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  Partner: UNT Libraries
 Resource Type: Thesis or Dissertation
 Decade: 2010-2019
Native American Elements in Piano Repertoire by the Indianist and Present-Day Native American Composers

Native American Elements in Piano Repertoire by the Indianist and Present-Day Native American Composers

Date: May 2010
Creator: Thomas, Lisa Cheryl
Description: My paper defines and analyzes the use of Native American elements in classical piano repertoire that has been composed based on Native American tribal melodies, rhythms, and motifs. First, a historical background and survey of scholarly transcriptions of many tribal melodies, in chapter 1, explains the interest generated in American indigenous music by music scholars and composers. Chapter 2 defines and illustrates prominent Native American musical elements. Chapter 3 outlines the timing of seven factors that led to the beginning of a truly American concert idiom, music based on its own indigenous folk material. Chapter 4 analyzes examples of Native American inspired piano repertoire by the "Indianist" composers between 1890-1920 and other composers known primarily as "mainstream" composers. Chapter 5 proves that the interest in Native American elements as compositional material did not die out with the end of the "Indianist" movement around 1920, but has enjoyed a new creative activity in the area called "Classical Native" by current day Native American composers. The findings are that the creative interest and source of inspiration for the earlier "Indianist" compositions was thought to have waned in the face of so many other American musical interests after 1920, but the tradition has ...
Contributing Partner: UNT Libraries
Ida Gotkovsky's Eolienne Pour Flute et Harpe in Theory and Practice: A Critical Analysis

Ida Gotkovsky's Eolienne Pour Flute et Harpe in Theory and Practice: A Critical Analysis

Date: May 2010
Creator: Surman, Patricia Jovanna
Description: This dissertation addresses specific theoretical issues within Gotkovsky's Eolienne. She was a student of Messiaen, and his influence is evident in Eolienne, but at the same time, Gotkovsky's compositional voice is both personally distinctive and reflects l'esprit de temps of the twentieth century Parisian musical world. The research provides extensive analytical insight into Gotkovsky's musical language in Eolienne, specifically her use of symmetrical scales, emphasis on timbre, and formal constructs. Because there are limited scholarly resources available on the subject of flute and harp chamber music, and a small amount of biographical information on Gotkovsky, this dissertation is a significant contribution within the area of chamber music for flute, both historically and theoretically. It provides an analysis of Gotkovsky's musical language and the analysis gives performers access to musical-theoretical information previously unavailable.
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An Historical Analysis of Rule and Policy Changes in the Texas University Interscholastic League One-Act Play Contest, 1986-2006, and the Results of Those Changes: Administrator and Teacher Perceptions

An Historical Analysis of Rule and Policy Changes in the Texas University Interscholastic League One-Act Play Contest, 1986-2006, and the Results of Those Changes: Administrator and Teacher Perceptions

Date: May 2010
Creator: Stevens, David Todd
Description: The University Interscholastic League (UIL) One-Act Play Contest is a competition where similarly sized Texas schools present an 18-40 minute play usually adjudicated by a single judge. At each level of competition the judge awards individual acting awards as well as selecting two productions to advance to the next level of competition. After the awards are announced the judge gives an oral critique to each of the schools. Because of the wide participation and diversity of plays produced, certain rules and guidelines have been adopted to ensure safety, allow for equity, satisfy legal standards, and make the running of the contest practical. These rules can be modified to achieve positive outcomes and improved educational results. Changes in the rules of a UIL contest are in accordance with stated educational objectives of the UIL. Occasionally, however, modifications in procedures raise questions. The problem of this study was to determine, from the perceptions of administrators and teachers, whether significant modifications in the rules and policies for the UIL One-Act Play Contest over a time span of 20 years have had impacts on the goals and procedures of the contest. The study utilized a qualitative approach through historical analysis and a survey to ...
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Musical Arrangements and Questions of Genre: A Study of Liszt's Interpretive Approaches

