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A Preliminary Controller Design for Drone Carried Directional Communication System
In this thesis, we conduct a preliminary study on the controller design for directional antenna devices carried by drones. The goal of the control system is to ensure the best alignment between two directional antennas so as to enhance the performance of air-to-air communication between the drones. The control system at the current stage relies on the information received from GPS devices. The control system includes two loops: velocity loop and position loop to suppress wind disturbances and to assure the alignment of two directional antennae. The simulation and animation of directional antennae alignment control for two-randomly moving drones was developed using SIMULINK. To facilitate RSSI-based antenna alignment control to be conducted in the future work, a study on initial scanning techniques is also included at the end of this thesis.
Date:
August 2015
Creator:
AL-Emrani, Firas
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Effects of Raising Grandchildren on the Marital Satisfaction, Life Satisfaction, and Parenting Stress of Grandparents
This study examined the relationship among the variables of marital satisfaction, life satisfaction, and parenting stress of grandparents raising grandchildren and whether the sources and levels of marital satisfaction, life satisfaction, and parenting stress differed among grandparents raising grandchildren and grandparents not raising grandchildren.
Date:
August 1992
Creator:
Aaron, Larry M. (Larry Marion)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Health Reform Implementation Analysis: A Guide to Policy Development for Geriatric Care Planning, Integration and Evaluation
In the context of health care delivery for senior citizens, this research utilizes three studies that examine the development and implementation of health policy and the factors that can directly or indirectly impact the effective delivery of health services to senior citizens. It utilizes three essays employing mixed methods (qualitative and quantitative) methods including semi structured interviews, multiple regression and partial least squares structural equation modelling to examine the extent to which the implementation of health services delivered attributes of primary and integrated care to seniors. The two essays identified methods, approaches and strategies of integrated care relevant to the development of policy that can be successfully implemented when the contextual issues that older people consider to be important in maintaining their functional capabilities and their motivation to improve health as perceived by them are addressed. Consequent upon the results from these studies, the third essay examines the methodological issues on integrated geriatric care implementation when guidelines for effective policy development identified were not followed. By highlighting the relationship between effective policy and patient satisfaction, these three essays' recommended approach enhances the theory of health design that confirms that theoretical models of primary care must incorporate the system, process and …
Date:
August 2020
Creator:
Abah, Theresa
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Impact of Computer Instruction on the Near Transfer and Far Transfer of a General Problem Solving Strategy
The purpose of this study was to examine the impact of computer instruction on the near transfer and far transfer of a means-end analysis problem solving strategy.
Date:
August 1992
Creator:
Abbey, Beverly G. (Beverly Gene)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Convergence of Infinite Series
The purpose of this paper is to examine certain questions concerning infinite series. The first chapter introduces several basic definitions and theorems from calculus. In particular, this chapter contains the proofs for various convergence tests for series of real numbers. The second chapter deals primarily with the equivalence of absolute convergence, unconditional convergence, bounded multiplier convergence, and c0 multiplier convergence for series of real numbers. Also included in this chapter is a proof that an unconditionally convergent series may be rearranged so that it converges to any real number desired. The third chapter contains a proof of the Silverman-Toeplitz Theorem together with several applications.
