Degree Department

Degree Discipline

Degree Level

Language

First Run II Measurement of the W Boson Mass (open access)

First Run II Measurement of the W Boson Mass

We describe a measurement of the W boson mass m{sub W} using 200 pb{sup -1} of {radical}s = 1.96 TeV p{bar p} collision data taken with the CDF II detector. With a sample of 63,964 W {yields} e{nu} candidates and 51,128 W {yields} {mu}{nu} candidates, we measure m{sub W} = [80.413 {+-} 0.034(stat.) {+-} 0.034 (sys.) = 80.413 {+-} 0.048] GeV/c{sup 2}. This is the single most precise m{sub W} measurement to date. When combined with other measured electroweak parameters, this result further constrains the properties of new unobserved particles coupling to W and Z bosons.
Date: August 1, 2007
Creator: Aaltonen, T.; Abulencia, A.; Adelman, J.; Akimoto, T.; Albrow, Michael G.; Alvarez Gonzalez, B. et al.
Object Type: Article
System: The UNT Digital Library
Search for flavor-changing-neutral-current D meson decays (open access)

Search for flavor-changing-neutral-current D meson decays

We study the flavor-changing-neutral-current process c {yields} u{mu}{sup +}{mu}{sup -} using 1.3 fb{sup -1} of p{bar p} collisions at {radical}s = 1.96 TeV recorded by the D0 detector operating at the Fermilab Tevatron Collider. We see clear indications of the D{sup +}{sub s} and D{sup +} {yields} {phi}{pi}{sup +} {yields} {mu}{sup +}{mu}{sup -}{pi}{sup +} final states with significance greater than four standard deviations above background for the D{sup +} state. We search for the continuum decay of D{sup +} {yields} {pi}{sup +}{mu}{sup +}{mu}{sup -} in the dimuon invariant mass spectrum away from the {phi} resonance. We see no evidence of signal above background and set a limit of B(D{sup +} {yields} {pi}{sup +}{mu}{sup +}{mu}{sup -}) < 3.9 x 10{sup -6} at the 90% CL. This limit places the most stringent constraint on new phenomena in the c {yields} u{mu}{sup +}{mu}{sup -} transition.
Date: August 1, 2007
Creator: Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T. et al.
Object Type: Article
System: The UNT Digital Library
Search for the Rare Decay K(L) ---> pi0 pi0 gamma (open access)

Search for the Rare Decay K(L) ---> pi0 pi0 gamma

The KTeV E799 experiment has conducted a search for the rare decay K{sub L} {yields} {pi}{sup 0}{sup 0}{gamma} via the topology K{sub L} {yields} {pi}{sup 0}{pi}{sup 0}{sub D}{gamma} (where {pi}{sup 0}{sub D} {yields} {gamma}e{sup +}e{sup -}). Due to Bose statistics of the {pi}{sup 0} pair and the real nature of the photon, the K{sub L} {yields} {pi}{sup 0}{pi}{sup 0}{gamma} decay is restricted to proceed at lowest order by the CP conserving direct emission (DE) of an E2 electric quadrupole photon. The rate of this decay is interesting theoretically since chiral perturbation theory predicts that this process vanishes at level O(p{sup 4}). Therefore, this mode probes chiral perturbation theory at O(p{sup 6}). In this paper we report a determination of an upper limit of 2.43 x 10{sup -7} (90% CL) for K{sub L} {yields} {pi}{sup 0}{pi}{sup 0}{gamma}. This is approximately a factor of 20 lower than previous results.
Date: August 1, 2007
Creator: Abouzaid, E.; Arenton, M.; Barker, A. R.; Bellantoni, L.; Blucher, E.; Bock, G. J. et al.
Object Type: Article
System: The UNT Digital Library
A Measurement of the Branching Ratio of the pi0 Dalitz Decay using K(L) ---> 3 pi0 Decays from KTeV (open access)

A Measurement of the Branching Ratio of the pi0 Dalitz Decay using K(L) ---> 3 pi0 Decays from KTeV

