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UNT Libraries Government Documents Department
331
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74
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36
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18
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12
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5
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5
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247
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81
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47
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43
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30
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30
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20
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18
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Year
Month
Day
Language
Nuclear Materials Identification System Operational Manual
This report describes the operation and setup of the Nuclear Materials Identification System (NMIS) with a {sup 252}Cf neutron source at the Oak Ridge Y-12 Plant. The components of the system are described with a description of the setup of the system along with an overview of the NMIS measurements for scanning, calibration, and confirmation of inventory items.
Date:
April 10, 2001
Creator:
Chiang, L. G.
Object Type:
Report
System:
The UNT Digital Library
Interior Duct System Design, Construction, and Performance
By removing air distribution and conditioning equipment from unconditioned spaces, homeowners stand to benefit substantially with respect to both energy savings and indoor air quality. Duct leakage introduces: Greater heating and cooling loads from air at extreme temperatures and humidity levels; Outside air and air from unconditioned spaces that may contain air borne contaminants, combustion gases, pollen, mold spores, and/or particles of building materials; and Higher whole-house infiltration/exfiltration rates. Exemplary studies conducted since 1990 have demonstrated the prevalence of duct leakage throughout the United States and measured energy savings of approximately 20% during both heating and cooling seasons from leakage reduction. These all dealt with duct leakage to and/or from unconditioned spaces. In the building science community, leakage within the conditioned space is generally presumed to eliminate the negative consequences of duct leakage with the exception of possibly creating pressure imbalances in the house which relates to higher infiltration and/or exfiltration. The practical challenges of isolating ducts and air handlers from unconditioned spaces require builders to construct an air-tight environment for the ducts. Florida Solar Energy Center researchers worked with four builders in Texas, North Carolina, and Florida who build a furred-down chase located either in a central hallway or …
Date:
October 10, 2001
Creator:
Mcllvaine, Janet E.R.; Beal, David & Fairey, Philip
Object Type:
Report
System:
The UNT Digital Library
CALCIUM CARBONATE PRODUCTION BY COCCOLITHOPHORID ALGAE IN LONG TERM, CARBON DIOXIDE SEQUESTRATION
Predictions of increasing levels of anthropogenic carbon dioxide (CO{sub 2}) and the specter of global warming have intensified research efforts to identify ways to sequester carbon. A number of novel avenues of research are being considered, including bioprocessing methods to promote and accelerate biosequestration of CO{sub 2} from the environment through the growth of organisms such as coccolithophorids, which are capable of sequestering CO{sub 2} relatively permanently. Calcium and magnesium carbonates are currently the only proven, long-term storage reservoirs for carbon. Whereas organic carbon is readily oxidized and releases CO{sub 2} through microbial decomposition on land and in the sea, carbonates can sequester carbon over geologic time scales. This proposal investigates the use of coccolithophorids--single-celled, marine algae that are the major global producers of calcium carbonate--to sequester CO{sub 2} emissions from power plants. Cultivation of coccolithophorids for calcium carbonate (CaCO{sub 3}) precipitation is environmentally benign and results in a stable product with potential commercial value. Because this method of carbon sequestration does not impact natural ecosystem dynamics, it avoids controversial issues of public acceptability and legality associated with other options such as direct injection of CO{sub 2} into the sea and ocean fertilization. Consequently, cultivation of coccolithophorids could be carried …
Date:
September 10, 2001
Creator:
V.J. Fabry, Ph.D.
Object Type:
Report
System:
The UNT Digital Library
MINIMIZATION OF CARBON LOSS IN COAL REBURNING
This project develops Fuel-Flexible Reburning (FFR), which combines conventional reburning and Advanced Reburning (AR) technologies with an innovative method of delivering coal as the reburning fuel. The overall objective of this project is to develop engineering and scientific information and know-how needed to improve the cost of reburning via increased efficiency and minimized carbon-in-ash and move the FFR technology to the demonstration and commercialization stage. The first reporting period (August 11, 2000-February 10, 2001) included experimental activities with the primary objective to characterize the impacts of reburning process parameters on NO{sub x} reduction at conditions typical of the full-scale boilers. Tests were conducted in GE EER's Boiler Simulator Facility (BSF). Tests showed that NO{sub x} reduction in basic coal reburning depends on process conditions, initial NO{sub x} and coal type. Up to 60% NO{sub x} reduction was achieved at optimized conditions.
