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Current Performance of the SLD VXD3
During 1996, the SLD collaboration completed construction and began operation of a new charge-coupled device (CCD) vertex detector (VXD3). Since then, its performance has been studied in detail and a new topological vertexing technique has been developed. In this paper, we discuss the design of VXD3, procedures for aligning it, and the tracking and vertexing improvements that have led to its world-record performance.
Date:
September 14, 1999
Creator:
Abe, Toshinori
Object Type:
Report
System:
The UNT Digital Library
[RE: Arts Education Assessment Consortium, September 14, 1994]
Photocopy of a letter from Julie Abel, the Getty Center, to the Regional Institute Directors, in regards to the upcoming arts assessment. The Arts Education Assessment Consortium, AEAC, is administered by the Council of Chief State School Officers to all the RIG states. The Center is providing support to the AEAC to develop assessment prototypes in the visual and performing arts and believes that if the DBAE, discipline-based art education, is embedded in the assessment prototypes it will strengthen the impact within the state and nationally. A list of state contacts is attached to the letter.
Date:
September 14, 1994
Creator:
Abel, Julie
Object Type:
Letter
System:
The UNT Digital Library
[E-mail from Julie Anne Abel to D. Jack Davis and R. William McCarter, September 14, 1994]
An e-mail from Julie Anne Abel to D. Jack Davis and R. William McCarter about informing them that the Getty Center for Education in the Arts has approved their National Specialty Program development grant. Attached document is a budget.
Date:
September 14, 1994
Creator:
Abel, Julie Anne
Object Type:
Letter
System:
The UNT Digital Library
Observation of Two-Neutrino Double-Beta Decay in Xe-136 with EXO-200
We report the observation of two-neutrino double-beta decay in {sup 136}Xe with T{sub 1/2} = 2.11 {+-} 0.04(stat) {+-} 0.21(syst) x 10{sup 21} yr. This second-order process, predicted by the standard model, has been observed for several nuclei but not for {sup 136}Xe. The observed decay rate provides new input to matrix element calculations and to the search for the more interesting neutrinoless double-beta decay, the most sensitive probe for the existence of Majorana particles and the measurement of the neutrino mass scale.
Date:
September 14, 2012
Creator:
Ackerman, N.; Aharmim, B.; Auger, M.; Auty, D. J.; Barbeau, P. S.; Barry, K. et al.
Object Type:
Article
System:
The UNT Digital Library
Constraining Dark Matter Models from a Combined Analysis of Milky Way Satellites with the Fermi Large Area Telescope
Satellite galaxies of the Milky Way are among the most promising targets for dark matter searches in gamma rays. We present a search for dark matter consisting of weakly interacting massive particles, applying a joint likelihood analysis to 10 satellite galaxies with 24 months of data of the Fermi Large Area Telescope. No dark matter signal is detected. Including the uncertainty in the dark matter distribution, robust upper limits are placed on dark matter annihilation cross sections. The 95% confidence level upper limits range from about 10{sup -26} cm{sup 3} s{sup -1} at 5 GeV to about 5 x 10{sup -23} cm{sup 3} s{sup -1} at 1 TeV, depending on the dark matter annihilation final state. For the first time, using gamma rays, we are able to rule out models with the most generic cross section ({approx}3 x 10{sup -26} cm{sup 3} s{sup -1} for a purely s-wave cross section), without assuming additional boost factors.
Date:
September 14, 2012
Creator:
Ackermann, M.; Ajello, M.; Albert, A.; Atwood, W. B.; Baldini, L.; Ballet, J. et al.
Object Type:
Article
System:
The UNT Digital Library
The High Temperature, High Vacuum Vaporization and Thermodynamic Properties of Uranium Dioxide
None
Date:
September 14, 1955
Creator:
Ackermann, R. J.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Mineola Monitor (Mineola, Tex.), Vol. 50, No. 28, Ed. 1 Thursday, September 14, 1922
Weekly newspaper from Mineola, Texas that includes local, state and national news along with advertising.
Date:
September 14, 1922
Creator:
Adair, H. J.
Object Type:
Newspaper
System:
The Portal to Texas History
The Forgan Advocate (Forgan, Okla.), Vol. 6, No. 48, Ed. 1 Thursday, September 14, 1933
Weekly newspaper from Forgan, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 14, 1933
Creator:
Adams, Aline
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Pawhuska Daily Journal-Capital (Pawhuska, Okla.), Vol. 73, No. 182, Ed. 1 Tuesday, September 14, 1982
Daily newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 14, 1982
Creator:
Adams, Bill
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Tank Characterization Report for Double Shell Tank 241AZ102
None
Date:
September 14, 2000
Creator:
Adams, M. R.
