The relationship among eosinophils, lysophospholipase activity and the immune response in animals infected with Trichinella spiralis was studied using in vivo and in vitro techniques. In an in vivo experiment, anti-thymocyte serum (ATS) was administered to mice infected with T. spiralis and its effects on intestinal lysophospholipase (EC 3.1.1.5.) activity, peripheral blood, bone marrow and intestinal eosinophilia were measured in the same experimental animal. The ATS caused a significant temporally related suppression of both the tissue lysophospholipase response and eosinophilia, in all three compartments. These findings support the hypothesis that parasite-induced eosinophilia is the cause of the increased lysophospholipase activity of parasitized tissue and that the responses are thymus cell-dependent. In vitro experiments demonstrated that the eosinophil was the primary inflammatory cell source of lysophospholipase among eosinophils, neutrophils macrophages and lymphocytes. The role of other cells and antigen in the production of the enzyme by the eosinophil was also investigated in vitro• Results demonstrated that eosinophils cultured with both T. spiralis antigen and other leukocytes yielded enzyme activities significantly greater than eosinophils cultured alone or with only antigen. More specific experiments showed that T-lymphocytes were the cells responsible for influencing the eosinophils' lysophospholipase activity in the presence of antigen, and …

The problem investigated by this study was that of understanding types of behaviors exhibited by participants in negotiations processes and impact of behaviors on collective bargaining in Nigeria. The study's three purposes were to describe the nature and extent of interpersonal conflict that occurs in collective bargaining, to determine the consequences that stem from such conflict, and to suggest the behaviors and performances during the face-to-face negotiations that should exist to enhance labor-management relations in Nigerian public education. This study examined behavior in negotiations by using simulation, i.e., a quasiexperimental method. Four outcomes of negotiations--time required to reach agreement, terms of agreements, verbal behavior exhibited during negotiations, and satisfaction derived by negotiators in negotiations—were examined.

This study examines the usefulness of general price level information (GPL) and current cost information (CC) originally provided by SFAS No. 33 as compared to historical cost information (HC) in predicting bankruptcy. The study also examines the usefulness of GPL data versus CC data when each supplements HC data. In addition, this study tests the usefulness of the three types of information systems combined in one model (HC, GPL, and CC) versus HC data in predicting bankruptcy. The study focuses on the predictability of business failure using financial ratios as predictors. A comparison of these predictors is made in order to identify the accounting system that yields a better prediction of bankruptcy. Two multivariate statistical techniques, multiple discriminant analysis (MDA) and logistic regression analysis (LRA), are used to derive the ex—post classification and the ex-ante prediction results. Six functions are developed, based on ratios computed with HC, CC, GPL, the combined HC and GPL, the combined HC and CC, and the combined HC, GPL, and CC. The resulting functions are used to classify 40 firms as failed or nonfailed. The analysis is repeated for three time bases—one, two, and three years before bankruptcy. The main results of the various analyses …

This study analyzes the status and job functions of the 546 elementary school assistant principals in Texas during the 1985-1986 school year. It is concerned with the status of the position and the degree of responsibility assigned to the assistant principal for forty-eight specific job functions in the actual and ideal practice. A sample of 125 assistant principals, 125 supervising principals and a population of 135 superintendents whose districts employ assistant principals were included in the study. All three groups completed the role survey instrument. The results were analyzed by using the one-sample chi-square test to determine whether significant differences existed among the perceptions of the superintendents, principals, and assistant principals at the .01 level. The return rate was 60.8 percent for the assistant principals and principals and 84.6 percent for the superintendents.