Date:
August 1983
Creator:
Abbott, Catherine Ann
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Operators on Continuous Function Spaces and Weak Precompactness
If T:C(H,X)-->Y is a bounded linear operator then there exists a unique weakly regular finitely additive set function m:-->L(X,Y**) so that T(f) = ∫Hfdm. In this paper, bounded linear operators on C(H,X) are studied in terms the measure given by this representation theorem. The first chapter provides a brief history of representation theorems of these classes of operators. In the second chapter the represenation theorem used in the remainder of the paper is presented. If T is a weakly compact operator on C(H,X) with representing measure m, then m(A) is a weakly compact operator for every Borel set A. Furthermore, m is strongly bounded. Analogous statements may be made for many interesting classes of operators. In chapter III, two classes of operators, weakly precompact and QSP, are studied. Examples are provided to show that if T is weakly precompact (QSP) then m(A) need not be weakly precompact (QSP), for every Borel set A. In addition, it will be shown that weakly precompact and GSP operators need not have strongly bounded representing measures. Sufficient conditions are provided which guarantee that a weakly precompact (QSP) operator has weakly precompact (QSP) values. A sufficient condition for a weakly precomact operator to be strongly …
Date:
August 1988
Creator:
Abbott, Catherine Ann
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An investigation of the relationships between job characteristics, satisfaction, and team commitment as influenced by organization-based self-esteem within a team-based environment
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Use of this item is restricted to the UNT Community
Team-based management is a popular contemporary method of redesigning jobs in order to more effectively utilize the human potential of employees. The use of such management techniques should result in increased satisfaction and team commitment; however, many research studies have failed to demonstrate increases in affective outcomes on the part of the employee. The research question examined in this study is, "What specific job dimensions and situational factors result in higher levels of satisfaction and team commitment?" The Job Characteristics Model (Hackman & Oldham, 1975) provided a basis for this study. The model was designed for individual contributors and has not been extensively used in team research. As expected it was found that within a team-based environment higher levels of the five core job dimensions of skill variety, task identity, task significance, autonomy, and job feedback were associated with increased satisfaction and team commitment. Organization-based self-esteem was found to mediate the relationship between the five core job dimensions and the affective outcome variables. Contrary to expectations, however, it was found that consultative team members experienced higher levels of satisfaction and commitment than substantive team members. In addition, consultative team members reported higher levels of two core job dimensions, skill variety …
Date:
August 2000
Creator:
Abbott, John B.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Stimulus Control Effects of Changes in Schedules of Reinforcement
Sometimes, changes in consequences are accompanied by a clear stimulus change explicitly arranged by the experimenter. Other times when new consequences are in effect, there is little or no accompanying stimulus change explicitly arranged by the experimenter. These differences can be seen in the laboratory as multiple (signaled) schedules and mixed (unsignaled) schedules. The current study used college students and a single-subject design to examine the effects of introducing signaled and unsignaled schedules, and the transitions between them. In one phase, a card was flipped from purple to white every time the schedule was switched from VR-3 to FT-10. In another phase, the schedule still changed periodically, but the card always remained on the purple side. Results showed that the participants' responding was controlled by the schedule of reinforcement, by the color of the card, or both. These results suggest that changes in patterns of reinforcement lead to changes in stimulus control. In addition, the stimulus control for a behavior can come from several different sources. During teaching, it may facilitate the development of stimulus control to change the environment when a new behavior is required.
Date:
August 2020
Creator:
Abdel-Jalil, Awab
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
French Structuralism and its Contribution to Sociological Theory
This study delineates the basic concepts and analytical techniques of contemporary French structuralists, namely Levi-Strauss, Lacan, Barthes, Althusser, and Foucault, and critically examines the contribution of their formulations to sociological theory and the implication of such formulations on the methodological orientation in sociology.
Date:
August 1985
Creator:
Abderrahmane, Azzi
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Social Control in the Newsroom: A Case Study
The problem of this study is to investigate how news policy in the Denton Record-Chronicle is defined and maintained and whether the newspaper staffers tend to conform to or conflict with the newspaper's news policy. The study suggests that the more experienced the staffer, the more likely he will conflict with the newspaper's news policy, and the less experienced the staffer, the more likely he will conform to the newspaper's news policy. Social control is in the hand of the newspaper organization. That is, the newspaper tends to control the mechanisms of social control. However, unless the newspaper recognizes the needs of the staffers' participation in its editorial decision, conflict may continue to be an important factor in the newsroom work-setting.
Date:
August 1982
Creator:
Abderrahmane, Azzi
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Comparative Ultrastructural Study between Young and Adult forms of Trypanosoma Lewisi
The purpose of this study was to examine the ultrastructure of both young (dividing form) and adult (stationary form) of Trypanosoma lewisi. Changes observed between the two forms of the organism were related directly to data obtained from previous comparative biochemical studies conducted on these forms of Trypanosoma lewisi.
