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580 Matching Results
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Alignment strategy for the ATLAS tracker
The ATLAS experiment is a multi-purpose particle detector that will study high-energy particle collisions produced by the Large Hadron Collider. For the reconstruction of charged particles, and their production and their decay vertices, ATLAS is equipped with a sophisticated tracking system, unprecedented in size and complexity. Full exploitation of both the Inner Detector and the muon spectrometer requires an accurate alignment. The challenge of aligning the ATLAS tracking devices is discussed, and the ATLAS alignment strategy is presented and illustrated with both data and Monte Carlo results.
Date:
September 23, 2007
Creator:
ATLAS & Golling, T.
Object Type:
Article
System:
The UNT Digital Library
Propuesta metodológica para el control de calidad de datos de precipitación
Article discussing a methodological proposal for the quality control of precipitation data.
Date:
October 23, 2007
Creator:
Ablan, Magdiel; Andressen, Rigoberto; Vargas, Mary Pili & Acevedo, Miguel F.
Object Type:
Article
System:
The UNT Digital Library
Biomass and Biofuels: Technology and Economic Overview
Presentation on biomass and biofuels technology and economics presented at Pacific Northwest National Laboratory, May 23, 2007.
Date:
May 23, 2007
Creator:
Aden, Andy
Object Type:
Presentation
System:
The UNT Digital Library
Smart Energy Management of Multiple Full Cell Powered Applications
In this research project the University of South Alabama research team has been investigating smart energy management and control of multiple fuel cell power sources when subjected to varying demands of electrical and thermal loads together with demands of hydrogen production. This research has focused on finding the optimal schedule of the multiple fuel cell power plants in terms of electric, thermal and hydrogen energy. The optimal schedule is expected to yield the lowest operating cost. Our team is also investigating the possibility of generating hydrogen using photoelectrochemical (PEC) solar cells through finding materials for efficient light harvesting photoanodes. The goal is to develop an efficient and cost effective PEC solar cell system for direct electrolysis of water. In addition, models for hydrogen production, purification, and storage will be developed. The results obtained and the data collected will be then used to develop a smart energy management algorithm whose function is to maximize energy conservation within a managed set of appliances, thereby lowering O/M costs of the Fuel Cell power plant (FCPP), and allowing more hydrogen generation opportunities. The Smart Energy Management and Control (SEMaC) software, developed earlier, controls electrical loads in an individual home to achieve load management objectives …
Date:
April 23, 2007
Creator:
Alam, MOhammad S.
Object Type:
Report
System:
The UNT Digital Library
Smart Energy Management of Multiple Full Cell Powered Applications
In this research project the University of South Alabama research team has been investigating smart energy management and control of multiple fuel cell power sources when subjected to varying demands of electrical and thermal loads together with demands of hydrogen production. This research has focused on finding the optimal schedule of the multiple fuel cell power plants in terms of electric, thermal and hydrogen energy. The optimal schedule is expected to yield the lowest operating cost. Our team is also investigating the possibility of generating hydrogen using photoelectrochemical (PEC) solar cells through finding materials for efficient light harvesting photoanodes. The goal is to develop an efficient and cost effective PEC solar cell system for direct electrolysis of water. In addition, models for hydrogen production, purification, and storage will be developed. The results obtained and the data collected will be then used to develop a smart energy management algorithm whose function is to maximize energy conservation within a managed set of appliances, thereby lowering O/M costs of the Fuel Cell power plant (FCPP), and allowing more hydrogen generation opportunities. The Smart Energy Management and Control (SEMaC) software, developed earlier, controls electrical loads in an individual home to achieve load management objectives …
Date:
April 23, 2007
Creator:
Alam, Mohammad S.
Object Type:
Report
System:
The UNT Digital Library
Oral History Interview with Nila Jackson Alderson, April 23, 2007
Transcript of an oral interview with Nila Jackson Alderson. Born in 1925, Alderson describes life before and during the war in rural Texas as well as in the town of Burnet, Texas . Her husband, Joe Alderson, served in the military in Europe. They both discuss the mail service during the war. The interview includes information about her parents and siblings.
Date:
April 23, 2007
Creator:
Alderson, Nila Jackson
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Nila Jackson Alderson, April 23, 2007
Transcript of an oral interview with Nila Jackson Alderson. Born in 1925, Alderson describes life before and during the war in rural Texas as well as in the town of Burnet, Texas . Her husband, Joe Alderson, served in the military in Europe. They both discuss the mail service during the war. The interview includes information about her parents and siblings.
