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Integrating Selective Herbicide and Native Plant Restoration to Control Alternanthera philoxeroides (Alligator Weed)
Exotic invasive aquatic weeds such as alligator weed (Alternanthera philoxeroides) threaten native ecosystems by interfering with native plant communities, disrupting hydrology, and diminishing water quality. Development of new tools to combat invaders is important for the well being of these sensitive areas. Integrated pest management offers managers an approach that combines multiple control methods for better control than any one method used exclusively. In a greenhouse and field study, we tested the effects of selective herbicide application frequency, native competitor plant introduction, and their integration on alligator weed. In the greenhouse study, alligator weed shoot, root, and total biomass were reduced with one herbicide application, and further reduced with two. Alligator weed cumulative stem length and shoot/root ratio was only reduced after two applications. In the greenhouse, introduction of competitors did not affect alligator weed biomass, but did affect shoot/root ratio. The interaction of competitor introduction and herbicide did not significantly influence alligator weed growth in the greenhouse study. In the field, alligator weed cover was reduced after one herbicide application, but not significantly more after a second. Introduction of competitor species had no effect on alligator weed cover, nor did the interaction of competitor species and herbicide application. This …
Date:
December 2011
Creator:
Adams, Justin
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Music in the Oklahoma Territory, 1889-1907
This study is a history of the musical activities in the Territory of Oklahoma from 1889 to 1907. Material for this dissertation was gathered from newspapers, books, periodicals, letters, sheet music, concert programs, college catalogues, church records, and photographs. Oklahoma City and Guthrie, the most important cities of the territory, provide the locals for the greater part of the study. These two communities reflect the cultural tastes and activities of the entire territory.
Date:
August 1979
Creator:
Adams, K. Gary
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Adolescent Self-Theories of Singing Ability within the Choral Hierarchy
The purpose of this study was to explore adolescent self-views of singing ability through both implicit theories and self-concept meaning systems. A secondary purpose of this study was to examine these self-views specifically in the context of a choral hierarchy. Using a researcher-designed survey instrument, I gathered data from middle- and high-school students currently enrolled in a choir program organized in a hierarchical structure. I analyzed descriptive statistics of survey responses to items designed to measure implicit theories of singing ability, singing self-concept, and goal orientation. I also examined differences among participants by ensemble placement in implicit theory and self-concept scores, correlation between implicit theory and self-concept, and whether implicit theory, self-concept, goal orientation, or current enrollment could predict future enrollment decisions. In addition to these quantitative measures, I coded open-ended responses to two failure scenarios and examined participant responses by ensemble and gender. Both implicit theory and self-concept scores were higher for participants at the top of the choral hierarchy than at the bottom. Open-ended responses, however, did not align with the implicit theory scale and a number of students presented a false growth mindset. Open-ended responses also indicated that failure scenarios were likely to result in an altered …
Date:
May 2020
Creator:
Adams, Kari
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Gradient-Index Metamaterial Infrared Detector for Enhanced Photo-Response and Image Quality
An enhanced thermal imaging concept made possible through the development of a gradient-indexed metamaterial infrared detector that offers broadband transmission and reflection in THz waves. This thesis proposes a proof of feasibility for a metamaterial infrared detector containing an anti-reflective coating with various geometrically varying periodic metasurfaces, a gradient-indexed dielectric multilayer for near-perfect longpass filtering, and a gradient index of refraction (GRIN) metalens for enhanced focal plane thermal imaging. 2D Rigorous Coupled-Wave Analysis (RCWA) is used for understanding the photonic gratings performance based on material selection and varying geometric structure. Finite Difference Time Domain (FDTD) is used to characterize performance for a diffractive metalens by optimizing the radius and arrangement of cylindrical nanorods to create a desired phase profile that can achieve a desired focal distance for projections on a detector for near- to far-infrared thermal imaging. Through combining a micromachined anti-reflective coating, a near-perfect longpass filter, and metamaterial GRIN metalens, infrared/THz focal plane thermal imaging can obtain faster photo-response and image quality at targeted wavelengths, which allows for scientific advancements in electro-optical devices for the Department of Defense, aerospace, and biochemical detection applications.
