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Articles 24241 - 24270 of 24274
Full-Text Articles in Entire DC Network
Principal Leadership, Janet A. Cornella
Principal Leadership, Janet A. Cornella
Electronic Theses and Dissertations 2010 - 2019
The purpose of this research study was to identify practices that principals utilize that are believed to influence teacher retention. Teacher turnover is a major problem facing principals and school systems today. Much of the present research focuses on why teachers leave the field, but there is little research on the principals' perceptions of what they do to stem the flow of educators leaving the classroom. To accomplish this purpose, a case study was conducted, focused on identifying the principals' role in teacher retention and their perceptions of the most important strategies utilized to stimulate high teacher retention. Qualitative research …
Remote Gaming On Resource Constrained Devices, Waazim. Reza
Remote Gaming On Resource Constrained Devices, Waazim. Reza
Electronic Theses and Dissertations 2010 - 2019
Games have become important applications on mobile devices. A mobile gaming approach known as remote gaming is being developed to support games on low cost mobile devices. In the remote gaming approach, the responsibility of rendering a game and advancing the game play is put on remote servers instead of the resource constrained mobile devices. The games rendered on the servers are encoded as video and streamed to mobile devices. Mobile devices gather user input and stream the commands back to the servers to advance game play. With this solution, mobile devices with video playback and network connectivity can become …
Residential Lawn Water Use And Lawn Irrigation Practices, Felicia D. Survis
Residential Lawn Water Use And Lawn Irrigation Practices, Felicia D. Survis
Electronic Theses and Dissertations 2010 - 2019
Water conservation initiatives seldom quantify the volume of water that is at stake in lawn watering. In many communities, including those in South Florida, outdoor water use, which includes lawn irrigation, is not metered separately from indoor water use and is indistinguishable from indoor water usage. A large number of residents use self supply non-potable wells for lawn irrigation that are not regulated by the South Florida Water Management District. The result is that residential lawn water use is difficult to account for and quantify. This thesis project addressed these difficulties by combining semistructured interviews, daily watering observations and irrigation …
Robust Auv Docking Guidance And Navigation Approach To Handling Unknown Current Disturbances, Hoe Eng Teo
Robust Auv Docking Guidance And Navigation Approach To Handling Unknown Current Disturbances, Hoe Eng Teo
Electronic Theses and Dissertations 2010 - 2019
The main contribution in this thesis is the design of a robust AUV docking guidance and navigation approach that can guide and home an AUV towards an acoustic source located on an oriented bottom-mounted underwater docking station, under presence of unknown current disturbances and in the absence of any form of onboard velocity sensor. A Complementary Filter and various forms of Kalman Filters were separately formulated to estimate the current and vehicle positions with strategic vehicle manoeuvres. A current compensator uses the estimated current to maintain the desired vehicle course while under current disturbance. Tagaki-Sugeno-Kang Fuzzy Inference System was designed …
Sensitivity Analysis Of Blind Separation Of Speech Mixtures, Savaskan. Bulek
Sensitivity Analysis Of Blind Separation Of Speech Mixtures, Savaskan. Bulek
Electronic Theses and Dissertations 2010 - 2019
Blind source separation (BSS) refers to a class of methods by which multiple sensor signals are combined with the aim of estimating the original source signals. Independent component analysis (ICA) is one such method that effectively resolves static linear combinations of independent non-Gaussian distributions. We propose a method that can track variations in the mixing system by seeking a compromise between adaptive and block methods by using mini-batches. The resulting permutation indeterminacy is resolved based on the correlation continuity principle. Methods employing higher order cumulants in the separation criterion are susceptible to outliers in the finite sample case. We propose …
Signature System For Video Identification, Sebastian Possos Medellin
Signature System For Video Identification, Sebastian Possos Medellin
Electronic Theses and Dissertations 2010 - 2019
Video signature techniques based on tomography images address the problem of video identification. This method relies on temporal segmentation and sampling strategies to build and determine the unique elements that will form the signature. In this thesis an extension for these methods is presented; first a new feature extraction method, derived from the previously proposed sampling pattern, is implemented and tested, resulting in a highly distinctive set of signature elements, second a robust temporal video segmentation system is used to replace the original method applied to determine shot changes more accurately. Under a very exhaustive set of tests the system …
Simulation And Modeling Of Flow Field Around A Horizontal Axis Wind Turbine (Hawt) Using Rans Method, Armen. Sargsyan
