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Finite Cosmology and a CMB Cold Spot (open access)

Finite Cosmology and a CMB Cold Spot

The standard cosmological model posits a spatially flat universe of infinite extent. However, no observation, even in principle, could verify that the matter extends to infinity. In this work we model the universe as a finite spherical ball of dust and dark energy, and obtain a lower limit estimate of its mass and present size: the mass is at least 5 x 10{sup 23}M{sub {circle_dot}} and the present radius is at least 50 Gly. If we are not too far from the dust-ball edge we might expect to see a cold spot in the cosmic microwave background, and there might be suppression of the low multipoles in the angular power spectrum. Thus the model may be testable, at least in principle. We also obtain and discuss the geometry exterior to the dust ball; it is Schwarzschild-de Sitter with a naked singularity, and provides an interesting picture of cosmogenesis. Finally we briefly sketch how radiation and inflation eras may be incorporated into the model.
Date: March 20, 2006
Creator: Adler, R. J.; Bjorken, J. D. & Overduin, J.M.
Object Type: Report
System: The UNT Digital Library

Doctoral Recital: 2006-03-20 – Anthony Allgeier, clarinet

Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree
Date: March 20, 2006
Creator: Allgeier, Anthony
Object Type: Sound
System: The UNT Digital Library
Country-of-Origin Labeling for Foods (open access)

Country-of-Origin Labeling for Foods

This report briefly discusses the USDA's FY2006 appropriation, which postpones rules requiring many retailers to provide country-of-origin labeling (COOL) for fresh produce, red meats, and peanuts until September 30, 2008. The report also discusses related legislation.
Date: March 20, 2006
Creator: Becker, Geoffrey S.
Object Type: Report
System: The UNT Digital Library
Space Launch Vehicles: Government Activities, Commercial Competition, and Satellite Exports (open access)

Space Launch Vehicles: Government Activities, Commercial Competition, and Satellite Exports

This report various sides of the debate related to domestic launch services, such as satellite export issues, the development of new launch vehicles by the private sector, and whether tax incentives or loan guarantees should be created for companies attempting to develop lower-cost launch vehicles.
Date: March 20, 2006
Creator: Behrens, Carl E.
Object Type: Report
System: The UNT Digital Library
A Directed Energy System for Defeat of Improvised Explosive Devices and Landmines (open access)

A Directed Energy System for Defeat of Improvised Explosive Devices and Landmines

We describe a laser system, built in our laboratory at LLNL, that has near-term, effective applications in exposing and neutralizing improvised explosive devices and landmines. We discuss experiments with this laser, demonstrating excavation capabilities and relevant material interactions. Model results are also described.
Date: March 20, 2006
Creator: Boley, C.; Fochs, S.; Parker, J.; Rotter, M.; Rubenchik, A. & Yamamoto, R.
Object Type: Article
System: The UNT Digital Library
LITHOSTRATIGRAPHY AND SHEAR-WAVE VELOCITY IN THE CRYSTALLIZED TOPOPAH SPRING TUFF, YUCCA MOUNTAIN, NEVADA (open access)

LITHOSTRATIGRAPHY AND SHEAR-WAVE VELOCITY IN THE CRYSTALLIZED TOPOPAH SPRING TUFF, YUCCA MOUNTAIN, NEVADA

Evaluation of the seismic response of the proposed spent nuclear fuel and high-level radioactive waste repository at Yucca Mountain, Nevada, is in part based on the seismic properties of the host rock, the 12.8-million-year-old Topopah Spring Tuff. Because of the processes that formed the tuff, the densely welded and crystallized part has three lithophysal and three nonlithophysal zones, and each zone has characteristic variations in lithostratigraphic features and structures of the rocks. Lithostratigraphic features include lithophysal cavities, rims on lithophysae and some fractures, spots (which are similar to rims but without an associated cavity or aperture), amounts of porosity resulting from welding, crystallization, and vapor-phase corrosion and mineralization, and fractures. Seismic properties, including shear-wave velocity (V{sub s}), have been measured on 38 pieces of core, and there is a good ''first order'' correlation with the lithostratigraphic zones; for example, samples from nonlithophysal zones have larger V{sub s} values compared to samples from lithophysal zones. Some samples have V{sub s} values that are beyond the typical range for the lithostratigraphic zone; however, these samples typically have one or more fractures, ''large'' lithophysal cavities, or ''missing pieces'' relative to the sample size. Shear-wave velocity data measured in the tunnels have similar relations …
Date: March 20, 2006
Creator: Buesch, David; Stokoe, Kenneth H. & Schuhen, Michael
Object Type: Report
System: The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Monday, March 20, 2006 (open access)

