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2,577 Matching Results
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SUBCONTRACT REPORT-Power Module Investigationfor High Temperature (175-200 degrees C) Automotive Application
None
Date:
April 1, 2007
Creator:
Marlino, Laura D & McCluskey, Dr. F. Patrick
Object Type:
Report
System:
The UNT Digital Library
Sustainable Harvest for Food and Fuel
The DOE Biomass Program recently implemented the Biofuels Initiative, or 30x30 program, with the dual goal of reducing U.S. dependence on foreign oil by making cellulosic ethanol cost competitive with gasoline by 2012 and by replacing 30 percent of gasoline consumption with biofuels by 2030. Experience to date with increasing ethanol production suggests that it distorts agricultural markets and therefore raises concerns about the sustainability of the DOE 30 X 30 effort: Can the U.S. agricultural system produce sufficient feedstocks for biofuel production and meet the food price and availability expectations of American consumers without causing environmental degradation that would curtail the production of both food and fuel? Efforts are underway to develop computer-based modeling tools that address this concern and support the DOE 30 X 30 goals. Beyond technical agronomic and economic concerns, however, such models must account for the publics’ growing interest in sustainable agriculture and in the mitigation of predicted global climate change. This paper discusses ongoing work at the Center for Advanced Energy Studies that investigates the potential consequences and long-term sustainability of projected biomass harvests by identifying and incorporating “sustainable harvest indicators” in a computer modeling strategy.
Date:
April 1, 2007
Creator:
Grosshans, Raymond R.; Kostelnik, Kevin, M. & Jacobson, Jacob J.
Object Type:
Article
System:
The UNT Digital Library
Sustainable Harvest for Food and Fuel Preliminary Food & Fuel Gap Analysis Report
To promote economic growth and energy security, and to protect the environment, the U.S. is pursuing a national strategy of energy independence and climatic protection in which domestic renewable carbon-neutral biofuels displace 30 percent of U.S. oil consumption by the mid-21st century. Such fuels, including ethanol and biodiesel, will be produced from biological feed stocks (biomass). The availability of this billion-ton biomass will hinge on the application of modern scientific and engineering tools to create a highly-integrated biofuel production system. Efforts are underway to identify and develop energy crops, ranging from agricultural residues to genetically engineered perennials; to develop biology-based processing methods; and, to develop large-scale biorefineries to economically convert biomass into fuels. In addition to advancing the biomass-to-biofuel research and development agenda, policy makers are concurrently defining the correct mix of governmental supports and regulations. Given the volumes of biomass and fuels that must flow to successfully enact a national biomass strategy, policies must encourage large-scale markets to form and expand around a tightly integrated system of farmers, fuel producers and transporters, and markets over the course of decades. In formulating such policies, policy makers must address the complex interactions of social, technical, economic, and environmental factors that bound …
Date:
April 1, 2007
Creator:
Grosshans, Ray; Kostelnik, Kevin M. & Jacobson, Jake
Object Type:
Report
System:
The UNT Digital Library
A System for Exchanging Control and Status Messages in the NOVA Data Acquisition
In preparation for NOvA, a future neutrino experiment at Fermilab, we are developing a system for passing control and status messages in the data acquisition system. The DAQ system will consist of applications running on approximately 450 nodes. The message passing system will use a publish-subscribe model and will provide support for sending messages and receiving the associated replies. Additional features of the system include a layered architecture with custom APIs tailored to the needs of a DAQ system, the use of an open source messaging system for handling the reliable delivery of messages, the ability to send broadcasts to groups of applications, and APIs in Java, C++, and Python. Our choice for the open source system to deliver messages is EPICS. We will discuss the architecture of the system, our experience with EPICS, and preliminary test results.
Date:
April 1, 2007
Creator:
Biery, K. A.; Cooper, R. G.; Foulkes, S. C.; Guglielmo, G. M.; Piccoli, L. P. & Votava, M. E. V.
Object Type:
Article
System:
The UNT Digital Library
Take the Next Step Toward Your Energy Efficiency and Renewable Energy Goals (Revised)
The fact sheet is about the Technical Assistance Project, which provides state and local officials access to U.S. Department of Energy laboratory experts in renewable energy and energy efficiency.
