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Computer simulation of coal preparation plants. Part 2. User's manual. Final report
This report describes a comprehensive computer program that allows the user to simulate the performance of realistic coal preparation plants. The program is very flexible in the sense that it can accommodate any particular plant configuration that may be of interest. This allows the user to compare the performance of different plant configurations and to determine the impact of various modes of operation with the same configuration. In addition, the program can be used to assess the degree of cleaning obtained with different coal feeds for a given plant configuration and a given mode of operation. Use of the simulator requires that the user specify the appearance of the plant configuration, the plant operating conditions, and a description of the coal feed. The simulator will then determine the flowrates within the plant, and a description of each flowrate (i.e., the weight distribution, percent ash, pyritic sulfur and total sulfur, moisture, and Btu content). The simulation program has been written in modular form using the Fortran language. It can be implemented on a great many different types of computers, ranging from large scientific mainframes to IBM-type personal computers with a fixed disk. Some customization may be required, however, to ensure compatibility …
Date:
December 1, 1985
Creator:
Gottfried, B. S. & Tierney, J. W.
Object Type:
Report
System:
The UNT Digital Library
Target plane imaging system for the Nova laser
The Nova laser, in operation since December 1984, is capable of irradiating targets with light at 1.05 ..mu..m, 0.53 ..mu..m, and 0.35 ..mu..m. Correct alignment of these harmonic beams uses a system called a target plane imager (TPI). It is a large microscope (four meters long, weighing one thousand kilograms) that relays images from the target chamber center to a video optics module located on the outside of the chamber. Several modes of operation are possible including: near-field viewing and far-field viewing at three magnifications and three wavelengths. In addition, the entire instrument can be scanned in X,Y,Z to examine various planes near chamber center. Performance of this system and its computer controls will be described.
Date:
December 12, 1985
Creator:
Swift, C. D.; Bliss, E. S.; Jones, W. A.; Reeves, R. J.; Seppala, L. G.; Shelton, R. T. et al.
Object Type:
Article
System:
The UNT Digital Library
Contaminant pathway analysis and health risk assessment of the Metallurgical Laboratory Basin
The specific objectives of this report are to present a technically detailed site description for the Metallurgical Laboratory basin, to document the manner in which it was modeled by the PATHRAE computer code, and to present the results of the pathway analyses, in terms of both contaminant transport and health risks. This will provide part of a detailed assessment of environmental risks and impacts from the Metallurgical Laboratory both in its present condition and after possible remedial actions to aid in selection of the appropriate remedial action options. In a broader sense, these objectives support the general SRP (Savannah River Plant) operations policy of protecting the environment and the health and safety of the public and operating personnel.
Date:
December 1, 1985
Creator:
Klein, R. B.; Merrell, G. B.; Nielson, K. K. & Rogers, V. C.
Object Type:
Report
System:
The UNT Digital Library
SOLERAS - Solar Controlled Environment Agriculture Project. Final report, Volume 1. Project summary
A summary of the Solar Controlled Environment Agriculture Project is presented. The design of the greenhouses include transparent double pane glass roof with channels for fluid between the panes, inner pane tinted and double pane extruded acrylic aluminized mylar shade and diffuser. Solar energy technologies provide power for water desalination, for pumping irrigation water, and for cooling and heating the controlled environment space so that crops can grow in arid lands. The project is a joint effort between the United States and Saudi Arabia. (BCS)
Date:
December 30, 1985
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Report of exploratory trenching for the Decontamination and Waste Treatment Facility at Lawrence Livermore National Laboratory, Livermore, California
Three exploratory trenches, totaling about 1,300 ft in length were excavated and logged across the site of a proposed Decontamination and Waste Treatment Facility (DWTF), to assess whether or not active Greenville fault zone, located about 4100 ft to the northeast, pass through or within 200 ft of the site. The layout of the trenches (12-16 ft deep) was designed to provide continuous coverage across the DWTF site and an area within 200 ft northeast and southwest of the site. Deposits exposed in the trench walls are primarily of clay, and are typical of weakly cemented silty sand to sandy silt with the alluvial deposits in the area. Several stream channels were encountered that appear to have an approximated east-west orintation. The channel deposits consist of well-sorted, medium to coarse-grained sand and gravel. A well-developed surface soil is laterally continuous across all three trenches. The soil reportedly formed during late Pleistocene time (about 35,000 to 40,000 yr before present) based on soil stratigraphic analyses. A moderately to well-developed buried soil is laterally continuous in all three trenches, except locally where it has been removed by channelling. This buried soil apparently formed about 100,000 yr before present. At least one older, …
Date:
December 1, 1985
Creator:
Dresen, M.D. & Weiss, R.B.
