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432 Matching Results
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Determination of Electrochemical Performance, and Thermo-Mechanicalchemical Stability of SOFCS From Defect Modeling
The objectives of this project were to: provide fundamental relationships between SOFC performance and operating conditions and transient (time dependent) transport properties; extend models to thermo-mechanical stability, thermo-chemical stability, and multilayer structures; incorporate microstructural effects such as grain boundaries and grain-size distribution; experimentally verify models and devise strategies to obtain relevant material constants; and assemble software package for integration into SECA failure analysis models.
Date:
January 27, 2005
Creator:
Wachsman, E. D.; Duncan, K. L. & Ebrahimi, F.
Object Type:
Presentation
System:
The UNT Digital Library
Development of a Couette-Taylor flow device with active minimization of secondary circulation
A novel Taylor-Couette experiment has been developed to produce rotating shear ows for the study of hydrodynamic and magnetohydrodynamic instabilities which are believed to drive angular momentum transport in astrophysical accretion disks. High speed, concentric, corotating cylinders generate the flow where the height of the cylinders is twice the radial gap width. Ekman pumping is controlled and minimized by splitting the vertical boundaries into pairs of nested, differentially rotating rings. The end rings and cylinders comprise four independently driven rotating components which provide exibility in developing flow profiles. The working fluids of the experiment are water, a water-glycerol mix, or a liquid gallium alloy. The mechanical complexity of the apparatus and large dynamic pressures generated by high speed operation with the gallium alloy presented unique challenges. The mechanical implementation of the experiment and some representative results obtained with Laser Doppler Velocimetry in water are discussed.
Date:
January 27, 2009
Creator:
Schartman, Ethan
Object Type:
Report
System:
The UNT Digital Library
Development of Reliable Methods for Sealing Solid Oxide Fuel Cell Stacks
This presentation discusses the development of reliable methods for sealing solid oxide fuel cell stacks.
Date:
January 27, 2005
Creator:
Loehman, R.; M., Brochu.; Gauntt, B. & Shah, R.
Object Type:
Presentation
System:
The UNT Digital Library
Development of Wet-Etching Tools for Precision Optical Figuring
This FY03 final report on Wet Etch Figuring involves a 2D thermal tool. Its purpose is to flatten (0.3 to 1 mm thickness) sheets of glass faster thus cheaper than conventional sub aperture tools. An array of resistors on a circuit board was used to heat acid over the glass Optical Path Difference (OPD) thick spots and at times this heating extended over the most of the glass aperture. Where the acid is heated on the glass it dissolves faster. A self-referencing interferometer measured the glass thickness, its design taking advantage of the parallel nature and thinness of these glass sheets. This measurement is used in close loop control of the heating patterns of the circuit board thus glass and acid. Only the glass and acid were to be moved to make the tool logistically simple to use in mass production. A set of 4-circuit board, covering 80 x 80-cm aperture was ordered, but only one 40 x 40-cm board was put together and tested for this report. The interferometer measurement of glass OPD was slower than needed on some glass profiles. Sometimes the interference fringes were too fine to resolve which would alias the sign of the glass thickness …
Date:
January 27, 2004
Creator:
Rushford, M C; Dixit, S N; Hyde, R; Britten, J A; Nissen, J; Aasen, M et al.
Object Type:
Report
System:
The UNT Digital Library
Diamond Measuring Machine
The fundamental goal of this project was to develop additional capabilities to the diamond measuring prototype, work out technical difficulties associated with the original device, and perform automated measurements which are accurate and repeatable. For this project, FM and T was responsible for the overall system design, edge extraction, and defect extraction and identification. AccuGem provided a lab and computer equipment in Lawrence, 3D modeling, industry expertise, and sets of diamonds for testing. The system executive software which controls stone positioning, lighting, focusing, report generation, and data acquisition was written in Microsoft Visual Basic 6, while data analysis and modeling were compiled in C/C++ DLLs. All scanning parameters and extracted data are stored in a central database and available for automated analysis and reporting. The Phase 1 study showed that data can be extracted and measured from diamond scans, but most of the information had to be manually extracted. In this Phase 2 project, all data required for geometric modeling and defect identification were automatically extracted and passed to a 3D modeling module for analysis. Algorithms were developed which automatically adjusted both light levels and stone focus positioning for each diamond-under-test. After a diamond is analyzed and measurements are completed, …
Date:
January 27, 2000
Creator:
Krstulic, J. F.
