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Chapter 9: Electronics

Description: Sophisticated front-end electronics are a key part of practically all modern radiation detector systems. This chapter introduces the basic principles and their implementation. Topics include signal acquisition, electronic noise, pulse shaping (analog and digital), and data readout techniques.
Date: December 19, 2006
Creator: Grupen, Claus & Shwartz, Boris A.
Partner: UNT Libraries Government Documents Department
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Job Opportunities and Employment Requirements for a Person Entering the Field of Electronics as a Technician in the Dallas Metropolitan Area

Description: The problem involved in this study was twofold. The first was to ascertain what the employment requirements were for a person seeking employment in the field 6f electronics as a technician in the Dallas Metropolitan Area. The second was to determine what the job opportunities were for those individuals.
Date: January 1965
Creator: Abney, Horace Ray
Partner: UNT Libraries
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First high-temperature electronics products survey 2005.

Description: On April 4-5, 2005, a High-Temperature Electronics Products Workshop was held. This workshop engaged a number of governmental and private industry organizations sharing a common interest in the development of commercially available, high-temperature electronics. One of the outcomes of this meeting was an agreement to conduct an industry survey of high-temperature applications. This report covers the basic results of this survey.
Date: April 1, 2006
Creator: Normann, Randy Allen
Partner: UNT Libraries Government Documents Department
open access

Managing Electronic Waste: Issues with Exporting E-Waste

Description: This report looks at issues specifically related to export for recycling of electronic waste (e-waste). Particularly, it discusses documented impacts to human health and the environment that have been tied to unsafe recycling practices in developing countries, as well as issues that have motivated certain stakeholders to divert e-waste from landfill disposal and, hence, increase recycling.
Date: October 7, 2009
Creator: Luther, Linda
Partner: UNT Libraries Government Documents Department

Wals van Kwart voor Middermacht

Description: The "Wal...." is an interactive composition for two computers and flute. Musical information, initially produced by the flutist, is transcribed to midi-code and digital loudness information. On basis of this information, the computers assemble a structural and harmonic environment in which the music is laid. Because the composer chooses the initial musical information, he knows this environment and is able to produce a score. In the composition an attempt is made to produce a balance between the well-defined and the improvised parts. In either way the computer-part is interactive: one computer deals with actions derived from the initial material and the other computer is 'spontaneous' (real-time reflection) throughout the piece. The latter is able to recognize melodic patterns, rhythms, trills, tremolos, etc.. Each computer commands a FB-01 FM sound generator, a simple but flexible synthesizer. As a whole, we have tried to avoid a technical complicated framework and we kept the system fairly cheap to enhance performance possibility by others than the composers.
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: 1987
Duration: 34 minutes 31 seconds
Creator: Grosfeld, Geurt
Partner: UNT Music Library
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Final Technical Report - 300°C Capable Electronics Platform and Temperature Sensor System For Enhanced Geothermal Systems

Description: A silicon carbide (SiC) based electronic temperature sensor prototype has been demonstrated to operate at 300°C. We showed continuous operation of 1,000 hours with SiC operational amplifier and surface mounted discreet resistors and capacitors on a ceramic circuit board. This feasibility demonstration is a major milestone in the development of high temperature electronics in general and high temperature geothermal exploration and well management tools in particular. SiC technology offers technical advantages that are not found in competing technologies such as silicon-on-insulator (SOI) at high temperatures of 200°C to 300°C and beyond. The SiC integrated circuits and packaging methods can be used in new product introduction by GE Oil and Gas for high temperature down-hole tools. The existing SiC fabrication facility at GE is sufficient to support the quantities currently demanded by the marketplace, and there are other entities in the United States and other countries capable of ramping up SiC technology manufacturing. The ceramic circuit boards are different from traditional organic-based electronics circuit boards, but the fabrication process is compatible with existing ceramic substrate manufacturing. This project has brought high temperature electronics forward, and brings us closer to commercializing tools that will enable and reduce the cost of enhanced geothermal technology to benefit the public in terms of providing clean renewable energy at lower costs.
Date: November 30, 2012
Creator: Chen, Cheng-Po; Shaddock, David; Sandvik, Peter; Saia, Rich; Amita Patil, Alexey Vert & Zhang, Tan
Partner: UNT Libraries Government Documents Department