Object Type:
Article
System:
The UNT Digital Library
Structural Dynamics and Fluid Flow in Shell-and-Tube Heat Exchangers : Summary and Overview of a DOE/ECUT-Sponsored Research Program
Report on solving problems with shell-and-tube heat exchangers resulting from recent trends toward higher flowrates, larger size, and optimized designs.
Date:
December 1985
Creator:
Wambsganss, M. W.; Halle, Henry & Mulcahy, T. M.
Object Type:
Report
System:
The UNT Digital Library
Tube Vibration in Industrial Size Test Heat Exchanger (22 Additional Configurations)
Typical industrial shell-and-tube heat exchanger configurations are investigated systematically for the occurrence of potentially damaging tube vibration as a function of flow-rate. In continuation of an ongoing experimental program, results from shell-side water flow tests of twenty-two additional test exchanger configurations are reported. The test cases include single- and double-segmentally baffled tube bundles having various combinations of triangular and square tube layout patterns, baffle arrangements, and baffle edge orientations. All layouts had a tube pitch-to-diameter ratio of 1.25. The testing focused on identification of the lowest critical flow-rates to initiate fluid-elastic instability and/or large amplitude tube motion and the location within the bundle of the tubes which first experience these responses. The threshold flow-rates are determined from a combination of methods based on sensory observations, vibration amplitude data, and frequency response information. Instability criteria are preliminarily evaluated. Also reported are the measured overall shell-side pressure drop and the incremental pressure drops across sections of the exchanger for all configurations.
Date:
December 1985
Creator:
Halle, Henry; Chenoweth, James M. & Wambsganss, M. W.
Object Type:
Report
System:
The UNT Digital Library
Environmental impacts of proposed Monitored Retrievable Storage
This report describes environmental impacts from a proposed monitored retrievable storage facility for spent fuels to be located in Tennessee. Areas investigated include: water supply, ground water, air quality, solid waste management, and health hazards. (CBS)
Date:
December 17, 1985
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Abundance and Distribution of Walleye, Northern Squawfish, and Smallmouth Bass in John Day Reservoir, 1984-1985 Progress Report.
Sampling was conducted in John Day Reservoir to collect walleye, northern squawfish and smallmouth bass. Changes in distributions during sampling were characterized from changes in catch per unit effort (CPUE) in sampling areas. Observed movements of marked and radiotagged fish were examined and used to define discrete populations. Abundances were estimated using a modified Schnabel multiple mark and recapture estimator. Abundance estimates were corrected for angler harvest, size specific vulnerability to gear, recruitment due to growth and tag loss during sampling. Age composition of catch was determined to characterize relative contributions of various year classes to the populations. Ages at which fish were fully recruited to gear were defined by catch curves. Survival of fully recruited year classes was calculated from differences in CPUE's between 1984 and 1985. Mean length at age was estimated and used to determine age specific incremental growth. Eighty-eight percent of walleye were caught in McNary tailrace or Irrigon-Paterson, whereas 95% of smallmouth bass were caught from Irrigon-Paterson to the John Day forebay. Abundances of walleye and northern squawfish with fork lengths greater than 250 mm and smallmouth bass with fork lengths greater than 200 mm were estimated to be 16,219, 95,407, and 11,259. Anglers harvested …
Date:
December 1, 1985
Creator:
Beamesderfer, Raymond C.
Object Type:
Report
System:
The UNT Digital Library
Columbia River White Sturgeon (Acipenser Transmontanus) Early Life History and Genertics Study, August 1, 1984 to December 31, 1985 Final Report.
Research on Columbia River white sturgeon has been directed at their early life history as it may apply to production and enhancement strategies for management of the species. The river environment in which sturgeon historically migrated, spawned, and reared has changed through development. Habitat changes are expected to precipitate genetic changes in the fish, as well as reduce the fitness in populations. Genetic analysis of samples taken from various locations over the length of the Columbia River have indicated that observed gene frequencies in all areas sampled were not in Hardy-Weinburg equilibrium, which could suggest that the general population is experiencing perturbation in the system. Analysis thus far has exposed few differences between samples from the lower, middle, and upper portions of the system. Allelic differences were identified in fish from the Roosevelt Lake, which may be evidence of unique characteristics among fish from that general area.
Date:
December 1, 1985
Creator:
Brannon, Ernest L.