Date:
February 10, 2001
Creator:
Zamansky, Vladimir M. & Lissianski, Vitali V.
Object Type:
Report
System:
The UNT Digital Library
DNA-PKcs is critical for telomere capping
The DNA-dependent protein kinase catalytic subunit (DNA-PKcs) is critical for DNA repair via the non-homologous end joining (NHEJ) pathway. Previously, it was reported that bone marrow cells and spontaneously transformed fibroblasts from SCID (severe combined immunodeficiency) mice have defects in telomere maintenance. The genetically defective SCID mouse arose spontaneously from its parental strain CB17. One known genomic alteration in SCID mice is a truncation of the extreme carboxyl-terminus of DNA-PKcs, but other as yet unidentified alterations may also exist. We have used a defined system, the DNA-PKcs knockout mouse, to investigate specifically the role DNA-PKcs specifically plays in telomere maintenance. We report that primary mouse embryonic fibroblasts (MEFs) and primary cultured kidney cells from 6-8 month old DNA-PKcs deficient mice accumulate a large number of telomere fusions, yet still retain wildtype telomere length. Thus, the phenotype of this defect separates the two-telomere related phenotypes, capping and length maintenance. DNA-PKcs deficient MEFs also exhibit elevated levels of chromosome fragments and breaks, which correlate with increased telomere fusions. Based on the high levels of telomere fusions observed in DNA-PKcs deficient cells, we conclude that DNA-PKcs plays an important capping role at the mammalian telomere.
Date:
April 10, 2001
Creator:
Gilley, David; Tanaka, Hiromi; Hande, M. Prakash; Kurimasa,Akihiro; Li, Gloria C. & Chen, David J.
Object Type:
Article
System:
The UNT Digital Library
New chicane magnet design for insertion device straights at the Advanced Light Source
A chicane magnet incorporating counter-rotating permanent magnet pairs together with trim coils has been designed for use in the Advanced Light Source (ALS) straights in conjunction with two insertion devices. In particular, this design is being developed for use in the existing beam line (BL) 4 elliptically polarizing undulator (EPU) straight and in the BL11 EPU straight, currently under design and construction. The purpose of the chicane is to provide a fixed angular separation between two successive EPU photon fans, and to correct steering perturbations resulting from EPU polarization state changes. Polarization changes occur on the time scale of one second; associated steering corrections must be accomplished in less than a second. Hysteresis associated with conventional iron core electromagnets prevents fast steering correction to the required precision. This consideration motivated the iron-free design presented here.
Date:
December 10, 2001
Creator:
Marks, Steve; Schlueter, Ross; Anderson, David; Gath, William; Jung, Jin-Young; Robin, David et al.
Object Type:
Article
System:
The UNT Digital Library
High resolution imaging of vadose zone transport using crosswell radar and seismic methods
The summary and conclusions are that overall the radar and seismic results were excellent. At the time of design of the experiments we did not know how well these two methods could penetrate or resolve the moisture content and structure. It appears that the radar could easily go up to 5, even 10 meters between boreholes at 200 Mhz and even father (up to 20 to 40 m) at 50 Mhz. The seismic results indicate that at several hundred hertz propagation of 20 to 30 meters giving high resolution is possible. One of the most important results, however is that together the seismic and radar are complementary in their properties estimation. The radar being primarily sensitive to changes in moisture content, and the seismic being primarily sensitive to porosity. Taken in a time lapse sense the radar can show the moisture content changes to a high resolution, with the seismic showing high resolution lithology. The significant results for each method are: Radar: (1) Delineated geological layers 0.25 to 3.5 meters thick with 0.25 m resolution; (2) Delineated moisture movement and content with 0.25 m resolution; (3) Compared favorably with neutron probe measurements; and (4) Penetration up to 30 m. Radar …
Date:
October 10, 2001
Creator:
Majer, Ernest L.; Williams, Kenneth H.; Peterson, John E. & Daley, Thomas E.
