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[Speaker reading at Induction]
Photograph of a woman speaking to the new inductees at the Sigma Tau Delta induction on April 27, 2007. The ceremony was held in the former Rare Book Room in Willis Library.
Date:
April 27, 2007
Creator:
Mears, Michelle M.
Object Type:
Photograph
System:
The UNT Digital Library
Texas Register, Volume 32, Number 17, Pages 2319-2418, April 27, 2007
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
April 27, 2007
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Trajectory Stability Modeling And Tolerances in the LCLS
To maintain stable performance of the Linac Coherent Light Source (LCLS) x-ray free-electron laser, one must control the electron trajectory stability through the undulator to a small fraction of the beam size. BPM-based feedback loops running at 120 Hz will be effective in controlling jitter at low frequencies less than a few Hz. On the other hand, linac and injector stability tolerances must be chosen to limit jitter at higher frequencies. In this paper we study possible sources of high frequency jitter, including: (1) steering coil current regulation; (2) quadrupole magnet transverse vibrations; (3) quadrupole current regulation with transverse misalignments; (4) charge variations coupled to jitter through transverse wakefields of misaligned RF structures; and (5) bunch length variations coupled through coherent synchrotron radiation in the bunch compressor chicanes. Based on this study, we set component tolerances and estimate expected trajectory stability in the LCLS.
Date:
April 27, 2007
Creator:
Wu, J. & Emma, P.
Object Type:
Article
System:
The UNT Digital Library
[Two attendees looking at display case]
Photograph of two attendees looking at a Rare Books display case, after the Sigma Tau Delta induction on April 27, 2007. The man on the left is pointing to a specific item.
Date:
April 27, 2007
Creator:
Mears, Michelle M.
Object Type:
Photograph
System:
The UNT Digital Library
U.S. Foreign Aid to the Palestinians
None
Date:
April 27, 2007
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
A velocity map imaging spectrometer for electron?ion and ion?ion coincidence experiments with synchrotron radiation
We have built a velocity imaging (VMI) spectrometer optimized for angle-resolved photoionization experiments with synchrotron radiation (SR) in the VUV and soft X-tay range. The spectrometer is equiped with four electrostatic lenses that focus the charged photoionization products onto a position-sensitive multi-hit delay-line anode. The use of two additional electrostatic lens elements as compared to the standard design of Eppink and Parker [T.J.B. Eppink and D.H. Parker, Rev. Sci. Instrum. 68 (1997) 3477]provides better focusing of an extended interaction region, which is crucial for most SR applications. Furthermore, the apparatus is equipped with a second micro-channel plate detector opposite to the VMI spectrometer, enabling electron-ion coincidence experiments and thereby mass-resolved ion spectroscopy independent of the time structure of the synchrotron radiation. First results for the photofragmentation of CO2 molecules are presented.
Date:
April 27, 2007
Creator:
Lawrence Berkeley National Laboratory. Advanced Light Source.
Object Type:
Article
System:
The UNT Digital Library
Veterans Benefits Administration: Progress Made in Long-Term Effort to Replace Benefits Payment System, but Challenges Persist
A letter report issued by the Government Accountability Office with an abstract that begins "Since 1996, the Veterans Benefit Administration (VBA) has been working on an initiative to replace its aging system for paying compensation and pension benefits. In 2005, concerned about the slow pace of development, VBA contracted with the Software Engineering Institute (SEI) for an independent evaluation of the project, known as the Veterans Service Network (VETSNET). SEI advised VBA to continue working on the project at a reduced pace while addressing management and organization weaknesses that it determined had hampered the project's progress. GAO was requested to determine to what extent the VETSNET project has followed the course of action recommended by SEI and describe the project's current status. To perform its review, GAO analyzed project documentation, conducted site visits, and interviewed key program officials."
Date:
April 27, 2007
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Absolute Measurement of Electron Cloud Density in a Positively-Charged Particle Beam
Clouds of stray electrons are ubiquitous in particle accelerators and frequently limit the performance of storage rings. Earlier measurements of electron energy distribution and flux to the walls provided only a relative electron cloud density. We have measured electron accumulation using ions expelled by the beam. The ion energy distribution maps the depressed beam potential and gives the dynamic cloud density. Clearing electrode current reveals the static background cloud density, allowing the first absolute measurement of the time-dependent electron cloud density during the beam pulse.
Date:
April 27, 2006
Creator:
Kireeff Covo, Michel; Molvik, Arthur W.; Friedman, Alex; Vay, Jean-Luc; Seidl, Peter A.; Logan, Grant et al.
Object Type:
Article
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 130, No. 48, Ed. 1 Thursday, April 27, 2006
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
April 27, 2006
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
Altus Times (Altus, Okla.), Vol. 107, No. 329, Ed. 1 Thursday, April 27, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 27, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Archer County Advocate (Holliday, Tex.), Vol. 4, No. 3, Ed. 1 Thursday, April 27, 2006
Weekly newspaper from Holliday, Texas that includes local, state, and national news along with advertising.
Date:
April 27, 2006
Creator:
Stevens, Charlotte
Object Type:
Newspaper
System:
The Portal to Texas History
BaBar Silicon Vertex Tracker: Status and Prospects
The BABAR Silicon Vertex Tracker (SVT) has been efficiently operated for six years since the start of data taking in 1999. Due to higher than expected background levels some unforeseen effects have appeared. We discuss: a shift in the pedestal for the channels of the AToM readout chips that are most exposed to radiation; an anomalous increase in the bias leakage current for the modules in the outer layers. Estimates of future radiation doses and occupancies are shown together with the extrapolated detector performance and lifetime, in light of the new observations.
