Digital Commons Network^™

Dynamic Analysis Of Structures With Solid-Fluid Interaction, Rennee Ramona Pedrido

Dissertations

Interaction between solid and fluid has been recognized to be an important factor in the areas of aeroelasticity, hydroelasticity, and the study of flow-induced vibration in nuclear reactor components. This study develops a finite element model for interaction between an elastic solid and a fluid medium. Plane triangular finite elements have been used separately for fluid, solid, and solid-fluid continua and the equivalent mass, damping, and stiffness matrices and interaction load arrays for all elements are derived and assembled into global matrices. The global matrix differential equation of motion developed is solved in time to obtain the pressure and velocity …

A Comparison Of Responses Of Male And Female High School Graduates To Indicators Of Quality Of Life And Career Satisfaction, Deanne Lee Buckendorff Byerly

Dissertations

No abstract provided.

Thermal Stratification And Circulation Of Water Bodies Subjected To Thermal Discharge, Mohammad A. Borhani

Dissertations

A three-dimensional analytical model for large water bodies is presented. Time histories and spatial distribution of pressure, velocity and temperature in water bodies, subjected to thermal discharge, are determined employing a digital computer. The dynamic response is obtained for a rectangular water body by applying a finite difference method to the mass, momentum and energy balance equations. These partial differential equations are algebraically manipulated to obtain; 1) three parabolic differential equations integrated temporally to find the horizontal velocity components and temperature; 2) one algebraic integral equation to get the vertical velocity component; 3) one elliptic differential equation integrated spatially to …

Developmental Logic, Harvey Jack Schiller

Dissertations

No abstract provided.

Factors Important To The Vocational Development Of Women Police Officers, Carol Ann Martin

Dissertations

Problem

The contributions policewomen have made in the relatively short period of their existence have led many police departments to regard women as an indispensable part of the American police force. During the last nine years a large variety of opportunities have become available to women police officers. Women have been added as sworn police officers not only in the small departments but in large departments and federal agencies as well. For the female interested in becoming a policewoman, as far as the administrator concerned with staffing his department with qualified females, there is a paucity of information available on …

A Study Of Curricular And Spatial Characteristics Of Selected Public And Private Secondary School Facilities Constructed From 1967 Through 1976 In Puerto Rico, Manuel Velazquez Jr.

Dissertations

Problem. The purpose of this study was to evaluate the spatial allocation for curricular purposes and the special features of each of the twenty-seven public and private secondary schools built in Puerto Rico during the years 1967-1976. The problem was: Were these schools being constructed in accordance with the desired curriculum; was the curriculum an outgrowth of the resulting physical structures, or were the curriculum and the planning of the structures unrelated? -- Method. The spaces within the building were grouped into three major categories: (a) classrooms and laboratories; (b) special facilities; and (c) operation and services facilities. In order …

Japanese American Experiene Of Misei Parents And Their Sansei Children And Implications For Education, Seiichi Michael Yasutake

Dissertations

No abstract provided.

Emile Boutmy: The Political Education Of The Third Republic, Louis J. Voskuil

Dissertations

No abstract provided.

An Examination Of Executive Development Programs In Private Illinois Colleges And Universities, Thomas E. Murray

Dissertations

No abstract provided.

The Effectiveness Of Career Awareness Workshops With Fifth Grade Girls, Jane M. Podall

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No abstract provided.

A Study Of Field Dependence-Independence, Selected Curricular Choices And Preferred Guidance Strategies Of Adult, Evening College Students, Richard Donald Decosmo

Dissertations

No abstract provided.

An Exploratory Assessment Of The Effects Of Specified Cultural And Environmental Factors On The Performance Of Nigerian Students On Selected Verbal And Nonverbal Aptitude Tests Developed For Use In Western Countries, Victoria Belle Chigoziri Iwuji

Dissertations

No abstract provided.

The Indian Policy Of Porfirio Diaz In The State Of Yucatan, 1876-1910, Carol L. Carbine

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No abstract provided.

Education And Social Mobility In Tamil Nadu, India: An Empirical Study Of Intergenerational Occupational Mobility And Occupational Aspiration, Savarimuthu Savarimuthu

Dissertations

No abstract provided.

An Investigation Of The Interaction Of Educational Cognitive Style, Teaching Style, And Instructional Area For Selected Community College Instructors, Francis W. Crookes

Dissertations

No abstract provided.

Application Of Multilevel Control Techniques To Classes Of Distributed Parameter Plants, Frederick Donald Chichester

Dissertations

This study concerns the application of a combination of multilevel hierarchical systems analysis techniques and Pontryagin's minimum principle (multilevel control) to the problem of controlling optimally two classes of dynamic distributed parameter plants representing concentrations balances in streams, rivers and estuaries. The concentrations treated in this study are those deemed the most effective indicators of water quality, dissolved oxygen (DO) and biochemical oxygen demand (BOD).

