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Articles 15151 - 15180 of 15334
Full-Text Articles in Entire DC Network
Achievement Orientation: Origins, Influences, And Outcomes, Wendy Colleen Chambers
Achievement Orientation: Origins, Influences, And Outcomes, Wendy Colleen Chambers
Electronic Theses and Dissertations 1990 - 1999
Adolescent orientation toward achievement is hypothesized to be composed of motivation, school achievement, and family values. Previous studies suggest that ability and effort, internal and external orientations, and the intellectual and cultural environment of the family were found to affect adolescent orientation toward achievement. A study was conducted to further explore these proposed components of achievement and reveal the origins, influences, and outcomes of achievement orientation. African-American, Anglo-American, and Hispanic-American sixth grade students were administered multiple questionnaires that addressed different aspects of achievement orientation. After focus groups identified any biased and confusing items, factor analyses were conducted on the instruments. …
Adolescent Trauma: Motor Vehicle Crashes While Under The Influence, Nora Beatrice Davis
Adolescent Trauma: Motor Vehicle Crashes While Under The Influence, Nora Beatrice Davis
Electronic Theses and Dissertations 1990 - 1999
The purpose of this study was to identify and describe the outcome of adolescent trauma victims with positive toxicology screening who were involved in motor vehicle crashes. This was a retrospective study conducted at an urban Level I trauma center. A sample of 134 subjects with positive toxicology screen, ages 15 to 25, for the period January 1993 to December 1996, were included in the study. Outcome, sex, age, injury severity score, length of stay, and hospital cost were analyzed by multiple regression. A significant relationship between sex, age, injury severity, length of stay, and hospital cost was established (p …
A Comparison Of Elderly Migration Streams In The United States: 1970 And 1990, Christopher J. Schiavone
A Comparison Of Elderly Migration Streams In The United States: 1970 And 1990, Christopher J. Schiavone
Electronic Theses and Dissertations 1990 - 1999
Over the past century, the elderly have been a growing proportion of the total population in the United States. Due to this, geographers have given increasing amount of attention to the study of the elderly. One of the areas where geography has made substantial contributions is in examining the concentration and spatial distribution. Two processes effect the spatial distribution: aging in place and migration. Historically, the origin and destination streams of interstate migrants have been highly concentrated; however, the destinations are now becoming more diffuse.
A Comparison Of Interpersonal Communication Style And Relationship Satisfaction Of Academic And Student Affairs Administrators In Two-Year Colleges, Patricia Jean Anderson
A Comparison Of Interpersonal Communication Style And Relationship Satisfaction Of Academic And Student Affairs Administrators In Two-Year Colleges, Patricia Jean Anderson
Electronic Theses and Dissertations 1990 - 1999
The purpose of this dissertation was to compare the communication style of academic and student affairs administrators and to determine whether these administrators were satisfied with their mutual relationship. The study was conducted among 109 chief academic and student affairs administrators in two year colleges from five states who took the Myers-Briggs Type Indicator (MBTI) and the researcher's Relationship Satisfaction Survey. Oneway analysis of variance and the Selection Ratio Type Table were used to compare responses by groups of academic or student affairs administrators on MBTI scales of sensing or intuition and thinking or feeling. Oneway analysis of variance was …
All The Kaiser's Men: German Volunteers And The Great War, 1914-1918, Michael Brian Petersen
All The Kaiser's Men: German Volunteers And The Great War, 1914-1918, Michael Brian Petersen
Electronic Theses and Dissertations 1990 - 1999
Since its end, scholars and historians have viewed World War I primarily in terms of its impact upon the military and diplomatic spheres of European life and have also made attempts to determine responsibility for starting the war. What has been largely ignored is the plight of those who did the fighting--especially German volunteer soldiers. These young men enlisted in the war effort because of a concrete set of assumptions that were later radicalized during the war experience, which was characterized by seemingly endless labor and episodic periods of extreme violence. This transformation of beliefs had a profound impact upon …
Analysis Of The Utility Of A Normalized Difference Vegetation Index For Inventorying Urban Greenspace, Thomas J. Dobbs
Analysis Of The Utility Of A Normalized Difference Vegetation Index For Inventorying Urban Greenspace, Thomas J. Dobbs
Electronic Theses and Dissertations 1990 - 1999
Satellite derived vegetative data of urban areas is normally classified into several classes of trees, fields, grass and bare soil using unsupervised and supervised classification methods. Normalized Difference Vegetation Indexes (NDVI) have traditionally been applied to agricultural satellite images to assess the health and maturity of commercial crops. When a NDVI is used to examine urban vegetation, many discrete data values are generated which can be differentiated into meaningful vegetation classes.
