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1,966 Matching Results
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9-Lipoxygenase Oxylipin Pathway in Plant Response to Biotic Stress
The activity of plant 9-lipoxygenases (LOXs) influences the outcome of Arabidopsis thaliana interaction with pathogen and insects. Evidence provided here indicates that in Arabidopsis, 9-LOXs facilitate infestation by Myzus persicae, commonly known as the green peach aphid (GPA), a sap-sucking insect, and infection by the fungal pathogen Fusarium graminearum. in comparison to the wild-type plant, lox5 mutants, which are deficient in a 9-lipoxygenase, GPA population was smaller and the insect spent less time feeding from sieve elements and xylem, thus resulting in reduced water content and fecundity of GPA. LOX5 expression is induced rapidly in roots of GPA-infested plants. This increase in LOX5 expression is paralleled by an increase in LOX5-synthesized oxylipins in the root and petiole exudates of GPA-infested plants. Micrografting experiments demonstrated that GPA population size was smaller on plants in which the roots were of the lox5 mutant genotype. Exogenous treatment of lox5 mutant roots with 9-hydroxyoctadecanoic acid restored water content and population size of GPA on lox5 mutants. Together, these results suggest that LOX5 genotype in roots is critical for facilitating insect infestation of Arabidopsis. in Arabidopsis, 9-LOX function is also required for facilitating infection by F. graminearum, which is a leading cause of Fusarium head …
Date:
May 2012
Creator:
Nalam, Vamsi J.
System:
The UNT Digital Library
An Evaluation of the Effects of Two Different Role Play Formats on the Outcomes of a Parent Training Curriculum
The current study was designed to replicate and extend previous research on the effectiveness of behavioral parent training. Specifically, the effectiveness of the Behavior Management and Parenting Services (BMAPS) curriculum in teaching parents to exhibit a set of parenting skills and respond accurately to a multiple choice examination about positive parenting techniques was evaluated. In addition, the curriculum was revised so that the relative effectiveness and acceptability of two role play formats could be assessed. The outcomes of the study showed an improvement in the participants' ability to identify correct answers on a multiple choice examination and apply the parenting skills taught in class within a role play format; results pertaining to the efficacy of each role play format were less conclusive.
Date:
December 2009
Creator:
Carlson Litscher, Barbara J.
System:
The UNT Digital Library
Toward a Rationale for Music Education in the Public School Context Framed with both Progressive and Essentialist Considerations: Operationalizing the Ideas of William Chandler Bagley
In music education, aesthetic education and praxial music education serve as two major, guiding philosophical frameworks, yet supporters of each often conflict with one another. Furthermore, both are slightly problematic with respect to the specific context of the public school. Each framework is primarily music-based, however, music education has existed in the wider context of general education since the 1830s. Given the recent core-status designation for music education, as part of all fine arts, in the reauthorization of the Elementary and Secondary Education Act, a framework from general education that supported music education could offer benefits for the domain. However, the wider context of general education is messy as well. Two groups occupy most of the space there, and remain locked in a fundamental disagreement over the purpose of a formal education. The progressive educators, historically framed by Dewey and Thorndike, contend that education functions as societal improvement. In contrast, the essentialists contend that education functions as cultural transmission. Therefore, a more specific need for music education involves selecting a framework from general education that resolves this conflict. The writings of William Chandler Bagley indicate that he balanced both considerations of a formal education while also advancing his notion of …
Date:
May 2016
Creator:
Price, Benjamin J., 1980-
System:
The UNT Digital Library
The Effects of Listening Skills Instruction on Students' Academic Performance
Although it is widely assumed that listening is among the most important learning skills (Wolvin & Coakley, 1988), an examination of the literature indicates that it has been woefully neglected as subject matter in schools. Listening has also been neglected as an area of research. Surveys have been conducted to see if listening is being taught or can effectively be taught, but little evidence exists to suggest that effectively teaching listening improves students' academic performance. This study investigated the relationship between listening skills instruction and academic performance among university students. The purpose was to determine if teaching university students comprehensive listening skills improves their academic performance. It was assumed that listening can be effectively taught. The goal of the study was to compare 75 students who were enrolled in a listening course to a similar group of 75 students not enrolled in a listening course. The students were compared on the basis of grade point improvement the semester after the experimental group had completed the listening course. The t test was chosen because it can be used for testing the significance of the difference between the means of two independent samples. The grade point averages of the two groups were …
Date:
May 1993
Creator:
Mangrum, C. W. (Clifton William)
System:
The UNT Digital Library
Humanism and the Artist Raphael: a View of Renaissance History Through his Humanist Accomplishments
The thesis advances the name of Raphael Santi, the High Renaissance artist, to be included among the famous and highly esteemed Humanists of the Renaissance period. While the artistic creativity of the Renaissance is widely recognized, the creators have traditionally been viewed as mere craftsmen. In the case of Raphael Santi, his skills as a painter have proven to be a timeless medium for the immortalizing of the elevated thinking and turbulent challenges of the time period. His interests outside of painting, including archaeology and architecture, also offer strong testimony of his Humanist background and pursuits.
