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UNT Libraries Government Documents Department
323
UNT Libraries Special Collections
104
Oklahoma Historical Society
48
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12
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7
Alvin Community College
6
National Museum of the Pacific War/Admiral Nimitz Foundation
6
UNT Libraries
6
Gaines County Library
5
Livingston Municipal Library
5
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Collection
Office of Scientific & Technical Information Technical Reports
270
Texas Digital Newspaper Program
119
The Black Academy of Arts and Letters Records
87
Tocker Foundation Grant
71
Oklahoma Digital Newspaper Program
53
Congressional Research Service Reports
37
Government Accountability Office Reports
13
The Baytown Sun
12
KXAS-NBC 5 News Collection
12
Altus Times-Democrat
11
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Serial/Series Title
Folder 4: 9th Annual Christmas/Kwanzaa Featuring Tanya Blount, December 18, 2001
85
The Baytown Sun
12
The Altus Times
11
The Express-Star
11
NBC News Clips
10
Sapulpa Daily Herald
9
The Perry Daily Journal
8
DART News Releases
7
Levelland and Hockley County News-Press
5
Polk County Enterprise
5
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Country
Year
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Day
[People on stage pose for picture]
Photograph of people on stage posing for a picture, taken at the 9th annual Christmas/Kwanzaa Concert featuring Tanya Blount, held by The Black Academy of Arts and Letters, event was held at the Naomi Bruton Theatre in the Dallas Convention Center in Dallas, Texas.
Date:
December 18, 2001
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Woman sings into mic]
Photograph of a woman singing into a mic, taken at the 9th annual Christmas/Kwanzaa Concert featuring Tanya Blount, held by The Black Academy of Arts and Letters, event was held at the Naomi Bruton Theatre in the Dallas Convention Center in Dallas, Texas.
Date:
December 18, 2001
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Woman holding up her arms]
Photograph of a woman holding up her arms, taken at the 9th annual Christmas/Kwanzaa Concert featuring Tanya Blount, held by The Black Academy of Arts and Letters, event was held at the Naomi Bruton Theatre in the Dallas Convention Center in Dallas, Texas.
Date:
December 18, 2001
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Tanya Blount looks a woman singing]
Photograph of Tanya Blount looking at woman singing, taken at the 9th annual Christmas/Kwanzaa Concert featuring Tanya Blount, held by The Black Academy of Arts and Letters, event was held at the Naomi Bruton Theatre in the Dallas Convention Center in Dallas, Texas.
Date:
December 18, 2001
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Conductor looking toward the ground]
Photograph of the conductor looking toward the ground, taken at the 9th annual Christmas/Kwanzaa Concert featuring Tanya Blount, held by The Black Academy of Arts and Letters, event was held at the Naomi Bruton Theatre in the Dallas Convention Center in Dallas, Texas.
Date:
December 18, 2001
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
Cherokeean/Herald (Rusk, Tex.), Vol. 152, No. 35, Ed. 1 Thursday, October 18, 2001
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
October 18, 2001
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
Cherokeean/Herald (Rusk, Tex.), Vol. 151, No. 48, Ed. 1 Thursday, January 18, 2001
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
January 18, 2001
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
The Rambler (Fort Worth, Tex.), Vol. 85, No. 9, Ed. 1 Wednesday, April 18, 2001
Weekly student newspaper from Texas Wesleyan University in Fort Worth, Texas that includes campus and local news along with advertising.
Date:
April 18, 2001
Creator:
Wright, Shelly
Object Type:
Newspaper
System:
The Portal to Texas History
The Rambler (Fort Worth, Tex.), Vol. 86, No. 7, Ed. 1 Thursday, October 18, 2001
Weekly student newspaper from Texas Wesleyan University in Fort Worth, Texas that includes campus and local news along with advertising.
Date:
October 18, 2001
Creator:
Manning, Melanie
Object Type:
Newspaper
System:
The Portal to Texas History
Trade Promotion Authority (Fast-Track): Labor Issues (Including H.R. 3005 and H.R. 3019)
None
Date:
December 18, 2001
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Effects of pressure and saturation on seismic velocities and impedance measurements
Two synthetic data sets were examined to study the possible methods for distinguishing the effects of changes in saturation, and changes in pore pressure, on seismic velocity and impedance measurements. The results show that the results obtained previously on the dependence of laboratory velocity data on changes in saturation carry over without change to the data in these data sets. The assumption in this case is that the only data available are the seismic velocities. This situation can arise in cross-well seismic tomography. Of more direct interest to this project is how these methods and results should change when the data are instead seismic impedance measurements. The main conclusions are that the most appropriate plotting methods for seismic impedance data in order to distinguish changes in saturation, changes in pressure, and saturation changes from pressure changes are ({rho}{mu}, {lambda}/{mu}) and ({mu}/{lambda}, {rho}{mu}{sup 2}/{lambda}). All of these plotting coordinates can be computed easily from the impedance data {rho}{nu}{sub p} and {rho}{nu}{sub s}, since {rho}{mu} = ({rho}{nu}{sub s}){sup 2}, and {rho}{lambda} = ({rho}{nu}{sub p}){sup 2} - 2({rho}{nu}{sub s}){sup 2}, while {lambda}/{mu} = {rho}{lambda}/{rho}{mu} and {rho}{mu}{sup 2}/{lambda} = ({rho}{mu}){sup 2}/{rho}{lambda}. These choices are not the only possibilities, but they seem to give the …
Date:
January 18, 2001
Creator:
Berryman, James G.
