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[Draft of a letter from a group of AIDS agencies to the AIDS ARMS Network, November 22, 1991]
A copy of a draft of a letter from a variety of agencies working with patients with AIDS to the AIDS ARMS Network about their dispersal of federal and state funds.
Date:
November 22, 1991
Creator:
AIDS Resource Center
Object Type:
Letter
System:
The UNT Digital Library
Initial performance of the SLD Cherenkov Ring Imaging Detector system
All of the major subsystems for the barrel Cherenkov Ring Imaging Detector (CRID) in the SLD at SLAC have now been commissioned. The CRID participated in the SLD engineering run of June--August 1991. In a cosmic ray test at the end of the run, Cherenkov rings were observed for the first time. Initial data from the CRID, including Cherenkov rings, studies of minimum ionizing particles, and data from the fiber optics calibration system are presented here.
Date:
November 1, 1991
Creator:
Abe, K.; Hasegawa, K.; Suekane, F.; Yuta, H. (Tohoku Univ., Sendai (Japan). Dept. of Physics); Antilogus, P.; Aston, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Performance of the front end electronics and data acquisition system for the SLD Cherenkov Ring Imaging Detector
The front end electronics and data acquisition system for the SLD barrel Cherenkov Ring Imaging Detector (CRID) are described. This electronics must provide a 1% charge division measurement with a maximum acceptable noise level of 2000 electrons (rms). Noise and system performance results are presented for the initial SLD engineering run data.
Date:
November 1, 1991
Creator:
Abe, K.; Hasegawa, K.; Suekane, F.; Yuta, H. (Tohoku Univ., Sendai (Japan). Dept. of Physics); Antilogus, P.; Aston, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Initial performance of the SLD Cherenkov Ring Imaging Detector system
All of the major subsystems for the barrel Cherenkov Ring Imaging Detector (CRID) in the SLD at SLAC have now been commissioned. The CRID participated in the SLD engineering run of June--August 1991. In a cosmic ray test at the end of the run, Cherenkov rings were observed for the first time. Initial data from the CRID, including Cherenkov rings, studies of minimum ionizing particles, and data from the fiber optics calibration system are presented here.
Date:
November 1, 1991
Creator:
Abe, K.; Hasegawa, K.; Suekane, F.; Yuta, H.; Antilogus, P.; Aston, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Performance of the front end electronics and data acquisition system for the SLD Cherenkov Ring Imaging Detector
The front end electronics and data acquisition system for the SLD barrel Cherenkov Ring Imaging Detector (CRID) are described. This electronics must provide a 1% charge division measurement with a maximum acceptable noise level of 2000 electrons (rms). Noise and system performance results are presented for the initial SLD engineering run data.
Date:
November 1, 1991
Creator:
Abe, K.; Hasegawa, K.; Suekane, F.; Yuta, H.; Antilogus, P.; Aston, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Progress and commissioning of the SLD Cherenkov Ring Imaging Detector
We report the recent progress of the SLD Cherenkov Ring Imaging Detector. All of the individual components of the device (TPC's, mirrors, liquid radiator trays) have been completed and installed. Almost half of the electronics packages are installed and operational, and the data acquisition system has been commissioned. The liquid C{sub 6}F{sub 14} recirculation system is functioning. The drift gas supply systems are operating well with TMAE, and the gaseous Freon C{sub 5}F{sub 12} recirculator is being brought on-line. Our monitor and control systems are fully functional. The commissioning of all 40 TPCs at full operating voltage has gone very smoothly. The system shows a remarkable immunity to the SLC backgrounds, and yields very clean events, while operating with a single electron sensitivity.
Date:
November 1, 1991
Creator:
Abe, K.; Hasegawa, K.; Suekane, F.; Yuta, H.; Antilogus, P.; Aston, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Progress and commissioning of the SLD Cherenkov Ring Imaging Detector. Revision
We report the recent progress of the SLD Cherenkov Ring Imaging Detector. All of the individual components of the device (TPC`s, mirrors, liquid radiator trays) have been completed and installed. Almost half of the electronics packages are installed and operational, and the data acquisition system has been commissioned. The liquid C{sub 6}F{sub 14} recirculation system is functioning. The drift gas supply systems are operating well with TMAE, and the gaseous Freon C{sub 5}F{sub 12} recirculator is being brought on-line. Our monitor and control systems are fully functional. The commissioning of all 40 TPCs at full operating voltage has gone very smoothly. The system shows a remarkable immunity to the SLC backgrounds, and yields very clean events, while operating with a single electron sensitivity.