Simulation And Modeling Of Flow Field Around A Horizontal Axis Wind Turbine (Hawt) Using Rans Method, Armen. Sargsyan
Electronic Theses and Dissertations 2010 - 2019
The principal objective of the proposed CFD analysis is to investigate the flow field around a horizontal axis wind turbine rotor and calculate the turbine's power. A full three dimensional computational fluid dynamics method based on Reynolds Averaged Navier Stokes approach was used in this study. The wind turbine has three blades and a rotor diameter of six meters. One third of the wind turbine rotor was modeled by means of 120o periodicity in a moving reference frame system. The power coefficient curve obtained from the CFD results is compared with experimental data obtained by NREL Phase VI rotor experiment. …
Smart Low Power Obstacle Avoidance Device, Ernesto. Cividanes
Smart Low Power Obstacle Avoidance Device, Ernesto. Cividanes
Electronic Theses and Dissertations 2010 - 2019
Several technologies are being made available for the blind and the visually impaired with the use of infrared and sonar sensors, Radio Frequency Identification, GPS, Wi-Fi among others. Current technologies utilizing microprocessors increase the device's power consumption. In this project, a Verilog Hardware Language (VHDL) designed handheld device that autonomously guides a visually impaired user through an obstacle free path is proposed. The goal is to minimize power consumption by not using the usual microcontroller and replacing it with components that can increase its speed. Utilizing six infrared sensors, the handheld device is modeled after current technologies which use IR …
Solar Cell Degradation Under Ionizing Radiation Ambient, Pallil George A Thengum
Solar Cell Degradation Under Ionizing Radiation Ambient, Pallil George A Thengum
Electronic Theses and Dissertations 2010 - 2019
The efforts addressed in this thesis refer to assaying the degradations in modern solar cells used in space-borne and/or nuclear environment applications. This study is motivated to address the following: 1. Modeling degradations in Si pn-junction solar cells (devices-under-test or DUTs) under different ionizing radiation dosages 2. Preemptive and predictive testing to determine the aforesaid degradations that decide eventual reliability of the DUTs; and 3. Using electrical overstressing (EOS) to emulate the fluence of ionizing radiation dosage on the DUT. Relevant analytical methods, computational efforts and experimental studies are described. Forward/reverse characteristics as well as ac impedance performance of a …
Standards-Based Content Analysis Of Selected Biological Science Websites, Joy E. Stewart
Standards-Based Content Analysis Of Selected Biological Science Websites, Joy E. Stewart
Electronic Theses and Dissertations 2010 - 2019
The purpose of this study was to analyze the biology content, instructional strategies, and assessment methods of 100 biological science websites that were appropriate for Grade 12 educational purposes. For the analysis of each website, an instrument, developed from the National Science Education Standards (NSES) for Grade 12 Life Science coupled with criteria derived from the Web-based Inquiry (WBI) for Learning Science instrument (Bodzin, 2005) and other pertinent published educational literature, was utilized. The analysis focused on elucidating the appropriateness of the biology content, instructional strategies, and assessment tools of selected websites for facilitating the biological science education of Grade …
Stiffness Characterization And Life Cycle Analysis Of Reinforced Asphalt Pavements Using Falling Weight Deflectometer Tests, Alex. Lima-Arie
Stiffness Characterization And Life Cycle Analysis Of Reinforced Asphalt Pavements Using Falling Weight Deflectometer Tests, Alex. Lima-Arie
Electronic Theses and Dissertations 2010 - 2019
The western and northern parts of South Florida have shallow layers of organic and plastic soils under existing roads. These roads often exhibit large amount of cracking and distortion in a short period of time. Traditional repairs are often not practical due to high costs and extended construction time. In an effort to develop rehabilitation strategies that could be strictly applied to the surface layer, a pilot test site was selected along the alignment of SR 15/US 98 in northwest Palm Beach County, where severe pavement distresses were observed due to the presence of thick organic layers. PaveTrac MT-1, GlasGrid …
Stress Distribution Around A Transverse Circular Opening Through The Midspan Of A Double Reinforced Beam, Heather R. Anesta
Stress Distribution Around A Transverse Circular Opening Through The Midspan Of A Double Reinforced Beam, Heather R. Anesta
Electronic Theses and Dissertations 2010 - 2019
This manuscript predicts the behavior of a doubly reinforced concrete beam with a circular opening at its midspan by closely analyzing traditional beam theory and design. It then confirms these predictions with finite element modeling software while providing design suggestions. The analysis is limited to the tensile and compressive stresses and cracking behavior. The objectives are to determine the stress distribution around a circular opening that agrees with conventional beam theory. The beam behavior is examined from zero load to failure load. ANSYS is utilized in lieu of real world testing, and the appendix includes the finite element results for …