Object Type:
Report
System:
The UNT Digital Library
Comparison of Machining with Long-Pulse Green and Ultrashort Pulse Lasers
(1) LLNL measured the material removal rate from stainless steel, silicon carbide, rhenium, N5, hastalloy X, and titanium as a function of pulse fluence at a wavelength of 810 nm for pulse durations of 150 fs, 1.5 ps, 20 ps, and 500 ps. The spot size of the beam used was 150 microns in diameter and the nominal material thickness was 1-2 mm. These experiments were performed on the existing 1 kHz laser system. Holes of different penetration depths were obtained to ascertain change in removal rate as a function of depth. Measurements included electron microscopy of selected samples. (2) The experiments in I were repeated for all materials but select pulse durations with the sample in a vacuum of base pressure 10 mTorr to determine if hole quality and ablation rate is improved. (3) LLNL measured material removal rate from stainless steel, silicon carbide, rhenium, N5, hastalloy X, and titanium as a function of pulse fluence at a wavelength of 532 nm for pulse duration at 200 ns. The spot size of the beam used was 200 microns in diameter and the material thickness was the same as in task I. Holes of different penetration depths were obtained to …
Date:
May 18, 2001
Creator:
Wynne, A E & Stuart, B C
Object Type:
Report
System:
The UNT Digital Library
Army Solid State Laser Program: Design, Operation, and Mission Analysis for a Heat-Capacity Laser
Solid-state lasers have held great promise for the generation of high-average-power, high-quality output beams for a number of decades. However, the inherent difficulty of scaling the active solid-state gain media while continuing to provide efficient cooling has limited demonstrated powers to <5kW. Even at the maximum demonstrated average powers, the output is most often delivered as continuous wave (CW) or as small energy pulses at high pulse repetition frequency (PRF) and the beam divergence is typically >10X the diffraction limit. Challenges posed by optical distortions and depolarization arising from internal temperature gradients in the gain medium of a continuously cooled system are only increased for laser designs that would attempt to deliver the high average power in the form of high energy pulses (>25J) from a single coherent optical aperture. Although demonstrated phase-locking of multiple laser apertures may hold significant promise for the future scaling of solid-state laser systems,1 the continuing need for additional technical development and innovation coupled with the anticipated complexity of these systems effectively limits this approach for near-term multi-kW laser operation outside of a laboratory setting. We have developed and demonstrated a new operational mode for solid-state laser systems in which the cooling of the gain …
Date:
May 18, 2001
Creator:
Dane, C. B.; Flath, L.; Rotter, M.; Fochs, S.; Brase, J. & Bretney, K.
Object Type:
Article
System:
The UNT Digital Library
Engineered Defects for Investigation of Laser-Induced Damage of Fused Silica at 355nm
Embedded gold and mechanical deformation in silica were used to investigate initiation of laser-induced damage at 3.55-nm (7.6 ns). The nanoparticle-covered surfaces were coated with between 0 and 500 nm of SiO{sub 2} by e-beam deposition. The threshold for observable damage and initiation site morphology for these ''engineered'' surfaces was determined. The gold nanoparticle coated surfaces with 500nm SiO{sub 2} coating exhibited pinpoint damage threshold of <0.7 J/cm{sup 2} determined by light scattering and Nomarski microscopy. The gold nanoparticle coated surfaces with the 100nm SiO{sub 2} coatings exhibited what nominally appeared to be film exfoliation damage threshold of 19 J/cm{sup 2} via light scattering and Nomarski microscopy. With atomic force microscopy pinholes could be detected at fluences greater than 7 J/cm{sup 2} and blisters at fluences greater than 3 J/cm{sup 2} on the 100 nm-coated surfaces. A series of mechanical indents and scratches were made in the fused silica substrates using a nano-indentor. Plastic deformation without cracking led to damage thresholds of -25 J/cm{sup 2}, whereas indents and scratches with cracking led to damage thresholds of only {approx}5 J/cm{sup 2}. Particularly illuminating was the deterministic damage of scratches at the deepest end of the scratch, as if the scratch acted …
Date:
December 18, 2001
Creator:
Hamza, A V; Siekhaus, W J; Rubenchik, A M; Feit, M; Chase, L L; Savina, M et al.
Object Type:
Article
System:
The UNT Digital Library
McDade-Murtha Amendment: Ethical Standards for Justice Department Attorneys
None
Date:
December 18, 2001
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Advanced Adaptive Optics Technology Development
The NSF Center for Adaptive Optics (CfAO) is supporting research on advanced adaptive optics technologies. CfAO research activities include development and characterization of micro-electro-mechanical systems (MEMS) deformable mirror (DM) technology, as well as development and characterization of high-resolution adaptive optics systems using liquid crystal (LC) spatial light modulator (SLM) technology. This paper presents an overview of the CfAO advanced adaptive optics technology development activities including current status and future plans.