Date:
April 23, 2007
Creator:
Alderson, Nila Jackson
Object Type:
Text
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 25, No. 34, Ed. 1 Thursday, August 23, 2007
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
August 23, 2007
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Production of Neutrals and Their and Effects on the Ion Chargestates in Cathodic Vacuum Arc Plasmas
Cathodic arc plasmas are considered fully ionized and theycontain multiply charged ions, yet, gaseous and metal neutrals can bepresent. It is shown that they can cause a significant reduction of theion charge states as measured far from the cathode spots. Several cathodematerials were used to study the evolution the mean ion charge state as afunction of time after arc ignition. The type of cathode material, arccurrent amplitude, intentionally increased background gas, additionalsurfaces placed near the plasma flow, and other factors influence thedegree of charge state reduction because all of these factors influencethe density of neutrals. In all cases, it was found that the mean ioncharge state follows an exponential decay of first order, Q(t) = A *exp(t/tau) + Qss, where A is a parameter describing the importance of thedecay, tau is the characteristic decay time, and Qss is a steady-statevalue approached for continuous arc operation. The extrapolated valuesQ(t-->0) indicate surprisingly high mean charge states as produced atcathode spots and not "skewed" by charge exchange collisions withneutrals.
Date:
May 23, 2007
Creator:
Anders, Andre; Oks, Efim M. & Yushkov, Georgy Yu.
Object Type:
Article
System:
The UNT Digital Library
Fast Neutron Radioactivity and Damage Studies on Materials
None
Date:
July 23, 2007
Creator:
Anderson, S.; Spencer, J.; Wolf, Z.; Gallagher, G.; Pellett, D.; Boussoufi, M. et al.
Object Type:
Article
System:
The UNT Digital Library
Materials and Process Design for High-Temperature Carburizing: Integrating Processing and Performance
The objective of the project is to develop an integrated process for fast, high-temperature carburizing. The new process results in an order of magnitude reduction in cycle time compared to conventional carburizing and represents significant energy savings in addition to a corresponding reduction of scrap associated with distortion free carburizing steels.
Date:
July 23, 2007
Creator:
Apelian, D.
Object Type:
Text
System:
The UNT Digital Library
Individuals with Disabilities Education Act (IDEA): Analysis of Changes Made by P.L. 108-446
Congressional Research Service (CRS) report entailing an analysis of changes made to the Individuals with Disabilities Act (IDEA). Changes to the act include: changes is compliance monitoring to focus on student performance, changes to safeguarding, and a requirement that all special education teachers be highly educated. There are tables on page 4 and page 8, with the report concluding with other miscellaneous provisions.
Date:
January 23, 2007
Creator:
Apling, Richard N. & Jones, Nancy Lee
Object Type:
Report
System:
The UNT Digital Library
SALT FOG TEST OF SAM2X5 COATED STAINLESS STEEL CYLINDER
A salt fog test of an iron-based amorphous metal, SAM2X5, coated Type 316L stainless steel (SS316L) cylinder was made. The cylinder was 30-inch diameter by 88-inch long, and 3/8-inch thick. One end was welded shut with a SS316L end cap before coating. The body of the cylinder and the end cap were both coated. The cylinder was coated with SAM2X5 by the HVOF thermal spray process. The coating thickness was 0.015-inch to 0.019-inch thick. The cylinder was tested in a horizontal position. Also included in the test for reference purposes were five coupons (2-inch x 2-inch x 1/8-inch) of uncoated Type 1018 carbon steel (1018CS). The test used an abbreviated form of GM 9540P. Each cycle was 6 hours in duration and the cylinder and reference samples were exposed to a total of eight cycles. The cylinder was in relatively good condition after the test. Along the body of the cylinder only two pinpoint spot sized signs of rust were seen. The 1018CS reference specimens were extensively rusted.
Date:
April 23, 2007
Creator:
Aprigliano, L F; Rebak, R B; Choi, J; Lian, T & Day, S D
Object Type:
Article
System:
The UNT Digital Library
NATO and the European Union
This report addresses several questions central to the debate over European security and the future of the broader transatlantic relationship that may be of interest in the 110th Congress.
