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Number Theoretic Analogies for Certain Theorems and Processes in the Theory of Equations
The aim of this paper is to exhibit analogs in Number Theory of certain well known theorems and methods of the Theory of Equations. digital.library.unt.edu/ark:/67531/metadc70282/
A Numerical Method for the Calculation of the Inertial Loads on an Airplane
This paper is an extension of various projects that the writer has been associated with at Chance Vought Aircraft, Incorporated. digital.library.unt.edu/ark:/67531/metadc107988/
Le Nuove Musiche: Giovanni Battista Bovicelli?
This thesis is a comparative study on the late 16th century manuals of ornamentation by Girolamo Dalla Casa, Giovanni Bassano, Riccardo Rognoni, and Giovanni Battista Bovicelli. The study demonstrates that the latest Renaissance manual should be given more credit for the innovative ornamentation style that was to come in the Early Baroque era. Bovicelli's use of sequence, dissonances, and less moving notes for more rhythmic varieties are features most often associated in the style of the Baroque. Unfortunately, the topic of ornamentation in the late Renaissance is most commonly discussed as a group of different entities writing in the same style. The research for this paper is intended to separate the manuals of the late Renaissance, focusing on the separate styles that led to the work of Giovanni Battista Bovicelli. digital.library.unt.edu/ark:/67531/metadc30458/
Nutritional Labeling on Menus in Full-Service Restaurants: Consumer Attitudes and Intended Usage
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Dining out has become an important part of the American lifestyle, greater frequencies as well as increased portion sizes have led to concern. The number of Americans that are classified as overweight or obese has also increased considerably, and the foodservice industry has become a target. Mandatory labeling of menu items has been avoided to this point, but the subject has moved to the forefront and continues to be debated. This study surveyed 502 patrons at a student-run restaurant in Texas. Respondents provided information concerning their health and dining habits as well as their attitudes toward and intended usage of nutritional information (NI) on menus in full-service restaurants. Gender, education levels, age, and household income affect the attitudes toward and intended usage of NI. Exercise frequency, the current use of nutritional information on packaged foods, and the practice of healthy eating habits are all related to the intended use of NI while dining out. digital.library.unt.edu/ark:/67531/metadc4813/
Obligately Thermophilic Nitrogen-Fixation in Some Soil Bacteria
In the work presented here, it is claimed that bacteria have been isolated which are capable of growth at high temperatures utilizing molecular nitrogen as their sole nitrogen source. Soil bacteria were isolated which grew at 55 C in nitrogen-free media. They were found to be obligatory thermophiles in nitrogen-free media and facultative thermophiles in media containing organically bound nitrogen. digital.library.unt.edu/ark:/67531/metadc131436/
Obra Dramatica de Manuel Ortiz de Pinedo
This work studies the arguments of eleven of Manuel Ortiz de Pinedo's works, which the author considers as a matter of research and worthy of criticism and analysis on everything related to their themes, characters and resources used by the playwright. digital.library.unt.edu/ark:/67531/metadc163878/
Las Obras de Carlos Fuentes
This thesis considers the novels of Carlos Fuentes from a thematic point of view, as well as looking at the place of the writer in Mexican narrative tradition. It also presents a brief history of the Mexican novel. digital.library.unt.edu/ark:/67531/metadc130663/
An Observation of Early Parent-Infant Social Interactions in Relation to the Emergence of Joint Attention in the Natural Environment
Early interactions between parents and infants are thought to be critical of later development. In particular joint attention has been an area of research and investigations. This study sought to measure joint attention behaviors in infants from 5 to 33 weeks of age under naturalistic conditions: in the home with the mother as the interaction partner given no instructions. Videotapes of the infant-parent interactions were observed and data were collected on behaviors related to joint attention. Given observations occur at younger ages than other studies considered, engagement data results indicate increasing trends for 3 of the 5 infants observed while the direction of infant gaze results indicate patterns consistent with descriptions currently in the literature. Parent behavior data indicate high levels of support in engaging infant attention. Furthering an understanding of joint attention by observing at earlier ages in infant development may be useful in informing teaching programs for infants who have not developed joint attention skills. digital.library.unt.edu/ark:/67531/metadc30428/
An Observation System to Aid in the Evaluation and Implementation of Early Intervention Programs for Children with Autism
Early and intensive behavioral intervention outcome research includes descriptions of intervention variables that may increase treatment success. This study was designed to develop an observation system that incorporates and expands on some of these variables. Measures include the number of interventionist teaching units, types of skills addressed during instruction, consequences programmed by interventionists, and engagement with teaching materials. This system allowed for a view of the differences in teaching behaviors among the participants. It is proposed that this observation system is a start toward standardized intervention measures that can be applied to evaluate varied treatment models. Such standardization can help in ensuring that all children have access to evidence-based services. digital.library.unt.edu/ark:/67531/metadc9928/
