An innovative project and design oriented electrical engineering curriculum at the University of North Texas

An innovative project and design oriented electrical engineering curriculum at the University of North Texas

Date: Summer 2011
Creator: Garcia, Oscar N.; Varanasi, Murali R.; Acevedo, Miguel F. & Guturu, Parthasarathy
Description: Article discussing an innovative project and design oriented electrical engineering curriculum at the University of North Texas.
Contributing Partner: UNT College of Engineering
Back Contact Effects on the Electro-Optical Properties of CdTe/CdS Solar Cells

Back Contact Effects on the Electro-Optical Properties of CdTe/CdS Solar Cells

Date: October 15, 1998
Creator: Levi, D. H.; Albin, D. S.; Gessert, T. A. (National Renewable Energy Laboratory) & Woods, L. M. (Department of Electrical Engineering, Colorado State University, Ft. Collins, CO)
Description: Studies of junction photoluminescence (PL) in CdTe/CdS solar cells reveal that back-contact application produces a dramatic qualitative change in the junction picosecond-PL spectrum. Prior to contact application, the spectrum has two peaks at energies of 1.501 eV and 1.457 eV, corresponding to recombination in regions of CdTeS alloy with 2% and 12% sulfur content, respectively. After contact application, the spectrum consists of a single broad peak at 1.48 eV. Previous studies have shown that the nitric-phosphoric (NP) etch used in the contact procedure produces a layer of elemental tellurium (Te) on the CdTe surface. We postulate that the change in the near-junction PL spectrum is caused by a grain-boundary field effect due to perturbations of the grain-boundary conductivity and Fermi level.
Contributing Partner: UNT Libraries Government Documents Department
Safety Rules for the Installation and Maintenance of Electric Supply and Communication Lines: Comprising Part 2 and the Grounding Rules of the Fifth Edition, National Electrical Safety Code

Safety Rules for the Installation and Maintenance of Electric Supply and Communication Lines: Comprising Part 2 and the Grounding Rules of the Fifth Edition, National Electrical Safety Code

Date: September 23, 1941
Creator: unknown
Description: A report on the safety rules for the installation and maintenance of electric supply and communication lines.
Contributing Partner: UNT Libraries Government Documents Department
Investigation of the Operating Properties of the Leakage Current Anemometer

Investigation of the Operating Properties of the Leakage Current Anemometer

Date: October 1, 1947
Creator: Fucks, Wilhelm
Description: Freedom from inertia, erosion of electrodes, and reaction make the leakage current particularly appropriate for the measurement of flow velocities in gases. Apparatus previously described has now been improved by reducing the size of the electrodes by one -thousandth, as is necessary aerodynamically, and by increasing the magnitude of the current from 1000 to 10,000 times; the latter result was obtained.by use of mercury high-pressure lamps set up at the one focal point of an ellipsoidal reflector with the cathodes arranged at the other focal point or by use of suitable X-ray radiation. Families of calibration curves were taken with a number of vivid tests conditions of the greatest variety and the operating properties of the instrument were widely elucidated by calculation of the sensitivity to fluctuation; this was done at first for operation at stationary conditions only; due to the freedom from inertia the instationary conditions were thus also given. Accordingly, the leakage current anemometer ought to be appropriate for investigations of turbulence,.
Contributing Partner: UNT Libraries Government Documents Department
Piezoelectric Instruments of High Natural Frequency Vibration Characteristics and Protection Against Interference by Mass Forces

Piezoelectric Instruments of High Natural Frequency Vibration Characteristics and Protection Against Interference by Mass Forces

Date: February 1, 1943
Creator: Gohlka, Werner
Description: The exploration of the processes accompanying engine combustion demands quick-responding pressure-recording instruments, among which the piezoelectric type has found widespread use because of its especially propitious properties as vibration-recording instruments for high frequencies. Lacking appropriate test methods, the potential errors of piezoelectric recorders in dynamic measurements could only be estimated up to now. In the present report a test method is described by means of which the resonance curves of the piezoelectric pickup can be determined; hence an instrumental appraisal of the vibration characteristics of piezoelectric recorders is obtainable.
Contributing Partner: UNT Libraries Government Documents Department
Determination of the Actual Contact Surface of a Brush Contact

Determination of the Actual Contact Surface of a Brush Contact

Date: August 1, 1944
Creator: Holm, Ragnar
Description: The number of partial contact surfaces of a brush-ring contact is measured by means of a statistical method. The particular brush is fitted with wicks - that is, insulated and cemented cylinders of brush material, terminating in the brush surface. The number of partial contact surfaces can be computed from the length of the rest periods in which such wicks remain without current. Resistance measurements enable the determination of the size of the contact surfaces. The pressure in the actual contact surface of a recently bedded brush is found to be not much lower than the Brinell hardness of the brush.
Contributing Partner: UNT Libraries Government Documents Department
A 018μm Cmos Transmitter for Ecg Signals

