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The Effects of Task-Based Documentation Versus Online Help Menu Documentation on the Acceptance of Information Technology

Description: The objectives of this study were (1) to identify and describe task-based documentation; (2) to identify and describe any purported changes in users attitudes when IT migration was preceded by task-based documentation; (3) to suggest implications of task-based documentation on users attitude toward IT acceptance. Questionnaires were given to 150 university students. Of these, all 150 students participated in this study. The study determined the following: (1) if favorable pre-implementation attitudes toward a new e-mail system increase, as a result of training, if users expect it to be easy to learn and use; (2) if user acceptance of an e-mail program increase as expected perceived usefulness increase as delineated by task-based documentation; (3) if task-based documentation is more effective than standard help menus while learning a new application program; and (4) if training that requires active student participation increase the acceptance of a new e-mail system. The following conclusions were reached: (1) Positive pre-implementation attitudes toward a new e-mail system are not affected by training even if the users expect it to be easy to learn and use. (2) User acceptance of an e-mail program does not increase as perceived usefulness increase when aided by task-based documentation. (3) Task-based documentation is not more effective than standard help menus when learning a new application program. (4) Training that requires active student participation does not increase the acceptance of a new e-mail system.
Date: May 1999
Creator: Bell, Thomas

Parents' Understanding of Developmentally Appropriate Practice in Early Childhood Education

Description: The intent of this study was to determine what understanding and knowledge parents had of developmentally appropriate practice (DAP). The study examined whether the beliefs of parents who enrolled their children in a National Association for the Education of Young Children (NAEYC) accredited program had any impact on their expectations for a philosophy and curriculum that is centered around DAP. In addition, the study examined whether parents' understanding of DAP changed when their children transitioned from infant and toddler programs, to preschool. The study group consisted of parents with children in two privately owned NAEYC accredited centers in 1998 (N=131). Results from parent reports indicated a high level of parent knowledge regarding DAP.
Date: May 1999
Creator: Grebe, Julie M.

Secondary Traumatic Stress Disorder in the Therapists from the Oklahoma City Bombing

Description: Little empirical research has been done to examine the effects that working with traumatized individuals has had on their therapists. It is known that mental health professionals often do suffer ill effects, especially symptoms of secondary traumatic stress disorder. The present investigation tested predictors of secondary traumatic stress disorder in the therapists who provided services for the Oklahoma City bombing. Predictors were therapist social network involvement, years of counseling experience, and amount of self-reported empathy experienced from others. Indicators of secondary traumatic stress were the Frederick Reaction Index-A, the Compassion Fatigue Self-test for Helpers, and the SCL-90R. Hypotheses were tested using a series of hierarchical multiple regressions. Results demonstrated no significance for years of experience or social network, but perceived empathy accounted for 11% of the variance on the SCL-90 and the Compassion Fatigue Self-test for Psychotherapists with social network and years of experience controlled.
Date: May 1999
Creator: Landry, Lisa Pinkenburg

Marketing Strategies for Bed and Breakfast Operations

Description: The purpose of the study was to determine (a) types of marketing strategies, (b) perceived success of marketing strategies, (c) importance of marketing strategies, (d) amenities offered to consumers, and (e) negatives (problems) in marketing strategies by bed and breakfast owners/operators. A questionnaire to assess areas of concern covered in the research questions was developed. The questionnaire contained closed- and open-ended questions, with nominal, interval, and ratio levels of measurement. The sampling frame included the 1,140 bed and breakfast owners/operators listed in the Texas Hotel Occupancy Tax Accounts Report, first quarter, 1998, as interpreted for this study. A sample of 775 of this population was randomly chosen, using a random numbers table. A response rate of 36% was obtained.
Date: May 1999
Creator: Lee, So Yon

Women Receiving Genetic Counseling for Breast Cancer Risk: Cancer Worry, Psychological Distress, and Risk Recall Accuracy