The Express-Star (Chickasha, Okla.), Ed. 1 Monday, March 20, 2006

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date: March 20, 2006
Creator: Bush, Kent
Object Type: Newspaper
System: The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 296, Ed. 1 Monday, March 20, 2006 (open access)

Altus Times (Altus, Okla.), Vol. 107, No. 296, Ed. 1 Monday, March 20, 2006

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: March 20, 2006
Creator: Bush, Michael
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Baytown Sun (Baytown, Tex.), Vol. 85, No. 101, Ed. 1 Monday, March 20, 2006 (open access)

The Baytown Sun (Baytown, Tex.), Vol. 85, No. 101, Ed. 1 Monday, March 20, 2006

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date: March 20, 2006
Creator: Cash, Wanda Garner
Object Type: Newspaper
System: The Portal to Texas History

[Elevated view of people with figure of San Martin de Porres]

None
Date: March 20, 2006
Creator: Castillo, José L.
Object Type: Photograph
System: The UNT Digital Library

[Figure of St. Martin de Porres in dark robe with gold trim]

Photograph showing a figure of St. Martin de Porres holding a red cross and wearing a robe with gold trim.
Date: March 20, 2006
Creator: Castillo, José L.
Object Type: Photograph
System: The UNT Digital Library

[Figure of St. Martin de Porres in robe and gold halo]

Photograph showing a figure of saint Martin de Porres holding a red cross and wearing a robe and gold halo.
Date: March 20, 2006
Creator: Castillo, José L.
Object Type: Photograph
System: The UNT Digital Library

[Images of St. Martin De Porres]

The image of St. Martin de Porres with another image of St. Martin in the background during a novena realized by the Fraternity of St. Martin de Porres of Dallas.
Date: March 20, 2006
Creator: Castillo, José L.
Object Type: Photograph
System: The UNT Digital Library

[Man with guitar and three other people singing]

Luis Huaman (right), president of the Fraternity of San Martin de Porres of Dallas, intones a song during the last monthly meeting of the organization. He is accompanied by his wife, Lupe Huaman (second from right), Caricia and Jose Donayre (guitar).
Date: March 20, 2006
Creator: Castillo, José L.
Object Type: Photograph
System: The UNT Digital Library

[People in background with image of saint in foreground]

Dozens of people gather once a month to pray to the dark Saint.
Date: March 20, 2006
Creator: Castillo, José L.
Object Type: Photograph
System: The UNT Digital Library

[Plastic figure of St. Martin de Porres]

None
Date: March 20, 2006
Creator: Castillo, José L.
Object Type: Photograph
System: The UNT Digital Library

[Two figures of San Martin de Porres]

None
Date: March 20, 2006
Creator: Castillo, José L.
Object Type: Photograph
System: The UNT Digital Library
Veneran a San Martín de Porres (open access)

Veneran a San Martín de Porres

This article deals with the Fraternity of St. Martin de Porres that holds monthly worship meetings. Both the original Spanish article and the English translation are included.
Date: March 20, 2006
Creator: Castillo, José L.
Object Type: Text
System: The UNT Digital Library
An Order-of-Magnitude Estimation of Benzene Concentration in Saltstone Vault (open access)

An Order-of-Magnitude Estimation of Benzene Concentration in Saltstone Vault

The contents of Tank 48H that include the tetraphenylborate (TPB) precipitates of potassium and cesium will be grouted and stored in the Saltstone vault. The grouting process is exothermic, which should accelerate the rate of decomposition of TPB precipitates eventually to benzene. Because the vault is not currently outfitted with an active ventilation system, there is a concern that a mixture of flammable gases may form in the vapor space of each cell filled with the curing grout. The purpose of this study was to determine if passive breathing induced by the diurnal fluctuations of barometric pressure would provide any mitigating measure against potential flammability in the cell vapor space. In Revision 0 of this document, a set of algorithms were presented that would predict the equilibrium concentration of benzene in the cell vapor space as a function of benzene generation rate, fill height, and passive breathing rate. The algorithms were derived based on several simplifying assumptions so that order of magnitude estimates could be made quickly for scoping purposes. In particular, it was assumed that passive breathing would occur solely due to barometric pressure fluctuations that were sinusoidal; the resulting algorithm for estimating the rate of passive breathing into …
Date: March 20, 2006
Creator: Choi, A. S.
Object Type: Report
System: The UNT Digital Library
The Message, Volume 41, Number 15, March 2006 (open access)

