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228 Matching Results
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Field Validation of Zero Energy Lab Water-to-Water Ground Coupled Heat Pump Model
Heat pumps are a vital part of each building for their role in keeping the space conditioned for the occupant. This study focuses on developing a model for the ground-source heat pump at the Zero Energy lab at the University of North Texas, and finding the minimum data required for generating the model. The literature includes many models with different approaches to determine the performance of the heat pump. Each method has its pros and cons. In this research the equation-fit method was used to generate a model based on the data collected from the field. Two experiments were conducted for the cooling mode: the first one at the beginning of the season and the second one at the peak of the season to cover all the operation conditions. The same procedure was followed for the heating mode. The models generated based on the collected data were validated against the experiment data. The error of the models was within ±10%. The study showed that the error could be reduced by 20% to 42% when using the field data to generate the model instead of the manufacturer’s catalog data. Also it was found that the minimum period to generate the cooling …
Date:
May 2016
Creator:
Abdulameer, Saif
System:
The UNT Digital Library
A Proposed Industrial Arts General Shop Curriculum for Pauline G. Hughes Middle School, Burleson Independent School District
This study was made to gather data and information to aid the Burleson Independent School District in initiating an industrial arts general shop program in the Pauline G. Hughes Middle School. The data and information were obtained from the Texas Education Agency, the Burleson Independent School District records, the vocational director, the assistant superintendent, a questionnaire, and the Brodhead-Garrett 1976-1977 Catalog. The majority of the general shop programs in the north Texas area conduct classes five days a week for fifty-five minutes a day and accommodate twenty-four students per class. Furthermore, the majority of the general shop programs offer three units of instruction per year and teach one unit of instruction each quarter.
Date:
May 1978
Creator:
Adams, William Leroy.
System:
The UNT Digital Library
Ozone Pollution of Shale Gas Activities in North Texas
The effect of shale gas activities on ground-level ozone pollution in the Dallas-Fort Worth area is studied in detail here. Ozone is a highly reactive species with harmful effects on human and environment. Shale gas development, or fracking, involves activities such as hydraulic fracturing, drilling, fluid mixing, and trucks idling that are sources of nitrogen oxides (NOX) and volatile organic compounds (VOC), two of the most important precursors of ozone. In this study two independent approaches have been applied in evaluating the influences on ozone concentrations. In the first approach, the influence of meteorology were removed from ozone time series through the application of Kolmogorov-Zurbenko low-pass filter, logarithmic transformation, and subsequent multi-linear regression. Ozone measurement data were acquired from Texas Commission on Environmental Quality (TCEQ) monitoring stations for 14 years. The comparison between ozone trends in non-shale gas region and shale gas region shows increasing ozone trends at the monitoring stations in close proximity to the Barnett Shale activities. In the second approach, the CAMx photochemical model was used to assess the sensitivity of ozone to the NOX and VOC sources associated with shale oil and gas activities. Brute force method was applied on Barnett Shale and Haynesville Shale emission …
Date:
May 2016
Creator:
Ahmadi, Mahdi
System:
The UNT Digital Library
Analysis and Evaluation of the Role of Public Relations in Leasing Dallas Petroleum Center
The problem in this study was to discover if the public relations program of the Dallas Petroleum Center was useful in leasing and if the program played a significant role in a leasing increase. The study was carried out by describing the development of the building project, by analyzing the planning and execution of the public relations program, by testing the program's effectiveness, and by drawing conclusions about the program and by making recommendations for this specific program and for office leasing in general. The effectiveness of the program was tested by questionnaires and interviews. The public relations program proved to be an effective tool in leasing office space; and a similar program was recommended for other buildings.
Date:
May 1977
Creator:
Ainsworth, Doris Stewart
System:
The UNT Digital Library
The Organizational Improvement of the Village Creek Wastewater Treatment Plant in Fort Worth, Texas, 1969-1988: a Case Study of Forces Responsible for Organizational Change
This study documents that external and internal forces were causes of change at VCWTP. External forces caused. Fort Worth to reorganize and introduce new management at VCWTP after 1982. These improvements led to VCWTP being selected best managed wastewater treatment plant in the nation by EPA in 1988. This study first analyzes external and internal forces responsible for changes at VCWTP. A history of plant operations also is reviewed. Personnel interviews were conducted of perceptions of employees. Finally, statistics obtained of the plant operation from 1969 to 1988 are compared with personal interviews. Five forces effect change at VCWTP; population, regulatory requirements, political conflicts, an organizational and managerial factors. Turnaround occurred as external and internal corrections were made.