Date:
April 1, 2007
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
T Tank Farm Interim Surface Barrier Demonstration--Vadose Zone Monitoring Plan
The Hanford Site has 149 underground single-shell tanks that store hazardous radioactive waste. Many of these tanks and their associated infrastructure (e.g., pipelines, diversion boxes) have leaked. Some of the leaked waste has entered the groundwater. The largest known leak occurred from the T-106 Tank in 1973. Many of the contaminants from that leak still reside within the vadose zone beneath the T Tank Farm. CH2M Hill Hanford Group, Inc. seeks to minimize movement of this residual contaminant plume by placing an interim barrier on the surface. Such a barrier is expected to prevent infiltrating water from reaching the plume and moving it further. A plan has been prepared to monitor and determine the effectiveness of the interim surface barrier. Soil water content and water pressure will be monitored using off-the-shelf equipment that can be installed by the hydraulic hammer technique. In fiscal year 2006, two instrument nests were installed. Each instrument nest contains a neutron probe access tube, a capacitance probe, four heat-dissipation units, and a drain gauge to measure soil water flux. A meteorological station has been installed outside of the fence. In fiscal year 2007, two additional instrument nests are planned to be installed beneath the proposed …
Date:
April 1, 2007
Creator:
Zhang, Z. F.; Keller, Jason M. & Strickland, Christopher E.
Object Type:
Report
System:
The UNT Digital Library
A taxonomy and comparison of parallel block multi-level preconditioners for the incompressible Navier-Stokes equations.
In recent years, considerable effort has been placed on developing efficient and robust solution algorithms for the incompressible Navier-Stokes equations based on preconditioned Krylov methods. These include physics-based methods, such as SIMPLE, and purely algebraic preconditioners based on the approximation of the Schur complement. All these techniques can be represented as approximate block factorization (ABF) type preconditioners. The goal is to decompose the application of the preconditioner into simplified sub-systems in which scalable multi-level type solvers can be applied. In this paper we develop a taxonomy of these ideas based on an adaptation of a generalized approximate factorization of the Navier-Stokes system first presented in [25]. This taxonomy illuminates the similarities and differences among these preconditioners and the central role played by efficient approximation of certain Schur complement operators. We then present a parallel computational study that examines the performance of these methods and compares them to an additive Schwarz domain decomposition (DD) algorithm. Results are presented for two and three-dimensional steady state problems for enclosed domains and inflow/outflow systems on both structured and unstructured meshes. The numerical experiments are performed using MPSalsa, a stabilized finite element code.
Date:
April 1, 2007
Creator:
Shadid, John Nicolas (Sandia National Laboratories, Albuquerque, NM); Elman, Howard (University of Maryland, College Park, MD); Shuttleworth, Robert R. (University of Maryland, College Park, MD); Howle, Victoria E. & Tuminaro, Raymond Stephen
Object Type:
Report
System:
The UNT Digital Library
Texas Highways, Volume 54, Number 4, April 2007
Monthly travel magazine discussing locations and events in Texas to encourage travel within the state.
Date:
April 2007
Creator:
Texas. Travel Information Division.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
The Texas Hummer, Spring 2007
Newsletter for participants of the annual Texas Hummingbird Roundup, containing articles related to hummingbirds and providing a breakdown of information about where in Texas various hummingbirds were sighted.
Date:
April 2007
Creator:
Texas. Parks and Wildlife Department. Nongame and Urban Wildlife Program.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Labor Market Review, April 2007
Monthly newsletter documenting statistics related to employment in Texas including nonagricultural job trends, labor force numbers, and other relevant indicators as well as information on related topics.
Date:
April 2007
Creator:
Texas Workforce Commission. Labor Market Information.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Parks & Wildlife, Volume 65, Number 4, April 2007
Magazine discussing natural resources, parks, hunting and fishing, and other information related to the outdoors in Texas.
Date:
April 2007
Creator:
Texas. Parks and Wildlife Department.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Travel Log, April 2007
Newsletter dedicated to traveling in Texas, including information about news, locations, and events of interest to visitors as well as statistics and summaries of travel in the state.
