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837
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452
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93
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The Greensheet
72
Vintage Baseball
48
8th Annual Book Club Publisher's Luncheon Roundtable
42
Folder 2: 8th Annual Book Club Publisher's Luncheon Roundtable, September 22, 2007
42
Denison Arts District
32
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30
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An Improved Photometric Calibration of the Sloan Digital SkySurvey Imaging Data
We present an algorithm to photometrically calibrate widefield optical imaging surveys, that simultaneously solves for thecalibration parameters and relative stellar fluxes using overlappingobservations. The algorithm decouples the problem of "relative"calibrations from that of "absolute" calibrations; the absolutecalibration is reduced to determining a few numbers for the entiresurvey. We pay special attention to the spatial structure of thecalibration errors, allowing one to isolate particular error modes indownstream analyses. Applying this to the SloanDigital Sky Survey imagingdata, we achieve ~;1 percent relative calibration errors across 8500sq.deg/ in griz; the errors are ~;2 percent for the u band. These errorsare dominated by unmodelled atmospheric variations at Apache PointObservatory. These calibrations, dubbed ubercalibration, are now publicwith SDSS Data Release 6, and will be a part of subsequent SDSS datareleases.
Date:
September 30, 2007
Creator:
Padmanabhan, Nikhil; Schlegel, David J.; Finkbeiner, Douglas P.; Barentine, J.C.; Blanton, Michael R.; Brewington, Howard J. et al.
Object Type:
Article
System:
The UNT Digital Library
Integrated, Multi-Scale Characterization of Imbibition and Wettability Phenomena Using Magnetic Resonance and Wide-Band Dielectric Measurements
The petrophysical properties of rocks, particularly their relative permeability and wettability, strongly influence the efficiency and the time-scale of all hydrocarbon recovery processes. However, the quantitative relationships needed to account for the influence of wettability and pore structure on multi-phase flow are not yet available, largely due to the complexity of the phenomena controlling wettability and the difficulty of characterizing rock properties at the relevant length scales. This project brings together several advanced technologies to characterize pore structure and wettability. Grain-scale models are developed that help to better interpret the electric and dielectric response of rocks. These studies allow the computation of realistic configurations of two immiscible fluids as a function of wettability and geologic characteristics. These fluid configurations form a basis for predicting and explaining macroscopic behavior, including the relationship between relative permeability, wettability and laboratory and wireline log measurements of NMR and dielectric response. Dielectric and NMR measurements have been made show that the response of the rocks depends on the wetting and flow properties of the rock. The theoretical models can be used for a better interpretation and inversion of standard well logs to obtain accurate and reliable estimates of fluid saturation and of their producibility. The …
Date:
September 30, 2007
Creator:
Sharma, Mukul M.; Bryant, Steven L.; Torres-Verdin, Carlos & Hirasaki, George
Object Type:
Report
System:
The UNT Digital Library
Integrated Robot-Human Control in Mining Operations
This report contains a detailed description of the work conducted for the project on Integrated Robot-Human Control in Mining Operations at University of Nevada, Reno. This project combines human operator control with robotic control concepts to create a hybrid control architecture, in which the strengths of each control method are combined to increase machine efficiency and reduce operator fatigue. The kinematics reconfiguration type differential control of the excavator implemented with a variety of 'software machine kinematics' is the key feature of the project. This software re-configured excavator is more desirable to execute a given digging task. The human operator retains the master control of the main motion parameters, while the computer coordinates the repetitive movement patterns of the machine links. These repetitive movements may be selected from a pre-defined family of trajectories with different transformations. The operator can make adjustments to this pattern in real time, as needed, to accommodate rapidly-changing environmental conditions. A working prototype has been developed using a Bobcat 435 excavator. The machine is operational with or without the computer control system depending on whether the computer interface is on or off. In preparation for emulated mining tasks tests, typical, repetitive tool trajectories during surface mining operations …
Date:
September 30, 2007
Creator:
Danko, George
Object Type:
Report
System:
The UNT Digital Library
[Janaye Woods moving after the ball]
Photograph of Janaye Woods going after the soccer ball during a game between the Mean Green and the University of Louisiana at Lafayette. One of her opponents is beside her and is closer to the ball. The stands with the audience are on the other side of the field.