Date:
May 1993
Creator:
Akidi, Innocent O. (Innocent Okechuknu)
System:
The UNT Digital Library
Food Habits and Dietary Overlap of Four Species of Rodents from the Mesquite Plains of Texas
The coexistence of Dipodomys ordii and Perognathus hispidus with Peromyscus maniculatus and Reithrodontomys montanus was studied in a grassland association of central Texas. The food habits of these species were compared with information from habitat vegetation analysis in an effort to determine food selectivity and the amount and importance of niche overlap and competition among these rodents.
Date:
May 1972
Creator:
Alcoze, Thomas M.
System:
The UNT Digital Library
"Miss Kathy"
Miss Kathy is a documentary film that tells the story of Kathy Griffin-Grinan, a lead recovery coach for prostitution and human trafficking with the Harris County Sheriff’s Office. Her non-profit organization —We’ve Been There, Done That – works in conjunction with law-enforcement to offer the survivors of prostitution a chance at rehabilitation. With endless enthusiasm, she mentors survivors as they struggle to escape a destructive lifestyle. This film also explores the relationship between human trafficking and prostitution, while addressing issues of victimization and exploitation.
Date:
May 2015
Creator:
Alexander, Jeffrey, 1982-
System:
The UNT Digital Library
Hooking Mortality of Largemouth Bass Caught on Controversial Artificial Lures and Live Bait : Lake Ray Roberts, Texas
A total of 192 largemouth bass were caught at Lake Ray Roberts, Texas (1995) to investigate five controversial bass angling techniques relative to hooking mortality. The bait types were Texas-rigged scented and non-scented plastic worms, Carolina-rigged scented and non-scented plastic worms, and live golden shiners. Overall hooking mortality was 21.87% and mortality was dependent upon bait type. Highest mortality resulted from the Texas-rigged scented lures, while the lowest mortality was generated by live golden shiners. A creel survey indicated that few anglers were having success with the investigated baits. Factors that had a confirmed effect on hooking mortality were hooking location and water temperature. Hooking mortality was not excessive compared to other similar studies.
Date:
May 1996
Creator:
Alumbaugh, Andrew E. (Andrew Edward)
System:
The UNT Digital Library
Callibaetis Floridanus (Ephemeroptera: Baetidae) Life History and Production in a West Texas Playa
A life history study of Callibaetis floridanus was conducted over the wet cycle of a playa on the Southern High Plains of Texas from June through September 1995.
Date:
May 1998
Creator:
Anderson, Gregory (Gregory Mark)
System:
The UNT Digital Library
Exoprotease Production by Aeromonas hydrophila in a Chemically Defined Medium
Wretlind, Heden, and Wadstrom found ammonium sulfate to be inhibitory for the formation of extracellular protease in Aeromonas hydrophila grown in Brain Heart Infusion medium. They demonstrated by manipulating the iron and zinc content within their medium that it is possible to differentially affect the accumulation of hemolysin and protease by A. hydrophila grown in batch culture. Further manipulation of the composition of this medium was done in the present study to determine the effect of other components on the production of protease. The purpose of this study was to determine the factors affecting the level of A. hydrophila protease produced in a chemically defined medium.
Date:
May 1985
Creator:
Anderson, Paulette S. (Paulette Sue), 1952-
System:
The UNT Digital Library
The Effects of an Informational Briefing on the Attitudes of Certain High School Seniors in the Dallas-Fort Worth Metropolitan Area Toward the Air Force ROTC Training Program
This study was a simple "before" and "after" attitude measurement experiment using an experimental group and a control group. The attitude measurements were made before and after the subjects in the experimental group were presented an informational briefing about the Air Force ROTC training program. Both the experimental group and the control group were subject to exposure to the Air Force mass communication advertising during the two-month study period. The results indicate that the increased knowledge gained by the experimental group through its exposure to the informational briefing caused a negative change of attitude within the group. However, the control group had no significant change of attitude during the study period even though more than 87 percent of those subjects were exposed to some form of Air Force advertising.