An Observational Investigation of On-Duty Critical Care Nurses' Information Behavior in a Nonteaching Community Hospital
Critical care nurses work in an environment rich in informative interactions. Although there have been post hoc self-report survey studies of nurses' information seeking, there have been no observational studies of the patterns and content of their on-duty information behavior. This study used participant observation and in-context interviews to describe 50 hours of the observable information behavior of a representative sample of critical care nurses in a 20-bed critical care hospital unit. The researcher used open, in vivo, and axial coding to develop a grounded theory model of their consistent pattern of multimedia interactions. The resulting Nurse's Patient-Chart Cycle describes nurses' activities during the shift as centering on a regular alternation with the patient and the patient's chart (various record systems), clearly bounded with nursing "report" interactions at the beginning and the end of the shift. The nurses' demeanor markedly changed between interactions with the chart and interactions with the patient. Other informative interactions were observed with other health care workers and the patient's family, friends and visitors. The nurses' information seeking was centered on the patient. They mostly sought information from people, the patient record and other digital systems. They acted on or passed on most of the information they found. Some information they recorded for their personal use during the shift. The researcher observed the nurses using mostly patient specific information, but they also used some social and logistic information. They occasionally sought knowledge based information. Barriers to information acquisition included illegible handwriting, difficult navigation of online systems, equipment failure, unavailable people, social protocols and mistakes caused by multi-tasking people working with multiple complex systems. No formal use was observed of standardized nursing diagnoses, nursing interventions, or nursing outcomes taxonomies. While the nurses expressed respect for evidence-based practice, there clearly was no time or opportunity for reading research literature (either on paper or online) while on duty. All participants expressed frustration with the amount of redundant data entry required of them. The results of this study have significant implications for the design of clinical information systems and library services for working critical care nurses. digital.library.unt.edu/ark:/67531/metadc4498/
Observations on the Life History of the Brown Spider, Loxosceles Reclusa Gertsch and Muliak
This research was undertaken primarily to further elucidate the life history of this medically important spider. Special attention was given to rearing experimental spiders under as near-natural environmental conditions as possible. digital.library.unt.edu/ark:/67531/metadc163910/
Observed Eye Contact between Selected Students and Teacher in the Music Making Process
High school band members (N=13) and their teacher were observed during six rehearsals of two contrasting band compositions over a six-week period. The contrasting compositions were selected by means of a detailed process between me (the researcher) and the teacher (the conductor). One 60-second excerpt of each composition was selected, during the performance of which, the students were observed. Three video tapings of each composition was done in order to capture occasions when the students would look up from their music. Using a technique adapted from Ekman (1997), the band members and teacher were then interviewed in order to reveal the reasons they recalled for looking up from their music. The results showed that the band members looked up in places where the teacher expected eye contact, that the frequency of eye contact changed little from one rehearsal to the next, and that the frequency of eye contact changed little between the two contrasting compositions. In all cases, the band members were able to recall the reasons for looking up from their music, a fact which led to a detailed analysis about the students' own thoughts while they were engaged in playing as an ensemble. The results are discussed in terms of strategies for teaching practice and implications for future research. digital.library.unt.edu/ark:/67531/metadc5380/
Observing and Attending in a Delayed Matching-to-Sample Preparation in Pigeons
Pigeons worked in a titrating delay match-to-sample (TDMTS) procedure in which selecting the correct comparison stimulus increased the delay between sample offset and comparison-array onset and incorrect comparison selections decreased that delay. Prior research in our lab has shown that the stable adjusted value of the retention interval is a curvilinear function of the observing response requirement. The current study examined the effect of the distribution and predictability of observing response requirements on adjusted retention interval values. The data show that unpredictable observing response requirements were more effective in attenuating the deleterious effects of delay on matching accuracy. The data have implications for our understanding of attending and encoding in performances involving remembering over short temporal durations. digital.library.unt.edu/ark:/67531/metadc9758/