A 018μm Cmos Transmitter for Ecg Signals

Date: December 2013
Creator: Kakarna, Tejaswi
Description: Electrocardiography (ECG) signal transmitter is the device used to transmit the electrical signals of the heart to the remote machine. These electrical signals are ECG signals caused due to electrical activities in the heart. ECG signals have very low amplitude and frequency; hence amplification of the signals is needed to strengthen the signal. Conversion of the amplified signal into digital information and transmitting that information without losing any data is the key. This information is further used in monitoring the heart.
Contributing Partner: UNT Libraries
Advanced Processing of CdTe- and CuInxGa1-xSe2-Based Solar Cells: Final Report: 18 April 1995 - 31 May 1998

Advanced Processing of CdTe- and CuInxGa1-xSe2-Based Solar Cells: Final Report: 18 April 1995 - 31 May 1998

Date: January 13, 1999
Creator: Morel, D. L.; Ferekides, C. S.; Bhatt, R.; Jayapalan, A.; Komin, V.; Lin, H. et al.
Description: This report summarizes work performed by the University of South Florida Department of Electrical Engineering under this subcontract. The Cadmium telluride(CdTe) portion of this project deals with the development of high-efficiency thin-filmed CdTe solar cells using fabrication techniques that are suitable for manufacturing environments.
Contributing Partner: UNT Libraries Government Documents Department
The Fundamental Basis for the Standardization of Electrical Instruments and Meters

The Fundamental Basis for the Standardization of Electrical Instruments and Meters

Date: May 7, 1948
Creator: Silsbee, Francis B.
Description: Description of the standards used by the electrical power industry for the measurement of the electrical quantities.
Contributing Partner: UNT Libraries Government Documents Department
Executive Correspondence – Letter dtd 08/02/05 to the Commission from UCLA Professor of Electrical Engineering Tatsuoh Itoh

Executive Correspondence – Letter dtd 08/02/05 to the Commission from UCLA Professor of Electrical Engineering Tatsuoh Itoh

Date: August 11, 2005
Creator: unknown
Description: Executive Correspondence – Letter dtd 08/02/05 to the Commission from UCLA Professor of Electrical Engineering Tatsuoh Itoh criticizing DoD’s recommendation to move the Army Research Office (ARO) from North Carolina to Bethesda, MD and explaining how such a move would severely compromise ARO’s ability to provide revolutionary advances to the Army.
Contributing Partner: UNT Libraries Government Documents Department
National Electrical Safety Code, 4th edition

National Electrical Safety Code, 4th edition

Date: 1927
Creator: unknown
Description: Fourth edition of the United States Electrical Safety Code.
Contributing Partner: UNT Libraries Government Documents Department
Discussion of the National Electrical Safety Code: (to Accompany the Third Edition of the Code), October 31, 1920

Discussion of the National Electrical Safety Code: (to Accompany the Third Edition of the Code), October 31, 1920

Date: 1921
Creator: unknown
Description: Discussion of the updated rules in the third edition of the National Electrical Safety Code.
Contributing Partner: UNT Libraries Government Documents Department
National electrical safety code: grounding rules and parts 1, 2, 3, 4, and 5

National electrical safety code: grounding rules and parts 1, 2, 3, 4, and 5

Date: March 1948
Creator: unknown
Description: A report on the national electrical safety code.
Contributing Partner: UNT Libraries Government Documents Department
Executive Correspondence – Letter received 08/08/05 by the BRAC Commission from Princeton University Professor of Electrical Engineering Daniel C. Tsui

Executive Correspondence – Letter received 08/08/05 by the BRAC Commission from Princeton University Professor of Electrical Engineering Daniel C. Tsui

Date: August 11, 2005
Creator: unknown
Description: Executive Correspondence – Letter received 08/08/05 by the BRAC Commission from Princeton University Professor of Electrical Engineering Daniel C. Tsui criticizing DoD’s recommendation to move the Army Research Office (ARO) from North Carolina to Bethesda, MD and explaining how such a move would severely compromise ARO’s ability to provide revolutionary advances to the Army.
Contributing Partner: UNT Libraries Government Documents Department
Safety Rules for the Installation and Maintenance of Electrical Supply and Communication Lines

Safety Rules for the Installation and Maintenance of Electrical Supply and Communication Lines

Date: April 15, 1927
Creator: United States. Bureau of Standards.
Description: Report containing information regarding "the construction and maintenance of overhead and underground electrical supply and communication lines" (p. ii).
Contributing Partner: UNT Libraries Government Documents Department
Needs, opportunities, and options for large scale systems research

Needs, opportunities, and options for large scale systems research

Date: October 1, 1984
Creator: Thompson, G.L.
Description: The Office of Energy Research was recently asked to perform a study of Large Scale Systems in order to facilitate the development of a true large systems theory. It was decided to ask experts in the fields of electrical engineering, chemical engineering and manufacturing/operations research for their ideas concerning large scale systems research. The author was asked to distribute a questionnaire among these experts to find out their opinions concerning recent accomplishments and future research directions in large scale systems research. He was also requested to convene a conference which included three experts in each area as panel members to discuss the general area of large scale systems research. The conference was held on March 26--27, 1984 in Pittsburgh with nine panel members, and 15 other attendees. The present report is a summary of the ideas presented and the recommendations proposed by the attendees.
Contributing Partner: UNT Libraries Government Documents Department
Engineering process instructions and development summary MC3642 thermal battery