Date:
September 30, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Janaye Woods moving with the ball]
Photograph of Janaye Woods moving the soccer ball during a game between the Mean Green and the University of Louisiana at Lafayette. A teammate is following behind her and there is a fence and a railroad behind them.
Date:
September 30, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Janaye Woods running on the field]
Photograph of Janaye Woods running during a game between the Mean Green and the University of Louisiana at Lafayette. A teammate is following behind her and there is an opponent to the side in the direction she is running. The fence, a net, the goal, and a railroad are visible behind them.
Date:
September 30, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Janaye Woods rushing for the ball]
Photograph of Janaye Woods fighting to get to the soccer ball during a game between the Mean Green and the University of Louisiana at Lafayette. Several players are following behind and one opponent is attempting to push her out of the way. There is a fence and a railroad behind them.
Date:
September 30, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Janaye Woods sliding on the field]
Photograph of Janaye Woods sliding towards the soccer ball during a game between the Mean Green and the University of Louisiana at Lafayette. An opponent to her side is moving in the same direction. There is a fence and structures in the distance.
Date:
September 30, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Katy Booth and players chasing ball]
Photograph of Katy Booth going after the soccer ball during a game between the Mean Green and the University of Louisiana at Lafayette. One of her opponents is in front of her and is kicking her leg out to the ball. Other players are gathered around them and the fence and railroad track are visible at the edge of the field.
Date:
September 30, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Kendall Juett after kicking ball]
Photograph of Kendall Juett, who was one of the captains for the match, after kicking the soccer ball during a game between the Mean Green and the University of Louisiana at Lafayette. Other players are running around her. There is a fence and a railroad behind them.
Date:
September 30, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
Laser Remote Sensing: FY07 Summary Report
Standoff detection and characterization of chemical plumes using Frequency Modulated Differential Absorption Lidar (FM-DIAL) is a promising technique for the detection of nuclear proliferation activities. For the last several years Pacific Northwest National Laboratory (PNNL) has been developing an FM-DIAL based remote sensing system as part of PNNL's Infrared Sensors project within NA-22's Enabling Technologies portfolio. In FY06 the remote sensing effort became a stand-alone project within the Plutonium Production portfolio with the primary goal of transitioning technology from the laboratory to the user community. Current systems remotely detect trace chemicals in the atmosphere over path lengths of hundreds of meters for monostatic operation (without a retro-reflector target) and up to ten kilometers for bistatic operation (with a retro-reflector target). The FM-DIAL sensor is sensitive and highly selective for chemicals with narrow-band absorption features on the order of 1-2 cm-1; as a result, the FM-DIAL sensors are best suited to simple di-atomic or tri-atomic molecules and other molecules with unusually narrow absorption features. A broadband sensor is currently being developed. It is designed to detect chemicals with spectral features on the order of several 10s of wavenumbers wide. This will expand the applicability of this technology to the detection of …
Date:
September 30, 2007
Creator:
Harper, Warren W.; Strasburg, Jana D.; Golovich, Elizabeth C.; Thompson, Jason S.; Stewart, Timothy L.; Batdorf, Michael T. et al.
Object Type:
Report
System:
The UNT Digital Library
[List of Officers and Directors]
List of the names of officers and directors.
Date:
September 30, 2007
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Long-Term Modeling of Wind Energy in the United States
An improved representation of wind energy has been developed for the ObjECTS MiniCAM integrated assessment modeling framework. The first version of this wind model was used for the CCTP scenarios, where wind accounts for between 9% and 17% of U.S. electricity generation by 2095. Climate forcing stabilization policies tend to increase projected deployment. Accelerated technological development in wind electric generation can both increase output and reduce the costs of wind energy. In all scenarios, wind generation is constrained by its costs relative to alternate electricity sources, particularly as less favorable wind farm sites are utilized. These first scenarios were based on exogenous resource estimates that do not allow evaluation of resource availability assumptions. A more detailed representation of wind energy is under development that uses spatially explicit resource information and explicit wind turbine technology characteristics.
