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3-D Hydrodynamic Modeling in a Geospatial Framework
3-D hydrodynamic models are used by the Savannah River National Laboratory (SRNL) to simulate the transport of thermal and radionuclide discharges in coastal estuary systems. Development of such models requires accurate bathymetry, coastline, and boundary condition data in conjunction with the ability to rapidly discretize model domains and interpolate the required geospatial data onto the domain. To facilitate rapid and accurate hydrodynamic model development, SRNL has developed a pre- and post-processor application in a geospatial framework to automate the creation of models using existing data. This automated capability allows development of very detailed models to maximize exploitation of available surface water radionuclide sample data and thermal imagery.
Date:
August 24, 2006
Creator:
Bollinger, J.; Alfred Garrett, A.; Larry Koffman, L. & David Hayes, D
Object Type:
Article
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 37, No. 1, Ed. 1 Friday, August 24, 2007
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
August 24, 2007
Creator:
Pace, Joshua
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
21st century locomotive technology: quarterly technical status report 26
Parasitic losses due to hybrid sodium battery thermal management do not significantly reduce the fuel saving benefits of the hybrid locomotive. Optimal thermal management trajectories were converted into realizable algorithms which were robust and gave excellent performance to limit thermal excusions and maintain fuel savings.
Date:
August 24, 2009
Creator:
Salasoo, Lembit & Chandra, Ramu
Object Type:
Report
System:
The UNT Digital Library
9th Diesel Engine Emissions Reduction (DEER) Workshop 2003
The PowerTrap{trademark} is a non-exhaust temperature dependent system that cannot become blocked and features a controlled regeneration process independent of the vehicle's drive cycle. The system has a low direct-current power source requirement available in both 12-volt and 24-volt configurations. The system is fully programmable, fully automated and includes Euro IV requirements of operation verification. The system has gained European component-type approval and has been tested with both on- road and off-road diesel fuel up to 2000 parts per million. The device is fail-safe: in the event of a device malfunction, it cannot affect the engine's performance. Accumulated mileage testing is in excess of 640,000 miles to date. Vehicles include London-type taxicabs (Euro 1 and 2), emergency service fire engines (Euro 1, 2, and 3), inner city buses, and light-duty locomotives. Independent test results by Shell Global Solutions have consistently demonstrated 85-99 percent reduction of ultrafines across the 7-35 nanometer size range using a scanning mobility particle sizer with both ultra-low sulfur diesel and off-road high-sulfur fuel.
Date:
August 24, 2003
Creator:
Kukla, Peter; Wright, James; Harris, Georgina; Ball, Andrew & Gu, Fengshou
Object Type:
Article
System:
The UNT Digital Library
Advanced Diesel Engine and Aftertreatment Technology Development for Tier 2 Emissions
Advanced diesel engine and aftertreatment technologies have been developed for multiple engine and vehicle platforms. Tier 2 (2007 and beyond) emissions levels have been demonstrated for a light truck vehicle over a FTP-75 test cycle on a vehicle chassis dynamometer. These low emissions levels are obtained while retaining the fuel economy advantage characteristic of diesel engines. The performance and emissions results were achieved by integrating advanced combustion strategies (CLEAN Combustion{copyright}) with prototype aftertreatment systems. CLEAN Combustion{copyright} allows partial control of exhaust species for aftertreatment integration in addition to simultaneous NOx and PM reduction. Analytical tools enabled the engine and aftertreatment sub-systems development and system integration. The experimental technology development methodology utilized a range of facilities to streamline development of the eventual solution including utilization of steady state and transient dynamometer test-beds to simulate chassis dynamometer test cycles.
Date:
August 24, 2003
Creator:
Aneja, Rakesh; Bolton, Brian; Oladipo, Adedejo Bukky; Pavlova-MacKinnon, Zornitza & Radwan, Amr
Object Type:
Article
System:
The UNT Digital Library
Advanced Research in Diesel Fuel Sprays Using X-rays From The Advanced Photon Source
The fuel distribution and degree of atomization in the combustion chamber is a primary factor in the formation of emissions in diesel engines. A number of diagnostics to study sprays have been developed over the last twenty years; these are primarily based on visible light measurement techniques. However, visible light scatters strongly from fuel droplets surrounding the spray, which prevents penetration of the light. This has made quantitative measurements of the spray core very difficult, particularly in the relatively dense near- nozzle region [1-3]. For this reason we developed the x-ray technique to study the properties of fuel sprays in a quantitative way [4]. The x-ray technique is not limited by scattering, which allows it to be used to make quantitative measurements of the fuel distribution. These measurements are particularly effective in the region near the nozzle where other techniques fail. This technique has led to a number of new insights into the structure of fuel sprays, including the discovery and quantitative measurement of shock waves generated under some conditions by high-pressure diesel sprays [5]. We also performed the first-ever quantitative measurements of the time-resolved mass distribution in the near-nozzle region, which demonstrated that the spray is atomized only a …
Date:
August 24, 2003
Creator:
Powell, C.