Date:
August 1973
Creator:
Abdul-Salam, Jasem M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Evaluation of Texas Home Instruction for Parents of Preschool Youngsters Program on Reading and Math Achievement for Grades K to 8
This study was intended to evaluate the impact of socioeconomically disadvantaged children's participation in the Texas Home Instruction for Parents of Preschool Youngsters (TX HIPPY) Program on their school readiness and academic achievement. The study used a quasi-experimental design and applied full and optimal propensity score matching (PSM) to address the evaluation concern of the impact of the TX HIPPY program on HIPPY participants' academic achievement compared to non-HIPPY participants. This evaluation targeted former HIPPY participants and tracked them in the Dallas ISD database through Grade Levels K-8. Data were obtained by administering Istation's Indicators of Progress (ISIP) for kindergarten, TerraNova/SUPERA for Grades K-2, and State of Texas Assessments of Academic Readiness for math and reading (STAAR) for Grades 3-8. HIPPY and non-HIPPY groups were matched using propensity score analysis procedures. The evaluation findings show that the TX HIPPY program positively influences kindergarten students to start school ready to learn. The findings of math and reading achievements suggest that HIPPY children scored at the same level or higher than non-HIPPY children did on math and reading achievement, indicating that TX HIPPY program has achieved its goal of helping children maintain long-term academic success. However, the evaluation findings also indicated that …
Date:
August 2019
Creator:
Abdulaziz, Noor Amal Saud
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Description and Analysis of the Channels of Distribution for Food Products in the State of Kuwait
This study is intended, first, to describe and analyze the channels of distribution for food products in the State of Kuwait, second, to pinpoint the problems that exist in the food-distribution system, and, third, to make specific recommendations for the alleviation of the problems. Consistent with the objectives of the study and based on the description and analysis of the food-distribution system in the country, it is concluded in the study that Kuwait depends on imports for virtually all of its food; the government plays a major role in the food-distribution system; and the majority of food wholesaling and retailing establishments are small, inefficient, and lack modern marketing and physical distribution techniques. Product shortages and rising food prices plague the food-distribution system in the country. Also, the findings indicate that consumers in Kuwait are generally ignorant and uninformed in the areas of food nutrition and food shopping, and the lack of standardization and grading of food products makes the shopping task of the consumer more difficult.
Date:
August 1977
Creator:
Abdulelah, Abdulla Ali
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Two Argentine Song Sets: A Comparison of Songs by De Rogatis and Ginastera
Latin American classical vocal repertoire is vast, but in the United States, we only hear a fairly limited part of this literature. Much of this repertoire blends western European classical music traditions and native folk music traditions. One example of such a Latin American vocal work that is well-known in the United States is Alberto Ginastera's frequently performed song set from 1943, Cinco canciones populares argentinas. However, another lesser-known, earlier work, Cinco canciones argentinas (1923), by fellow Argentine composer Pascual De Rogatis (1880-1980) deserves attention as well. As with Ginastera's set, De Rogatis' songs are based on Argentine folk genres, but contain stylistic features of European classical music of its time. De Rogatis' neglected songs are a significant, overlooked part of Argentine classical music history, and a full understanding of well-known works such as Ginastera's song set and of the genre as a whole, must include attention to De Rogatis' Cinco canciones argentinas. Beyond vocal repertoire, De Rogatis' songs are an important part of the development of Argentine classical music. While Western musical trends change rapidly, folk music remains largely unchanged. Both De Rogatis and Ginastera were proud of their Argentine heritage, and incorporated traditional music into their compositions. I …
Date:
August 2018
Creator:
Abe, Shoko
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
University-industry Alliances : A Study of Faculty Attitudes Toward the Effects of Alliances on the Governance and Operations of Institutions of Higher Education
The central purpose of this study was to compare the attitudes of faculty in applied sciences to the attitudes of faculty in liberal arts and other selected fields to determine if they differ significantly from each other in their perceptions of the effects of university-industry alliances on campus governance and operations. Secondary purposes were (a) to appraise the debate on alliances and the effects of alliances on academic values and (b) to contribute to the literature concerning alliances and their potential for improving higher education.
