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Articles 23611 - 23640 of 35668
Full-Text Articles in Entire DC Network
An Investigation Into The Predictors Of Adoption And Utilization Of Information-Sharing Networks By Local Law Enforcement In Three States, Joe Conrad Saviak
An Investigation Into The Predictors Of Adoption And Utilization Of Information-Sharing Networks By Local Law Enforcement In Three States, Joe Conrad Saviak
Electronic Theses and Dissertations
ABSTRACT A major change in longstanding police organizational behavior is increasingly evident in the recent emergence of computerized information-sharing networks in public safety. From both theoretical and empirical perspectives, a better understanding of the determinants that can explain and predict the rise and growth of this new and significant development in American policing is needed. A highly limited body of empirical studies has endeavored to validate effective predictors of adoption and utilization of electronic information-sharing networks by local law enforcement agencies. Utilizing an integrated theoretical framework largely built upon Rogers' diffusion of innovations theory, sixteen hypotheses were tested through logistic …
Virtual Vistas: High School Students Describing Their Experiences In Online Courses., Amy Scheick
Virtual Vistas: High School Students Describing Their Experiences In Online Courses., Amy Scheick
Electronic Theses and Dissertations
Current research indicates that distance education courses can be as effective as traditional courses when the method and technologies used are appropriate to the instructional tasks. The number of states, counties, and school districts that provide online courses for high school students has rapidly expanded during the last ten years. The number of students, who enroll in these courses, has often grown by double digits each year. Understanding K-12 students' experiences in, and expectations of, online learning is important for many reasons. Online learning is certainly growing and may become a graduation requirement in more states. Currently Michigan requires every …
Novel Facial Image Recognition Techniques Employing Principal Component Analysis, Moataz Mahmoud Abdelwahab
Novel Facial Image Recognition Techniques Employing Principal Component Analysis, Moataz Mahmoud Abdelwahab
Electronic Theses and Dissertations
Recently, pattern recognition/classification has received considerable attention in diverse engineering fields such as biomedical imaging, speaker identification, fingerprint recognition, and face recognition, etc. This study contributes novel techniques for facial image recognition based on the Two dimensional principal component analysis in the transform domain. These algorithms reduce the storage requirements by an order of magnitude and the computational complexity by a factor of 2 while maintaining the excellent recognition accuracy of the recently reported methods. The proposed recognition systems employ different structures, multicriteria and multitransform. In addition, principal component analysis in the transform domain in conjunction with vector quantization is …
Modeling Free Chlorine And Chloramine Decay In A Pilot Distribution System, Jorge Miguel Arevalo
Modeling Free Chlorine And Chloramine Decay In A Pilot Distribution System, Jorge Miguel Arevalo
Electronic Theses and Dissertations
The purpose of this study was to identify the effect that water quality, pipe material, pipe size, flow conditions and the use of corrosion inhibitors would have on the rate of free chlorine and chloramine decay in distribution systems. Empirical models were developed to predict the disinfectant residual concentration with time based on the parameters that affected it. Different water treatment processes were used to treat groundwater and surface water to obtain 7 types of finished waters with a wide range of water quality characteristics. The groundwater was treated either by conventional treatment by aeration (G1) or softening (G2) or …
Soft Switching Multi-Resonant Forward Converter Dc To Dc Application For Communications Equipment, David Marlin Bills
Soft Switching Multi-Resonant Forward Converter Dc To Dc Application For Communications Equipment, David Marlin Bills
Electronic Theses and Dissertations
In the field of power electronics there is always a push to create smaller and more efficient power conversion systems. This push is driven by the industry that uses the power systems, and can be realized by new semiconductor devices or new techniques. This examination describes a novel technique for a small and highly efficient method of converting relatively high DC voltage to a very low voltage for use in the telecommunications industry. A modification to the standard Forward Resonant converter results in improvements in component stress, system efficiency, response time, and control circuitry. This examination describes background information needed …
Impact Of Zinc Orthophosphate Inhibitor On Distribution System Water Quality, Xiaotao Guan
Impact Of Zinc Orthophosphate Inhibitor On Distribution System Water Quality, Xiaotao Guan
Electronic Theses and Dissertations
This dissertation consists of four papers concerning impacts of zinc orthophosphate (ZOP) inhibitor on iron, copper and lead release in a changing water quality environment. The mechanism of zinc orthophosphate corrosion inhibition in drinking water municipal and home distribution systems and the role of zinc were investigated. Fourteen pilot distribution systems (PDSs) which were identical and consisted of increments of PVC, lined cast iron, unlined cast iron and galvanized steel pipes were used in this study. Changing quarterly blends of finished ground, surface and desalinated waters were fed into the pilot distribution systems over a one year period. Zinc orthophosphate …
