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Determination of Band Curvatures by Angle-resolved Two-photonPhotoemission in thin films of C(60) on Ag(111)
The thickness-dependent interfacial band structure wasdetermined for thin films of Co(6) on Ag(111) by angle-resolvedtwo-photon photoemission spectroscopy.
Date:
March 1, 2005
Creator:
Shipman, Steven T.; Szymanski, Paul; Garrett-Roe, Sean; Yang,Aram; Strader, Matthew L. & Harris, Charles B.
Object Type:
Article
System:
The UNT Digital Library
Development of an efficient large-aperture high damage-threshold sol-gel diffraction grating.
In order to develop the next generation of high peak intensity lasers, new grating technology providing higher damage thresholds and large apertures is required. The current assumption is that this technical innovation will be multilayer dielectric gratings, wherein the uppermost layer of a thin film mirror is etched to create the desired binary phase grating. A variant of this is explored with the upper grating layer being a lower density gelatin-based volume phase grating in either sol-gel or dichromated gelatin. One key benefit is the elimination of the etching step.
Date:
March 1, 2005
Creator:
Ashley, Carol S.; Rambo, Patrick K.; Schwarz, Jens; Dunphy, Darren Robert; Branson, Eric D.; Smith, Ian Craig et al.
Object Type:
Report
System:
The UNT Digital Library
Development of vertexing and lifetime triggers and a study of B(s) mixing using hadronic decays at D0
The D0 detector underwent a major upgrade to maximize its ability to fully exploit Run II at the Fermilab Tevatron, the world's highest energy collider. The upgrade included a completely new central tracking system with an outer scintillating fiber tracker and an inner silicon vertex detector all within a 2T superconducting solenoid. This thesis describes the development of high level trigger algorithms including vertexing, impact parameter significance and invariant mass, that utilize tracks from these detectors. One of the main physics goals of Run II is the observation of B{sub s} oscillations. This measurement, which cannot be performed at the B factories, will significantly constrain the ''unitarity triangle'' associated with Cp violation and so probe the Standard Model of particle physics. Furthermore this is an interesting measurement as the study of mixing in meson systems has a long history for revealing new physics. The second part of this thesis presents a study of the hadronic decay B{sub s} {yields} D{sub s}{pi}. This important mode provides the best proper time resolution for B{sub s} mixing and is reconstructed for the first time at D0. Projections on the sensitivity to B{sub s} oscillations are then presented.
Date:
March 1, 2005
Creator:
Barnes, Christopher P.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
DGS Newsletter, Volume 29, Number 3, March 2005
Newsletter of the Dallas Genealogical Society discussing membership, Society meetings, genealogical workshops and events, and other news of interest to members.
Date:
March 2005
Creator:
Dallas Genealogical Society
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Diamond-like nanocomposite coatings for LIGA-fabricated nickel alloy parts.
A commercial plasma enhanced chemical vapor deposition (PECVD) technique with planetary substrate rotation was used to apply a thin (200-400 nm thick) conformal diamond-like carbon (DLC) coating (known as a diamond-like nanocomposite (DLN)) on LIGA fabricated Ni-Mn alloy parts. The PECVD technique is known to overcome the drawbacks associated with the line-of-sight nature of physical vapor deposition (PVD) and substrate heating inherent with traditional chemical vapor deposition (CVD). The purpose of the present study is to characterize the coverage, adhesion, and tribological (friction and wear) behavior of DLN coatings applied to planar and sidewall surfaces of small featured LIGA Ni-Mn fabricated parts, e.g. 280 {micro}m thick sidewalls. Friction and wear tests were performed in dry nitrogen, dry air, and air with 50% RH at Hertzian contact pressures ranging from 0.3 to 0.6 GPa. The friction coefficient of bare Ni-Mn alloy was determined to be 0.9. In contrast, low friction coefficients ({approx}0.02 in dry nitrogen and {approx}0.2 in 50% RH air) and minimal amount of wear were exhibited for the DLN coated LIGA Ni-Mn alloy parts and test coupons. This behavior was due to the ability of the coating to transfer to the rubbing counterface providing low interfacial shear at the …
Date:
March 1, 2005
Creator:
Prasad, Somuri V. & Scharf, Thomas W.
Object Type:
Report
System:
The UNT Digital Library
Diffusion Coatings for Corrosion-Resistant Components in Coal Gasification Systems Quarterly Technical Progress Report: Number 6
Heat-exchangers, particle filters, turbines, and other components in integrated coal gasification combined cycle system must withstand the highly sulfiding conditions of the high temperature coal gas over an extended period of time. The performance of components degrades significantly with time unless expensive high alloy materials are used. Deposition of a suitable coating on a low cost alloy may improve is resistance to such sulfidation attack and decrease capital and operating costs. The alloys used in the gasifier service include austenitic and ferritic stainless steels, nickel-chromium-iron alloys, and expensive nickel-cobalt alloys. During this reporting period we conducted two exposure tests with coated and uncoated coupons. The first one was aborted after a short period, because of a leak in the pressure regulator of a CO/CO{sub 2}/H{sub 2} gas mixture gas cylinder that was used to prepare the simulated coal gas stream. Nevertheless, this run was very instructive as it showed that during the brief exposure when the concentration of H{sub 2}S increased to 8.6%, even specialty alloys such as HR160 and I800 were badly corroded, yet the sample of a SS405-steel that was coated with Ti/Ta showed no signs of corrosion. After replacing the pressure regulator, a second run was conducted …
Date:
March 1, 2005
Creator:
Krishnan, Gopala N.; Malhotra, Ripudaman; Alvarez, Esperanza; Lau, Kai-Hung & Sanjurjo, Angel
Object Type:
Report
System:
The UNT Digital Library
Digests of Appropriations Law Decisions and Opinions (October 2003 to December 2004)
Other written product issued by the Government Accountability Office with an abstract that begins "GAO published digests of appropriations law decisions and opinions for the months of October 2003 through December 2004."
