A numerical analysis of the nonlinear response of bonded joints is presented. Mechanical and thermal loadings are considered. Material stress-strain response is represented by Ramberg-Osgood approximations. Temperature-dependent properties including modulus percent retentions and coefficients of expansion are modeled with linearly segmented curves. Bonded joints with graphite-polyimide, boron-epoxy, titanium, or aluminum adherends are analyzed using a quasi 3-dimensional finite element analysis. In adhesively bonded joints, the adhesives considered are Metlbond 1113 and AF-126-2. Elastic results are presented for single and double lap joints, with and without adhesives. It is shown that mechanically induced stresses are greatly affected by longitudinal adherend stiffness. The effects of adherend transverse stiffness are shown to be significant in some cases. Residual curing stresses are shown to be significant in all joints except those with similar adherends and no adhesive. Nonlinear results are presented for adhesively bonded joints. It is shown that adhesive nonlinearities are only significant in the predicted adhesive shear stresses. Adherend nonlinearities and temperature-dependent properties are shown to have little effect upon the adhesive stress predictions under mechanical and thermal loadings. / Master of Science

An investigation of rotor blade pressure distributions at three-span positions during surge of a low-speed axial-flow compressor was conducted for a single throttle position. The operating path of the compressor system was experimentally determined and the blade pressure distributions were correlated to their point of occurrence during the surge cycle. A comparison of these pressure distributions with the blade pressure distributions obtained during steady-state operation of the compressor at the same throttle position is presented. The steady-state compressor characteristic was determined to show the range of operation of which the compressor was capable. A mathematical model was applied to the experimentally-determined compressor characteristic and the system geometry varied to determine its effect on the stability. The effect of the time response of the compressor, to changes in mass flow rate, on the stability of the system was also investigated. / Master of Science

The purpose of this exploratory study was to investigate the factors associated with the selection of riding attire worn by horse show exhibitors. The second purpose was to compare this data to similar data obtained from professional judges. Two instruments were developed to provide data to meet objectives and hypotheses. Data was collected from 127 horse show exhibitors from the mailing list of the Appalachian Horse Show Association, and also from 24 judges of the American Horse Show Association. Statistical analysis included condescriptive information, one way analysis of variance, frequency distribution, Chi-square, t-tests, and z-tests to investigate relationships between variables for significance. The most important appearance factor in selection of riding apparel on the part of both exhibitors and professionals was that apparel be appropriate for the class entered. Exhibitors felt that apparel plays more than average importance in a judge's evaluation. Professionals placed average importance on apparel in their evaluation. Professionals were most frequently consulted by exhibitors about colors and styles to select. Professionals indicated they most frequently gave advice on rules governing dress, then on styles and colors to select. The most difficult problem for exhibitors in locating desired apparel items was the distance to an appropriate store. There was a significant difference between horse's breed and the desire for the color of the habit to be compatible with the exhibitors' horse. There was no significant difference for the following variables: amount of competition by breed, appearance factors with source of income or education, amount of competition with source of income or education. Professionals' and exhibitors' opinions governing riding apparel did show some significant relationships.: / Master of Science

The purpose of this study was to ascertain if day care significantly alters the child's propensity toward the formation and maintenance of attachment bonds towards its mother. It was maintained that the variable of day care in the life of an infant would cause disruption to his attachment to his mother sufficient to elicit attachment behaviors different than those of his counterpart home reared infant when they were placed in a strage environment. This assertion was based on the ethological-evolutionists theory which maintains that the rearing environment cannot alter significantly from that environment of evolutionary adaptiveness if a secure mother-child attachment is to be formed. The observation checklist, designed by Morgan and Ricciuti was employed to measure the reactions of eight day care and eight home reared infants, ten to eighteen months, to an adult male and an adult female stranger. The checklist was composed of two behavioral scales - facial expression and motor activity - to rate the infant's reactions to the strangers. A movie camera was used to record the testing to insure the reliability of the observations. No significant difference occurred between the day care infants' responses and the home reared infants' responses. Daily separation for these day care infants, therefore, was not a sufficient enough disruption in the attachment process to cause the exhibiting of different attachment behaviors than their counterpart home reared infants. / Master of Science

Channeled streams tended to have higher drift densities and lower benthic standing crop densities than unchanneled streams. Drift densities increased markedly below a small flood control impoundment as the result of the influx of large numbers of organisms of limnetic origin. The density of these organisms in the drift decreased rapidly as the distance downstream from the reservoir increased. / Master of Science

