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29,760 Matching Results
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What is the Appropriate Reference Condition for Determining the Efficiency? (Preprint)
Presented at 2001 NCPV Program Review Meeting: Discusses background of concentrator reference conditions, problems with direct reference spectrum, and avenues to achieve consensus for rating concentrator cells/modules.
Date:
October 1, 2001
Creator:
Emery, K. A.
Object Type:
Article
System:
The UNT Digital Library
What is the Appropriate Reference Condition for Optimizing Concentrator Cells? Preprint
This conference paper describes Consensus standards for determining the efficiency of a concentrator cell or module that have not been developed. NREL, Sandia National Laboratory, the Fraunhofer Institute for Solar Energy in Germany, and the Progress in Photovoltaics Efficiency Table authors have informally agreed upon concentrator-cell reference conditions. These conditions are 25C cell temperature, 1-sun=1000 W/m2 total irradiance, and the ASTM E891-87 direct-normal reference spectrum. Deficiencies in the direct reference spectrum are discussed, and a more representative reference spectrum for evaluating concentrator cells is proposed. The spectrum was generated by the SMARTS model, and the atmospheric parameters are as close as possible to the existing direct spectrum, with the exception that the aerosol optical depth at 500 nm is reduced from 0.27 to 0.085.
Date:
May 1, 2002
Creator:
Emery, K.; Myers, D. & Kurtz, S.
Object Type:
Article
System:
The UNT Digital Library
What Is the “Farm Bill”?
This report discusses the farm bill, which renewed about every five years, governs federal farm and food policy.
Date:
April 1, 2008
Creator:
Johnson, Renée
Object Type:
Report
System:
The UNT Digital Library
What is the microscopic response of a system driven far from equilibrium?
The central theme of this lecture is that there exists a surprisingly simple and general answer to the question posed in the title, provided that we frame the question statistically. I will present this result along with several derivations, and will discuss some of its implications and generalizations.
Date:
January 1, 2002
Creator:
Jarzynski, C. (Christopher)
Object Type:
Article
System:
The UNT Digital Library
What might U.S. homes and workplaces be like in the year 2020--and what are the implications for energy use?
Can lifestyle-based scenarios provide insight into the nature of energy use in our future buildings? Participants in a design charrette brainstormed ideas about the future of US homes and workplaces. The teams started from several descriptions of daily lifestyles, and developed specific building characteristics as the place settings for these narratives. In addition to the characterization of the physical environment, we also speculate as to the forces that would be influential in making these changes. Further reflection was made on the possible unintended consequences of these changes. The rationale for this exercise was to broaden the discussion on future energy use by looking at future scenarios in the context of everyday life.
Date:
May 1, 2002
Creator:
Diamond, Rick
Object Type:
Report
System:
The UNT Digital Library
What to Look for in the Accumulator Core Cooling Signal Suppression Measurements
This document explains what to look for in the signal suppression display produced by program P192 Pbar Accumulator Core Cooling Suppression Measurement. First we will give a quick overview of beam cooling and why we measure signal suppression. Beam cooling is a technique whereby the physical size and energy spread of a particle beam circulating in a storage ring is reduced without any accompanying beam loss. The goal is to compress the same number of particles into a beam of smaller size and energy spread. This is desirable for the Accumulator as it compensates for various mechanisms leading to growth of beamsize and/or loss of stored particles and makes space available so that more beam can be stored. It also allows us to provide a low emittance beam through the Main Injector into the Tevatron in order to maximize the collision rate. For further information on specific stochastic cooling systems see Chapter 5 of the Antiproton Source Rookie Book.
Date:
January 1, 2001
Creator:
Sondgeroth, Al & Vander Meulen, Dave
Object Type:
Report
System:
The UNT Digital Library
What's New: 2005 Spring Update
Newsletter features various articles of interest to state and alternative fuel provider fleets covered under EPAct.
Date:
June 1, 2005
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
What's New: Fall 2002 Update
Bi-annual newsletter features stories on MY 2003 AFV acquisitions, KeySpan Energy, biodiesel growth in MY 2001, compliance assessment program, and MY 2002 exemptions and credits.
Date:
September 1, 2002
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
What's New: Fall 2003 Update
Articles focus on changes in Ford and Chrysler's MY 2004 AFV offerings, funding availability for E85 infrastructure, upcoming AFV training opportunities, growth in biodiesel, and efforts to find fleets to comply with EPAct.
Date:
November 1, 2003
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
What's New: Fall 2004 Update
Newsletter updates covered fleets about online driver training availability, how to ease fleet manager transitions, E85 infrastructure toolkit, and preparing for reporting season.
Date:
October 1, 2004
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
What's New: Fall 2005 Update. EPAct Fleet Information and Regulations, State and Alternative Fuel Provider Rule Newsletter
Newsletter features various articles of interest to state and alternative fuel provider fleets covered under EPAct.