Musical Arrangements and Questions of Genre: A Study of Liszt's Interpretive Approaches

Date: May 2010
Creator: Van Dine, Kara Lynn
Description: Through his exceptional creative and performing abilities, Franz Liszt was able to transform compositions of many kinds into unified, intelligible, and pleasing arrangements for piano. Nineteenth-century definitions of "arrangement" and "Klavierauszug," which focus on the process of reworking a composition for a different medium, do not adequately describe Liszt's work in this area. His piano transcriptions of Schubert's songs, Berlioz's Symphonie fantastique and the symphonies of Beethoven are not note-for-note transcriptions; rather, they reinterpret the originals in recasting them as compositions for solo piano. Writing about Liszt's versions of Schubert's songs, a Viennese critic identified as "Carlo" heralded Liszt as the creator of a new genre and declared him to have made Schubert's songs the property of cultured pianists. Moreover, Liszt himself designated his work with Berlioz's Symphonie fantastique and the symphonies of Beethoven "Partitions de piano": literally, piano scores. As is well known, concepts of genre in general create problems for musicologists; musical arrangements add a new dimension of difficulty to the problem. Whereas Carl Dahlhaus identifies genre as a tool for interpreting composers' responses to the social dimension of music in the fabric of individual compositions, Jeffrey Kallberg perceives it as a "social phenomenon shared by composers and ...
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Effects of Tasks on Information-Seeking Behavior in a Police Work Environment in the Context of Criminal Intelligence

Effects of Tasks on Information-Seeking Behavior in a Police Work Environment in the Context of Criminal Intelligence

Date: May 2010
Creator: Tatil, Serkan
Description: Although dominant effects of tasks on individuals' information-seeking behavior is accepted by many scholars, a limited number of studies has been conducted to reveal the nature of the relationship between tasks and information-seeking behavior. In their studies, some earlier researchers categorized tasks according to their complexity while others did the same according to the specifications of tasks. Two of the groundbreaking researchers in this area are Katriina Byström and Kalervo Järvelin who contributed to the understanding of the relationship between task complexity and information-seeking behavior. However, their findings also need empirical support for theory growth. In response to this need, this study attempts to test Byström and Järvelin's findings through a research using different research methods and applied in a police work environment. Other than providing empirical support for theory growth, this research is also expected to contribute to the understudied area of police information-seeking behavior. Both qualitative and quantitative data were collected from the participants who came from traffic, homicide, and anti-terrorism divisions of Ankara, Eskisehir, and Kirikkale Police Departments in Turkey. The participants identified terrorism cases as the most complex cases to solve, followed by homicide and traffic accident cases. Differences in the information-seeking behavior of three groups ...
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An Analysis of UNT Commuting Patterns

An Analysis of UNT Commuting Patterns

Date: May 2010
Creator: Waskey, Susan L.
Description: Academic institutions have recently organized to address their campus' greenhouse gas emissions. Along those lines, the University of North Texas (UNT) pledged to minimize the campus' environmental impact, and conducted a transportation survey in May 2009. The analyses confirm that commuting to campus was the second highest source (29%) of UNT's greenhouse gas emissions, following purchased electricity (48%). Students, faculty and staff drive over 89 million miles per year, 84% of which comes from students. Forty‐two percent of student driving trips originate in the primary and secondary core areas surrounding Denton, which are partially served by buses. However, because these core areas are in close proximity to the campus, they contribute only 8% of the total student driving distance. Beyond the Denton core, the inner periphery of Denton County contributes another 22% of driving mileage. Students living in the outer periphery (outside Denton County) contribute the remaining 70% of total driving distance, and carpooling is currently their only alternative.
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A Schenkerian Analysis of Beethoven's E Minor Piano Sonata, Opus 90

