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418 Matching Results
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High performance anti-reflection coatings for broadband multi-junction solar cells
The success of bandgap engineering has made high efficiency broadband multi-junction solar cells possible with photo-response out to the band edge of Ge. Modeling has been conducted which suggests that current double layer anti-reflection coating technology is not adequate for these devices in certain cases. Approaches for the development of higher performance anti-reflection coatings are examined. A new AR coating structure based on the use of Herpin equivalent layers is presented. Optical modeling suggests a decrease in the solar weighted reflectance of over 2.5{percent} absolute as a result. This structure requires no additional optical material development and characterization because no new optical materials are necessary. Experimental results and a sensitivity analysis are presented.
Date:
February 23, 2000
Creator:
AIKEN,DANIEL J.
Object Type:
Article
System:
The UNT Digital Library
Commodity multi-processor systems in the ATLAS level-2 trigger
Low cost SMP (Symmetric Multi-Processor) systems provide substantial CPU and I/O capacity. These features together with the ease of system integration make them an attractive and cost effective solution for a number of real-time applications in event selection. In ATLAS the authors consider them as intelligent input buffers (active ROB complex), as event flow supervisors or as powerful processing nodes. Measurements of the performance of one off-the-shelf commercial 4-processor PC with two PCI buses, equipped with commercial FPGA based data source cards (microEnable) and running commercial software are presented and mapped on such applications together with a long-term program of work. The SMP systems may be considered as an important building block in future data acquisition systems.
Date:
May 23, 2000
Creator:
Abolins, M.; Blair, R.; Bock, R.; Bogaerts, A.; Dawson, J.; Ermoline, Y. et al.
Object Type:
Article
System:
The UNT Digital Library
Leptoquark searches at the Tevatron
The authors report on searches for leptoquarks using approximately 100 pb {sup -1} of data collected by CDF and DO during Run I at the Tevatron. They also present searches for resonantly-produced leptoquarks that arise in technicolor models. Prospects for future leptoquark searches using Run II data are also discussed.
Date:
June 23, 2000
Creator:
Acosta, Darin E.
Object Type:
Article
System:
The UNT Digital Library
Tank Characterization Report for Double Shell Tank (DST) 241-AN-107
This report interprets information about the tank answering a series of six questions covering areas such as information drivers, tank history, tank comparisons, disposal implications, data quality and quantity, and unique aspects of the tank.
Date:
March 23, 2000
Creator:
Adams, M. R.
Object Type:
Report
System:
The UNT Digital Library
Explicit SO(10) supersymmetric grand unified model
A complete set of Higgs and matter superfields is introduced with well-defined SO(10) properties and U(1) x Z{sub 2} x Z{sub 2} family charges from which the Higgs and Yukawa superpotentials are constructed. The Higgs fields solve the doublet-triplet splitting problem, while the structures of the four Dirac fermion mass matrices obtained involve just six effective Yukawa operators. The right-handed Majorana matrix arises from one Higgs field coupling to several pairs of superheavy conjugate neutrino singlets. In terms of 10 input parameters to the mass matrices, the model accurately yields the 20 masses and mixings of the lightest quarks and leptons, as well as the masses of the 3 heavy right-handed neutrinos. The bimaximal atmospheric and solar neutrino vacuum solutions are favored in this simplest version.
Date:
June 23, 2000
Creator:
Albright, Carl H. & Barr, S. M.
Object Type:
Article
System:
The UNT Digital Library
Effective Outreach to Hispanic Communities
Lecture given Wednesday, February 23, 2000, 3:30 PM at Abilene Christian University: "Numerically, theologically and ministerialy, Spanish-speaking Churches of Christ have grown out of the roots of Catholicism, Pentecostalism and influences known as curanderismo (ethnobotany or folk healing)."
Date:
February 23, 2000
Creator:
Alvarez, Abel & Blackwell, Mike
Object Type:
Sound
System:
The Portal to Texas History
History of Iglesias de Cristo to the Present
Lecture given Wednesday, February 23, 2000, 8:30 AM at Abilene Christian University: "Numerically, theologically and ministerialy, Spanish-speaking Churches of Christ have grown out of the roots of Catholicism, Pentecostalism and influences known as curanderismo (ethnobotany or folk healing)."
Date:
February 23, 2000
Creator:
Alvarez, Abel & Blackwell, Mike
Object Type:
Sound
System:
The Portal to Texas History
Ideologies That Have Shaped Hispanic Spirituality
Lecture given Wednesday, February 23, 2000, 11:00 AM at Abilene Christian University: "Numerically, theologically and ministerialy, Spanish-speaking Churches of Christ have grown out of the roots of Catholicism, Pentecostalism and influences known as curanderismo (ethnobotany or folk healing)."
