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Activation Energy for Grain Growth in Aluminum Coatings (open access)

Activation Energy for Grain Growth in Aluminum Coatings

To produce a specific grain size in metallic coatings requires precise control of the time at temperature during the deposition process. Aluminum coatings are deposited using electron-beam evaporation onto heated substrate surfaces. The grain size of the coating is determined upon examination of the microstructure in plan view and cross-section. Ideal grain growth is observed over the entire experimental range of temperature examined from 413 to 843 K. A transition in the activation energy for grain growth from 0.7 to 3.8 eV {center_dot} atom{sup -1} is observed as the temperature increases from <526 K to >588 K. The transition is indicative of the dominant mechanism for grain growth shifting with increasing temperature from grain boundary to lattice diffusion.
Date: October 14, 2004
Creator: Jankowski, Alan Frederic; Ferreira, J. L. & Hayes, Jeffrey P.
Object Type: Article
System: The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 129, No. 20, Ed. 1 Thursday, October 14, 2004 (open access)

The Albany News (Albany, Tex.), Vol. 129, No. 20, Ed. 1 Thursday, October 14, 2004

Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date: October 14, 2004
Creator: Lucas, Melinda L.
Object Type: Newspaper
System: The Portal to Texas History
Altus Times (Altus, Okla.), Vol. 106, No. 168, Ed. 1 Thursday, October 14, 2004 (open access)

Altus Times (Altus, Okla.), Vol. 106, No. 168, Ed. 1 Thursday, October 14, 2004

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: October 14, 2004
Creator: Andrews, Mike
Object Type: Newspaper
System: The Gateway to Oklahoma History
Annual Report for LDRD-04-FS-019 The Innermost Inner Core: Fact or Artifact? (open access)

Annual Report for LDRD-04-FS-019 The Innermost Inner Core: Fact or Artifact?

There is considerable debate in the Earth sciences over the composition, thermal history, and dynamics of Earth's inner core. The details of structural models are based on precious few seismological observations of PKP travel times, due to the uneven distribution of large earthquakes and recording stations around the globe. Using state-of-the-art signal-processing techniques to measure and compile a unique set of global travel time data of surface-reflected seismic waves that propagate through the center of Earth (PKPPKP waves), we propose to investigate the existence of the innermost inner core. We will carry out a systematic investigation to determine the configuration of inner core anisotropy, which is currently biased by a limited spatial sampling of the inner core by PKP waves. We expect to collect data set of waveforms and identify PKPPKP energy arrivals on existing seismological records in a systematic form. We expect to demonstrate whether or not the existence of the innermost inner core can be supported by seismological data and to provide major constraints on the amount of inner core anisotropy. This is a topic of very high interest in the earth science community and the results would be of great importance not only to seismologists but to …
Date: October 14, 2004
Creator: Tkalcic, H & Flanagan, M P
Object Type: Report
System: The UNT Digital Library
Archer County News (Archer City, Tex.), No. 42, Ed. 1 Thursday, October 14, 2004 (open access)

Archer County News (Archer City, Tex.), No. 42, Ed. 1 Thursday, October 14, 2004

Weekly newspaper from Archer City, Texas that includes local, state, and national news along with advertising.
Date: October 14, 2004
Creator: Lewis, Shelley
Object Type: Newspaper
System: The Portal to Texas History
Automatic Enrollment in Section 401(k) Plans (open access)

Automatic Enrollment in Section 401(k) Plans

This is a report on Automatic Enrollment in section 401(k) plans.
Date: October 14, 2004
Creator: Purcell, Patrick
Object Type: Report
System: The UNT Digital Library
Automatic Enrollment in Section 401(k) Plans (open access)

Automatic Enrollment in Section 401(k) Plans

This report discusses enrollment practices for 401k retirement plans. Historically, most employers that have sponsored retirement savings plans under §401(k) of the Internal Revenue Code (IRC) have required employees to decide whether to enroll in the plan. The Internal Revenue Service (IRS) has issued rulings to inform employers that current law allows them to enroll employees automatically, provided that the employee is notified in advance and is permitted to leave the plan.
Date: October 14, 2004
Creator: Purcell, Patrick
Object Type: Report
System: The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 83, No. 315, Ed. 1 Thursday, October 14, 2004 (open access)