A Schenkerian Analysis of Beethoven's E Minor Piano Sonata, Opus 90

Date: May 2010
Creator: Treber, Stefan L.
Description: This thesis examines the history and origins of Beethoven's E minor Piano Sonata and examines the possibility of the programmatic conception of the work. Dedicated to Beethoven's friend Count Moritz Lichnowsky, the sonata may have been inspired by the Count's illicit affair with his future wife, the singer and actress Josefa Stummer. Providing a thorough Schenkerian analysis of both movements, the inner harmonic structure of the composition is revealed and explained. The author also investigates and details the unpublished original analyses of the composition by Heinrich Schenker, Erika Elias, and Hans Weisse. Both English and German language sources are incorporated into a comprehensive examination of Beethoven's Piano Sonata, op. 90.
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Fathom's Edge

Fathom's Edge

Access: Use of this item is restricted to the UNT Community.
Date: May 2010
Creator: Sweeney, Mark
Description: Investigating elements of the creative process in the work of three poets: James Wright, Gjertrud Schnackenberg, and Pegeen Kelly. Each poet deploys a different method for access to those experiences that lie at the edge of accessible language. Each method is discussed and its deployment illustrated. Wright leads us from the sensory world to the supersensual. Schnackenberg makes use of the formal device of the fairy tale. Kelly immerses in the logic of dreams. Drawing on Elaine Scarry's theory of the imagination, the case is made that the poetic act is a dialectic between the poet and the sensory world, in which perception and imagination are equally important.
Contributing Partner: UNT Libraries
Analysis of Graduation Rates for Four-year Colleges: A Model of Institutional Performance Using IPEDS

Analysis of Graduation Rates for Four-year Colleges: A Model of Institutional Performance Using IPEDS

Date: May 2010
Creator: Fung, Terence Yip-hung
Description: Under the George W. Bush U.S. presidential administration, the federal government pushed for greater accountability among institutions of higher education for educational outcomes. Graduation rate is a key performance indicator of institutional accountability. Previous researchers of student attrition focused primarily on the effects of student level factors on student persistence/withdrawal behavior. Recently, researchers put more focus on the effects of institutional characteristics on graduation rates, but most of these studies were exploratory and based on multiple regression models. No institutional model has existed to synthesize their results within a theoretical framework. Such an institutional model is needed to explain the process of student persistence at the institutional level. The purpose of this study was to develop a model of institutional performance in graduation rate for four-year, public and private not-for-profit, Title IV institutions in the United States. This study validated the institutional model based on the IPEDS dataset using the structural equation modeling (SEM) technique. Further group comparison analyses are conducted by fitting the same SEM model to several subgroup datasets based on grouping variables such as control, geographical region and state. Benchmarking analyses were conducted to demonstrate how administrators and policy-makers can use the institutional model to compare the ...
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Modulation of the Coelomic Fluid Protein Profile in the Earthworm, Lumbricus Terrestris, After Exposure to Copper as Copper Sulfate

Modulation of the Coelomic Fluid Protein Profile in the Earthworm, Lumbricus Terrestris, After Exposure to Copper as Copper Sulfate

Date: May 2010
Creator: Herring, Reese
Description: Proteomic techniques were used to analyze the protein profile of earthworm, Lumbricus terrestris, coelomic fluid collected by either whole body dissection method or the coelomic cavity puncture method. Data demonstrated that collection of coelomic fluid using the coelomic cavity puncture method protocol resulted in a 32% reduction, 377 +/- 4.5 vs 253+/- 19.9 (p=0.0007), in the number of individual proteins. It was determined that the coelomic cavity puncture method yielded a "cleaner" preparation, one less contaminated with extraneous proteins from intestinal tissue, gut contents, and body wall materials. This protocol was used in all later studies. The same proteomic techniques were used to evaluate the effects that exposure to Cu (1.0 μg/cm2) as CuSO4 had on the earthworm coelomic fluid profile. Comparison of protein profile from exposed earthworms demonstrated a significant reduction in the number of proteins expressed (184 ± 2.64 vs 253 ±19.9 p=0.0192) when compared to control organisms. Cu exposure also resulted in a modulation of the protein profile with treated earthworms expressing 47 new proteins that were not identified in unexposed worm coelomic fluid. Additionally, 116 proteins found in coelomic fluid collected from normal worms were absent in Cu exposed organisms. Finally, 137 proteins were conserved or ...
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The Vocal Pedagogy of Frederic Woodman Root