Date:
September 18, 2001
Creator:
Olivier, S.
Object Type:
Article
System:
The UNT Digital Library
Beam-Target Interaction Experiments for Multipulse Bremsstrahlung Converters Applications
As part of the Dual Axis Radiography Hydrotest Facility, Phase II (DARHT II) multipulse Bremsstrahlung target, we have been performing an investigation of (1) the possible adverse effects of backstreaming ion emission from the Bremsstrahlung converter target and (2) maintaining sufficient target density to ensure dose in latter pulses. Theory predictions show that the first effect would primarily be manifested in the static focusing system as a rapidly varying x-ray spot. From experiments performed on ETA-II, we have shown that the first effect is not strongly present when the beam initially interacts with the target. Electron beam pulses delivered to the target after formation of a plasma are strongly affected, however. Secondly, we have performed studies of the effect of the time varying target density on dose and seek to demonstrate various techniques for maintaining that density. Measurements are presented of the target density as a function of time and are compared with our hydrodynamic models.
Date:
June 18, 2001
Creator:
Sampayan, S.; Buckles, R.; Caporaso, G.; Chambers, F. C.; Chen, Y. J.; Falabella, S. et al.
Object Type:
Article
System:
The UNT Digital Library
[Letter from George Thatcher to Dr. Lanny Hall – January 18, 2001]
Letter from George Thatcher to Dr. Lanny Hall to thank him for the material he sent him regarding his grandfather, Dr. George Oscar Thatcher. George Thatcher encloses several photos in return and describes them in this correspondence.
Date:
January 18, 2001
Creator:
Thatcher, George
Object Type:
Letter
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 128, No. 21, Ed. 1 Thursday, October 18, 2001
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
October 18, 2001
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
[Confirmation Invitation for Ahavath Sholom, 2001]
Invitation for the confirmation exercises for the 2001 class of Ahavath Sholom synagogue, including a list of confirmands.
Date:
May 18, 2001
Creator:
Congregation Ahavath Sholom
Object Type:
Pamphlet
System:
The Portal to Texas History
RHIC 28 MHz Accelerating Cavity System.
The 28 MHz accelerating system consists of a quarter wave cavity driven by an inductively coupled 100kW tetrode amplifer and 1kW solid state driver amplifer. 40dB of rf feedback closed around the cavity and amplifers reduces small perturbations within the loop by a factor of 100, and reduces the time required to shift the phase at transition by a factor of 10, limited by the saturation of the drive chain. The cavity is tuned over a 200kHz range by a mechanical tuner which varies the gap capacitance. Broadband HOM damping is provided by two orthogonal loop coupled high pass filters. Design parameters and commissioning results are presented.
Date:
June 18, 2001
Creator:
Rose, J.; Brennan, J. M.; Campbell, A.; Kwiatkowski, S.; Ratti, A. & Pirkl, W.
Object Type:
Article
System:
The UNT Digital Library
NSLS in-Vacuum Undulators and Mini-Beta Straights.
We review the work carried out in the X13 R&D Straight Section of the NSLS X-Ray Ring on small gap in-vacuum undulators (IVUNs). Then we discuss: (1) plans to replace the pure permanent magnet undulator in X13 by a hybrid design providing stronger magnetic fields, enhancing the tunability of the device; (2) plans to install hybrid IVUNs in the two RF straights of the X-Ray Ring, increasing the number of insertion devices in the XRay Ring to eight; (3) the possibility of reducing the vertical beta function in the X13 straight from 0.33 m down to 0.16 m. This reduction in beta function would allow us to decrease the usable undulator gap from 3mm down to 2mm, further increasing the tuning range.
Date:
June 18, 2001
Creator:
Rakowsky, G.; Lynch, D.; Blum, E.B. & Krinsky, S.
Object Type:
Article
System:
The UNT Digital Library
Longitudinal Measurements and Simulations of Stretched Bunches in the NSLS VUV Ring.
Certain longitudinal instabilities in the stretched bunches of the National Synchrotron Light Source Vacuum Ultra-Violet ring are described and simulated using a code for the integration of the Vlasov-Fokker-Planck equation (these proceedings). Results for the microwave instability driven by broadband impedance, instability driven by high-Q radio-frequency modes, and response functions in stretched bunches, are compared with measurements from the ring.
Date:
June 18, 2001
Creator:
Towne, N.
Object Type:
Article
System:
The UNT Digital Library
High-Gain Harmonic Generation Free-Electron Laser at Saturation.
None
Date:
June 18, 2001
Creator:
Shaftan, T.; Babzien, M.; Ben-Zvi, Ilan; Dimauro, L. F.; Doyuran, A.; Graves, W. et al.
Object Type:
Article
System:
The UNT Digital Library