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Proceedings of the NETL Workshop on Fuel Cell Modeling
This workshop was the first U.S. DOE sponsored meeting devoted to fuel cell modeling. The workshop was attended by over 45 people from industry, universities, and the government. The goals of the meeting were to assess the status of fuel cell modeling, and determine how new developments in fuel cell modeling can improve cell design, stack design, and power system design. The primary focus was on cell and stack modeling. Following a review of DOE/NETL fuel cell related programs and activities, Professor Robert Selman (Illinois Institute of Technology) kicked off the technical portion of the workshop by presenting an overview of fuel cell phenomena and the status of fuel cell modeling. This overview provided the necessary background for establishing a common framework for discussing fuel cell modeling. A distinction was made between micro modeling, electrode modeling, cell modeling, stack modeling, and system modeling. It was proposed that all modeling levels be supported for further development. In addition, due to significant advances being made outside the U.S., it was proposed that dialog/exchange with other international researchers be established. Following the Overview Session, eight leading researchers in modeling gave individual presentations. These presentations provided additional information on the status and present direction …
Date:
April 18, 2000
Creator:
Gemmen, Randall S. & Selman, J. R.
Object Type:
Report
System:
The UNT Digital Library
Quarterly Progress Report - Biological Monitoring Program for East Fork Poplar Creek
In May 1985, a National Pollutant Discharge Elimination System (NPDES) permit was issued for the Oak Ridge Y-12 Plant. As a condition of the permit, a Biological Monitoring and Abatement Program (BMAP) was developed to demonstrate that the effluent limitations established for the Y-12 Plant protect the classified uses of the receiving stream (East Fork Poplar Creek; EFPC), in particular, the growth and propagation of aquatic life (Loar et al. 1989). A second objective of the BMAP is to document the ecological effects resulting from the implementation of a water pollution control program designed to eliminate direct discharges of wastewaters to EFPC and to minimize the inadvertent release of pollutants to the environment. Because of the complex nature of the discharges to EFPC and the temporal and spatial variability in the composition of the discharges, a comprehensive, integrated approach to biological monitoring was developed. A new permit was issued to the Y-12 Plant on April 28, 1995 and became effective on July 1, 1995. Biological monitoring continues to be required under the new permit. The BMAP consists of four major tasks that reflect different but complementary approaches to evaluating the effects of the Y-12 Plant discharges on the aquatic integrity …
Date:
April 18, 2000
Creator:
Adams, S. M.; Christensen, S. W.; Greeley, M. S. Jr.; Hill, W. R.; McCarthy, J. F.; Peterson, M. J. et al.
Object Type:
Report
System:
The UNT Digital Library
Rains County Leader (Emory, Tex.), Vol. 112, No. 44, Ed. 1 Tuesday, April 18, 2000
Weekly newspaper from Emory, Texas that includes local, state, and national news along with advertising.
Date:
April 18, 2000
Creator:
Hill, Earl Clyde, Jr.
Object Type:
Newspaper
System:
The Portal to Texas History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 84, No. 186, Ed. 1 Tuesday, April 18, 2000
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 18, 2000
Creator:
Quinnelly, Lorrie J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Single transverse mode selectively oxidized vertical cavity lasers
Vertical cavity surface emitting laser (VCSEL) sources have been adopted into Gigabit Ethernet applications in a remarkably short time period. VCSELs are particularly suitable for multimode optical fiber local area networks (LANs), due to their reduced threshold current, circular output beam, and inexpensive and high volume manufacture. Moreover, selectively oxidized VCSELs are nearly ideal LAN sources since the oxide aperture within the laser cavity produces strong electrical and optical confinement which enables high electrical to optical conversion efficiency and minimal modal discrimination allowing emission into multiple transverse optical modes. In addition to the large demand for multimode lasers, VCSELs which emit into a single optical mode are also increasingly sought for emerging applications, which include data communication with single mode optical fiber, bar code scanning, laser printing, optical read/write heads, and modulation spectroscopy. To achieve single mode selectively oxidized VCSELs is a challenging task, since the inherent index confinement within these high performance lasers is very large.
Date:
April 18, 2000
Creator:
CHOQUETTE,KENT D.
Object Type:
Article
System:
The UNT Digital Library
Supplement to Interim Report on Task 1.3: Equilibrium Phase Diagram to Lawrence Livermore National Laboratory under Contract B345772
This report contains a summary of the results generated so far on the CaHfTi{sub 2}O{sub 7}-Gd{sub 2}Ti{sub 2}O{sub 7} System.
Date:
April 18, 2000
Creator:
Stewart, M W A; Vance, E R & Day, R A
Object Type:
Report
System:
The UNT Digital Library
System Description for the KW Basin Integrated Water Treatment System (IWTS) (70.3)
This is a description of the system that collects and processes the sludge and radioactive ions released by the spent nuclear fuel (SNF) processing operations conducted in the 105 KW Basin. The system screens, settles, filters, and conditions the basin water for reuse. Sludge and most radioactive ions are removed before the water is distributed back to the basin pool. This system is part of the Spent Nuclear Fuel Project (SNFP).
