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72,022 Matching Results

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Results: 1 - 24 of 72,022 next
Best Match Title Creator Date Created (Newest) Date Created (Oldest) Date Added (Newest) Date Added (Oldest)
[Invoice for Repairs by A. J. Warren Plumbing & Heating, December 1958] (open access)

[Invoice for Repairs by A. J. Warren Plumbing & Heating, December 1958]

Invoice for services by A. J. Warren Plumbing and Heating for Mrs. D. W. Kempner, including repair water pipe through foundation and riser in yard worth $29.75. Paid by check on January 14th, 1959.
Date: December 2, 1958
Creator: A. J. Warren Plumbing and Heating
Object Type: Text
System: The Portal to Texas History
[Federal Building with Crane]

[Federal Building with Crane]

Photograph of the North side of the Brownsville U.S. court house and post office, a large four-story brick and stone building with three rows of rectangular windows and thee archways in the middle of the ground floor. There is a crane next to it on the right and on the left there is a long temporary structure running parallel to the road.
Date: September 2, 1932
Creator: A. Rogers Studio
Object Type: Photograph
System: The Portal to Texas History
[U.S. Court House in Brownsville]

[U.S. Court House in Brownsville]

Photograph of construction on the U.S. court house and post office, a four-story brick building, taken from across the street. The pavement in front of the building is torn up with some wooden scaffolding visible on the right and in the foreground several workers can be seen sitting on the sidewalk on the other side of the street. On the left part of a storefront can be seen and there are several street lamps and telephone lines visible in front of the building.
Date: September 2, 1932
Creator: A. Rogers Studio
Object Type: Photograph
System: The Portal to Texas History
Proceedings of RIKEN BNL Research Center Workshop: Initial State Fluctuations and Final-State Particle Correlations (open access)

Proceedings of RIKEN BNL Research Center Workshop: Initial State Fluctuations and Final-State Particle Correlations

N/A
Date: February 2, 2011
Creator: A., Dumitru; Molnar, D. & Wang, F.
Object Type: Report
System: The UNT Digital Library
Pump Side-scattering in Ultra-powerful Backward Raman Amplifiers (open access)

Pump Side-scattering in Ultra-powerful Backward Raman Amplifiers

Extremely large laser power might be obtained by compressing laser pulses through backward Raman amplification (BRA) in plasmas. Premature Raman backscattering of a laser pump by plasma noise might be suppressed by an appropriate detuning of the Raman resonance, even as the desired amplification of the seed persists with a high efficiency. In this paper, we analyze side-scattering of laser pumps by plasma noise in backward Raman amplifiers. Though its growth rate is smaller than that of backscattering, the side-scattering can nevertheless be dangerous, because of a longer path of side-scattered pulses in plasmas and because of an angular dependence of the Raman resonance detuning. We show that side-scattering of laser pumps by plasma noise in BRA might be suppressed to a tolerable level at all angles by an appropriate combination of two detuning mechanisms associated with plasma density gradient and pump chirp.
Date: March 2, 2004
Creator: A.A. Solodov, V.M. Malkin, and N.J. Fisch
Object Type: Report
System: The UNT Digital Library
B Plant Complex preclosure work plan (open access)

B Plant Complex preclosure work plan

This preclosure work plan describes the condition of the dangerous waste treatment storage, and/or disposal (TSD) unit after completion of the B Plant Complex decommissioning Transition Phase preclosure activities. This description includes waste characteristics, waste types, locations, and associated hazards. The goal to be met by the Transition Phase preclosure activities is to place the TSD unit into a safe and environmentally secure condition for the long-term Surveillance and Maintenance (S&M) Phase of the facility decommissioning process. This preclosure work plan has been prepared in accordance with Section 8.0 of the Hanford Federal Facility Agreement and Consent Order (Tri-Party Agreement) (Ecology et al. 1996). The preclosure work plan is one of three critical Transition Phase documents, the other two being: B Plant End Points Document (WHC-SD-WM-TPP-054) and B Plant S&M plan. These documents are prepared by the U.S. Department of Energy, Richland Operations Office (DOE-RL) and its contractors with the involvement of Washington State Department of Ecology (Ecology). The tanks and vessels addressed by this preclosure work plan are limited to those tanks end vessels included on the B Plant Complex Part A, Form 3, Permit Application (DOE/RL-88-21). The criteria for determining which tanks or vessels are in the Part …
Date: February 2, 1999
Creator: ADLER, J.G.
Object Type: Report
System: The UNT Digital Library
[Letter: From Robert E. Hensley to Frank Wise] (open access)

