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Altus Times (Altus, Okla.), Vol. 108, No. 140, Ed. 1 Monday, September 11, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 11, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 108, No. 166, Ed. 1 Wednesday, October 11, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 11, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 108, No. 219, Ed. 1 Monday, December 11, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 11, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Analysis of Density Changes in Plutonium Observed from Accelerated Aging Using Pu-238 Enrichment
We present dimensional and density changes in an aging plutonium alloy enriched with 7.3 at.% of {sup 238}Pu and reference alloys of various ages. After 45 equivalent years of aging, the enriched alloys at 35 C have swelled in volume by 0.14 to 0.16% and now exhibit a near linear volume increase, without void swelling. Based on X-ray diffraction measurements, the lattice expansion by self-irradiation appears to be the primary cause for dimensional changes during the initial 2-3 years of aging. Following the initial transient, the density change is primarily cause by a constant helium in-growth rate as a result of {alpha}-particle decay.
Date:
July 11, 2006
Creator:
Chung, B. W.; Saw, C. K.; Thompson, S. R.; Quick, T. M.; Woods, C. H.; Hopkins, D. J. et al.
Object Type:
Article
System:
The UNT Digital Library
Analysis of Off-Nuclear X-Ray Sources in Galaxy NGC 4945
Recently, X-ray astronomy has been used to investigate objects such as galaxies, clusters of galaxies, Active Galactic Nuclei (AGN), quasars, starburst superbubbles of hot gas, X-ray binary systems, stars, supernova remnants, and interstellar and intergalactic material. By studying the x-ray emission patterns of these objects, we can gain a greater understanding of their structure and evolution. We analyze X-ray emission from the galaxy NGC 4945 using data taken by the Chandra X-ray Observatory. The Chandra Interactive Analysis of Observations (CIAO) software package was used to extract and fit energy spectra and to extract light curves for the brightest off-nuclear sources in two different observations of NGC 4945 (January, 2000 and May, 2004). A majority of sources were closely fit by both absorbed power law and absorbed bremsstrahlung models, with a significantly poorer {chi}{sup 2}/dof for the absorbed blackbody model, and most sources had little variability. This indicates that the sources are accreting binary systems with either a neutron star or black hole as the compact object. The calculated luminosities were about 10{sup 38} erg/s, which implies that the mass of the accreting object is close to 10 solar masses and must be a black hole.
Date:
September 11, 2006
Creator:
Harrison, Sarah M. & /SLAC, /MIT
Object Type:
Report
System:
The UNT Digital Library
An Analysis of Shot Noise Propagation and Amplificationin Harmonic Cascade FELs
The harmonic generation process in a harmonic cascade (HC) FEL is subject to noise degradation which is proportional to the square of the total harmonic order. In this paper, we study the shot noise evolution in the first-stage modulator and radiator of a HC FEL that produces the dominant noise contributions. We derive the effective input noise for a modulator operating in the low-gain regime, and analyze the radiator noise for a density-modulated beam. The significance of these noise sources in different harmonic cascade designs is also discussed.
Date:
December 11, 2006
Creator:
Huang, Z.
Object Type:
Article
System:
The UNT Digital Library
An Analytical Modeling Method for Calculating the Current Delivery Capacity of a Thin-Film Cathode and the Stability of Localized Corrosion Under Atmospheric Environemnts
Corrosion resistant materials under atmospheric conditions can suffer from localized corrosion (e.g., pitting, crevice, stress-corrosion cracking). The stability of such a localized corrosion site requires that the site (anode) must dissolve at a sufficiently high rate to maintain the critical chemistry and that it be coupled to a wetted surrounding area (cathode) that can provide a matching cathodic current. The objectives of this study were to computationally characterize the stability of such a local corrosion system and to explore the effects of physiochemical and electrochemical parameters. The overall goal of the work is to contribute to the establishment of a scientific basis for the prediction of the stabilization of localized attack. An analytical method is presented for evaluating the stability of localized corrosion of corrosion-resistant alloys under thin-layer (or atmospheric) conditions. The method requires input data that are either thermodynamic in nature or easily obtained experimentally. The maximum cathode current available depends on the cathode geometry, temperature, relative humidity, deposition density of salt (i.e., mass of salt per unit area of cathode), and interfacial electrochemical kinetics. The anode demand depends on the crevice geometry, the position of attack within the crevice, and the localized corrosion stability product. The localized corrosion …
Date:
October 11, 2006
Creator:
Chen, Z.Y. & Kelly, R.G.
