This study identified and compared characteristics in the career progression of African-American college presidents of institutions in the continental United States. The study was concerned with personal, educational and professional characteristics of these senior level administrators. From a population of 141 individuals, 73 presidents participated in this study. Frequencies, means, percentages, chi-square, crosstabulations and analysis of variance (ANOVA) were employed in the analysis of data. The level of significance was set at 0.05.

Principal objectives of my research were to: (1) report for the first time that coelomocytes are able to reduce NBT dye and confirm the presence of lysozyme-like activity in earthworm; (2) develop a standard methodology for determination of NBT reduction and lysozyme-like activity in earthworms; (3) compare NBT reduction and lysozyme-like activity in earthworms with those of murine and human cells and fluids; and (4) demonstrate the sensitivity of earthworm NBT reduction and lysozyme-like activity as the assays using matrics in refuse-derived fuel fly ash (RDFF) and CuSO4.

This study examines the association between the attitudes of students toward computers and their knowledge of the ethical uses of computers. The focus for this research was undergraduate students in the Colleges of Arts and Sciences (Department of Computer Science), Business and Education at the University of North Texas in Denton, Texas.

L-shell x-ray production cross sections are presented for Fe, Ni, Cu, Zn, Ga, and Ge by 0.5- to 5.0-MeV protons and by 0.5- to 8.0-MeV helium ions and Ca, Fe, Ni, Cu, and Ge by 0.75- to 4.5-MeV lithium ions. These measurements are compared to the first Born theory and the perturbed-stationary- state theory with energy-loss, Coulomb deflection, and relativistic corrections (ECPSSR). The results are also compared to previous experimental investigations. The high precision x-ray measurements were performed with a windowless Si(Li) detector. The efficiency of the detector was determined by the use of thin target atomic-field bremsstrahlung produced by 66.5 keV electrons. The measured bremsstrahlung spectra were compared to theoretical bremsstrahlung distributions in order to obtain an efficiency versus energy curve. The targets for the measurement were manufactured by the vacuum evaporation of the target element onto thin foils of carbon. Impurities in the carbon caused interferences inthe L-shell x-ray peaks. Special cleansing procedures were developed that reduced the impurity concentrations in the carbon foil, making the use of less than 5 μg/cm^2 targets possible. The first Born theory is seen to greatly overpredict the data at low ion energies. The ECPSSR theory matches the data very well at …

Recent studies of the valuation of real estate have concentrated on the use of hedonic pricing techniques in which the implicit prices of the component characteristics of an asset are inferred from the observed sale price using regression analysis. All of these studies include as explanatory variables one or more locational factors, such as distance to the central business district, as proxies for the effect that location has on the utility of land. In this research, the explicit consideration of the location of real estate in terms of the geographic or Cartesian coordinates (spatial attributes) of observed sales is shown to be a potential substitute for such proxies, either wholly or in part. Such use of spatial attributes could improve the usefulness of the hedonic methodology while at the same time significantly reducing cost and eliminating sources of error.

Cognitive ratings that use bipolar constructs based upon similarity and contrast have been shown to be biased towards the similarity pole in approximately a 62/38 ratio. This bias has also been known to shift in the contrastive direction for individuals who have psychiatric problems. This quantitative measure of cognitive change has a potential for characterizing cognitive changes that occur during the disease process, including recovery from disease. The present study investigated changes in self-aspect ratings and bipolar construct use in adult male veterans who had undergone coronary artery bypass graft surgery. Results indicated that treatment subjects' self-aspect and construct ratings were more negative than controls'. Results also indicated that all subjects rated core interpersonal self-aspects closest to the expected bias, while self-aspects related to cardiac recovery problems were rated in the most contrastive direction. The results finally suggested that the greatest degree of change for the treatment subjects were in emotionally generated constructs. The results suggested a preliminary validation for characterizing cognitive changes in the disease process by measuring shifts in bipolar construct ratings.

