A mail questionnaire was used to obtain information regarding the socio-economic characteristics of private landowners pertinent to their views on access control and fee hunting and fishing. A total of 495 questionnaires, 33.0% of the 1,500 mailed to landowners in urban, mixed urban-rural, and rural counties, were returned and found usable. The investigation found that 39.0% of the respondents posted their land, totaling 42,327 acres or 43.2% of the total acreage sampled. Serious restriction of access to private land for hunting and fishing was found, especially in the urban and mixed urban-rural counties. Sixteen socio-economic characteristics were tested as being possible factors related to the accessibility of private land. Chi-square analysis found six factors to be significant when the data were sorted into access control groups (posting vs. nonposting) and attitude groups (agree vs. disagree). The landowners who post their property or display negative attitudes about free public access if permission is first asked: are well educated, often college level; are "new" owners (10 years or less, or nonresidents); own large properties, often greater than 150 acres; have an income yielding use of their land, often farming or leasing; are white-collar workers; and have high incomes, often greater than $15,000. Concerning fee hunting and fishing, the traditional view of open and free hunting and fishing prevails among the majority of private landowners; 9 of 495 are currently receiving income from sportsmen. / Master of Science

The purpose of this investigative study was to determine whether scores on the Otis-Lennon Mental Ability Test (OLMAT) and General Aptitude Test Battery (G) (GATB (G)) were related to success on the practical nurse licensing examination (SBTP) using race and age as demographic variables. A second purpose was to determine if OLMAT and GATB (G) scores varied in their ability to predict success on SBTP. Related problems of the study were to determine whether significant differences between group mean scores of Caucasians and non-Caucasians existed when the same instrument was used. Scores of mature and young subjects in the sample population were analyzed for significant differences on the same instrument also. The coefficient correlations between OLMAT and SBTP and between GATB (G) and SBTP were examined to determine if they differed for Caucasians and non-Caucasians as well as young and mature sub-groups. Two primary hypotheses pertained to a positive relationship between (1) OLMAT and SBTP scores and (2) GATB (G) and SBTP scores. The third primary hypothesis indicated that OLMAT was a higher predictor than GATB (G) on SBTP for all sub-groups. Secondary hypotheses pertained to positive relationships between scores of the six sub-groups on OLMAT and SBTP scores as well as GATB (G) and SBTP scores. The sample consisted of 305 adult students enrolled in practical nursing in Norfolk City Schools during a three-year period. The subject population was first divided into Caucasians and non-Caucasians. These two groups were separated into young and mature subjects. Socioeconomic factors were not considered in this study. Statistical procedures used to test the hypotheses were univariate difference analysis, multivariate difference analysis, and correlational analysis. All hypotheses were tested at the .05 level. Major conclusions were as follows: 1. Both OLMAT and GATB (G) were significant predictors of success on SBTP for the total group . 2. Although OLMAT and GATB (G) were significant predictors of success on SBTP for this total subject population, they were not consistent for all sub-groups. One such exception appeared with the mature, non-Caucasian group which had a small number. 3. OLMAT was a significant predictor of success on SBTP for all groups in this subject population except for the mature non-Caucasians. 4. GATB (G) was a significant predictor of success on SBTP for all Caucasian groups in the sample. 5. GATB (G) was not a significant predictor of success on SBTP for non-Caucasian groups in this study. 6. There was no significant difference in coefficient correlations between sub-groups separated by race and age. 7. Mature practical nursing students performed better than young subjects on OLMAT, GATB (G), and SBTP . 8. Caucasians performed better than non-Caucasians on OLMAT, GATB (G), and SBTP as evidenced by an analysis of their combined scores on these three instruments. / Ph. D.

The present study investigated the parental attitudes expressed by adults who were reared in an institutional setting and adults who were reared in a nuclear family setting. The Parental Attitude Research Instrument, developed by Schaefer and Bell (1958), was used to elicit parental attitudes of the adults regarding child-rearing practices. The sample of the study consisted of fifty-four Caucasian adults, thirty-four males and twenty females. Of the total sample, twenty-seven adults, seventeen males and ten females, were reared in an institutional setting and twenty-seven adults, seventeen males and ten females were reared in a nuclear family setting. Subjects from the nuclear family setting were matched according to sex, age and level of educational attainment to subjects from the institutional setting. The most important finding of the study was that the parental attitudes expressed by adults reared in the instructional setting did not differ significantly from the parental attitudes expressed by the adults reared in the nuclear family setting. Females were more likely than males to view their children as equals and to express preference for an atmosphere where children would feel free to express their opinions concerning policies that governed their behavior. Males were more likely than females to exhibit attitudes favorable to inhibition of the sexual curiosity expressed by their children and to the acceleration of their children's development. There was little difference in the mean scores between males and females on the eleven remaining subscales. / Master of Science