Occlusion Tolerant Object Recognition Methods for Video Surveillance and Tracking of Moving Civilian Vehicles
Recently, there is a great interest in moving object tracking in the fields of security and surveillance. Object recognition under partial occlusion is the core of any object tracking system. This thesis presents an automatic and real-time color object-recognition system which is not only robust but also occlusion tolerant. The intended use of the system is to recognize and track external vehicles entered inside a secured area like a school campus or any army base. Statistical morphological skeleton is used to represent the visible shape of the vehicle. Simple curve matching and different feature based matching techniques are used to recognize the segmented vehicle. Features of the vehicle are extracted upon entering the secured area. The vehicle is recognized from either a digital video frame or a static digital image when needed. The recognition engine will help the design of a high performance tracking system meant for remote video surveillance. digital.library.unt.edu/ark:/67531/metadc5133/
The Occult as a Dramatic Device in Shakespearean Tragedy
What this study will demonstrate is that Shakespeare's use of occult manifestations is not as superficial as it is sometimes said to be. On the contrary, it is the contention of this study that, especially in certain of the major tragedies, occult phenomena are integral to the main action, provide the play with essential motivation, and, in fact, are indispensable to a proper resolution. digital.library.unt.edu/ark:/67531/metadc130846/
The Occupational Aspirations and Expectations of Students Majoring In Jazz Studies At The University Of North Texas
The purpose of this study was to identify the occupational aspirations and expectations of students majoring in jazz studies, and to investigate relationships between students' aspirations, expectations and selected variables including significant others, choice of school, instrument type, academic achievement, academic level, socioeconomic status, age, gender, and early jazz experience. All jazz studies majors enrolled at the University of North Texas during the Spring 2001 academic semester responded to a pilot test questionnaire (return rate 85%, N = 211). Frequencies, percentages, means, and standard deviations described the students' occupational aspirations, occupational expectations, backgrounds and training in jazz prior to entering UNT, and determined the extent to which parents, relatives, teachers, friends, and role models helped steer them into jazz (Pearson r, Spearman Rho and Point Biserial correlation coefficients provided). The low to moderate positive correlation between aspirations and expectations (r = 0.43) indicated that the two variables were different and measured different types of occupations. Fifty percent of students aspired to be jazz performers whereas 29.7% expected to be jazz performers. While 42% aspired to be engaged in a combination of occupational activities, 48% expected a combination of occupational activities. Only 4.7% aspired to teach; however, almost 16% expected to be engaged in teaching. Low positive correlations were found between aspirations and significant others, expectations and significant others, expectations and gender, and expectations and role models. Respondents indicated that role models (jazz musicians, community musicians, and college instructors) had contributed the most to their decision to major in jazz. Recommendations for educators, researchers, and improvements to the questionnaire are provided. digital.library.unt.edu/ark:/67531/metadc5810/
Occupational Opportunities and Requirements for Business Office and Sales Employment in Kingsville, Texas
The purpose of the survey was to study the business organizations from the standpoint of type, number of office employees, and the type and number of office machines used, in order that the commercial courses of the Kingsville High School could be patterned to these business needs. digital.library.unt.edu/ark:/67531/metadc75336/
Occupational Opportunities for the Woman College Graduate in Specialized Business Fields
The purpose of this study is to make a survey of the opportunities in the business world for the woman college graduate. Attention has been given to the general status of women workers, the training given by colleges in business administration, and the opportunities for the employment and advancement in the business world. digital.library.unt.edu/ark:/67531/metadc53445/
Occupational therapy academic program faculty attitudes toward tenure as measured by the Tenure Attitude Scale
This study explored attitudes of occupational therapy faculty toward tenure and selected alternatives to tenure. A survey method was employed, and the Tenure Attitude Survey Instrument, (TASI), was created for use in the study. Additionally, a questionnaire sought information regarding respondents' rank, tenure and administrative status, institutional type, and years in academia. Participants were accredited occupational therapy professional program faculty who identified their primary work setting as "Academic" on the 2000-2001 American Occupational Therapy Association membership survey. Factor analysis of 577 surveys examined the structure of scores on the TASI, and the instrument consisted of 4 scales, and 18 items, as follows: Scale One: Attitude toward academic freedom and job security protection, 7 items; Scale Two: Attitude toward tenure in general, 6 items; Scale Three: Attitude toward stop-the-tenure clock provisions, 2 items; and Scale Four: Attitude toward post-tenure review, 3 