Description: This follows an earlier study of the same data set, which, through its findings, presented new questions that are investigated in this study. Both studies used a prospective controlled design, wherein women receiving genetic counseling for breast cancer risk were randomized into two groups. Subjects receiving an audiotaped recording of their genetic consultation (tape group) were compared to subjects who also had a genetic consultation but did not receive an audiotaped recording of it (no-tape group). Participants were drawn from attendees at the genetic clinics of two London hospitals and included 115 women with a family history of breast cancer. Cancer worry and psychological distress were assessed before genetic consultation (baseline), and at one- and six-month follow-ups by post. Objective risk was estimated by the geneticist during the consultation, and subjective risk was assessed at one month follow-up. The goals of the current study were to investigate relationships between cancer worry, psychological distress, and recall of genetic risk for breast cancer in a sample of women receiving genetic counseling for breast cancer risk, and to investigate the role sociodemographic variables on cancer worry, psychological distress, or risk recall for these women. Results for this sample of women with a family history of breast cancer found that there were consistent relationships between cancer worry, psychological distress, objective risk, and subjective risk before and after genetic consultation. This suggests that women=s psychological responses are appropriate to their level of cancer risk. There were no differences found between the tape and no-tape groups for objective or subjective risk, or for nearness of recall accuracy or degree of under-/over-estimation. Provision of an audiotaped recording of the genetic consultation did not appear to enhance recall of risk information. The role of sociodemographic variables on the psychological and risk variables assessed in this study was very ...
Date: May 1999
Creator: Wade Walsh, Margo

A Different Drummer: A Chamber Opera

Description: A Different Drummer is a chamber opera adaptation of Donald Davis's story "A Different Drummer" from his collection Listening for the Crack of Dawn, published by August House. The opera lasts about seventy minutes, and calls for a cast of three and an orchestra of sixteen players. It contains a prologue, epilogue and four scenes in a single act. The score is prefaced by a paper describing the musical strategies employed in setting the story as an opera. Three chapters describe the adaptation from short story to opera, the essential musical elements, and details of the application of the musical elements in each scene of the opera. The libretto is presented in the fourth chapter.
Date: May 1999
Creator: Friedman, Arnold Jacob

Paintings and Palaces, or the Lament of the Burger Flipper

Description: The opera is scored for chamber orchestra consisting of one oboe, two Bb clarinets, two horns in F, one trumpet in C, one tenor trombone, two percussionists (playing snare drum, bass drum, tambourine, wood block, triangle, suspended cymbal, crash cymbal, agogo bells, cow bell, brake drum, metal whistle, whip, large gong, Glockenspiel, chimes, timpani in F (low) and C), eight or more violins in two parts, six or more violas in two parts, and eight or more cellos in two parts. The characters are Alejandro Jiminez, a dramatic tenor; the Manager of Burger Palace, a baritone; the Suits 1/Fast Food Workers, a choir (SATB) and the Suits 2/Customers, a second choir (SATB), each ideally consisting of eight vocalists for a total of sixteen; the Daydream Figures, which are mimed parts; the Man with Gun, which is a spoken part. The opera, in one act consisting of six scenes and an interlude, is based on a libretto by the composer. There is only one scene change: from an essentially empty stage to a fast food restaurant in Scene 4. The length of the work is approximately sixty to sixty-five minutes.
Date: May 1999
Creator: Salfen, Kevin McGregor

The Effect of Increased Collaboration Among the Library Media Specialist and School Personnel on Perceptions of the Roles and Responsibilities of the Library Media Specialist