One class of plants treated in this study consists of linear continuous distributed parameter plants represented mathematically by sets of simultaneous partial differential equations. Optimal control of a plant of this class is initiated by …

Sodium-Initiated Polymerization Of Alpha-Methylstyrene In The Vicinity Of Its Reported Ceiling Temperature, Shuenn-Long Ou

Dissertations

No abstract provided.

Political And Social Attitudes Among The Unemployed: A Marxist Analysis, Richard Henry Ropers

Dissertations

No abstract provided.

Biota And Environment Of The Muskegon, Michigan, Combined Industrial And Municipal Wastewater Storage Lagoons, W. Randolph Frykberg

Dissertations

No abstract provided.

The Effects Of Optical Path Perturbations During Recording On A Reconstructed Holographic Image, Stevan Israel Feldman

Dissertations

The effects of optical path perturbations occurring during recording on the reconstructed image of a hologram are investigated. It is shown that such variations of optical path are equivalent to conditions of holographic interferometry which can be classified in three categories: 1) object motion alone, 2) film motion alone, and 3) simultaneous film and object motion; all motions are defined with respect to the stationary reference source during the recording of the hologram.

The theory concerning the effects of object motion alone on the radiance distribution of a reconstructed holographic image has already been developed by previous researchers and is …

Distributed Parameter Sensitivity Theory To Solve Certain Reliability Problems, Moses Nee Buernor Ayiku

Dissertations

It is well known that in actual control systems there are uncontrolled parameter changes caused by aging of elements, temperature, pressure and effects of externalmedium, among others, which may impair the performance ofthe system. Hence, there is the need to develop systems that weakly react to these parameter fluctuations. Sensitivity theory has been developed to study some of these problems. Most of the investigations in this area, however, deal with problems in continuous systems modeled by ordinary differential equations. Even the recent publications on sensitivity problems in distributed parameter control systems are largely concerned with systems modeled by first order …

Investigation And Optimum Design Of The Generalized Second-Order Phase-Locked Loop, William Allen Novick

Dissertations

In this dissertation, a second-order phase-locked loop (PLL) in which the loop filter contains complex zeros is investigated in both its linear and nonlinear modes of operation; prior designs used a filter containing a simple zero on the negative real axis. This "generalized" second-order PLL had been heretofore essentially unexplored.

The basic characteristics of the generalized second-order PLL operating in the linear mode including the open and closed-loop responses and the corresponding root locus were generated and compared against those of the conventional second-order PLL. As in the conventional case, the generalized second-order PLL is found to be unconditionally stable. …

Preparation And Magnetic Properties Of Rare Earth Garnets And Apatites, Rostam Mondegarian

Dissertations

It has been found possible to prepare garnets with magnetic trivalent rare earth ions filling all or most dodecahedral sites while nonmagnetic Sc³⁺ ions fill all octahedral sites and magnetic Fe³⁺ ions fill all or most tetrahedral sites. Phase-pure garnets found include {RE_3-ySc_y}[Sc₂](Fe₃)O₁₂, where RE is Sm, Eu, Gd, Tb or Dy and y can be zero with Sm and Eu; {Nd₃}[Sc₂](Fe_zGa_3-z)O₁₂; and other Nd-Sc-Fe garnets of the type {Nd_3-(w+y)M_wS_cy}[Sc₂](Fe …

Separations Of Multicomponent Mixtures Via Thermal Parametric Pumping, John Daniel Stokes

Dissertations

This dissertation covers the separation of solutes from multicomponent solutions via direct mode thermal parametric pumping.

Dilute solution separations were predicted from existing binary equations by assuming the existence of pseudo binary systems, each system consisting of one solute and the common solvent. Two systems, toluene-aniline-n-heptane and toluene-acetophenone-n-heptane with a silica gel adsorbent were used to experimentally demonstrate the separation. Experimental results were in good agreement with the mathematical predictions.

For concentrated multicomponent solutions, the separation was demonstrated by the system, toluene-acetophenone-n-heptane on silica gel. The effects of mass transfer and nonlinear adsorption isotherms became significant and a numerical solution …

A Study Of The Relationship Of Cognitive Similarity To Communication Accuracy, Shirley C. Woodworth

Dissertations

No abstract provided.

The Relation Of Personal Values And Value Disclosure To A Faculty Member's Influence On Students, Donald T. Van Hoeven

Dissertations

No abstract provided.

Self-Concept And Achievement: A Cross-Cultural Validation Study In Germany And The United States, Donald F. Depew

Dissertations

No abstract provided.

An Historical Analysis Of The Fellowships Programs At The Johns Hopkins University, 1876-1889: Daniel Gilman's Unique Contribution, Arthur Serfass Eichlin

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No abstract provided.

Trends In Accountability And Educational Assessment Through State Legislative Action, William Bernard Thiel

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No abstract provided.

A Study To Assess Career Choice Certainty Among Community College Students, James Murray

Dissertations

No abstract provided.