Date:
May 1974
Creator:
Andrews, Robert Glenn
System:
The UNT Digital Library
The Effects of Musical Stimuli on the Gross Motor Activity of Profound Mental Retardates
It was the purpose of this present study to investigate the effects of two types of music, tonic and sedative, on the gross motor activity of profound mental retardates. The primary objective was to determine if therapeutic benefits resulting from the application of music could be extended to profound retardates as has already been demonstrated with other levels of retardation.
Date:
May 1969
Creator:
Angelloz, Robert E.
System:
The UNT Digital Library
Behavior Rehearsal Combined with Anxiety Relief Conditioning : A New Assertion Training Paradigm and Its Relative Efficacy
An experiment was conducted to investigate the relative effectiveness of a combined behavior rehearsal anxiety relief conditioning paradigm with a more conventional behavioral rehearsal program in the treatment of deficient assertive behavior.
Date:
May 1973
Creator:
Arnold, Bill R.
System:
The UNT Digital Library
Evaluation of a Constructed Wetland to Reduce Toxicity from Diazinon at the Pecan Creek Wastewater Treatment Plant, Denton, TX
The City of Denton Pecan Creek Wastewater Treatment Facility has periodically failed effluent toxicity testing. A Toxicity Identification Evaluation has determined that Diazinon in the effluent is contributing to the observed toxicity. Chlorpyrifos is also implicated as a factor. The City of Denton constructed a half acre experimental wetland to remove Diazinon related toxicity. Results from spiking and microcosm experiments indicate that the wetland can reduce the Diazinon.
Date:
May 1996
Creator:
Baerenklau, Amy L. (Amy Lyn)
System:
The UNT Digital Library
Effect of Trampoline Training and Tumbling on the Cardiovascular Efficiency of College Women
The purpose of the study was to determine if subjects would improve in cardiovascular efficiency following a six-week program of trampolining and/or tumbling. Literature concerning cardiovascular efficiency, training, trampoline, testing instruments, test selection and maximal oxygen intake were thoroughly reviewed. The Astrand test of maximal oxygen intake and the Cooper twelve-minute run test of aerobic capacity were found to best fit the needs of the present study.
Date:
May 1972
Creator:
Bateman, Judith L.
System:
The UNT Digital Library
Deep Muscle Relaxation Obtained with Analog Electromyographic Information Feedback
The purpose of the research study was to provide improved relaxation training with the use of an electromyography feedback device based on the design of Green et al. (1969). It was intended that this instrument would allow the training of deep muscle relaxation to the point of neuro-muscular silence, while remaining inexpensive enough to be applied in the clinical setting.
Date:
May 1973
Creator:
Bates, Charles Edward
System:
The UNT Digital Library
Increasing the Social Interaction in a Fifth-Grade Class: a Sociometric Study
The purpose of this study is to change the structure of a fifth-grade class in order to increase the social interaction of the group.
Date:
May 1961
Creator:
Baugh, James Robert
System:
The UNT Digital Library
Evaluating Fish Impingement and Entrainment at the Comanche Peak Steam Electric Station
This study was designed to determine if impingement and entrainment by cooling water intake at the Comanche Peak Steam Electric Station have an adverse impact upon the Squaw Creek Reservoir fish population. The yearly impingement of fish was estimated to be 262,994 of 14 species. The threadfin shad (Dorosoma petenense) accounted for 96% of this total. Entrainment of eggs and larvae for a five month period was estimated to be 15,989,987 and 42,448,794 respectively. Two fish population studies were performed on Squaw Creek Reservoir to help assess impact. It was determined that the losses due to impingement and entrainment have no adverse impact upon the fish population of Squaw Creek Reservoir.