items. Cronbach's alpha was conducted, as follows: TASI overall alpha = .7915; Scale 1 alpha = .7884; Scale 2 alpha = .8420; Scale 3 alpha = .7020; Scale 4 alpha = .4229. Proportional analysis showed that most respondents were full time faculty (88.1%); taught full time at public institutions (52.8%); were tenured or tenure-track (55.5%); had no administrative duties (70.5%); with a rank of instructor or lecturer (17.5%), or assistant professor (45.7%). Time in academia ranged from 1-40 years, with a mean of 11.27 years, median of 9.25 years, and mode of 4 years. Attitudes toward, and support for, the continuation of tenure and for selected proposed alternatives to tenure were analyzed according to the following: faculty rank, administrative status, and tenure status. Respondents held generally favorable attitudes toward tenure as measured by Scales 1 and 2 of the TASI, and the best predictors of faculty attitude toward tenure were tenure status and rank. Due to low reliability scores on Scales 3 and 4, no conclusions can be drawn regarding respondents' attitudes toward alternatives to tenure. digital.library.unt.edu/ark:/67531/metadc3265/
An Occupational Therapy Curriculum Study
In order to provide an understanding of the curricula of the colleges and universities active in the training of occupational therapists and to assist in gaining knowledge from their experience, this study attempts to analyze the training program of all these schools. The available information, as well as a resulting "connecting thread" in these different curricula, will aid any college or university that wishes to accept the challenge of the aforementioned demand in establishing an outstanding department of occupational therapy. digital.library.unt.edu/ark:/67531/metadc97075/
Ocean of Forms: for Soprano and Computer
Ocean of Forms is a cycle of five songs for solo soprano voice and electronic/computer music accompaniment on poems by noted Bengali poet, musician, philosopher, and author Rabindranath Tagore. This work approaches the song cycle as a vehicle for expressing and highlighting the poet's words. Word and syllabic stress, text painting, melodic development, and formal structure all function in relation to the text and its meaning. the replacement of the traditional piano accompaniment with electronic accompaniment provides further possibilities for new timbral structures and transformations, expressive microtonal intonation, algorithmic and aleatoric formal structures, acousmatic and spatialized sound, and a broad sonic palette. This work strives to provide a more fully developed expression of the text as afforded by these expanded musical means. the critical essay primarily explores the interaction between text and music in the work. the first chapter explores the historical precedents for the genre of the song cycle and other texted music as well as specific influences on the work. the following chapters explore the connections between the text and the vocal line and electronic/computer music, respectively. the final chapter deals with the formal structure of the work, especially the justly-tuned harmonic scheme and its relation to the text. digital.library.unt.edu/ark:/67531/metadc115141/
Octatonic pitch structure and motivic organization in George Walker's Canvas for wind ensemble, voices, and chorus.
Canvas was commissioned by the College Band Directors National Association (CBDNA) Consortium in fall 1999 for the CBDNA Biennium National Conference to be held at the University of North Texas in February 2001. This substantial and profound three-movement work is Pulitzer Prize winning composer George Walker's first work for wind ensemble and is a milestone in wind composition at the turn of the millennium. This analysis considers Walker's sophisticated use of octatonic collections and their subsets. Walker uses the three transpositions of the octatonic scale as a harmonic framework for the work. Within this framework, specific subsets of the collection are used in traditional harmonic ways. A hierarchy of pitch sets is created, lending a "tonic" function characteristic to prevalent and specifically placed sonorities. Onto this "canvas" of octatonic harmonies, Walker "paints" specific motivic gestures. These motivic gesture monopolize specific intervallic relationships that are initially presented in the beginning of the work. Certain motivic techniques are then employed in the ongoing development of the motivic content. These motivic techniques include melodic suspension, interval alternation, double stroke articulation, irregularly recurring patterns, chordal punctuations, interrupted sequences, and dramatic uses of silence. Formally, Walker uses short "cells" of similar motivic and harmonic content as a tool of organization. digital.library.unt.edu/ark:/67531/metadc4192/
Odorous Metabolite and Other Selected Studies of Cyanophyta
The purpose of this study was as follows: 1. Elucidate the laboratory conditions under which Anabaena circinalis produces the noxious odor component or components in maximum concentration, 2. Isolate the major noxious odorous metabolite(s), 3. Structurally define the odorous metabolite(s), 4. Quantitate the amount of metabolite(s) that a given amount of the organism produced. digital.library.unt.edu/ark:/67531/metadc164437/
Of Time and Judicial Behavior : Time Series Analyses of United States Supreme Court Agenda Setting and Decision-making, 1888-1989
This study examines the agenda setting and decision-making behavior of the United States Supreme Court from 1888 to 1989. digital.library.unt.edu/ark:/67531/metadc277657/
Officer attitudes toward organizational change in the Turkish National Police.