Processing And Study Of Carbon Nanotube / Polymer Nanocomposites And Polymer Electrolyte Materials, Muthuraman Harish
Processing And Study Of Carbon Nanotube / Polymer Nanocomposites And Polymer Electrolyte Materials, Muthuraman Harish
Electronic Theses and Dissertations
The first part of the study deals with the preparation of carbon nanotube/polymer nanocomposite materials. The dispersion of multi-walled carbon nanotubes (MWNTs) using trifluoroacetic acid (TFA) as a co-solvent and its subsequent use in polymer nanocomposite fabrication is reported. The use of carbon nanotube/ polymer nanocomposite system for the fabrication of organic solar cells is also studied. TFA is a strong but volatile acid which is miscible with many commonly used organic solvents. Our study demonstrates that MWNTs can be effectively purified and readily dispersed in a range of organic solvents including dimethyl formamide (DMF), tetrahydrofuran (THF), and dichloromethane when …
Comparison Of Single Stage And Two Stage Stage Grid-Tie Inverters, Keith Mansfield
Comparison Of Single Stage And Two Stage Stage Grid-Tie Inverters, Keith Mansfield
Electronic Theses and Dissertations
This thesis compares two methods of designing grid-tie inverters. The first design topology is a traditional two stage approach consisting of an isolated DC-DC converter on the input followed by a high switching frequency SPWM (Sinusoidal Pulse Width Modulation) stage to produce the required low frequency sine wave output. The novel second design approach employs a similar DC-DC input stage capable of being modulated to provide a rectified sine wave output voltage/current waveform. This stage is followed by a simple low frequency switched Unfolding Stage to recreate the required sine wave output. Both of the above designs have advantages and …
Multisensor Fusion Remote Sensing Technology For Assessing Multitemporal Responses In Ecohydrological Systems, Ammarin Makkeasorn
Multisensor Fusion Remote Sensing Technology For Assessing Multitemporal Responses In Ecohydrological Systems, Ammarin Makkeasorn
Electronic Theses and Dissertations
Earth ecosystems and environment have been changing rapidly due to the advanced technologies and developments of humans. Impacts caused by human activities and developments are difficult to acquire for evaluations due to the rapid changes. Remote sensing (RS) technology has been implemented for environmental managements. A new and promising trend in remote sensing for environment is widely used to measure and monitor the earth environment and its changes. RS allows large-scaled measurements over a large region within a very short period of time. Continuous and repeatable measurements are the very indispensable features of RS. Soil moisture is a critical element …
Low Temperature Nitife Shape Memory Alloys: Actuator Engineering And Investigation Of Deformation Mechanisms Using In Situ Neutr, Vinu Krishnan
Low Temperature Nitife Shape Memory Alloys: Actuator Engineering And Investigation Of Deformation Mechanisms Using In Situ Neutr, Vinu Krishnan
Electronic Theses and Dissertations
Shape memory alloys are incorporated as actuator elements due to their inherent ability to sense a change in temperature and actuate against external loads by undergoing a shape change as a result of a temperature-induced phase transformation. The cubic so-called austenite to the trigonal so-called R-phase transformation in NiTiFe shape memory alloys offers a practical temperature range for actuator operation at low temperatures, as it exhibits a narrow temperature-hysteresis with a desirable fatigue response. Overall, this work is an investigation of selected science and engineering aspects of low temperature NiTiFe shape memory alloys. The scientific study was performed using in …
Vacancy Engineered Doped And Undoped Nanocrystalline Rare Earth Oxide Particles For High Temperature Oxidation Resistant Coating, Ranjith Thanneeru
Vacancy Engineered Doped And Undoped Nanocrystalline Rare Earth Oxide Particles For High Temperature Oxidation Resistant Coating, Ranjith Thanneeru
Electronic Theses and Dissertations
Rare earth oxides with trivalent lattice dopants have been of great interest to researchers in the recent years due to its potential applications in catalysis and high temperature protective coatings. The ability to store oxygen in rare earths is the basis for catalysis because of the ability to change valence states which causes the presence of intrinsic oxygen vacancies in the crystal lattice. Although, several doped-rare earth oxide systems in micron scale have been investigated, the doping effect in cerium oxide nanoparticles with well characterized particle size has not been studied. The doping of ceria at that small size can …
Series Of Disintegrated Memories, Simona Balas
Series Of Disintegrated Memories, Simona Balas
Electronic Theses and Dissertations
Being absent from things or places for a period of time, we try to connect by revisiting our memories. There is always a vivid remembrance of certain objects or surroundings, but when we try to connect them, the truth in our mind deviates from the reality. The disintegration of the memories and the morphing of our imagination create a different reality in our minds that we begin to believe, considering that the truth becomes almost completely abstracted and obscured as time passes.
