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[Channel 5 interview with Curtis King on "An Evening with an American Actress"]

Description: Video footage from The Black Academy of Arts and Letters recorded during a channel 5 interview with Curtis King aired on January 31st, 2003. The interview focuses on the topic of the upcoming one-woman show "An Evening with an American Actress" featuring Oscar and Emmy nominated actress Cicely Tyson. King spills the details on her performance with an outline of the evening and what the audience should expect.
Date: January 31, 2003
Duration: 3 minutes 28 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
open access

Quantifying the Contribution of Lubrication Oil Carbon to Particulate Emissions from a Diesel Engine

Description: The contribution of lubrication oil to particulate matter (PM) emissions from a Cummins B5.9 Diesel engine was measured using accelerator mass spectrometry to trace carbon isotope concentrations. The engine operated at fixed medium load (285 N-m (210 ft.lbs.) at 1600 rpm) used 100% biodiesel fuel (8100) with a contemporary carbon-14 ({sup 14}C) concentration of 103 amol {sup 14}C mg C. The {sup 14}C concentration of the exhaust CO{sub 2} and PM were 102 and 99 amol {sup 14}C/mg C, respectively. The decrease in {sup 14}C content in the CO, and PM are due to the consumption of lubrication oil which is {sup 14}C-free. Approximately 4% of the carbon in PM came from lubrication oil under these operating conditions.
Date: January 31, 2003
Creator: Buchholz, B. A.; Dibble, R. W.; Rich, D. & Cheng, A. S.
Partner: UNT Libraries Government Documents Department
open access

Multi-Resolution Modeling of Large Scale Scientific Simulation Data

Description: This paper discusses using the wavelets modeling technique as a mechanism for querying large-scale spatio-temporal scientific simulation data. Wavelets have been used successfully in time series analysis and in answering surprise and trend queries. Our approach however is driven by the need for compression, which is necessary for viable throughput given the size of the targeted data, along with the end user requirements from the discovery process. Our users would like to run fast queries to check the validity of the simulation algorithms used. In some cases users are welling to accept approximate results if the answer comes back within a reasonable time. In other cases they might want to identify a certain phenomena and track it over time. We face a unique problem because of the data set sizes. It may take months to generate one set of the targeted data; because of its shear size, the data cannot be stored on disk for long and thus needs to be analyzed immediately before it is sent to tape. We integrated wavelets within AQSIM, a system that we are developing to support exploration and analyses of tera-scale size data sets. We will discuss the way we utilized wavelets decomposition in our domain to facilitate compression and in answering a specific class of queries that is harder to answer with any other modeling technique. We will also discuss some of the shortcomings of our implementation and how to address them.
Date: January 31, 2003
Creator: Baldwin, Chuck; Abdulla, Ghaleb & Critchlow, Terence
Partner: UNT Libraries Government Documents Department
open access

Planetary Interior in the Laboratory

Description: In the three years of this project, we have provided a complete database of the electrical conductivity of planetary materials to 180 GPa. The electrical conductivities of these planetary materials now provide a basis for future modeling of planets taking into account full magnetohydrodynamics. By using a full magnetohydrodynamics simulation, the magnetic fields of the planets can then be taken into account. Moreover, the electrical conductivities of the planetary materials have given us insight into the structure and nature of these dense fluids. We showed that simple monoatomic fluids such as hydrogen, nitrogen, and oxygen at planetary interior conditions undergo a common metallization process which can be explained on a simple basis of their radial charge density distributions. This model also shows that the metallization process is actually rather common and likely to take place in a number of materials such as carbon monoxide which is also present within planetary objects. On the other hand, we have also showed that a simple two component fluid like water and methane take on much different behaviors than say nitrogen due to the chemical interactions within these systems. The dynamics of an even more complex system, ''synthetic Uranus'' are still being analyzed but suggest that on some levels the behavior is very simple, i.e. the electrical conductivity is essentially the same as water, but the local dynamics are very complex. This project has shed much light on the nature of electrical transport within planetary interiors but also has shown that understanding chemical processes in the complex fluids within planetary interiors to be very important. Understanding those local interactions and processes is required to gain further insight into planetary interiors.
Date: January 31, 2003
Creator: Chau, R; Bastea, M; Mitchell, A C; Minich, R W & Nellis, W J
Partner: UNT Libraries Government Documents Department
open access