This dissertation emphasizes the importance of the human factor in the organizational change process. Change - the only constant - is inevitable for organizations and no change program can be achieved without the support and acceptance of organization members. In this context, this study identifies officer attitudes toward organizational change in the Turkish National Police (TNP) and the factors affecting those attitudes. The Officer Attitude Model created by the researcher includes six main factors (receptivity to change, readiness for change, trust in management, commitment to organization, communication of change, and training for change) and five background factors (gender, age, rank, level of education, and work experience) to explain officer attitudes toward change. In order to test this model, an officer attitude survey was administered in Turkey among TNP members and the results of the gathered data validated this model. digital.library.unt.edu/ark:/67531/metadc3977/
Oh G-d, A Borderline: Clinical Diagnostics As Fundamental Attribution Error
Researchers raise concerns that the diagnostic approach can create stigma and lead to clinical inferences that focus on dispositional characteristics at the expense of situational variables. From social cognitive theory to strict behavioral approaches there is broad agreement that situation is at least as important as disposition. The present study examined the clinical inferences of graduate student clinicians randomly presented a diagnosis (borderline PD) or no diagnosis and either randomly given context information or no context information before watching a videotaped clinical interaction of a fabricated client. Responses to a questionnaire assessing dispositional or situational attributions about the client’s behavior indicated a diagnosis of borderline personality disorder did not significantly increase dispositional attributions and did not significantly moderate the importance of contextual factors. A notable difference between the attributions made by psychodynamic and third wave behavioral respondents was observed. Conceptual and experimental limitations as well as future directions are discussed. digital.library.unt.edu/ark:/67531/metadc103389/
OLAP Services
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On-line Analytical Processing (OLAP) is a very interesting platform to provide analytical power to the data present in the database. This paper discusses the system designed which handles integration of data from two remote legacy reservation systems to merge as one Integrated database server and also the design of an OLAP database and building an OLAP cube for the data warehousing. OLAP cube is useful for analysis of data and also for making various business decisions. The Data Transformation Services (DTS) in the Microsoft® SQL Server 2000 is used to integrate as a package the collection of data and also for refreshing data in the databases. On-line Analytical Processing (OLAP) cube is designed using Microsoft® Analysis Server. digital.library.unt.edu/ark:/67531/metadc4356/
Older Workers: Disability And Employment
The purpose of this study was to explore the demographic variables, typical vocational services, and competitive employment rates of older workers, ages 40 - 69 years of age, with disabilities using the RSA-911 database. The results describe the types of services received and the competitive employment outcomes for state and federal vocational rehabilitation consumers receiving services in 2009. Furthermore the sample of older workers (N = 1,152) was equally stratified into three age groups. Older workers, aged 60 to 69, had higher levels of education, received more types of vocational services, and were competitively employed at a much higher rate than those in the other age groups. The methods, discussion, study limitations, and recommendations for future research are presented. digital.library.unt.edu/ark:/67531/metadc103355/
Oligonucleotide guanosine conjugated to gallium nitride nano-structures for photonics.
In this work, I studied the hybrid system based on self-assembled guanosine crystal (SAGC) conjugated to wide-bandgap semiconductor gallium nitride (GaN). Guanosine is one of the four bases of DNA and has the lowest oxidation energy, which favors carrier transport. It also has large dipole moment. Guanosine molecules self-assemble to ribbon-like structure in confined space. GaN surface can have positive or negative polarity depending on whether the surface is Ga- or N-terminated. I studied SAGC in confined space between two electrodes. The current-voltage characteristics can be explained very well with the theory of metal-semiconductor-metal (MSM) structure. I-V curves also show strong rectification effect, which can be explained by the intrinsic polarization along the axis of ribbon-like structure of SAGC. GaN substrate property influences the properties of SAGC. So SAGC has semiconductor properties within the confined space up to 458nm. When the gap distance gets up to 484nm, the structure with guanosine shows resistance characteristics. The photocurrent measurements show that the bandgap of SAGC is about 3.3-3.4eV and affected by substrate properties. The MSM structure based on SAGC can be used as photodetector in UV region. Then I show that the periodic structure based on GaN and SAGC can have photonic bandgaps. The bandgap size and the band edges can be tuned by tuning lattice parameters. Light propagation and emission can be tuned by photonic crystals. So the hybrid photonic crystal can be potentially used to detect guanosine molecules. If guanosine molecules are used as functional linker to other biomolecules which usually absorb or emit light in blue to UV region, the hybrid photonic crystal can also be used to tune the coupling of light source to guanosine molecules, then to other biomolecules. digital.library.unt.edu/ark:/67531/metadc9065/
