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Insulated Concrete Homes Increase Durability and Energy Efficiency
New houses designed by Mercedes Homes in Melbourne, Florida, with technical support from the U.S. Department of Energy's Building America Program, save their homeowners money by using energy efficient features such as a high performance heat pump and solar control glazing to reduce cooling costs.
Date:
June 5, 2001
Creator:
America, Building; Hendron, B. & Poole, L.
Object Type:
Book
System:
The UNT Digital Library
Unvented Attic Increases Energy Efficiency and Reduces Duct Losses - Sun Lake at Banning, California
New houses in the Sun Lakes at Banning subdivision are designed by Pulte Homes with technical support from the Building Science Consortium as part of the U.S. Department of Energy's Building America Program. These homes save their homeowners money by applying the principles of ''whole-building'' design, which considers the house as a complete system instead of separate components.
Date:
September 5, 2001
Creator:
Anderson, R. & Wells, N.
Object Type:
Book
System:
The UNT Digital Library
CO-FIRING COAL: FEEDLOT AND LITTER BIOMASS FUELS
The following are proposed activities for quarter 2 (9/15/00-12/14/00): (1) Conduct TGA and fuel characterization studies--Task 1; (2) Perform re-burn experiments--Task 2; (3) Fabricate fixed bed gasifier/combustor--Task 3; and (4) Modify the 3D combustion modeling code for feedlot and litter fuels--Task 4. The following were achieved During Quarter 2 (9/15/00-12/14/00): (1) The chicken litter has been obtained from Sanderson farms in Denton, after being treated with a cyclonic dryer. The litter was then placed into steel barrels and shipped to California to be pulverized in preparation for firing. Litter samples have also been sent for ultimate/proximate laboratory analyses.--Task 1; (2) Reburn-experiments have been conducted on coal, as a base case for comparison to litter biomass. Results will be reported along with litter biomass as reburn fuel in the next report--Task 2; (3) Student has not yet been hired to perform task 3. Plans are ahead to hire him or her during quarter No. 3; and (4) Conducted a general mixture fraction model for possible incorporation in the code.
Date:
February 5, 2001
Creator:
Annamalai, Dr. Kalyan; Sweeten, Dr. John & Mukhtar, Dr. Sayeed
Object Type:
Report
System:
The UNT Digital Library
Atmospheric Radiation Measurement Program Facilities Newsletter, January 2001.
Monthly newsletter discussing news and activities related to the Atmospheric Radiation Measurement Program, articles about weather and atmospheric phenomena, and other related topics.
Date:
February 5, 2001
Creator:
Atmospheric Radiation Measurement Program (U.S.)
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
AN INTEGRATED RELAP5-3D AND MUTLIPHASE CFD CODE SYSTEM UTILIZING A SEMI-implicit coupling technique
An integrated code system consisting of RELAP5-3D and a multiphase CFD program has been created through the use of a generic semi-implicit coupling algorithm. Unlike previous CFD coupling work, this coupling scheme is numerically stable provided the material Courant limit is not violated in RELAP5-3D or at the coupling locations. The basis for the coupling scheme and details regarding the unique features associated with the application of this technique to a four-field CFD program are presented. Finally, the results of a verification problem are presented. The coupled code system is shown to yield accurate and numerically stable results.
Date:
September 5, 2001
Creator:
Aumiller, D.L., Tomlinson, E.T., and Weaver, W.L.
Object Type:
Report
System:
The UNT Digital Library
Exploitation of parallelism in climate models. Final report
This final report includes details on the research accomplished by the grant entitled 'Exploitation of Parallelism in Climate Models' to the University of Maryland. The purpose of the grant was to shed light on (a) how to reconfigure the atmospheric prediction equations such that the time iteration process could be compressed by use of MPP architecture; (b) how to develop local subgrid scale models which can provide time and space dependent parameterization for a state-of-the-art climate model to minimize the scale resolution necessary for a climate model, and to utilize MPP capability to simultaneously integrate those subgrid models and their statistics; and (c) how to capitalize on the MPP architecture to study the inherent ensemble nature of the climate problem. In the process of addressing these issues, we created parallel algorithms with spectral accuracy; we developed a process for concurrent climate simulations; we established suitable model reconstructions to speed up computation; we identified and tested optimum realization statistics; we undertook a number of parameterization studies to better understand model physics; and we studied the impact of subgrid scale motions and their parameterization in atmospheric models.