The Baytown Sun (Baytown, Tex.), Vol. 83, No. 315, Ed. 1 Thursday, October 14, 2004

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date: October 14, 2004
Creator: Cash, Wanda Garner
Object Type: Newspaper
System: The Portal to Texas History
The Canadian Record (Canadian, Tex.), Vol. 114, No. 42, Ed. 1 Thursday, October 14, 2004 (open access)

The Canadian Record (Canadian, Tex.), Vol. 114, No. 42, Ed. 1 Thursday, October 14, 2004

Weekly newspaper from Canadian, Texas that includes local, state and national news along with some advertising.
Date: October 14, 2004
Creator: Brown, Laurie Ezzell
Object Type: Newspaper
System: The Portal to Texas History
Characterize Framework for Igneous Activity at Yucca Mountain, Nevada (open access)

Characterize Framework for Igneous Activity at Yucca Mountain, Nevada

The purpose of this scientific analysis report is threefold: (1) Present a conceptual framework of igneous activity in the Yucca Mountain region (YMR) consistent with the volcanic and tectonic history of this region and the assessment of this history by experts who participated in the probabilistic volcanic hazard analysis (PVHA) (CRWMS M&O 1996 [DIRS 100116]). Conceptual models presented in the PVHA are summarized and applied in areas in which new information has been presented. Alternative conceptual models are discussed, as well as their impact on probability models. The relationship between volcanic source zones defined in the PVHA and structural features of the YMR are described based on discussions in the PVHA and studies presented since the PVHA. (2) Present revised probability calculations based on PVHA outputs for a repository footprint proposed in 2003 (BSC 2003 [DIRS 162289]), rather than the footprint used at the time of the PVHA. This analysis report also calculates the probability of an eruptive center(s) forming within the repository footprint using information developed in the PVHA. Probability distributions are presented for the length and orientation of volcanic dikes located within the repository footprint and for the number of eruptive centers (conditional on a dike intersecting the …
Date: October 14, 2004
Creator: Perry, F. & Youngs, R.
Object Type: Report
System: The UNT Digital Library
Classroom HVAC: Improving ventilation and saving energy -- field study plan (open access)

Classroom HVAC: Improving ventilation and saving energy -- field study plan

The primary goals of this research effort are to develop, evaluate, and demonstrate a very practical HVAC system for classrooms that consistently provides classrooms (CRs) with the quantity of ventilation in current minimum standards, while saving energy, and reducing HVAC-related noise levels. This research is motivated by the public benefits of energy efficiency, evidence that many CRs are under-ventilated, and public concerns about indoor environmental quality in CRs. This document provides a summary of the detailed plans developed for the field study that will take place in 2005 to evaluate the energy and IAQ performance of a new classroom HVAC technology. The field study will include measurements of HVAC energy use, ventilation rates, and IEQ conditions in 10 classrooms with the new HVAC technology and in six control classrooms with a standard HVAC system. Energy use and many IEQ parameters will be monitored continuously, while other IEQ measurements will be will be performed seasonally. Continuously monitored data will be remotely accessed via a LonWorks network. Instrument calibration plans that vary with the type of instrumentation used are established. Statistical tests will be employed to compare energy use and IEQ conditions with the new and standard HVAC systems. Strengths of this …
Date: October 14, 2004
Creator: Apte, Michael G.; Faulkner, David; Hodgson, Alfred T. & Sullivan, Douglas P.
Object Type: Report
System: The UNT Digital Library
Comanche Chief (Comanche, Tex.), No. 24, Ed. 1 Thursday, October 14, 2004 (open access)

Comanche Chief (Comanche, Tex.), No. 24, Ed. 1 Thursday, October 14, 2004

Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date: October 14, 2004
Creator: Wilkerson, James C., III
Object Type: Newspaper
System: The Portal to Texas History
Cooper Review (Cooper, Tex.), Vol. 124, No. 42, Ed. 1 Thursday, October 14, 2004 (open access)