Scientific Data Management Center Scientific Data Integration

Description: The Internet is becoming the preferred method for disseminating scientific data from a variety of disciplines. This has resulted in information overload on the part of the scientists, who are unable to query all of the relevant sources, even if they knew where to find them, what they contained, how to interact with them, and how to interpret the results. Thus instead of benefiting from this information rich environment, scientists become experts on a small number of sources and use those sources almost exclusively. Enabling information based scientific advances, in domains such as functional genomics, requires fully utilizing all available information. We are developing an end-to-end solution using leading-edge automatic wrapper generation, mediated query, and agent technology that will allow scientists to interact with more information sources than currently possible. Furthermore, by taking a workflow-based approach to this problem, we allow them to easily adjust the dataflow between the various sources to address their specific research needs.
Date: January 31, 2003
Creator: Critchlow, T J; Liu, L; Pu, C; Gupta, A; Ludaescher, B; Altintas, I et al.
Partner: UNT Libraries Government Documents Department
open access

The Abstract Machine Model for Transaction-based System Control

Description: Recent work applying statistical mechanics to economic modeling has demonstrated the effectiveness of using thermodynamic theory to address the complexities of large scale economic systems. Transaction-based control systems depend on the conjecture that when control of thermodynamic systems is based on price-mediated strategies (e.g., auctions, markets), the optimal allocation of resources in a market-based control system results in an emergent optimal control of the thermodynamic system. This paper proposes an abstract machine model as the necessary precursor for demonstrating this conjecture and establishes the dynamic laws as the basis for a special theory of emergence applied to the global behavior and control of complex adaptive systems. The abstract machine in a large system amounts to the analog of a particle in thermodynamic theory. The permit the establishment of a theory dynamic control of complex system behavior based on statistical mechanics. Thus we may be better able to engineer a few simple control laws for a very small number of devices types, which when deployed in very large numbers and operated as a system of many interacting markets yields the stable and optimal control of the thermodynamic system.
Date: January 31, 2003
Creator: Chassin, David P.
Partner: UNT Libraries Government Documents Department
open access

Delta Electroproduction in 12-C

Description: The Delta-nucleus potential is a crucial element in the understanding of the nuclear system. Previous electroexcitation measurements in the delta region reported a Q2 dependence of the delta mass indicating that this potential is dependent on the momentum of the delta. Such a dependence is not observed for protons and neutrons in the nuclear medium. This thesis presents the experimental study of the electroexcitation of the delta resonance in 12C, performed using the high energy electron beam at the Thomas Jefferson National Accelerator Facility, and the near 4(pie) acceptance detector CLAS that enables the detection of the full reaction final state. Inclusive, semi inclusive, and exclusive cross sections were measured with an incident electron beam energy of 1.162GeV over the Q2 range 0.175-0.475 (GeV/c)2. A Q2 dependence of the delta mass was only observed in the exclusive measurements indicating that the delta-nucleus potential is affected by the momentum of the delta.
Date: January 31, 2003
Creator: McLauchlan, Steven
Partner: UNT Libraries Government Documents Department
open access

Multi-color light curves of type Ia supernovae on thecolor-magnitude diagram: A novel step toward more precise distance andextinction estimates

Description: We show empirically that fits to the color-magnituderelation of Type Ia supernovae after optical maximum can provide accuraterelative extragalactic distances. We report the discovery of an empiricalcolor relation for Type Ia light curves: During much of the first monthpast maximum, the magnitudes of Type Ia supernovae defined at a givenvalue of color index have a very small magnitude dispersion; moreover,during this period the relation between B magnitude and B-V color (or B-Ror B-I color) is strikingly linear, to the accuracy of existingwell-measured data. These linear relations can provide robust distanceestimates, in particular, by using the magnitudes when the supernovareaches a given color. After correction for light curve stretch factor ordecline rate, the dispersion of the magnitudes taken at the intercept ofthe linear color-magnitude relation are found to be around 0^m .08 forthe sub-sample of supernovae with (B_max - V_max) ?= 0^m 0.5, andaround 0^m.11 for the sub-sample with (B_max - V_max) ?= 0^m .2.This small dispersion is consistent with being mostly due toobservational errors. The method presented here and the conventionallight curve fitting methods can be combined to further improvestatistical dispersions of distance estimates. It can be combined withthe magnitude at maximum to deduce dust extinction. Theslopes of thecolor-magnitude relation may also be used to identify intrinsicallydifferent SN Ia systems. The method provides a tool that is fundamentalto using SN Ia to estimate cosmological parameters such as the Hubbleconstant and the mass and dark energy content of theuniverse.
Date: January 31, 2003
Creator: Wang, Lifan; Goldhaber, Gerson; Aldering, Greg & Perlmutter, Saul
Partner: UNT Libraries Government Documents Department
open access