This study investigated the relation of the Kaufman Assessment Battery for Children (K-ABC) with the Wechsler Intelligence Scale for Children - Revised (WISC-R) for learning disabled (LD) children, the relation of K-ABC Achievement subtests with other achievement tests, and the relation of verbal and perceptual abilities assessment and the K-ABC. One hundred white, middle to above socioeconomic status (SES), LD students 6 to 12 1/2 years old were administered the K-ABC in addition to the test battery used to identify them. Findings indicated significant differences (2<-01) between WISC-R Full Scale scores and KABC MPC scores, with MPC scores being 3.33 points lower. Significant correlations (2<-01) were found between the following: (a) WISC-R Performance scores and K-ABC Simultaneous scores, (b) K-ABC Sequential and Simultaneous scores, (c) WISC-R Performance and K-ABC Sequential scores, (d) K-ABC Arithmetic and WRAT Arithmetic, and (e) K-ABC Reading Understanding and the following: Woodcock Word Identification, Woodcock Passage Comprehension, WRAT Reading, and Durrell Silent Reading. The study found the MPC correlates higher with tests of perceptual ability than with tests of verbal ability. Results indicate the following: (a) the WISC-R and K-ABC can substitute each other when measuring overall intelligence, (b) the WISC-R and K-ABC do not measure …

The main purpose of this study was to determine the effect of Texas House Bill 72 on equalization of finances in the public school districts of Texas. House Bill 72 is a finance reform bill which was passed by the Texas Legislature during the Summer of 1984. This study involves basically three steps. First, current criteria for equity as defined by school finance "experts" and recent definitive court decisions were determined. Second, financial data from the Texas Education Agency were statistically analyzed for the 1984-1985 school year. Third, the statistical analysis was used to determine if the current Texas school finance plan meets the current criteria for equity. The population used in the study was 1,068 school districts. Based on the findings of this study the following conclusions were drawn. 1. The use of a per capita flat grant by the Texas Public School Finance System contributes to the unequalizing of financial resources available to school districts. 2. School districts with greater property index values are required to exercise very little effort toward the support of their public schools. 3. School districts with high property index values tend to have lower effective tax rates and high per-pupil expenditures. 4. School …

This dissertation deals with the problem of manipulating and storing an image using quadtrees. A quadtree is a tree in which each node has four ordered children or is a leaf. It can be used to represent an image via hierarchical decomposition. The image is broken into four regions. A region can be a solid color (homogeneous) or a mixture of colors (heterogeneous). If a region is heterogeneous it is broken into four subregions, and the process continues recursively until all subregions are homogeneous. The traditional quadtree suffers from dependence on the underlying grid. The grid coordinate system is implicit, and therefore fixed. The fixed coordinate system implies a rigid tree. A rigid tree cannot be translated, scaled, or rotated. Instead, a new tree must be built which is the result of one of these transformations. This dissertation introduces the independent quadtree. The independent quadtree is free of any underlying coordinate system. The tree is no longer rigid and can be easily translated, scaled, or rotated. Algorithms to perform these operations axe presented. The translation and rotation algorithms take constant time. The scaling algorithm has linear time in the number nodes in the tree. The disadvantage of independent quadtrees is …

The purpose of this study was to describe the extent and quality of prior knowledge, transactional nature, and social context of literacy knowledge demonstrated by young mildly handicapped learners. The study was based on current theories of literacy which view literacy growth as part of the total language system development, and ethnographic methods were used to gather and analyze qualitative data. Language and literacy events were observed in three special education classrooms including 43 students ranging in age from 4 years 1 month to 9 years 11 months. Major findings of the study included: (a) The children in this study demonstrated prior literacy knowledge much like that of non-handicapped peers, (b) Demonstrations of oral and written language system transactions decreased after students received formal instruction in reading and writing. And (c) children's ability to interpret print depended greatly on the presence or absence of context with the print.

The purpose of this study is to compare and analyze the teaching of history in teachers colleges in the Metropolitan region and other regions in Thailand. Variables examined in this study include the following: salary, teaching experience, degrees held, the number of graduate credit hours in history, the number of graduate credit hours in education, attendance at professional meetings, the number of publications, membership in professional organizations, the number of hours devoted to course preparations, teaching load, and teaching behaviors. The comparison is based on geographical location of the teachers colleges by region. The survey instrument, after intensive review and validation by selected faculty both in Thailand and the United States, was distributed to the 180 history instructors in the teachers colleges in the six major regions of Thailand. The total number of responses was 138, or 76.7 per cent. The statistical procedures used in the analyses of data include frequency and percentage of responses, a chi square test of independence, t test, the Yates* correction for continuity, and Fisher's Exact Probability Test (2-tailed). The data findings from this study indicate that there is a high degree of similarity between the respondents from the Metropolitan region and other regions' history …