Date:
May 2022
Creator:
Adams, Kelsa Derek
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Pandiatonicism in Three Ballets by Aaron Copland
Analysis of Appalachian Spring, Rodeo, and Billy the Kid
Date:
December 1972
Creator:
Adams, Kenny L.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Increasing Exercise in Sedentary Adults Using a Contingency and Technology-Based Management Package to Begin and Sustain New Levels of Activity
Using a multiple baseline across participants with a changing criterion, this study explored and evaluated the effects of the individualized contingency management package (goal-setting, education, etc.) with sedentary typical adults while focusing on the mentoring component and the use of the technology of the exercise tracker to increase and sustain physical exercise to a level that increased health-benefiting physical activity. During initial mentoring meeting prior to the start of baseline, each participant was given a Garmin Viovsmart 3® exercise tracker, educated on the basic components of the device, and connected to the dashboard through the Garmin Connect™ app on their smartphones. Once each participant's activity stabilized, participant began intervention with weekly mentoring meetings focused on immediate feedback (social reinforcement), goal-setting and education. Through the Connect™ app, experimenter gave social reinforcement on a VR3 schedule to each participant, and participants were encouraged to participate by commenting to other participants through a private group set up for this study. The results indicate that the individualized contingency management package was effective for three of four participants whom increased their total activity minutes from pre-intervention range 0-104 min of weekly activity to post-intervention range of 269-404 min weekly. The two participants that completed two- …
Date:
August 2019
Creator:
Adams, Kristen Lea
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Economic Development in Texas During Reconstruction, 1865-1875
The study challenges many traditional stereotypes of Texas during Reconstruction. Contrary to what Democrats charged, the Davis government did not levy exorbitant taxes. Radical taxes seemed high in comparison to antebellum taxes, because antebellum governments had financed operations with indemnity bonds, but they were not high in comparison to taxes in other states. Radical taxes constituted only 1.77 percent of the assessed value of property in Texas, which was lower than the average for the United States and about the same for other states undergoing Reconstruction. In Texas most of the tax increases during Reconstruction were made necessary by the Civil War and the increase in population. The tax increases paid for state and local governments, frontier and local protection, public buildings, internal improvements, and public schools. Edmund J. Davis, Radical governor, contributed significantly to Texas government when he attempted to focus attention on reforming the tax system,limiting state expenses to state income, limiting state aid for railroad companies, and protecting the public from railroad company abuses.
Date:
August 1980
Creator:
Adams, Larry Earl
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
"The military unlocked that door for me": Collegiate Experiences of Women Veterans in STEM Majors
Institutions of higher education are a key pathway for supplying the science, technology, engineering, and mathematics (STEM) workforce. Military service members have been identified as STEM-ready and a potential pool for STEM as they transition into civilian careers. Furthermore, women are the fastest growing subpopulation of veterans and may decrease the gender gap within STEM. Higher education researchers are interested in understanding the characteristics and experiences of students who select STEM majors and then persist to graduation. Literature related to women veterans is limited and a qualitative case study approach was utilized to achieve an in-depth understanding of their college experiences. This study examined four women who were successfully navigating STEM majors at one institution and revealed their varying motivations for enrollment and persistence. Three themes generated from this study included: self-awareness, success is personal, and military experience matters. Subsidiary themes included starting over; strategy; salience of age; stage of life; self-advocacy; standards; personal attributes; past experiences; personal responsibility for learning; procuring resources; career path (STEM) reinforced or introduced; creditable and credible; and cultivated soft skills. Veteran critical theory, multiple dimensions of identity and intersectionality were useful frameworks to reference as participants expressed the influence of their identities on their …
Date:
May 2022
Creator:
Adams, Lisa Dawn
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Effects of Contingency Type on Accuracy and Reaction Time
Positive and negative reinforcement contingencies have been compared in terms of preference, but the differential effects of positive and negative reinforcement on reaction time and accuracy with other variables controlled remain unclear. Fifteen undergraduate students participated in a sound discrimination task that involved random mixed-trial presentations of positive and negative reinforcement contingencies. The participants' goal was to correctly identify whether the tone was shorter or longer than 600 milliseconds. On positive reinforcement trials, the participants received feedback and money tallies only if they identified the sound length correctly, with each correct response in the positive reinforcement trials earning the participant 10 cents. On negative reinforcement trials, the participants received feedback and money tallies only if they identified the sound length incorrectly, with incorrect trials subtracting 10 cents from the participants' total money (which began at $4.00 to equalize the weights of the positive and negative reinforcement contingencies). Accuracy analyses showed a relatively curvilinear relationship between the number of errors for each participant and the binned duration of the sound stimulus, with no differences across the positive and negative reinforcement conditions. Results also indicated weak linear negative correlations at the single subject level between comparison stimulus duration and reaction time, with …
Date:
August 2018
Creator:
Adams, Owen James
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Post-Traumatic Symptomatology in the Luby's Shooting
The role of exposure to a human-made disaster and the subsequent development of post-traumatic stress reactions were examined. Subjects included 49 males and 30 females who were variously exposed to the Luby's shooting incident in Killeen, Texas in October of 1991. Post-traumatic stress symptomatology was measured by the SCL-90R. Exposure was operationalized by using a scenario-rating scheme with independent raters estimating each subject's level of exposure. A regression and commonality analysis revealed that exposure is an important predictor in post-traumatic symptomatology. Premorbid functioning and gender were also found to play important roles, with females expressing higher levels of symptomatology.