Object Type:
Report
System:
The UNT Digital Library
Fixed-bed gasification research using US coals. Volume 18. Program data summary and correlations. [C/sub 2/ and C/sub 3/ hydrocarbons]
A single-staged, fixed-bed, Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial participants and government agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas Group (MIFGa). This report is the eighteenth volume in a series of reports describing the atmospheric pressure, fixed-bed gasification of US coals. This specific report summarizes the results of eighteen different gasification tests in which fourteen different fuels were gasified from August 1982 to August 1985. The summaries and analyses reported here include correlations of product yields and compositions with coal analyses and gasifier operating conditions. Also included here are discussions of limitations to throughput, transient response of the gasifier, the grate performance model, and a discussion of electrostatic precipitation in coal gas medium. 25 refs., 41 figs., 6 tabs.
Date:
December 1, 1985
Creator:
Thimsen, D.; Maurer, R. E.; Lannto, O.; Pui, D. & Yeh, R.
Object Type:
Report
System:
The UNT Digital Library
Transportation impacts on the Tennessee highway system proposed monitored retrievable storage
The issue of the transport of spent fuels to the proposed monitored retrievable storage facility in Tennessee is discussed. Relevant issues include the ability of the roads and bridges on the transport routes to handle the weight of the trucks. (CBS)
Date:
December 12, 1985
Creator:
Cobble, C.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of the need, feasibility, and siting of the MRS in Tennessee
This summary report outlines the results of an independent assessment of the need, feasibility, and siting of the proposed Monitored Retrievable Storage (MRS) facility. The detailed reports of this assessment are included as appendices to the summary report. The Department of Energy (DOE) has concluded that the MRS is not absolutely necessary, but preferred, in order to manage and move spent fuel from reactors to a repository. The team has attemped to assess need'' by comparing to advantages and disadvantages of various systems, with and without the MRS. Feasibility has been assessed by comparing the technical and economic advantages and disadvantages. The team was not asked to recommend a preferred system. That choice will depend on the importance that are used to compare alternatives. The five key criteria selected by the team for comparing alternate systems were: economic cost, radiological risk, non-radiological transportation impacts, the likelihood of successful implementation and operation of the system, and the likelihood of meeting the schedule in the Nuclear Waste Policy Act. The team compared twelve different systems and modeled the transportation impacts and risks with three repository sites and two MRS sites.
Date:
December 16, 1985
Creator:
Colglazier, E.W. Jr. (Tennessee Univ., Knoxville, TN (United States))
Object Type:
Report
System:
The UNT Digital Library
Stress as a Factor in Primary Schoolchildren's Reading Difficulties: Some Implications for Remedial Reading
Stress is being linked increasingly to physiological, psychological, sociological, and educational problems. However, scant attention has been given to stress in recent reading research. This study investigated referral and evaluation statements and diagnostic data from parents, teachers, reading specialists, and counselors regarding signs of stress and potential stressors as factors in the reading difficulties of seventy-seven primary schoolchildren referred for evaluation at the pupil Appraisal Center (PAC) at North Texas State University between 1977 and 1984. Qualitative methods, specifically situational analysis, were employed to obtain a holistic view of each subject's reading difficulties. The researcher collected data from documented files at PAC. Data analysis via a categorical coding system produced thirty-nine stress related categories, organized under broad headings of family and school environment, readiness for reading/ learning, general stress reactions, and responses to stress when reading/learning becomes a problem.
Date:
December 1985
Creator:
Swain, Claudia Jones
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Impact of Strategic Management on Organizational Effectiveness in Jesuit Colleges and Universities
The organizational effectiveness and strategic management areas of organizational theory are the general focus of this study. Organizational effectiveness is defined as the extent to which an organization by the use of certain resources fulfills its objectives without depleting its resources and without placing undue strain upon its members and/or society. Strategic management is defined as an array of processes which leads to the development of an effective approach to achieve the organization's objectives. Little agreement appears to exist on how to evaluate organizational effectiveness and to what extent strategic management impacts organizational effectiveness. This is the problem this study addressed. This study presents an extensive review of the literature, formulates some syntheses and utilizes a questionnaire to gather pertinent data. The sample of respondents consisted of a group of key administrators from all the Jesuit colleges and universities in the United States. The questionnaire had a ninety percent response rate. This study was primarily a correlation study which emphasized the perceptions of the respondents regarding the elements and/or processes of strategic management and the concepts of organizational effectiveness. The Chi-Square and Spearman rank order tests were utilized for statistical measures. The analysis of data revealed any significant relationships between …
Date:
December 1985
Creator:
Favilla, Edward S.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Effect of Hypnotically-Induced Mood Elevation as an Adjunct to Cognitive Treatment of Depression
Cognitive therapy for the treatment of depression has generated substantial research indicating its effectiveness and it is currently considered among the most viable conceptualizations of depression. However, it has remained controversial because its methods do not directly address emotional symptoms in depressed persons. Treatment of depressed emotions is a primary focus of hypnotic mood elevating techniques. These techniques enable depressed persons to experience positive emotions during hypnosis sessions and to re-experience them daily concurrent with performance of certain specified behaviors. This study evaluated the efficacy of a multicomponent treatment which combines the techniques of cognitive therapy and hypnotic mood elevation in the treatment of depressed persons. The three treatment conditions constructed for this investigation were cognitive therapy plus hypnotic mood elevation, cognitive therapy plus pseudo-biofeedback, and no treatment waiting list.