Object Type:
Report
System:
The UNT Digital Library
Historical Aerial Photograph Investigation of Choccolocco Mountain Range Area C at Fort McClellan, Alabama
None
Date:
January 10, 2001
Creator:
King, A. L.
Object Type:
Report
System:
The UNT Digital Library
ATM phosphorylates histone H2AX in response to DNA double-strand breaks
None
Date:
October 10, 2001
Creator:
Burma, Sandeep; Chen, Benjamin P.; Murphy, Michael; Kurimasa, Akihiro & Chen, David J.
Object Type:
Article
System:
The UNT Digital Library
Extensional wave attenuation and velocity in partially saturated sand in the sonic frequency range
Extensional wave attenuation and velocity measurements on a high permeability Monterey sand were performed over a range of gas saturations for imbibition and degassing conditions. These measurements were conducted using extensional wave pulse propagation and resonance over a 1-9 kHz frequency range for a hydrostatic confining pressure of 8.3 MPa. Analysis of the extensional wave data and the corresponding X-ray CT images of the gas saturation show strong attenuation resulting from the presence of the gas (Q{sub E} dropped from 300 for the dry sand to 30 for the partially-saturated sand), with larger attenuation at a given saturation resulting from heterogeneous gas distributions. The extensional wave velocities are in agreement with Gassmann theory for the test with near-homogeneous gas saturation and with a patchy saturation model for the test with heterogeneous gas saturation. These results show that partially-saturated sands under moderate confining pressure can produce strong intrinsic attenuation for extensional waves.
Date:
August 10, 2001
Creator:
Liu, Z.; Rector, J. W.; Nihei, K. T.; Tomutsa, L.; Myer, L. R. & Nakagawa, S.
Object Type:
Article
System:
The UNT Digital Library
A systems engineering primer for every engineer and scientist
The Systems Engineering (SE) staff at LBNL has generated the following artifacts to assist projects with implementing a systems approach: (1) The present document that focuses on the what, why, and when of SE. It also provides a simple case-study to illustrate several SE tasks. (2) A web site with primary emphasis on the project life-cycle and workflow, (http://www-eng.LBNL.gov/Systems/index.html). It includes: SE guidelines and principles; A list of in-house tools; Templates; Case studies with ''how to'' examples; and Links to useful SE material. These sources are living documents to be updated as necessary. The viewpoint adopted in this document is that what LBNL engineers and scientists need is a set of principles and guiding practices for developing R and D systems rather than a ''cookbook''. There are many excellent ''how to'' resources such as the ''INCOSE Systems Engineering Handbook'' to guide those in search of more details. The SE staff is another resource available to consult and support projects. This document specifies SE principles and activities that are applicable to all LBNL projects independent of their specific differences. Each project should tailor the SE implementation to meet its individual needs and culture including project-specific resources, procedures, products, and tools.
Date:
December 10, 2001
Creator:
Edwards, William R.
Object Type:
Report
System:
The UNT Digital Library
Sorting fluorescent nanocrystals with DNA
Semiconductor nanocrystals with narrow and tunable fluorescence are covalently linked to oligonucleotides. These biocompounds retain the properties of both nanocrystals and DNA. Therefore, different sequences of DNA can be coded with nanocrystals and still preserve their ability to hybridize to their complements. We report the case where four different sequences of DNA are linked to four nanocrystal samples having different colors of emission in the range of 530-640 nm. When the DNA-nanocrystal conjugates are mixed together, it is possible to sort each type of nanoparticle using hybridization on a defined micrometer -size surface containing the complementary oligonucleotide. Detection of sorting requires only a single excitation source and an epifluorescence microscope. The possibility of directing fluorescent nanocrystals towards specific biological targets and detecting them, combined with their superior photo-stability compared to organic dyes, opens the way to improved biolabeling experiments, such as gene mapping on a nanometer scale or multicolor microarray analysis.