Cooper Review (Cooper, Tex.), Vol. 124, No. 42, Ed. 1 Thursday, October 14, 2004

Weekly newspaper from Cooper, Texas that includes local, state, and national news along with advertising.
Date: October 14, 2004
Creator: Pinson, Beth
Object Type: Newspaper
System: The Portal to Texas History
DNA Testing for Law Enforcement: Legislative Issues for Congress (open access)

DNA Testing for Law Enforcement: Legislative Issues for Congress

DNA evidence is a powerful forensic tool in criminal cases. Its use and capabilities have increased substantially since it was first introduced in the late 1980s. That growth has led to the emergence of the following issues that were considered by the 106th Congress in legislative initiatives: eliminating the nationwide backlog of unanalyzed DNA samples, expanding the kinds of offenders who are profiled, providing opportunities for post-conviction testing of DNA evidence, and continuing development of forensic science capabilities. This report discusses those and related issues and the legislation proposed and enacted to address them. It begins by describing provisions in prior federal law and then discusses issues and the legislation proposed, including the enacted DNA Analysis Backlog Elimination Act of 2000 (H.R. 4640, which became P.L. 106-546).
Date: October 14, 2004
Creator: Hill, Cindy
Object Type: Report
System: The UNT Digital Library
The Dublin Citizen (Dublin, Tex.), Vol. 15, No. 7, Ed. 1 Thursday, October 14, 2004 (open access)

The Dublin Citizen (Dublin, Tex.), Vol. 15, No. 7, Ed. 1 Thursday, October 14, 2004

Weekly newspaper from Dublin, Texas that includes local, state, and national news along with advertising.
Date: October 14, 2004
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Electra Star-News (Electra, Tex.), Vol. 98, No. 9, Ed. 1 Thursday, October 14, 2004 (open access)

Electra Star-News (Electra, Tex.), Vol. 98, No. 9, Ed. 1 Thursday, October 14, 2004

Weekly newspaper from Electra, Texas that includes local, state, and national news along with advertising.
Date: October 14, 2004
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Engineering Spectral Control Using Front Surface Filters for Maximum TPV Energy Conversion System Performance (open access)

Engineering Spectral Control Using Front Surface Filters for Maximum TPV Energy Conversion System Performance

Energy conversion efficiencies of better than 23% have been demonstrated for small scale tests of a few thermophotovoltaic (TPV) cells using front surface, tandem filters [1, 2]. The engineering challenge is to build this level of efficiency into arrays of cells that provide useful levels of energy. Variations in cell and filter performance will degrade TPV array performance. Repeated fabrication runs of several filters each provide an initial quantification of the fabrication variation for front surface, tandem filters for TPV spectral control. For three performance statistics, within-run variation was measured to be 0.7-1.4 percent, and run-to-run variation was measured to be 0.5-3.2 percent. Fabrication runs using a mask have been shown to reduce variation across interference filters from as high as 8-10 percent to less than 1.5 percent. Finally, several system design and assembly approaches are described to further reduce variation.
Date: October 14, 2004
Creator: Rahmlow, T. D., Jr.; Lazo-Wasem, J.; Gratrix, E.; Azarkevich, J.; Brown, E.; DePoy, D. et al.
Object Type: Article
System: The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Thursday, October 14, 2004 (open access)

The Express-Star (Chickasha, Okla.), Ed. 1 Thursday, October 14, 2004

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date: October 14, 2004
Creator: Bush, Kent
Object Type: Newspaper
System: The Gateway to Oklahoma History
Extended CO Solid: A New Class of High Energy Density Material (open access)

Extended CO Solid: A New Class of High Energy Density Material

Covalently bonded extended phases of molecular solids made of first- and second-row elements at high pressures are a new class of materials with advanced optical, mechanical and energetic properties. The existence of such extended solids has recently been demonstrated using diamond anvil cells in several systems, including N{sub 2}, CO{sub 2},and CO. However, the microscopic quantities produced at the formidable high-pressure/temperature conditions have limited the characterization of their predicted novel properties including high-energy content. In this paper, we present the first experimental evidence that these extended low-Z solids are indeed high energy density materials via milligram-scale high-pressure synthesis, recovery and characterization of polymeric CO (p-CO). Our spectroscopic data reveal that p-CO is a random polymer made of lactonic entities and conjugated C=C with an energy content rivaling or exceeding that of HMX. Solid p-CO explosively decomposes to CO{sub 2} and glassy carbon and thus might be used as an advanced energetic material.
Date: October 14, 2004
Creator: Lipp, M. J.; Evans, W. J.; Baer, B. J. & Yoo, C.
Object Type: Article
System: The UNT Digital Library
Garber Billings News (Garber, Okla.), Vol. 104, No. 51, Ed. 1 Thursday, October 14, 2004 (open access)