Description: This study measured and explored changes in perceptions of the roles and responsibilities of the library media specialist when the level of collaboration increased. Seven library media specialists targeted four members of their educational communities with whom to increase collaborative activities. Before and after the collaboration began, the library media specialists, the teachers with whom they chose to collaborate, other members from the same educational community, and a control group that did not participate in increased collaboration were given a roles and responsibilities rank-order form. This form was used to measure changes in perceptions regarding the importance of the three roles and selected responsibilities related to the three roles before and after the collaborative experience. The library media specialists and the targeted teachers also kept reflection logs to record factors that enhanced collaboration, factors that inhibited collaboration, and any changes in their teaching style as a result of the collaborative experience. Results indicate that the participating library media specialists themselves experienced the most change. Role identification remains a problem as library media specialists seek to become teaching partners with classroom teachers yet still must keep the library media center aligned with school and district goals and move toward making it an information center that provides information resources for all members of the educational community in an effective, efficient and timely manner. Major enhancers to increased collaboration included flexible scheduling of the library, sharing ideas and resources, partnership in teaching, and student achievement. Major inhibitors included time, wanting to keep things the way they were, and lack of resources. Changes in teaching practice included working with another professional instead of in isolation, integrating many resources into the lesson to provide for the learning needs of all students, the incorporation of technology into the lesson, and an awareness of the roles of ...
Date: August 1999
Creator: Beaird, Marilyn Miller

Comparative Mitochondrial DNA Sequence Diversity in Isolated and Open Populations of Southern Flying Squirrels

Description: Three populations of Southern flying squirrels were studied in the Ouachita Mountains of Arkansas to assess the impact of population subdivision-due to island formation--on the population genetics of Glaucomys volans. One island, one mainland, and one open population were investigated. A 367 nucleotide hypervariable region of mitochondrial DNA was sequenced in individuals from each population. Individuals and populations were compared to assess relatedness. Higher sequence diversity was detected in the open and island populations. One island individual shared characters with both the island and mainland populations. Results support the hypothesis that the mainland population may have reduced gene flow. Also, the island population may have been originally founded by at least two maternal lineages.
Date: August 1999
Creator: Cook, Melaney Birdsong

A Multimedia Atlas of Dissection for Comparative Anatomy of the Vertebrates

Description: Traditional methods of teaching the laboratory course for Comparative Anatomy of the Vertebrates could be improved by applying current computer technology to construct an interactive, multimedial atlas of dissection. Five specimens used in comparative anatomy courses at most institutions were chosen as representative members of the Phylum Chordata: amphioxus, lamprey, dogfish shark, mud puppy, and cat. Specimens were dissected according to the modified method of Wischnitzer, 1993, and each stage was photographed with a Kodak DC120 digital zoom camera. These images were processed on a Power Macintosh 7600 computer with Adobe Photoshop v. 5.0. The atlas was constructed from these images using Macromedia Authorware v. 4.0.3. Each image contains a series of interactive objects that display a highlight and descriptive text as the cursor passes over each object.
Date: August 1999
Creator: Curran, Anthony A.

Harbor: The Act of Autobiography

Description: This written thesis accompanies a sixteen-minute documentary video, Harbor, in which the filmmaker explores her relationship with her father who has suffered a stroke. Detailed accounts of the pre-production, production and post-production of the video allow the reader to understand the challenging and rewarding process of making an autobiographical documentary. Theoretical issues are also discussed, including the validity, criticisms, artistic nature and ethical concerns of autobiographical filmmaking. The filmmaker stresses the universality of her story, and how, despite the film's very personal nature, it is applicable for anyone who has dealt with the illness and/or disability of a parent.
Date: August 1999
Creator: Doeren, Catherine Wallace

Animals-as-Trope in the Selected Fiction of Zora Neale Hurston, Alice Walker, and Toni Morrison

Description: In this dissertation, I show how 20th century African-American women writers such as Zora Neale Hurston, Alice Walker, and Toni Morrison utilize animals-as-trope in order to illustrate the writers' humanity and literary vision. In the texts that I have selected, I have found that animals-as-trope functions in two important ways: the first function of animal as trope is a pragmatic one, which serves to express the humanity of African Americans; and the second function of animal tropes in African-American women's fiction is relational and expresses these writers' "ethic of caring" that stems from their folk and womanist world view. Found primarily in slave narratives and in domestic fiction of the 19th and early 20th centuries, pragmatic animal metaphors and/or similes provide direct analogies between the treatment of African-Americans and animals. Here, these writers often engage in rhetoric that challenges pro-slavery apologists, who attempted to disprove the humanity of African-Americans by portraying them as animals fit to be enslaved. Animals, therefore, become the metaphor of both the abolitionist and the slavery apologist for all that is not human. The second function of animals-as-trope in the fiction of African-American women writers goes beyond the pragmatic goal of proving African-Americans's common humanity, even though one could argue that this goal is still present in contemporary African-American fiction. Animals-as-trope also functions to express the African-American woman writer's understanding that 1) all oppressions stem from the same source; 2) that the division between nature/culture is a false onethat a universal connection exists between all living creatures; and 3) that an ethic of caring, or relational epistemology, can be extended to include non-human animals. Twentieth-century African-American writers such as Hurston, Walker, and Morrison participate in what anthropologists term, "neototemism," which is the contemporary view that humankind is part of nature, or a vision that Morrison would ...
Date: August 1999
Creator: Erickson, Stacy M.

