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Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 92, No. 43, Ed. 1 Sunday, December 31, 2006
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 31, 2006
Creator:
Mattox, Jami
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Selective NOx Recirculation for Stationary Lean-Burn Natural Gas Engines
Nitric oxide (NO) and nitrogen dioxide (NO2) generated by internal combustion (IC) engines are implicated in adverse environmental and health effects. Even though lean-burn natural gas engines have traditionally emitted lower oxides of nitrogen (NOx) emissions compared to their diesel counterparts, natural gas engines are being further challenged to reduce NOx emissions to 0.1 g/bhp-hr. The Selective NOx Recirculation (SNR) approach for NOx reduction involves cooling the engine exhaust gas and then adsorbing the NOx from the exhaust stream, followed by the periodic desorption of NOx. By sending the desorbed NOx back into the intake and through the engine, a percentage of the NOx can be decomposed during the combustion process. SNR technology has the support of the Department of Energy (DOE), under the Advanced Reciprocating Engine Systems (ARES) program to reduce NOx emissions to under 0.1 g/bhp-hr from stationary natural gas engines by 2010. The NO decomposition phenomenon was studied using two Cummins L10G natural gas fueled spark-ignited (SI) engines in three experimental campaigns. It was observed that the air/fuel ratio ({lambda}), injected NO quantity, added exhaust gas recirculation (EGR) percentage, and engine operating points affected NOx decomposition rates within the engine. Chemical kinetic model predictions using the software …
Date:
December 31, 2006
Creator:
Clark, Nigel N.
Object Type:
Report
System:
The UNT Digital Library
Seminole Sentinel (Seminole, Tex.), Vol. 98, No. 24, Ed. 1 Sunday, December 31, 2006
Semiweekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.
Date:
December 31, 2006
Creator:
Wright, Dustin
Object Type:
Newspaper
System:
The Portal to Texas History
Separation of Fischer-Tropsch Wax Products from Ultrafine Iron Catalyst Particles
A fundamental filtration study was started to investigate the separation of Fischer-Tropsch Synthesis (FTS) liquids from iron-based catalyst particles. Slurry-phase FTS in slurry bubble column reactor systems is the preferred mode of operation since the reaction is highly exothermic. Consequently, heavy wax products in one approach may be separated from catalyst particles before being removed from the reactor system. Achieving an efficient wax product separation from iron-based catalysts is one of the most challenging technical problems associated with slurry-phase iron-based FTS and is a key factor for optimizing operating costs. The separation problem is further compounded by attrition of iron catalyst particles and the formation of ultra-fine particles.
Date:
December 31, 2006
Creator:
Sarkar, Amitava; Neathery, James K. & Davis, Burtron H.
Object Type:
Report
System:
The UNT Digital Library
Solid State Energy Conversion Alliance Delphi SOFC
The following report details the results under the DOE SECA program for the period July 2006 through December 2006. Developments pertain to the development of a 3 to 5 kW Solid Oxide Fuel Cell power system for a range of fuels and applications. This report details technical results of the work performed under the following tasks for the SOFC Power System: Task 1 SOFC System Development; Task 2 Solid Oxide Fuel Cell Stack Developments; Task 3 Reformer Developments; Task 4 Development of Balance of Plant Components; Task 5 Project Management; and Task 6 System Modeling & Cell Evaluation for High Efficiency Coal-Based Solid Oxide Fuel Cell Gas Turbine Hybrid System.
Date:
December 31, 2006
Creator:
Shaffer, Steven; Blake, Gary; Kelly, Sean; Mukerjee, Subhasish; Haltiner, Karl; Chick, Larry et al.