Object Type:
Article
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 125, No. 7, Ed. 1 Thursday, August 24, 2000
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
August 24, 2000
Creator:
Lucas, Donnie A.
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 131, No. 13, Ed. 1 Thursday, August 24, 2006
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
August 24, 2006
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
Altus Times (Altus, Okla.), Vol. 101, No. 142, Ed. 1 Thursday, August 24, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 24, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 102, No. 150, Ed. 1 Friday, August 24, 2001
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 24, 2001
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 105, No. 137, Ed. 1 Sunday, August 24, 2003
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 24, 2003
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 106, No. 124, Ed. 1 Tuesday, August 24, 2004
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 24, 2004
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 123, Ed. 1 Wednesday, August 24, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 24, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 108, No. 125, Ed. 1 Thursday, August 24, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 24, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 109, No. 73, Ed. 1 Friday, August 24, 2007
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 24, 2007
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 110, No. 19, Ed. 1 Sunday, August 24, 2008
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 24, 2008
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Alvin Sun-Advertiser (Alvin, Tex.), Vol. 112, No. 64, Ed. 1 Sunday, August 24, 2003
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
August 24, 2003
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History
The AMPX-2000 Operating System for Producing Continuous Energy and Multi-Group Cross Sections from Basic Data Libraries Using the ENDF/B-6 Formats
AMPX-2000 is a modular system of FORTRAN computer programs that relate to nuclear analysis with a primary emphasis on tasks associated with the production and use of multigroup and continuous energy cross-sections. AMPX-2000 accepts basic cross-section data from ENDF/B libraries. As opposed to previous versions of AMPX, the current version processes the latest ENDF/B version VI formats. AMPX-2000 can be used to generate a variety of multigroup libraries that can be used with modern transport codes to perform nuclear analyses. Continuous energy or ''point'' cross-section libraries can be produced for use in Monte Carlo codes and other applications. In addition, AMPX has an internal multigroup format that can be read by various AMPX modules as well as codes outside the system.
Date:
August 24, 2001
Creator:
Greene, N. M.
Object Type:
Article
System:
The UNT Digital Library
Amtrak: Improved Management and Controls over Food and Beverage Service Needed
A letter report issued by the Government Accountability Office with an abstract that begins "Food and beverages have been served on board National Railroad Passenger Corporation (Amtrak) trains since Amtrak was created. Amtrak's 11 commissaries, located around the country, are responsible for receiving, warehousing and stocking food, beverages, and other items for Amtrak's on-board dining and cafe service. January 1999, Amtrak ran these commissaries with its own employees. Since then, Amtrak has contracted out the responsibility for the commissaries and for ordering and stocking all food, beverage, and related items under a contract that expires in September 2006. Gate Gourmet, the contractor, is also a supplier of food and beverages to several major airlines. During fiscal years 2002 through 2004, the period we focused on in our audit work, Amtrak paid Gate Gourmet between $59 million and $64 million a year in reimbursements and fees. Gate Gourmet personnel operate Amtrak-owned commissaries and order, receive, store, and stock trains with food, beverages, and other related items, such as table linens and napkins. Food and beverage supplies are charged to Amtrak employees who provide on-board food and beverage service and account for the food and beverages en route. When a train arrives …
Date:
August 24, 2005
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Analysis of Soil Remediation Requirements of Abandoned Centralized and Commercial Drilling
During this reporting period our project focused on (1) review of case studies of remediation of centralized and commercial drilling fluid disposal (CCDD) sites in Texas, and (2) information transfer with preparation of a proceedings paper and a workshop/short course. Texas remediation of certain drilling-fluid disposal sites includes examples at CCDD sites as well as commercial oil reclamation sites and saltwater disposal sites that also disposed of drilling fluids in pits. Site investigations range from qualitative visual inspection and assessment to comprehensive hydrodynamic, chemical, and geophysical analyses of wastes and groundwater. A range of techniques has been used to evaluate waste material, soil, groundwater, and surface water for potential contamination with hydrocarbons, chemicals, saltwater, and naturally occurring radioactive materials (NORM). Most constituents of concern measured in these studies are below regulatory action levels and established guidelines. A proceedings paper summarizes results presented in this and previous semi-annual progress reports will be part of the Transactions of the Gulf Coast Association of Geological Societies (GCAGS). A technology transfer workshop also was prepared as part of that Annual Meeting of the GCAGS to be held in November 2002.