Peer Education: Building Community Through Playback Theatre Action Methods

Description: The primary purpose of this study was to use some of the action methods of playback theatre to facilitate the acquisition of knowledge through the experience of building community. The impact of action methods on group dynamics and the relationship among methods, individual perceptions, and the acquisition of knowledge were analyzed. The researcher suggested that playback theatre action methods provided a climate in which groups can improve the quality of their interactions. The Hill Interaction Matrix (HIM) formed the basis for the study's analysis of interactions. Since the researcher concluded there were significantly more interactions coded in the "power quadrant" after training, the researcher assumed that playback theatre action methods are a catalyst for keeping the focus on persons in the group, encouraging risk-taking behaviors, and producing constructive feedback between members. Based on session summaries, individual interviews, and an analysis of the Group Environment Scale (GES), the training group became more cohesive, became more expressive, promoted independence, encouraged self-discovery, and adapted in innovative ways. The experience of an interconnected community created a space where positive growth could occur. The researcher concluded that the process of community building is intricately connected with a person's ability to make meaning out of experiences. Participants in the study noted several processes by which they acquired new knowledge: (a) knowledge through internal processes, (b) knowledge through modeling, (c) knowledge through experiences, (d) knowledge through acknowledgment and application. Acknowledging and applying knowledge were behaviors identified as risk-taking, communication and active listening, acceptance of diverse cultures and opinions, and building community relations. The study suggested further research in the effects of these methods compared to other learning methods, the effects of these methods on other types of groups, the effects of the leader's relationship to the group, and the long-term effects on group dynamics.
Date: August 1999
Creator: Kintigh, Monica R.

Development of a Coaxiality Indicator

Description: The geometric dimensioning and tolerancing concept of coaxiality is often required by design engineers for balance of rotating parts and precision mating parts. In current practice, it is difficult for manufacturers to measure coaxiality quickly and inexpensively. This study examines feasibility of a manually-operated, mechanical device combined with formulae to indicate coaxiality of a test specimen. The author designs, fabricates, and tests the system for measuring coaxiality of holes machined in a steel test piece. Gage Repeatability and Reproducibility (gage R&R) and univariate analysis of variance is performed in accordance with Measurement System Analysis published by AIAG. Results indicate significant design flaws exist in the current configuration of the device; observed values vary greatly with operator technique. Suggestions for device improvements conclude the research.
Date: December 1999
Creator: Arendsee, Wayne C.

A Descriptive Study of Students Who Were Accepted for Admission at West Texas A&M University But Did Not Enroll

Description: Each year, institutions of higher education devote valuable financial and personnel resources in the hope of enhancing student recruitment and matriculation. The purpose of this study was to examine the demographic characteristics, the factors that influenced students’ decisions to apply for admission to a university, their educational intentions, and their reasons for not enrolling after they had been admitted. The subjects of the study were first-time freshmen accepted for admission to a mid-size, public, southwestern university who did not enroll for the fall 1997 semester. Statistically significant differences were found when comparing no-shows and enrolled students by gender, ethnicity, age, ACT/SAT score, and distance of their hometown from the university. There were more female no-shows, and more males enrolled than females; a greater percentage of no-shows reported the distance of their hometown to be more than 200 miles; and the mean test score for no-shows was higher. Factors important in the college selection process found to be statistically significant among the groups were: a greater percentage of Minorities than Caucasians reported the importance of the financial aid award or a scholarship offer; students living within 100 miles of the campus reported the proximity of the university as important, advice received from current or former students and high school counselors was more important to those living more than 100 miles from the campus. Cost of attendance and scholarships were important to students with the higher test scores. Statistically significant reasons cited by the no-shows for not enrolling were more Minorities than Caucasians reported financial difficulties and job demands; students living farther from the campus reported attending other universities while those living within 100 miles reported attending a community college. Recommendations the university studied could pursue include: developing a program to follow-up on the no-shows, directing more energy at recruiting students living ...
Date: December 1999
Creator: Barton, Mary Edna