Study Of Seventh Grade Geometry Posttest Scores After Using The Geoleg Manipulative Tool, Phyllis. Pacilli
Study Of Seventh Grade Geometry Posttest Scores After Using The Geoleg Manipulative Tool, Phyllis. Pacilli
Electronic Theses and Dissertations 2010 - 2019
The purpose of this research was to identify if 1) there is a difference in student achievement between students who use the GeoLeg manipulative tool and students who use a traditional compass, protractor, and ruler on the same geometry unit; 2) there is a difference in student achievement between the genders between those who use the GeoLeg manipulative tool and those students who do not; and 3) there is a relationship between identified learning styles and student achievement on a geometry unit posttest after using the GeoLeg manipulative tool. There were 317 students in the study. The research found that …
Task Allocation And Path Planning For Acoustic Networks Of Auvs, Yueyue Deng
Task Allocation And Path Planning For Acoustic Networks Of Auvs, Yueyue Deng
Electronic Theses and Dissertations 2010 - 2019
Controlling the cooperative behaviors of a fleet of autonomous underwater vehicles in a stochastic, complex environment is a formidable challenge in artificial intelligence. The complexity arises from the challenges of limited navigation and communication capabilities of underwater environment. A time critical cooperative operation by acoustic networks of Multiple Cooperative Vehicles (MCVs) necessitates a robust task allocation mechanism and an efficient path planning model. In this work, we present solutions to investigate two aspects of the cooperative schema for multiple underwater vehicles under realistic underwater acoustic communications: a Location-aided Task Allocation Framework (LAAF) algorithm for multi-target task assignment and a mathematical …
Technoeconomic Aspects Of Next-Generation Telecommunications Including The Internet Service, Sardenberg Renata Cristina Tourinho
Technoeconomic Aspects Of Next-Generation Telecommunications Including The Internet Service, Sardenberg Renata Cristina Tourinho
Electronic Theses and Dissertations 2010 - 2019
This research is concerned with the technoeconomic aspects of modern and next-generation telecommunications including the Internet service. The goal of this study thereof is tailored to address the following: (i) Reviewing the technoeconomic considerations prevailing in telecommunication (telco) systems and their implicating futures; (ii) studying relevant considerations by depicting the modern/next-generation telecommunications as a digital ecosystem viewed in terms of underlying complex system evolution (akin to biological systems); (iii) pursuant to the digital ecosystem concept, co-evolution modeling of competitive business structures in the technoeconomics of telco services using dichotomous (flip-flop) states as seen in prey-predator evolution; (iv) specific to Internet …
Test Platform Development For Measuring Surface Effect Ship Response To Wave Loads, Nicholas Kouvaras
Test Platform Development For Measuring Surface Effect Ship Response To Wave Loads, Nicholas Kouvaras
Electronic Theses and Dissertations 2010 - 2019
The goal of this thesis is to develop a test platform for measuring surface effect ship (SES) response to wave loads. The platform is designed and built incorporating a self-propelled vehicle with data acquisition and navigation capabilities. Theoretical analysis is performed, various hardware and electronic parts are designed and built and software applications developed. Wave tank experiments are conducted for test platform evaluation and determination of vehicle response to a range of wave conditions. Furthermore, a three-dimensional model of the AIRCAT scale model SES is created. The theoretical analysis shows that the scale effects in some cases are great, so …
The Effects Of Social Structure On Individual Actions: A Social Cognition And Social Structure Approach, Harry Trip Knoche
The Effects Of Social Structure On Individual Actions: A Social Cognition And Social Structure Approach, Harry Trip Knoche
Electronic Theses and Dissertations 2010 - 2019
This study examines the effects of epistemic motives and individual social structure (strength of social ties) on individual actions. lt has been suggested that the informal structure of relations that develops within firms affects the actions of individuals e effects of both epistemic motives and social structure are considered. The findings of this study suggest that information about the epistemic motives of employees can provide insight into the fonnation of the individual social structures and the intrinsic desire of employees to take interdependent or independent actions. The effects of epistemic motives and individual social structure on individual actions, the organizing …
Transit Signal Priority For Emergency Evacuation, Scott A. Parr
Transit Signal Priority For Emergency Evacuation, Scott A. Parr
Electronic Theses and Dissertations 2010 - 2019