Date:
October 1, 2005
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
What's New: Fall 2006 Update
Newsletter details items of interest to state and alternative fuel provider fleets covered under EPAct.
Date:
October 1, 2006
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
What's New: Spring 2002 Update
Newsletter features stories on where to buy used AFVs, exemption guidance update, MY 2001 reporting statistics, Iowa DOT, and 2001 Washington Day presentations.
Date:
May 1, 2002
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Whats New: Spring 2004 Update
Articles focus on a training course available from EPAct and Clean Cities, flexibility in ordering AFVs for MY 2004/2005 vehicles, reporting reminders, a legislative update, and more.
Date:
June 1, 2004
Creator:
White, H.
Object Type:
Text
System:
The UNT Digital Library
What's New: Spring 2005 Update
Articles focus on subjects of interest to Federal agency fleets covered under EPAct and Executive Order 13149.
Date:
April 1, 2005
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Whats New: Summer 2004 Update; Federal Fleet Rule
Articles focus on a training course available from EPAct and Clean Cities, flexibility in ordering AFVs for MY 2004/2005, FedFleets 2004, and more.
Date:
July 1, 2004
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
What's New: Winter 2006
Articles focus on subjects of interest to Federal agency fleets covered under EPAct and Executive Order 13149.
Date:
January 1, 2006
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
What's New: Winter 2007 Update
Newsletter covers items of pertinence to fleets covered under the EPAct State and Alternative Fuel Provider Rule.
Date:
December 1, 2007
Creator:
unknown
Object Type:
Article
System:
The UNT Digital Library
What's New with the NGNGV Program? Next Generation Natural Gas Vehicle Program Newsletter, June 2002
A newsletter about what's new with the Next Generation Natural Gas Vehicle Program (NGNGV). This June 2002 update includes Phase II RFPs, Phase I update, and near-term engine development projects.
Date:
June 1, 2002
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
What's Up With Duct Tape
Recent research suggests that almost any tape can be made to work for a core-to-collar joint when perfectly applied. Given all the better choices available and all the problems that can and do occur in the field, we would not recommend that cloth-backed (natural) rubber-adhesive tapes be used, unless they can pass a suitable E2343 test. If visual degradation is an important factor, Oriented Polypropylene (OPP) and cloth-backed tapes should be avoided. While tapes that fail usually show visual degradation, the converse is not always true. We speculate, however, that visually degraded tapes are more likely to be susceptible to damage from vibration and other mechanical stresses. Conventional nylon straps are quite prone to fail at higher temperatures, but no systematic studies have yet been done across product classes. UL has proposed a new standard for straps, but the protocol for the current UL test does not, however, suggest that it would be a good indicator of durability. Products meeting the new UL standard for straps should be independently tested for the failure modes observed in the field and laboratory to determine if that test is a reasonable indicator of durability. Until a suitable test for strap durability exists, they …
Date:
March 1, 2005
Creator:
Walker, Iain S. & Sherman, Max H.
Object Type:
Article
System:
The UNT Digital Library
[Wheeler Avenue Baptist Church Anniversary: 2008]
Pamphlet outlining events for the 46th anniversary of Wheeler Avenue Baptist Church, including reflections on the history of the church, other upcoming events, congregational news, and other information of relevance to church members.
Date:
June 1, 2008
Creator:
Wheeler Avenue Baptist Church (Houston, Tex.)
Object Type:
Pamphlet
System:
The Portal to Texas History
[Wheeler Avenue Baptist Church Bulletin: April 1, 2001]
Church bulletin listing the order of worship for the 7:30 and 11:00 Sunday morning services at the Wheeler Avenue Baptist Church, as well as various notes about upcoming events, congregational news, and other information of relevance to church members.
Date:
April 1, 2001
Creator:
Wheeler Avenue Baptist Church (Houston, Tex.)
Object Type:
Pamphlet
System:
The Portal to Texas History
[Wheeler Avenue Baptist Church Bulletin: December 1, 2002]
Church bulletin listing the order of worship for the 7:30 and 11:00 Sunday morning services at the Wheeler Avenue Baptist Church, as well as various notes about upcoming events, congregational news, and other information of relevance to church members.
Date:
December 1, 2002
Creator:
Wheeler Avenue Baptist Church (Houston, Tex.)
Object Type:
Pamphlet
System:
The Portal to Texas History
[Wheeler Avenue Baptist Church Bulletin: July 1, 2001]
Church bulletin listing the order of worship for the 7:30 and 11:00 Sunday morning services at the Wheeler Avenue Baptist Church, as well as various notes about upcoming events, congregational news, and other information of relevance to church members.
Date:
July 1, 2001
Creator:
Wheeler Avenue Baptist Church (Houston, Tex.)
Object Type:
Pamphlet
System:
The Portal to Texas History