The Message, Volume 41, Number 15, March 2006

Newsletter of Congregation Beth Yeshurun in Houston, including news and events, upcoming services, member announcements, editorials, and other information of interest to congregants.
Date: March 20, 2006
Creator: Congregation Beth Yeshurun (Houston, Tex.)
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Long-Term Mechanical Behavior of Yucca Mountain Tuff and its Variability, Final Technical Report for Task ORD-FY04-021 (open access)

Long-Term Mechanical Behavior of Yucca Mountain Tuff and its Variability, Final Technical Report for Task ORD-FY04-021

The study of the long term mechanical behavior of Yucca Mountain tuffs is important for several reasons. Long term stability of excavations will affect accessibility (e.g. for inspection purposes), and retrievability. Long term instabilities may induce loading of drip shields and/or emplaced waste, thus affecting drip shield and/or waste package corrosion. Failure of excavations will affect airflow, may affect water flow, and may affect temperature distributions. The long term mechanical behavior of rocks remains an elusive topic, loaded with uncertainties. A variety of approaches have been used to improve the understanding of this complex subject, but it is doubtful that it has reached a stage where firm predictions can be considered feasible. The long term mechanical behavior of "soft" rocks, especially evaporites, and in particular rock salt, has been the subject of numerous investigations (e.g. Cristescu and Hunsche, 1998, Cristescu et al, 2002), and basic approaches towards engineering taking into account the long term behavior of such materials have long been well established (e.g. Dreyer, 1972, 1982). The same is certainly not true of "hard" rocks. While it long has been recognized that the long term strength of ?hard? rocks almost certainly is significantly less than that measured during "short", …
Date: March 20, 2006
Creator: Daemen, Jaak J. K.; Ma, Lumin & Zhao, Guohua
Object Type: Report
System: The UNT Digital Library
Military Recruiting and the Solomon Amendment: The Supreme Court Ruling in Rumsfeld v. FAIR (open access)

Military Recruiting and the Solomon Amendment: The Supreme Court Ruling in Rumsfeld v. FAIR

This report discusses military recruiting and the Solomon amendment, the supreme court ruling on Rumsfeld vs. Fair.
Date: March 20, 2006
Creator: Dale, Charles V.
Object Type: Report
System: The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 90, No. 119, Ed. 1 Monday, March 20, 2006 (open access)

The Oklahoma Daily (Norman, Okla.), Vol. 90, No. 119, Ed. 1 Monday, March 20, 2006

Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date: March 20, 2006
Creator: Ganus, Sara
Object Type: Newspaper
System: The Gateway to Oklahoma History
Hydrogen Technical Analysis -- Dissemination of Information (open access)

Hydrogen Technical Analysis -- Dissemination of Information

SENTECH is a small energy and environmental consulting firm providing technical, analytical, and communications solutions to technology management issues. The activities proposed by SENTECH focused on gathering and developing communications materials and information, and various dissemination activities to present the benefits of hydrogen energy to a broad audience while at the same time establishing permanent communications channels to enable continued two-way dialog with these audiences in future years. Effective communications and information dissemination is critical to the acceptance of new technology. Hydrogen technologies face the additional challenge of safety preconceptions formed primarily as a result of the crash of the Hindenburg. Effective communications play a key role in all aspects of human interaction, and will help to overcome the perceptual barriers, whether of safety, economics, or benefits. As originally proposed SENTECH identified three distinct information dissemination activities to address three distinct but important audiences; these formed the basis for the task structure used in phases 1 and 2. The tasks were: (1) Print information--Brochures that target the certain segment of the population and will be distributed via relevant technical conferences and traditional distribution channels. (2) Face-to-face meetings--With industries identified to have a stake in hydrogen energy. The three industry audiences …
Date: March 20, 2006
Creator: George Kervitsky, Jr.
Object Type: Report
System: The UNT Digital Library