Date:
April 2007
Creator:
Texas. Department of Transportation.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Thermochemical Ethanol via Indirect Gasification and Mixed Alcohol Synthesis of Lignocellulosic Biomass
This process design and technoeconomic evaluation addresses the conversion of biomass to ethanol via thermochemical pathways that are expected to be demonstrated at the pilot level by 2012.
Date:
April 1, 2007
Creator:
Phillips, S.; Aden, A.; Jechura, J.; Dayton, D. & Eggeman, T.
Object Type:
Report
System:
The UNT Digital Library
[Things Fall Apart Edible Book]
Photograph of unknown materials on a silver tray at the 2007 Edible Books Festival. A plastic fork and knife are visible at the bottom of the image as well as a text card that reads, "Things Fall Apart."
Date:
April 2007
Creator:
Mears, Michelle M.
Object Type:
Photograph
System:
The UNT Digital Library
[TIL press release for April 15, 2007]
Press release containing a list of winners for each award at the Texas Institute of Letters (TIL) awards banquet held on April 14, 2007.
Date:
April 2007
Creator:
Texas Institute of Letters
Object Type:
Text
System:
The UNT Digital Library
A Time-Slotted On-Demand Routing Protocol for Mobile Ad Hoc Unmanned Vehicle Systems
The popularity of UAVs has increased dramatically because of their successful deployment in military operations, their ability to preserve human life, and the continual improvements in wireless communication that serves to increase their capabilities. We believe the usefulness of UAVs would be dramatically increased if formation flight were added to the list of capabilities. Currently, sustained formation flight with a cluster of UAVs has only been achieved with two nodes by the Multi-UAV Testbed at the Massachusetts Institute of Technology. (Park, 2004) Formation flight is a complex operation requiring the ability to adjust the flight patterns on the fly and correct for wind gusts, terrain, and differences in node equipment. All of which increases the amount of inner node communication. Since one of the problems with MANET communication is network congestion, we believe a first step towards formation flight can be made through improved inner node communication. We have investigated current communication routing protocols and developed an altered hybrid routing protocol in order to provide communication with less network congestion.
Date:
April 1, 2007
Creator:
Forsmann, Hope; Hiromoto, Robert & Svoboda, John
Object Type:
Article
System:
The UNT Digital Library
Tissues from the irradiated dog/mouse archive
The purpose of this project is to organize the databases/information and organize and move the tissues from the long-term dog (4,000 dogs) and mouse (over 30,000 mice) radiation experiments done at Argonne National Laboratory during the 1970's and 80's to Northwestern University. These studies were done with the intention of understanding the effects of exposure to radiation at a variety of different doses, dose-rates, and radiation qualities on end-points such as life-shortening, carcinogenesis, cause of death, shifts in disease incidence and other biological parameters. Organ and tissue samples from these animals including cancers, metastases and other significant degenerative and inflammatory lesions and those in a regular protocol of normal tissues were preserved in paraffin blocks, tissue impressions and sections and represent a great resource for the radiation biology community. These collections are particularly significant since these experiments are not likely to be repeated because of the extreme cost of monies and time for such large-scale animal studies. The long-term goal is to make these tissues and databases available to the wider scientific community so that questions such as tissue sensitivity, early and late effects, low dose and protracted dose responses of normal and tumor tissues, etc. can be examined and …
Date:
April 1, 2007
Creator:
Woloschak, Gayle
Object Type:
Text
System:
The UNT Digital Library
Transportation News, Volume 32, Number 4, April 2007
Newsletter published by the Texas Department of Transportation for TxDOT employees including information about the organization, projects throughout the state, and other topics related to transportation in Texas.
Date:
April 2007
Creator:
Texas. Department of Transportation.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
[Treasure Island Edible Book]
Photograph of cake with blue icing decorated with an "island" made of crushed peanut M&Ms and a treasure chest at the 2007 Edible Books Festival. A text card at the bottom of the photo reads, "Treasure Island."
Date:
April 2007
Creator:
Mears, Michelle M.