Date:
November 1, 1991
Creator:
Abe, K.; Hasegawa, K.; Suekane, F.; Yuta, H.; Antilogus, P.; Aston, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Design, development and evaluation of a precision air bearing rotary table with large diameter through-hole
A large diameter precision air bearing rotary table with a 16.0 inch diameter through-hole was designed, fabricated and tested in the course of this research. The rotary table will be used in conjunction with a specialized, computer controlled precision inspection machine being designed for the Department of Energy`s (DOE) Nuclear Weapons Complex (NWC). The design process included a complete engineering analysis to predict the final performance of the rotary table, and to ensure that the rotary table meets the required accuracy of 4.0 microinches of total radial (3.5 microinches average radial) and 4.0 microinches total axial (3.5 microinches average axial) errors. The engineering analysis included structural deformation, thermal sensitivity and dynamic analyses using finite element methods in some cases, as well as other analytic solutions. Comparisons are made between predicted and tested values, which are listed in the rotary table error budget. The rotary table performed as predicted with measured axial and radial stiffnesses of 1.1E06 lbf/inch and 2.9E06 lbf/inch, respectively, as well as average radial, axial and tilt errors of 2.5 microinches, 1.5 microinches, and less than 0.05 arcseconds, respectively.
Date:
November 1, 1991
Creator:
Accatino, M. R.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Ecological Responses of Venezuelan Savannas to Global Climate Change: Workshop Report
Report from a workshop on ecological responses of Venezuelan savannas to global climate change.
Date:
November 1, 1991
Creator:
Acevedo, Miguel F.; Andressen, Rigoberto; Azocar, Aura; Canales, Josune; Coughenour, Michael B.; GarcÃa, Carlos et al.
Object Type:
Report
System:
The UNT Digital Library
Status of the O. alpha. calculation of e sup + e sup - yields W sup + W sup - yields 4f(gamma)
We consider the full process e{sup +}e{sup {minus}} {yields} W{sup +}W{sup {minus}} {yields} 4f. We show that the off-shell effect are sizable and comparable to radiative effects. We give the exact results for hard bremsstrahlung processes e{sup +}e{sup {minus}} {yields} (4f + {gamma}) and the results of the O({alpha}) improved cross sections for e{sup +}e{sup {minus}} {yields} W{sup +}W{sup {minus}} including photon radiation. The status of the virtual corrections to the 4f-process is described.
Date:
November 1, 1991
Creator:
Aeppli, A.
Object Type:
Article
System:
The UNT Digital Library
Status of the O{alpha} calculation of e{sup +}e{sup -} {yields} W{sup +}W{sup -} {yields} 4f(gamma)
We consider the full process e{sup +}e{sup {minus}} {yields} W{sup +}W{sup {minus}} {yields} 4f. We show that the off-shell effect are sizable and comparable to radiative effects. We give the exact results for hard bremsstrahlung processes e{sup +}e{sup {minus}} {yields} (4f + {gamma}) and the results of the O({alpha}) improved cross sections for e{sup +}e{sup {minus}} {yields} W{sup +}W{sup {minus}} including photon radiation. The status of the virtual corrections to the 4f-process is described.
Date:
November 1, 1991
Creator:
Aeppli, A.
Object Type:
Article
System:
The UNT Digital Library
A New VME Based High Voltage Power Supply for Large Experiments
A new VME based high voltage power supply has been developed for the D{O} experiment at Fermilab. There are three types of supplies delivering up to {plus minus}5.6 kV at 1.0 mA or +2.0 kV at 3.0 mA with a set accuracy of 1.5 V and extremely low voltage ripples. Complete computer control has allowed many special features to be developed for the supply, including user-defined control land monitor groups, variable ramp rates, and advanced histogram and graphic functions. 3 refs.
Date:
November 1, 1991
Creator:
Ahn, S. C.; Angstadt, R. D.; Droege, T. F.; Johnson, M. E.; MacKinnon, B. A.; McNulty, S. E. et al.
Object Type:
Article
System:
The UNT Digital Library
A new VME based high voltage power supply for large experiments
A new VME based high voltage power supply has been developed for the D{O} experiment at Fermilab. There are three types of supplies delivering up to {plus_minus}5.6 kV at 1.0 mA or +2.0 kV at 3.0 mA with a set accuracy of 1.5 V and extremely low voltage ripples. Complete computer control has allowed many special features to be developed for the supply, including user-defined control land monitor groups, variable ramp rates, and advanced histogram and graphic functions. 3 refs.
Date:
November 1, 1991
Creator:
Ahn, S. C.; Angstadt, R. D.; Droege, T. F.; Johnson, M. E.; MacKinnon, B. A.; McNulty, S. E. et al.