Application Of Fuzzy Logic For The Solution Of Inverse Kinematics And Hierarchical Controls Of Robotic Manipulators, David William Howard
Application Of Fuzzy Logic For The Solution Of Inverse Kinematics And Hierarchical Controls Of Robotic Manipulators, David William Howard
Electronic Theses and Dissertations 1990 - 1999
In this thesis work, hierarchical control techniques will be used for controlling a robotic manipulator. The hierarchical control will be implemented with fuzzy logic to improve the robustness and reduce the run time computational requirements. Hierarchical control will consist on solving the inverse kinematic equations using fuzzy logic to direct each individual joint. A commercial Micro-robot with three degrees of freedom will be used to evaluate this methodology. A decentralized fuzzy controller will be used for each joint, with a Fuzzy Associative Memories (FAM) performing the inverse kinematic mapping in a supervisory mode. The FAM determines the inverse kinematic mapping …
Adolescent Relationships And Their Contributions To Social And Academic Competence, Vonda Dionne Jones-Hudson
Adolescent Relationships And Their Contributions To Social And Academic Competence, Vonda Dionne Jones-Hudson
Electronic Theses and Dissertations 1990 - 1999
School success is associated with parent- and peer-relationships. To study the connection between these alliances and school success, 30 African-American and 30 European-American 6th graders were given the Relationship Closeness Inventory, Network of Relationships Inventory, Self-Perception Profile, Revised Class Play, and Youth Self-Report. A parent and best friend also completed surveys. Results show parent and peer support relates to the social competence of youth. Father support is associated with female aggressive-disruptive behavior, and best friend support is associated with sensitive-isolated behavior in boys. African-American parents do more social events with their children than European-American parents do with their children. European-Americans …
Automatic Design Of Nonlinear Controllers With Optimal Global Performance Using Best Estimate-Directed Search And Continued Propagation Cell Mapping, Charbel George Rizk
Automatic Design Of Nonlinear Controllers With Optimal Global Performance Using Best Estimate-Directed Search And Continued Propagation Cell Mapping, Charbel George Rizk
Electronic Theses and Dissertations 1990 - 1999
The problem at hand is developing a controller design methodology that is generally applicable to autonomous systems with fairly accurate models. The controller design process has two parts: synthesis and analysis. Over the years, many synthesis and analysis methods have been proposed. An optimal method for all applications has not yet been found. Recent advances in computer technology have made computational methods more attractive and practical. The proposed method is an iterative computational method that automatically generates non-linear controllers with specified global performance. This dissertation describes this method which consists of using an analysis tool, continued propagation cell mapping (CPCM), …
Applications Of Evolutionary Algorithms In Mechanical Engineering, Kevin M. Nelson
Applications Of Evolutionary Algorithms In Mechanical Engineering, Kevin M. Nelson
Electronic Theses and Dissertations 1990 - 1999
Many complex engineering designs have conflicting requirements that must be compromised to effect a successful product. Traditionally, the engineering approach breaks up the complex problem into smaller sub-components in known areas of study. Tradeoffs occur between the conflicting requirements and a sub-optimal design results. A new computational approach based on the evolutionary processes observed in nature is explored in this dissertation. Evolutionary algorithms provide methods to solve complex engineering problems by optimizing the entire system, rather than sub-components of the system. Three standard forms of evolutionary algorithms have been developed: evolutionary programming, genetic algorithms and evolution strategies. Mathematical and algorithmic …
Biosynthetic Production Of Marine-Derived Anti-Tumor Ecteinascidins And The Aquaculture Of The Marine Tunicate Ecteinascidia Turbinata, Joann Mary Krenisky