Date:
September 30, 2007
Creator:
Kyle, G. Page; Smith, Steven J.; Wise, Marshall A.; Lurz, Joshua P. & Barrie, Daniel
Object Type:
Report
System:
The UNT Digital Library
Measurement of the Neutron electric form factor at Q2=0.8 2(GeV\\c)
Nucleon form factors allow a sensitive test for models of the nucleon. Recent experiments utilising polarisation observables have resulted, for the first time, in a model-independent determination of the neutron electric form factor GnE. This method employed an 80% longitudinally polarised, high intensity (10 uA) electon beam (883 MeV) that was quasi-elastically scattered off a liquid deuterium target in the reaction D (e, en)p. A neutron polarimeter was designed and installed to measure the ratio of transverse-to-longitudinal polarisation using neutron scattering asymmetries. This ratio allowed a determination of the neutron elastic form factor, GnE, free of the previous large systematic uncertainties associated with the deuterium wave function. The experiment took place in the A1 experimental hall at MAMI taking advantage of a high resolution magnetic spectrometer. A detailed investigation was carried out into the performance of the neutron polarimeter.
Date:
September 30, 2007
Creator:
Glazier, Derek
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Measurement of the Top Quark Mass in 1.96 TeV Proton-Antiproton Collisions Using a Novel Matrix Element Method
A measurement of the top quark mass in t{bar t} {yields} l + jets candidate events, obtained from p{bar p} collisions at {radical}s = 1.96 TeV at the Fermilab Tevatron using the CDF II detector, is presented. The measurement approach is that of a matrix element method. For each candidate event, a two dimensional likelihood is calculated in the top pole mass and a constant scale factor, 'JES', where JES multiplies the input particle jet momenta and is designed to account for the systematic uncertainty of the jet momentum reconstruction. As with all matrix element techniques, the method involves an integration using the Standard Model matrix element for t{bar t} production and decay. However, the technique presented is unique in that the matrix element is modified to compensate for kinematic assumptions which are made to reduce computation time. Background events are dealt with through use of an event observable which distinguishes signal from background, as well as through a cut on the value of an event's maximum likelihood. Results are based on a 955 pb{sup -1} data sample, using events with a high-p{sub T} lepton and exactly four high-energy jets, at least one of which is tagged as coming from …
Date:
September 30, 2007
Creator:
CDF Collaboration
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Mercury Oxidation via Catalytic Barrier Filters Phase II
In 2004, the Department of Energy National Energy Technology Laboratory awarded the University of North Dakota a Phase II University Coal Research grant to explore the feasibility of using barrier filters coated with a catalyst to oxidize elemental mercury in coal combustion flue gas streams. Oxidized mercury is substantially easier to remove than elemental mercury. If successful, this technique has the potential to substantially reduce mercury control costs for those installations that already utilize baghouse barrier filters for particulate removal. Completed in 2004, Phase I of this project successfully met its objectives of screening and assessing the possible feasibility of using catalyst coated barrier filters for the oxidation of vapor phase elemental mercury in coal combustion generated flue gas streams. Completed in September 2007, Phase II of this project successfully met its three objectives. First, an effective coating method for a catalytic barrier filter was found. Second, the effects of a simulated flue gas on the catalysts in a bench-scale reactor were determined. Finally, the performance of the best catalyst was assessed using real flue gas generated by a 19 kW research combustor firing each of three separate coal types.
Date:
September 30, 2007
Creator:
Seames, Wayne; Mann, Michael; Muggli, Darrin; Hrdlicka, Jason & Horabik, Carol
Object Type:
Report
System:
The UNT Digital Library
The Message, Volume 43, Number 2, September 2007
Newsletter of Congregation Beth Yeshurun in Houston, including news and events, upcoming services, member announcements, editorials, and other information of interest to congregants.
