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Preliminary design of a cryogenic thermoelectric generator.

Description: A cryogenic thermoelectric generator is proposed to increase the efficiency of a vehicle propulsion system that uses liquid nitrogen as its fuel. The proposed design captures some of the heat required for vaporizing or initial heating of the liquid nitrogen to produce electricity. The thermoelectric generator uses pressurized liquid nitrogen as its cold reservoir and ambient air as the high-temperature reservoir to generate power. This study concentrated on the selection of thermoelectric mater… more
Date: May 2007
Creator: Sivapurapu, Sai Vinay Kumar
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Green Improvements: A Consumer's Guide to Environmentally and Economically Responsible Home Repairs and Improvements for the North Central Texas Region

Description: The Consumer's Guide is designed to help consumers by providing guidelines for the purchase of specific energy-efficient household appliances- water heaters, air conditioning and heating systems, windows, dishwashers, refrigerators, clothes washers, and dryers. This serves two major purposes: to decrease the environmental impact of those products and to save consumers money over the lifetime of the products. The seven major appliances covered in this work are things that consumers tend to purch… more
Date: August 2004
Creator: Dickason, Deborah
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Improving Photovoltaic Panel Efficiency by Cooling Water Circulation

Description: This thesis aims to increase photovoltaic (PV) panel power efficiency by employing a cooling system based on water circulation, which represents an improved version of water flow based active cooling systems. Theoretical calculations involved finding the heat produced by the PV panel and the circulation water flow required to remove this heat. A data logger and a cooling system for a test panel of 20W was designed and employed to study the relationship between the PV panel surface temperature a… more
Date: December 2018
Creator: Joseph, Jyothis
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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The Chief Security Officer Problem

Description: The Chief Security Officer Problem (CSO) consists of a CSO, a group of agents trying to communicate with the CSO and a group of eavesdroppers trying to listen to the conversations between the CSO and its agents. Through Lemmas and Theorems, several Information Theoretic questions are answered.
Date: December 2018
Creator: Tanga, Vikas Reddy
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Irrigation Methods and Their Effects on Irrigation Water Efficiency in High Tunnels

Description: Improving water efficiency is and will continue to be a top concern to meet the world food production demands for a growing population. By having a clear understanding of water efficiencies, communities will be able to address these concerns from an economic standpoint and use more productive methods to grow food and limit water consumption. This study examines the water efficiencies of three irrigation methods over a single growing season in southeastern Oklahoma. Two crops, tomatoes and cucum… more
Date: December 2019
Creator: Young, Lauren
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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A Comparative Evaluation of Matrix Training Arrangements

Description: A common goal of instructional techniques is to teach skills effectively and efficiently. Matrix training techniques are both effective and efficient as they allow for the emergence of untrained responding to novel stimulus arrangements, a phenomenon known as recombinative generalization. However, it is unclear which type of matrix arrangement best promotes recombinative generalization. The current study compared two common matrix training approaches, an overlapping (OV) design and a non-overla… more
Date: May 2017
Creator: Cliett, Terra N.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Economic Efficiency of Personal Air Transportation as a Technological Factor in the United States

Description: The purpose of this study is to examine the factors of economic efficiency embodied in the modern personal airplane and its related services in the United States, with a view to ascertaining the significance of such transportation as a technological factor in the American national economy.
Date: 1950
Creator: Brooks, Jerry R.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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What Relationship Exists Between the Populations of Church Congregations and Their Maximum Efficiency?

Description: The present study was calculated to determine whether or not a congregation with a good percentage increase in membership from a specific date in 1956 to a corresponding date in 1957 would also experience any percentage increase in attendance of members and visitors at the Sunday morning worship services. Likewise, would such a congregation have a large percentage of its assembly in attendance at its Bible classes and at its midweek services?
Date: 1957
Creator: Burton, Jimmy Grey
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

The Role of Knowledge and Attitude in Residential Irrigation Efficiency

Description: Residential irrigation efficiency is a long-term concern for any community that faces water supply stress. When ability to raise water prices is constrained, public education and conservation programs can produce reduced water usage. Understanding the factors behind residential irrigation efficiency allows the design of more effective conservation campaigns. Combining site-specific water budgets with usage data for four hundred homes in North Texas enables quantifying efficient irrigation behav… more
Date: August 2012
Creator: Nickerson, Joel
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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The Federal Independent Regulatory Commissions: Some Recent Criticisms and Recommendations

Description: It is the purpose of this thesis to point out areas of failure and weaknesses in the Federal independent regulatory commissions, and recommendations for improvement, as seen by Louis J. Hector, James M. Landis, Emmette S. Redford, Bernard Schwartz and the Special Subcommittee on Legislative Oversight. A secondary purpose of the study is to present action taken by Congress and President Kennedy in response to recent criticisms of the commissions. The scope of the thesis is limited to the major p… more
Date: August 1964
Creator: Marsh, Fred L.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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The Effect of Rapid Weight Loss on the Efficiency of Wrestlers Under Simulated Competitive Conditions

Description: The purpose of this study was to determine the effects of rapid weight loss on wrestlers' efficiency incorporating competitive aspects of the sport into the research procedures. Six subjects were selected from the North Texas State University Wrestling Club. Eight cardiovascular and neuromuscular measurements were taken and recorded before treatment and following treatment. Astrand's bicycle ergometer test was utilized to obtain exhaustive, heart rates. Data were analyzed by a one-tailed t test… more
Date: December 1977
Creator: Fabrizio, Anthony N.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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A Study of Power Generation From a Low-cost Hydrokinetic Energy System

Description: The kinetic energy in river streams, tidal currents, or other artificial water channels has been used as a feasible source of renewable power through different conversion systems. Thus, hydrokinetic energy conversion systems are attracting worldwide interest as another form of distributed alternative energy. Because these systems are still in early stages of development, the basic approaches need significant research. The main challenges are not only to have efficient systems, but also to conve… more
Date: August 2013
Creator: Davila Vilchis, Juana Mariel
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

An Experimental Study of the Electrodeposition of Lead

Description: This thesis aimed to study some of the general principles underlying electrodeposition together with experimental facts regarding the effects of changing constituents of the plating solutions, variations in hydrogen-ion concentrations, and variation in current density used in the electrodeposition of lead.
Date: June 1937
Creator: Roberts, Ira Clifford
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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