Biosynthetic Production Of Marine-Derived Anti-Tumor Ecteinascidins And The Aquaculture Of The Marine Tunicate Ecteinascidia Turbinata, Joann Mary Krenisky
Electronic Theses and Dissertations 1990 - 1999
A family of tetrahydroisoquinoline alkaloids, the ecteinascidins, are a group of biologically active secondary metabolites produced by the marine tunicate Ecteinascidia turbinata. Ecteinascidins have shown in vivo anti-tumor activity against P388 lymphoma, B16 melanoma, M5076 ovarian sarcoma, Lewis lung carcinoma, and LX-1 human lung and MX-1 human mammary carcinoma xenografts in laboratory mice. Because ecteinascidins are produced in low yields, 1x10^-4%, supply for clinical development is a significant problem. The ultimate goal of this study is to develop an enzyme-based synthesis of the ecteinascidins. In this regard, the biosynthesis of these alkaloids has been investigated. Optimal conditions for in vitro …
An Evaluation Of Post-Classification Comparison For Historical Land Information Systems, Richard Scott Roberts
An Evaluation Of Post-Classification Comparison For Historical Land Information Systems, Richard Scott Roberts
Electronic Theses and Dissertations 1990 - 1999
The population of southeast Florida has grown considerably since the 1940's. Managing this population growth has challenged urban planners and growth managers. Prior to 1970, geographers and cartographers struggled with mapping this area as the landscape underwent rapid transformation to accommodate millions of new residents. With the launch of the Landsat satellite series in 1972, digital satellite images of southeast Florida have been acquired every 18 days to provide geographers and cartographers with a new tool for monitoring land use change. This thesis examines the utility of using this new tool combined with historical aerial photographs to document land use …
Beyond Belles: Confederate Women In Hospital Work, Teri Ann Finder
Beyond Belles: Confederate Women In Hospital Work, Teri Ann Finder
Electronic Theses and Dissertations 1990 - 1999
Southern women during the American Civil War performed a vital function by producing supplies for the Confederate hospitals and assisting with the treatment of the wounded. Most women did not challenge the male dominated social structure of the South. They worked within ladies aid societies to establish and supply Confederate hospitals. A small group of women challenged the existing myth of southern womanhood by becoming official matrons of the Confederate Medical Department. These women accepted a position that required self confidence, stamina, self sacrifice and skill. Black women and Catholic nuns also made significant contributions to the treatment of the …
Biosynthetic Studies Of The Bryostatins, Anticancer Agents From The Marine Bryozoan Bugu/A Neritina, Joseph Lawry
Biosynthetic Studies Of The Bryostatins, Anticancer Agents From The Marine Bryozoan Bugu/A Neritina, Joseph Lawry
Electronic Theses and Dissertations 1990 - 1999
The bryostatins are a family of macrolide lactones isolated from the marine bryozoan Bugu/a neritina. Since its detection in 1968, bryostatin 1 has demonstrated remarkable anticancer, immunopotentiating, biomodulatory and radioprotective effects which result mainly from its ability to activate protein kinase C, a family of isozymes involved in cellular signal transduction. It is currently being tested in several phase I and phase II clinical trials as a potential anticancer drug for leukemia, melanoma and nephrotoma. A series of experiments was undertaken to elucidate the biosynthetic origins of bryostatin, using a fortified crude cell-free enzyme preparation and radiolabelled precursors. A regional …
Balanced Hypercube: A Versatile Cube-Based Multicomputer System, Ke. Huang
Balanced Hypercube: A Versatile Cube-Based Multicomputer System, Ke. Huang
Electronic Theses and Dissertations 1990 - 1999
We propose the balanced hypercube (BH), which is a variant of the standard hypercube (Q), as a multicomputer topological structure. An n-dimensional balanced hypercube BHn has the same desirable topological properties of the 2n-dimensional standard hypercube Q2n such as size (2^2n nodes and n2^2n edges), regularity and symmetry, connectivity (2n node-disjoint pathes between any pair of nodes), and diameter (2n when n = 1 or n is even). Moreover, BHn has smaller diameter (2n-1) than Qn's (2n) when n is odd other than 1. In addition, BHn is load balanced, i.e., for every node v of BHn, there exists another …
