensitive to the strength of the ambient magnetic field, and present a measurement of such a line in Ar IX near 49 {angstrom}. Calculations show that the magnitude of field strengths that can be measured ranges from a few hundred gauss to several tens of kilogauss depending on the particular ion emitting the line.
Date:
April 24, 2006
Creator:
Beiersdorfer, P; Scofield, J; Brown, G V; Chen, H; Trabert, E & Lepson, J K
Object Type:
Article
System:
The UNT Digital Library
The Cost of Iraq, Afghanistan, and Other Global War on Terror Operations Since 9/11
None
Date:
April 24, 2006
Creator:
Belasco, Amy
Object Type:
Report
System:
The UNT Digital Library
Coupled-Oscillator Model for Nonlinear Optical Activity
Describes linear optical activity which studies non linear optical activity of dimer-like chiral molecules.
Date:
April 24, 2002
Creator:
Belkin, M. A.; Shen, Y. R. & Flytzanis, C.
Object Type:
Article
System:
The UNT Digital Library
[Clipping: Give nukes a chance]
Newspaper clipping outlining reasons the United States might consider using nuclear weapons in warfare; the article also mentions former President John F. Kennedy's stance on nuclear weapons during the Cuban Missile Crisis. There are red markings in pen that were made by Charles E. Reagan, Jr., during his research on President John F. Kennedy.
Date:
April 24, 2005
Creator:
Bennett, Drake
Object Type:
Clipping
System:
The UNT Digital Library
Calculation of Fragmentation Functions in Two-Hadron Semi-Inclusive Processes.
We investigate the properties of interference fragmentation functions arising from the emission of two leading hadrons inside the same jet for inclusive lepton-nucleon deep inelastic scattering. Using an extended spectator model for the mechanism of the hadronization, we give a complete calculation and numerical estimates for the examples of a proton-pion pair produced with invariant mass on the Roper resonance, and of two pions produced with invariant mass close to the {rho} mass. We discuss azimuthal angular dependence of the leading order cross section to point up favourable conditions for extracting transversity from experimental data.
Date:
April 24, 2001
Creator:
Bianconi, A.; Boffi, S.; Boer, D.; Jakob, R. & Radici, M.
Object Type:
Article
System:
The UNT Digital Library
Investigation of the Relationship between Green Design and Project Delivery Methods
The selection of the project delivery method (PDM) for any project is critical--it establishes communication, coordination, and contractual issues between the owner, contractor, and designer. With an increase in the number of green design projects, understanding the relationship between the PDM and green design is paramount to project and contract management. It is reasonable to assume that a positive relationship between green design and design-build (DB) exists since both theoretically are intended to foster an integrated, holistic, and collaborative project. This research examines the relationship between the design-bid-build (DBB), construction management (CM), and DB PDMs and green design with the goal of establishing best practices and identifying potential synergies between them. The research collected information by conducting primarily telephone interviews with approximately twenty-five individuals, including owners, contractors, and designers involved in completed green design projects, mainly in the public sector. The interviews developed a general understanding of the current state of knowledge and experience and not a rigorous quantitative analysis. Upon completion of the interviews, the tabulated results were summarized and green project characteristics and project-PDM interactions emerged. Existing published research was evaluated to reveal aspects of PDMs independent of green design. Best practices were ascertained by combining information from …
Date:
April 24, 2008
Creator:
Bilec, Melissa M. & Ries, Robert J.
Object Type:
Report
System:
The UNT Digital Library
Completion of an Undulator-Based X-ray Scattering Facility for Materials Research on Complex Fluids
A synchrotron radiation-based X-ray scattering facility for materials research on complex fluids has been completed on Sector 09 at the Advanced Photon Source at Argonne National Laboratory. It consists of a beamline on an undulator magnet source with doubly focusing X-ray optics and endstation spectrometers for both small angle X-ray scattering and liquid surface X-ray scattering.
Date:
April 24, 2002
Creator:
Blasie, J. Kent
Object Type:
Report
System:
The UNT Digital Library