The objective of this thesis was to utilize the Amateur-Professional typology, as defined by James Q. Wilson, to examine party activism among delegates to the 1976 Republican National Convention. Specifically, correlations between socio-economic variables, political socialization experiences, and the incentives which motivated the delegates were to be studied. The first hypothesis was tested by crosstabulating the Amateur- Professional Index with the traditional socio-economic characteristics. Essentially, the data confirmed past research which indicated that socio-economic variables are not significantly related to activist style. The second hypothesis examined the relationships between activist style and family political activity, agents of initial political socialization, years of activity in the party, past convention experience, and perception of their role as a delegate. The results produced tended to indicate that those delegates with politically active families, more years active in the party, greater participation in past conventions and a more "person" rather than "issue" orientation, were likely to be more professionally oriented than the delegates who possessed an opposite political background. This finding was essentially in keeping with past research and therefore confirmed the hypothesis. The last hypothesis examined the delegates' preferences for incentives for maintaining their party activity. Although most delegates expressed a greater preference for purposive rather than material incentives, it was found that more amateurs preferred purposive incentives, while more professionals preferred the material incentives. This finding was consistent with previous research and the hypothesis was confirmed. / Master of Arts

1- As cities emerge in indeterminate directions, the mobility of structures prolongs their usability. 2- A portable church having an approximate life of 40-50 years will be capable of being re-erected several times and have expansion potential where greater activity requires. 3- Alternative uses include their semi-permanent construction in underdeveloped countries, or areas of natural disasters, to bring solidarity among people. 4- "Simplicity, standardization, openness, spaciousness and lightness...vitality." / Master of Architecture

Resolution of the main issues in largemouth bass management will require the ability to predict the effects of exploitation on population structure, optimally select size limits, relate bass population structure to prey population structure, and predict the effects of fluctuations in recruitment on production and yield. A general model of population structure was developed for use in studying these problems. The model was derived by examining the relationship between life history and population structure. Life history processes are described as mixed continuous and jump stochastic processes. The model was derived in two forms, an integro-differential equation and a stochastic integral equation, which include all of the classical continuous-time population models as special cases. Two general results concerning the model were proven. First, the stochastic integral equation was shown to predict the same expected population structure as a deterministic model using average birth and death rates whenever the processes are uncorrelated. However, it is very unlikely that birth rate, death rate, and density will be independent, so the stochastic and deterministic models will generally diverge. Second, it was shown that with density-independence the expected population structure in the stochastic model is asymptotically stable. Special cases of the model were used to illustrate the possible effects of exploitation on average catchability and population structure. Methods for calculation of optimal length limits and production and yield were illustrated for simple cases. Use of the full power of the model, however, must await more detailed description of factors influencing mortality and growth, especially the effect of the density and size structure of available prey. / Master of Science

The purpose of this thesis is to examine the policies behind Soviet intervention in the Spanish Civil War. The U.S.S.R. had two principal foreign policy goals in the late 193O's, goals which were applied to Spain from the outset of the Civil War. These were to stop the spread of Fascism and to develop close relations with Britain and France. Both goals had as their foundation a concern for the security of the Soviet Union. Faced with the disappointment of France's policy of Non-Intervention, and at the same time by a worsening Republican military situation, the U.S.S.R. sought to pursue both goals with regard to Spain by conducting a holding action in the Iberian peninsula and simultaneously attempting to establish an effective Non-Intervention Committee. An effective Committee would, hopefully, promote good ties with the democracies and at the same time prevent the victory of Fascism in Spain. Until the Spring of 1937, Soviet policy in regard to Spain was conducted skillfully. In the first part of 1937, however, Stalin ordered a purge of the Catalan Left, which undermined his previous policy in Spain. Stalin's concern for his own personal power thus jeopardized a policy which had as its foundation the defense of the Soviet Union. / Master of Arts

A prototype system with wash water recirculation was studied as a possible method of water conservation in the food processing industry. A conventional leafy-greens washer at the Exmore Foods Company, Incorporated, Exmore, Virginia, was compared with a prototype system. Spinach and turnip greens were processed with the two systems. The quality of the product and that of the wash water from both systems was compared by measuring grit content, bacteria contamination, and insect contamination of the product; TSS, VSS, COD, and grit concentrations in the wash water. The results indicated the better performance of prototype system which required only 23 percent of the water used by the conventional washers. The mathematical model developed to describe the grit content in the wash water of the prototype during washing succeeded in producing predicted values generally close to measured values. / Master of Science