Calibration Of Seepage From Steady State Simulation For Water Budget Estimation, Angela Alvarez Prymas
Calibration Of Seepage From Steady State Simulation For Water Budget Estimation, Angela Alvarez Prymas
Electronic Theses and Dissertations 1990 - 1999
Water gain/loss through seepage in the Everglades Nutrient Removal (ENR) project is a major component of the water budget. Seepage is the most difficult component to evaluate because most of its constituents cannot be directly measured. For this reason simulations from models or equations are the common procedure to estimate seepage. These procedures involve a series of assumptions and simplifications (i.e., geometry, soil parameters), which can be validated with a calibration-verification process. The accuracy of the water budget for this wetland treatment is very important because it will help to clarify and quantify, together with the nutrient mass budgets, the …
Behavior Of Eccentrically Loaded Slender Concrete Columns Reinforced With Cfrp Bars, Wei. Xia
Behavior Of Eccentrically Loaded Slender Concrete Columns Reinforced With Cfrp Bars, Wei. Xia
Electronic Theses and Dissertations 1990 - 1999
In a highly corrosive environment, corrosion is the main factor leading to deterioration and eventual failure of conventional reinforced or prestressed concrete structures. Carbon Fiber Reinforced Plastics (CFRP) are considered as an alternative to steel reinforcement due to its excellent corrosion resistance. This investigation was conducted to establish the feasibility of using CFRP cables as reinforcing elements in reinforced concrete columns. Besides investigating durability of CFRP cables in adverse environments (alkali and sea water) experimental and theoretical studies were carried out to study the behavior of CFRP reinforced concrete slender columns under combined axial load and bending moment. Exposure to …
Cathodic Polarization Behavior Of Mild Steel Exposed To Selected Flow Velocities And Slope Parameters In Natural Seawater, G. Dickson Iv Hugus
Cathodic Polarization Behavior Of Mild Steel Exposed To Selected Flow Velocities And Slope Parameters In Natural Seawater, G. Dickson Iv Hugus
Electronic Theses and Dissertations 1990 - 1999
Twenty-four test cells arranged in a pipe flow setup were assembled to investigate the effect of seawater velocity on the polarization behavior of galvanically polarized mild steel. Each 1023 steel pipe specimen of 10.8 em ID was coupled via a current limiting resistor to a mercury activated aluminum anode and exposed to a velocity of either 0.03, 0.09 or 0.30 m/s. The resistors were sized such that polarization was controlled according to one of six slope parameters. Steady state potential and maintenance current density values were determined, and a steady state potential vs. current density curve was established for specimens …
Changes In Photoemission Spectra Across The Order/Disorder Transition In Copper-Gold Alloys, Wei Liu
Changes In Photoemission Spectra Across The Order/Disorder Transition In Copper-Gold Alloys, Wei Liu
Electronic Theses and Dissertations 1990 - 1999
Ultra-violet photoemission spectroscopy has been used in this project to investigate the changes in photoemission spectra across the order/disorder transition in Cu-Au alloys. Many obvious changes are observed in the valence band spectra of the different phases, particularly in the area of Au-related states. In Cu3Au, the binding energy of Au-4f core levels in the ordered phase are shifted from the pure metal value by an average of 0.46 +- 0.05eV to increased binding energy. In CuAu, the corresponding shift value in the ordered phase is 0.33 +- 0.05eV, also to increased binding energy. In both disordered Cu3Au and CuAu …
Children's Temperament: Does It Predict How Children Cope During Conflicts With Parents?, Gordon Bryant Iii Zellers
Children's Temperament: Does It Predict How Children Cope During Conflicts With Parents?, Gordon Bryant Iii Zellers
Electronic Theses and Dissertations 1990 - 1999