Olympic Dances by John Harbison, a Lecture Recital together with Three Recitals of Selected Works of D. Holsinger, P. Granger, K. Husa, B. Rands, R. Vaughan Williams, and Others
John Harbison's Olympic Dances was composed in 1996 and premiered in February 1997. The work was written as a piano score before it was orchestrated for a wind ensemble of 25 winds and two percussionists.The first section of the paper focuses on the various influences that have affected Harbison's compositional style. The composer's educational background includes several prominent teachers whose instruction had great impressions. Special emphasis is placed on those characteristics of Harbison's style that are most prominent in the work with which this paper is concerned, Olympic Dances. Olympic Dances was commissioned by the College Band Directors National Association and premiered at the CBDNA Twenty-ninth National Conference in Athens, Georgia, in a collaborative performance of the University of North Texas Wind Symphony and Pilobolus Dance Theatre. The second part of the paper presents an historical overview of CBDNA commissioning projects along with a summary of the genesis of the commissioning of Olympic Dances. The primary focus of the study appears in the third section of the paper. An analysis of the four movements of Olympic Dances is presented with attention to the objective elements of harmonic and melodic structures along with a focus on orchestration and scoring. This section considers the composer's thoughts on aesthetic concerns, suggested through his written program notes, and elucidated by way of an interview with the author. Special performance concerns related to rehearsal and conducting conclude this chapter. The paper also includes a transcription of the author's interview with John Harbison, a bibliography and a select discography of recent recordings of his works that are currently available. digital.library.unt.edu/ark:/67531/metadc278852/
On Bounded Variation
This paper is primarily concerned with developing the theory of real-valued functions of bounded variation and those ideas which are closely related to this main topic. In addition to this, some emphasis has been placed on the relationship of the theory of functions of bounded variation to specific areas of analysis. In particular, integration theory has been chosen as the vehicle to demonstrate this connection. digital.library.unt.edu/ark:/67531/metadc130728/
On Chaos and Anomalous Diffusion in Classical and Quantum Mechanical Systems
The phenomenon of dynamically induced anomalous diffusion is both the classical and quantum kicked rotor is investigated in this dissertation. We discuss the capability of the quantum mechanical version of the system to reproduce for extended periods the corresponding classical chaotic behavior. digital.library.unt.edu/ark:/67531/metadc278244/
On Continuity of Functions Defined on Unrestricted Point Sets
This thesis is concerned with an investigation of the generalizations of continuous real functions of a real variable. In particular, the relationship between uniform continuity and ordinary continuity is concerned. The concept of uniform continuity was first introduced by Heine about 1900. digital.library.unt.edu/ark:/67531/metadc108019/
On Delocalization Effects in Multidimensional Lattices
A cubic lattice with random parameters is reduced to a linear chain by the means of the projection technique. The continued fraction expansion (c.f.e.) approach is herein applied to the density of states. Coefficients of the c.f.e. are obtained numerically by the recursion procedure. Properties of the non-stationary second moments (correlations and dispersions) of their distribution are studied in a connection with the other evidences of transport in a one-dimensional Mori chain. The second moments and the spectral density are computed for the various degrees of disorder in the prototype lattice. The possible directions of the further development are outlined. The physical problem that is addressed in the dissertation is the possibility of the existence of a non-Anderson disorder of a specific type. More precisely, this type of a disorder in the one-dimensional case would result in a positive localization threshold. A specific type of such non-Anderson disorder was obtained by adopting a transformation procedure which assigns to the matrix expressing the physics of the multidimensional crystal a tridiagonal Hamiltonian. This Hamiltonian is then assigned to an equivalent one-dimensional tight-binding model. One of the benefits of this approach is that we are guaranteed to obtain a linear crystal with a positive localization threshold. The reason for this is the existence of a threshold in a prototype sample. The resulting linear model is found to be characterized by a correlated and a nonstationary disorder. The existence of such special disorder is associated with the absence of Anderson localization in specially constructed one-dimensional lattices, when the noise intensity is below the non-zero critical value. This work is an important step towards isolating the general properties of a non-Anderson noise. This gives a basis for understanding of the insulator to metal transition in a linear crystal with a subcritical noise. digital.library.unt.edu/ark:/67531/metadc278868/
On Envelopes and Extraneous Loci of Differential Equations of Order One and Higher Degree
The purpose of this paper is to examine the properties of the envelope and the extraneous loci associated with the solution curves of ordinary differential equations of the first order and degree greater than one. digital.library.unt.edu/ark:/67531/metadc130469/
On Groups of Positive Type