Date:
February 23, 2000
Creator:
Alvarez, Abel & Blackwell, Mike
Object Type:
Sound
System:
The Portal to Texas History
Customer satisfaction assessment at the Pacific Northwest National Laboratory
The Pacific Northwest National Laboratory (PNNL) is developing and implementing a customer satisfaction assessment program (CSAP) to assess the quality of research and development provided by the laboratory. This report presents the customer survey component of the PNNL CSAP. The customer survey questionnaire is composed of two major sections: Strategic Value and Project Performance. Both sections contain a set of questions that can be answered with a 5-point Likert scale response. The strategic value section consists of five questions that are designed to determine if a project directly contributes to critical future national needs. The project Performance section consists of nine questions designed to determine PNNL performance in meeting customer expectations. A statistical model for customer survey data is developed and this report discusses how to analyze the data with this model. The properties of the statistical model can be used to establish a gold standard or performance expectation for the laboratory, and then to assess progress. The gold standard is defined using laboratory management input--answers to four questions, in terms of the information obtained from the customer survey: (1) What should the average Strategic Value be for the laboratory project portfolio? (2) What Strategic Value interval should include most …
Date:
March 23, 2000
Creator:
Anderson, DN & Sours, ML
Object Type:
Report
System:
The UNT Digital Library
Wireless handheld scanners integrated with waste tracking
The US Department of Energy (DOE) Idaho National Engineering and Environmental Laboratory (INEEL) has embraced mobile wireless technology to help the disposition of hazardous and mixed radiological waste. The following paper describes one application the INEEL developed to increase the data accuracy and near-real time reporting requirements for waste management. With the continuous operational demands at the ''site'', it was difficult to sustain an accurate, up-to-date database required for regulatory compliance audits and reporting. Incorporating wireless mobile technology, the INEEL was able to increase the accuracy while reducing the data delay times previously encountered. Installation issues prolonged the project along with obstacles encountered with operations personnel. However, the success of this project was found in persistence and management support as well as the technology itself. Future wireless, mobile computing will continue at the INEEL for years to come based on a successful project that was able to integrate new technology to an existing waste management system with proven, increased data accuracy.
Date:
July 23, 2000
Creator:
Anderson, R. S.
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with James Arquette, June 23, 2000
The National Museum of the Pacific War presents an interview with James Arquette. Arquette joined the Navy in February of 1942. He completed flight training, and was assigned to a fighter squadron. Beginning November of 1942, he served as a pilot aboard USS Lexington (CV-16). He participated in raids on Wake Island and the Gilbert Islands. He later transferred to USS Randolph (CV-15), participating in the Okinawa invasion. He returned to the US and was discharged in October of 1945. Arquette continued his service and retired in 1963.
Date:
June 23, 2000
Creator:
Arquette, James
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with James Arquette, June 23, 2000
The National Museum of the Pacific War presents an interview with James Arquette. Arquette joined the Navy in February of 1942. He completed flight training, and was assigned to a fighter squadron. Beginning November of 1942, he served as a pilot aboard USS Lexington (CV-16). He participated in raids on Wake Island and the Gilbert Islands. He later transferred to USS Randolph (CV-15), participating in the Okinawa invasion. He returned to the US and was discharged in October of 1945. Arquette continued his service and retired in 1963.
Date:
June 23, 2000
Creator:
Arquette, James
Object Type:
Text
System:
The Portal to Texas History
Abraham: Sacrificing Your Faith
Lecture given Wednesday, February 23, 2000, 8:30 AM at Abilene Christian University: "A close reading of Genesis 12-50 demonstrates that the patriarchs provide an excellent model of spiritual formation and faith development for today's church."
Date:
February 23, 2000
Creator:
Ashlock, Rodney
Object Type:
Sound
System:
The Portal to Texas History
Jacob: Wrestling With Your Faith
Lecture given Wednesday, February 23, 2000, 11:00 AM at Abilene Christian University: "A close reading of Genesis 12-50 demonstrates that the patriarchs provide an excellent model of spiritual formation and faith development for today's church."
Date:
February 23, 2000
Creator:
Ashlock, Rodney
Object Type:
Sound
System:
The Portal to Texas History
Joseph: Preserving Your Faith
Lecture given Wednesday, February 23, 2000, 3:30 PM at Abilene Christian University: "A close reading of Genesis 12-50 demonstrates that the patriarchs provide an excellent model of spiritual formation and faith development for today's church."
Date:
February 23, 2000
Creator:
Ashlock, Rodney
Object Type:
Sound
System:
The Portal to Texas History
CST/FRIT Settling, CST Particle Size Reduction and CST Loading
This report documents the results of laboratory investigations into the hydrodynamic character of the CST compared to DWPF frit and discusses attempts to alter the hydrodynamic character of the CST. This report documents the manner in which this material was produced.
Date:
August 23, 2000
Creator:
Baich, M. A.
Object Type:
Report
System:
The UNT Digital Library
Today Cedar Hill (Duncanville, Tex.), Vol. 35, No. 35, Ed. 1 Thursday, November 23, 2000
Weekly newspaper published in Duncanville, Texas that includes local Cedar Hill, state, and national news along with advertising.