The Vocal Pedagogy of Frederic Woodman Root

Date: May 2010
Creator: Grogan, David Christopher
Description: Frederic Woodman Root was a vocal pedagogue and writer of the late nineteenth century. He wrote over eighteen books on vocal pedagogy, and numerous articles on singing. Since his death, most of his works have fallen into obscurity. The purpose of this document was to codify the vocal pedagogy of Frederic Woodman Root, discussing his particularly thorough methodology, and to bring his methods back into the public eye. His method is broken down into the various components of basic musicianship, the General Principle, the Three Vowel Forms, registers, breathing, and agility. Examples from Root's exercises are included and discussed.
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Speaking up: Applying the Theory of Planned Behavior to Bystander Intervention in Racism

Speaking up: Applying the Theory of Planned Behavior to Bystander Intervention in Racism

Date: May 2010
Creator: Hall, Camille Ashley
Description: Because racism remains a significant issue in society, and many victims of racism do not speak up for themselves when faced with racism, it is important to explore how witnesses to racist events may react and intervene upon observing racism toward others. Thus, the current study explored how participants (bystanders) reacted verbally to racist comments made by a confederate during a partner activity, as well as how participants discussed their reactions in post-interviews. Forty college students participated in the study, and three of the participants verbally intervened upon hearing the racist statements. Ajzen's theory of planned behavior was utilized as a framework, and examination of the results indicated that components of the theory as well as social constructions of racism and appropriateness of intervention behaviors affect intervention outcomes. Theoretical, methodological, and practical implications, as well as suggestions for future research are included.
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Development of a Test Blueprint for a Hospitality Management Capstone Course to Measure Programmatic Student Learning Outcomes

Development of a Test Blueprint for a Hospitality Management Capstone Course to Measure Programmatic Student Learning Outcomes

Date: May 2010
Creator: Stevenson, Jackie M.
Description: The purpose of this study was to develop a test blue-print for a hospitality management capstone course to measure programmatic student learning outcomes. A total of 50 hospitality industry professionals and hospitality management faculty were interviewed through focus group discussions, and a post-focus group survey was conducted to determine a weighted percentage for each of the nine determined content domains. A test blueprint was developed from the weighted proportions determined by this study and a process by which other educational institutions could follow to establish a consistent and accurate evaluation method for a capstone course was described.
Contributing Partner: UNT Libraries
"Among Waitresses": Stories and Essays

"Among Waitresses": Stories and Essays

Date: May 2010
Creator: Hobbs, Jessica
Description: The following collection represents the critical and creative work produced during my doctoral program in English. The dissertation consists of Part I, a critical preface, and Part II, a collection of seven short stories and two nonfiction essays. Part I, which contains the critical preface entitled "What to Say and How to Say It," examines the role of voice in discussions of contemporary literature. The critical preface presents a definition of voice and identifies examples of voice-driven writing in contemporary literature, particularly from the work of Mary Robison, Dorothy Allison, and Kathy Acker. In addition, the critical preface also discusses how the use of flavor, tone, and content contribute to voice, both in work of famous authors and in my own writing. In Part II of my dissertation, I present the creative portion of my work. Part II contains seven works of short fiction, titled "Among Waitresses," "The Lion Tamer," "Restoration Services," "Hospitality," "Blood Relation," "Managerial Timber," and "Velma A Cappella." Each work develops a voice-driven narrative through the use of flavor, tone, and content. Also, two nonfiction essays, titled "Fentanyl and Happy Meals" and "Tracks," close out the collection. "Fentanyl and Happy Meals" describes the impact of methamphetamine addiction ...
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The Influence of Japanese Composers on the Development of the Repertoire for the Saxophone and the Significance of the Fuzzy Bird Sonata by Takashi Yoshimatsu