A Visual Sound, Bert Bogdany
A Visual Sound, Bert Bogdany
Electronic Theses and Dissertations
The repetitive nature of my work allows me to divide the tactile experience of the creative process into a contemplative state. Repetition causes the body to move automatically, less aware of its surroundings; the recurrent contact of the hand with the form causes them to merge systematically. This is the point where the sculpture for me becomes conceptually complete. It is this harmonious balance between material and the physical process that I wish to reveal to the viewer.
The Illusion Of Art: My Amalgamation Of Illustration And Contemporary Art, Victor Davila
The Illusion Of Art: My Amalgamation Of Illustration And Contemporary Art, Victor Davila
Electronic Theses and Dissertations
Drawing on archetypical aspects of human characteristics and personalities, I create images that illustrate our connection to memory, media, and culture. My work is informed by pop culture, including television, movies, cartoons and comic books as it relates to characters in our own physical world and society. The grid is used to represent both childhood games and the frames of a comic strip, where each panel equals an exact moment of time.
Double Duty: Processing And Exhibiting The Children's Home Society Of Florida Collection As An Archivist And Public Historian, April Anderson-Zorn
Double Duty: Processing And Exhibiting The Children's Home Society Of Florida Collection As An Archivist And Public Historian, April Anderson-Zorn
Electronic Theses and Dissertations
The Children's Home Society of Florida, often referred to as "Florida's Greatest Charity", is the state's oldest non profit welfare agency. Founded in 1902, the society was instrumental in creating and reforming child welfare laws as well as helping countless children in the state of Florida find loving homes. This paper focuses on the archival processing of the Children's Home Society of Florida Collection papers and the creation of a subsequent web exhibit. The role of archivist and public historian is examined to see how each profession works toward a common goal.
The Emergence Of Central Florida's Puerto Rican Community, Cynthia Melendez
The Emergence Of Central Florida's Puerto Rican Community, Cynthia Melendez
Electronic Theses and Dissertations
As with many cities in Florida, Orlando is becoming a melting pot of various ethnic groups. In particular, the Hispanic population in Orlando and throughout Central Florida is steadily increasing in numbers and influence. Groups such as Cubans, Puerto Ricans, Mexicans, and Colombians are enriching the area with their culture, language, and diversity. Puerto Ricans, the largest of the Hispanic groups in Central Florida, are also emerging as the dominant group in the region as evidenced by their common language, historical and cultural heritage, shared common interests, and in some cases, residence within clear geographical areas. Between 1980 and 1990, …
Adaptive Technomythography: The Apotheosis Of Machine And Development Of Legend In A System Of Dynamic Technology, Roger Wolf
Electronic Theses and Dissertations
Human beings will effectively deify any suitably complex system that cannot be explained through basic haptic interaction. Our culture loves technology. These days it seems we need it to feel whole. In an effort to explore the development of mythology and modular aesthetic in a technological age I have designed and constructed a number of interactive robotic 'organisms' to engage in arbitrary movement in geometric enclosures. Through observation and dialog I seek to assess the extent to which people assign human characteristics to the random and oft times aberrant mechanical behavior. To supplement this endeavor, a fictional astrological system that …
Brazilian Immigration: A New View Of Latinization, Patricia Martins Buzato
Brazilian Immigration: A New View Of Latinization, Patricia Martins Buzato
Electronic Theses and Dissertations
Immigration and ethnic issues are currently present in political discussions in the U.S. It is important to understand how immigration as a whole helps historians understand U.S. history. An issue that involves immigration debates in the South is the idea of Latinization introduced by Raymond Mohl in his article "Globalization, Latinization, and the Nuevo New South". He defines Latinization as a low-wage and low-skill labor market emphasizing Spanish speaking Latin American workers in manufacturing, construction and agriculture. He focuses primarily on Mexican-born immigrants and their influence on the labor force of Alabama's rural and urban economy. By extending this idea, …
Truths, Realities And The Easily Transmitted Image, Elizabeth Walton
Truths, Realities And The Easily Transmitted Image, Elizabeth Walton
Electronic Theses and Dissertations
By the documenting and examining things that are often overlooked in everyday life, I try to find the beauty of these objects, of people, their lives and their homes. I am interested in the current technology and the influence of the easily transmitted image. What is the truth and reality of the images shared by the current youth culture because of the use of camera phones, digital image takers, and the constant image transmissions through online social networking venues such as My Space and FaceBook? The current digital image is no longer a precious object as it was in the …