Cure Kinetics and Processing Parameters of Neat and Reinforced High Performance Epoxy Resins: Evaluation of Techniques

Description: Kinetic equation parameters for the curing reaction of a commercial glass fiber reinforced high performance epoxy prepreg composed of the tetrafunctional epoxy tetraglycidyl 4,4-diaminodiphenyl methane (TGDDM), the tetrafunctional amine curing agent 4,4’-diaminodiphenylsulfone (DDS) and an ionic initiator/accelerator, are determined by various thermal analysis techniques and the results compared. The reaction is monitored by heat generated determined by differential scanning calorimetry (DSC). The changes in physical properties indicating increasing conversion are followed by shifts in glass transition temperature determined by DSC and temperature-modulated DSC (TMDSC), thermomechanical (TMA) and dynamic mechanical (DMA) analysis and thermally stimulated depolarization (TSD). Changes in viscosity, also indicative of degree of conversion, are monitored by DMA. Thermal stability as a function of degree of cure is monitored by thermogravimetric analysis (TGA). The parameters of the general kinetic equations, including activation energy and rate constant, are explained and used to compare results of various techniques. The utilities of the kinetic descriptions are demonstrated in the construction of a useful time-temperature-transformation (TTT) diagram for rapid determination of processing parameters in the processing of prepregs. Copyright is held by the author, unless otherwise noted. All rights reserved. Files: Thesis.pdf Special Conditions
Date: December 1999
Creator: Bilyeu, Bryan

Counselor Effectiveness and Correlations With Select Demographic Variables for Masters Level Counseling Students

Description: Counselor education programs are charged with the responsibility to train students to be effective counselors. Despite relative consistency in academic and clinical experiences, some students are less effective than others. It was the intent of this research to investigate possible relationships which may exist between students' background and experiences and their levels of demonstrated counselor effectiveness as measured by the Counselor Rating Form - Short Version (CRF-S) and the Supervisor Rated-Counselor Interaction Analysis (SR-CIA). It was hypothesized that counselor effectiveness would be negatively correlated with prior teaching experience and level of religious participation. Data was collected using a demographic survey from masters level counseling students participating in their practicum semester. Counseling tapes from each of the participants were collected towards the end of the semester. These tapes were then rated by doctoral students using the CRF-S and the SR-CIA. The total sample size was 28. Regression analysis was used to investigate the hypotheses. Three models were constructed. The dependent variables used were scores from the CRF-S, the SR-CIA and a third comprised of a normalized composite of CRF-S and SR-CIA termed COMPOSITE. Each model used, as the independent variables, years of teaching experience, and hours of religious participation. Results from regression analysis suggested that a negative correlation existed between counseling effectiveness and years of teaching experience and a positive correlation between counselor effectiveness and hours of religious participation. Statistically significant results were not achieved for any of the models tested. Further investigation was conducted using effect size analysis. Small to medium effect sizes were achieved, however, suggesting that the models were detecting a negative correlation between counselor effectiveness and years of teaching experience, and a positive correlation between hours of religious participation and counselor effectiveness.
Date: December 1999
Creator: Calhoun, Kenneth

Hospitality Students' Attitudes and Behavioral Intentions toward Learning and Using Computer Technology