The purpose of this study was to explore relations between children's temperament and their coping styles during mother-child conflict. The children in this study (47 boys and 59 girls in the fourth through seventh grades) were measured using maternal reports of nine discrete temperament dimensions. These nine dimensions were reduced to three factors labeled Agreeableness, Rhythmicity, and Restraint. The children also reported on seven dimensions of coping during conflict with their mothers. Factor analysis indicated that these seven dimensions also could be reduced to two factors, labeled Defiant Coping and Helpless Coping. Partial correlations (with the effect of age removed) …
Comparison Between Florida State University System's Female Administrators And Female Faculty In Their Personal Attributes And Self-Efficacy Beliefs, Rosanna Star Berzok
Comparison Between Florida State University System's Female Administrators And Female Faculty In Their Personal Attributes And Self-Efficacy Beliefs, Rosanna Star Berzok
Electronic Theses and Dissertations 1990 - 1999
The purpose of this study was to determine whether significant differences existed between female administrators and female faculty in public higher education in their perceptions of personal self-efficacy and their personal attributes. This was achieved by examining the relationship between the criterion variable, position held by females in higher education and the predictor variables, which included male and female characteristics, general self-efficacy beliefs, and social self-efficacy beliefs. A survey package including a demographics section, Personal Attributes Questionnaire (PAQ) and Self-Efficacy Scale for Adults (SES) was mailed to 200 female administrators and 200 female faculty employed by Florida's State University System. …
Colonization Of Infauna And Fiddler Crabs In A Newly Constructed Mangrove Environment, Christie Bunting Mcvay
Colonization Of Infauna And Fiddler Crabs In A Newly Constructed Mangrove Environment, Christie Bunting Mcvay
Electronic Theses and Dissertations 1990 - 1999
Colonization of infauna in a newly constructed mangrove environment at Spanish River Park, Boca Raton, Florida was studied for six months following initial site preparation. Monthly core samples for benthic invertebrates were collected from December 1994 to June 1995. Sampling stations were chosen randomly each month in three zones along two transects across a tidal channel: upper mangrove, lower mangrove, and mangrove/Spartina. Fiddler crab burrows were counted within randomly placed square meter quadrats in each zone. Rapid succession over short-term indicated the constructed environment would eventually become an established, functional mangrove community. Natural infaunal colonization began immediately, and a total …
Community Representation In The Planning Process And Its Impact On The Landscape: A Study Of The South Dade U.S. 1 Corridor Project, Martin A. Schneider
Community Representation In The Planning Process And Its Impact On The Landscape: A Study Of The South Dade U.S. 1 Corridor Project, Martin A. Schneider
Electronic Theses and Dissertations 1990 - 1999
This thesis looks at how political decisions influence the design and outcome of planning processes and how these decisions influence the urban landscape. This study looks at one specific planning process and compares the results of two different planning workshops to show how differences in representation and information dissemination can lead to different outcomes. The first workshop had broad representation and was educated by planning experts, while the second consisted of only local community representatives and was not influenced by planning professionals. Although similar, each workshop had different visions and different priorities. This shows that participatory processes have to be …
Convergence Properties Of The Screened Korringa-Kohn-Rostoker Method, Nassrin Y. Moghadam
Convergence Properties Of The Screened Korringa-Kohn-Rostoker Method, Nassrin Y. Moghadam
Electronic Theses and Dissertations 1990 - 1999
Within the Green's function approach to the multiple scattering theory, we present a different formalism for the screened Korringa-Kohn-Rostoker (KKR) scheme. In addition, we investigate the convergence properties of the screened KKR by performing total energy and density of states calculations for a fcc copper. Finally, we introduce a new approach to (near) tight binding calculations of the screened tau-matrix that yields total energies within the desired accuracy.