Date:
April 18, 2000
Creator:
DERUSSEAU, R.R.
Object Type:
Report
System:
The UNT Digital Library
Using High-Speed WANs and Network Data Caches to Enable Remote and Distributed Visualization
Visapult is a prototype application and framework for remote visualization of large scientific datasets. We approach the technical challenges of tera-scale visualization with a unique architecture that employs high speed WANs and network data caches for data staging and transmission. This architecture allows for the use of available cache and compute resources at arbitrary locations on the network. High data throughput rates and network utilization are achieved by parallelizing I/O at each stage in the application, and by pipe-lining the visualization process. On the desktop, the graphics interactivity is effectively decoupled from the latency inherent in network applications. We present a detailed performance analysis of the application, and improvements resulting from field-test analysis conducted as part of the DOE Combustion Corridor project.
Date:
April 18, 2000
Creator:
Bethel, Wes; Lau, Stephen; Tierney, Brian; Lee, Jason & Gunter, Dan
Object Type:
Article
System:
The UNT Digital Library
Wavelength dependent measurements of optical fiber transit time, material dispersion, and attenuation
A new method for measuring the wavelength dependence of the transit time, material dispersion, and attenuation of an optical fiber is described. The authors inject light from a 4-ns risetime pulsed broad-band flashlamp into various length fibers and record the transmitted signals with a time-resolved spectrograph. Segments of data spanning an approximately 3,000 {angstrom} range are recorded from a single flashlamp pulse. Comparison of data acquired with short and long fibers enables the determination of the transit time and the material dispersion as functions of wavelength dependence for the entire recorded spectrum simultaneously. The wavelength dependent attenuation is also determined from the signal intensities. The method is demonstrated with experiments using a step index 200-{micro}m-diameter SiO{sub 2} fiber. The results agree with the transit time determined from the bulk glass refractive index to within {+-} 0.035% for the visible (4,000--7,200 {angstrom}) spectrum and 0.12% for the ultraviolet (2,650--4,000 {angstrom}) spectrum, and with the attenuation specified by the fiber manufacturer to within {+-} 10%.
Date:
April 18, 2000
Creator:
COCHRANE,KYLE ROBERT; BAILEY,JAMES E.; LAKE,PATRICK WAYNE & CARLSON,ALAN L.
Object Type:
Article
System:
The UNT Digital Library
African Development Bank and Fund
The African Development Bank Group, including the Bank itself (AfDB) and its “soft-loan” affiliate, the African Development Fund (AfDF), is a development finance institution based in Abidjan, Côte d’Ivoire. The Bank has 53 African members, as well as 24 non-regional members, including the United States. In the mid-1990s, the Bank faced management problems and difficulties arising from non-performing loans, but reforms launched in 1995 by a new Bank president, Omar Kabbaj, brought new pledges of support from the non-regionals. U.S. contributions to the Fund resumed in FY1998 and to the Bank in FY2000. This report will be updated as events warrant.
Date:
April 18, 2001
Creator:
Copson, Raymond W.
Object Type:
Report
System:
The UNT Digital Library
Alternative Fuel News: Official Publication of the U.S. Department of Energy's Clean Cities Network and the Alternative Fuels Data Center; Vol. 5, No. 1
A quarterly magazine with articles on recent changes to the Clean Cities Program; the SuperTruck student engineering challenge; alternative fuel use in delivery fleets; and a propane vehicle rally and conference in February 2001, in Kansas City, Mo.
Date:
April 18, 2001
Creator:
LaRocque, T.
Object Type:
Book
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 102, No. 30, Ed. 1 Wednesday, April 18, 2001
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 18, 2001
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Advertiser (Alvin, Tex.), Ed. 1 Wednesday, April 18, 2001
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
April 18, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 79, No. 143, Ed. 1 Wednesday, April 18, 2001
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
April 18, 2001
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 106, No. 31, Ed. 1 Wednesday, April 18, 2001
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
April 18, 2001
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
[Clipping: Welcome to Molly's World - 1944]
Copy of a magazine about women's participation in World War II aviation.
Date:
April 18, 2001
Creator:
unknown
Object Type:
Clipping
System:
The Portal to Texas History
The Collegian (Hurst, Tex.), Vol. 13, No. 24, Ed. 1 Wednesday, April 18, 2001
Weekly student newspaper published in Hurst, Texas and serving the Tarrant County College District that includes school news and information along with advertising.
Date:
April 18, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Crafting a Common Vision for the Off-Highway Vehicles of the Future
None
Date:
April 18, 2001
Creator:
Eberhardt, James J.
