UNT Libraries - 27,661 Matching Results

Search Results

prev Results: 13701 - 13724 next
open access

Nutrient Effects on Autofragmentation of Myriophyllum Spicatum L.

Description: A 2 x 2 factorial design investigated effects of sediment nitrogen and water potassium levels on autofragment production. Reduced nitrogen levels significantly increased autofragment production whereas potassium levels did not significantly alter production. Up to 50% of autofragment production abscised from parent plants grown under low nitrogen conditions compared to 12% or less under high nitrogen conditions.
Date: August 1998
Creator: Smith, Dian H. (Dian Helen)
Item Type: Refine your search to only Thesis or Dissertation
open access

On Chaos and Anomalous Diffusion in Classical and Quantum Mechanical Systems

Description: 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.
Date: August 1998
Creator: Stefancich, Marco
Item Type: Refine your search to only Thesis or Dissertation
open access

Oral Microbiology

Description: Recent studies regarding research on oral microorganisms and the oral diseases are presented. The normal flora of the mouth and the oral environment are first described. Dental plaque and dental caries are primary causes of oral disease. Streptococcus mutans is the major contributor in the initiation and progression of dental caries. Lactobacillus, Actinomyces, and Veillonella are other genera of bacteria linked to dental caries. Periodontitis and gingivitis are periodontal diseases that are ca… more
Date: August 1998
Creator: Osman, Shaiesta
Item Type: Refine your search to only Thesis or Dissertation
open access

Organizational Support Systems for Team-Based Organizations: Employee Collaboration through Organizational Structures

Description: The purpose of this study was to examine relationships between organizational support and Effectiveness, Empowerment, and team characteristics. Support was operationalized by nine systems: Executive Management, Direct Supervision, Group Design, Performance Definition, Performance Review, Training, Rewards, Information, and Integration. Support was rated in two ways: how important is support for performing work (Importance scales), and how does support describe work environments (Presence scales… more
Date: August 1998
Creator: Hall, Christopher Aaron, 1964-
Item Type: Refine your search to only Thesis or Dissertation
open access

Parenting Stress in Mexican American and Caucasian Parents of Children with ADHD

Description: The purpose of the present study was to examine whether differences exist between reports of parental stress in Mexican American and Caucasian mothers of children with ADHD. A second purpose was to examine whether there were child and family characteristics that made unique contributions to levels of parenting stress in Mexican American parents of children with ADHD. A third purpose was to examine the role that level of acculturation plays in the Mexican American mothers' reports of stress. Dep… more
Date: August 1998
Creator: Cleveland, Jennifer
Item Type: Refine your search to only Thesis or Dissertation
open access

Patterns of Relationship Violence among Low Income Women and Severely Psychologically Abused Women

Description: Little research has addressed the degree to which domestic violence is mutual and whether patterns are stable across women's relationships. Studies that exist have conflicting results. This study addressed these issues and the effects of sustaining past violence on women's expressions of violence in their current relationship. Archival data from a sample of severely psychologically abused community women (N = 92) and a sample of low-income community women (N = 836) were analyzed. Results showed… more
Date: August 1998
Creator: Weston, Rebecca
Item Type: Refine your search to only Thesis or Dissertation
open access

Pedagogical and Andragogical Principles of John Wesley's Anthology

Description: This study is a historical and philosophical analysis of significant educational concepts John Wesley espoused during his lifetime from 1703-1791. Specifically this document examines Wesley's use of pedagogical and andragogical principles through the educational undertakings of the early Methodist movement.
Date: August 1998
Creator: Hall, Elaine Friedrich
Item Type: Refine your search to only Thesis or Dissertation
open access

Peer Mediation: an Empirical Exploration Empowering Elementary School Children to Resolve Conflicts Constructively

Description: Conflict is inevitable in school and in life. Many children lack skills necessary to resolve daily conflicts constructively. Without knowledge of positive ways to manage conflicts, violence may result. Limited research suggests that involvement in a peer mediation program may have a positive influence on children. This study assessed effects peer mediation training and mediation experience had on student mediators. The pretest-posttest, control-group, and quasi-experimental study investigated t… more
Date: August 1998
Creator: Link, Kathleen Elizabeth Barbieri
Item Type: Refine your search to only Thesis or Dissertation
open access