Object Type:
Report
System:
The UNT Digital Library
Sorbent Injection for Small ESP Mercury Control in Low Sulfur Eastern Bituminous Coal Flue Gas
This project Final Report is submitted to the U.S. Department of Energy (DOE) as part of Cooperative Agreement DE-FC26-03NT41987, 'Sorbent Injection for Small ESP Mercury Control in Low Sulfur Eastern Bituminous Coal Flue Gas.' Sorbent injection technology is targeted as the primary mercury control process on plants burning low/medium sulfur bituminous coals equipped with ESP and ESP/FGD systems. About 70% of the ESPs used in the utility industry have SCAs less than 300 ft2/1000 acfm. Prior to this test program, previous sorbent injection tests had focused on large-SCA ESPs. This DOE-NETL program was designed to generate data to evaluate the performance and economic feasibility of sorbent injection for mercury control at power plants that fire bituminous coal and are configured with small-sized electrostatic precipitators and/or an ESP-flue gas desulfurization (FGD) configuration. EPRI and Southern Company were co-funders for the test program. Southern Company and Reliant Energy provided host sites for testing and technical input to the project. URS Group was the prime contractor to NETL. ADA-ES and Apogee Scientific Inc. were sub-contractors to URS and was responsible for all aspects of the sorbent injection systems design, installation and operation at the different host sites. Full-scale sorbent injection for mercury control …
Date:
December 31, 2006
Creator:
Richardson, Carl; Dombrowski, Katherine & Orr, Douglas
Object Type:
Report
System:
The UNT Digital Library
“Structural Transformations in Ceramics: Perovskite-like Oxides and Group III, IV, and V Nitrides”
1 Overview of Results and their Significance Ceramic perovskite-like oxides with the general formula (A. A0. ...)(B. B0. ...)O3and titanium-based oxides are of great technological interest because of their large piezoelectric and dielectric response characteristics.[1] In doped and nanoengineered forms, titantium dioxide finds increasing application as an organic and hydrolytic photocatalyst. The binary main-group-metal nitride compounds have undergone recent advancements of in-situ heating technology in diamond anvil cells leading to a burst of experimental and theoretical interest. In our DOE proposal, we discussed our unique theoretical approach which applies ab initio electronic calculations in conjunction with systematic group-theoretical analysis of lattice distortions to study two representative phase transitions in ceramic materials: (1) displacive phase transitions in primarily titanium-based perovskite-like oxide ceramics, and (2) reconstructive phase transitions in main-group nitride ceramics. A sub area which we have explored in depth is doped titanium dioxide electrical/optical properties.
Date:
December 31, 2006
Creator:
James P. Lewis (PI, former Co-PI), Dorian M. Hatch (Co-PI, former PI), and Harold T. Stokes (Co-PI)
Object Type:
Report
System:
The UNT Digital Library
Subtask 1.17 - Measurement of Hydrocarbon Evolution from Coal and Petroleum Reservoirs Under Carbon Dioxide Floods
The project developed, built, and tested three apparatuses for studying different interactions of carbon dioxide with geologic materials. In Year 1, an online instrument was constructed by coupling a high-pressure carbon dioxide extraction system with a flame ionization detector that can yield a real-time profile and quantitative measurements of hydrocarbons removed from materials such as coal and petroleum reservoir rock. In Years 2 and 3, one instrument was built to measure the excess sorption of carbon dioxide in geologic materials such as coal and showed that measurable uptake of carbon dioxide into the coal matrix is rapid. The final apparatus was built to expose geologic materials to carbon dioxide for long periods of time (weeks to months) under the range of pressures and temperatures relevant to carbon dioxide sequestration. The apparatus allows as many as twenty gram-sized samples of geologic materials to be exposed simultaneously and can also include exposures with geologic brines. The system was used to demonstrate complete conversion of magnesium silicate to magnesium carbonate in less than 4 weeks when exposed to clean water or brine, compared to no measurable conversion of dry magnesium carbonate.
Date:
December 31, 2006
Creator:
Hawthorne, Steven B.
Object Type:
Report
System:
The UNT Digital Library
Surface Area, Volume, Mass, and Density Distributions for Sized Biomass Particles
None
Date:
December 31, 2006
Creator:
Sampath, Ramanathan
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 86, No. 34, Ed. 1 Saturday, December 30, 2006
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 30, 2006
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
Perry Daily Journal (Perry, Okla.), Vol. 114, No. 253, Ed. 1 Saturday, December 30, 2006
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 30, 2006
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Terminator Detection by Support Vector Machine Utilizing aStochastic Context-Free Grammar
A 2-stage detector was designed to find rho-independent transcription terminators in the Escherichia coli genome. The detector includes a Stochastic Context Free Grammar (SCFG) component and a Support Vector Machine (SVM) component. To find terminators, the SCFG searches the intergenic regions of nucleotide sequence for local matches to a terminator grammar that was designed and trained utilizing examples of known terminators. The grammar selects sequences that are the best candidates for terminators and assigns them a prefix, stem-loop, suffix structure using the Cocke-Younger-Kasaami (CYK) algorithm, modified to incorporate energy affects of base pairing. The parameters from this inferred structure are passed to the SVM classifier, which distinguishes terminators from non-terminators that score high according to the terminator grammar. The SVM was trained with negative examples drawn from intergenic sequences that include both featureless and RNA gene regions (which were assigned prefix, stem-loop, suffix structure by the SCFG), so that it successfully distinguishes terminators from either of these. The classifier was found to be 96.4% successful during testing.