Date:
August 1992
Creator:
Abegunde, Olufemi
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Federalism and Political Problems in Nigeria
The purpose of this thesis is to examine and re-evaluate the questions involved in federalism and political problems in Nigeria. The strategy adopted in this study is historical, The study examines past, recent, and current literature on federalism and political problems in Nigeria. Basically, the first two chapters outline the historical background and basis of Nigerian federalism and political problems. Chapters three and four consider the evolution of federalism, political problems, prospects of federalism, self-government, and attainment of complete independence on October 1, 1960. Chapters five and six deal with the activities of many groups, crises, military coups, and civil war. The conclusions and recommendations candidly argue that a decentralized federal system remains the safest way for keeping Nigeria together stably.
Date:
August 1975
Creator:
Abegunrin, Olayiwola
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Jacques-Antoine-Hippolyte, Comte De Guibert: Father of the Grande Armée
Jacques-Antoine-Hippolyte, comte de Guibert (1743-1790) dedicated his life and career to creating a new doctrine for the French army. Little about this doctrine was revolutionary. Indeed, Guibert openly decried the anarchy of popular participation in government and looked askance at the early days of the Revolution. Rather, Guibert’s doctrine marked the culmination of an evolutionary process that commenced decades before his time and reached fruition in the Réglement of 1791, which remained in force until the 1830s. Not content with military reform, Guibert demanded a political and social constitution to match. His reforms required these changes, demanding a disciplined, service-oriented society and a functional, rational government to assist his reformed military. He delved deeply, like no other contemporary writer, into the linkages between society, politics, and the military throughout his career and his writings. Guibert exerted an overwhelming influence on military thought across Europe for the next fifty years. His military theories provided the foundation for military reform during the twilight of the Old Regime. The Revolution, which adopted most of Guibert’s doctrine in 1791, continued his work. A new army and way of war based on Guibert’s reforms emerged to defeat France’s major enemies. In Napoleon’s hands, Guibert’s army …
Date:
August 2014
Creator:
Abel, Jonathan, 1985-
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Factors Affecting Academic Interest and Self Perception of Adolescent Hispanic Females
This investigation identifies deterrents to the educational, social, and cultural success of Latina adolescent females. Across the nation, and especially in states such as Texas and California, the Hispanic population is fast becoming the largest minority in society. Because the adolescent Hispanic population within the United States today will comprise much of America's future economic and social base, identifying and addressing educational, cultural, and social deterrents to their success becomes important not only for personal well-being, but for the well-being of future society as a whole. A second purpose was that of determining the efficacy of group-centered psychoeducational therapy in improving self-esteem and decreasing anxiety and depression symptoms in adolescent female Hispanic high school students. The experimental groups consisted of one group of seven female Hispanic adolescents who received computer and internet training and psychoeducational group counseling twice a week for five weeks. and a second group of five female Hispanic adolescents who received computer and internet training and psychoeducational group counseling twice a week for five weeks. The control group consisted of fourteen female Hispanic students who received no treatments. The Beck Depression Inventory was used to measure pre and post test levels of depression, the Beck Anxiety Inventory …
Date:
August 2007
Creator:
Abel, Karen
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Rorschach Patterns as Related to Sociometric Status
The purpose of this study is to determine the relationship between an individual's performance on the Rorschach Ink Blot Test and his degree of social acceptance as revealed by a test of sociometry.