Description: Following Ajzen/Fishbein's 1980 Theory of Reasoned Action, influences of hospitality students' external variables (age, gender, university classification, and work experience) on computer attitudes, and relationships between computer attitudes and intentions to learn and use computers were tested. A sample of 412 hospitality students completed two measurements: Loyd/Gressard's 1984 Computer Attitude Scale, and Behavioral Intentions to Learn and Use Computers. Males and females had positive computer attitudes. Graduates had more positive computer attitudes. No interaction effect existed between gender and classification. No relationships existed between age and work experience on computer attitudes. Computer attitudes positively correlated with intentions to learn and use computers. Results supported the Theory of Reasoned Action. External variables partially influence attitudes and attitudes influence intentions.
Date: December 1999
Creator: Chuvessiriporn, Suttichai

The Afro-British Slave Narrative: The Rhetoric of Freedom in the Kairos of Abolition

Description: The dissertation argues that the development of the British abolition movement was based on the abolitionists' perception that their actions were kairotic; they attempted to shape their own kairos by taking temporal events and reinterpreting them to construct a kairotic process that led to a perceived fulfillment: abolition. Thus, the dissertation examines the rhetorical strategies used by white abolitionists to construct an abolitionist kairos that was designed to produce salvation for white Britons more than it was to help free blacks. The dissertation especially examines the three major texts produced by black persons living in England during the late eighteenth centuryIgnatius Sancho's Letters of the Late Ignatius Sancho (1782), Ottobauh Cugoano's Thoughts and Sentiments on the Evil of Slavery (1787), and Olaudah Equiano's The Interesting Narrative of the Life of Olaudah Equiano, or Gustavus Vassa, the African (1789)to illustrate how black rhetoric was appropriated by whites to fulfill their own kairotic desires. By examining the rhetorical strategies employed in both white and black rhetorics, the dissertation illustrates how the abolitionists thought the movement was shaped by, and how they were shaping the movement through, kairotic time. While the dissertation contends that the abolition movement was rhetorically designed to provide redemption, and thus salvation, it illustrates that the abolitionist's intent was not merely to save the slave, but to redeem blacks first in the eyes of white Christians by opening blacks to an understanding and acceptance of God. Perhaps more importantly, abolitionists would use black salvation to buy back their own souls and the soul of their nation in the eyes of God in order to regain their own salvation lost in the slave trade. But ironically, they had to appear to be saving others to save themselves. So white abolitionists used the black narratives to persuade their overwhelmingly white audience ...
Date: December 1999
Creator: Evans, Dennis F.

Techniques of Sensual Perception: The Creation of Emotional Pathways

Description: Some artists strive to create artwork that has aesthetic value. If a piece of artwork has the ability to capture the attention of an audience, it must contain strong sensual attributes. Thus, understanding how to design an art form to contain strong sensual attributes may increase the possibility of an aesthetic experience. Since aesthetics is an experience of sensations perceived when in contact with a creative form in any artistic discipline, it is necessary for an artist to understand the nature of the sensual experience. In understanding the sensual experience, artists may be able to create techniques to enhance the aesthetic experience of their work. My video piece, entitled Ararat is a study of methods to enhance the sensual experience. I hope to accomplish this by means of using techniques that optimize an audience's perceptual experience.
Date: December 1999
Creator: Henry, Jon L.

A Qualitative Study of the Use and Value of Financial Performance Indicators in Selected Community Colleges in the State of Texas as Perceived by their Chief Executive Officers