Object Type:
Article
System:
The UNT Digital Library
Ultrafine calcium aerosol: Generation and use as a sorbent for sulfur in coal combustion. Volume 1, Experimental work: Final report, August 1, 1988--October 31, 1991
Studies conducted at Ohio University and elsewhere have demonstrated that ultrafine aerosols, which have the highest surface area per unit mass, have enhanced potential to efficiently remove sulfur dioxide form combustion gases. Therefore it is proposed to generate a very fine aerosol calcium-rich sorbent (or similar aerosols) for gas conditioning. The aerosol will be generated by vaporization of the sorbent compound and subsequent homogeneous nucleation. In experimental studies liquids as well as solids will be converted into ultrafine aerosols by using suitable aerosol generator. The aerosol generator could be a simple bubbler or a flame spray jet using powders of calcium ``Compounds. Studies will then be carried out, to determine the dynamics of sulfur dioxide capture by the ultrafine aerosol. The primary objective of this research was to generate fine aerosols and to use them for coal combustion SO{sub 2}/NO{sub x} gas removal purposes. From the background study on the dry scrubbing system, it can be concluded that the most important experimental parameters are addition ratio, reactor temperature, residence time, total inlet flow rate and inlet SO{sub 2} concentration. Addition ratio is the inlet molar ratio of calcium to sulfur. Before any experimentation, it was necessary to decide and investigate …
Date:
November 1, 1991
Creator:
Alam, M. K.; Nahar, N. U.; Stewart, G. D. & Prudich, M. E.
Object Type:
Report
System:
The UNT Digital Library
Ultrafine calcium aerosol: Generation and use of a sorbent for sulfur in coal combustion. Volume 2, Economics: Final report, August 1, 1988--October 31, 1991
The goal of this study is to determine the cost effectiveness of using calcium-hydroxide powder sorbent in a commercial power plant flue gas desulfurization (FGD) application. The cost analysis methodology found herein is a direct application of the one found in the January 1986 report, ``Economic Evaluation of Dry-Injection Flue Gas Desulfurization Technology by the Electric Power Research Institute (EPRI). The EPRI study addresses the economic issue of installing a dry-injection FGD system on a 1000 MW (2-500 MW units) power plant using sodium-rich powder sorbents derived from nahcolite and trona ores. In this report`s treatment, the calcium-based derivatives of hydrated limestone are compared directly to nahcolite and trona for both low and high sulfur coals. This type of evaluation is allowable due to the similar material handling properties of 1/4 inch hydrated limestone in comparison to those properties for nahcolite and trona. Thus, this report repeats the EPRI cost analysis for a slightly modified limestone-based FGD design. Note that the calculation methodology is not discussed, in this report as it has already been outlined in the EPRI study. Instead, Appendices A and B contain copies of the calculation spreadsheets based on the EPRI method for the hydrated limestone system.
Date:
November 1, 1991
Creator:
Alam, M. K.; Nahar, N. U.; Stewart, G. D. & Prudich, M. E.
Object Type:
Report
System:
The UNT Digital Library
Photovoltaic manufacturing technology, Phase 1. Final subcontract report, 9 January 1991--14 April 1991
This report summarizes the analysis of photovoltaic module manufacturing done by Photon Energy, Inc. Photon Energy's four-stage expansion plan for photovoltaic module manufacturing is explained. Explored and studied were the following: current capabilities in manufacturing and process development, potential for increasing production and reducing manufacturing costs, problems likely to impede increased production and reduced manufacturing costs, and costs and other requirements involved in overcoming problems in manufacturing technology.
Date:
November 1, 1991
Creator:
Albright, S.
Object Type:
Report
System:
The UNT Digital Library
Interdiffusion and grain-boundary migration in Au-Cu bilayers during ion-irradiation
Ion irradiation and annealing experiments have been conducted on Au/Cu bilayer films to evaluate the effect of irradiation on diffusion-induced grain boundary migration (DIGM). The Au films were prepared with a large-grained microstructure with grain boundaries perpendicular to the film surface and extending through the film thickness. Irradiations were conducted with 1.5 MeV Kr at 228{degree}C. Rutherford backscattering spectrometry of the samples revealed that interdiffusion was substantially enhanced in the irradiated area relative to the unirradiated area. Both irradiated and annealed-only areas were characterized by a nearly uniform composition of 14 at.% and 7 at.% Cu respectively through the entire thickness of the underlying Au film. Small probe X-ray energy dispersive spectroscopy showed significant lateral compositional homogeneities in both irradiated and annealed areas. These two results are consistent with previous observations of DIGM in the Au/Cu system, suggesting that this previously unexamined mechanism contributes to ion beam mixing.