Date:
May 1996
Creator:
Bauml, George A. (George Arthur)
System:
The UNT Digital Library
Lincoln-Douglas Debate in the State of Texas
This study traces the development of Lincoln-Douglas debate in Texas. The history of this type of debate from the Great Debate between Abraham Lincoln and Stephen Douglas to the Reagan-Mondale debates is considered. In addition, the merits of this type of oral controversy are explored. The reasons for the creation of L-D debate and its introduction into the forensic curriculum are discussed. In order to measure L-D's growing acceptance in the debate community, the results of a questionnaire of Texas Forensic Association debate coaches is evaluated. This study found that L-D debate is growing in participation in Texas schools. The distinct features of L-D enable it to be an innovative and challenging form of discourse.
Date:
May 1986
Creator:
Baxter, Laura B. (Laura Beth)
System:
The UNT Digital Library
A Comparative Study of Anxiety between Science and Art Majors
The purpose of this study is to determine the levels of anxiety in college freshmen and seniors from the Departments of Science and Art at North Texas State College by using the Taylor Manifest Anxiety Scale. It is hoped that the findings uncovered by this study will be of help to others interested in investigating and exploring this area.
Date:
May 1960
Creator:
Benningfield, Milo Francis
System:
The UNT Digital Library
The Personality Characteristics of High School Male Gymnasts
The purpose of this study was to examine the relationship between the personality characteristics of high school male gymnasts and the personality characteristics of high school football athletes and non-athletes. An attempt was made to answer three specific questions: I. Do personality differences exist between the gymnastic group and the non-athletic group? II. Do personality differences exist between the gymnastic group and the football group? III. Do personality differences exist between the football group and the non-athletic group?
Date:
May 1972
Creator:
Bennington, Gary L.
System:
The UNT Digital Library
Production and Energy Metabolism in Three Benthic Insect Populations in a Small North Central Texas Pond
Annual energy budgets of dominant benthic macro-invertebrates were examined during November 1973 to October 1974 from the benthos of a small pond ecosystem in north-central Texas. Estimates of annual secondary production (Hynes and Coleman 1968) were Procladius s. (Diptera, Chironimidae), 2.4 g m^-2 y^-1 (13 kcal m^-2 y^-1 ); Tendipes decorus (Diptera, Chironomidae), 6.0 g m^-2 y^-1 (40 kcal m^-2 y^-1 ); Brachycercus sp. (Ephemeroptera, Caenidae), 1.9 g m^-2 y^-1 (11 kcal m^-2 y^-1). Energy metabolism was measured in the laboratory at six seasonally encountered temperatures (5, 10, 15, 20, 25, and 30 C) on an acclimatization basis, and then extrapolated to the field. Estimates of annual energy metabolism are Procladius sp., 5.0 kcal m^-2 y^-1 ; Tendipes decorus, 17.2 kcal m^-2 y^-1 ; Brachycercus sp. 40.0 kcal m^-2 y^-1.
Date:
May 1978
Creator:
Benson, Daniel J.
System:
The UNT Digital Library
Employment Status and Job Satisfaction of Clothing and Textiles Graduates from 1969 to 1978
The purposes of this study were to determine the employment status of North Texas State University clothing and textiles majors who graduated between 1969 and 1978 and to provide a measurement of their job satisfaction. The data were gathered through two mailed questionnaires, a general one developed by the researcher, and the Job Descriptive Index, a standardized job satisfaction index. Graduates in clothing and textiles tended to seek and obtain employment related to their major field of study, and they are generally satisfied with their jobs. Factors tested statistically in this study included age, marital status, parental status, salary, tenure, and organization size. No significant differences in job satisfaction or employment tatus were evident relative to any of these factors.
Date:
May 1980
Creator:
Boak, Pamela
System:
The UNT Digital Library
A Study of the Value of Vocational/Industrial Teacher Preparation for the State Certification at North Texas State University
"The problem with which this study is concerned is that of determining whether the implementation of a teacher-training curriculum providing the courses required for state certification of vocational-technical teachers employed in the North Texas public school systems is feasible and desirable at North Texas State University."--1.
Date:
May 1972
Creator:
Boyd, Herschel B.
System:
The UNT Digital Library