Date:
December 30, 2006
Creator:
Francis-Lyon, Patricia; Cristianini, Nello & Holbrook, Stephen
Object Type:
Article
System:
The UNT Digital Library
3D culture models of normal and malignant breast epithelial cells
This report describes a robust and generalized method for the clustering of various human breast cell lines in 3D and describes the preparation of cellular extracts from these cultures for molecular analysis.
Date:
December 29, 2006
Creator:
Lee, Genee Y.; Kenny, Paraic A.; Lee, Eva H. & Bissell, Mina J.
Object Type:
Article
System:
The UNT Digital Library
[After a Fashion, December 29, 2006]
Article about various events that took place in Austin, Texas throughout 2006.
Date:
December 29, 2006
Creator:
Moser, Stephen MacMillan
Object Type:
Article
System:
The UNT Digital Library
The Altus Times (Altus, Okla.), Vol. 108, No. 234, Ed. 1 Friday, December 29, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 29, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Aluminum Bronze Alloys to Improve the System Life of Basic Oxygen and Electric Arc Furnace Hoods, Roofs and Side Vents.
Energy Industries of Ohio was the lead organization for a consortium that examined the current situation involving the service life of electric arc and basic oxygen furnace hoods, roofs and side vents. Republic Engineered Products (REP), one of the project partners, installed a full-scale Al-Bronze “skirt” in their BOF at their Lorain OH facility, believed to be the first such installation of this alloy in this service. In 24 months of operation, the Al-Bronze skirt has processed a total of 4,563 heats, requiring only 2 shutdowns for maintenance, both related to physical damage to the skirt from operational mishaps. Yearly energy savings related to the REP facility are projected to be ~ 10 billion Btu's with significant additional environmental and productivity benefits. In recognition of the excellent results, this project was selected as the winner of the Ohio’s 2006 Governor’s Award for Excellence in Energy, the state’s award for outstanding achievements in energy efficiency.
Date:
December 29, 2006
Creator:
Jr., Lawrence C. Boyd & Sikka, Dr. Vinod K.
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 86, No. 33, Ed. 1 Friday, December 29, 2006
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 29, 2006
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
A Bloch-Torrey Equation for Diffusion in a Deforming Media
Diffusion Tensor Magnetic Resonance Imaging (DTMRI)technique enables the measurement of diffusion parameters and therefore,informs on the structure of the biological tissue. This technique isapplied with success to the static organs such as brain. However, thediffusion measurement on the dynamically deformable organs such as thein-vivo heart is a complex problem that has however a great potential inthe measurement of cardiac health. In order to understand the behavior ofthe Magnetic Resonance (MR)signal in a deforming media, the Bloch-Torreyequation that leads the MR behavior is expressed in general curvilinearcoordinates. These coordinates enable to follow the heart geometry anddeformations through time. The equation is finally discretized andpresented in a numerical formulation using implicit methods, in order toget a stable scheme that can be applied to any smooth deformations.Diffusion process enables the link between the macroscopic behavior ofmolecules and themicroscopic structure in which they evolve. Themeasurement of diffusion in biological tissues is therefore of majorimportance in understanding the complex underlying structure that cannotbe studied directly. The Diffusion Tensor Magnetic ResonanceImaging(DTMRI) technique enables the measurement of diffusion parametersand therefore provides information on the structure of the biologicaltissue. This technique has been applied with success to static organssuch as the brain. However, diffusion measurement of dynamicallydeformable organs …
Date:
December 29, 2006
Creator:
Rohmer, Damien & Gullberg, Grant T.