Date:
December 10, 2001
Creator:
Gerion, Daniele; Parak, Wolfgang J.; Williams, Shara C.; Zanchet, Daniela; Micheel, Christine M. & Alivisatos, A. Paul
Object Type:
Article
System:
The UNT Digital Library
Consumer life-cycle cost impacts of energy-efficiency standards for residential-type central air conditioners and heat pumps
In support of the federal government's efforts to raise the minimum energy-efficiency standards for residential-type central air conditioners and heat pumps, a consumer life-cycle cost (LCC) analysis was conducted to demonstrate the economic impacts on individual consumers from revisions to the standards. LCC is the consumer's cost of purchasing and installing an air conditioner or heat pump and operating the unit over its lifetime. The LCC analysis is conducted on a nationally representative sample of air conditioner and heat pump consumers resulting in a distribution of LCC impacts showing the percentage of consumers that are either benefiting or being burdened by increased standards. Relative to the existing minimum efficiency standard of 10 SEER, the results show that a majority of split system air conditioner and heat pump consumers will either benefit or be insignificantly impacted by increased efficiency standards of up to 13 SEER.
Date:
October 10, 2001
Creator:
Rosenquist, Gregory; Chan, Peter; Lekov, Alex; McMahon, James & Van Buskirk, Robert
Object Type:
Article
System:
The UNT Digital Library
Interactions of proteins in aqueous ammonium-sulfate solutions:Mixtures of lysozyme and ovalbumin
We present a three-dimensional, time-dependent simulation of a laboratory-scale rod-stabilized premixed turbulent V-flame. The simulations are performed using an adaptive time-dependent low Mach number model with detailed chemical kinetics and a mixture model for differential species diffusion. The algorithm is based on a second-order projection formulation and does not require an explicit sub grid model for turbulence or turbulence chemistry interaction. Adaptive mesh refinement is used to dynamically resolve the flame and turbulent structures. Here, we briefly discuss the numerical procedure and present detailed comparisons with experimental measurements showing that the computation is able to accurately capture the basic flame morphology and associated mean velocity field. Finally, we discuss key issues that arise in performing these types of simulations and the implications of these issues for using computation to form a bridge between turbulent flame experiments and basic combustion chemistry.
Date:
November 10, 2001
Creator:
Anderson, Camille O.; Prausnitz, John M. & Blanch, Harvey W.
Object Type:
Report
System:
The UNT Digital Library
A 3-year plan for beam science in the heavy-ion fusion virtual national laboratory
In December 1998, LBNL Director Charles Shank and LLNL Director Bruce Tarter signed a Memorandum of Agreement to create the Heavy-Ion Fusion Virtual National Laboratory (HIF-VNL) with the purpose of improving the efficiency and productivity of heavy ion research through coordination of the two laboratories' efforts under one technical director. In 1999, PPPL Director Robert Goldston signed the VNL MOA for PPPL's heavy-ion fusion group to join the VNL. LBNL and LLNL each contribute about 45% of the $10.6 M/yr trilab VNL effort, and PPPL contributes currently about 10% of the VNL effort. The three labs carry out collaborative experiments, theory and simulations of a variety of intense beam scientific issues described below. The tri-lab HIF VNL program is part of the DOE Office of Fusion Energy Sciences (OFES) fusion program. A short description of the four major tasks areas of HIF-VNL research is given in the next section. The task areas are: High Current Experiment, Final Focus/Chamber Transport, Source/Injector/Low Energy Beam Transport (LEBT), and Theory/Simulation. As a result of the internal review, more detailed reviews of the designs, costs and schedules for some of the tasks have been completed, which will provide more precision in the scheduled completion dates …
Date:
September 10, 2001
Creator:
Logan, B. Grant
Object Type:
Report
System:
The UNT Digital Library
Oligomerization of Chromium (III) and its impact on the oxidation of Chromium (III) by Hydrogen Peroxide in alkaline solutions
None
Date:
October 10, 2001
Creator:
Rao, Linfeng; Zhang, Zhicheng; Friese, Judah I.; Ritherdon, B.; Clark, Sue B.; Hess, Nancy J. et al.