[Letter: From Robert E. Hensley to Frank Wise]

A letter from Robert E. Hensley, at the AIDS Interfaith Network, to Frank Wise, Dallas Parks Director, offering his support of the proposed AIDS Memorial project for Robert E. Lee Park.
Date: February 2, 1990
Creator: AIDS Interfaith Network Inc.
Object Type: Letter
System: The UNT Digital Library
Development of An On-Line, Core Power Distribution Monitoring System (open access)

Development of An On-Line, Core Power Distribution Monitoring System

The objective of the proposed work was to develop a software package that can construct in three-dimensional core power distributions using the signals from constant temperature power sensors distributed in the reactor core. The software developed uses a mode-based state/parameter estmation technique that is particularly attractive when there are model uncertainties and/or large signal noise. The software yields the expected value of local power at the detector locations and points in between, as well as the probability distribution of the local power density
Date: October 2, 2007
Creator: ALdemir, Tunc; Miller, Don & Wang, Peng
Object Type: Report
System: The UNT Digital Library
THE FUTURE OF SPIN PHYSICS AT BNL. (open access)

THE FUTURE OF SPIN PHYSICS AT BNL.

The Relativistic Heavy Ion Collider (RHIC) at BNL is the world's only polarized proton-proton collider. Collisions at center-of-mass energies up to 500 GeV and beam polarizations approaching 70% (longitudinal or transverse) are provided to two experiments, STAR and PHENIX, at luminosities {ge} 10{sup 32}/cm{sup 2}/sec. Transverse polarized beam has also been provided to the BRAHMS experiment. Measurements that bear on the important question of the spin content of the nucleon are beginning to appear. Over the next 10 years, as the performance of polarized proton running at RHIC is further developed, the Spin Physics program at RHIC will provide definitive measurements of the contributions to the proton's spin of the gluon, the sea quarks and the orbital motion of the partons in the proton's wave function. We plan to extend the reach of our study of the role of spin in QCD with the development of ''eRHIC'', which will provide polarized e-p collisions to a new detector.
Date: October 2, 2006
Creator: ARONSON, S. & DESHPANDE, A.
Object Type: Article
System: The UNT Digital Library
Laser Safety Evaluation of the MILES and Mini MILES Laser Emitting Components (open access)

Laser Safety Evaluation of the MILES and Mini MILES Laser Emitting Components

Laser safety evaluation and output emission measurements were performed (during October and November 2001) on SNL MILES and Mini MILES laser emitting components. The purpose, to verify that these components, not only meet the Class 1 (eye safe) laser hazard criteria of the CDRH Compliance Guide for Laser Products and 21 CFR 1040 Laser Product Performance Standard; but also meet the more stringent ANSI Std. z136.1-2000 Safe Use of Lasers conditions for Class 1 lasers that govern SNL laser operations. The results of these measurements confirmed that all of the Small Arms Laser Transmitters, as currently set (''as is''), meet the Class 1 criteria. Several of the Mini MILES Small Arms Transmitters did not. These were modified and re-tested and now meet the Class 1 laser hazard criteria. All but one System Controllers (hand held and rifle stock) met class 1 criteria for single trigger pulls and all presented Class 3a laser hazard levels if the trigger is held (continuous emission) for more than 5 seconds on a single point target. All units were Class 3a for ''aided'' viewing. These units were modified and re-tested and now meet the Class 1 hazard criteria for both ''aided'' as well as ''unaided'' …
Date: February 2, 2002
Creator: AUGUSTONI, ARNOLD L.
Object Type: Report
System: The UNT Digital Library
Jet Mass and Substructure of Inclusive Jets in $\sqrt{s}=7$ TeV $Pp$ Collisions with the ATLAS Experiment (open access)

Jet Mass and Substructure of Inclusive Jets in $\sqrt{s}=7$ TeV $Pp$ Collisions with the ATLAS Experiment