Object Type:
Report
System:
The UNT Digital Library
The Paducah Post (Paducah, Tex.), Vol. 82, No. 30, Ed. 1 Wednesday, September 14, 1988
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
September 14, 1988
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
Convair Report to Supervision, Number 1009, September 14, 1977
Newsletter written for supervisors working at the Convair Division in Fort Worth containing news about events and activities, workplace reminders, and other relevant information.
Date:
September 14, 1977
Creator:
Adams, Richard E.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Forney Tribune. (Forney, Tex.), Vol. 4, No. 14, Ed. 1 Wednesday, September 14, 1892
Weekly newspaper from Forney, Texas that includes local, state, and national news along with advertising.
Date:
September 14, 1892
Creator:
Adams, Walter D.
Object Type:
Newspaper
System:
The Portal to Texas History
Investigation of Downwash, Sidewash, and Mach Number Distribution Behind a Rectangular Wing at a Mach Number of 2.41
"An investigation of the nature of the flow field behind a rectangular circular-arc wing has been conducted in the Langley 9-inch supersonic tunnel. Pitot- and static-pressure surveys covering a region of flow behind the wing have been made together with detailed pitot surveys throughout the region of the wake. In addition, the flow direction has been measured using a weathercocking vane measurements. Theoretical calculations of the variation of both downwash and sidewash with angle of attack using Lagerstrom's superposition method have been made" (p. 1).
Date:
September 14, 1950
Creator:
Adamson, D. & Boatright, William B.
Object Type:
Report
System:
The UNT Digital Library
Investigation of Downwash, Sidewash, and Mach Number Distribution Behind a Rectangular Wing at a Mach Number of 2.41
"An investigation of the nature of the flow field behind a rectangular wing of circular arc cross section has been conducted in the Langley 9-inch supersonic tunnel. Pitot- and static-pressure surveys covering a region of flow behind the wing have been made together with detailed pitot surveys throughout the region of the wake. In addition, the flow direction has been measured by means of a weathercocking vane. Theoretical calculations have been made to obtain the variation of both downwash and sidewash with angle of attack by using the superposition method of Lagerstrom, Graham, and Grosslight" (p. 1).
Date:
September 14, 1950
Creator:
Adamson, David & Boatright, William B.
Object Type:
Report
System:
The UNT Digital Library
The Edmond Enterprise (Edmond, Okla.), Vol. 22, No. 33, Ed. 1 Thursday, September 14, 1922
Weekly newspaper from Edmond, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 14, 1922
Creator:
Adamson, Royce B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Pawhuska Daily Journal-Capital (Pawhuska, Okla.), Vol. 71, No. 185, Ed. 1 Sunday, September 14, 1980
Daily newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 14, 1980
Creator:
Adkisson, Larry R.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Phase 1 sampling and analysis plan for the 304 Concretion Facility closure activities
This document provides guidance for the initial (Phase 1) sampling and analysis activities associated with the proposed Resource Conservation and Recovery Act of 1976 (RCRA) clean closure of the 304 Concretion Facility. Over its service life, the 304 Concretion Facility housed the pilot plants associated with cladding uranium cores, was used to store engineering equipment and product chemicals, was used to treat low-level radioactive mixed waste, recyclable scrap uranium generated during nuclear fuel fabrication, and uranium-titanium alloy chips, and was used for the repackaging of spent halogenated solvents from the nuclear fuels manufacturing process. The strategy for clean closure of the 304 Concretion Facility is to decontaminate, sample (Phase 1 sampling), and evaluate results. If the evaluation indicates that a limited area requires additional decontamination for clean closure, the limited area will be decontaminated, resampled (Phase 2 sampling), and the result evaluated. If the evaluation indicates that the constituents of concern are below action levels, the facility will be clean closed. Or, if the evaluation indicates that the constituents of concern are present above action levels, the condition of the facility will be evaluated and appropriate action taken. There are a total of 37 sampling locations comprising 12 concrete core, …
Date:
September 14, 1994
Creator:
Adler, J. G.
Object Type:
Report
System:
The UNT Digital Library
Gravitomagnetism and Spinor Quantum Mechanics
We give a systematic treatment of a spin 1=2 particle in a combined electromagnetic field and a weak gravitational field that is produced by a slowly moving matter source. This paper continues previous work on a spin zero particle, but it is largely self-contained and may serve as an introduction to spinors in a Riemann space. The analysis is based on the Dirac equation expressed in generally covariant form and coupled minimally to the electromagnetic field. The restriction to a slowly moving matter source, such as the earth, allows us to describe the gravitational field by a gravitoelectric (Newtonian) potential and a gravitomagnetic (frame-dragging) vector potential, the existence of which has recently been experimentally verified. Our main interest is the coupling of the orbital and spin angular momenta of the particle to the gravitomagnetic field. Specifically we calculate the gravitational gyromagnetic ratio as g{sub g} = 1 ; this is to be compared with the electromagnetic gyromagnetic ratio of g{sub e} = 2 for a Dirac electron.