Date:
March 1, 2005
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Disposal of Domestic or Exotic Livestock Carcasses
This document is a summary of suggested guidelines for disposal of farm or ranch animals.
Date:
March 2005
Creator:
Texas Commission on Environmental Quality
Object Type:
Text
System:
The Portal to Texas History
Distributed and Electric Power System Aggregation Model and Field Configuration Equivalency Validation Testing: Supplemental Report on Penetration Software Algorithms
This report supplements the July 2003 report ''Distributed and Electric Power System Aggregation Model and Field Configuration Equivalency Validation Testing'' (NREL/SR-560-33909). The original report presented methods for calculating penetration limits for distributed energy resources interconnected with distribution circuits of utility-owned electric power systems. This report describes the algorithms required to develop application software to calculate penetration limits. The original report can be found at http://www.nrel.gov/docs/fy03osti/33909.pdf.
Date:
March 1, 2005
Creator:
Davis, M.; Costyk, D. & Narang, A.
Object Type:
Report
System:
The UNT Digital Library
[Doctor speaks to parent and child]
Dr. Henry Lenk speaks to a mother and child.
Date:
March 1, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Donation box]
A bilingual sign on a donation box states the following: "Our services are free of charge. Thank you for your donation. Mission Fort Worth."
Date:
March 1, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Dr. Henry Lenk and a clinic staff member communicate with a patient]
Dr. Henry Lenk and a clinic staff member communicate with a patient and her child.
Date:
March 1, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Dr. Henry Lenk and clinic staff member look at mother and child]
Dr. Hnery Lenk and clinic staff member look at mother and child.
Date:
March 1, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Dr. Henry Lenk and patient]
Dr. Henry Lenk performs an examination on a female patient.
Date:
March 1, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Dr. Henry Lenk examines the mouth of a female patient]
Dr. Henry Lenk examines the mouth of a female patient.
Date:
March 1, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Dr. Henry Lenk feels a female patient's face]
Dr. Henry Lenk feels the sides of the face of a female patient.
Date:
March 1, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Dr. Henry Lenk speaks with clinic staff member as mother and child wait]
Dr. Henry Lenk speaks to clinic staff member as mother and child wait.
Date:
March 1, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Dr Pepper Museum: Celebrating the Iconic Soft Drink]
Step into the rich history of one of America's favorite soft drinks at the Dr Pepper Museum. Housed in the historic Artesian Manufacturing and Bottling Company building, which was the birthplace of Dr Pepper, the museum showcases the fascinating journey of this iconic beverage and the soft drink industry. With a diverse collection of soft drink memorabilia, including items from various brands, the museum offers an immersive and educational experience, serving as a valuable resource for learning and exploration. Explore the meticulously preserved buildings and delve into the legacy of Dr Pepper and the captivating world of soft drinks at this renowned Waco landmark.
Date:
March 2005
Creator:
Mallory, Randy
Object Type:
Photograph
System:
The UNT Digital Library
Drug Control: International Policy and Approaches
Over the past decade, worldwide production of illicit drugs has risen dramatically: opium and marijuana production has roughly doubled and coca production tripled. Street prices of cocaine and heroin have fallen significantly in the past 20 years, reflecting increased availability. Despite apparent national political resolve to deal with the drug problem, inherent contradictions regularly appear between U.S. anti-drug policy and other national policy goals and concerns. The mix of competing domestic and international pressures and priorities has produced an ongoing series of disputes within and between the legislative and executive branches concerning U.S. international drug policy. One contentious issue has been the Congressionally-mandated certification process, an instrument designed to induce specified drug-exporting countries to prioritize or pay more attention to the fight against narcotics businesses.
Date:
March 1, 2005
Creator:
Perl, Raphael F.
Object Type:
Report
System:
The UNT Digital Library
Duct Tape and Sealant Performance
None
Date:
March 1, 2005
Creator:
Walker, Iain S. & Sherman, Max H.
Object Type:
Article
System:
The UNT Digital Library
Ecological Monitoring and Compliance Program Fiscal/Calendar Year 2004 Report
The Ecological Monitoring and Compliance program, funded through the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office, monitors the ecosystem of the Nevada Test Site and ensures compliance with laws and regulations pertaining to Nevada Test Site biota. This report summarizes the program's activities conducted by Bechtel Nevada during the Fiscal Year 2004 and the additional months of October, November, and December 2004, reflecting a change in the monitoring period to a calendar year rather than a fiscal year as reported in the past. This change in the monitoring period was made to better accommodate information required for the Nevada Test Site Environmental Report, which reports on a calendar year rather than a fiscal year. Program activities included: (1) biological surveys at proposed construction sites, (2) desert tortoise compliance, (3) ecosystem mapping and data management, (4) sensitive species and unique habitat monitoring, (5) habitat restoration monitoring, and (6) biological monitoring at the Hazardous Materials Spill Center.
Date:
March 2005
Creator:
Bechtel Nevada
Object Type:
Report
System:
The UNT Digital Library
[Eddy Herrera holds door open]
Eddy Herrera holds the door open for someone.
Date:
March 1, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Eddy Herrera leans against doorway as clinic staff member is in the background]
Eddy Herrera stands in the doorway of an office as a clinic staff member glances at a medical file while walking.
Date:
March 1, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Eddy Herrera leans against doorway with clinic staff member in the background]
Eddy Herrera stands in the doorway of an office while a clinic staff member walks by reading a medical file.
Date:
March 1, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library