Physical and Functional Characterization of the xy1XYZ Region From TOL Plasmid pDK1 and its Associated Downstream Regulatory Elements

Description: The nucleotide sequence for the pDKl TOL plasmid region encoding toluate-1,2-dioxygenase (Xy1XYZ, TO) was determined. TO is the first enzyme in the meta-cleavage operon, responsible for the conversion of toluates and benzoates to their carboxy-substituted diols. DNA sequence analysis revealed the presence of three open reading frames (ORF). The three ORFs correspond to xylX (1353 bp), xylY (486 bp) and xylZ (1008 bp), encoding predicted protein products of 51370 Da, 19368 Da and 36256 Da, respe… more
Date: August 1998
Creator: Hares, Douglas R. (Douglas Ryan)
Item Type: Refine your search to only Thesis or Dissertation
open access

Plane Curves, Convex Curves, and Their Deformation Via the Heat Equation

Description: We study the effects of a deformation via the heat equation on closed, plane curves. We begin with an overview of the theory of curves in R3. In particular, we develop the Frenet-Serret equations for any curve parametrized by arc length. This chapter is followed by an examination of curves in R2, and the resultant adjustment of the Frenet-Serret equations. We then prove the rotation index for closed, plane curves is an integer and for simple, closed, plane curves is ±1. We show that a curve is … more
Date: August 1998
Creator: Debrecht, Johanna M.
Item Type: Refine your search to only Thesis or Dissertation
open access

The Politics of Romance: Henry James's Social (Un)Conscious

Description: This study addresses the ideological properties of the two main modal strains in fictional representation of romance and realism in order to provide an antidote to the currently extremely negative view of the representational function of fiction. In the course of the discussion, three received positions in traditional literary criticism are challenged. Firstly, the view of literary form as ideology-free is undermined by demonstrating the ideological properties of the two modes. Secondly, the re… more
Date: August 1998
Creator: Kim, Bong-Gwang
Item Type: Refine your search to only Thesis or Dissertation
open access

Predicting Workers' Compensation Claims and On-the-Job Injuries Using Four Psychological Measures

Description: This study assessed the predictive validity of four independent factors (Rotter Locus of Control Scale, Safety Locus of Control, Organizational Attribution Style Questionnaire, and Rosenburg Self-Esteem Scale) in the establishment of a measure of safety consciousness in predicting on-the-job injuries and the filing of workers' compensation claims. A 125-item questionnaire was designed and administered to assess participants' disposition on each of the four psychological dimensions, demographic … more
Date: August 1998
Creator: Fore, Todd A.
Item Type: Refine your search to only Thesis or Dissertation
open access

Prediction of Achievement Scores for Adult Learners Using the Productivity Environmental Preference Survey (PEPS): an Exploratory Study

Description: This study attempted to determine, given an individual's learning environment preference as determined by Alone/Peer Oriented scale of the Productivity Environmental Preference Survey (PEPS), if achievement scores could be predicted when given either an individual or a peer-group teaching environment. Participants were graduate students (n = 18) enrolled in a graduate course.
Date: August 1998
Creator: Ison, William T. (William Travis)
Item Type: Refine your search to only Thesis or Dissertation
open access

Predictors of Posttraumatic Stress Disorder in a Community Sample of Women: Examination of the Role of Violence and Ethnicity

Description: The purpose of the current study was to examine Dutton's (1992) model of moderating and mediating variables which may impact the relationship of violence from an intimate partner with the development of posttraumatic stress disorder (PTSD) symptoms. This model was tested within three ethnic groups (African American, n = 303, Euro-American, n = 271, and Mexican American, n = 260), of low income, community women in serious, long-term relationships. The importance of the differences and similarit… more
Date: August 1998
Creator: Vogel, Laura C. M.
Item Type: Refine your search to only Thesis or Dissertation
open access

Primitive Substitutive Numbers are Closed under Rational Multiplication

Description: Lehr (1991) proved that, if M(q, r) denotes the set of real numbers whose expansion in base-r is q-automatic i.e., is recognized by an automaton A = (Aq, Ar, ao, δ, φ) (or is the image under a letter to letter morphism of a fixed point of a substitution of constant length q) then M(q, r) is closed under addition and rational multiplication. Similarly if we let M(r) denote the set of real numbers α whose base-r digit expansion is ultimately primitive substitutive, i.e., contains a tail which is … more
Date: August 1998
Creator: Ketkar, Pallavi S. (Pallavi Subhash)
Item Type: Refine your search to only Thesis or Dissertation
open access

