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UNT Libraries Government Documents Department
193
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191
National Museum of the Pacific War/Admiral Nimitz Foundation
71
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32
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12
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12
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8
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7
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Jim Argo Collection
141
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108
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71
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71
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58
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57
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33
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24
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Degree Department
Country
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Year
Month
Day
CHARACTERIZATION OF A RIGID BARRIER FILTER SYSTEM
A mathematical model is formulated to describe the dynamics of a rigid barrier filter system. Complete with filtration, regeneration and particle re-deposition, this model provides sizing information for new filter systems and diagnostic information for operating filter systems. To turn this model into a practical and smart filter system predictive model, monitoring devices for variables such as real-time particle concentration and size distribution are currently under laboratory development. The program goal is to introduce a smart filter system to supervise its operation and to assure its system reliability. Primarily, a smart filter system will update operating information, sound up malfunction alarms, and provide self-activated measures such as adjusting the cleaning frequency, intensity and back-pulse duration.
Date:
November 6, 2001
Creator:
Chiang, Ta-Kuan
Object Type:
Article
System:
The UNT Digital Library
LES Software for the Design of Low Emission Combustion Systems for Vision 21 Plants: First Year Program Review
In this project, an advanced computational software tool will be developed for the design of low emission combustion systems required for Vision 21 clean energy plants. This computational tool will utilize Large Eddy Simulation (LES) methods to predict the highly transient nature of turbulent combustion. The time-accurate software will capture large scale transient motion, while the small scale motion will be modeled using advanced subgrid turbulence and chemistry closures. This three-year project is composed of: Year 1--model development/implementation, Year 2--software alpha validation, and Year 3--technology transfer of software to industry including beta testing. In this first year of the project, subgrid models for turbulence and combustion are being developed through university research (Suresh Menon-Georgia Tech and J.-Y. Chen- UC Berkeley) and implemented into a leading combustion CFD code, CFD-ACE+. The commercially available CFDACE+ software utilizes unstructured , parallel architecture and 2nd-order spatial and temporal numerics. To date, the localized dynamic turbulence model and reduced chemistry models (up to 19 species) for natural gas, propane, hydrogen, syngas, and methanol have been incorporated. The Linear Eddy Model (LEM) for subgrid combustion-turbulence interaction has been developed and implementation into CFD-ACE+ has started. Ways of reducing run-time for complex stiff reactions is being studied, …
Date:
November 6, 2001
Creator:
Cannon, Steven M.; Adumitroaie, Virgil; McDaniel, Keith S. & Smith, Clifford E.
Object Type:
Article
System:
The UNT Digital Library
Oxide Dispersion-Strengthened Heat Exchanger Tubing
Oxide dispersion strengthened (ODS) alloys (e.g. the INCOLOY{reg_sign} MA956 alloy) are known for their excellent high temperature properties and are prime candidate materials for the construction of very high temperature heat exchangers that will be used in Vision 21 power plants. The main limitation of these materials is their poor weldability. Commercially available ODS tubing also tends to exhibit relatively poor circumferential creep strength due to current processing practices resulting in a fine grain size in the transverse direction. Thus far, these two characteristics of the ODS tubing have restricted its use to mostly non-pressure containing applications. The objectives of this program are to develop: (a) an MA956 tube with sufficient circumferential creep strength for long term use as heat exchanger tubing for very high temperatures; (b) a welding technique(s) for producing adequate joints between an MA956 tube and an MA956 tube, and an MA956 tube and an INCONEL 601 tube; (c) the bending strain limits, below which recrystallization will not occur in a MA956 tube during normal operation; and (d) the high temperature corrosion limits for the MA956 alloy with respect to working-fluid side and fireside environments. Also, this program seeks to generate data for use by heat exchanger …
Date:
November 6, 2001
Creator:
Harper, Mark A.
Object Type:
Article
System:
The UNT Digital Library
A Computational Workbench Environment For Virtual Power Plant Simulation
In this paper we describe our progress toward creating a computational workbench for performing virtual simulations of Vision 21 power plants. The workbench provides a framework for incorporating a full complement of models, ranging from simple heat/mass balance reactor models that run in minutes to detailed models that can require several hours to execute. The workbench is being developed using the SCIRun software system. To leverage a broad range of visualization tools the OpenDX visualization package has been interfaced to the workbench. In Year One our efforts have focused on developing a prototype workbench for a conventional pulverized coal fired power plant. The prototype workbench uses a CFD model for the radiant furnace box and reactor models for downstream equipment. In Year Two and Year Three, the focus of the project will be on creating models for gasifier based systems and implementing these models into an improved workbench. In this paper we describe our work effort for Year One and outline our plans for future work. We discuss the models included in the prototype workbench and the software design issues that have been addressed to incorporate such a diverse range of models into a single software environment. In addition, we …
Date:
November 6, 2001
Creator:
Bockelie, Michael J.; Swensen, David A.; Denison, Martin K. & Sarofim, Adel F.