Control Of Response Of Tall Multi-Story Buildings Under Wind Excitation, Xin. Qiu
Control Of Response Of Tall Multi-Story Buildings Under Wind Excitation, Xin. Qiu
Electronic Theses and Dissertations 1990 - 1999
Theoretical investigation is carried out into the extent to which floor accelerations of a wind-excited tall building can be reduced by increasing damping in those components in a building which are generally regarded to be non-structural elements, and by using active control. The wind loads are modeled as stochastic processes, which are correlation-stationary in time. Only the drag wind forces are considered in the analyses. The spectral densities and cross-spectral densities of two commonly used models, proposed by Davenport and by Simiu, are compared. The Davenport spectrum is used in the numerical calculation for illustration purposes. Several structural models are …
Correctness Analysis Of Cache Conherence Protocols Using Petri Nets, Ahmed Kamal Hassan
Correctness Analysis Of Cache Conherence Protocols Using Petri Nets, Ahmed Kamal Hassan
Electronic Theses and Dissertations 1990 - 1999
The use of cache memories in multiprocessor systems increases the overall systems performance. Caches reduce the amount of network traffic and provide a solution to the memory contention problem. However, caches introduce memory consistency problems. The existence of multiple cache copies of a memory block will result in an inconsistent view of memory if one processor changes a value in its associated cache. Cache coherence protocols are algorithms designed in software or hardware to maintain memory consistency. With the increased complexity of some of the more recent protocols, testing for the correctness of these protocols becomes an issue that requires …
'Delicious Riot Of Things': Aspects Of Discontinuity In "Tristram Shandy", William B. Gerard
'Delicious Riot Of Things': Aspects Of Discontinuity In "Tristram Shandy", William B. Gerard
Electronic Theses and Dissertations 1990 - 1999
Tristram Shandy is a famously formless text in which the "life and opinions" of the title character appear to spill forth from the narrator without a governing theme or structure. Chronology and plot are interrupted and re-ordered. Characters are defined as mere fragments of personality, "strokes of a pen"; objects are represented as broken, snarled, and discombobulated. The subtexts and digressive tales included within the novel are incomplete as well as disruptive of the larger whole. Sterne withholds the "complete" picture a conventional novel provides, and fragmentation becomes the prevailing motif of his book: the author's motley meaning lies hidden …
Culturally Derived Watersheds And Their Effect On The Spectral Signatures Of Vegetation In The Dupuis Reserve, Eric James Householder
Culturally Derived Watersheds And Their Effect On The Spectral Signatures Of Vegetation In The Dupuis Reserve, Eric James Householder
Electronic Theses and Dissertations 1990 - 1999
Like so many natural areas in south Florida, the Dupuis Reserves' landscape has gone through extreme alteration due to numerous cultural activities. Activities including drainage, cattle ranching, and citrus farming have altered the reserves natural hydrology causing the formation of several watersheds. This hydrologic alteration has caused the once homogenous ecosystem to fragment into two separate landscapes: one dominated by drainage and human impact while the other remains in a relatively natural state. This study will attempt to determine, with the use of remote sensing, geographic information systems and digital image classifications if culturally derived watersheds cause significant change in …
Data And Information Communication Through Piping Network, Moutia Elhoussain El
Data And Information Communication Through Piping Network, Moutia Elhoussain El
Electronic Theses and Dissertations 1990 - 1999
The purpose of this thesis is to investigate the ability of using piping networks as a communication channel using power line communication transceivers. Two ways by which a piping network is able to propagate waves are investigated. The first wave propagation method is through the pipe shell. Using structural waves and PZT type transducers, data packets are sent and received through the propagation of structural waves in the pipe shell. However, because of the dispersive behavior of quasi flexural radial waves, the data packets are distorted. The second wave propagation method explored is acoustic waves in the enclosed fluid. The …
Determination Of Wetland Impact Due To Groundwater Drawdown: The Application Of Aerial Photo-Interpretation, Gis Analysis, And Groundwater Modeling, Tobin Hindle
Electronic Theses and Dissertations 1990 - 1999
Aerial photo-interpretation, GIS analysis, and groundwater modeling were employed to determine the impact of permitted groundwater withdrawal, primarily for agricultural irrigation, on protected wetland communities within Jonathan Dickinson State Park (JDSP), Martin County Florida. Since 1952, much of the wetland habitat has succeeded to terrestrial pine flatwoods in the southwestern section of the wilderness preserve of JDSP. The drying trend can not be linked to natural hydrologic impact, but strongly correlates to groundwater drawdown calculated using a three-dimensional groundwater computer model.