Rhizobia are Gram-negative, rod-shaped, soil bacteria with the ability to fix atmospheric nitrogen into ammonia as symbiont bacteroids within nodules of leguminous plant roots. Here, resident Rhizobium plasmids were studied as possible sources of components for the construction of a cloning vector for Rhizobium species.

The lecture was presented on November 18, 1991. This presentation focused on the only two compositions for solo flute and orchestra by Ernest Bloch. Written during the last three years of the composer's life, the pieces are representative of his last style period. While Suite Modale is neobaroque in style, Two Last Poems is much more subjective. Together they represent a synthesis of many of the stylistic characteristics of Ernest Bloch. The musical parameters discussed included form, melody, texture, rhythm, harmony, and expressive devices.

This study surveys pronominal reference marking in active and inverse languages. Active and inverse languages have in common that they distinguish two sets of reference marking, which are referred to as Actor and Undergoer. The choice of one series of marking over another is shown to be semantically and pragmatically determined.

The purpose of this study was to investigate the relationship of word processor use by foreign college writers and their attitudes toward writing, writing revision practices, writing quality, attitudes toward the use of computers, and time spent on computers. The results indicate that students' attitudes toward writing and their perceptions of computer usefulness significantly affected their writing quality. Students with more positive attitudes toward writing and the usefulness of computers tended to produce better quality writing. In addition, the findings indicate that students' writing revision practices significantly affected their attitudes toward writing. Students who revised their writing more frequently tended to have better attitudes toward writing than those who did not. In contrast, students' levels of computer anxiety, computer confidence, computer liking and their writing revision practices did not significantly affect the quality of their writing. Furthermore, the amount of time that students spent on computers did not significantly affect their attitudes toward using computers in writing.

TOL plasmids of Pseudomonas putida encode enzymes for the degradation of toluene and related aromatics. These genes are organized into two operons regulated by the Xy1R and Xy1S transcriptional activators. Previous analysis of the TOL pDK1 catechol-2,3-dioxygenase gene (xy1E) and a comparison of this gene to xy1E from the related TOL plasmid pWW0, revealed the existance of a substantial level of sequence homology (82%).

This research addresses the question of whether there are personal characteristics of purchasing managers that lead them to make decisions regarding buyer-seller partnerships, and supplier sourcing in particular, that may be suboptimal, therefore affecting the performance of the firm. This question warrants study due to the current business environment, in which business firms have been entering into both formal and informal buyer-seller partnerships as a means of surviving in a highly competitive environment.

One- and two-dimensional NMR spectroscopy, including 13C{6Li}{1H} triple resonance techniques, were used to characterize a series of mixed alkyllithium aggregates and to study their exchange processes.

This study proposed (a) to identify the most important attributes of effective college teachers as perceived by students in Taiwan, (b) to investigate the influence of different factors on students' perceived attributes of effective college teachers, and (c) to determine if the students in various Taiwanese teachers colleges differ in their opinions of the most important attributes of effective college teachers. Students identified these factors as attributes of effective college teachers: rapport, effective teaching methods, enthusiasm, fairness, interaction, practical experiences, personality, clarity, and being well-prepared. The fact that sophomore students and freshman students value some factors differently was discovered in this study. In addition, students who have previous teaching experience value all of the important attributes higher than those who do not have teaching experience before they attended teachers colleges.

This study sought to determine female college and university athletic directors' perceptions of position power according to selected job-related characteristics, through development and use of a nineteen-item survey instrument. The study was conducted during the 1991-1992 academic year and consisted of an initial study to determine content validity of the survey instrument, followed by construct validity and reliability determination utilizing a pilot study group of twenty female intercollegiate athletic directors.