Infrared Antenna-Coupled Phased-Array, Christopher Middlebrook
Infrared Antenna-Coupled Phased-Array, Christopher Middlebrook
Electronic Theses and Dissertations
Phased-array antennas are commonplace in the radiofrequency portion of the electromagnetic spectrum. Exploitation of phasing effects between multiple antennas facilitates a wide range of applications, including synthetic-aperture radar, beam forming, and beam scanning. For the first time, the phased addition of multiple dipole antennas is demonstrated in the infrared, at a wavelength of 10.6 micrometers. Coplanar strip lines are used to interconnect the antennas, preserving the phase of the individual contributions. Several different proof-of-concept experiments are performed, using planar antennas fabricated with direct-write electron-beam lithography. Infrared-frequency currents from two dipole antennas are summed together at a common feedpoint and dissipated …
High-Speed Modelocked Semiconductor Lasers And Applications In Coherent Photonic Systems, Wangkuen Lee
High-Speed Modelocked Semiconductor Lasers And Applications In Coherent Photonic Systems, Wangkuen Lee
Electronic Theses and Dissertations
1.55-µm high-speed modelocked semiconductor lasers are theoretically and experimentally studied for various coherent photonic system applications. The modelocked semiconductor lasers (MSLs) are designed with high-speed (>5 GHz) external cavity configurations utilizing monolithic two-section curved semiconductor optical amplifiers. By exploiting the saturable absorber section of the monolithic device, passive or hybrid mode-locking techniques are used to generate short optical pulses with broadband optical frequency combs. Laser frequency stability is improved by applying the Pound-Drever-Hall (PDH) frequency stabilization technique to the MSLs. The improved laser performance after the frequency stabilization (a frequency drifting of less than 350 MHz), is extensively studied …
Kaho'olawe:A Case Study Of A Movement And The Media In Reclaiming A Hawaiian Island, Danielle Pedro
Kaho'olawe:A Case Study Of A Movement And The Media In Reclaiming A Hawaiian Island, Danielle Pedro
Electronic Theses and Dissertations
The reclaiming of land can provide for heated controversy between communities. The controversy at the outset may seem simple, but is actually quite complex involving hegemonic factors such as social, political, and economic influence. One such factor is the media. This research examines media coverage via framing in a battle between the United States Navy and the Hawaiian people to claim ownership of a Hawaiian island named Kaho'olawe. This research analyzes 519 newspaper articles from two Hawaiian newspapers--The Honolulu Star Bulletin and The Honolulu Advertiser--over a seven-year period. Six framing devices--advocate, economic, environment, Hawaiian, military, and political--are devised and implemented. …
Optical And Physical Properties Of Ceramic Crystal Laser Materials, Jed Simmons
Optical And Physical Properties Of Ceramic Crystal Laser Materials, Jed Simmons
Electronic Theses and Dissertations
Historically ceramic crystal laser material has had disadvantages compared to single crystal laser material. However, progress has been made in the last decade and a half to overcome the disadvantages associated with ceramic crystal. Today, because of the promise of ceramic crystal as a high power laser material, investigation into its properties, both physical and optical, is warranted and important. Thermal expansion was measured in this thesis for Nd:YAG (yttrium aluminum garnet) ceramic crystal using an interferometric method. The interferometer employed a spatially filtered HeNe at 633 nm wavelength. Thermal expansion coefficients measured for the ceramic crystal samples were near …
Spatiotemporal Variation Of Avian Populations Within Geographically Isolated Freshwater Marshes, Brian Rodenbeck
Spatiotemporal Variation Of Avian Populations Within Geographically Isolated Freshwater Marshes, Brian Rodenbeck
Electronic Theses and Dissertations
Metacommunity connectivity, i.e., multi-species dispersal events, is vital to metapopulation persistence in patchy landscapes. Assessments of metacommunity connectivity are not trivial. However, a relationship between trophic rank and the species-area relationship has been found in previous studies, allowing for the use of the predator species-area relationship to act as a surrogate measure of actual metacommunity connectivity of prey species in some systems. For this study, avian species were selected as they are generalist top predators within the study system. Predator species richness within geographically isolated freshwater marshes is influenced by a number of factors. I explore the relative roles of …
Russian Cultural Factors Related To Perceived Criminal Procedure Fairness: The Juxtaposition Of Policy And Practice, Olga B. Semukhina
Russian Cultural Factors Related To Perceived Criminal Procedure Fairness: The Juxtaposition Of Policy And Practice, Olga B. Semukhina
Electronic Theses and Dissertations