EnergyWeb Screening Criteria Report

Description: This report describes a framework for evaluating candidate participants in the Bonneville Power Administration's (BPA) EnergyWeb program. The framework includes definition of system goals, relevant material that characterizes a distributed energy resource (DER) participant, rules for evaluating candidate participants, and a process that utilizes this information to produce a list of the most attractive candidates.
Date: January 31, 2003
Creator: Widergren, Steven E.; Guttromson, Ross T. & Baechler, Michael C.
Partner: UNT Libraries Government Documents Department
open access

Focused R&D For Electrochromic Smart Windowsa: Significant Performance and Yield Enhancements

Description: There is a need to improve the energy efficiency of building envelopes as they are the primary factor governing the heating, cooling, lighting and ventilation requirements of buildings--influencing 53% of building energy use. In particular, windows contribute significantly to the overall energy performance of building envelopes, thus there is a need to develop advanced energy efficient window and glazing systems. Electrochromic (EC) windows represent the next generation of advanced glazing technology that will (1) reduce the energy consumed in buildings, (2) improve the overall comfort of the building occupants, and (3) improve the thermal performance of the building envelope. ''Switchable'' EC windows provide, on demand, dynamic control of visible light, solar heat gain, and glare without blocking the view. As exterior light levels change, the window's performance can be electronically adjusted to suit conditions. A schematic illustrating how SageGlass{reg_sign} electrochromic windows work is shown in Figure I.1. SageGlass{reg_sign} EC glazings offer the potential to save cooling and lighting costs, with the added benefit of improving thermal and visual comfort. Control over solar heat gain will also result in the use of smaller HVAC equipment. If a step change in the energy efficiency and performance of buildings is to be achieved, there is a clear need to bring EC technology to the marketplace. This project addresses accelerating the widespread introduction of EC windows in buildings and thus maximizing total energy savings in the U.S. and worldwide. We report on R&D activities to improve the optical performance needed to broadly penetrate the full range of architectural markets. Also, processing enhancements have been implemented to reduce manufacturing costs. Finally, tests are being conducted to demonstrate the durability of the EC device and the dual pane insulating glass unit (IGU) to be at least equal to that of conventional windows.
Date: January 31, 2003
Creator: Burdis, Mark & Sbar, Neil
Partner: UNT Libraries Government Documents Department
open access

Estate and Gift Taxes: Economic Issues

Description: This report discusses how the estate and gift tax works and examines various policy options. The Economic Growth and Tax Relief Reconciliation Act of 2001 (EGTRRA, P.L. 107-16) repeals the estate tax after 2009. In the 108th Congress, some policymakers have proposed eliminating the sunset provision in the EGTRRA, thus making repeal of the estate tax permanent.
Date: January 31, 2003
Creator: Gravelle, Jane G. & Maguire, Steven
Partner: UNT Libraries Government Documents Department
open access

Temporal development of the plasma composition of Zr and Cr metal plasma streams in a N2 environment

Description: We describe the temporal development of the plasma composition in a pulsed plasma stream generated by cathodic arc. Cathodes of Zr and Cr were operated at various nitrogen pressures. The time resolved plasma composition for the cathode materials was analyzed with time-of-flight charge-to-mass spectrometry, and was found to be a strong function of the nitrogen pressure. Large plasma composition gradients were detected within the first 60 {micro}s of the pulse, the nitrogen ion concentration increasing with increasing pressure. The results are explained by the formation and erosion of a compound layer formed at the cathode surface in the presence of a reactive gas. The average charge state was also found to be affected by the reactive gas pressure as well as by the time after ignition. The charge states were highest in the beginning of the pulse at low nitrogen pressure, decreasing to a steady-state value at higher pressure. These results are of importance for reactive plasma processing and for controlling of the evolution of thin film composition and microstructure.
Date: January 31, 2003
Creator: Rosen, Johanna; Anders, Andre; Hultman, Lars & Schneider, Jochen M.
Partner: UNT Libraries Government Documents Department
open access

The Status of Thermophotovoltaic Energy Conversion Technology at Lockheed Martin Corp.