Date:
February 5, 2001
Creator:
Baer, Ferdinand; Tribbia, Joseph J. & Williamson, David L.
Object Type:
Report
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 31, No. 5, Ed. 1 Friday, October 5, 2001
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
October 5, 2001
Creator:
Baldwin, Alisha
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Endangered Species Act: Consideration of Economic Factors
The Endangered Species Act (ESA) provides for the listing and protection of species that are found to be “endangered” or “threatened” – species that might become extinct. The listing of a species as endangered triggers the prohibitions in the Act against “taking” (killing or harming) individuals of the protected species, unless a permit is obtained to take individuals incidental to an otherwise lawful proposed action, or an exemption for the proposed action is obtained. Unauthorized taking of a listed species can result in civil or criminal penalties. These prohibitions and potential penalties can affect various activities, including development and use of land, with attendant economic impacts.
Date:
January 5, 2001
Creator:
Baldwin, Pamela
Object Type:
Report
System:
The UNT Digital Library
Intermittent Turbulence in the Very Stable Ekman Layer
INTERMITTENT TURBULENCE IN THE VERY STABLE EKMAN LAYER This study describes a Direct Numerical Simulation (DNS) of a very stable Ekman layer in which a constant downward heat flux is applied at the lower boundary, thus cooling the fluid above. Numerical experiments were performed in which the strength of the imposed heat flux was varied. For downward heat fluxes above a certain critical value the turbulence becomes intermittent and, as the heat flux increases beyond this value, the flow tends to relaminarize because of the very strong ambient stratification. We adopt Mahrt?s (1999) definition of the very stable boundary layer as a boundary layer in which intermittent, rather than continuous turbulence, is observed. Numerical experiments were used to test various hypothesis of where in ?stability parameter space? the very stable boundary layer is found. These experiments support the findings of Howell and Sun (1999) that the boundary layer will exhibit intermittency and therefore be categorized as ?very stable?, when the stability parameter, z/L, exceeds unity. Another marker for the very stable boundary layer, Derbyshire?s (1990) maximum heat flux criterion, was also examined. Using a case study drawn from the simulations where turbulence intermittency was observed, the mechanism that causes the …
Date:
January 5, 2001
Creator:
Barnard, James C.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Low Power FM Radio Service: Regulatory and Congressional Issues
None
Date:
January 5, 2001
Creator:
Bass, Gwenell L. & Nunno, Richard M.
Object Type:
Report
System:
The UNT Digital Library
The Colony Courier-Leader (The Colony, Tex.), Vol. 20, No. 21, Ed. 1 Thursday, July 5, 2001
Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date:
July 5, 2001
Creator:
Beesley, Tom
Object Type:
Newspaper
System:
The Portal to Texas History
Development of simulation tools for virus shell assembly. Final report
Prof. Berger's major areas of research have been in applying computational and mathematical techniques to problems in biology, and more specifically to problems in protein folding and genomics. Significant progress has been made in the following areas relating to virus shell assembly: development has been progressing on a second-generation self-assembly simulator which provides a more versatile and physically realistic model of assembly; simulations are being developed and applied to a variety of problems in virus assembly; and collaborative efforts have continued with experimental biologists to verify and inspire the local rules theory and the simulator. The group has also worked on applications of the techniques developed here to other self-assembling structures in the material and biological sciences. Some of this work has been conducted in conjunction with Dr. Sorin Istrail when he was at Sandia National Labs.
Date:
January 5, 2001
Creator:
Berger, Bonnie
Object Type:
Report
System:
The UNT Digital Library
A Third Generation Lower Hybrid Coupler
The Princeton Plasma Physics Laboratory (PPPL) and the Massachusetts Institute of Technology (MIT) are preparing an experiment of current profile control using lower-hybrid waves in order to produce and sustain advanced tokamak regimes in steady-state conditions in Alcator C-Mod. Unlike JET's, ToreSupra's and JT60's couplers, the C-Mod lower-hybrid coupler does not employ the now conventional multijunction design, but will have similar characteristics, compactness, and internal power division while retaining full control of the antenna element phasing. This is achieved by using 3 dB vertical power splitters and a stack of laminated plates with the waveguides milled in them. Construction is simplified and allows easy control and maintenance of all parts. Many precautions are taken to avoid arcing. Special care is also taken to avoid the recycling of reflected power which could affect the coupling and the launched n(subscript ||) spectrum. The results from C-Mod should allow further simplification in the designs of the coupler planned for KSTAR (Korea Superconducting Tokamak Advanced Research) and ITER (International Thermonuclear Experimental Reactor).