Incantations and Dances

Description: Incantations and Dances was written during the summer and winter of 1989-90, largely at the Virginia Center for the Creative Arts, the Ragdale Foundation and the Electronic Music Studio of Sweet Briar College. The work was premiered in March of 1990 by the contrabassist Salvatore Macchia, for whom the work was written, and the keyboardist Jeffrey Holmes. The work is a study in real-time interaction between, on the one hand, a pair of live performers, one of whom is playing a conventional acoustic instrument and the other a series of electronic keyboards, and, on the other, a pre-programmed computer partially controlled by one of the live performers. The melodic and harmonic material of the piece is serially derived, as is its formal manipulation, but there are improvisatory elements involved and there is a decided jazz inflection to much of the rhythmic material, particularly in the closing dance.
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: 1990
Duration: 10 minutes 58 seconds
Creator: Bestor, Charles
Partner: UNT Music Library

Flood Gate

Description: The computer tries to make sense of what the violin and piano are playing. The humans play from a score or improvise within some notated constraints derived from the other material in the composition. In either case, the computer characterizes the music it is hearing and uses that information to generate a musical response. There are no sequences in the computer part : the only stored musical gestures are the frequently recurring chord sounds and the timbral combinations used for different parts of the piece. Everything else the computer plays is either the transformation of material coming from the human performers, or the output of some real-time compositional algorithms. The improvisational nature of some of the human performance, coupled with the transformational nature of the computer part, ensures that each performance of "Flood Gate" is different, but within a clearly recognizable range of related outcomes. To coordinate with the human players, the computer is also listening for cues which permit it to orient itself in the score. In concert, the computer progresses through sixty-one changes in state (the kinds of transformations it is making, the sound used, etc....), in exact coordination with the other players without any external reference beyond the music played by its human partners. In keeping with the spirit of the composition, the recording presented here was made live in concert ; no subsequent editing or processing was performed.
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: 1989
Duration: 10 minutes 49 seconds
Creator: Rowe, Robert, 1954-
Partner: UNT Music Library
open access

Hanford Controlled Potential Coulometer

Description: Report describing the Hanford Laboratory controlled potential coulometer. This includes the theory behind the coulometer, details of its circuitry, and performance tests. Appendix begins on page 23.
Date: July 11, 1960
Creator: Connally, R. E. & Scott, F. A.
Partner: UNT Libraries Government Documents Department
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Universal Converter Using SiC

Description: The grantee designed a high power (over 1MW) inverter for use in renewable and distributed energy systems, such as PV cells, fuel cells, variable speed wind turbines, micro turbines, variable speed gensets and various energy storage methods. The inverter uses 10,000V SiC power devices which enable the use of a straight-forward topology for medium voltage (4,160VAC) without the need to cascade devices or topologies as is done in all commercial, 4,160VAC inverters today. The use of medium voltage reduces the current by nearly an order of magnitude in all current carrying components of the energy system, thus reducing size and cost. The use of SiC not only enables medium voltage, but also the use of higher temperatures and switching frequencies, further reducing size and cost. In this project, the grantee addressed several technical issues that stand in the way of success. The two primary issues addressed are the determination of real heat losses in candidate SiC devices at elevated temperature and the development of high temperature packaging for SiC devices.
Date: January 1, 2007
Creator: Marckx, Dallas; Ratliff, Brian; Jain, Amit & Jones, Matthew
Partner: UNT Libraries Government Documents Department
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Solid-State Fault Current Limiter Development : Design and Testing Update of a 15kV SSCL Power Stack