The purpose of this study is to identify and compare the perceptions of practicing teachers and college instructors toward four components of inservice education programs: content, organization, format of presentation, and participant involvement in the teachers colleges in Thailand. The comparison is based on the demographic variables of sex, age, educational background, and teaching experience in the institution. The "In-Service Education Attitude Survey" by Yesuratnam, Basimalla at the University of Illinois at Urbana-Champaign, Urbana, Illinois in 1982 was used to gather data for this study. It was distributed to a sample of 380 practicing teachers and college instructors in 19 randomly selected teachers colleges in Thailand; 368 usable instruments were returned (97.15%). The data were treated to produce numbers and percentages. The t tests for two independent samples were computed to determine any statistically significant differences between the respondent groups of practicing teachers and college instructors, and between the practicing elementary and secondary school teachers. The F tests were also utilized to determine any statistically significant differences among the variables of practicing teachers and college instructors.

This study examines the effect of class discussion as a pre-writing activity on actual writing performance. The experiment was conducted with all the Level 3 and Level 4 students enrolled in the Intensive English Language Institute of North Texas State University in the Spring, 1986 semester. Cochrans C test was performed to test significant differences between groups at the beginning of this test. Multivariate analysis of variance tests were used to determine the treatment effect between and within groups, and a matched t-test was also utilized to analyze the difference within tests. Pearson product moment correlation coefficient was calculated to determine the relationship between the discussion activity score and the actual writing score. Analysis of covariance tests were used to determine which variance of discussion activities had greater effect on the actual writing score.

This study is designed to determine the degree to which female principals and vice-principals in Texas derive job satisfaction from their work and to identify those factors, both negative and positive, which affect the job satisfaction of these principals and vice-principals. A single questionnaire was used to collect the data for this study. Usable questionnaires were returned by 331 vice-principals and 504 principals. These represented 336 school districts throughout the state. Respondents were compared as to their view of their overall job satisfaction, the importance assigned to intrinsic and extrinsic job facets, their satisfaction with intrinsic and extrinsic job facets, and the differences in facet satisfaction connected with various personal characteristics.

Absolute K-shell x-ray cross sections and Auger-electron cross sections are measured for carbon for 0.6 to 2.0 MeV proton incident on CH₄, n-C₄H₁₀ (n-Butane), i-C₄H₁₀ (isobutane), C₆H₆ (Benzene), C₂H₂ (Acetylene), CO and CO₂. Carbon K-shell fluorescence yields are calculated from the measurements of x-ray and Auger-electron cross sections. X-ray cross sections are measured using a variable geometry end window proportional counter. An alternate method is described for the measurement of the transmission of the proportional counter window. Auger electrons are detected by using a constant transmission energy Π/4 parallel pi ate electrostatic analyzer. Absolute carbon K-shell x-ray cross sections for CH₄ are compared to the known results of Khan et al. (1965). Auger-electron cross sections for proton impact on CH₄ are compared to the known experimental values of RΦdbro et al. (1979), and to the theoretical predictions of the first Born and ECPSSR. The data is in good agreement with both the first Born and ECPSSR, and within our experimental uncertainties with the measurements of RΦdbro et al. The x-ray cross sections, Auger-electron cross sections and fluorescence yields are plotted as a function of the Pauling charge, and show significant variations. These changes in the x-ray cross sections are compared …

The purposes of this study were to determine whether brain growth spurts occur in normal pupils and to determine whether there was a uniform difference in head circumference between boys and girls. Subjects were 3,062 normal elementary pupils, grades one through six, from one suburban school district. Fiberglass measuring tapes were used to measure pupils' head circumference. The hypotheses of the study predicted that the relationship between head circumference and age would be linear. Further, it was predicted that the differences in head circumference between boys and girls would be uniform over seven specified ages. The first hypothesis was tested using a test for linear trend and deviation from linear trend using the General Linear Models procedure. The results indicated that there was a significant linear trend between head circumference and age. The test for deviation from the linear trend was not significant. This would suggest that any deviation from a straight line observed in the data can be attributed to chance. It was concluded that since there was no significant deviation from linear trend, it would suggest a continuous growth of the brain for the ages included in this study. A two-way analysis of variance was used to test …