Date:
December 5, 2001
Creator:
Bernabei, S.; Hosea, J.; Kung, C.; Loesser, D.; Rushinski, J.; Wilson, J. R. et al.
Object Type:
Report
System:
The UNT Digital Library
Economical Recovery of By-products in the Mining Industry
The U.S. Department of Energy (DOE) Office of Industrial Technologies, Mining Industry of the Future Program, works with the mining industry to further the industry's advances toward environmental and economic goals. Two of these goals are (1) responsible emission and by-product management and (2) low-cost and efficient production (DOE 1998). DOE formed an alliance with the National Mining Association (NMA) to strengthen the basis for research projects conducted to benefit the mining industry. NMA and industry representatives actively participate in this alliance by evaluating project proposals and by recommending research project selection to DOE. Similarly, the National Research Council (NRC) has recently and independently recommended research and technology development opportunities in the mining industry (NRC 2001). The Oak Ridge National Laboratory (ORNL) and Colorado School of Mines engineers conducted one such project for DOE regarding by -product recovery from mining process residue. The results of this project include this report on mining industry process residue and waste with opportunity for by-product recovery. The U.S. mineral processing industry produces over 30,000,000 metric tons per year of process residue and waste that may contain hazardous species as well as valuable by-products. This study evaluates the copper, lead, and zinc commodity sectors which …
Date:
December 5, 2001
Creator:
Berry, J.B.
Object Type:
Report
System:
The UNT Digital Library
Effusive-flow characterization of arbitrary size and geometry target/vapor transport systems: radioactive ion beam applications
The principal factors that severely limit intensities of short-lived radioactive ion beams produced by the Isotope Separator On-Line (ISOL) technique are time delays due to diffusion of radioactive species from solid or liquid target materials and their effusive-flow transport to the ion source. Although diffusion times can be reduced by proper design of short diffusion length, highly refractory targets, effusive-flow times are more difficult to assess. After diffusion from the target material, the species must travel through the target material and vapor transport system to the ion source. The time required for effusive-flow transport to the ion source depends on the conduction path, chemical reactions between the species and target material and materials of construction as well as the physical size and geometry of the transport system. We have developed a fast-valve (1 ms closing time) for introducing gaseous or vapor-state species into the target/vapor transport/ion source/system th at permits measurement of effusive-flow times for any gaseous or vaporous species (chemically active or chemically inactive) through any vapor transport system, independent of size and geometry. Characteristic times are determined from the exponential decay of the momentum analyzed ion beam intensity for the species.during effusive-flow through the vapor transport system under …
Date:
November 5, 2001
Creator:
Bilheux, J.-C.
Object Type:
Article
System:
The UNT Digital Library
Area Monitoring Dosimeter Program for the Pacific Northwest National Laboratory: Results for CY 2000
Pacific Northwest National Laboratory (PNNL) established an area monitoring dosimeter program in accordance with Article 514 of the Department of Energy (DOE) Radiological Control Manual (RCM) in January 1993. This program is to minimize the number of areas requiring issuance of personnel dosimeters and to demonstrate that doses outside Radiological Buffer Areas are negligible. In accordance with 10 CFR Part 835.402 (a) (1)-(4) and Article 511.1 of the DOE Standard Radiological Control, personnel dosimetry shall be provided to (1) radiological workers who are likely to receive at least 100 mrem annually, and (2) declared pregnant workers, minors, and members of the public who are likely to receive at least 50 mrem annually. Program results for calendar years 1993-2000 confirm that personnel dosimetry is not needed for individuals located in areas monitored by the program.