None
Date: April 2, 2013
Creator: Aad, Georges
Object Type: Article
System: The UNT Digital Library
Search for New Bottomlike Quark Pair Decays Q Q-Bar to (T W- ) (T-Bar W -) in Same-Charge Dilepton Events (open access)

Search for New Bottomlike Quark Pair Decays Q Q-Bar to (T W- ) (T-Bar W -) in Same-Charge Dilepton Events

We report the most restrictive direct limits on masses of fourth-generation down-type quarks b{prime}, and quark-like composite fermions (B or T{sub 5/3}), decaying promptly to tW{sup {-+}}. We search for a significant excess of events with two same-charge leptons (e, {mu}), several hadronic jets, and missing transverse energy. An analysis of data from p{bar p} collisions with an integrated luminosity of 2.7 fb{sup -1} collected with the CDF II detector at Fermilab yields no evidence for such a signal, setting mass limits m{sub b{prime}}, m{sub B} > 338 GeV/c{sup 2} and m{sub T{sub 5/3}} > 365 GeV/c{sup 2} at 95% confidence level.
Date: April 2, 2012
Creator: Aaltonen, T.; Adelman, J.; Alvarez Gonzalez, B.; Amerio, S.; Amidei, D.; Anastassov, A. et al.
Object Type: Article
System: The UNT Digital Library
Experimental Investigation of the Root Cause Mechanism and Effectiveness of Mitigating Actions for Axial Offset Anomaly in Pressurized Water Reactors (open access)

Experimental Investigation of the Root Cause Mechanism and Effectiveness of Mitigating Actions for Axial Offset Anomaly in Pressurized Water Reactors

Axial offset anomaly (AOA) in pressurized water reactors refers to the presence of a significantly larger measured negative axial offset deviation than predicted by core design calculations. The neutron flux depression in the upper half of high-power rods experiencing significant subcooled boiling is believed to be caused by the concentration of boron species within the crud layer formed on the cladding surface. Recent investigations of the root-cause mechanism for AOA [1,2] suggest that boron build-up on the fuel is caused by precipitation of lithium metaborate (LiBO2) within the crud in regions of subcooled boiling. Indirect evidence in support of this hypothesis was inferred from operating experience at Callaway, where lithium return and hide-out were, respectively, observed following power reductions and power increases when AOA was present. However, direct evidence of lithium metaborate precipitation within the crud has, heretofore, not been shown because of its retrograde solubility. To this end, this investigation has been undertaken in order to directly verify or refute the proposed root-cause mechanism of AOA, and examine the effectiveness of possible mitigating actions to limit its impact in high power PWR cores.
Date: July 2, 2005
Creator: Abdel-Khalik, Said
Object Type: Report
System: The UNT Digital Library
Fermi LAT Observations of LS I +61 303: First Detection of an Orbital Modulation in GeV Gamma Rays (open access)

Fermi LAT Observations of LS I +61 303: First Detection of an Orbital Modulation in GeV Gamma Rays

This Letter presents the first results from the observations of LS I +61{sup o}303 using Large Area Telescope data from the Fermi Gamma-Ray Space Telescope between 2008 August and 2009 March. Our results indicate variability that is consistent with the binary period, with the emission being modulated at 26.6 {+-} 0.5 days. This constitutes the first detection of orbital periodicity in high-energy gamma rays (20 MeV-100 GeV, HE). The light curve is characterized by a broad peak after periastron, as well as a smaller peak just before apastron. The spectrum is best represented by a power law with an exponential cutoff, yielding an overall flux above 100 MeV of 0.82 {+-} 0.03(stat) {+-} 0.07(syst) 10{sup -6} ph cm{sup -2} s{sup -1}, with a cutoff at 6.3 {+-} 1.1(stat) {+-} 0.4(syst) GeV and photon index {Gamma} = 2.21 {+-} 0.04(stat) {+-} 0.06(syst). There is no significant spectral change with orbital phase. The phase of maximum emission, close to periastron, hints at inverse Compton scattering as the main radiation mechanism. However, previous very high-energy gamma ray (>100 GeV, VHE) observations by MAGIC and VERITAS show peak emission close to apastron. This and the energy cutoff seen with Fermi suggest that the link …
Date: April 2, 2012
Creator: Abdo, A. A.; Ackermann, M.; Ajello, M.; Atwood, W. B.; Axelsson, M.; Baldini, L. et al.
Object Type: Article
System: The UNT Digital Library
Constraints on Cosmological Dark Matter Annihilation from the Fermi-LAT Isotropic Diffuse Gamma-Ray Measurement (open access)