Date:
January 23, 2007
Creator:
Archick, Kristin & Gallis, Paul
Object Type:
Report
System:
The UNT Digital Library
Renewable Energy Technology Opportunities: Responding to Global Energy Challenges
Presentation by Dr. Dan Arvizu of the National Renewable Energy Laboratory (NREL) to the Clean-Tech Investors Summit on January 23, 2007 overviews renewable energy technology opportunities.
Date:
January 23, 2007
Creator:
Arvizu, D.
Object Type:
Presentation
System:
The UNT Digital Library
Measurement of the Branching Fractions for the Decays B+ tp rho+ gamma, B0 to rho0 gamma, and B0 to omega gamma
None
Date:
May 23, 2007
Creator:
Aubert, B.; Barate, R.; Bona, M.; Boutigny, D.; Couderc, F.; Karyotakis, Y. et al.
Object Type:
Article
System:
The UNT Digital Library
Solution to Monthly Problem 11277
None
Date:
March 23, 2007
Creator:
Bailey, David H. & Borwein, Jonathan M.
Object Type:
Report
System:
The UNT Digital Library
Element-specific spin and orbital momentum dynamics of Fe/Gdmultilayers
The role of orbital magnetism in the laser-induced demagnetization of Fe/Gd multilayers was investigated using time-resolved X-ray magnetic circular dichroism at 2-ps time resolution given by an x-ray streak camera. An ultrafast transfer of angular momentum from the spin via the orbital momentum to the lattice was observed which was characterized by rapidly thermalizing spin and orbital momenta. Strong interlayer exchange coupling between Fe and Gd led to a simultaneous demagnetization of both layers.
Date:
March 23, 2007
Creator:
Bartelt, A. F.; Comin, A.; Feng, J.; Nasiatka, J. R.; Eimuller, T.; Ludescher, B. et al.
Object Type:
Article
System:
The UNT Digital Library
Multi-Mission Capable, High g Load mW RPS
Over the past few years Hi-Z has been developing a wide range of mW generators and life testing thermoelectric modules for the Department of Energy (DOE) to fulfill requirements by NASA Ames and other agencies. The purpose of this report is to determine the capabilities of a wide range of mW generators for various missions. In the 1st quarterly report the power output of various mW generators was determined via thermal and mechanical modeling. The variable attributes of each generator modeled were: the number of RHUs (1-8), generator outer diameter (1.25-4 in.), and G-load (10, 500, or 2,000). The resultant power output was as high as 180 mW for the largest generator with the lowest Gload. Specifically, we looked at the design of a generator for high G loading that is insulated with Xenon gas and multifoil solid insulation. Because the design of this new generator varied considerably from the previous generator design, it was necessary to show in detail how it is to be assembled, calculate them as of the generator and determine the heat loss from the system. A new method of assembling the RHU was also included as part of the design. As a side issue we …
Date:
May 23, 2007
Creator:
Bass, John C.; Hiller, Nathan; Jovanovic, Velimir & Elsner, Norbert B.
Object Type:
Report
System:
The UNT Digital Library
[Kelsey Campbell standing at yearbook table]
Photograph of Kelsey Campbell, a staffer who designed the layouts and solicited ads for the 2008 yearbook, standing by the UNT yearbook table on the Library Mall during Mean Green Fling. There is a bike rack behind her and a poster with pictures and the words "Yes, we have a yearbook" on it. She is pointing and touching pencils in a cup.
Date:
August 23, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Mark Packer on motorcycle]
Photograph of Mark Packer, the overseer of UNT's Union Programs, sitting on a motorcycle on a ramp in the Union. There are wall hangings and a railing behind him.
Date:
August 23, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Mark Packer on motorcycle in Union]
Photograph of Mark Packer, the overseer of UNT's Union Programs, sitting on a motorcycle on a ramp in the Union. There are wall hangings and a railing behind him.
Date:
August 23, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Students fighting in inflatable boxing ring]
Photograph of students in the University Union fighting in an inflatable boxing ring. They are wearing helmets for safety and giant inflatable boxing gloves during the 'Fall Collision' event.
Date:
August 23, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Students gathered for Fall Collision]
Photograph of students in the University Union gathered by an inflatable boxing ring during the 'Fall Collision' event. The two inside of the ring are wearing helmets for safety and giant inflatable boxing gloves.
Date:
August 23, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library