The authors present a measurement of B({pi}{sup 0} {yields} e{sup +}e{sup -}{gamma})/B({pi}{sup 0} {yields} {gamma}{gamma}) using data taken in 1999 by the E832 KTeV experiment at Fermilab. The {pi}{sup 0}s were produced by K{sub L} decays in flight that are fully reconstructed. They find 63,693 K{sub L} {yields} 3{pi}{sup 0} {yields} {gamma}{gamma} {gamma}{gamma} e{sup +}e{sup -}{gamma} decays in KTeV data (an increase of a factor of {approx} 20 in event statistics over previous experiments), and normalize to K{sub L} {yields} 3{pi}{sup 0} {yields} 6{gamma}, to extract B({pi}{sup 0} {yields} e{sup +}e{sup -}{gamma}, m{sub e{sup +}e{sup -}} > 15 MeV/c{sup 2})/B({pi}{sup 0} {yields} {gamma}{gamma}) = (3.920 {+-} 0.016 {+-} 0.036) x 10{sup -3}, where the first error is statistical and the second is systematic. Using the Mikaelian and Smith prediction for the e{sup +}e{sup -} mass spectrum as implemented in the KTeV Monte Carlo to correct to the full e{sup +}e{sup -} mass range yields B({pi}{sup 0} {yields} e{sup +}e{sup -}{gamma})/B({pi}{sup 0} {yields} {gamma}{gamma}) = (1.1559 {+-} 0.0046 {+-} 0.0107)%. This result is consistent with previous measurements and with theoretical predictions, and the uncertainty is a factor of three smaller than any previous measurement.
Date: August 1, 2007
Creator: Abouzaid, Erin E.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Asian Tracer Experiment and Atmospheric Modeling (TEAM) Project: Draft Field Work Plan for the Asian Long-Range Tracer Experiment (open access)

Asian Tracer Experiment and Atmospheric Modeling (TEAM) Project: Draft Field Work Plan for the Asian Long-Range Tracer Experiment

This report provides an experimental plan for a proposed Asian long-range tracer study as part of the international Tracer Experiment and Atmospheric Modeling (TEAM) Project. The TEAM partners are China, Japan, South Korea and the United States. Optimal times of year to conduct the study, meteorological measurements needed, proposed tracer release locations, proposed tracer sampling locations and the proposed durations of tracer releases and subsequent sampling are given. Also given are the activities necessary to prepare for the study and the schedule for completing the preparation activities leading to conducting the actual field operations. This report is intended to provide the TEAM members with the information necessary for planning and conducting the Asian long-range tracer study. The experimental plan is proposed, at this time, to describe the efforts necessary to conduct the Asian long-range tracer study, and the plan will undoubtedly be revised and refined as the planning goes forward over the next year.
Date: August 1, 2007
Creator: Allwine, K Jerry & Flaherty, Julia E.
Object Type: Report
System: The UNT Digital Library
Surface Modifications for Oxidation Resistance (open access)

Surface Modifications for Oxidation Resistance

None provided. Presentation only - PDF of slide presentation attached.
Date: August 1, 2007
Creator: Alman, D. E. & Jablonski, P. D.
Object Type: Article
System: The UNT Digital Library
LARP Long Nb3Sn Quadrupole Design (open access)

LARP Long Nb3Sn Quadrupole Design

A major milestone for the LHC Accelerator Research Program (LARP) is the test, by the end of 2009, of two 4m-long quadrupole magnets (LQ) wound with Nb3Sn conductor. The goal of these magnets is to be a proof of principle that Nb3Sn is a viable technology for a possible LHC luminosity upgrade. The design of the LQ is based on the design of the LARP Technological Quadrupoles, presently under development at FNAL and LBNL, with 90-mm aperture and gradient higher than 200 T/m. The design of the first LQ model will be completed by the end of 2007 with the selection of a mechanical design. In this paper we present the coil design addressing some fabrication technology issues, the quench protection study, and three designs of the support structure.
Date: August 1, 2007
Creator: Ambrosio, G.; Andreev, N.; Anerella, M.; Barzi, E.; Bossert, R.; Caspi, S. et al.
Object Type: Article
System: The UNT Digital Library
Status of the Prototype Pulsed Photonuclear Assessment (PPA) Inspection System (open access)

