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1,072 Matching Results
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Prevention of biofouling on heat transfer surfaces of ocean thermal energy converters. Progress report, May 1, 1975--November 30, 1975
The objectives of the program were to develop chemical processes utilizing a combination of certain fluorochemicals and tribulyltin based toxicants for treating the surfaces of metals which may be used to fabricate OTEC heat exchangers, and to demonstrate the effectiveness of these surface treatments as antibiofoulants. Aluminium alloy No. 3003-H14 and titanium were testd, neither of which proved satisfactory. (WDM)
Date:
December 1, 1975
Creator:
Ostrozynski, R.L. & Jones, P.E.
Object Type:
Report
System:
The UNT Digital Library
Correlation of mechanical and metallurgical parameters with the acoustic emission during tensile deformation of several metals and alloys
Acoustic emission was monitored during plastic deformation under dead-weight tensile loading of polycrystalline aluminum, brass, copper, and steel. The acoustic emission data, both threshold-type and frequency-analysis type, were correlated with yield strength, stored elastic energy, strain hardening parameters, loading histories, diffusion processes, slip band motion and mosaic cell size. Major results are presented under the headings discontinuous yielding (Portevin--Le Chatelier Effect), parabolic strain hardening, and frequency analysis. The principal experimental techniques are also summarized. (auth)
Date:
December 1, 1975
Creator:
Hartman, W. F.
Object Type:
Report
System:
The UNT Digital Library
Search for Shallow Magma Accumulations at Augustine Volcano. Progress Report
A large amount of geological and geophysical data, including thermal, geochemical, geodetic, magnetic, and seismic measurements and a shallow drill hole, was acquired during the 1975 field season. Data reduction and analysis are in progress.
Date:
December 1, 1975
Creator:
Kienle, J.
Object Type:
Report
System:
The UNT Digital Library
Studies of encapsulant materials for terrestrial solar-cell arrays. First quarterly progress report, October 9--December 9, 1975
Study 1 of this contract is entitled ''Evaluation of World Experience and Properties of Materials for Encapsulation of Terrestrial Solar-Cell Arrays.'' The approach of this study is to review and analyze world experience and to compile data on properties of encapsulants for photovoltaic cells and for related applications. The objective of the effort is to recommend candidate materials and processes for encapsulating terrestrial photovoltaic arrays at low cost for a service life greater than 20 years. The objectives of Study 2, ''Definition of Encapsulant Service Environments and Test Conditions,'' are to develop the climatic/environmental data required to define the frequency and duration of detrimental environmental conditions in a 20-year array lifetime and to develop a corresponding test schedule for encapsulant systems. (WDM)
Date:
December 22, 1975
Creator:
Carmichael, D.C. (comp.)
Object Type:
Report
System:
The UNT Digital Library
Compilation of TFTR materials data
In order to document the key thermophysical property data used in the conceptual design of Tokamak Fusion Test Reactor (TFTR) systems and components, a series of data packages has been prepared. It is expected that data for additional materials will be added and the information already provided will be updated to provide a project-wide data base.
Date:
December 1, 1975
Creator:
Havener, W.J.
Object Type:
Report
System:
The UNT Digital Library
Sequence of operations: TFTR assembly and disassembly
A conceptual sequence of operations necessary to complete initial assembly of the Tokamak Fusion Test Reactor (TFTR) are described along with subsequent disassembly operations and special techniques planned for use during radioactive disassembly. Special attention is given in this report to techniques, personnel exposure, and equipment needed to effect the opening and closing of a vacuum vessel port and the installation of the vacuum vessel seal weld cutting machine under radioactive conditions.
Date:
December 1, 1975
Creator:
Francy, W. J. & Lampe, R.
Object Type:
Report
System:
The UNT Digital Library
Hot low Btu producer gas desulfurization in fixed bed of iron oxide fly-ash. Quarterly report No. 1, 1 July--30 September 1975
None
Date:
December 3, 1975
Creator:
Gussow, S. & Mitchell, M. M., Jr.
Object Type:
Report
System:
The UNT Digital Library
Experimental studies of zirconium/aluminum getter pumps
Getters of the type to be utilized as tritium pumps in the foreline of the TFTR torus vacuum system, and presumably in those of the neutral beam injector arms, were evaluated using hydrogen and deuterium. The capacity and speed as rated by the manufacturer (SAES) are found to be conservative. In addition, the getters are shown to continue to pump hydrogen even in the presence of chemically active, impurity gases, provided the getter temperature is maintained at >300/sup 0/C. Since hydrogen pumping is reversible, the getters can be used over and over again after reactivation to release the previously pumped hydrogen. By operating a tungsten filament to crack methane, and using the getter to pump the hydrogen produced, relatively high speed and capacity for methane is demonstrated.
Date:
December 1, 1975
Creator:
Lange, W. J.
Object Type:
Report
System:
The UNT Digital Library
Behavioral outcomes of short-term nondirective play therapy with preschool deaf children
This study was conducted to investigate change (as measured by positive growth changes in total personality adjustment, social maturity, and behavior patterns) in pre-school deaf children with behavioral problems who experienced short-term, nondirective play therapy. Change in behavior of these children was also investigated ten weeks after therapy.
Date:
December 1975
Creator:
Oualline, Viola Jackson
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Organizational adaptation to social change: Methodist churches in urban transitional areas
This study is designed to examine churches in transitional areas of urban centers and how they adapt to social change. The research questions are: What modes of adaptation do churches select in response to social change? Why do churches when faced with social change select different modes of adaptation?