We describe groups of positive type and prove that a group G is of positive type if and only if G admits a non-trivial partition. We completely classify groups of type 2, and present examples of other groups of positive type as well as groups of type zero. digital.library.unt.edu/ark:/67531/metadc277804/
On Lane's Integral
The problem and purpose of this paper is to develop Lane's Integral in two-space, and then to expand these concepts into three-space and n-space. Lane's Integral can be used by both mathematicians and statisticians as one of the tools in the calculation of certain probabilities and expectations. The method of presentation is straightforward with the basic concepts of integration theory and Stieltjes Integral assumed. digital.library.unt.edu/ark:/67531/metadc131420/
On Objects and Affections: Contemporary Representations of the Gay Man/Straight Woman Dyad in Popular Film and Television
This project explores the representational strategies used to depict a gay male/straight female dyad across a variety of popular media. The study problematizes and critically evaluates how the narrativization of the dyad both challenges and reinforces stereotypes of gay men and at the same time circulates a troubling image of femininity in the figure of the straight woman. This line of argument is extended to the context of "Lifestyle Television" to demonstrate how the dyad implicitly structures two particular programs. It is suggested that the prevalence of the dyad is in part indicative of an assimilation of a particular gay identity into mainstream culture. The ideological implications of the dyad are discussed throughout this thesis. digital.library.unt.edu/ark:/67531/metadc2706/
On Ordered Pairs of Cardinal Numbers
This thesis is on ordered pairs of cardinal numbers. digital.library.unt.edu/ark:/67531/metadc107930/
On-Road Remote Sensing of Motor Vehicle Emissions: Associations between Exhaust Pollutant Levels and Vehicle Parameters for Arizona, California, Colorado, Illinois, Texas, and Utah
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On-road remote sensing has the ability to operate in real-time, and under real world conditions, making it an ideal candidate for detecting gross polluters on major freeways and thoroughfares. In this study, remote sensing was employed to detect carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxide (NO). On-road remote sensing data taken from measurements performed in six states, (Arizona, California, Colorado, Illinois, Texas, and Utah) were cleaned and analyzed. Data mining and exploration were first undertaken in order to search for relationships among variables such as make, year, engine type, vehicle weight, and location. Descriptive statistics were obtained for the three pollutants of interest. The data were found to have non-normal distributions. Applied transformations were ineffective, and nonparametric tests were applied. Due to the extremely large sample size of the dataset (508,617 records), nonparametric tests resulted in "p" values that demonstrated "significance." The general linear model was selected due to its ability to handle data with non-normal distributions. The general linear model was run on each pollutant with output producing descriptive statistics, profile plots, between-subjects effects, and estimated marginal means. Due to insufficient data within certain cells, results were not obtained for gross vehicle weight and engine type. The "year" variable was not directly analyzed in the GLM because "year" was employed in a weighted least squares transformation. "Year" was found to be a source of heteroscedasticity; and therefore, the basis of a least-squares transformation. Grouped-years were analyzed using medians, and the results were displayed graphically. Based on the GLM results and descriptives, Japanese vehicles typically had the lowest CO, HC, and NO emissions, while American vehicles ranked high for the three. Illinois, ranked lowest for CO, while Texas ranked highest. Illinois and Colorado were lowest for HC emissions, while Utah and California were highest. For NO, Colorado ranked highest with Texas and Arizona, lowest. digital.library.unt.edu/ark:/67531/metadc5524/
On Sets and Functions in a Metric Space
The purpose of this thesis is to study some of the properties of metric spaces. An effort is made to show that many of the properties of a metric space are generalized properties of R, the set of real numbers, or Euclidean n--space, and are specific cases of the properties of a general topological space. digital.library.unt.edu/ark:/67531/metadc131457/
On Steinhaus Sets, Orbit Trees and Universal Properties of Various Subgroups in the Permutation Group of Natural Numbers
In the first chapter, we define Steinhaus set as a set that meets every isometric copy of another set at exactly one point. We show that there is no Steinhaus set for any four-point subset in a plane.In the second chapter, we define the orbit tree of a permutation group of natural numbers, and further introduce compressed orbit trees. We show that any rooted finite tree can be realized as a compressed orbit tree of some permutation group. In the third chapter, we investigate certain classes of closed permutation groups of natural numbers with respect to their universal and surjectively universal groups. We characterize two-sided invariant groups, and prove that there is no universal group for countable groups, nor universal group for two-sided invariant groups in permutation groups of natural numbers. digital.library.unt.edu/ark:/67531/metadc149691/
On the Cohomology of the Complement of a Toral Arrangement
The dissertation uses a number of mathematical formula including de Rham cohomology with complex coefficients to state and prove extension of Brieskorn's Lemma theorem. digital.library.unt.edu/ark:/67531/metadc2198/
On the density of minimal free subflows of general symbolic flows.