Object Type:
Report
System:
The UNT Digital Library
Archer County Advocate (Holliday, Tex.), Vol. 4, No. 5, Ed. 1 Thursday, May 11, 2006
Weekly newspaper from Holliday, Texas that includes local, state, and national news along with advertising.
Date:
May 11, 2006
Creator:
Stevens, Charlotte
Object Type:
Newspaper
System:
The Portal to Texas History
[Audience members watch the band]
Audience members watch the band at the Duke Ellington Small Band Concert held by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
November 11, 2006
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
BaBar: sin(2beta+gamma)
The time-dependent CP asymmetries in fully reconstructed B{sup 0} {yields} D{sup (*){+-}}{pi}{sup {-+}}/{rho}{sup {-+}} decays (new preliminary result), and in partially reconstructed B{sup 0} {yields} D{sup (*){+-}}{pi}{sup {-+}} decays, are measured with the BABAR detector at the PEP-II asymmetric B factory at SLAC, using 232 million {Upsilon}(4S) {yields} B{bar B} decays. We combine the above results and, using other measurements and theoretical assumptions, they interpret them in terms of the angles of the unitarity triangle describing the Cabibbo-Kobayashi-Maskawa matrix. They find |sin(2{beta} + {gamma})| > 0.64(0.42) at 68%(90%) confidence level using a frequentistic approach and |2{beta}+ {gamma}| = (90 {+-} 43){sup o} using a Bayesian approach.
Date:
January 11, 2006
Creator:
Voena, Cecilia
Object Type:
Article
System:
The UNT Digital Library
[Band on stage]
Band on stage at the Duke Ellington Small Band Concert held by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
November 11, 2006
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Band playing on stage]
Band playing on stage at the Duke Ellington Small Band Concert held by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
November 11, 2006
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Band playing on stage]
Band playing on stage at the Duke Ellington Small Band Concert held by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
November 11, 2006
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Band playing on stage]
Band playing on stage at the Duke Ellington Small Band Concert held by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
November 11, 2006
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Band playing on stage]
Band playing on stage at the Duke Ellington Small Band Concert held by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
November 11, 2006
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
Base Input Air Force - Nashville TN
Base Input - Air Force - Nashville International Airport Air Guard Station - TN
Date:
January 11, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Base Input - Coronado-CA
Base Input - Coronado-CA Naval Air Depot North Island
Date:
January 11, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Base Input Ellington Field AGS, TX
Base Input Air Force - Ellington Field Air Guard Station - TX
Date:
January 11, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Base Input Fort Belvoir, VA
Base Input Fort Belvoir, VA Army Team Wes Hood. Night Vision Lab Briefing
Date:
January 11, 2006
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
Base Input - Lambert Intl Airport - MO
Base Input Air Force - Lambert International Airport, St. Louis - MO
Date:
January 11, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Base Input Mansfield Lahm MAP AGS - OH
Base Input - Air Force - Mansfield Lahm MAP Air Guard Station - OH
Date:
January 11, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Base Input Naval base Coronado-CA
Base Input Naval Base Coronado-CA Navy/MC
Date:
January 11, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Base Input Reno - Tahoe
Base Input - Air Force - Reno-Tahoe International Airport Air Guard Station - NV
Date:
January 11, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Base Input - Shepard AFB - TX
Base Input - Shepard AFB, TX
Date:
January 11, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library