Object Type:
Article
System:
The UNT Digital Library
Texas Register, Volume 26, Number 32, Pages 5893-6060, August 10, 2001
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
August 10, 2001
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
[News Clip: Boeing PKG]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
May 10, 2001, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: T.D. Jakes/Time PKG]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
September 10, 2001, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Boeing to Chicago PKG]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
May 10, 2001, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Boeing]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
May 10, 2001, 4:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
El Tratado De Guadalupe Hidalgo: Definicion y lista de las concesiones de tierras comunitarias en Nuevo Mexico
A letter report issued by the General Accounting Office with an abstract that begins "From the end of the seventeenth century to the mid-nineteenth century, Spain made land grants to individuals, towns, and groups to promote development in what is now the American Southwest. Under the Treaty of Guadalupe Hidalgo, which ended the Mexican-American War, the United States agreed to recognize ownership of property of every kind in the ceded areas. Many persons, including grantee heirs, scholars, and legal experts, still claim that the United States did not protect the property of Mexican-Americans and their descendants, particularly the common lands of community grants. Land grant documents contain no direct reference to "community land grants" nor do Spanish and Mexican laws define or use this term. GAO did find, however, that some grants refer to lands set aside for general communal use or for specific purposes, including hunting, pasture, wood gathering, or watering. Scholars, the land grant literature, and popular terminology commonly use the phrase "community land grants" to denote land grants that set aside common lands for the use of the entire community. GAO adopted this broad definition in determining which Spanish and Mexican land grants can be identified as …
Date:
September 10, 2001
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Treaty of Guadalupe Hidalgo: Definition and List of Community Land Grants in New Mexico
A letter report issued by the General Accounting Office with an abstract that begins "Until the mid-nineteenth century, Spain made land grants to towns and individuals to promote development in the frontier lands that now constitute the American Southwest. Under the Treaty of Guadalupe Hidalgo, which ended the Mexican-American War, the United States agreed to recognize ownership of property of every kind in the ceded areas. Many people, including grantee heirs, scholars, and legal experts, still claim that the United States did not protect the property of Mexican-Americans and their descendants, particularly the common lands of community grants. Land grant documents contain no direct reference to "community land grants," nor do Spanish and Mexican laws define or use this term. GAO did find, however, that some grants refer to lands set aside for general communal use or for specific purposes, including hunting, pasture, wood gathering, or watering. Scholars, the land grant literature, and popular terminology commonly use the phrase "community land grants" to denote land grants that set aside common lands for the use of the entire community. GAO adopted this broad definition in determining which Spanish and Mexican land grants can be identified as community land grants. GAO identified …
Date:
September 10, 2001
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Design and Development of Gas-Liquid Cylindrical Cyclone Compact Separators for Three-Phase Flow
The objective of this five-year project (October 1997--September 2002) was to expand the current research activities of Tulsa University Separation Technology Projects (TUSTP) to multiphase oil/water/gas separation. This project was executed in two phases. Phase I (1997--2000) focused on the investigations of the complex multiphase hydrodynamic flow behavior in a three-phase Gas-Liquid Cylindrical Cyclone (GLCC) Separator. The activities of this phase included the development of a mechanistic model, a computational fluid dynamics (CFD) simulator, and detailed experimentation on the three-phase GLCC. The experimental and CFD simulation results will be suitably integrated with the mechanistic model. In Phase II (2000--2002), the developed GLCC separator will be tested under high pressure and real crude conditions. This is crucial for validating the GLCC design for field application and facilitating easy and rapid technology deployment. Design criteria for industrial applications will be developed based on these results and will be incorporated into the mechanistic model by TUSTP.
Date:
January 10, 2001
Creator:
Mohan, Ram S. & Shoham, Ovadia
Object Type:
Report
System:
The UNT Digital Library