Date:
August 1955
Creator:
Aber, Walter E.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Forest Landscape Dynamics: a Semi-Markov Modeling Approach
A transition model (MOSAIC) is used to describe forest dynamics at the landscape scale. The model uses a semi-Markov framework by considering transition probabilities and Erlang distributed holding times in each transition. Parameters for the transition model are derived from a gap model (ZELIG). This procedure ensures conceptual consistency of the landscape model with the fine scale ecological detail represented by the forest gap model. Spatial heterogeneity in the transition model is driven by maps of terrain with characteristics contained in a Geographic Information System (GIS) database. The results of the transition model simulations, percent cover forest type maps, are exported to grid-maps in the GIS. These cover type maps can be classified and used to describe forest dynamics using landscape statistics metrics. The linkage model-GIS enhances the transition model spatial analytical capabilities. A parameterization algorithm was developed that takes as input gap model tracer files which contain the percent occupation of each cover type through time. As output, the algorithm produces a file that contains the parameter values needed for MOSAIC for each one of the possible transitions. Parameters for the holding time distribution were found by calculating an empirical estimate of the cumulative probability function and using a …
Date:
August 1997
Creator:
Ablan, Magdiel
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Study of the Relationship Between the Levels of Self-Awareness within Students Enrolled in Counseling Practicum and the Measurements of Their Counseling Effectiveness
Counselor self-awareness is considered an important aspect of counseling effectiveness according to the American Counseling Association and the American Psychological Association and in numerous studies and articles within the counseling literature. With the effort to improve the effectiveness of counseling practicum students comes the need to understand the relationship between effectiveness ratings and the levels of counselor self-awareness. Gestalt Therapy literature, and the development of the Personal Orientation Inventory (Shostrom, 1963) provided the working definition of self-awareness in this study. Research and evaluation are means for improving the correlation between students' characteristics in counselor training programs and their effectiveness as perceived by faculty and doctoral supervisors. The purpose of this study was to determine the effects of practicum students' ages and their levels of self-awareness upon counseling effectiveness as measured by faculty and doctoral supervisors in a university clinic setting. Twenty-nine students who were enrolled in four practicum classes were administered the Personal Orientation Instrument. Four faculty supervisors and eight doctoral supervisors were administered the Counselor Effectiveness Rating Scale (Myrick & Kelley, 1971). The instruments were administered in the tenth week of the counseling practicum semester. Analyses of the data revealed a statistically significant interaction between the older practicum students' …
Date:
August 2002
Creator:
Abney, Paul C.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Impact of Anti-S2 Peptides on a Variety of Muscle Myosin S2 Isoforms and Hypertrophic Cardiomyopathy Mutants Revealed by Fluorescence Resonance Energy Transfer and Gravitational Force Spectroscopy
Myosin subfragment-2 (S2) is an intrinsically unstable coiled coil. This dissertation tests if the mechanical stability of myosin S2 would influence the availability of myosin S1 heads to actin thin filaments. The elevated instability in myosin S2 coiled coil could be one of the causes for hypercontractility in Familial Hypertrophic Cardiomyopathy (FHC). As hypothesized FHC mutations, namely E924K and E930del, in myosin S2 displayed an unstable myosin S2 coiled coil compared to wild type as measured by Fluorescence Resonant Energy Transfer (FRET) and gravitational force spectroscopy (GFS). To remedy this, anti-S2 peptides; the stabilizer and the destabilizer peptides by namesake were designed in our lab to increase and decrease the stability of myosin S2 coiled coil to influence the actomyosin interaction. Firstly, the effectiveness of anti-S2 peptides were tested on muscle myosin S2 peptides across MYH11 (smooth), MYH7 (cardiac), and MYH2 (skeletal) with GFS and FRET. The results demonstrated that the mechanical stability was increased by the stabilizer and decreased by the destabilizer across the cardiac and skeletal myosin S2 isoform but not for the smooth muscle isoform. The destabilizer peptide had dissociation binding constants of 9.97 × 10-1 μM to MYH7 isoform, 1.00 μM to MYH2 isoform, and no …
Date:
August 2020
Creator:
Aboonasrshiraz, Negar
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Finitness and Verb-Raising in Second Language Acquisition of French by Native Speakers of Moroccan Arabic
In this thesis, the three hypotheses on the nature of early L2 acquisition (the Full Transfer/Full Access view of Schwartz and Sprouse (e.g., 1996), the Minimal Trees view of Vainikka and Young-Scholten (e.g., 1996), and the Valueless Features view of Eubank (e.g., 1996)), are discussed. Analysis of the early French production by two native speakers of Moroccan Arabic is done to determine if the L1 grammar is transferred onto the L2 grammar. In particular, the phenomena of verb-raising (as determined by the verb's position vis-a-vis negation) and finiteness are examined. The results of this study indicate that the relevant structures of Moroccan Arabic do not transfer onto the emerging French grammar.
Date:
August 1996
Creator:
Aboutaj, Heidi H. (Heidi Huttar)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Derivatives of 1,4-Naphthoquinone and 1,4-Anthraquinone
The purpose of this investigation was the synthesis of some 1,4-naphthoquinones and 1,4-anthraquinones. It will be shown that some of these substituted quinones exhibit physiological properties.
Date:
August 1959
Creator:
Aboytes, Peter
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library