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Non-Axisymmetric Matrix Cracking And Interface Debonding With Friction In Ceramic Composites, F. S. Ji, Lokeswarappa R. Dharani

Mechanical and Aerospace Engineering Faculty Research & Creative Works

An three-dimensional analytical model based on the principle of minimum potential energy is developed and applied to determine the stress state in a discrete fiber/matrix composite cylinder subjected to axial tensile loading in the fiber direction and containing a non-symmetric transverse matrix crack and an interface debond. The friction over the debonded interface is incorporated into the analysis. The strain energy release rates associated with the matrix crack and the interface debonding under the combination of the applied load and the interface frictional force are computed. The strain energy release rate criterion has been employed to evaluate the critical applied …

Brick Versus Earth: The Construction And Destruction Of Confederate Seacoast Forts Pulaski And Mcallister, Georgia, David P. Eldridge

UNF Graduate Theses and Dissertations

The United States government created America's third coastal defense system during the early-to-mid nineteenth century based upon the recommendations of the Board of Engineers of 1816. The engineers of 1816 believed the most economical means of protecting America was the construction of large, permanent forts along key areas of America's coast.

Union forces under Brigadier General Quincy Gillmore seized Fort Pulaski in April of 1862. Pulaski was one of the most formidable forts built under the third system. Gillmore required two months to install the weapons used against Pulaski; most of the time was spent installing smoothbore Columbiads, the standard …

Guidelines For Oral Story Reading, David T. Sherman

UNF Graduate Theses and Dissertations

Guidelines for primary grade (k-3) teachers to use in oral story reading were developed as a means of increasing students' reading achievement. These guidelines were incorporated into primary grade lesson plans. Each lesson plan included a research principle which served as the lesson objective, identified a book for oral reading, and described pre, post, and during activities.

The lesson plans were pilot-tested by primary grade teachers at an elementary school site. Data were collected and analyzed to determine teacher perceptions of the effectiveness of the guidelines. This analysis indicated that the teachers perceived the guidelines to be effective. Based on …

Relations Between Social-Environmental Characteristics Of Families And Career Decision/Indecision Of Secondary Tech Prep Students, Garlon Mobley Webb

UNF Graduate Theses and Dissertations

The study examined the relations of social-environmental characteristics of families and demographic variables on career decision/indecision of 425 secondary Tech Prep students in North Florida. Career decision/indecision was the dependent variable, measured by the Career Decision Scale (Osipow, Carney, Winer, Yanico, & Koschier, 1987). Predictor independent variables included social-environmental characteristics of families as measured by the Family Environment Scale (Moos & Moos, 1981). Other predictor independent variables included academic achievement (reading comprehension and mathematics)' gender, economic disadvantage and race.

No significant mean differences were found by gender and by grade of Tech Prep students on the Certainty Scale or the …

Design And Evaluation Of An Environmental Science Curriculum For Secondary Students, Carolyn Knox Cooper

UNF Graduate Theses and Dissertations

Environmental education is becoming an increasingly important component of secondary science education as our society attempts to minimize the exploitations and damaging actions of humankind on the earth. Environmental education has evolved primarily from environmental consciousness in the 1960s to an environmentally active focus in the 1990s. This project examined the effectiveness of an environmental education curriculum that focuses on improving environmental behaviors and attitudes as well as knowledge.

The review of the literature for this project indicates that responsible environmental behaviors are linked to four types of environmental education categories. These categories are hierarchical and include: 1) ecological concepts, …

African Family And Kinship, Brian Siegel

Anthropology Publications

No abstract provided.

The Philosopher's Stone, Philosophical Discussion Group, Armstrong State University

The Philosopher's Stone

No abstract provided.

Three-Dimensional Segmentation And Visualization Of Magnetic Resonance Imaging Data, William L. Bell Jr.

UNF Graduate Theses and Dissertations

In this thesis, I shall study and compare various methods for manipulating two- and three-dimensional image data produced with a nuclear magnetic resonance scanner. In particular, I will examine ways of focusing upon specific structures internal to the object under study (segmentation); and will explore means of rendering realistic images of these structures on a computer screen using depth-cueing, shading, and ray-casting techniques.
The 3DHEAD volumetric dataset used for this project was created with the Siemens Magnetom and was provided courtesy of Siemens Medical Systems, Inc., Iselin, NJ. This dataset consists of 109 slices of a human head, with each …

University Statistical Abstract 1996, University Of North Florida

University Statistical Abstracts

The University Statistical Abstract (USA) is a collection of informational reports presented in one single source. Serving as a primary planning source document, the USA contains information spanning many University functions: Students, Employees, Budget, Other Resources.

The function of this document is to serve the wide-spread informational needs associated with Institutional, College, Division and Unit planning, program review and institutional research. Also called University of North Florida University Statistical Abstract.