Date:
December 1993
Creator:
Adams, Pam, 1964-
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Bias in the Diagnosis and Treatment of Gay Males
The purpose of this study was to explore heterosexual bias in the diagnosis and treatment of gay males. Two hundred-fifty (134 males and 116 females) mental health professionals from the Division of Psychotherapy (29) of the American Psychological Association participated in the study. Participants were randomly assigned to one of two case history conditions, which presented a 35-year-old male seeking therapy. Both conditions were equivalent with regards to the presenting problem (i.e., diagnostic symptoms) with the exception of his significant other (i.e., gay vs. non-gay condition). Potential bias was measured through a diagnostic rating Likert scale and a treatment plan questionnaire. Other independent variables that could potentially have an effect on diagnostic ratings were explored, such as gender, year of graduation, and theoretical orientation of the respondents. Results of the statistical analyses failed to confirm evidence of heterosexual bias. Implications for further research and training are discussed.
Date:
December 1996
Creator:
Adams, Pamela (Pamela Ann)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Development and Application of a Rating Scale for the Evaluation of Business Arithmetic Textbooks
The purpose of this study was to prepare a rating scale to be applied as an objective basis in the selection of business arithmetic textbooks. After the rating scale was developed, it was then applied to a number of recently published texts to demonstrate its use and practical value.
Date:
1941
Creator:
Adams, Raymond
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Study of the Impact and Influence of the Recordings and Pedagogy of David Baldwin
David Baldwin has been the trumpet professor at the University of Minnesota since 1974. His most celebrated accomplishment is his recording of the Charlier 36 Etudes de Transcendantes and the Marcel Bitsch Vingt Etudes. In addition to this recording Baldwin has made recordings of etude books by Small, St. Jacome, Arban, Caffarelli, Smith, and the 32 Etudes de Perfectionnement also by Charlier. The quality of performance on all of these makes them excellent reference recordings. The back cover of the Etudes 32 de Perfectionnement reveals that the two-CD album, with a total run time of 115:35, was recorded over a span of four days. Endurance is a topic that all brass players confront. Baldwin wrote an etude book titled Lips of Steel that also contains two previously published articles on the topic of endurance. His ideas on endurance reveal a unique approach. This study analyzes the pedagogical concepts in those articles and in Lips of Steel. In addition to his recording projects, Baldwin has had many successful students. Thomas Rolfs and Lynn Erickson are both members of full-time professional orchestras. Larry Griffin, Scott Hagarty, and many others built their careers as professors of trumpet. An investigation of Baldwin's influence on …
Date:
August 2018
Creator:
Adams, Richard (Richard James)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Dmitri Shostakovich and the Fugues of Op. 87: A Bach Bicentennial Tribute
In 1950-51, for the bicentennial of the death of J. S. Bach, Dmitri Shostakovich wrote his collection of Twenty-four Preludes and Fugues, Op. 87. This thesis is a study of the fugal technique of Shostakovich as observed in Op. 87, in light of the fugal style of Bach as observed in The Well-Tempered Clavier, Volume One. Individual analyses of each of the twenty-four Shostakovich pieces yield the conclusion that Op. 87 is an emulation of Bachian fugal methods as observed in The Well-Tempered Clavier, Volume One.