Object Type:
Presentation
System:
The UNT Digital Library
Daily Journal (Perry, Okla.), Vol. 108, No. 77, Ed. 1 Wednesday, April 18, 2001
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 18, 2001
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
DOD Personnel: More Consistency Needed in Determining Eligibility for Top Secret Security Clearances
A chapter report issued by the General Accounting Office with an abstract that begins "Each year, the Department of Defense (DOD) makes about 200,000 decisions to grant, deny, or revoke security clearances for its civilian, military, and contractor personnel. Through a process called adjudication, DOD personnel security specialists review the results of employees' background investigations and determine whether the individual is eligible for a clearance. This report (1) assesses whether DOD's adjudicators consistently document all significant adverse security conditions when determining individuals' eligibility for top secret security clearances and (2) identifies factors that hinder the effectiveness of DOD's adjudicative process. GAO found that DOD adjudicators have not consistently documented all significant adverse security conditions present in investigative case files when determining individuals' eligibility for top secret security clearances. DOD has been unable to demonstrate that it fully considered all significant adverse conditions often not documented, including financial matters. Several factors have hindered the effectiveness of DOD's adjudicative process. The Assistant Secretary has not (1) used common explanatory guidance, such as that contained in the Adjudicative Desk Reference he developed, or issued any other clarifying guidance to promote consistency in applying the federal guidelines; (2) required adjudicators to take DOD adjudicative …
Date:
April 18, 2001
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Effect of hydrostatic pressure on degradation of CdTe/CdMgTeheterostructures grown by molecular beam epitaxy on GaAs substrates
We have shown that external hydrostatic pressure leads to the creation of structural defects, mainly in the vicinity of the II-VI/GaAs interface in the CdTe/Cd{sub 1-x}Mg{sub x}Te heterostructures grown by the molecular beam epitaxy method on GaAs substrates. These defects propagating across the epilayer cause permanent damage to the samples from the point of view of their electrical properties. In contrast, photoluminescence spectra are only weakly influenced by pressure. Our results shed light on the degradation process observed even without pressure in II-VI-based heterostructures.
Date:
April 18, 2001
Creator:
Wasik, D.; Baj, M.; Siwiec-Matuszyk, J.; Gronkowski, J.; Jasinski, J. & Karczewski, G.
Object Type:
Article
System:
The UNT Digital Library
Effects of annealing on self-assembled InAs quantum dots and wetting layer in GaAs matrix
Post-growth thermal annealing effects on InAs/GaAs quantum dots (QDs) near Stransky-Krastanow transformation were investigated. Self-assembled QDs of average size of about 10 nm were grown by metal organic vapour phase epitaxy. The photoluminescence (PL) due to emission from QDs as well as two peaks due to emission from the strained InAs wetting layer (WL) were observed in as-grown samples. Bimodal structure of the WL PL was attributed to WL regions of different thickness. There was almost no difference in the PL spectrum after 30 s annealing at 600 C. However, annealing at temperatures in the range between 700 C and 950 C resulted in quenching of the PL from QDs and the thinner WL. The PL peak from the new, thicker WL blue-shifted and narrowed with increasing annealing temperature. This behavior was in agreement with TEM observations. Complete dissolution of the QDs and substantial broadening of the WL was observed. All our results indicate that thermally induced modifications of the WL rather than QDs can be responsible for the blue-shift and narrowing of the PL peaks in structures containing InAs QDs.
Date:
April 18, 2001
Creator:
Jasinski, J.; Babinski, A.; Bozek, R.; Szepielow, A. & Baranowski, J. M.
Object Type:
Article
System:
The UNT Digital Library
Effects of annealing on self-assembled InAs quantum dots and wetting layer in GaAs matrix
Post-growth thermal annealing effects on InAs/GaAs quantum dots (QDs) near Stransky-Krastanow transformation were investigated. Self-assembled QDs of average size of about 10 nm were grown by metal-organic vapor phase epitaxy. The photoluminescence (PL) due to emission from QDs as well as two peaks due to emission from the strained InAs wetting layer (WL) were observed in as-grown samples. Bimodal structure of the WL PL was attributed to WL regions of different thickness. There was almost no difference in the PL spectrum after 30 s annealing at 600 C. However, annealing at temperatures in the range between 700 C and 950 C resulted in quenching of the PL from QDs and the thinner WL. The PL peak from the new, thicker WL blue-shifted and narrowed with increasing annealing temperature. This behavior was in agreement with TEM observations. Complete dissolution of the QDs and substantial broadening of the WL was observed. All our results indicate that thermally induced modifications of the WL rather than QDs can be responsible for the blue-shift and narrowing of the PL peaks in structures containing InAs QDs.
Date:
April 18, 2001
Creator:
Jasinski, J.; Babinski, A.; Bozek, R.; Szepielow, A. & Baranowski, J. M.
Object Type:
Article
System:
The UNT Digital Library
EPA Nonroad Vehicle and Engine Program
None
Date:
April 18, 2001
Creator:
Jackson, Cleophas
Object Type:
Presentation
System:
The UNT Digital Library