Date:
August 1991
Creator:
Miller, Douglas W. (Douglas William)
System:
The UNT Digital Library
Effect of Modern Training Techniques on Economically-Disadvantaged Homeless People
This study examined a segment of the homeless population who participated in a jobs training program. The research investigated the effect of socioeconomic status, self-esteem, and locus of control on the clients in getting and keeping jobs. The training was a comprehensive 36-day treatment dealing with three major areas: (a) how to get a job, (b) how to keep a job, and (c) how to develop life-coping skills. A quasi-experimental research design was used for testing by t-tests, two-by-two repeated-measured anova, chi-square tests, and regression analysis. The findings showed that high socioeconomic status clients demonstrated higher self-esteem and internal locus of control than low socioeconomic status clients at the start of the treatment. The treatment had a significant effect on both groups with an increase in self-esteem and internal locus of control and a decrease in both external locus of control dimensions of powerful others and chance. The treatment had a greater effect on the low socioeconomic status clients than on the high socioeconomic status clients on increases in self-esteem and locus of control—internal. Both groups were successful in finding jobs, with 79% for high socioeconomic status clients and 74% for low socioeconomic status clients having jobs at the end …
Date:
August 1990
Creator:
Frankenberger, John J. (John Joseph)
System:
The UNT Digital Library
Sales Forecasting Accuracy Over Time: An Empirical Investigation
This study investigated forecasting accuracy over time. Several quantitative and qualitative forecasting models were tested and a number of combinational methods was investigated. Six time series methods, one causal model, and one subjective technique were compared in this study. Six combinational forecasts were generated and compared to individual forecasts. A combining technique was developed. Thirty data sets, obtained from a market leader in the cosmetics industry, were used to forecast sales. All series represent monthly sales from January 1985 to December 1989. Gross sales forecasts from January 1988 to June 1989 were generated by the company using econometric models. All data sets exhibited seasonality and trend.
Date:
May 1991
Creator:
Zbib, Imad J.(Imad Jamil)
System:
The UNT Digital Library
Predicting Stress in Intensive Care Nurses
The problem of this study was to determine whether or not the variables locus of control, perceived anxiety, anxiety proneness, nursing experience and intensive care experience were better than chance predictors of job stress in intensive care nurses. The study was conducted using 200 volunteer nurses (RN's) who worked in the Intensive Care Units of two major hospitals in a large metropolitan area. All subjects were administered Spielberger's State-Trait Anxiety Inventory, Rotter Internal-External Locus of Control Scale and the Nursing Stress Scale as well as a demographic questionnaire. Multiple Regression Analysis was used to determine the predictive value of the characteristic variables to job stress and to determine the most efficient predictive model possible using these variables.
Date:
May 1984
Creator:
Freeman, Stephen J. (Stephen Joseph)
System:
The UNT Digital Library
Rain and Diagonal Light: Nature Imagery in the Novels of John Cheever
John Cheever uses nature imagery, particularly images of light and water, to support his main themes of nostalgia, memory, tradition, alienation, travel, and confinement in his five novels. In the novels these images entwine and intersect to reveal Cheever's vision of an attainable earthly paradise comprised of familial love and an appreciation of the beauties and strengths of the natural world.
Date:
December 1987
Creator:
Baker, Cynthia J. (Cynthia Jane)
System:
The UNT Digital Library
Mistrust Level and Attitudes Toward Seeking Professional Psychological Help
This study explored the relationship between cultural mistrust level and attitudes toward seeking professional psychological help. It was hypothesized that Blacks with high levels of cultural mistrust, when compared to those with low levels, would show less favorable attitudes toward seeking formal help for psychological problems. Black students were administered the Cultural Mistrust Inventory, Help-Seeking Attitude Scale, Reid-Gundlach Social Service Satisfaction Scale, and Opinions About Mental Illness Scale. Using a 2 (gender) X 2 (mistrust level) MANCOVA, a main effect for the factor of mistrust level was found along with a mistrust level by gender interaction. Students with higher levels of cultural mistrust were found to hold less favorable attitudes toward seeking professional psychological help when compared to students with lower levels of cultural mistrust.