Date:
December 1985
Creator:
Lucas, Scott Gordon
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Effects of Participation in a Buddy System on the Self-Concept, Academic Achievement, Attrition Rate, and Congruence Level of Community College Developmental Studies Students
This dissertation sought to determine the effects of a buddy system on a student's self-concept, academic achievement, attrition rate, and congruence levels. The buddy system treatment randomly paired two students for the purposes of sharing ideas, working on assignments, getting to know each other, and supporting one another. The study included three randomly selected sections of pre-college level, developmental writing classes from the Brookhaven College of the Dallas County Community College District. Three other classes served as the control group, and one instructor taught all six sections of the course. Three instruments were used as measures of change: the Tennessee Self-Concept Scale (TSCS), designed by William H. Fitts, measured self-concept levels; the Personality and Educational Environment Scale (PEES), created by Roger Boshier, measured congruence levels; and a written paragraph measured achievement levels in English. Attrition percentages were based on the number of students enrolled during the second week of class who were not present during the sixteenth week of class. To test for significance, an analysis of covariance procedure was used on the TSCS, PEES, and written paragraph results, and a test for the difference between proportions for independent groups was used on the attrition percentages. The class sections were …
Date:
December 1985
Creator:
Cinclair, Carol
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Symptoms of Childhood Depression as Factors in Children's Reading Difficulties
The purpose of this study was to investigate symptoms of childhood depression as factors in elementary school age children's reading difficulties. Subjects for study included children who evidenced symptoms of depression from among those referred to the Pupil Appraisal Center (PAC) at North Texas State University for reading difficulties between October, 1983, and April, 1985. The Weinberg Affective Scale (WAS), a screening device for childhood depression, was used to identify the subjects for this study. Using document analysis as the research approach, the researcher examined, recorded, and categorized referral and evaluation statements made by parents, teachers, counselors, and reading specialists the subjects1 PAC files that described symptoms of childhood depression. Also analyzed were diagnostic test data from the evaluation reports of PAC counselors and reading specialists.
Date:
December 1985
Creator:
Werner, Patrice Holden
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Association Between the Establishment of Audit Committees Composed of Outside Directors and a Change in the Objectivity of the Management Results-Reporting Function: an Empirical Investigation Into Income Smoothing Patterns
The purpose of this research was to empirically examine the effect of the establishment of outside audit committees on the objectivity of the management results-reporting practices of those companies that established such committees in response to the New York Stock Exchange mandate effective June 30, 1978. Management income smoothing behavior is taken as a measurable surrogate for the objectivity of the management results-reporting practices. This research involved the testing of one research problem. The research question asks, "Will the establishment of outside audit committees by companies that had no such committees prior to the New York Stock Exchange mandate effective June 30, 1978, be associated with a decrease in the degree of smoothing in the net income series for the period after that date relative to the degree of smoothing prior to that date?" The answer to this question required the selection of an experimental and a control group. Each group was composed of fifty New York Stock Exchange listed firms. Linear and semi-log regression models were used to measure each firm's degree of income smoothing (defined as reducing the variability of a net income series about its trend line). The change in mean square errors of the experimental and …
Date:
December 1985
Creator:
Roubi, Raafat Ramadan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Investigation of Factors Deterring Participation in Continuing Professional Education
This study was conceived as an attempt to determine .and analyze factors deterring participation in continuing professional education among social workers in environments where continuing education for relicensure is mandatory and voluntary. The specific research design implemented to complete this study was the ex-post facto descriptive design. The sample included 106 social workers randomly selected in the state of Texas where continuing education is mandatory and 94 social workers in the state of Louisiana where continuing education is voluntary. The instrument used was the Deterrent to Participation Scale developed by Scanlan (1983) and a demographic inventory. Scanlan (1983) earlier identified six factors deterring participation in continuing professional education: Disengagement, Lack of Quality, Family Constraints, Cost, Lack of Benefit, and Work Constraints. The study concluded that social workers in both states considered work constraint as a major factor deterring participation in continuing professional education. Also the factors of cost and lack of quality were also considered as crucial barriers in their efforts to participate in continuing professional education. The Wilks' multivariate test of significance of the means and univariate F tests at alpha level p < .05 revealed differences in the combined mean scores of social workers in both states when …