Status of the Prototype Pulsed Photonuclear Assessment (PPA) Inspection System

Prototype Photonuclear Inspection Technology – An Integrated Systems Approach* James L. Jonesa, Daren R. Normana, Kevin J. Haskella, James W. Sterbentza, Woo Y. Yoona, Scott M. Watsona, James T. Johnsona, John M. Zabriskiea, Calvin E. Mossb, Frank Harmonc a – Idaho National Laboratory, P.O. Box 1625-2802, Idaho Falls, Idaho 83415-2802 b – Los Alamos National Laboratory, P.O. Box 1663, MS B228, Los Alamos, New Mexico, 87585 c – Idaho State University, 1500 Alvin Ricken Dr., Pocatello, Idaho 83201 Active interrogation technologies are being pursued in order to address many of today’s challenging inspection requirements related to both nuclear and non-nuclear material detection. The Idaho National Laboratory, along with the Los Alamos National Laboratory and the Idaho State University’s Idaho Accelerator Center, continue to develop electron accelerator-based, photonuclear inspection technologies for the detection of shielded nuclear material within air-, rail-, and especially, maritime-cargo containers. This paper presents an overview and status of the prototype Pulsed Photonuclear Assessment (PPA) inspection system and its ability to detect shielded nuclear material by focusing on the integration of three major detection system components: delayed neutron measurement, delayed gamma-ray measurements, and a transmission, gray-scale mapping for shield material detection. Areas of future development and advancement within …
Date: August 1, 2007
Creator: An, Prototype Photonuclear Inspection Technoloby -
Object Type: Article
System: The UNT Digital Library
The Hutto Business Update (Hutto, Tex.), Vol. 3, No. 3, Ed. 1 Wednesday, August 1, 2007 (open access)

The Hutto Business Update (Hutto, Tex.), Vol. 3, No. 3, Ed. 1 Wednesday, August 1, 2007

Bimonthly newsletter focusing on information for and about the business community in Hutto, Texas, along with advertising.
Date: August 1, 2007
Creator: Arnett, Mahlon E., II
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Updated laser safety&hazard analysis for the ARES laser system based on the 2007 ANSI Z136.1 standard. (open access)

Updated laser safety&hazard analysis for the ARES laser system based on the 2007 ANSI Z136.1 standard.

A laser safety and hazard analysis was performed for the temperature stabilized Big Sky Laser Technology (BSLT) laser central to the ARES system based on the 2007 version of the American National Standards Institute's (ANSI) Standard Z136.1, for Safe Use of Lasers and the 2005 version of the ANSI Standard Z136.6, for Safe Use of Lasers Outdoors. The ARES laser system is a Van/Truck based mobile platform, which is used to perform laser interaction experiments and tests at various national test sites.
Date: August 1, 2007
Creator: Augustoni, Arnold L.
Object Type: Report
System: The UNT Digital Library
Oklahoma Firefighter (Oklahoma City, Okla.), Vol. 24, No. 6, Ed. 1 Wednesday, August 1, 2007 (open access)

Oklahoma Firefighter (Oklahoma City, Okla.), Vol. 24, No. 6, Ed. 1 Wednesday, August 1, 2007

Monthly periodical from Oklahoma City, Oklahoma published by and for members of the Oklahoma State Firefighters Association that includes news and information along with advertising.
Date: August 1, 2007
Creator: Bain, Chris
Object Type: Journal/Magazine/Newsletter
System: The Gateway to Oklahoma History
Analysis of Buoyancy-Driven Ventilation of Hydrogen from Buildings: Preprint (open access)

Analysis of Buoyancy-Driven Ventilation of Hydrogen from Buildings: Preprint

When hydrogen gas is used or stored within a building, as with a hydrogen-powered vehicle parked in a residential garage, any leakage of unignited H2 will mix with indoor air and may form a flammable mixture. One approach to safety engineering relies on buoyancy-driven, passive ventilation of H2 from the building through vents to the outside.
Date: August 1, 2007
Creator: Barley, C. D.; Gawlik, K.; Ohi, J. & Hewett, R.
Object Type: Article
System: The UNT Digital Library
Impact of the U.S. National Building Information Model Standard (NBIMS) on Building Energy Performance Simulation (open access)