Date:
July 5, 2001
Creator:
Bivins, Steven R & Stoetzel, Gregory A
Object Type:
Report
System:
The UNT Digital Library
Area Monitoring Dosimeter Program for the Pacific Northwest National Laboratory: Results for CY 2000
Pacific Northwest National Laboratory (PNNL) established an area monitoring dosimeter program in accordance with Article 514 of the Department of Energy (DOE) Radiological Control Manual (RCM) in January 1993. This program is to minimize the number of areas requiring issuance of personnel dosimeters and to demonstrate that doses outside Radiological Buffer Areas are negligible. In accordance with 10 CFR Part 835.402 (a) (1)-(4) and Article 511.1 of the DOE Standard Radiological Control, personnel dosimetry shall be provided to 1) radiological workers who are likely to receive at least 100 mrem annually, and 2) declared pregnant workers, minors, and members of the public who are likely to receive at least 50 mrem annually. Program results for calendar years 1993-2000 confirm that personnel dosimetry is not needed for individuals located in areas monitored by the program.
Date:
July 5, 2001
Creator:
Bivins, Steven R. & Stoetzel, Gregory A.
Object Type:
Report
System:
The UNT Digital Library
Analysis of Geomechanical Behavior for the Drift Scale Test
The Drift Scale Test (DST) now underway at Yucca Mountain has been simulated using a Drift Scale Distinct Element (DSDE) model. Simulated deformations show good agreement with field deformation measurements. Results indicate most fracture deformation is located above the crown of the Heated Drift. This work is part of the model validation effort for the DSDE model, which is used to assess thermal-mechanical effects on the hydrology of the rock mass surrounding a potential repository.
Date:
March 5, 2001
Creator:
Blair, S. C.; Carlson, S. R. & Wagoner, J. L.
Object Type:
Article
System:
The UNT Digital Library
Analysis of Geomechanical Behavior for the Drift Scale Test
The Drift Scale Test (DST) now underway at Yucca Mountain has been simulated using a Drift Scale Distinct Element (DSDE) model. Simulated deformations show good agreement with field deformation measurements. Results indicate most fracture deformation is located above the crown of the Heated Drift. This work is part of the model validation effort for the DSDE model, which is used to assess thermal-mechanical effects on the hydrology of the rock mass surrounding a potential repository.
Date:
March 5, 2001
Creator:
Blair, S.C.; Carlson, S.R. & Wagoner, J.L.
Object Type:
Article
System:
The UNT Digital Library
Geothermal Energy--Heat from the Earth: Idaho
General use fact sheet about geothermal energy in Idaho. Idaho holds enormous resources - among the largest in the United States - of this clean, reliable form of energy that to date have barely been tapped.
Date:
November 5, 2001
Creator:
Boddy, S.
Object Type:
Book
System:
The UNT Digital Library
F-22 Raptor Aircraft Program
This report discusses the background information, analysis and the recent developments in the F-22 Raptor Aircraft Program. The F-22 program raises questions about its cost and the need for this aircraft, the capabilities it would have, and the number of these planes needed to meet military requirements. The F-22 has had strong congressional support, although some have criticized the program on grounds of cost, requirements, and coordination with other tactical aircraft programs. Deletion of procurement funds in the FY2000 defense appropriation bill passed by the House made the future of the program a major issue for House and Senate conferees in 1999.
Date:
November 5, 2001
Creator:
Bolkcom, Christopher
Object Type:
Report
System:
The UNT Digital Library
Tactical Aircraft Modernization: Issues for Congress
None
Date:
November 5, 2001
Creator:
Bolkcom, Christopher
Object Type:
Report
System:
The UNT Digital Library
V-22 Osprey Tilt-Rotor Aircraft
The V-22 Osprey is a tilt-rotor aircraft that takes off and lands vertically like a helicopter and flies like a plane by tilting its wing-mounted rotorsto function as propellers. Combining a helicopter’s operational flexibility with the greaterspeed,range, and efficiency of fixed-wing aircraft, the V-22 can perform such missions astroop/cargo transport, amphibious assault, special operations, and search and rescue operations.
Date:
November 5, 2001
Creator:
Bolkcom, Christopher
Object Type:
Report
System:
The UNT Digital Library
Grandview Tribune (Grandview, Tex.), Vol. 106, No. 20, Ed. 1 Friday, January 5, 2001
Weekly newspaper from Grandview, Texas that includes local, state, and national news along with advertising.
Date:
January 5, 2001
Creator:
Bosher, Casey & Marten, Donna K.
Object Type:
Newspaper
System:
The Portal to Texas History