The purpose of this study was to create a base of descriptive information about computer applications in the elementary and secondary classrooms of Thailand. To accomplish this task, two forms of questionnaires were developed and administered to a randomly selected sample of 527 school teachers and 94 college instructors throughout the Northeastern area of Thailand. Data were analyzed using a chi-square test, a £-test, and a one-way analysis of variance procedure.

Bacterial toxins have been shown to modify animal cell proteins in vivo with ADPR. Animal cells also contain endogenous enzymes that can modify proteins. Indirect evidence for the existence in vivo of rat liver proteins modified by ADPR on arginine residues has been reported previously. Presented here is direct evidence for the existence of ADP-ribosylarginine in rat liver proteins. Proteins were subjected to exhaustive protease digestion and ADP-ribosyl amino acids were isolated by boronate chromatography.

Cardiovascular responses and tolerance to an orthostatic stress were examined in eight men before and after eight months of endurance exercise training. Following training, maximal oxygen consumption and blood volume were increased, and resting heart rate reduced. Orthostatic tolerance was reduced following training in all eight subjects. It was concluded that prolonged endurance training decreased orthostatic tolerance and this decrease in tolerance appeared associated with attenuated baroreflex sensitivity and alterations in autonomic balance secondary to an increased parasympathetic tone noted with training.

This study examined whether three reserve-based quantity replacement measures and three reserve-based value replacement measures have incremental information content beyond that of historical earnings and its cash and accrual components. This study also examined whether the cash and accrual components of earnings have incremental information content beyond that of earnings.

This study examined the need for, and interest in, preretirement preparation programs for educators (teachers and administrators) in Nakorn Nayok Province, Thailand. All educators were between 46 and 60 years of age and were working in elementary and secondary schools in Nakorn Nayok Province, Thailand. The sample consisted of 333 teachers and 101 administrators. Data were collected by questionnaire survey. Of the returned questionnaires, 81.33% were usable. The results were analyzed by using the Statistical Package for Social Sciences. Results of the study show that elementary and secondary school teachers and administrators in Nakorn Nayok Province, Thailand, would benefit from preretirement preparation programs, but that few programs exist for educators. With all things taken into consideration, individual Thai educators have to be responsible for their retirement preparation knowledge, because the Ministry of Education does not consider preretirement preparation programs important enough to require that they be provided for educators.

The purpose of this study was to examine scanning practices in a developing country by looking at the scanning behavior of executives of Nigerian manufacturing firms. Specifically, this study examined the decision maker's perception of environmental uncertainty (PEU), the frequency and degree of interest with which decision makers scan each sector of the environment, the frequency of use of various sources of information, the number of organizational adjustments made in response to actions of environmental groups, and the obstacles encountered in collecting information from the environment.

The research was designed to test the hypothesis that significant differences exist between Hispanic and non-Hispanic students respecting background characteristics and reasons for enrollment in selected two-year colleges. The findings led to firm conclusions regarding the need for educational institutions to provide remedial and tutorial services, liberal financial aid, culturally sensitive institutional ambience, diversity in faculty, counselors, and staff, and instructional and student development programs responsive to the cultural diversity of all students.

This study examined the impact of the ceiling test write-off on the stock prices of affected full cost (FC) oil and gas firms.

In this dissertation, we investigate how commonsense reasoning can be formalized by using extended logic programs. In this investigation, we first use extended logic programs to formalize inheritance hierarchies with exceptions by adopting McCarthy's simple abnormality formalism to express uncertain knowledge. In our representation, not only credulous reasoning can be performed but also the ambiguity-blocking inheritance and the ambiguity-propagating inheritance in skeptical reasoning are simulated. In response to the anomalous extension problem, we explore and discover that the intuition underlying commonsense reasoning is a kind of forward reasoning. The unidirectional nature of this reasoning is applied by many reformulations of the Yale shooting problem to exclude the undesired conclusion. We then identify defeasible conclusions in our representation based on the syntax of extended logic programs. A similar idea is also applied to other formalizations of commonsense reasoning to achieve such a purpose.