Date:
August 1989
Creator:
Nickerson, Kim J. (Kim Jung)
System:
The UNT Digital Library
Adult Day Services: State Regulatory and Reimbursement Structure
As the need for community care increases, complete and up-to-date information about organizational structure is crucial to making appropriate decisions about the expansion of adult day services. The absence of uniform national policies results in states and communities being relegated to balancing limited funds with the demand for adult day services, and in many areas, the lack of adult day care centers altogether. This study provides an overview of the types of state reimbursement, the availability of different funding sources, and the utilization of the sources in various states.
Date:
May 1996
Creator:
Weaver, Jan W. (Jan Wilkerson)
System:
The UNT Digital Library
Hypnotic Susceptibility as a Function of Information Processing
Hypnotic susceptibility, often regarded as a relatively stable individual characteristic, has been found to be related to the personality dimension of absorption. To test the hypothesis that this relationship is a function of the nature of the sensory response to stimulus events and the development of cognitive models pursuant to the processing of that information, a group of hospitalized, chronic pain patients were assessed on the following dimensions: absorption, clinical hypnotic responsiveness, cognitive resistance to interference, and visual automatization.
Date:
December 1981
Creator:
Magnavito, Frederick J. (Frederick James)
System:
The UNT Digital Library
Receptivity to Dissonant or Consonant Information Via Taped Media with Self-Esteem as a Variable in Counseling Classes
The problem of this study was to determine through the use of taped media receptivity to dissonant or consonant information and to appraise those conditions which bring about change in attitude in light of dissonance theory.
Date:
August 1970
Creator:
Booth, Dorothy J. (Dorothy Johnson)
System:
The UNT Digital Library
Word Order and Style in the Old English "Apollonius of Tyre"
The Old English Apollonius of Tyre survives as only a fragment of a popular medieval romance which is recorded in numerous Latin manuscripts. Approximately half the story is missing; therefore, studies of this prose romance are usually restricted to linguistic and stylistic analyses. Hence this study focuses on the word order of phrases and clauses and on features of style apparent in the Old English version, with comparison to the Latin source where significant divergences occur.
Date:
August 1983
Creator:
Simpson, Dale W. (Dale Wilson)
System:
The UNT Digital Library
At Once in All its Parts: Narrative Unity in the Gospel of Mark
The prevailing analyses of the structure of the Gospel of Mark represent modifications of the form-critical approach and reflect its tendency to regard the Gospel not as a unified narrative but as an anthology of sayings and acts of Jesus which were selected and more or less adapted to reflect the early Church's theological understanding of Christ. However, a narrative-critical reading of the Gospel reveals that the opening proclamation, the Transfiguration, and the concluding proclamation provide a definite framework for a close pattern of recurring words, repeated questions, interpolated narrative, and inter locking parallels which unfold the basic theme of the Gospel: the person and work of Christ.
Date:
December 1988
Creator:
Kevil, Timothy J. (Timothy Jack)
System:
The UNT Digital Library
Strategic Planning in Higher Education: A Study of Application in Texas Senior Colleges and Universities
The problem with which the four-phase descriptive study was concerned is the extent of application of strategic planning by senior colleges and universities in Texas. The purpose was to analyze and describe the status of the planning based on the perceptions of the respondents and a specific set of characteristics validated by twenty experts.
Date:
May 1987
Creator:
Harris, Shirlene W. (Shirlene Wynell)
System:
The UNT Digital Library
An Examination of Two Sextets of Carlos Chávez, Toccata for Percussion Instruments and Tambuco for Six Percussion Players
This lecture-recital deals with the two percussion sextets of Carlos Chavez. Each of the compositions is analyzed by examining compositional characteristics and performance problems. The selection, substitution, and construction of the necessary instruments for performance are explored. Suggestions for stage set-up are also included. The percussion ensemble has become an integral part of most high school and university percussion programs. Much of the literature composed for this medium has not become part of the standard literature. Chlvez's Toccata has obtained its place in the literature—it is one of the most often performed percussion works in the world. Although Tambuco has not yet attained the same status as Toccata, it is, nevertheless, an important contribution to the literature. An attempt is also made to identify the significance of these works by examining some of the early influences on Chavez's compositional style both from his native Mexico, and from other composers writing for percussion ensembles.
Date:
August 1986
Creator:
Peterman, Timothy J. (Timothy James)
System:
The UNT Digital Library
An Experiment on the Interactions of the Learner, HCI, and Training Manual in Learning a Computer Software Package
Training is a vital link between idle or inadequately used software and software seen as a tool. Education can take many forms such as self exploration, CAI, manuals, and formal class room training. The introduction of a computer to a system interjects complex interactions between the computer user and his work environment. Research in this area has been performed by such disciplines as MIS, education, and psychology. A fundamental purpose of this research is to study the interaction of such user variables as cognitive style, demographics, and reading to variables from education and psychology such as advanced organizers, reinforcement, and document layout.