Object Type:
Article
System:
The UNT Digital Library
Fuel Flexibility in Gasification
In order to increase efficiencies of carbonizers, operation at high pressures is needed. In addition, waste biomass fuels of opportunity can be used to offset fossil fuel use. The National Energy Technology Laboratory (NETL) Fluidized Bed Gasifier/Combustor (FBG/C) was used to gasify coal and mixtures of coal and biomass (sawdust) at 425 psig. The purpose of the testing program was to generate steady state operating data for modeling efforts of carbonizers. A test program was completed with a matrix of parameters varied one at a time in order to avoid second order interactions. Variables were: coal feed rate, pressure, and varying mixtures of sawdust and coal types. Coal types were Montana Rosebud subbituminous and Pittsburgh No. 8 bituminous. The sawdust was sanding waste from a furniture manufacturer in upstate New York. Coal was sieved from -14 to +60 mesh and sawdust was sieved to -14 mesh. The FBG/C operates at a nominal 425 psig, but pressures can be lowered. For the tests reported it was operated as a jetting, fluidized bed, ash-agglomerating gasifier. Preheated air and steam are injected into the center of the bottom along with the solid feed that is conveyed with cool air. Fairly stable reactor internal …
Date:
November 6, 2001
Creator:
McLendon, T. Robert; Pineault, Richard L.; Richardson, Steven W.; Rockey, John M.; Beer, Stephen K. (U.S. DOE National Energy Technology Laboratory); Lui, Alain P. et al.
Object Type:
Article
System:
The UNT Digital Library
Overview of the NETL Onsite Fuel Cell R&D Program
Onsite fuel cell R&D at the National Energy Technology Laboratory (NETL) has been ongoing since the late 1990's. The objective of the onsite program is to support development efforts of the fuel cell technology-related product lines and conduct fundamental research of advanced fuel cell technology. Of special focus is NETL's new 10-yr, multimillion dollar development program call the Solid State Energy Conversion Alliance (SECA). This program is aimed at developing low-cost mass manufactured solid oxide fuel cell technology for a wide variety of applications. In addition to SECA, there are a variety of other products/programs at NETL that can be supported by the onsite R&D group. Vision 21 is one such program and is the U. S. Department of Energy's initiative to deploy high efficiency, ultra-clean co-production coal conversion power plants in the twenty-first century. These plants will consist of power and coproduction modules, which are integrated to meet specific power and chemical markets. In response to these program initiatives, NETL's onsite R&D group is developing significant capability and focusing current activity on the following areas: (1) High-Temperature Fuel Cell Test & Characterization; (2) Integrated Fuel Processing; (3) Fuel Cell Component and Systems Modeling; and (4) Sensors, Controls, and Instrumentation. …
Date:
November 6, 2001
Creator:
Berry, David A. & Gemmen, Randall S.
Object Type:
Article
System:
The UNT Digital Library
The history of LOCA embrittlement criteria.
None
Date:
December 6, 2001
Creator:
Hache, G. & Chung, H.M.
Object Type:
Article
System:
The UNT Digital Library
A new lizard species in the genus Xantusia from Arizona
None
Date:
September 6, 2001
Creator:
Papenfuss, Theodore J.; Macey, J. Robert & Schulte II, James A.
Object Type:
Article
System:
The UNT Digital Library
A control-theoretic formulation of the bunch train cavity interaction.
The bunch train cavity interaction is an accelerator physics problem, for which a system-theoretic model is lacking. Modal analysis has been used to characterize the system dynamics, exploiting the system's symmetry. Correspondingly, control design has been done using classical frequency-domain-based control. Several shortcomings of these methods are highlighted, all of which are remedied by a new time-domain, system-theoretic model presented herein. The new formulation is a periodic, discrete-time system, amenable to state-space control-design methods.
Date:
March 6, 2001
Creator:
Schwartz, C.; Haddad, H. & Nassiri, A.