This paper studies symbolic dynamical systems {0, 1}G, where G is a countably infinite group, {0, 1}G has the product topology, and G acts on {0, 1}G by shifts. It is proven that for every countably infinite group G the union of the minimal free subflows of {0, 1}G is dense. In fact, a stronger result is obtained which states that if G is a countably infinite group and U is an open subset of {0, 1}G, then there is a collection of size continuum consisting of pairwise disjoint minimal free subflows intersecting U. digital.library.unt.edu/ark:/67531/metadc11009/
On the effects of extended sample-observing response requirements on adjusted delay in a titrating delay matching-to-sample procedure with pigeons.
A common procedural variation that facilitates the acquisition of conditional discriminations is to increase the time an organism spends in the presence of the sample stimulus by programming extended sample-observing response requirements. Despite their common use, there has been little empirical investigation of the effects of extended sample-observing response requirements. In the current study, four pigeons worked on a titrating delay matching-to-sample procedure in which the delay between sample offset and comparison onset was adjusted as a function of the pigeons' accuracy. The number of responses required to produce the comparison array was manipulated across conditions. Results show that all subjects were able to withstand longer delays between sample offset and comparison onset as sample-observing response requirements increased. These data show that the extent of the response requirement in the presence of the sample has systematic effects on conditional discrimination performances and should be considered in the design of experiments. digital.library.unt.edu/ark:/67531/metadc4864/
On the Existence and Uniqueness of Solutions of Two Differential Equations
The purpose of this paper is to study two differential equations. A method of approximation by iteration is used to define sequences of functions which converge to solutions of these equations. Some properties of the solutions are proved for general boundary conditions and certain special solutions are studied in detail. digital.library.unt.edu/ark:/67531/metadc130625/
I. On the Mechanism of Acid Promoted Rearrangement of PCU-Derived Pinacols II. Synthesis of a Trimethyltrishomocubyl Helical Tubuland Diol
I. Reductive dimerization of pentacyclo[5.4.0.0.^2,6.0^3,10.0^5'9]undecane-8-one-(PCU-8-one, 53) affords a mixture of meso and d,l pinacols (55a and 55b respectively). Acid promoted rearrangement of 55a and 55b conceivably can proceed with migration of C(7)-C(8) and/or C(8)-C(9) to form the corresponding pinacolone(s). In our hands, acid promoted rearrangement of 55a and 55b each proceeds with exclusive migration of C(7)- C(8) bond, thereby affording 58a and 59a respectively. Mechanistic features of this rearrangement are discussed. II. 4,7,1 l-trimethylpentacyclo[6.3.0.0.^2,6.0^3,l0.0^5,9]undecane-exo-4,exo-7-diol (23a) was successfully synthesized. This diol crystallizes in a helical tubuland lattice although its molecular structure does not possess C2 rotational symmetry. digital.library.unt.edu/ark:/67531/metadc277859/
On the Relation between Stimulus Equivalence and Extension of Stimulus Function
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The purpose of this study was to examine the relation between stimulus equivalence (briefly, networks of relations among stimuli) and the extension of stimulus function (briefly, spread of effect across network) more closely than has been possible before. The traditional view of this relation suggests that equivalence classes mediate the extension of stimulus function and are, therefore, necessary for any extension to occur. This study used a preparation in which the conditional discriminations required for the development of equivalence classes and the simple discriminations required for the extension of function were trained or tested simultaneously. Results suggest that equivalence are not necessary for the extension of stimulus function though they may be sufficient. digital.library.unt.edu/ark:/67531/metadc4462/
On the Stielitjes Integral
This paper is a study of the Stieltjes integral, a generalization of the Riemann integral normally studied in introductory calculus courses. The purpose of the paper is to investigate many of the basic manipulative properties of the integral. digital.library.unt.edu/ark:/67531/metadc164008/
On the subjective distinction between tenderness and joy.
Previous studies have shown that the experience of joy normally accompanies the experience of tenderness or love. Theorists have thus suggested that tenderness is not a distinct emotion, but rather a variety of joy. The present study explored whether it is possible to induce tenderness while inhibiting joy. Participants watched scenes designed to induce different emotions. Results showed that a scene could induce high levels of tenderness and low levels of joy if that scene also induced high levels of sadness. These findings suggest the need to reconsider theoretical assumptions regarding the distinction between tenderness and joy. digital.library.unt.edu/ark:/67531/metadc5455/