Impact of the U.S. National Building Information Model Standard (NBIMS) on Building Energy Performance Simulation

The U.S. National Institute for Building Sciences (NIBS) started the development of the National Building Information Model Standard (NBIMS). Its goal is to define standard sets of data required to describe any given building in necessary detail so that any given AECO industry discipline application can find needed data at any point in the building lifecycle. This will include all data that are used in or are pertinent to building energy performance simulation and analysis. This paper describes the background that lead to the development of NBIMS, its goals and development methodology, its Part 1 (Version 1.0), and its probable impact on building energy performance simulation and analysis.
Date: August 1, 2007
Creator: Bazjanac, Vladimir
Object Type: Article
System: The UNT Digital Library
Radio detection of high-energy cosmic rays at the Pierre Auger Observatory (open access)

Radio detection of high-energy cosmic rays at the Pierre Auger Observatory

The southern Auger Observatory provides an excellent test bed to study the radio detection of extensive air showers as an alternative, cost-effective, and accurate tool for cosmic-ray physics. The data from the radio setup can be correlated with those from the well-calibrated baseline detectors of the Pierre Auger Observatory. Furthermore, human-induced radio noise levels at the southern Auger site are relatively low. We have started an R&D program to test various radio-detection concepts. Our studies will reveal Radio Frequency Interferences (RFI) caused by natural effects such as day-night variations, thunderstorms, and by human-made disturbances. These RFI studies are conducted to optimize detection parameters such as antenna design, frequency interval, antenna spacing and signal processing. The data from our initial setups, which presently consist of typically 3 - 4 antennas, will be used to characterize the shower from radio signals and to optimize the initial concepts. Furthermore, the operation of a large detection array requires autonomous detector stations. The current design is aiming at stations with antennas for two polarizations, solar power, wireless communication, and local trigger logic. The results of this initial phase will provide an important stepping stone for the design of a few tens kilometers square engineering array.
Date: August 1, 2007
Creator: Berg, A.M.van den & Collaboration, for the Pierre Auger
Object Type: Article
System: The UNT Digital Library
The Colony Courier-Leader (The Colony, Tex.), Vol. 26, No. 26, Ed. 1 Wednesday, August 1, 2007 (open access)

The Colony Courier-Leader (The Colony, Tex.), Vol. 26, No. 26, Ed. 1 Wednesday, August 1, 2007

Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date: August 1, 2007
Creator: Bick, Jack & Crimmins, Blaine
Object Type: Newspaper
System: The Portal to Texas History
Aeroelastic Instabilities of Large Offshore and Onshore Wind Turbines: Preprint (open access)

Aeroelastic Instabilities of Large Offshore and Onshore Wind Turbines: Preprint

This paper examines the aeroelastic stability of a 5-MW conceptual wind turbine mounted on a floating barge and presents results for onshore and offshore configurations for various conditions.
Date: August 1, 2007
Creator: Bir, G. & Jonkman, J.
Object Type: Article
System: The UNT Digital Library
Emissions, Monitoring and Control of Mercury from Subbituminous Coal-Fired Power Plants (open access)

Emissions, Monitoring and Control of Mercury from Subbituminous Coal-Fired Power Plants