Engineering process instructions and development summary MC3642 thermal battery

Date: June 1, 1981
Creator: Jacobs, D.
Description: The MC3642 is a dual channel thermal battery used on the DE1010/W85 Command Disable Controller. It utilizes the CalCaCrO{sub 4} electrochemical system. The electrical requirements of this battery are as follows: RISE TIME PEAK VOLTAGE ACTIVE LIFE LOAD Channel 1 - 1.0 Sec. Max. 34 Volts 10 Sec. Min. 40.0 Ohms to 20 Volts above 20 Volts Channel 2 - .350 Sec. Max. 42 Volts 10 MSec. Min. 6.5 Ohms to 23 Volts above 23 Volts The battery consists of 14 cells connected in series (Channel 2) and 12 cells connected in series (Channel 1). Each cell is composed of an anode fabricated from a bimetallic sheet (0.005{double_prime} thick calcium on 0.005{double_prime} thick iron substrate), a depolarizer-electrolyte-binder (DEB) pellet and a heat pellet. Activation is achieved by mechanical primer. Optimum battery performance is achieved with a 35155/10 DEB pellet weighing .80g and a heat pellet, weighing 1.30 grams, of 88/12 heat powder.
Contributing Partner: UNT Libraries Government Documents Department
Practical Robust MIMO OFDM Communication System for High-Speed Mobile Communication

Practical Robust MIMO OFDM Communication System for High-Speed Mobile Communication

Date: May 2015
Creator: Grabner, Mitchell John James
Description: This thesis presents the design of a communication system (PRCS) which improves on all aspects of the current state of the art 4G communication system Long Term Evolution (LTE) including peak to average power ratio (PAPR), data reliability, spectral efficiency and complexity using the most recent state of the art research in the field combined with novel implementations. This research is relevant and important to the field of electrical and communication engineering because it provides benefits to consumers in the form of more reliable data with higher speeds as well as a reduced burden on hardware original equipment manufacturers (OEMs). The results presented herein show up to a 3 dB reduction in PAPR, less than 10-5 bit errors at 7.5 dB signal to noise ratio (SNR) using 4QAM, up to 3 times increased throughput in the uplink mode and 10 times reduced channel coding complexity.
Contributing Partner: UNT Libraries
Bending Moment Due to Wind Pressure on Pole Chart 2A

Bending Moment Due to Wind Pressure on Pole Chart 2A

Date: August 7, 1944
Creator: United States. National Bureau of Standards.
Description: Chart showing bending moment due to wind pressure on poles for various pole heights, circumferences, and loading. It is enlarged from figures in NBS discussion of national electrical safety code (handbook H39).
Contributing Partner: UNT Libraries Government Documents Department
Catenary Chart 3

Catenary Chart 3

Date: August 7, 1944
Creator: United States. National Bureau of Standards.
Description: Chart of catenary curve ordinates: "The curve gives approximate values of sag at all points on the catenary curve expressed in per cent of the center sag. The error is negligible for all spans in which the center sag is less than 10% of the span length." It is enlarged from figures in NBS discussion of national electrical safety code (handbook H39).
Contributing Partner: UNT Libraries Government Documents Department
[Charts for Various Aspects of Poles]

[Charts for Various Aspects of Poles]

Date: August 7, 1944
Creator: United States. National Bureau of Standards.
Description: Chart 1A-1B. Conductor loading nomograph, Chart 2A. Bending moment due to wind pressure on pole, Chart 2B. Ultimate resisting moments of wood poles, Chart 3. Catenary curve.
Contributing Partner: UNT Libraries Government Documents Department
Conductor Loading Nomograph Chart 1B

Conductor Loading Nomograph Chart 1B

Date: August 7, 1944
Creator: United States. National Bureau of Standards.
Description: Chart related to conductor loading showing vertical, transverse and conductor loads in pounds per linear feet of conductor. It is enlarged from figures in NBS discussion of national electrical safety code (handbook H39).
Contributing Partner: UNT Libraries Government Documents Department
Ultimate Resisting Moments of Wood Poles Chart 2B

Ultimate Resisting Moments of Wood Poles Chart 2B

Date: August 7, 1944
Creator: United States. National Bureau of Standards.
Description: Chart showing the ultimate resisting moments of wood poles based on the circumferences at ground line for different kinds of woods. It is enlarged from figures in NBS discussion of national electrical safety code (handbook H39).
Contributing Partner: UNT Libraries Government Documents Department
Transformer design considerations for non-continuous mode, boost, flyback converters

Transformer design considerations for non-continuous mode, boost, flyback converters

Date: July 1, 1995
Creator: Nagel, R.
Description: This paper presents some design considerations for small, flyback transformers used to charge energy storage capacitors to 0.1 to 5 KV from a low voltage DC source.
Contributing Partner: UNT Libraries Government Documents Department
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