Object Type:
Article
System:
The UNT Digital Library
FURNACE INJECTION OF ALKALINE SORBENTS FOR SULFURIC ACID CONTROL
This document summarizes progress on Cooperative Agreement DE-FC26-99FT40718, Furnace Injection of Alkaline Sorbents for Sulfuric Acid Control, during the time period April 1, 2001 through September 30, 2001. The objective of this project is to demonstrate the use of alkaline reagents injected into the furnace of coal-fired boilers as a means of controlling sulfuric acid emissions. The coincident removal of hydrochloric acid and hydrofluoric acid is also being determined, as is the removal of arsenic, a known poison for NO{sub x} selective catalytic reduction (SCR) catalysts. EPRI, the Tennessee Valley Authority (TVA), FirstEnergy Corporation, and the Dravo Lime Company are project co-funders. URS Corporation is the prime contractor. During the current period, American Electric Power (AEP) joined the project as an additional co-funder and as a provider of a host site for testing. This is the fourth reporting period for the subject Cooperative Agreement. During this period, two long-term sorbent injection tests were conducted, one on Unit 3 at FirstEnergy's Bruce Mansfield Plant (BMP) and one on Unit 1 at AEP's Gavin Station. These tests determined the effectiveness of injecting alkaline slurries into the upper furnace of the boiler as a means of controlling sulfuric acid emissions from these units. …
Date:
November 6, 2001
Creator:
Blythe, Gary M.
Object Type:
Report
System:
The UNT Digital Library
Final report: SIAM [Society for Industrial and Applied Mathematics] Conference on Linear Algebra and its Applications, October 23-26, 2000
The Society for Industrial and Applied Mathematics (SIAM) and the SIAM Activity Group in Linear Algebra in conjunction with the International Linear Algebra Society (ILAS) held the SIAM Conference on Linear Algebra and its applications on October 23-26, 2000 at the McKimmon Conference Center on the campus of North Carolina State University in Raleigh, North Carolina. The goals of this conference were to highlight the central role of linear algebra in many problems of mathematics and the applied sciences, including engineering problems in systems and control, signal processing and coding, economic and business problems, and problems from biology and geophysics. Particular consideration in this conference was given to applications in image processing, information retrieval and management (such as the performance of search engines on the Internet), aircraft manufacturing and design, industrial optimization problems, and assessing the economic cost of linear algebra in industry. With the development of high performance computers and new parallel architectures, computational linear algebra is in a state of rapid development. There are grand challenges requiring the development of efficient methods that solve truly large-scale problems by exploiting the ever-increasing computational power. One of the primary goals of this conference was to bring researchers and practitioners in …
Date:
April 6, 2001
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Towards a perturbative theory of nuclear forces
The authors show that an expansion of nuclear forces about the chiral limit is formally consistent and is equivalent to KSW power counting in the {sup 1}S{sub 0} channel and Weinberg power counting in the {sup 3}S{sub 1}--{sup 3}D{sub 1} coupled channels. Numerical evidence suggests that this expansion converges. The feasibility of making contact between nuclear physics and lattice-QCD simulations is discussed.
Date:
January 6, 2001
Creator:
Beane, S. R.; Bedaque, P. F.; Savage, M. J. & van Kolck, U.
Object Type:
Report
System:
The UNT Digital Library
The Colour Glass Condensate: An Introduction
In these lectures, the authors develop the theory of the Colour Glass Condensate. This is the matter made of gluons in the high density environment characteristic of deep inelastic scattering or hadron-hadron collisions at very high energy. The lectures are self contained and comprehensive. They start with a phenomenological introduction, develop the theory of classical gluon fields appropriate for the Colour Glass, and end with a derivation and discussion of the renormalization group equations which determine this effective theory.
Date:
August 6, 2001
Creator:
Iancu, E.; Leonidov, A. & McLerran, L.
Object Type:
Article
System:
The UNT Digital Library
Cell surface glycoconjugates of Rhizobium and symbiosis
This report describes key findings on the characterization of the structure and function of Rhizobium polysaccharides and how they relate to the symbiosis between these bacteria and legume plants.
Date:
May 6, 2001
Creator:
Hollingsworth, Rawle
Object Type:
Report
System:
The UNT Digital Library
Biosphere Modeling and Analyses in Support of Total System Performance Assessment
The Nuclear Waste Policy Act of 1982 established the obligations of and the relationship between the U.S. Environmental Protection Agency (EPA), the U.S. Nuclear Regulatory Commission (NRC), and the U.S. Department of Energy (DOE) for the management and disposal of high-level radioactive wastes. In 1985, the EPA promulgated regulations that included a definition of performance assessment that did not consider potential dose to a member of the general public. This definition would influence the scope of activities conducted by DOE in support of the total system performance assessment program until 1995. The release of a National Academy of Sciences (NAS) report on the technical basis for a Yucca Mountain-specific standard provided the impetus for the DOE to initiate activities that would consider the attributes of the biosphere, i.e. that portion of the earth where living things, including man, exist and interact with the environment around them. The evolution of NRC and EPA Yucca Mountain-specific regulations, originally proposed in 1999, was critical to the development and integration of biosphere modeling and analyses into the total system performance assessment program. These proposed regulations initially differed in the conceptual representation of the receptor of interest to be considered in assessing performance. The publication …
Date:
December 6, 2001
Creator:
Tappen, Jeff; Wasiolek, M. A.; Wu, D. W. & Schmitt, J. F.