Object Type:
Report
System:
The UNT Digital Library
Diesel Reforming for Fuel Cell Auxiliary Power Units
This objective of this project was to develop technology suitable for onboard reforming of diesel. The approach was to examine catalytic partial oxidation and steam reforming.
Date:
January 27, 2005
Creator:
Borup, R.; Parkinson, W. J.; Inbody, M.; Brosha, E. L. & Guidry, D. R.
Object Type:
Presentation
System:
The UNT Digital Library
Diesel Reforming for Solid Oxide Fuel Cell Application
This presentation discusses the development of a diesel reforming catalyst and catalytic system development.
Date:
January 27, 2005
Creator:
Liu, D-J.; Sheen, S-H. & Krumpelt, M.
Object Type:
Presentation
System:
The UNT Digital Library
Disability Evaluation of Military Servicemembers
This report is intended as a primer to describe disability evaluation in general, including evaluations used by the Department of Defense (DOD) and the Department of Veterans Affairs (VA), in addition to civilian evaluations used by the Social Security Administration (SSA) and by workers' compensation programs. It also describes the DOD and VA disability rating processes in greater detail as well as recent congressional and executive actions and recommendations regarding DOD and VA disability evaluations.
Date:
January 27, 2009
Creator:
Scott, Christine; Panangala, Sidath V.; Henning, Charles A. & Szymendera, Scott
Object Type:
Report
System:
The UNT Digital Library
Doctoral Recital: 2003-01-27 – Riki Darding, soprano
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
January 27, 2003
Creator:
Darding, Riki
Object Type:
Sound
System:
The UNT Digital Library
[Draft of NTIEVA Leadership Retreat Agenda]
A draft of an agenda used for the NTIEVA Leadership Retreat.
Date:
2000-01-27/2000-01-28
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Drinking Water Management Act
This law was passed by the Republic of China (Taiwan) to safeguard public health by protecting drinking water resources from pollution by dumping, logging, industry, nuclear waste, ranching, recreation, mineral exploration and extraction, transportation, and other activities.
Date:
January 27, 2006
Creator:
China (Republic : 1949- ). Huan jing bao hu shu.
Object Type:
Text
System:
The UNT Digital Library
Drug Control: DOD Allocates Fewer Assets to Drug Control Efforts
Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed the role of the Department of Defense (DOD) in reducing the supply of illegal drugs entering the United States, focusing on: (1) the decline in DOD's aerial and maritime support allocated to counterdrug activities from fiscal years 1992 through 1999 and some of the consequences and reasons for the decline; (2) the obstacles DOD faces in helping foreign governments counter illegal drug activities; and (3) DOD's counterdrug strategy and the need for performance measures to judge its counterdrug program effectiveness."
Date:
January 27, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
The Dublin Citizen (Dublin, Tex.), Vol. 10, No. 21, Ed. 1 Thursday, January 27, 2000
Weekly newspaper from Dublin, Texas that includes local, state, and national news along with advertising.
Date:
January 27, 2000
Creator:
Norville, Buddy
Object Type:
Newspaper
System:
The Portal to Texas History
The Dublin Citizen (Dublin, Tex.), Vol. 15, No. 22, Ed. 1 Thursday, January 27, 2005
Weekly newspaper from Dublin, Texas that includes local, state, and national news along with advertising.
Date:
January 27, 2005
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Durability and Reliability of Solid Oxide Fuel Cells
This presentation discusses durability and reliability testing on solid oxide fuel cells.
Date:
January 27, 2005
Creator:
Lara-Curzio, E.