The opinions of individuals may be influenced by groups of different gender configurations. This influence was studied by asking college students to respond to a series of statements in pretest and post-test settings. Post-test settings included the use of manipulatively constructed confederate groups to influence the subjects' responses. A pretest was administered in an anonymous nonthreatening environment. Within a week, the subjects were post-tested in a setting with four "confederates" who had previously been instructed to unanimously voice opposite answers to the subjects' initial responses to pretest questions. The objective of this experiment was to determine the number of opinions that were changed when confronted with opposing views. Change of opinions between pretest and post-test were considered to be operational definitions of "conformity."

Because international students are an increasingly significant aspect in American colleges and universities and on the North Texas State University campus in particular, this study was undertaken to explore the intercultural clash which Thai students at North Texas State University experience. Twenty-two Thai students were interviewed in depth using the oral history method. Ten faculty and administrators who work with international students were interviewed concerning their observations of Thai students. The information gleaned from these thirty-two interviews and from an examination of the basic socio-cultural differences between Thailand and the United States resulted in the isolation of the following basic difficulties. 1. Thais do not have command of written and oral English. 2. Americans do not have an appreciation of foreigners and lack tolerance in everyday exchanges with them. 3. Thais avoid becoming involved in American society. 4. Thais are not efficiently prepared for the American classroom. 5. American instructors do not appear prepared to handle the problems of Thai students. The study also developed a number of suggested solutions: 1. Raise the consciousness of Americans concerning Thai students; 2. Provide more effective ways of improving oral and listening skills in the English proficiency of Thai students beginning with American-directed …

The problem of this study was to investigate the strategies used by high school students of limited estimation ability for the estimation of the answers to computational problems. The Assessing Computational Estimation Test was administered to 460 students, and 40 of them were selected for interviews. Each student interviewed was asked to estimate the answers to fourteen computation and application problems.

The dual role of classroom teacher and athletic coach is commonly combined in public school systems, often resulting in job related conflicts. The purpose of this study was to examine the job attitudes of teacher-coaches as perceived by teacher-football coaches (n=283) and high school principals (n=43) and identify areas where role preference occurred. The teacher-coaches and principals responded to a job attitude instrument designed to measure attitudes concerning job related tension, participation in decision making, job involvement and job satisfaction during the roles of teaching and coaching.

The purpose of this study was three-fold: 1. To determine the amount and direction of changes in sources of funding for the Regional Education Service Centers from 1979 to 1984. 2. To determine the percent of change in programming expenditures of the Regional Education Service Centers from 1979 to 1984. 3. To rate the changes in quality of programming as perceived by the superintendents of the local school districts receiving services from 1979 to 1984. A review of the literature and a brief history of the Regional Education Service Centers of Texas were followed by tabular and narrative descriptions of the findings. Deflated data, to account for inflation, were derived by applying Bureau of Labor statistics formulas to dollar amounts supplied by the Regional Education Service Centers. Each of the five Education Service Centers included in the study experienced a decrease in total funds, due chiefly to a cut in federal and state support. Although local contributions increased in four out of five of the Regions during the five-year period, the net result to the Centers was a decrease in funding ranging from 23.2 percent to 51.8 percent. The impact on programming was severe. Of the nine major services on …