Date:
August 1981
Creator:
Adams, Robert M. (Robert Michael)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Ethnographic Study of Outstanding, Veteran Elementary Teachers
The purpose of this study was to describe outstanding, veteran elementary teachers using an ethnographic approach. This qualitative study was conducted in a suburban independent school district in northeast Texas serving approximately 17,000 students. The data collected focused on five outstanding, veteran elementary teachers who had at least twenty years of uninterrupted teaching service. Data were collected through interviews, classroom observations, and the administration of the Mind Styles (Gregorc,1982) inventory. The findings of this research were as follows. This study found that many factors were responsible for retaining outstanding, veteran elementary teachers in the work force. These included adequate preparation, a strong personal commitment, a successful initial teaching assignment, a development of skills and abilities inside and outside the teaching field, and professional accomplishments throughout the teaching career.
Date:
August 1992
Creator:
Adams, Sandra K. (Sandra Kay)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Carlos Muñiz and Social Drama
The problem with which this investigation is concerned is that of determining the merit of the works of the contemporary Spanish playwright Carlos Muñiz in the area of social drama.
Date:
May 1973
Creator:
Adams, Sarah Sue
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
"Looking into the Heart of Light, the Silence": The Rule of Desire in T.S. Eliot's Poetry
The poetry of T. S. Eliot represents intense yet discriminate expressions of desire. His poetry is a poetry of desire that extenuates the long tradition of love poetry in Occidental culture. The unique and paradoxical element of love in Occidental culture is that it is based on an ideal of the unconsummated love relationship between man and woman. The struggle to express desire, yet remain true to ideals that have deep sacred and secular significance is the key animating factor of Eliot's poetry. To conceal and reveal desire, Eliot made use of four core elements of modernism: the apocalyptic vision, Pound's Imagism, the conflict between organic and mechanic sources of sublimity, and precisionism. Together, all four elements form a critical and philosophical matrix that allows for the discreet expression of desire in what Foucault calls the silences of Victorianism, yet Eliot still manages to reveal it in his major poetry. In Prufrock, Eliot uses precisionism to conceal and reveal desire with conflicting patterns of sound, syntax, and image. In The Waste Land, desire is expressed as negation, primarily as shame, sadness, and violence. The negation of desire occurred only after Pound had excised explicit references to desire, indicating Eliot's struggle …
Date:
August 1995
Creator:
Adams, Stephen D. (Stephen Duane)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
T. S. Eliot's Ash Wednesday: a Philosophical Approach to Empowering the Feminine
In his 1916 dissertation, Eliot asserted that individuals were locked into finite centers and that all knowledge was epistemologically relative, but he also believed that finite centers could be transcended through language. In the essay "Lancelot Andrewes,'" Eliot identified Andrewes's "relevant intensity," a method very close to nonsensical verse. Eliot used Andrewes's Word and the impersonality of nonsense verse in Ash Wednesday. The Word, God's logos, embodied the Virgin Mary as its source, and allowed Eliot to transcend the finite center through language. Ultimately, Eliot philosophically empowered the feminine as the source of the Word. Though failing to fully empower the earthly Lady in part II of Ash Wednesday, Eliot did present a philosophical plan for transcending the finite center through language.
Date:
August 1992
Creator:
Adams, Stephen D. (Stephen Duane)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Effects of Interactive Reviews and Learning Style on Student Learning Outcomes at a Texas State University
This study investigated the effects of interactive lessons and learning style on student learning outcomes in self-defense education classes. The study utilized an experimental design that incorporated four self-defense education classes at the University of North Texas (UNT) during the fall semester 2007 (N = 87). A pre-test was administered during the first week of class to determine prior knowledge of the participants. The Visual Auditory Reading/Kinesthetic Inventory (VARK) was used to assess the learning styles of the students and was completed after the pre-test of knowledge was administered. The treatment group received the interactive lesson and the control received a paper review. The difference between the pre and posttest was used as a measure of improvement of the student's learning outcomes. A 2 (treatment/control) by 2 (pretest/posttest) ANOVA with repeated measures was conducted to examine the differential improvement in knowledge across the intervention. Based on the 2-way ANOVA there was a significant difference between the treatment group and the control group based on their learning outcomes. A repeated measures ANOVA was conducted to determine if there was a significant difference between the groups based on the pre and post test scores. Based on the results of a one week …
Date:
May 2008
Creator:
Adams, Wesley
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Identification of College Freshmen According to Scholastic and Persistence Potential
This study was designed to develop a procedure for the identification of freshman students at risk in the academic and social integration process at Texas Christian University. The data for the study were collected from the Student Information Form (SIF) and student records system at Texas Christian University. The data included demographic, attitudinal, educational background and one-year persistence indicators (retain and drop) as well as one-year cumulative grade point averages for the fall 1990 entering freshman class.