The Subbituminous Energy Coalition (SEC) identified a need to re-test stack gas emissions from power plants that burn subbituminous coal relative to compliance with the EPA mercury control regulations for coal-fired plants. In addition, the SEC has also identified the specialized monitoring needs associated with mercury continuous emissions monitors (CEM). The overall objectives of the program were to develop and demonstrate solutions for the unique emission characteristics found when burning subbituminous coals. The program was executed in two phases; Phase I of the project covered mercury emission testing programs at ten subbituminous coal-fired plants. Phase II compared the performance of continuous emission monitors for mercury at subbituminous coal-fired power plants and is reported separately. Western Research Institute and a number of SEC members have partnered with Eta Energy and Air Pollution Testing to assess the Phase I objective. Results of the mercury (Hg) source sampling at ten power plants burning subbituminous coal concluded Hg emissions measurements from Powder River Basin (PBR) coal-fired units showed large variations during both ICR and SEC testing. Mercury captures across the Air Pollution Control Devices (APCDs) present much more reliable numbers (i.e., the mercury captures across the APCDs are positive numbers as one would expect …
Date: August 1, 2007
Creator: Bland, Alan; Sellakumar, Kumar & Cormylo, Craig
Object Type: Report
System: The UNT Digital Library
Final report : PATTON Alliance gazetteer evaluation project. (open access)

Final report : PATTON Alliance gazetteer evaluation project.

In 2005 the National Ground Intelligence Center (NGIC) proposed that the PATTON Alliance provide assistance in evaluating and obtaining the Integrated Gazetteer Database (IGDB), developed for the Naval Space Warfare Command Research group (SPAWAR) under Advance Research and Development Activity (ARDA) funds by MITRE Inc., fielded to the text-based search tool GeoLocator, currently in use by NGIC. We met with the developers of GeoLocator and identified their requirements for a better gazetteer. We then validated those requirements by reviewing the technical literature, meeting with other members of the intelligence community (IC), and talking with both the United States Geologic Survey (USGS) and the National Geospatial Intelligence Agency (NGA), the authoritative sources for official geographic name information. We thus identified 12 high-level requirements from users and the broader intelligence community. The IGDB satisfies many of these requirements. We identified gaps and proposed ways of closing these gaps. Three important needs have not been addressed but are critical future needs for the broader intelligence community. These needs include standardization of gazetteer data, a web feature service for gazetteer information that is maintained by NGA and USGS but accessible to users, and a common forum that brings together IC stakeholders and federal agency …
Date: August 1, 2007
Creator: Bleakly, Denise Rae
Object Type: Report
System: The UNT Digital Library
The Origins of the SPAR-H Method's Performance Shaping Factor Multipliers (open access)

The Origins of the SPAR-H Method's Performance Shaping Factor Multipliers

The Standardized Plant Analysis Risk-Human Reliability Analysis (SPAR-H) method has proved to be a reliable, easy-to-use method for human reliability analysis. Calculation of human error probability (HEP) rates is especially straightforward, starting with pre-defined nominal error rates for cognitive vs. action oriented tasks, and incorporating performance shaping factor (PSF) multipliers upon those nominal error rates. SPAR-H uses eight PSFs with multipliers typically corresponding to nominal, degraded, and severely degraded human performance for individual PSFs. Additionally, some PSFs feature multipliers to reflect enhanced performance. Although SPAR-H enjoys widespread use among industry and regulators, current source documents on SPAR-H such as NUREG/CR-6883 do not provide a clear account of the origin of these multipliers. The present paper redresses this shortcoming and documents the historic development of the SPAR-H PSF multipliers, from the initial use of nominal error rates, to the selection of the eight PSFs, to the mapping of multipliers to available data sources such as a Technique for Human Error Rate Prediction (THERP). Where error rates were not readily derived from THERP and other sources, expert judgment was used to extrapolate appropriate values. In documenting key background information on the multipliers, this paper provides a much needed cross-reference for human reliability …
Date: August 1, 2007
Creator: Boring, Ronald L. & Blackman, Harold S.
Object Type: Article
System: The UNT Digital Library
The Measure of Human Error: Direct and Indirect Performance Shaping Factors (open access)

The Measure of Human Error: Direct and Indirect Performance Shaping Factors

The goal of performance shaping factors (PSFs) is to provide measures to account for human performance. PSFs fall into two categories—direct and indirect measures of human performance. While some PSFs such as “time to complete a task” are directly measurable, other PSFs, such as “fitness for duty,” can only be measured indirectly through other measures and PSFs, such as through fatigue measures. This paper explores the role of direct and indirect measures in human reliability analysis (HRA) and the implications that measurement theory has on analyses and applications using PSFs. The paper concludes with suggestions for maximizing the reliability and validity of PSFs.
Date: August 1, 2007
Creator: Boring, Ronald L.; Griffith, Candice D. & Joe, Jeffrey C.
Object Type: Article
System: The UNT Digital Library
Capturing Control Room Simulator Data with the HERA Database (open access)