When it is necessary to apply several different treatments in succession to a given subject, the residual effect of one treatment on another must be taken into consideration. A number of various designs have been developed for this purpose. A number of them are presented in this paper and can be summarized as follows: Type I: Balanced for first-order residual effects. For n, the number of treatments, even, any number of Latin squares can be used; for n odd, an even number of squares is necessary. Type II: Formed by repeating the final period of Type I designs. Direct and residual effects are orthogonal. Type III: Formed from p<n corresponding rows of n-1 orthogonal nxn Latin squares. Type IV: Complete orthogonality except for subjects and residuals. Very efficient but large numbers of observations are necessary. Type V: Designs balanced for first and second order effects. Also formed from orthogonal Latin squares. Type VI: Designs orthogonal for direct, first and second order residuals. Designs presented for n=2, 3 and 5. Type VII: Orthogonal for linear, quadratic, ...components of direct and linear component of residual effects. Analysis includes linear direct x linear residual interaction. Designs given for n = 4, 5. Type VIII: Type II designs analyzed under model for Type VII designs. Less efficiency, but designs available for all n. Type IX: Designs useful for testing more than one treatment and direct x residual interactions. Analysis for most designs includes normal equations, analysis of variance, variances of estimates, expected mean squares, efficiencies and missing value formulas. A list of designs is presented in an appendix. / Master of Science

M. S.

M. S.

The analytical study presented here is concerned with by two types of sensitivity of active vibration control of large space structures (LSS). The first one required for assessing robustness, is the sensitivity of the performance and stability of the control system to changes in structure and to model reduction. The second type is the sensitivity of the optimum design of the control system to changes in the structure. This sensitivity is of interest in assessing the need for integrated structure/control design. Three direct rate feedback (DRF) control techniques are studied for a laboratory structure which has characteristics of LSS and then compared to standard linear quadratic (LQ) control. The baseline design of each control system is obtained first and then sensitivity analysis conducted. An uncoupled DRF control law which minimized the sum of gains subject to requirements on performance was not robust to structural changes, and small changes in the structure caused notable increase in performance compared to that of the baseline design and therefore a potential gain from simultaneous structure/control design was indicated. Two coupled DRF techniques are proposed. A Minimum Force DRF (MF-DRF) law minimized maximum force of any actuator, while a Linear Quadratic DRF (LQ-DRF) law minimized the standard quadratic performance index for initial conditions in the shape of the first six natural modes. Both techniques guaranteed system stability. The LQ control law was found to be only slightly better than the simpler MF·DRF law in terms of the quadratic performance index and poorer than the LQ-DRF law. However the LQ control requires model reduction and was found to be sensitive to errors in that process. For example, the LQ design lost its stability when the structure was modified by adding a non-structural mass to it. A separate experimental study was conducted simultaneously with this study to verify theoretical results. Good agreement was found between analytical results and experimental measurements for the investigated control techniques. / Ph. D.

The Motzfeldt centre is one of four major alkaline centres belonging to the Igaliko complex of South Greenland. The melts parental to the Motzfeldt centre are interpreted from Hf isotopes to be derived form a common mantle source which experienced subsequent isotopic contamination from older crustal components during the interval between segregation and emplacement. Magmatism within the centre commenced with the emplacement of the Motzfeldt Sø Formation at 1273 ± 8 Ma. This unit is unique within the Motzfeldt intrusion as it is characterised by a high degree of textural and mineralogical variability and hosts localised Nb, Ta, U, Th, Zr and REE mineralisation associated with pyrochlore and late-stage REE bearing carbonate phases. Biotite halogen contents show that in addition to enrichment of incompatible elements the MSF and Motzfeldt centre in general is particularly rich in F. The elevated F content is inferred to have extended the crystallisation interval of the melt and facilitated fractionation down to relatively low temperatures. The unusual enrichment of F and incompatible elements in the MSF is suggested to represent the first and most evolved melts extracted from the top of a stratified storage chamber at depth. The MSF is also characterised by pervasive subsolidus alteration, giving the rock and region a striking brick red colour. Pb-Pb pyrochlore studies indicate that alteration in the formation was effectively synchronous (1267 ± 6 Ma), with the magmatic age of emplacement. Fluid inclusion studies suggest that contemporaneous to the exsolution of juvenile, high salinity, F-rich fluids was the wholesale influx of hydrothermally convected low salinity groundwaters through the formation. The presence of pervasive late-stage hematite and calcite throughout the MSF suggests that the oxidation potential of the bulk fluid increased above the hematite-magnetite buffer during the waning stages of the hydrothermal phase. Mineralisation was promoted by this shift in fluid composition, reducing the complexing potential of fluid ligands and facilitating mineralisation within the high-levels units of the intrusion where alteration is most intense. Economic mineralisation associated with the centre is inferred to be largely sourced from the parental melts, however the role the hydrothermal phase played was particularly important in locally mobilising and concentrating incompatible elements within the high-level units of the formation.