Date:
December 1992
Creator:
Adams, William F. (William Franklin)
Object Type:
Thesis or Dissertation
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.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A History of Concert Waltzes for Piano (Lecture-Recital) Together with Three Recitals of Selected Works by Rachmaninov, Stravinsky, Schubert, J.S. Bach, Reger, Adams, Covino, Chopin, Schönberg, Ives, and Beethoven
The first three recitals contained solely performances of piano music. The first one consisted of an Etude-Tableau by Rachmaninov, the Capriccio by Stravinsky (the chamberensemble accompaniment arranged for second piano), and the great Sonata in A minor by Schubert. The second recital contained a Prelude and Fugue by J. S. Bach, Reger's Variations and Fugue on a Theme by Bach, a Romance by the performer, Peter Covino's Toccatina Op. 4 No. 8, and Chopin's Nocturne Op. 55 No. 2 and Scherzo in E. The third recital consisted of Schonberg's Sechs Kleine Klavierstilcke, Ives's Some South-Paw Pitching, and the Sonata Op. 106 ("Hammerklavier") by Beethoven. The fourth recital featured a lecture which surveyed the piano waltz throughout its history. Several complete examples, namely Weber's Invitation to the Dance, Chopin's Waltz in A minor, and La Valse by Ravel, and incomplete examples including a Lundler by the performer, several of Schubert's waltzes, Chopin's Waltz Op. 42, and Man Lebt Nur Einmal! by Strauss-Tausig interspersed the lecture. All four recitals, tape-recorded, and the lecture, typewritten, are filed together in the Graduate Office of the North Texas State University.
Date:
May 1978
Creator:
Adams, William Lloyd, Jr.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Comparative Analysis of Haydn's Horn Concerto and Trumpet Concerto
Among the existing solo instrumental concertos of Joseph Haydn's oeuvre are two concertos for brass instruments. These are the Horn Concerto in D Major (Hob. VIId: 3) and Trumpet Concerto in E-flat Major (Hob. VIIe: 1). In addition to their standing as the only two concertos for solo brass instruments written by Haydn in existence, the two concertos provide a unique opportunity for insight into the history of the concerto genre and Haydn's change in compositional style. This is because of their chronological position within Haydn's oeuvre; the Horn Concerto was composed in 1762 during the early years of Haydn's employment with the Esterházy family and the Trumpet Concerto in 1796 as the last known concerto written by Haydn. Significant changes had occurred during that thirty four year time-span, not only in Haydn's life, but also within the field of music. This dissertation examines some of these changes and provides a comparative analysis of these two pieces. More specifically, it employs Schenkerian analysis of the voice-leading and structure of both concertos to examine the transformation in Haydn's compositional style and show the evolution of concerto form. This evolution in style between the Horn Concerto and Trumpet Concerto is most prominently …
Date:
August 2016
Creator:
Adamson, Daniel
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Exploring the Impact of Decentralization of Decision Making and Complexity on Supply Chain Resilience
The purpose of this three-essay dissertation is to synthesize and extend the effects of decentralization in decision-making and supply chain complexity in the context of supply chain resilience (SCRES).First essay contributes to theory and practice by expanding resilience thinking into including supply chain orientation and organizational structure and their implications and also responds to prior research arguing for the importance of identifying organizational factors that improve supply chain resilience. Second essay contributes to the supply chain organizational structure and SCRES literature by not just providing empirical support for decentralization of decision making in times of disruptions but more precisely by showing the factors that either impede or facilitate decentralization at the organizational level. Understanding the interplay among these factors is critical to explaining the lack of success for decentralization in the context of SCRES. Third essay contributes to practice by reviewing some of the major complexity drivers present in the supply chains and providing strategies along with a four-step process that practitioners can use to manage complexity.
Date:
August 2020
Creator:
Adana, Saban
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library