Description: ABSTRACT The Solid-State Fault Current Limiter (SSCL) is a promising technology that can be applied to utility power delivery systems to address the problem of increasing fault currents associated with load growth. As demand continues to grow, more power is added to utility system either by increasing generator capacity or by adding distributed generators, resulting in higher available fault currents, often beyond the capabilities of the present infrastructure. The SSCL is power-electronics based equipment designed to work with the present utility system to address this problem. The SSCL monitors the line current and dynamically inserts additional impedance into the line in the event of a fault being detected. The SSCL is based on a modular design and can be configured for 5kV through 69kV systems at nominal current ratings of 1000A to 4000A. Results and Findings This report provides the final test results on the development of 15kV class SSCL single phase power stack. The scope of work included the design of the modular standard building block sub-assemblies, the design and manufacture of the power stack and the testing of the power stack for the key functional tests of continuous current capability and fault current limiting action. Challenges and Objectives Solid-State Current Limiter technology impacts a wide spectrum of utility engineering and operating personnel. It addresses the problems associated with load growth both at Transmission and Distribution class networks. The design concept is pioneering in terms of developing the most efficient and compact power electronics equipment for utility use. The initial test results of the standard building blocks are promising. The independent laboratory tests of the power stack are promising. However the complete 3 phase system needs rigorous testing for performance and reliability. Applications, Values, and Use The SSCL is an intelligent power-electronics device which is modular in design and …
Date: April 30, 2012
Creator: Adapa, Dr. Ram & Piccone, Mr. Dante
Partner: UNT Libraries Government Documents Department
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Sensitivity of Solder Joint Fatigue to Sources of Variation in Advanced Vehicular Power Electronics Cooling

Description: This paper demonstrates a methodology for taking variation into account in thermal and fatigue analyses of the die attach for an inverter of an electric traction drive vehicle. This method can be used to understand how variation and mission profile affect parameters of interest in a design. Three parameters are varied to represent manufacturing, material, and loading variation: solder joint voiding, aluminum nitride substrate thermal conductivity, and heat generation at the integrated gate bipolar transistor. The influence of these parameters on temperature and solder fatigue life is presented. The heat generation loading variation shows the largest influence on the results for the assumptions used in this problem setup.
Date: June 1, 2010
Creator: Vlahinos, A. & O'Keefe, M.
Partner: UNT Libraries Government Documents Department
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The integration of cryogenic cooling systems with superconducting electronic systems

Description: The need for cryogenic cooling has been critical issue that has kept superconducting electronic devices from reaching the market place. Even though the performance of the superconducting circuit is superior to silicon electronics, the requirement for cryogenic cooling has put the superconducting devices at a disadvantage. This report will talk about the various methods for refrigerating superconducting devices. Cryocooler types will be compared for vibration, efficiency, and cost. Some solutions to specific problems of integrating cryocoolers to superconducting devices are presented.
Date: July 1, 2003
Creator: Green, Michael A.
Partner: UNT Libraries Government Documents Department
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Reduced-volume antennas with integrated high-impedance electromagnetic surfaces.

Description: Several antennas with integrated high-impedance surfaces are presented. The high-impedance surface is implemented as a composite right/left-handed (CRLH) metamaterial fabricated from a periodic structure characterized by a substrate, filled with an array of vertical vias and capped by capacitive patches. Omnidirectional antennas placed in close proximity to the high-impedance surface radiate hemispherically with an increase in boresight far-field pattern gain of up to 10 dB and a front-to-back ratio as high as 13 dB at 2.45 GHz. Several TEM rectangular horn antennas are realized by replacing conductor walls with high-impedance surfaces. The TEM horn antennas are capable of operating below the TE{sub 1,0} cutoff frequency of a standard all-metal horn antenna, enabling a reduction in antenna volume. Above the cutoff frequency the TEM horn antennas function similarly to standard rectangular horn antennas.
Date: November 1, 2006
Creator: Forman, Michael A.
Partner: UNT Libraries Government Documents Department
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Final Report. DOE Computational Nanoscience Project DE-FG02-03ER46096: Integrated Multiscale Modeling of Molecular Computing Devices

Description: The document is the final report of the DOE Computational Nanoscience Project DE-FG02-03ER46096: Integrated Multiscale Modeling of Molecular Computing Devices. It included references to 62 publications that were supported by the grant.
Date: November 15, 2009
Creator: Cummings, Peter
Partner: UNT Libraries Government Documents Department
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