Object Type:
Photograph
System:
The UNT Digital Library
TurbSim User's Guide: Revised February 2007 for Version 1.21
This report provides a user's guide for the TurbSim code developed to provide a numerical simulation of a full-field flow that contains coherent turbulence structures.
Date:
April 1, 2007
Creator:
Jonkman, B. J. & Buhl, M. L., Jr.
Object Type:
Report
System:
The UNT Digital Library
Ultrasonic Examination of Double-Shell Tank 241-AN-107. Examination Completed March 2007
AREVA NC Inc. (AREVA), under a contract from CH2M Hill Hanford Group (CH2M Hill), has performed an ultrasonic examination of selected portions of Double-Shell Tank 241-AN-107. PNNL is responsible for preparing a report(s) that describes the results of the AREVA ultrasonic examinations. The purpose of this examination was to provide information that could be used to evaluate the integrity of the wall of the primary tank. The requirements for the ultrasonic examination of Tank 241-AN-107 were to detect, characterize (identify, size, and locate), and record measurements made of any wall thinning, pitting, or cracks that might be present in the wall of the primary tank. Any measurements that exceed the requirements set forth in the Engineering Task Plan (ETP), RPP-Plan-27202 (Jensen 2005) and summarized on page 1 of this document, are to be reported to CH2M Hill and the Pacific Northwest National Laboratory (PNNL) for further evaluation. Under the contract with CH2M Hill, all data is to be recorded on electronic media and paper copies of all measurements are provided to PNNL for third-party evaluation. PNNL is responsible for preparing a report(s) that describes the results of the AREVA ultrasonic examinations. The results of the examination of Tank 241-AN-107 have …
Date:
April 1, 2007
Creator:
Pardini, Allan F. & Weier, Dennis R.
Object Type:
Report
System:
The UNT Digital Library
Ultrasonic Examination of Double-Shell Tank 241-AW-103. Examination Completed September 2006
AREVA NC Inc. (AREVA), under a contract from CH2M Hill Hanford Group (CH2M Hill), has performed an ultrasonic examination of selected portions of Double-Shell Tank 241-AW-103. PNNL is responsible for preparing a report(s) that describes the results of the AREVA ultrasonic examinations. The purpose of this examination was to provide information that could be used to evaluate the integrity of the wall of the primary and secondary tank. The requirements for the ultrasonic examination of Tank 241-AW-103 were to detect, characterize (identify, size, and locate), and record measurements made of any wall thinning, pitting, or cracks that might be present in the wall of the primary tank and the wall of the secondary tank. Any measurements that exceed the requirements set forth in the Engineering Task Plan (ETP), RPP-Plan-27202 (Jensen 2005) and summarized on page 1 of this document, are to be reported to CH2M Hill and the Pacific Northwest National Laboratory (PNNL) for further evaluation. Under the contract with CH2M Hill, all data is to be recorded on electronic media and paper copies of all measurements are provided to PNNL for third-party evaluation. PNNL is responsible for preparing a report(s) that describes the results of the AREVA ultrasonic examinations. …
Date:
April 1, 2007
Creator:
Pardini, Allan F.; Posakony, Gerald J. & Weier, Dennis R.
Object Type:
Report
System:
The UNT Digital Library
The University News (Irving, Tex.), Vol. 37, Ed. 1 Sunday, April 1, 2007
Weekly student newspaper from the University of Dallas in Irving, Texas that includes campus news and commentaries along with advertising.
Date:
April 1, 2007
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
University Reactor Conversion Lessons Learned Workshop for Texas A&M University Nuclear Science Center Reactor
The objectives of this meeting were to capture the observations, insights, issues, concerns, and ideas of those involved in the Texas A&M University Nuclear Science Center (TAMU NSC) TRIGA Reactor Conversion so that future efforts can be conducted with greater effectiveness, efficiency, and with fewer challenges. This workshop was held in conjunction with a similar workshop for the University of Florida Reactor Conversion. Some of the generic lessons from that workshop are included in this report for completeness.
Date:
April 1, 2007
Creator:
Woolstenhulme, Eric C. & Meyer, Dana M.
Object Type:
Report
System:
The UNT Digital Library