The Influence of Japanese Composers on the Development of the Repertoire for the Saxophone and the Significance of the Fuzzy Bird Sonata by Takashi Yoshimatsu

Date: May 2010
Creator: Hanafusa, Chiaki
Description: The history of the saxophone and its development as a performance medium in Japan is short when compared with other European countries and the United States. In this short history, the saxophone performance level in Japan has increased dramatically. At the same time, compositions for the saxophone by Japanese composers have gained more popularity in the world as can be seen in the program of the World Saxophone Congress and the North American Saxophone Alliance conference. The saxophone history in Japan, including contributions of Arata Sakaguchi (1910-1997), Ryo Noda (b.1948), and Nobuya Sugawa (b.1961), is discussed in order to understand the increase of performances of pieces for saxophone by Japanese composers. The success of many original compositions, especially those that incorporate the synthesis of Eastern and Western music, is another significant element examined in this document. Yoshimatsu approaches music for classical saxophone as a new genre. He seeks all possible sounds that the saxophone can create - beautiful tone to "noise like" - in his compositions. The blending of other musical styles in one piece is one of Yoshimatsu's compositional styles, which can be observed in Fuzzy Bird Sonata; however, he does not limit himself to a single style. This ...
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Présentations de la Grammaire et Représentations du Discours Dans les Manuels de Français Publiés aux États-Unis: une Étude Diachronique

Présentations de la Grammaire et Représentations du Discours Dans les Manuels de Français Publiés aux États-Unis: une Étude Diachronique

Date: May 2010
Creator: Grall, Christophe
Description: This study partially replicates and re-explores specific dimensions of a textbook analysis of the presentation and use of specific grammatical elements and sociolinguistic variants in textbooks published in the United States for learners of French. Authenticity is situated as a central construct in the analysis of interrogatives, relative pronouns, and the negative particle ne in selected textbooks and ancillary materials. The findings reveal that little progress has been made over the past twenty years in integrating authentic representations of discourse into French-as-a-foreign-language textbooks.
Contributing Partner: UNT Libraries
A Case Study of Undergraduate Course Syllabi in Taiwan

A Case Study of Undergraduate Course Syllabi in Taiwan

Date: May 2010
Creator: Tung, Yao-Tsu
Description: Higher education in Taiwan has been influenced by U.S. and Western practices, and syllabi represent one means to verify this. However, limited research exists in Taiwan on course syllabi and on similarities of syllabi with practices in other countries. In the U.S. as the paradigm shifted from teaching to learning and to the learning-centered context, scholars argued that syllabi should be learning-centered. Given the assumption that higher education in Taiwan is similar to U.S. higher education and the call for a learning-centered context, this qualitative research examined 180 undergraduate syllabi at a public university in Taiwan with a (traditional) syllabus component template and a learning-centered syllabus component template derived from the literature in the U.S. to describe (1) the contents of syllabi, and (2) the extent that syllabi in Taiwan were congruent to U. S. syllabus component templates. Syllabi at this university were highly congruent with the (traditional) syllabus component template and were congruent at the medium level with the learning-centered component template. About 90% of syllabi included 8 of 10 major components. Additional findings included: 70% of faculty were male, and 30% were female; more than 75% of the faculty earned their doctoral degrees from the United States or ...
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Jeans, Boots, and Starry Skies: Tales of a Gay Country-and-Western Bar and Places Nearby

Jeans, Boots, and Starry Skies: Tales of a Gay Country-and-Western Bar and Places Nearby