Date:
August 24, 2002
Creator:
Nance, H. Seay; Dutton, Alan R. & Mullican, Jerry
Object Type:
Report
System:
The UNT Digital Library
ANALYTICAL TOOL DEVELOPMENT FOR AFTERTREATMENT SUB-SYSTEMS INTEGRATION
The stringent emissions standards of 2007 and beyond require complex engine, aftertreatment and vehicle systems with a high degree of sub-system interaction and flexible control solutions. This necessitates a system-based approach to technology development, in addition to individual sub-system optimization. Analytical tools can provide an effective means to evaluate and develop such complex technology interactions as well as understand phenomena that is either too expensive or impossible to study with conventional experimental means. The analytical effort can also guide experimental development and thus lead to efficient utilization of available experimental resources.A suite of analytical models has been developed to represent PM and NOx aftertreatment sub-systems. These models range from computationally inexpensive zero-dimensional models for real-time control applications to CFD-based, multi-dimensional models with detailed temporal and spatial resolution. Such models in conjunction with well established engine modeling tools such as engine cycle simulation, engine controls modeling, CFD models of non-combusting and combusting flow, and vehicle models provide a comprehensive analytical toolbox for complete engine, aftertreatment and vehicle sub-systems development and system integration applications. However, the fidelity of aftertreatment models and application going forward is limited by the lack of fundamental kinetic data.
Date:
August 24, 2003
Creator:
Bolton, B; Fan, A; Goney, K; Pavlova-MacKinnon, Z; Sisken, K & Zhang, H
Object Type:
Article
System:
The UNT Digital Library
Analyzing Nuclear Fuel Cycles from Isotopic Ratios of Waste Products Applicable to Measurement by Accelerator Mass Spectrometry
An extensive study was conducted to determine isotopic ratios of nuclides in spent fuel that may be utilized to reveal historical characteristics of a nuclear reactor cycle. This forensic information is important to determine the origin of unknown nuclear waste. The distribution of isotopes in waste products provides information about a nuclear fuel cycle, even when the isotopes of uranium and plutonium are removed through chemical processing. Several different reactor cycles of the PWR, BWR, CANDU, and LMFBR were simulated for this work with the ORIGEN-ARP and ORIGEN 2.2 codes. The spent fuel nuclide concentrations of these reactors were analyzed to find the most informative isotopic ratios indicative of irradiation cycle length and reactor design. Special focus was given to long-lived and stable fission products that would be present many years after their creation. For such nuclides, mass spectrometry analysis methods often have better detection limits than classic gamma-ray spectroscopy. The isotopic ratios {sup 151}Sm/{sup 146}Sm, {sup 149}Sm/{sup 146}Sm, and {sup 244}Cm/{sup 246}Cm were found to be good indicators of fuel cycle length and are well suited for analysis by accelerator mass spectroscopy.
Date:
August 24, 2005
Creator:
Biegalski, S R; Whitney, S M & Buchholz, B
Object Type:
Article
System:
The UNT Digital Library
[Andrea and Cheylon scooping ice cream]
A photograph of Andrea Robledo and Cheylon Brown in the UNT Multicultural Center offices. They are both scooping ice cream and putting it into individual plastic cups. There are also large bottles of Coca Cola that are being added to the cups to make floats.
Date:
August 24, 2005
Creator:
University of North Texas. Multicultural Center.
Object Type:
Photograph
System:
The UNT Digital Library
APBF-DEC NOx Adsorber/DPF Project: Light-Duty Passenger Car Platform
A 1.9L turbo direct injection (TDI) diesel engine was modified to achieve the upcoming Tier 2 Bin 5 emission standard in combination with a NOx adsorber catalyst (NAC) and a diesel particulate filter (DPF). The primary objective for developing this test bed is to investigating the effects of different fuel sulfur contents on the performance of an advanced emission control system (ECS) in a light-duty application. During the development process, the engine-out emissions were minimized by applying a state-of-the-art combustion system in combination with cooled exhaust gas recirculation (EGR). The subsequent calibration effort resulted in emission levels requiring 80-90 percent nitrogen-oxide (NOx) and particulate matter (PM) conversion rates by the corresponding ECS. The strategy development included ean/rich modulation for NAC regeneration, as well as, the desulfurization of the NAC and the regeneration of the DPF. Two slightly different ECS were investigated and calibrated. The initial vehicle results in an Audi A4 station wagon over the federal test procedure (FTP), US 06, and the highway fuel economy test (HFET) cycle indicate the potential of these configuration to meet the future Tier 2 emission standard.
Date:
August 24, 2003
Creator:
Tomazic, D; Tatur, M & Thornton, M
Object Type:
Article
System:
The UNT Digital Library