Capturing Control Room Simulator Data with the HERA Database

The Human Event Repository and Analysis (HERA) system has been developed as a tool for classifying and recording human performance data extracted from primary data sources. This paper reviews the process of extracting data from simulator studies for use in HERA. Simulator studies pose unique data collection challenges, both in types and quality of data measures, but such studies are ideally suited to gather operator performance data, including the full spectrum of performance shaping factors used in a HERA analysis. This paper provides suggestions for obtaining relevant human performance data for a HERA analysis from a control room simulator study and for inputting those data in a format suitable for HERA.
Date: August 1, 2007
Creator: Boring, Ronald; Whaley, April; Hallbert, Bruce; Laumann, Karin; Braarud, Per Oivind; Bye, Andreas et al.
Object Type: Article
System: The UNT Digital Library
Field quality measurements and abalysis of the LARP technology quadrupole models (open access)

Field quality measurements and abalysis of the LARP technology quadrupole models

One of the US-LHC accelerator research program goals is to develop and prove the design and technology of Nb{sub 3}Sn quadrupoles for an upgrade of the LHC Interaction Region (IR) inner triplets. Four 1-m long technology quadrupole models with a 90 mm bore and field gradient of 200 T/m based on similar coils and different mechanical structures have been developed. In this paper, we present the field quality measurements of the first several models performed at room temperature as well as at superfluid helium temperature in a wide field range. The measured field harmonics are compared to the calculated ones. The field quality of Nb{sub 3}Sn quadrupole models is compared with the NbTi quadrupoles recently produced at Fermilab for the first generation LHC IRs.
Date: August 1, 2007
Creator: Bossert, R.; Chlachidze, G.; DiMarco, J.; Kashikhin, V.V.; Lamm, M.; Schlabach, P. et al.
Object Type: Article
System: The UNT Digital Library
Infiltration in unsaturated layered fluvial deposits at Rio Bravo : photo essay and data summary. (open access)

Infiltration in unsaturated layered fluvial deposits at Rio Bravo : photo essay and data summary.

An infiltration and dye transport experiment was conducted to visualize flow and transport processes in a heterogeneous, layered, sandy-gravelly fluvial deposit adjacent to Rio Bravo Boulevard in Albuquerque, NM. Water containing red dye followed by blue-green dye was ponded in a small horizontal zone ({approx}0.5 m x 0.5 m) above a vertical outcrop ({approx}4 m x 2.5 m). The red dye lagged behind the wetting front due to slight adsorption thus allowing both the wetting front and dye fronts to be observed in time at the outcrop face. After infiltration, vertical slices were excavated to the midpoint of the infiltrometer exposing the wetting front and dye distribution in a quasi three-dimensional manner. At small-scale, wetting front advancement was influenced by the multitude of local capillary barriers within the deposit. However at the scale of the experiment, the wetting front appeared smooth with significant lateral spreading {approx} twice that in the vertical, indicating a strong anisotropy due to the pronounced horizontal layering. The dye fronts exhibited appreciably more irregularity than the wetting front, as well as the influence of preferential flow features (a fracture) that moved the dye directly to the front, bypassing the fresh water between.
Date: August 1, 2007
Creator: Brainard, James Robert & Glass, Robert John, Jr.
Object Type: Report
System: The UNT Digital Library
The Goldthwaite Eagle (Goldthwaite, Tex.), Vol. 113, No. 3, Ed. 1 Wednesday, August 1, 2007 (open access)

The Goldthwaite Eagle (Goldthwaite, Tex.), Vol. 113, No. 3, Ed. 1 Wednesday, August 1, 2007

Weekly newspaper from Goldthwaite, Texas that includes local, state, and national news along with extensive advertising.
Date: August 1, 2007
Creator: Bridges, Steven W.
Object Type: Newspaper
System: The Portal to Texas History