Access: Use of this item is restricted to the UNT Community.
Date: May 2010
Creator: Gay, Wayne Lee
Description: Fourteen short stories, with five interspersed vignettes, describe the lives of gay people in the southwestern United States, centered around a fictional gay country-and-western bar in Dallas and a small town in Oklahoma. Various characters, themes, and trajectories recur in the manner of a short story cycle, as explained in the prefatory Critical Analysis, which focuses on exemplary works of James Joyce, Ernest Hemingway, William Faulkner, Shirley Jackson, Italo Calvino, Yevgeny Kharitonov, and Louise Erdrich.
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Political Identity of First-Year College Students: An Analysis of Student Characteristics Using Cooperative Institutional Research Program (CIRP) Data

Political Identity of First-Year College Students: An Analysis of Student Characteristics Using Cooperative Institutional Research Program (CIRP) Data

Date: May 2010
Creator: Mulberry, Stella L.
Description: This quantitative study utilized secondary self-reported data from the 2008 administration of the Cooperative Institutional Research Program (CIRP) Freshman Survey from two Texas public universities to investigate the pre-college demographic, academic, attitude, behavioral, and familial factors that may relate to students' self-reported political identities. The study design was correlational regarding the relationship of the demographic, academic, attitude, behavioral, and familial independent variables to the dependent variable of the students' political identities. ANOVA main effects for the independent variables were calculated, and statistical significance required the p < .05 level. The statistically significant demographic factors were native English-speaking status; enrollment status; citizenship status; religious preference; and race. The statistically significant academic factor was intended major. The statistically significant attitude factors were opinions regarding social issues such as criminal rights; abortion rights; the death penalty; the legalization of marijuana; homosexual relationships and same-sex marriage; racial discrimination; income taxes; affirmative action; military spending and voluntary military service; gun control; the environment; national health care; immigration; personal success; political dissent; and free speech. Other statistically significant attitude factors related to personal goals of making artistic and scientific contributions; being politically influential and politically knowledgeable; raising a family; participating in environmental programs and community action ...
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Virulence Factor Production in PyrE Mutants of Pseudomonas Aeruginosa

Virulence Factor Production in PyrE Mutants of Pseudomonas Aeruginosa

Date: May 2010
Creator: Niazy, Abdurahman
Description: It has been shown previously in our lab that mutations in the pyrimidine pathway reduced the ability of Pseudomonas aeruginosa to produce virulence factors. Knockout mutations in pyrB, pyrC and pyrD genes of the pyrimidine pathway showed that virulence factor production was decreased. Pyoverdin, pyocyanin, hemolysin, iron chelation, motility, and adherence are all considered virulence factors. Here I further investigate the effects of mutations in the pyrimidine pathway by studying a pyrE mutant. I studied the effect of the pyrE mutation on the production of the above virulence factors. Just like the effect of pyrB, pyrC and pyrD mutations,the pyrE mutation also showed that the bacteria were deficient in producing virulence factors when compared to the wild type. The broader impact of this research would be the possibility of finding drugs that could treat patients infected with P. aeruginosa and possibly extend the lives of chronically infected patients with cystic fibrosis.
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The Determinants and Consequences of Empathic Parenting: Testing an Expansion of Belsky's Model of Parenting Using SEM

The Determinants and Consequences of Empathic Parenting: Testing an Expansion of Belsky's Model of Parenting Using SEM

Date: May 2010
Creator: Morse, Margaret K.
Description: An understanding of factors that enhance empathic parenting behaviors is of considerable importance to the study of child development and to the development of parenting interventions to promote child adjustment. Moreover, gaining a better understanding of the factors that predict empathic parenting with older children is of interest since most research examining parental empathy focuses on infants. These were the goals of the current study. Guided by Belsky's 1984 process model of the determinants of parenting that impact child development, an expanded model of the determinants of parenting is proposed that includes various parent, child, and contextual factors of influence. Using data from a community sample, a partial least squares path analysis approach was employed to test the model's strength in predicting empathically attuned parenting with children ages 5 to 10 years and, ultimately, the child's psychoemotional functioning. Results support the expanded model; however, a reduced model was found to be superior and revealed unique relationships between the determinants of parenting. Specifically, a parent's psychoemotional functioning and childrearing beliefs and attitudes were found to be critical to the parent's ability to engage in empathic parenting behaviors. Other parent factors such as the parent's developmental history of abuse, maladaptive personality traits, ...
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A Comparative Analysis of the 1915 and 1919 Versions of Symphony No. 5 in E-flat Major, op. 82 by Jean Sibelius