Description: Throughout the United States, colleges and universities are faced with an increasing need for financial funding, while at the same time resources continue to diminish. With the limitations of available funds, community colleges must exhibit efficiencies in the operations of their institutions. External interests, such as governing boards and legislatures, require demonstration of efficient financial management. This evidence is then used to make decisions concerning future financial support for the community college. This study determined if community college chief executive officers use financial performance indicators as provided by the State Auditor's Office and if the chief executive officers of the community colleges value the compilation and the distribution of the financial performance indicators. In the selected colleges, many of the chief executive officers depend on their chief financial officer for understanding and application of financial performance indicators. The performance indicators distributed by the Auditor's Office captured only a snapshot of the college's performance, and failed to fully describe the whole college performance or specific financial events captured by the indicators. Though the indicators had flaws, either through incorrect data or lack of explanation, the CEOs did value their compilation because they provided a means for ‘getting the community college story' to decision makers external to the college.The State Auditor's performance indicators were developed using a university model. Because of the distinct difference in mission between the community college and the university, several of the indicators were not applicable to the community colleges. The CEOs suggested that another set of indicators be developed, using community college input, that would better capture the financial performance of the colleges. The new set of indicators should be simplified and measure only those areas, such as revenues and expenditures, that are truly comparable from one institution to another.
Date: December 1999
Creator: Hase, Karla Luan Neeley

The Luxury of Tears: A Secondary Survivor's Story

Description: As the written accompaniment for The Luxury of Tears, a twelve-minute documentary video exploring the emotional impact of sexual assault on male survivors and their partners, this document examines the visual texts of both the fiction and nonfiction genres. Specifically, I contend that fiction film manufactures male survivorship with regard to rape events in such manner which contributes to the thematization of social silence. Such silence perpetuates the feminization of rape as a social problem, and dissolves the development of male survivor resources. A discussion of production processes, challenges, and resolutions is included.
Date: December 1999
Creator: McKinney, Kelli

Symmetrical Features of Nikolai Medtner's Language: The Grzovaya Sonata, Opus 53 No. 2

Description: Nikolai Medtner's works evidence an intense interest in symmetrical designs. This concern is manifest at all levels, from the large scale proportions of his numerous ingenious sonata forms to the symmetrically constructed themes and motives. Medtner's works include several instances of palindromic themes and periods. Some palindromic contours are achieved through immediate inversion, creating expansive, symmetrical waves. One of Medtner's thumbprints, symmetrical contrary voice-leading, consists of two or more voices which systematically expand or contract in exact mirror fashion. The contrary movement is usually stepwise, and may be either chromatic or diatonic. Occasionally even larger intervals, such as thirds and fourths, are subjected to this favourite mirroring technique. Such symmetrical expansion and contraction often controls the harmonic progression of several consecutive bars. One of the most striking aspects of Medtner's music is his sophisticated harmonic language. He was fascinated with symmetrical harmonic designs, such as the tritone, the French sixth chord, and the octatonic scale, and made endless and increasingly intricate explorations into these stuctures and the ways in which these apparently nontonal, non-hierarchical forms could be coordinated with the fundamental hierarchy of asymmetrical tonal forms, including triads, major and minor scales, and tonic-dominant relations. Medtner's late work, the Grozovaya Sonata, Opus 53 No.2, is the most concentrated and abstract of his works. The themes are built from highly lapidar motives, giving this work an intensely angular, rigorously mathematical character. All the symmetrical hallmarks of Medtner's language are in abundant evidence in this great work. Features include the extensive symmetrical mirroring of the opening section, frequent use of contrary voice leading as a generator of harmonic progression, and constant tritone shifting. Medtner also builds sequential chains based on two more symmetrical forms, the diminished seventh and the augmented triad. Finally, the design of this unique single movement sonata may be ...
Date: December 1999
Creator: Pitts, James L.

The Potential of Coelomocyte Chemotaxis as an Immune Biomarker in the Earthworm, Lumbricus terrestris

Description: Coelomocyte migration responses, both random and chemotatic, were examined in the earthworm Lumbricus terrestris. Coelomocyte random migration patterns towards non-stimulatory, non-chemotatic solutions were described. Migration responses to immunostimulatory agents lipopolysaccharides (LPS), N-formly-methionyl-leucyl-phenylalanine (FMLP), sheep erythrocytes, Saccharomyces cerevisiae, Aeromonas hydrophila, Eisenia fetida and Rhabditis pellio were characterized. Chemotaxis was reported to LPS, FMLP, sheep erythrocytes, S. cerivesae and E. fetida. Bio-indicator potential of chemotaxis is discussed relative to variability in migration responses.
Date: December 1999
Creator: Mota, Jennifer A.