Date:
May 1991
Creator:
Pettingell, Karen J. (Karen Jean)
System:
The UNT Digital Library
A Comparative Study of the Trends of Comedy and Non-Comedy Television Genres and the Public's Attitudes Toward Economic Well-Being, According to a Survey of Gallup Polls, During a Thirty-Year Period from 1955- 1984
This study is concerned with the problem of whether the public's attitudes toward economic well-being could be compared with the types of television programs made popular over a thirty-year period. Two measures were used to determine the public's attitudes toward economic well-being: 1) answers to questions of an economic nature; and 2) answers to questions that asked what was the most important problem. All data were compiled from Gallup polls administered during 1955 through 1984. The television genre data were compiled from sources by Brooks and Marsh, McNeil and Norback and Broadcasting magazine. No association existed among the three measures.
Date:
August 1986
Creator:
Millard, Mary J. (Mary Jennifer)
System:
The UNT Digital Library
A Study of Student Environmental Knowledge and Attitudes in Selected High Schools in the Permian Basin Region of Texas
This study is a partial replication of research conducted by Perkes (1973). The problem in this study is to assess the magnitude of the relationship between student knowledge of the environment, student gender, grade level, and size of school attended; and the level of attitudinal differences between students based upon student gender, grade level, and the size of school that students attend. Methods of data collection include the use of an environmental knowledge and attitude inventory used by Perkes (1973) and modified by Hardy and Fox (1976). This thesis includes an added dimension, a survey of environmental education curricula in the Permian Basin Region of Texas.
Date:
December 1991
Creator:
Manning, Sammy J. (Sammy Joe)
System:
The UNT Digital Library
An Investigation of Selected Factors Affecting Automotive Service Excellence Test Outcome and Job Placement Rate
Under investigation in this study was the effect of ASE certification of automotive technician training programs and other selected factors on ASE test outcome and job placement rate. This research ponders whether the time and money invested in certifying technician training programs is returning desired improvements in this automobile manufacturer's dealer service staff. The study focussed on technicians employed at Chrysler dealerships around the United States. The 2 samples totalling 387 males between the ages of 22 and 30 were drawn from 1,007 graduates of automotive technician training programs. Technicians that completed a formal training program beyond the high school level certified by the National Institute for Automotive Service Excellence (ASE) were compared to others whose training was not certified by ASE. Comparisons were made on the basis of ASE Automobile Technician Test scores and on the length of time from training program completion to employment. This research sought to identify the significance of association between three main predictors - the status of training program ASE certification, work experience and year of training program completion - and the most desirable levels of ASE test outcome (at or above 90% on the ASE test) and job placement rate (immediately following completion …
Date:
August 1995
Creator:
Karbon, Patrick J. (Patrick Joseph)
System:
The UNT Digital Library
High temperature vapor pressure and the critical point of potassium
The vapor pressure was determined from 1600 deg F up to the critical point. The equation Ln P = A + B/T + C Ln T was found to fit the data well, a fourth term D/T/sup 2/ further improved the fit. A novel design was employed in measuring the vapor pressure, which provides a direct determination of the critical pressure, because at all tip temperatures higher than the critical temperature the same breakoff pressure'' is observed. This breakoff'' pressure'', which is produced when the liquid level reaches the critical temperature in its travel along the bore of the tube, is the critical pressure. (58 figures, 50 references) (DLC)
Date:
January 1, 1972
Creator:
Jerez, W. R. & Bonilla, C. F.
System:
The UNT Digital Library
Measurement of the Top Quark Pair Production Cross Section in p anti-p collisions at s**(1/2) = 1.96 TeV
None
Date:
March 1, 2006
Creator:
Otero y Garzon, Gustavo J.
System:
The UNT Digital Library
Development of a Model of Vocational Education Assessment
The purposes of this study were two-fold: to develop a program model for vocational assessment of handicapped students in the public schools that would include information concerning the following components: goals/outcomes, methods, procedures, target populations, and staffing. (2) to compare perceptions of four types of personnel (vocational evaluators, vocational adjustment coordinators, vocational counselors, and educational diagnosticians) concerning the components that should be included in a program model of vocational assessment of handicapped students.
Date:
December 1980
Creator:
Peterson, J. Michael (Jay Michael), 1948-
System:
The UNT Digital Library