Object Type:
Report
System:
The UNT Digital Library
Far-infrared absorption in Sb-doped Ge epilayers near the metal-insulator transition
None
Date:
December 6, 2001
Creator:
Bandaru, Jordana; Beeman, Jeffrey W. & Haller, Eugene E.
Object Type:
Article
System:
The UNT Digital Library
ISO 14001 EMS VALUE PROPOSITION.
The objective of this report is to identify business opportunities and value for Battelle Organizations to undertake IS0 14001 Environmental Management System Implementation and registration to the international standard as a corporate strategic initiative.
Date:
November 6, 2001
Creator:
BRIGGS,S.L.K.
Object Type:
Article
System:
The UNT Digital Library
Two Studies of Colloidal Interactions: Electric Polarizability and Protein Crystallization. Final Report
(I)Electric polarizability. During this grant period, the focus was on five topics concerning electric field effects on colloids. The first topic focuses on electric interactions between charged colloids in the absence of external fields, and the remaining four deal with colloids in the presence of external fields. The topics are (1) calculation of the effect of confinement on the pair-potential between like-charged colloids, (2) experimental determination of the interparticle potential under the conditions of dielectric polarization, (3) measurement of the evolution of structure of ER fluids, (4) synthesis of novel colloids designed for ER studies, and (5) computer modeling of polarization of surface charge. (II) Protein crystallization. Studies of the phase behavior of mixtures of proteins and polymers were initiated. The motivation was to test recent theories that suggested that optimal conditions for protein crystallization could be obtained using such mixtures. Combined light scattering measurements of the virial coefficients and determination of the phase diagram of protein/polymer mixtures revealed that the theoretical picture needs to be substantially modified.
Date:
August 6, 2001
Creator:
Fraden, Seth & Hu, Yue
Object Type:
Report
System:
The UNT Digital Library
Operational Guideline: Tenax TA{sup (R)} Collection and In-Injection Port Thermal Desorption Analysis of Trace Levels of Organic Explosive Vapors
This document contains operational guidelines for an organic explosives vapor sampling and analysis method developed in the Chemical and Analytical Sciences Division at Oak Ridge National Laboratory under funding provided by the Defense Advanced Research Projects Agency. This document is written in a format resembling that of a standard operating procedure (SOP); however, it is intended only as an operational guideline for those wishing to implement the method.
Date:
September 6, 2001
Creator:
Sigman, M.E.
Object Type:
Report
System:
The UNT Digital Library
Support Facility for a Mercury Target Neutrino Factory
A conceptual design for a neutrino-producing facility is presented, including the mercury-jet target system, beam absorber, and facility for the target/capture region. The mercury system is a closed loop that includes a containment structure in the high-magnetic field region, a mercury pool beam absorber, conventional equipment such as magnetic-coupled pumps, valves, a heat exchanger, and a special nozzle insert. The superconducting solenoids in the target region are protected from nuclear heating and radiation damage with water-cooled tungsten-carbide shielding; the decay channel solenoids are protected with water-cooled steel shielding. The target region and decay channel have high-neutron fluxes resulting in components that are highly activated. Therefore, the facility configuration is based on remotely maintaining the target system and the magnets, as well as providing sufficient shielding for personnel. Summaries of cost estimates for the target system, magnet shielding, maintenance equipment, and the facility are also presented.
Date:
December 6, 2001
Creator:
Spampinato, P. T.; Chesser, J. B.; Conner, D. L.; Gabriel, T. A.; Gallmeier, F. X.; Haines, J. R. et al.
Object Type:
Report
System:
The UNT Digital Library
Texas Register, Volume 26, Number 27, Pages 4919-5154, July 6, 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:
July 6, 2001
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Register, Volume 26, Number 14, Pages 2575-2788, April 6, 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:
April 6, 2001
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
[Cotton Gin]
Photograph of the Cotton Gin in Jonesville, Texas.
Date:
May 6, 2001
Creator:
Texas Historical Commission
Object Type:
Photograph
System:
The Portal to Texas History
[Cotton Gin]
Photograph of the Cotton Gin in Jonesville, Texas.
Date:
May 6, 2001
Creator:
Texas Historical Commission
Object Type:
Photograph
System:
The Portal to Texas History