Date:
September 30, 2007
Creator:
Congregation Beth Yeshurun (Houston, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Micro-CHP Systems for Residential Applications
Integrated micro-CHP (Cooling, Heating and Power) system solutions represent an opportunity to address all of the following requirements at once: conservation of scarce energy resources, moderation of pollutant release into our environment, and assured comfort for home-owners. The objective of this effort was to establish strategies for development, demonstration, and sustainable commercialization of cost-effective integrated CHP systems for residential applications. A unified approach to market and opportunity identification, technology assessment, specific system designs, adaptation to modular product platform component conceptual designs was employed. UTRC's recommendation to U.S. Department of Energy is to go ahead with the execution of the proposed product development and commercialization strategy plan under Phase II of this effort. Recent indicators show the emergence of micro-CHP. More than 12,000 micro-CHP systems have been sold worldwide so far, around 7,500 in 2004. Market projections predict a world-wide market growth over 35% per year. In 2004 the installations were mainly in Europe (73.5%) and in Japan (26.4%). The market in North-America is almost non-existent (0.1%). High energy consumption, high energy expenditure, large spark-spread (i.e., difference between electricity and fuel costs), big square footage, and high income are the key conditions for market acceptance. Today, these conditions are best found …
Date:
September 30, 2007
Creator:
DeValve, Timothy & Olsommer, Benoit
Object Type:
Report
System:
The UNT Digital Library
Modeling Wettability Alteration using Chemical EOR Processes in Naturally Fractured Reservoirs
The objective of our search is to develop a mechanistic simulation tool by adapting UTCHEM to model the wettability alteration in both conventional and naturally fractured reservoirs. This will be a unique simulator that can model surfactant floods in naturally fractured reservoir with coupling of wettability effects on relative permeabilities, capillary pressure, and capillary desaturation curves. The capability of wettability alteration will help us and others to better understand and predict the oil recovery mechanisms as a function of wettability in naturally fractured reservoirs. The lack of a reliable simulator for wettability alteration means that either the concept that has already been proven to be effective in the laboratory scale may never be applied commercially to increase oil production or the process must be tested in the field by trial and error and at large expense in time and money. The objective of Task 1 is to perform a literature survey to compile published data on relative permeability, capillary pressure, dispersion, interfacial tension, and capillary desaturation curve as a function of wettability to aid in the development of petrophysical property models as a function of wettability. The new models and correlations will be tested against published data. The models will …
Date:
September 30, 2007
Creator:
Delshad, Mojdeh; Pope, Gary A. & Sepehrnoori, Kamy
Object Type:
Report
System:
The UNT Digital Library
Multicomponent Seismic Analysis and Calibration to Improve Recovery from Algal Mounds: Application to the Roadrunner/Towaoc area of the Paradox Basin, UTE Mountain UTE Reservation, Colorado
The goals of this project were: (1) To enhance recovery of oil contained within algal mounds on the Ute Mountain Ute tribal lands. (2) To promote the use of advanced technology and expand the technical capability of the Native American Oil production corporations by direct assistance in the current project and dissemination of technology to other Tribes. (3) To develop an understanding of multicomponent seismic data as it relates to the variations in permeability and porosity of algal mounds, as well as lateral facies variations, for use in both reservoir development and exploration. (4) To identify any undiscovered algal mounds for field-extension within the area of seismic coverage. (5) To evaluate the potential for applying CO{sub 2} floods, steam floods, water floods or other secondary or tertiary recovery processes to increase production. The technical work scope was carried out by: (1) Acquiring multicomponent seismic data over the project area; (2) Processing and reprocessing the multicomponent data to extract as much geological and engineering data as possible within the budget and time-frame of the project; (3) Preparing maps and data volumes of geological and engineering data based on the multicomponent seismic and well data; (4) Selecting drilling targets if warranted by …
Date:
September 30, 2007
Creator:
Hachey, Joe
Object Type:
Report
System:
The UNT Digital Library
Multiscale Atomistic Simulation of Metal-Oxygen Surface Interactions: Methodological Development, Theoretical Investigation, and Correlation With Experiment - Final Report