Constraints on Cosmological Dark Matter Annihilation from the Fermi-LAT Isotropic Diffuse Gamma-Ray Measurement

None
Date: July 2, 2013
Creator: Abdo, A. A.; Ackermann, M.; Ajello, M.; Baldini, L.; Ballet, J.; Barbiellini, G. et al.
Object Type: Article
System: The UNT Digital Library
Effective and efficient optics inspection approach using machine learning algorithms (open access)

Effective and efficient optics inspection approach using machine learning algorithms

The Final Optics Damage Inspection (FODI) system automatically acquires and utilizes the Optics Inspection (OI) system to analyze images of the final optics at the National Ignition Facility (NIF). During each inspection cycle up to 1000 images acquired by FODI are examined by OI to identify and track damage sites on the optics. The process of tracking growing damage sites on the surface of an optic can be made more effective by identifying and removing signals associated with debris or reflections. The manual process to filter these false sites is daunting and time consuming. In this paper we discuss the use of machine learning tools and data mining techniques to help with this task. We describe the process to prepare a data set that can be used for training and identifying hardware reflections in the image data. In order to collect training data, the images are first automatically acquired and analyzed with existing software and then relevant features such as spatial, physical and luminosity measures are extracted for each site. A subset of these sites is 'truthed' or manually assigned a class to create training data. A supervised classification algorithm is used to test if the features can predict the …
Date: November 2, 2010
Creator: Abdulla, G.; Kegelmeyer, L.; Liao, Z. & Carr, W.
Object Type: Article
System: The UNT Digital Library
Electricity: The Road Toward Restructuring (open access)

Electricity: The Road Toward Restructuring

The Public Utility Holding Company Act of 1935 (PUHCA) and the Federal Power Act (FPA) were enacted to eliminate unfair practices and other abuses by electricity and gas holding companies by requiring federal control and regulation of interstate public utility holding companies. Comprehensive energy legislation has passed the House and Senate. The House passed H.R. 6 on April 11, 2003. On July 31, 2003, the Senate suspended debate on S. 14, inserted the text of H.R. 4 (107th Congress) as a substitute, and passed H.R. 6. A conference agreement was reached November 17, 2003, and passed by the House the next day. H.R. 6 includes an electricity title that would, in part, repeal PUHCA, would prospectively repeal the mandatory purchase requirement under PURPA, and would create an electric reliability organization. On June 15, 2004, H.R. 4503, a comprehensive energy policy bill, passed the House.
Date: May 2, 2003
Creator: Abel, Amy & Parker, Larry
Object Type: Report
System: The UNT Digital Library
[Letter from Julie Abel to Nancy Berry and Jack Davis, July 2, 1996] (open access)

[Letter from Julie Abel to Nancy Berry and Jack Davis, July 2, 1996]

Letter acknowledging the received financial report on the Getty Center for Education in the Arts' FY95 NSPD grant, and requesting a report of interest earned for future statements. Also included is an approved funding request. In this file are two copies of the same letter.
Date: July 2, 1996
Creator: Abel, Julie
Object Type: Letter
System: The UNT Digital Library
[Letter from Julie Anne Abel to D. Jack Davis, June 2, 1994] (open access)

[Letter from Julie Anne Abel to D. Jack Davis, June 2, 1994]

A letter from Julie Anne Abel, Program Associate for The Getty Center for Education in the Arts, to D. Jack Davis, Vice Provost at the University of North Texas and Co-Director of the North Texas Institute for Educators on the Visual Arts, about an enclosed signed copy of The Getty Center March 31, 1994 agreement with UNT on behalf of NTIEVA. Mary Day, Mark Elder, R. William McCarter and Vicki Rosenberg are cc'd at the bottom of the document. In a second letter from Leilani Lattin Duke informs Davis, Elder and McCarter that the Center has agreed to provide a $800 to NTIEVA for the "All Participants' Day Video Teleconference".
Date: June 2, 1994
Creator: Abel, Julie Anne
Object Type: Letter
System: The UNT Digital Library
The Citizens Journal (Atlanta, Tex.), Ed. 1 Thursday, November 2, 1978 (open access)