Object Type:
Report
System:
The UNT Digital Library
Boerne Star & Recorder (Boerne, Tex.), Vol. 100, No. 104, Ed. 1 Friday, December 29, 2006
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
December 29, 2006
Creator:
Cartwright, Brian
Object Type:
Newspaper
System:
The Portal to Texas History
Calculated concrete target damage by multiple rod impact and penetration
The effect of enhanced crater formation has been demonstrated experimentally when multiple and delayed shaped charge jets impact and penetrate concrete. The concept for enhancement utilizes a single follow-on jet at the centerline of holes produced by multiple precursor jets penetrating the surrounding the region. Calculations of the 3D crater enhancement phenomena have been conducted with multiple rods to simulate the steady state portion of the multiple jet penetration process. It is expected that this analysis methodology will be beneficial for optimization of the multiple jet crater enhancement application. We present calculated results using ALE3D where the model uses the standard Gruneisen equation of state combined with a rate dependent strength model including material damage parameters. This study focuses on the concrete material damage model as a representation of the portion of the target that would eventually be ejected creating a large bore-hole. The calculations are compared with the experimental evidence and limitations of the modeling approach are discussed.
Date:
December 29, 2006
Creator:
Pincosy, P A & Murphy, M J
Object Type:
Article
System:
The UNT Digital Library
Code Verification Results of an LLNL ASC Code on Some Tri-Lab Verification Test Suite Problems
As scientific codes become more complex and involve larger numbers of developers and algorithms, chances for algorithmic implementation mistakes increase. In this environment, code verification becomes essential to building confidence in the code implementation. This paper will present first results of a new code verification effort within LLNL's B Division. In particular, we will show results of code verification of the LLNL ASC ARES code on the test problems: Su Olson non-equilibrium radiation diffusion, Sod shock tube, Sedov point blast modeled with shock hydrodynamics, and Noh implosion.
Date:
December 29, 2006
Creator:
Anderson, S R; Bihari, B L; Salari, K & Woodward, C S
Object Type:
Article
System:
The UNT Digital Library
[Concert Poster: Two Nights With Fair to Midland]
Poster/flyer advertising a concert by Fair to Midland with The Feds, Upside, Monte Cassino, The Timeline Post, The House Harkonnen and Opus Dai on December 29-30, 2006, at the Curtain Club.
Date:
2006-12-29/2006-12-30
Creator:
unknown
Object Type:
Poster
System:
The UNT Digital Library
Dallas Voice (Dallas, Tex.), Vol. 23, No. 33, Ed. 1 Friday, December 29, 2006
Weekly newspaper from Dallas, Texas that includes local, state, and national news and advertising of interest to the Lesbian, Gay, Bisexual, and Transgender (LGBT) community.
Date:
December 29, 2006
Creator:
Nash, Tammye
Object Type:
Newspaper
System:
The UNT Digital Library
Design and Evaluation of a Virtual Quadrant Receiver for 4-ary Pulse Position Modulation/Optical Code Division Multiple Access (4-ary PPM/O-CDMA)
M-ary pulse position modulation (M-ary PPM) is an alternative to on-off-keying (OOK) that transmits multiple bits as a single symbol occupying a frame of M slots. PPM does not require thresholding as in OOK signaling, instead performing a comparison test among all slots in a frame to make the slot decision. Combining PPM with optical code division multiple access (PPM/O-CDMA) adds the benefit of supporting multiple concurrent, asynchronous bursty PPM users. While the advantages of PPM/O-CDMA are well known, implementing a receiver that performs comparison test can be difficult. This paper describes the design of a novel array receiver for M-ary PPM/O-CDMA (M = 4) where the received signal is mapped onto an xy-plane whose quadrants define the PPM slot decision by means of an associated control law. The receiver does not require buffering or nonlinear operations. In this paper we describe a planar lightwave circuit (PLCs) implementation of the receiver. We give detailed numerical simulations that test the concept and investigate the effects of multi-access interference (MAI) and optical beat interference (OBI) on the slot decisions. These simulations provide guidelines for subsequent experimental measurements that will be described.
Date:
December 29, 2006
Creator:
Mendez, A J; Hernandez, V J; Gagliardi, R M & Bennett, C V
Object Type:
Article
System:
The UNT Digital Library