Our long-term vision is for a comprehensive and fundamental understanding of a critical gas-surface reaction, nano-oxidationÃÂÃÂÃÂâÃÂÃÂÃÂÃÂÃÂÃÂÃÂàfrom the adsorption of oxygen atoms on the metal surface to the coalescence of the bulk oxideÃÂÃÂÃÂâÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂvia coordinated multi-scale theoretical and in situ experimental efforts. Reaching this goal necessitates close collaborations between theorists and experimentalists, and the development and utilization of unique and substantial theoretical and experimental tools. Achievement of this goal will be a major breakthrough in dynamic surface/interface reactions that will dramatically impact several scientific fields. Many of these are of interest to DOE, such as thin films and nanostructures that use oxidation for processing, heteroepitaxy, oxidation and corrosion, environmental stability of nano-devices, catalysis, fuel cells and sensors. The purpose of this specific DOE program was the support for the theoretical effort. Our focus for the first round of funding has been the development of a Kinetic Monte Carlo (KMC) code to simulate the complexities of oxygen interactions with a metal surface. Our primary deliverable is a user-friendly, general and quite versatile KMC program, called Thin Film Oxidation (TFOx). TFOx-2D presently simulates the general behavior of irreversible 2-dimensional nucleation and growth of epitaxial islands on a square or rectangular lattice. The TFOx …
Date:
September 30, 2007
Creator:
Yang, Judith C.; McGaughey, Alan; Sinnott, Susan & Philpot, Simon
Object Type:
Report
System:
The UNT Digital Library
MWRRET Value-Added Product: The Retrieval of Liquid Water Path and Precipitable Water Vapor from Microwave Radiometer (MWR) Datasets
This report provides a short description of the Atmospheric Radiation Measurement (ARM) microwave radiometer (MWR) RETrievel (MWRRET) Value-Added Product (VAP) algorithm. This algorithm utilizes complimentary physical and statistical retrieval methods and applies brightness temperature offsets to reduce spurious liquid water path (LWP) bias in clear skies resulting in significantly improved precipitable water vapor (PWV) and LWP retrievals. We present a general overview of the technique, input parameters, output products, and describe data quality checks. A more complete discussion of the theory and results is given in Turner et al. (2007b).
Date:
September 30, 2007
Creator:
Gaustad, K. L. & Turner, D. D.
Object Type:
Report
System:
The UNT Digital Library
NGNP Graphite Selection and Acquisition Strategy
The nuclear graphite (H-451) previously used in the United States for High-Temperature Reactors (HTRs) is no longer available. New graphites have been developed and are considered suitable candidates for the Next-Generation Nuclear Plant (NGNP). A complete properties database for these new, available, candidate grades of graphite must be developed to support the design and licensing of NGNP core components. Data are required for the physical, mechanical (including radiation-induced creep), and oxidation properties of graphites. Moreover, the data must be statistically sound and take account of in-billet, between billets, and lot-to-lot variations of properties. These data are needed to support the ongoing development1 of the risk-derived American Society of Mechanical Engineers (ASME) graphite design code (a consensus code being prepared under the jurisdiction of the ASME by gas-cooled reactor and NGNP stakeholders including the vendors). The earlier Fort St. Vrain design of High-Temperature Reactor (HTRs) used deterministic performance models for H-451, while the NGNP will use new graphite grades and risk-derived (probabilistic) performance models and design codes, such as that being developed by the ASME. A radiation effects database must be developed for the currently available graphite materials, and this requires a substantial graphite irradiation program. The graphite Technology Development Plan …
Date:
September 30, 2007
Creator:
Burchell, T.; Bratton, R. & Windes, W.
Object Type:
Report
System:
The UNT Digital Library
Novel Composite Hydrogen-Permeable Membranes for Nonthermal Plasma Reactors for the Decomposition of Hydrogen Sulfide
The goal of this experimental project was to design and fabricate a reactor and membrane test cell to dissociate hydrogen sulfide (H{sub 2}S) in a nonthermal plasma and to recover hydrogen (H{sub 2}) through a superpermeable multi-layer membrane. Superpermeability of hydrogen atoms (H) has been reported by some researchers using membranes made of Group V transition metals (niobium, tantalum, vanadium, and their alloys), but it was not achieved at the moderate pressure conditions used in this study. However, H{sub 2}S was successfully decomposed at energy efficiencies higher than any other reports for the high H{sub 2}S concentration and moderate pressures (corresponding to high reactor throughputs) used in this study.
Date:
September 30, 2007
Creator:
Argyle, Morris; Ackerman, John; Muknahallipatna, Suresh; Hamann, Jerry; Legowski, Stanislaw; Zhao, Gui-Bing et al.
Object Type:
Report
System:
The UNT Digital Library