The Process of Ritual: a Twenty-Year Survey of Literature

Description: Use of the term "ritual" in PsycLit from 1975-1995 was examined through an archival study. Abstracts identified as including any form of the term were coded for valence, target population, study type, and differential area of interest. Valence was predominantly positive, consistent across time, with a growing negative trend. Interest in ritual has increased. Key elements of adaptive ritual were identified as recurrence across time, shared symbolism and volitional participation. A Dynamic Proces… more
Date: August 1998
Creator: Emmett, Gloria J.
Item Type: Refine your search to only Thesis or Dissertation
open access

The Prologue in the Seventeenth-Century Venetian Operatic Libretto: its Dramatic Purpose and the Function of its Characters

Description: The Italian seicento has been considered a dead century by many literary scholars. As this study demonstrates, such a conclusion ignores important literary developments in the field of librettology. Indeed, the seventeenth-century operatic libretto stands as a monument to literary invention. Critical to the development of this new literary genre was the prologue, which provided writers with a context in which to experiment and achieve literary transcendence. This study identifies approximately … more
Date: August 1998
Creator: Miller, Robin A. (Robin Annette)
Item Type: Refine your search to only Thesis or Dissertation
open access

Protrapment

Description: It was my intention to create pieces that seem to be both entrapping and protective at the same time. I hope that, as the viewer attempts to interpret each piece, there will be a shift back and forth from one to the other until both sides are accepted and a balance is found.
Date: August 1998
Creator: Herring, Mancel K.
Item Type: Refine your search to only Thesis or Dissertation
open access

Quality-of-Service Provisioning and Resource Reservation Mechanisms for Mobile Wireless Networks

Description: In this thesis, a framework for Quality of Service provisioning in next generation wireless access networks is proposed. The framework aims at providing a differentiated service treatment to real-time (delay-sensitive) and non-real-time (delay-tolerant) multimedia traffic flows at the link layer. Novel techniques such as bandwidth compaction, channel reservation, and channel degradation are proposed. Using these techniques, we develop a call admission control algorithm and a call control block … more
Date: August 1998
Creator: Jayaram, Rajeev, 1971-
Item Type: Refine your search to only Thesis or Dissertation
open access

Re-examining the Battle of the Bulge : Assessing the Role of Strategic Intelligence and Coalition Warfare Against the 1944 Wehrmacht

Description: The 1944 German Ardennes offensive failed. It was overly ambitious, built on erroneous assumptions, insufficiently supported by logistics, and depended on the weather for success. Yet, the offensive achieved more than it should have given the strength and combat experience of the Allied armies in Europe. Previous attempts to explain the limited success of the German offensive have emphasized the failure of Allied strategic intelligence - Ultra. Intelligence is an accurate, but incomplete explan… more
Date: August 1998
Creator: Blanchette, C. Scott (Crispin Scott)
Item Type: Refine your search to only Thesis or Dissertation
open access

The Relationship between Level of African-American Acculturation and Affiliation with Fraternities and Sororities

Description: Ninety-nine African-American undergraduates, at a historically Black college, completed the African American Acculturation Scale to compare fraternity/sorority members with independents' participation in Black cultural traditions versus dominant White society. Greek members were hypothesized to be more traditional, because these organizations represent ethnic enclaves, have duplicate institutions, and communicate ethnic socialization; findings did not support this, but reasons for joining did. … more
Date: August 1998
Creator: Wilcots, Kylynnedra D.
Item Type: Refine your search to only Thesis or Dissertation
open access

Relationship between Perceived Team Leadership Style and Effectiveness Ratings

Description: An abundance of theories exists on what constitutes appropriate team leadership; What seems to be lacking is how the "followers" react when exposed to their tenets. This particular study involves testing a contemporary model (Stewart & Manz, 1995) via interview statements that seem to indicate that a certain form of team leadership is taking place. Once determined, the effectiveness of the leadership "style" that is in effect is assessed using ten different performance dimensions to determine i… more
Date: August 1998
Creator: Yaffe, Michael John
Item Type: Refine your search to only Thesis or Dissertation
Back to Top of Screen