Description: In a thermophotovoltaic (TPV) energy conversion system, a heated surface radiates in the mid-infrared range onto photodiodes which are sensitive at these energies. Part of the absorbed energy is converted into electric output. Conversion efficiency is maximized by reducing the absorption of non-convertible energy with some form of spectral control. In a TPV system, many technology options exist. The development efforts have concentrated on flat-plate geometries with greybody radiators, low bandgap quaternary diodes, front surface tandem filters and a multi-chip module (MCM) approach that allows selective fabrication processes to match diode performance. Recently, the authors achieved conversion efficiencies of about 20% (radiator 950 C, diodes 22 C) for a module in a prototypic cavity test environment. These tests employed InGaAsSb diodes with 0.52 eV bandgap and front surface filters for spectral control. This paper provides details of the individual system components and describes the measurement technique used to record these efficiencies.
Date: January 31, 2003
Creator: Brown, E. J.; Baldasaro, P. F.; Burger, S. R.; Danielson, L. R.; DePoy, D. M.; Nichols, G. J. et al.
Partner: UNT Libraries Government Documents Department
open access

TFTR D&D Project: Final Examination and Testing of the TFTR TF-Coils

Description: In operation for nearly 15 years, TFTR (Tokamak Fusion Test Reactor) was not only a fusion science milestone, but a milestone of achievement in engineering as well. The TFTR D&D (Decommissioning and Decontamination) program provided a rare opportunity to examine machine components that had been exposed to a unique performance environment of greater than 100,000 mechanical and thermal load cycles. In particular, the possible examination of the TFTR toroidal-field (TF) coils, which met, then exceeded, the 5.2 Tesla magnetic field machine specification, could supply the answers to many questions that have been asked and debated since the coils were originally designed and built. A test program conducted in parallel with the D&D effort was the chance to look inside and examine, in detail, the TFTR TF coils for the first time since they were delivered encased to PPPL (Princeton Plasma Physics Laboratory). The results from such a program would provide data and insight that would not only be nefit PPPL and the fusion community, but the broader scientific community as well.
Date: January 31, 2003
Creator: Zatz, Irving J.
Partner: UNT Libraries Government Documents Department
open access

ULTRA-LIGHTWEIGHT CEMENT

Description: The objective of this project is to develop an improved ultra-lightweight cement using ultra-lightweight hollow glass spheres (ULHS). This report discusses testing that was performed for analyzing the alkali-silica reactivity of ULHS in cement slurries. DOE joined the Materials Management Service (MMS)-sponsored joint industry project ''Long-Term Integrity of Deepwater Cement under Stress/Compaction Conditions.'' Results of the project contained in two progress reports are also presented in this report.
Date: January 31, 2003
Creator: Sabins, Fred
Partner: UNT Libraries Government Documents Department
open access

High Energy Physics Division semiannual report of research activities, January 1, 2002 - June 30, 2002.

Description: This report describes the research conducted in the High Energy Physics Division of Argonne National Laboratory during the period of January 1 through June 30, 2002. Topics covered here include experimental and theoretical particle physics, advanced accelerator physics, detector development, and experimental facilities research. Lists of Division publications and colloquia are included.
Date: January 31, 2003
Creator: Spinka, H. M.; Nodulman, L. J.; Goodman, M. C.; Repond, J.; Cadman, R.; Ayres, D. S. et al.
Partner: UNT Libraries Government Documents Department
open access

Oil Bypass Filter Technology Performance Evaluation - First Quarterly Report

Description: This report details the initial activities to evaluate the performance of the oil bypass filter technology being tested by the Idaho National Engineering and Environmental Laboratory (INEEL) for the U.S. Department of Energy's FreedomCAR & Vehicle Technologies Program. Eight full-size, four-cycle diesel-engine buses used to transport INEEL employees on various routes have been equipped with oil bypass systems from the puraDYN Corporation. Each bus averages about 60,000 miles a year. The evaluation includes an oil analysis regime to monitor the presence of necessary additives in the oil and to detect undesirable contaminants. Very preliminary economic analysis suggests that the oil bypass system can reduce life-cycle costs. As the evaluation continues and oil avoidance costs are quantified, it is estimated that the bypass system economics may prove increasingly favorable, given the anticipated savings in operational costs and in reduced use of oil and waste oil avoidance.
Date: January 31, 2003
Creator: Zirker, L.R. & Francfort, J.E.
Partner: UNT Libraries Government Documents Department
open access

NERSC Annual Report 2002

Description: The National Energy Research Scientific Computing Center (NERSC) is the primary computational resource for scientific research funded by the DOE Office of Science. The Annual Report for FY2002 includes a summary of recent computational science conducted on NERSC systems (with abstracts of significant and representative projects), and information about NERSC's current and planned systems and service
Date: January 31, 2003
Creator: Hules, John
Partner: UNT Libraries Government Documents Department
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