Date:
December 1985
Creator:
Akintade, Aribigbola
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Effect on Learning of Geographic Instruction Designed for Students' Verbal and Spatial Abilities
The purpose of this study was to compare student scores on geographic skills in the experimental group with student scores on geographic skills in the control group after adjustment was made in teaching methods and learning materials for verbal and spatial ability for students in the experimental group. Hypotheses tested at the .05 level were as follows. 1. Females would score higher than males on a criterion measure of verbal ability. 2. Males would score higher than females on a criterion measure of spatial ability. 3. Experimental/verbal students would score higher on a geography skills posttest. 4. Experimental/spatial students would score higher on a geography skills posttest. 5. The experimental group would score higher than the control group on a geography skills posttest. The sample was 150 high school United States History students in a medium-sized North Texas school district. Analysis of covariance was used to analyze results of the study of six classes after fifteen days of instruction in physical geography concepts. Experimental classes received geographic instruction directed to verbal and spatial abilities; control group classes received traditional geographic instruction which utilized textbook, lecture, and whole-group instruction. Three high schools participated in the study. Conclusions were that males and …
Date:
December 1985
Creator:
Flatt, Crystal Adonna Lee
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Family Environment, Affect, Ambivalence and Decisions About Unplanned Adolescent Pregnancy
This study investigated the relationships among family environment, demographic measures, the decisions made by unintentionally pregnant adolescents regarding post-delivery plans (stay single, get married, adoption), and the certainty with which these decisions were made. The Information Sheet, Family Environment Scale (Moos & Moos, 1981), and Multiple Affect Adjective Check List (Zuckerman & Lubin, 1965a) were administered to 17 5 pregnant adolescents, ages 14 through 22, who intended to carry their pregnancies to term. Pearson product-moment correlations and multiple regression analyses were utilized to assess the relationships between family environment and certainty of decision and between family environment and negative affect. Greater uncertainty was associated with nonwhite racial status and living with both natural parents or mother only. Higher levels of negative affect were related to lower levels of perceived family cohesion, independence, expressiveness, and intellectualcultural orientation. The demographic variables of age, trimester of pregnancy, and family constellation were also found to be useful in predicting levels of negative affect. Subjects who were older, further along in their pregnancies, and living with both natural parents or mother only tended to report greater negative affect. Findings of greater uncertainty and negative affect associated with living with the natural mother are consistent with …
Date:
December 1985
Creator:
Warren, Keith Clements
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Investigation of the Relationship Between Personality and the Use of Learning During the Life Transitions of Adults
In a three stage investigation the relationship between personality type and the use of learning as a coping device during the life transitions of adults was studied. Based on the assumption that a paper and pencil device could be constructed to achieve the same or nearly the same results that have been achieved through interviews with adult learners, the first two stages of this investigation involved the construction and validation of an instrument, the Adult Development Learning Inventory (ADLI), to measure the use of learning during life transitions of adults. The inventory has five subsections: a demographic profile, Life Events, Coping Strategies, Learning Activities, and Adulthood Tasks. Content validity of the ADLI was established through both the theory based in adult learning and developmental psychology and the panel of experts. Construct validation tools included principal component factor analysis and the Kruskal-Wallis ANOVA with age as the variable of discrimination. The instrument was capable of differentiating among age groups' perception of the tasks in the adult life cycle. For internal consistency, reliability estimates ranged from .83 to .94 for the subsections of the ADLI. Stage III of the investigation explored the relationship between the ADLI and personality as measured by the …
Date:
December 1985
Creator:
Watson, Jackie R. (Jackie Rieves)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Study of the Changes Over Time in State Anxiety in a Computer-Assisted Instructional Program
The purposes of this study were to analyze (1) the changes over time in the state anxiety level of children in a computer-assisted program of reading instruction and in classroom reading instruction, (2) the changes in state anxiety patterns as related to gender, achievement level, and ethnicity, and (3) the difference in anxiety levels of the students while in computer-assisted reading instruction and classroom reading instruction.
Date:
December 1985
Creator:
Spence, M. Janet (Martha Janet)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library