A Comparative Analysis of the 1915 and 1919 Versions of Symphony No. 5 in E-flat Major, op. 82 by Jean Sibelius

Date: May 2010
Creator: Norine, John Richard, Jr.
Description: The initial composition of the Fifth Symphony in E-flat Major, Op. 82 was undertaken as a commission to celebrate the composer's fiftieth birthday. Unhappy with the initial efforts, two revisions were then performed; the first was in 1916 and the final revision in 1919. Despite the larger form of the work seeming to have been changed between the 1915 and 1919 versions, the smaller gestures of thematic expression in both versions remained similar. On the surface, it had appeared that the composer had eliminated a movement, changing the 1919 version into a three movement form. This view was not challenged by the composer at the time, and since the earlier versions had either been withdrawn or destroyed, there was no way to compare the original efforts to the final product until recently. In comparing the 1919 version to the original, a definite strong parallel can be seen between the two - despite the changes to form, rearrangement of melodic material, and the seemingly different number of movements. However, the parallel is enough that the 1915 version can be a guide to classifying the 1919 version, an act that has eluded many scholars since the 1920s. Most importantly, comparing the two ...
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The Effects of Jackpots on Responding and Choice in Two Domestic Dogs

The Effects of Jackpots on Responding and Choice in Two Domestic Dogs

Date: May 2010
Creator: Muir, Kristy Lynn
Description: The current study investigated the impact of delivering a jackpot on response rate and response allocation in two domestic dogs. For the purpose of this research, a jackpot was defined as a one-time, within-session increase in the magnitude of reinforcement. Two experiments were conducted to investigate the effects of delivering a jackpot in both single-operant and concurrent schedule procedures. Experiment 1 investigated the impact of a one-time, within-session increase in the magnitude of reinforcement on response rate in a single-operant procedure. Results of Experiment 1 showed no clear change in response rate after the delivery of the jackpot. Experiment 2 investigated the impact of a one-time, within-session increase in the magnitude of reinforcement on response allocation in a concurrent schedule procedure. Results of Experiment 2 showed an increase in response allocation to the jackpotted contingency in both subjects. These results suggest that a jackpot, as defined here, has no effect in single-operant procedures while having an effect in concurrent schedule procedures. These effects are similar to those reported in the magnitude of reinforcement literature.
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Maleic anhydride grafted polypropylene coatings on steel: Adhesion and wear.

Maleic anhydride grafted polypropylene coatings on steel: Adhesion and wear.

Date: May 2010
Creator: Mahendrakar, Sridhar
Description: Polymeric coatings are being used in a growing number of applications, contributing to protection against weather conditions and localized corrosion, reducing the friction and erosion wear on the substrate. In this study, various polypropylene (PP) coatings were applied onto steel substrates by compression molding. Chemical modification of PP has been performed to increase its adhesion to metallic surfaces by grafting of maleic anhydride (MAH) onto PP in the presence of dicumyl peroxide (DCP). Influence of different concentrations of MAH and DCP on the properties of resulting materials have been examined. The coated steel samples are characterized by scanning electron microscopy (SEM), shear adhesion testing, FTIR and tribometry. The coatings with 3 wt. % MAH have shown the maximum adhesion strength due to maximum amount of grafting. The wear rates increased with increasing the amount of MAH due to simultaneous increase in un-reacted MAH.
Contributing Partner: UNT Libraries
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