Date:
November 23, 2000
Creator:
Balentine, Kevin
Object Type:
Newspaper
System:
The Portal to Texas History
Metrology Measurement Capabilities
This document contains descriptions of Federal Manufacturing and Technologies (FM and T) Metrology capabilities, traceability flow charts, and the measurement uncertainty of each measurement capability. Metrology provides NIST traceable precision measurements or equipment calibration for a wide variety of parameters, ranges, and state-of-the-art uncertainties in laboratories that conform to the requirements of the Department of Energy Development and Production Manual Chapter 8.4, and ANSI/NCSL Z540-1 (equivalent to ISO Guide 25). FM and T Metrology laboratories are accredited by NVLAP for the parameters, ranges, and uncertainties listed in the specific scope of accreditation under NVLAP Lab code 200108-0. These parameters are summarized.
Date:
March 23, 2000
Creator:
Barnes, L. M.
Object Type:
Report
System:
The UNT Digital Library
News Bulletin (Castroville, Tex.), Vol. 41, No. 47, Ed. 1 Thursday, November 23, 2000
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
November 23, 2000
Creator:
Barnes, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
News Bulletin (Castroville, Tex.), Vol. 42, No. 12, Ed. 1 Thursday, March 23, 2000
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
March 23, 2000
Creator:
Barnes, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
Segmented Aluminum Honeycomb Characteristics in T-Direction, Dynamic Crush Environments
Thirteen segmented aluminum honeycomb samples (5 in. diameter and 1.5 in. height) have been crushed in an experimental configuration that uses a drop table impact machine. The 38.0 pcf bulk density samples are a unique segmented geometry that allows the samples to be crushed while maintaining a constant cross-sectional area. A crush weight of 175 lb was used to determine the rate sensitivity of the honeycomb's highest strength orientation, T-direction, in a dynamic environment of {approx}50 fps impact velocity. Experiments were conducted for two honeycomb manufacturers and at two temperatures, ambient and +165 F. Independent measurements of the crush force were made with a custom load cell and a force derived from acceleration measurements on the drop table using the Sum of Weighted Accelerations Technique with a Calibrated Force (SWAT-CAL). Normalized stress-strain curves for all thirteen experiments are included and have excellent repeatability. These data are strictly valid for material characteristics in the T orientation because the cross-sectional area of the honeycomb did not change during the crush. The dynamic crush data have a consistent increase in crush strength of {approximately}7--19% as compared to quasi-static data and suggest that dynamic performance may be inferred from static tests. An uncertainty analysis …
Date:
August 23, 2000
Creator:
Bateman, Vesta I.; Brown, Frederick A.; Nusser, Michael A. & Swanson, Lloyd H.
Object Type:
Report
System:
The UNT Digital Library
FY96-98 Summary Report Mercury: Next Generation Laser for High Energy Density Physics SI-014
The scope of the Mercury Laser project encompasses the research, development, and engineering required to build a new generation of diode-pumped solid-state lasers for Inertial Confinement Fusion (ICF). The Mercury Laser will be the first integrated demonstration of laser diodes, crystals, and gas cooling within a scalable laser architecture. This report is intended to summarize the progress accomplished during the first three years of the project. Due to the technological challenges associated with production of 900 nm diode-bars, heatsinks, and high optical-quality Yb:S-FAP crystals, the initial focus of the project was primarily centered on the R&D in these three areas. During the third year of the project, the R&D continued in parallel with the development of computer codes, partial activation of the laser, component testing, and code validation where appropriate.
Date:
May 23, 2000
Creator:
Bayramian, A.; Beach, R.; Bibeau, C.; Chanteloup, J.; Ebbers, C.; Emanuel, M. et al.
Object Type:
Report
System:
The UNT Digital Library
Engineering Task Plan for the Integrity Assessment Examination of Double Contained Receiver Tanks (DCRT) Catch Tanks and Ancillary facilities
This Engineering Task Plan (ETP) presents the integrity assessment examination of three DCRTs, seven catch tanks, and two ancillary facilities located in the 200 East and West Areas of the Hanford Site. The integrity assessment examinations, as described in this ETP, will provide the necessary information to enable the independently qualified registered professional engineer (IQRPE) to assess the condition and integrity of these facilities. The plan is consistent with the Double-Shell Tank Waste Transfer Facilities Integrity Assessment Plan.
Date:
May 23, 2000
Creator:
Becker, D. L.
Object Type:
Report
System:
The UNT Digital Library
University Press (Beaumont, Tex.), Vol. 76, No. 34, Ed. 1 Wednesday, February 23, 2000
Semiweekly newspaper from Lamar University in Beaumont, Texas that includes local, national, and campus news along with advertising.
Date:
February 23, 2000
Creator:
Bordeman, Christina
Object Type:
Newspaper
System:
The Portal to Texas History