Date:
April 27, 2006
Creator:
Re, V.; Bondioli, M.; Bruinsma, M.; Curry, S.; Kirkby, D.; Berryhill, J. et al.
Object Type:
Article
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 85, No. 138, Ed. 1 Thursday, April 27, 2006
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
April 27, 2006
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Canadian Record (Canadian, Tex.), Vol. 116, No. 17, Ed. 1 Thursday, April 27, 2006
Weekly newspaper from Canadian, Texas that includes local, state and national news along with some advertising.
Date:
April 27, 2006
Creator:
Brown, Laurie Ezzell
Object Type:
Newspaper
System:
The Portal to Texas History
Capitol Visitor Center: Update on Status of Project's Schedule and Cost as of April 27, 2006
Testimony issued by the Government Accountability Office with an abstract that begins "This testimony focuses on the Architect of the Capitol's progress in achieving selected project milestones and in managing the project's schedule since Congress's March 15, 2006, hearing on the project. As part of this discussion, we will address a number of key challenges and risks that continue to face the project, as well as actions AOC has taken or plans to take to address these risks. In addition, we will discuss the status of the project's costs and funding."
Date:
April 27, 2006
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Cold Energy Integration
None
Date:
April 27, 2006
Creator:
Barton, N
Object Type:
Report
System:
The UNT Digital Library
Comanche Chief (Comanche, Tex.), No. 52, Ed. 1 Thursday, April 27, 2006
Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date:
April 27, 2006
Creator:
Wilkerson, James C., III
Object Type:
Newspaper
System:
The Portal to Texas History
The Concentration and Distribution of Depleted Uranium (DU) and Beryllium (Be) in Soil and Air on Illeginni Island at Kwajalein Atoll
Re-entry vehicles on missiles launched at Vandenberg Air Force base in California re-enter at the Western Test Range, the Regan Test Site (RTS) at Kwajalein Atoll. An environmental Assessment (EA) was written at the beginning of the program to assess potential impact of Depleted Uranium (DU) and Beryllium (Be), the major RV materials of interest from a health and environmental perspective. The chemical and structural form of DU and Be in RVs is such that they are insoluble in soil water and sea water. Consequently, residual concentrations of DU and Be observed in soil on the island are not expected to be toxic to plant life because there is essentially no soil to plant uptake. Similarly, due to their insolubility in sea water there is no uptake of either element by marine biota including fish, mollusks, shellfish and sea mammals. No increase in either element has been observed in sea life around Illeginni Island where deposition of DU and Be has occurred. The critical terrestrial exposure pathway for U and Be is inhalation. Concentration of both elements in air over the test period (1989 to 2006) is lower by a factor of 10,000 than the most restrictive U.S. guideline for …
Date:
April 27, 2006
Creator:
Robison, W L; Hamilton, T F; Martinelli, R E; Gouveia, F J; Lindman, T R & Yakuma, S C
Object Type:
Report
System:
The UNT Digital Library
Contract Management: Increased Use of Alaska Native Corporations' Special 8(a) Provisions Calls for Tailored Oversight
A letter report issued by the Government Accountability Office with an abstract that begins "Alaska Native corporations (ANC) were created to settle land claims with Alaska Natives and foster economic development. In 1986, legislation passed that allowed ANCs to participate in the Small Business Administration's (SBA) 8(a) program. Since then, Congress has extended special procurement advantages to 8(a) ANC firms, such as the ability to win sole-source contracts for any dollar amount. This report identifies (1) trends in the government's 8(a) contracting with ANC firms, (2) the reasons agencies have awarded 8(a) sole-source contracts to ANC firms and the facts and circumstances behind some of these contracts, and (3) how ANCs are using the 8(a) program. GAO also evaluated SBA's oversight of 8(a) ANC firms."
Date:
April 27, 2006
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
DART receives boost from U. S. Department of Transportation
News release about DART receiving additional federal funding for its light rail expansion.
Date:
April 27, 2006
Creator:
Lyons, Morgan
Object Type:
Text
System:
The Portal to Texas History
Doctoral Recital: 2006-04-27 – Hsing-Yin (Cherry) Ko, piano
Solo recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree
Date:
April 27, 2006
Creator:
Ko, Hsing-Yin
Object Type:
Sound
System:
The UNT Digital Library
Drinking Water State Revolving Fund: Program Overview and Issues
The Safe Drinking Water Act Amendments of 1996 authorized a drinking water state revolving loan fund program to help public water systems finance infrastructure projects needed to comply with federal drinking water regulations and to protect public health.
Date:
April 27, 2006
Creator:
Tiemann, Mary
Object Type:
Report
System:
The UNT Digital Library
The Dublin Citizen (Dublin, Tex.), Vol. 16, No. 35, Ed. 1 Thursday, April 27, 2006
Weekly newspaper from Dublin, Texas that includes local, state, and national news along with advertising.
Date:
April 27, 2006
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Effect of Unheated Sections on Moisture Transport in the Emplacement Drift
The goals of this study are: (1) to configure a thermal-hydrological, natural-ventilation model for simulating temperature, humidity, and condensate distributions in the coupled domains of in-drift airspace and near-field rockmass. Rokmass model: TOUGH2, in-drift model: MULTIFLUX (MF); (2) obtain meaningful results from the model for a practical application in which the beneficial effects of unheated drift sections are analyzed; and (3) study the sensitivity to the axial dispersion coefficient with the model.
Date:
April 27, 2006
Creator:
Danko, G.; Birkholzer, J. & Bahrami, D.
Object Type:
Article
System:
The UNT Digital Library