Garber Billings News (Garber, Okla.), Vol. 104, No. 51, Ed. 1 Thursday, October 14, 2004

Weekly newspaper from Garber, Oklahoma that includes local, state, and national news along with advertising.
Date: October 14, 2004
Creator: Hogan, Vickie Lee
Object Type: Newspaper
System: The Gateway to Oklahoma History
Homeland Security: Management Challenges Remain in Transforming Immigration Programs (open access)

Homeland Security: Management Challenges Remain in Transforming Immigration Programs

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Homeland Security (DHS) assumed responsibility for the immigration enforcement and services programs of the former Immigration and Naturalization Service (INS) in 2003. The three DHS bureaus with primary responsibility for immigration functions are U.S. Customs and Border Protection (CBP), U.S. Citizenship and Immigration Services (CIS), and U.S. Immigration and Customs Enforcement (ICE). This transfer creates a great opportunity for DHS to address long-standing management and operational problems within INS. The Homeland Security Act requires GAO to review the transfer of immigration functions to DHS. In response, this report assesses the status of (1) communication and coordination of roles and responsibilities, (2) integration of immigration and customs investigators in ICE, and (3) administrative services and systems in CBP, CIS, and ICE."
Date: October 14, 2004
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Hondo Anvil Herald (Hondo, Tex.), Vol. 118, No. 42, Ed. 1 Thursday, October 14, 2004 (open access)

Hondo Anvil Herald (Hondo, Tex.), Vol. 118, No. 42, Ed. 1 Thursday, October 14, 2004

Weekly newspaper from Hondo, Texas that includes local, state, and national news along with extensive advertising.
Date: October 14, 2004
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Implications of Wall Recycling and Carbon Source Locations on Core Plasma Fueling and Impurity Content in DIII-D (open access)

Implications of Wall Recycling and Carbon Source Locations on Core Plasma Fueling and Impurity Content in DIII-D

Measurement and modeling of the 2-D poloidal D{alpha} intensity distribution in DIII-D low and medium density L-mode and ELMy H-mode plasmas indicate that hydrogen neutrals predominantly fuel the core from the divertor X-point region. The 2-D distribution of neutral deuterium and low-charge-state carbon were measured in the divertor and the high-field side midplane scrape-off layer (SOL) using tangentially viewing cameras. The emission in the high-field SOL at the equatorial plane was found to be three to four orders of magnitude lower than at the strike points in the divertor, suggesting a strong divertor particle source. Modeling using the UEDGE/DEGAS codes predicted the poloidal fueling distribution to be dependent on the direction of the ion Bx{Delta}B drift. In plasmas with the Bx{Delta}B drift into the divertor stronger fueling from the inner divertor than from the outer is predicted, due to a lower-temperature and higher-density plasma in the inner leg. UEDGE simulations with carbon produced by both physical and chemical sputtering at the divertor plates and walls only are in agreement with a large set of diagnostic data. The simulations indicate flow reversal in the inner divertor that augments the leakage of carbon ions from the divertor into the core.
Date: October 14, 2004
Creator: Groth, M.; Porter, G. D.; Boedo, J. A.; Brooks, N. H.; Fenstermacher, M. E.; Groebner, R. J. et al.
Object Type: Article
System: The UNT Digital Library
The J-TAC (Stephenville, Tex.), Vol. 168, No. 9, Ed. 1 Thursday, October 14, 2004 (open access)

The J-TAC (Stephenville, Tex.), Vol. 168, No. 9, Ed. 1 Thursday, October 14, 2004

Weekly student newspaper from Tarleton State University in Stephenville, Texas that includes local, state and campus news along with advertising.
Date: October 14, 2004
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History