The purpose of this study is to investigate the relationship between the Russian culture and citizens' perceived fairness of the new Criminal Procedural Code of Russia of 2001 (CPC of 2001). The CPC of 2001 is a key policy in the Russian criminal law reform with the purpose of implementing adversarial procedure elements in Russia. The existing literature has documented the lack of public support along with observed violations of the CPC's major provisions which as made this an important area for study. It is theorized that the apparent contradiction between the underlying values of the Russian culture, and CPC's …
Effect Of Coyotes And Release Site Selection On Survival And Movement Of Translocated Swift Foxes In The Badlands Ecosystem Of South Dakota, Greg M. Schroeder
Effect Of Coyotes And Release Site Selection On Survival And Movement Of Translocated Swift Foxes In The Badlands Ecosystem Of South Dakota, Greg M. Schroeder
Electronic Theses and Dissertations
Success of different release strategies for swift fox (Vulpes velox) translocation was evaluated in the Badlands Ecosystem in southwestern South Dakota. Release site selection (outside coyote [Canis latrans] core-use areas compared to random release sites) and release method (i.e., hard, semi-hard, and soft) were examined to determine effects on swift fox survival and movements at 50 days post-release. I hypothesized that swift foxes released outside of coyote core-use areas would survive at a higher rate than foxes released at random sites. From 2003-2006, 16 adult coyotes were fitted with Global Positioning System (GPS) radio collars and monitored during the pup …
Another Look At Gender In Prime-Time Television, Jan Carolyn Kircher
Another Look At Gender In Prime-Time Television, Jan Carolyn Kircher
Electronic Theses and Dissertations
Television has become an important agent of socialization in society today. Social interaction on prime-time television was examined 24 years ago by members of the Sociology Department at South Dakota State University. That study was similar to this research project that investigates gender roles on prime-time television. The earlier study used a modified version of the Bales Interaction Scale to code male and female behavior to assess the extent to which prime-time television presented traditional or nontraditional gender roles. This study used research methods similar to those of the previous study to see if traditional gender roles depicted on prime-time …
Status, Distribution, And Density Of White-Tailed Jackrabbits And Black-Tailed Jackrabbits In South Dakota, Dustin J. Schaible
Status, Distribution, And Density Of White-Tailed Jackrabbits And Black-Tailed Jackrabbits In South Dakota, Dustin J. Schaible
Electronic Theses and Dissertations
The status of jackrabbit (Lepus spp.) populations throughout the Northern Great Plains has been a cause for concern by wildlife managers in recent years and there has been a paucity of information about the ecology of the white-tailed jackrabbit (Lepus townsendii) and the black-tailed jackrabbit (Lepus californicus) in South Dakota. Since there have been little monitoring efforts for hares, 21 permanent spotlight line transects were established across South Dakota for future surveying efforts. These transects were surveyed to obtain baseline information about jackrabbit density and distribution throughout the state. Jackrabbit density was highest in the northwestern portions of the state …
Human Development Ranking: Predictors And Implications For Haiti, Jean Michel Basquin
Human Development Ranking: Predictors And Implications For Haiti, Jean Michel Basquin
Electronic Theses and Dissertations
This study is an effort to identify some of the predictors of human development index ranking and their implications in the case of Haiti. Secondary quantitative data from a variety of sources were used and complemented with qualitative data collected from Haiti using a key informant interview guide. Because of the unavailability of the secondary data and the nature of the some of the variables, three groups of countries were studied. One group contained 64 countries, another 96, and 121 countries. The Human Development Index (HDI) of the United Nations Development Programs (UNDP) was treated as the dependent variable. Eight …
Perceptual Differences In The Conversational Performance Of People With Severe Expressive Aphasia Using Three Types Of Visual Screen Displays On Speech Generating Devices, Laura Figley
Electronic Theses and Dissertations
A multiple single-subject randomized design experimental study measured the perceptions of three persons with aphasia and their communication partners without aphasia when communicating across three conditions: Condition A--speech generating device (SGD) with No Display; Condition B--SGD with visual scene display (VSD); and Condition C--SGD with traditional grid display (TGD). Quantitative data were collected in the forms of preference choice of display type, a forced-choice ranking of experimental sessions, and 7-pt Likert rating scales. All participants rated the dependent variables of communicative success, ease, independence, and naturalness across conditions. Qualitative data were collected in the form of open-ended interviews conducted at …