The Citizens Journal (Atlanta, Tex.), Ed. 1 Thursday, November 2, 1978

Weekly newspaper from Atlanta, Texas that includes local, state and national news along with extensive advertising.
Date: November 2, 1978
Creator: Abeles, Neil
Object Type: Newspaper
System: The Portal to Texas History
Global polarization measurement in Au+Au collisions (open access)

Global polarization measurement in Au+Au collisions

The system created in non-central relativisticnucleus-nucleus collisions possesses large orbital angular momentum. Dueto spin-orbit coupling, particles produced in such a system could becomeglobally polarized along the direction of the system angular momentum. Wepresent the results of Lambda and anti-Lambda hyperon global polarizationmeasurements in Au+Au collisions at sqrt sNN=62.4 GeV and 200 GeVperformed with the STAR detector at RHIC. The observed globalpolarization of Lambda and anti-Lambda hyperons in the STAR acceptance isconsistent with zero within the precision of the measurements. Theobtained upper limit, lbar P Lambda, anti-Lambda rbar<= 0.02, iscompared to the theoretical values discussed recently in theliterature.
Date: August 2, 2007
Creator: Abelev, B. I.; Adams, J.; Aggarwal, M. M.; Ahammed, Z.; Amonett, J.; Anderson, B. D. et al.
Object Type: Article
System: The UNT Digital Library
Measurement of Transverse Single-Spin Asymmetries for Di-JetProduction in Proton-Proton Collisions at sqrt s = 200 GeV (open access)

Measurement of Transverse Single-Spin Asymmetries for Di-JetProduction in Proton-Proton Collisions at sqrt s = 200 GeV

We report the first measurement of the opening angledistribution between pairs of jets produced in high-energy collisions oftransversely polarized protons. The measurement probes (Sivers)correlations between the transverse spin orientation of a proton and thetransverse momentum directions of its partons. With both beams polarized,the wide pseudorapidity (-1 leq eta leq +2) coverage for jets permitsseparation of Sivers functions for the valence and sea regions. Theresulting asymmetries are all consistent with zero and considerablysmaller than Sivers effects observed in semi-inclusive deep inelasticscattering (SIDIS). We discuss theoretical attempts to reconcile the newresults with the sizable transverse spin effects seen in SIDIS andforward hadron production in pp collisions.
Date: October 2, 2007
Creator: Abelev, B. I.; Adams, J.; Aggarwal, M. M.; Ahammed, Z.; Amonett, J.; Anderson, B. D. et al.
Object Type: Article
System: The UNT Digital Library
Inductively Coupled Plasma Etching of III-V Semiconductors in BCl(3)-Based Chemistries: Part II: InP, InGaAs, InGaAsP, InAs and AllnAs (open access)

Inductively Coupled Plasma Etching of III-V Semiconductors in BCl(3)-Based Chemistries: Part II: InP, InGaAs, InGaAsP, InAs and AllnAs

A parametric study of etch rates and surface morphologies of In-containing compound semiconductors (InP, InGaAs, InGaAsP, InAs and AlInAs) obtained by BClj-based Inductively Coupled Plasmas is reported. Etch rates in the range 1,500-3,000 &min. are obtained for all the materials at moderate source powers (500 W), with the rates being a strong function of discharge composition, rf chuck power and pressure. Typical root-mean-square surface roughness of-5 nm were obtained for InP, which is worse than the values obtained for Ga-based materials under the same conditions (-1 run). The near surface of etched samples is typically slightly deficient in the group V element, but the depth of this deficiency is small (a few tens of angstroms).
Date: December 2, 1998
Creator: Abernathy, C.R.; Han, J.; Hobson, W.S.; Hong, J.; Lambers, E.S.; Lee, J.W. et al.
Object Type: Article
System: The UNT Digital Library
[Abilene Board of Commissioners Minutes: 1947-1951] (open access)

[Abilene Board of Commissioners Minutes: 1947-1951]

Ledger containing minutes of the city Board of Commissioners in Abilene, Texas documenting the group's discussions and activities from May 2, 1947 to April 26, 1951. An index with names is included at the front.
Date: 1947-05-02/1951-04-26
Creator: Abilene (Tex.)
Object Type: Book
System: The Portal to Texas History