Date:
November 1, 1991
Creator:
Alexander, D. E.; Rehn, L. E. & Baldo, P. M.
Object Type:
Article
System:
The UNT Digital Library
Interdiffusion and grain-boundary migration in Au-Cu bilayers during ion-irradiation
Ion irradiation and annealing experiments have been conducted on Au/Cu bilayer films to evaluate the effect of irradiation on diffusion-induced grain boundary migration (DIGM). The Au films were prepared with a large-grained microstructure with grain boundaries perpendicular to the film surface and extending through the film thickness. Irradiations were conducted with 1.5 MeV Kr at 228{degree}C. Rutherford backscattering spectrometry of the samples revealed that interdiffusion was substantially enhanced in the irradiated area relative to the unirradiated area. Both irradiated and annealed-only areas were characterized by a nearly uniform composition of 14 at.% and 7 at.% Cu respectively through the entire thickness of the underlying Au film. Small probe X-ray energy dispersive spectroscopy showed significant lateral compositional homogeneities in both irradiated and annealed areas. These two results are consistent with previous observations of DIGM in the Au/Cu system, suggesting that this previously unexamined mechanism contributes to ion beam mixing.
Date:
November 1, 1991
Creator:
Alexander, D. E.; Rehn, L. E. & Baldo, P. M.
Object Type:
Article
System:
The UNT Digital Library
Eight channel - 16 bit, bidirectional analog to digital monitoring and control system
The DIII-D tokamak facility is currently upgrading its electron cyclotron resonance heating (ECH) system. The new system is based on 110 GHz gyrotrons developed by Varian. As part of this upgrade, the superconducting magnet power supplies were required to be remotely controlled and monitored accurately. The 110 GHz gyrotron superconducting magnet has eight coils, that are energized by current regulating power supplies. An analog to digital (A/D) system was designed to allow remote coil current monitoring and power supply programming. The A/D system is an eight channel multiplexed, 16 bit, bidirectional, fiber optically linked, analog to digital telemetry system. Design concerns and trade-offs will be discussed as will the results of in system use.
Date:
November 1, 1991
Creator:
Allen, J. C.; Callis, R. W.; Cary, W. P.; Harris, T. E. & Nerem, A.
Object Type:
Article
System:
The UNT Digital Library
Eight channel - 16 bit, bidirectional analog to digital monitoring and control system
The DIII-D tokamak facility is currently upgrading its electron cyclotron resonance heating (ECH) system. The new system is based on 110 GHz gyrotrons developed by Varian. As part of this upgrade, the superconducting magnet power supplies were required to be remotely controlled and monitored accurately. The 110 GHz gyrotron superconducting magnet has eight coils, that are energized by current regulating power supplies. An analog to digital (A/D) system was designed to allow remote coil current monitoring and power supply programming. The A/D system is an eight channel multiplexed, 16 bit, bidirectional, fiber optically linked, analog to digital telemetry system. Design concerns and trade-offs will be discussed as will the results of in system use.
Date:
November 1, 1991
Creator:
Allen, J. C.; Callis, R. W.; Cary, W. P.; Harris, T. E. & Nerem, A.
Object Type:
Article
System:
The UNT Digital Library
Southwest Retort, Volume 45, Number 3, November 1991
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date:
November 1991
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
The Eastern Statesman (Wilburton, Okla.), Vol. 67, No. 7, Ed. 1 Thursday, November 7, 1991
Biweekly student newspaper from Eastern Oklahoma State College in Wilburton, Oklahoma that includes local, state, and campus news along with advertising.
Date:
November 7, 1991
Creator:
Anderson, Rob & Heath, Melissa
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Eastern Statesman (Wilburton, Okla.), Vol. 67, No. 8, Ed. 1 Thursday, November 21, 1991
Biweekly student newspaper from Eastern Oklahoma State College in Wilburton, Oklahoma that includes local, state, and campus news along with advertising.
Date:
November 21, 1991
Creator:
Anderson, Rob & Heath, Melissa
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The design of a hardware testing system for the D Zero Detector
Testing a system as large as the D Zero data acquisition system is difficult. This paper describes the use of IBM compatible personal computers in a hardware test system that can run on any size system from an engineer's test bench to the entire subsystem in the D Zero Detector. The test system uses a PC to VME bus interface for the local testing and the Token Ring network for more global testing. This system has been implemented for several different hardware systems in D Zero.
Date:
November 1, 1991
Creator:
Angstadt, R.; Johnson, M.; Martin, M.; Matulik, M. & Utes, M.
Object Type:
Article
System:
The UNT Digital Library