Date:
September 14, 2012
Creator:
Adler, Ronald J.; /Stanford U., HEPL /San Francisco State U.; Chen, Pisin; /Taiwan, Natl. Taiwan U. /KIPAC, Menlo Park /SLAC; Varani, Elisa & /Unlisted
Object Type:
Article
System:
The UNT Digital Library
The Oilton Gusher (Oilton, Okla.), Vol. 7, No. 15, Ed. 1 Thursday, September 14, 1922
Weekly newspaper from Oilton, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 14, 1922
Creator:
Admire, Eli L.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Wakefield and Beam Centering Measurements of a Damped and Detuned X-Band Accelerator Structure
In the Next Linear Collider (NLC) design, X-Band (11.4 GHz) accelerator structures are used to accelerate multibunch beams to several hundred GeV. Although these structures allow for high gradient operation, their strong deflecting modes impose a number of operational constraints. In particular, the long-range transverse wakefields generated by the bunches need to be reduced by about two orders of magnitude to prevent significant beam breakup. During the past five years, a reduction scheme that employs both detuning and damping of the structure dipole modes has been developed to meet this requirement. Several prototype Damped and Detuned Structures (DDS) have been built to test and refine this scheme. The wakefield of the latest version, DDS3, has recently been measured in the Accelerator Structure Setup (ASSET) facility at SLAC. In this paper, we present these results together with predictions based on an equivalent circuit model of the structure. We also present ASSET studies in which the beam-induced dipole signals that are coupled out for damping purposes are used to center the beam in the structure.
Date:
September 14, 1999
Creator:
Adolphsen, Chris
Object Type:
Report
System:
The UNT Digital Library
The Future of the Eurozone and U.S. Interests
This report details the consequences of the European financial crisis of 2010 beginning with the economic fallout of the Greek economy. It then highlights six factors that would be instrumental regarding the "Eurozones" future.
Date:
September 14, 2010
Creator:
Ahearn, Raymond J.; Jackson, James K.; Nelson, Rebecca M. & Weiss, Martin A.
Object Type:
Report
System:
The UNT Digital Library
Fermi Large Area Telescope Observations of the Supernova Remnant G8.7-0.1
We present a detailed analysis of the GeV gamma-ray emission toward the supernova remnant (SNR) G8.7-0.1 with the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope. An investigation of the relationship between G8.7-0.1 and the TeV unidentified source HESS J1804-216 provides us with an important clue on diffusion process of cosmic rays if particle acceleration operates in the SNR. The GeV gamma-ray emission is extended with most of the emission in positional coincidence with the SNR G8.7-0.1 and a lesser part located outside the western boundary of G8.7-0.1. The region of the gamma-ray emission overlaps spatially connected molecular clouds, implying a physical connection for the gamma-ray structure. The total gamma-ray spectrum measured with LAT from 200 MeV-100 GeV can be described by a broken power-law function with a break of 2.4 {+-} 0.6 (stat) {+-} 1.2 (sys) GeV, and photon indices of 2.10 {+-} 0.06 (stat) {+-} 0.10 (sys) below the break and 2.70 {+-} 0.12 (stat) {+-} 0.14 (sys) above the break. Given the spatial association among the gamma rays, the radio emission of G8.7-0.1, and the molecular clouds, the decay of p0s produced by particles accelerated in the SNR and hitting the molecular clouds naturally …
Date:
September 14, 2012
Creator:
Ajello, M.; Allafort, A.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Development Of A Novel Catalyst For No Decomposition
Air pollution arising from the emission of nitrogen oxides as a result of combustion taking place in boilers, furnaces and engines, has increasingly been recognized as a problem. New methods to remove NO{sub x} emissions significantly and economically must be developed. The current technology for post-combustion removal of NO is the selective catalytic reduction (SCR) of NO by ammonia or possibly by a hydrocarbon such as methane. The catalytic decomposition of NO to give N2 will be preferable to the SCR process because it will eliminate the costs and operating problems associated with the use of an external reducing species. The most promising decomposition catalysts are transition metal (especially copper)-exchanged zeolites, perovskites, and noble metals supported on metal oxides such as alumina, silica, and ceria. The main shortcoming of the noble metal reducible oxide (NMRO) catalysts is that they are prone to deactivation by oxygen. It has been reported that catalysts containing tin oxide show oxygen adsorption behavior that may involve hydroxyl groups attached to the tin oxide. This is different than that observed with other noble metal-metal oxide combinations, which have the oxygen adsorbing on the noble metal and subsequently spilling over to the metal oxide. This observation leads …
Date:
September 14, 2006
Creator:
Akyurtlu, Ates & Akyurtlu, Jale F.
Object Type:
Report
System:
The UNT Digital Library