Object Type:
Presentation
System:
The UNT Digital Library
The E-Rate Program: Universal Service Fund Telecommunications Discounts for Schools
None
Date:
January 27, 2006
Creator:
McCallion, Gail
Object Type:
Report
System:
The UNT Digital Library
Early Childhood Education: Federal Policy Issues
None
Date:
January 27, 2003
Creator:
McCallion, Gail
Object Type:
Report
System:
The UNT Digital Library
EARLY ENTRANCE COPRODUCTION PLANT
The overall objective of this project is the three phase development of an Early Entrance Coproduction Plant (EECP) which uses petroleum coke to produce at least one product from at least two of the following three categories: (1) electric power (or heat), (2) fuels, and (3) chemicals using ChevronTexaco's proprietary gasification technology. The objective of Phase I is to determine the feasibility and define the concept for the EECP located at a specific site; develop a Research, Development, and Testing (RD&T) Plan to mitigate technical risks and barriers; and prepare a Preliminary Project Financing Plan. The objective of Phase II is to implement the work as outlined in the Phase I RD&T Plan to enhance the development and commercial acceptance of coproduction technology. The objective of Phase III is to develop an engineering design package and a financing and testing plan for an EECP located at a specific site. The project's intended result is to provide the necessary technical, economic, and environmental information needed by industry to move the EECP forward to detailed design, construction, and operation. The partners in this project are Texaco Energy Systems LLC or TES (a subsidiary of ChevronTexaco), General Electric (GE), Praxair, and Kellogg Brown …
Date:
January 27, 2004
Creator:
Brent, Fred D.; Shah, Lalit; Berry, Earl; Schrader, Charles H.; Anderson, John; He, Ming et al.
Object Type:
Report
System:
The UNT Digital Library
Effect of a plume reduction in segmented electrode Hall thruster
A segmented electrode, which is placed at the thruster exit, is shown to affect thruster operation in several ways, whether the electrode produce low emission current or no emission current, although there appear to be advantages to the more emissive segmented electrode. Measured by plume divergence, the performance of Hall thruster operation, even with only one power supply, can approach or surpass that of non segmented operation over a range of parameter regimes, including the low gas rate regime. This allows the flexibility in operation of segmented electrode thrusters in variable thrust regimes.
Date:
January 27, 2000
Creator:
Raitses, Y.; Dorf, L. A.; Livak, A. A. & Fisch, N. J.
Object Type:
Report
System:
The UNT Digital Library
Effect of Sulfur and Hydrocarbon Fuels on Titanate/Ceria SOFC Anodes
The purpose of the project is to develop low-cost, high-performance anodes that offer low polarization resistance as well as improved tolerance for nonidealities in anode environment such as redox cycles, sulfur and other poisons, and hydrocarbons.
Date:
January 27, 2005
Creator:
Marina, O.A.; Pedersen, L.R. & Stevenson, J.W.
Object Type:
Presentation
System:
The UNT Digital Library
Electra Star-News (Electra, Tex.), Vol. 93, No. 24, Ed. 1 Thursday, January 27, 2000
Weekly newspaper from Electra, Texas that includes local, state, and national news along with advertising.
Date:
January 27, 2000
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Electra Star-News (Electra, Tex.), Vol. 98, No. 24, Ed. 1 Thursday, January 27, 2005
Weekly newspaper from Electra, Texas that includes local, state, and national news along with advertising.
Date:
January 27, 2005
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Electrochemical in-situ reaction cell for X-ray scattering, diffraction and spectroscopy
An electrochemical in-situ reaction cell for hard X-ray experiments with battery electrodes is described. Applications include the small angle scattering, diffraction, and near-edge spectroscopy of lithium manganese oxide electrodes.
Date:
January 27, 2003
Creator:
Braun, Artur; Granlund, Eric & Cairns, Elton J.
Object Type:
Article
System:
The UNT Digital Library
Enforcing Immigration Law: The Role of State and Local Law Enforcement
This report provides information about The Role of State and Local Law Enforcement on Enforcing Immigration Law.
Date:
January 27, 2006
Creator:
Seghetti, Lisa M.; Viña, Stephen R. & Ester, Karma
Object Type:
Report
System:
The UNT Digital Library