The purpose of this study was to investigate aspects of pitch perception of auditors when presented with musical tones whose frequencies were modulated. Research problems were: estimation of the effect of musical training upon pitch perception; estimation of the effect of stimuli of differing tonal qualities and frequency ranges upon perception; and estimation of the effect of solo and ensemble performances upon pitch perception. Subjects for the study were thirty musicians and thirty nonmusicians. Subjects were students at North Texas State University and Paris Junior College who had volunteered for the study. A test containing thirty-six items was developed which required subjects to match a tone created by a sawtooth wave generator to a simultaneously presented musical tone performed with vibrato. Each subject was tested individually, and allowed three attempts to match each test item. After the third playing of each item, a reading was taken of the frequency selected by the subject, Using the split half method, reliability for the test was found to be .86 for nonmusicians and .88 for musicians. ANOVA evaluation of responses of subjects indicated that there was a significant difference.in the location of pitch among musicians and nonmusicians, with musicians locating the pitch somewhat …

This study sought to determine the influence of pretherapy religious value information upon potential clients' (a) perceptions of a counselor, (b) willingness to see a counselor and (c) confidence of counselor helpfulness. Two hundred and ten undergraduate college students volunteered for the study. Subjects were randomly assigned to one of three treatment groups and given varying amounts and types of written information about a counselor. Group 1 received just the counselor's credentials. Group 2 received the same information plus statements about the counselor's beliefs about counseling and his therapeutic approach. Group 3 received the same information as group 2 plus a statement of the counselor's religious values. Subjects then viewed a short video tape of the counselor in a counseling session. Results of statistical treatment of dependent variables indicated that subjects' perceptions of the counselor, willingness to see the counselor, and confidence of counselor helpfulness were not influenced by the written information, including the statement of religious values that the subjects received before viewing the video tape of the counselor. Implications and recommendations for further research are discussed.

Corynebacterium poinsettiae mutant strains blocked in carotenoid biosynthesis were obtained by treatment with the mutagen N-methyl-N1-nitro-N-nitrosoguanidine. Additional carotenoid (Crt) mutant strains were obtained from a previous study conducted in our laboratory. Fifty-nine Crt mutants affected in carotenoid biosynthesis were examined by a normal phase high performance liquid chromatography (HPLC) system. Pigment extracts of Crt mutants and C. poinsettiae wild type strains were resolved by an isocratic system with hexane:acetone:dicholoromethane, 11.35:1.73:1.00 (by vol.) as the eluting solvent. In addition to the five major peaks, twelve minor peaks were observed in the wild type C. poinsettiae strain used in this study. Crt mutant and wild type strain peak heights were measured from the individual chromatograms and the peak height data set created was analyzed using the Statistical Analysis System program to perform a cluster analysis. The cluster analysis revealed five carotenoid mutant groups. Carotenoid pigments which accumulated or were absent in each of the cluster groups are reported. Cluster group 1 mutants (CrtA) are blocked in the dehydrogenase(s) which is(are) responsible for the dehydrogenations between phytoene and lycopene. Cluster group 2 mutants (CrtB) appear to be blocked at a second dehydrogenase specific for the dehydrogenation from C.p. 470 to C.p. 496. Cluster …

This study addresses how the temperament characteristics of seven year old learning disabled students are viewed in relation to those of the normally achieving students. Teacher perceptions, parent perceptions, and teacher versus parent perceptions are examined utilizing the six dimensions (activity, adaptability, approach/withdrawal, intensity, distractibility, and persistence) and the three factors (emotionality, sociability, and persistence) of the Temperament Assessment Battery.

The purpose of this study was to determine the role of high school assistant principals as perceived by principals, assistant principals, and teachers. The population in this study consisted of the principals, assistant principals, and teachers in Class 5A high schools in Texas during the 1985- 86 school year. One hundred and twenty of the Class 5A high schools were randomly selected to participate in the study. One principal, one assistant principal, and one teacher from each school were asked to respond to the survey. A questionnaire was designed to measure the perception of the three groups under study and contained seventy-seven job responsibilities which were divided into six major areas. The six areas were school management, staff personnel, community relations, student activities, curriculum and instruction, and pupil personnel. Eighteen items were eliminated through clarity, appropriateness, and reliability studies. Each respondent was asked to rate the degree of involvement of assistant principals for each job responsibility listed in two columns labeled current and ideal. Five hypotheses were developed for the study. Three hypotheses were tested by a multivariate one-way analysis of variance with repeated measures, and two were tested using a univariate one-way analysis of variance. The .05 level of …