Date:
December 1975
Creator:
Vetter, Charles E.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A French music aesthetic of the eighteenth century: a translation and commentary on Michel Paul Gui de Chabanon's Musique considérée en elle-même et dans ses rapports avec la parole, les langues, la poésie, et le théâtre
This annotated translation of Chabanon's Musique considérée with accompanying analysis seeks to establish the aesthetic principles expressed in his book as a significant and independentdeparture from the musical doctrines which prevailed in eighteenth-century France.
Date:
December 1975
Creator:
Lyall, Harry Robert
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An analysis of faculty attitudes toward administrators in an urban junior college district
The problem of this study is to describe and analyze faculty attitudes toward administrators in an urban junior college district. The purposes of this study are to ascertain the attitudes of junior college faculty toward campus-level administrative positions and to determine what relationship existed between general and specific measures of faculty attitude.
Date:
December 1975
Creator:
Birkner, Samuel Davis
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Analysis of activities in production typewriting and development of a teaching model and standards
The problem of this study is an analysis of activities in production typewriting, development of a teaching model, and establishment of production standards. The study has four main purposes which are: (1) to identify the time spent in keystroking, decision making, typing from longhand copy, erasing an original, typing and correcting one carbon copy, and proofreading; (2) to test the correlation between anxiety level and decision-making time, and IQ and decision-making time; (3) to analyze the differences in difficulty level of six production tasks and develop a teaching model; and (4) to discover the mean gross words per minute rate and total number of errors on six production tasks and develop production standards.
Date:
December 1975
Creator:
Foust, Patsy
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Kinetics and mechanism of substitution reactions of tungsten carbonyl complexes containing bidentate sulfur ligands
Previous investigation of the kinetics and mechanism of the substitution reaction of bidentate substituted transition metal carbonyl complexes with Lewis bases (L') to yield the cis distributed bidentate substitution product, where M=Cr, Mo, or W and S-S = DTO (2,2,7,7-tetra-methyl-3, 6-dithiaoctane) or DTN (2,2,8,8-tetramethyl-3,7-dithianonane) have suggested that this reaction proceeds via a mechanism involving initial reversible dissociation of one end of the bidentate sulfur ligand followed by rapid attack of L' on the resulting five-coordinate intermediate.
Date:
December 1975
Creator:
Schultz, Linda D.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The impact of a substantial pay raise on teacher performance and job satisfaction in Region IX Service Center area of Texas
The problem with which this investigation is concerned is to determine the effect of a recent substantial salary increase upon job satisfaction and job performance of Texas teachers. A comparison was made between the results of an evaluation of performance and measure of job satisfaction found in the 1973 study by McPherson with the same population in 1975.
Date:
December 1975
Creator:
Neely, Jerry
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The synthesization of a curriculum development model and the development of a prototype training program--part II
The purposes of this study were to develop and validate a Prototype Training Program designed to prepare potential curriculum workers to implement the Synthesized Curriculum Development Model in Part I.
Date:
December 1975
Creator:
Blackwood, Nancy Anne
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The use of electronic calculators in a basic mathematics course for college students
The problem with which this investigation was concerned was that of the determining relationships between attitude and between achievement of students in those classes in college basic mathematics which utilized electronic calculators during class sessions and students in those classes which did not utilize electronic calculators.
Date:
December 1975
Creator:
Nichols, Warren E.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An investigation of distribution channel decision policies of United States manufacturers
This study is designed to examine distribution channel selection and evaluation policies of small, medium, and large United States manufacturers. Significance of various factors considered in the selection and evaluation procedures is ascertained.
Date:
December 1975
Creator:
Welch, Joe Lloyd
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Characterizations of properties of spaces of finitely additive set functions in terms of mappings and integrals
Settings and notions are as in previous abstracts of W. D. L. Appling. This paper contains an investigation of the relationship between a class of non-linear functions defined on PAB and certain subspaces of PAB in particular Appling's linear C-sets, Solomon leader's finitely additive Lp spaces, and one of the projective limit spaces studied by Davis, Murray, and Weber.
Date:
December 1975
Creator:
Bell, Wayne C.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The influence of Stoicism on the Jacobean drama
The purpose of this dissertation is to identify the Stoic influences in the Jacobean drama. Although the Stoic figure and references to Stoicism appear frequently in this drama, there has never been a comprehensive study of the Stoic element in the drama of this period. This study will fill this scholastic gap.
Date:
December 1975
Creator:
Wilson, Rodney Earl
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A study in self-scheduling of high school students as opposed to computer scheduling
The problem with which this investigation is concerned is that of determining success of selection of classes and satisfaction or dissatisfaction with self-scheduling as opposed to computer scheduling. A survey is made of 468 randomly selected high school students from four high schools in a large metropolitan school district.
Date:
December 1975
Creator:
Bingham, Walter W.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Mixed dimerizations of halogenated ketenes and chemistry of cycloadducts
The investigation presented is in two parts: a study of the mixed dimerizations of halogenated ketenes with non-halogenated ketenes and a study of the rearrangements of 8-chloro-8-methylbicyclo {4.2.0} oct-2-en-7-ones.
Date:
December 1975
Creator:
Ting, Patrick Lu-ping
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The synthesization of a curriculum development model and the development of a prototype training program--part I
The purpose of this study was to research and synthesize a new curriculum development model which has a theoretical base, proven practicality, and usefulness for local school districts.
Date:
December 1975
Creator:
Barker, Nancy Evans
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Teacher evaluation practices in selected Texas public high schools
The problem of this study was an investigation of teacher and administrator perceptions of teacher evaluation and the relationship of those perceptions to teacher evaluation policies and practices in public high schools in the State of Texas.
Date:
December 1975
Creator:
Reavis, Ralph G.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library