The goal of this research is to answer a single question. During an urban evacuation, is it advisable for regional planners to allow transit units signal priority in cases where police assisted traffic controls are not an option? Standard practice for emergency evacuation is to place police officers at intersection throughout the evacuation area. However, this is not always an option where environmental factors such as the presence of fire, chemical plume, radioactive fallout (nuclear contaminated wind and dust) do not permit police presence. Results from a case study conducted on Washington D.C. show that it would take four non-prioritized …
Use Of Hybrid Rice Husk Ash-Fly Ash Mixtures As Sustainable Supplementary Materials For Concrete In The Marine Environment, Diana. Arboleda
Use Of Hybrid Rice Husk Ash-Fly Ash Mixtures As Sustainable Supplementary Materials For Concrete In The Marine Environment, Diana. Arboleda
Electronic Theses and Dissertations 2010 - 2019
This paper presents the comparison of shrinkage and corrosion characteristics of optimized hybrid Rice Husk Ash (RHA)/Fly Ash (FA)-modified Concrete, with those of normal concrete in the marine environment. Uses of both FA and RHA have numerous environmental benefits. Shrinkage performance was determined by subjecting the mixes to restrained shrinkage testing per ASTM C1581. The time to cracking of the specimens improved an average of 18% with the hybrid mixes. Corrosion testing of reinforced columns was performed in a simulated tidal cycle Marine Environment. Corrosion potential improved by as much as 35% for the mix with the highest FA/RHA replacement, …
Visualization Tool For Molecular Dynamics Simulation, Meha. Garg
Visualization Tool For Molecular Dynamics Simulation, Meha. Garg
Electronic Theses and Dissertations 2010 - 2019
A study of Molecular Dynamics using computational methods and modeling provides the understanding on the interaction of the atoms, properties, structure, and motion and model phenomenon. There are numerous commercial tools available for simulation, analysis and visualization. However any particular tool does not provide all the functionalities. The main objective of this work is the development of the visualization tool customized for our research needs to view the three dimensional orientation of the atom, process the simulation results offline, able to handle large volume of data, ability to display complete frame, atomic trails, and runtime response to the researchers' query …
Revitalizing Union Democracy: Labor Law, Bureaucracy, And Workplace Association, Matthew Dimick
Revitalizing Union Democracy: Labor Law, Bureaucracy, And Workplace Association, Matthew Dimick
Journal Articles
Do core doctrines of labor-relations law obstruct the internal democratic governance of labor unions in the United States? Union democracy is likely an essential precondition for the broader strategic and organizational changes unions must undertake in order to recruit new union members — the labor movement’s cardinal priority. Yet according to widely accepted wisdom, the weakness of democracy within labor unions is the unavoidable outcome of an “iron law of oligarchy” that operates in all such membership-based organizations. This Article challenges this conventional thinking and argues that the triumph of oligarchy over democracy in US labor unions is not inevitable, …
The Map Of Medicine: Its Current And Potential Impacts In Service Redesign, In Clinical Practice And In Medical Education., Nicola Brennan, Karen Mattick
The Map Of Medicine: Its Current And Potential Impacts In Service Redesign, In Clinical Practice And In Medical Education., Nicola Brennan, Karen Mattick
Peninsula Medical School
EXECUTIVE SUMMARYThis report presents the findings of the Map of Medicine study undertaken by the Institute of Clinical Education, Peninsula Medical School in collaboration with the South West Strategic Health Authority. The study had 3 objectives:Objective 1: to provide a systematic review of the national status of the Map of Medicine to determine the extent of the evidence for its impact on clinical practice. This identified a paucity of evidence in the published literature and a variable quality of the evidence that does exist. Despite this, there are some encouraging early indications for the use of the Map of Medicine …
Plausible Methods For Populating Virtual Scenes, Catherine Ennis, Anton Gerdelan, Carol O'Sullivan
Plausible Methods For Populating Virtual Scenes, Catherine Ennis, Anton Gerdelan, Carol O'Sullivan
Research Outputs: 2025-Present
No abstract provided.
Unmanned Aircraft Systems Sense And Avionics Utilizing Ads-B Transceiver, Florent Martel
Unmanned Aircraft Systems Sense And Avionics Utilizing Ads-B Transceiver, Florent Martel
Theses and Dissertations
No abstract provided.
Comparison Of The Fpga And Dsp Based Modulation Techniques In Controlling Dc-Dc Converters, Prashant Agnihotri
Comparison Of The Fpga And Dsp Based Modulation Techniques In Controlling Dc-Dc Converters, Prashant Agnihotri
Theses and Dissertations
No abstract provided.
Geographic Distribution Of Natural And Anthropogenic Noise In Selected Grand Forks Parks, Erin A. Pederson
Geographic Distribution Of Natural And Anthropogenic Noise In Selected Grand Forks Parks, Erin A. Pederson
Theses and Dissertations
No abstract provided.
Events With An Isolated Lepton And Missing Transverse Momentum And Measurement Of W Production At Hera, F. D. Aaron, H. Abramowicz, I. Abt, L. Adamczyk, M. Adamus, M. Aldaya Martin, C. Alexa, V. Andreev, S. Antonelli, P. Antonioli, A. Antonov, B. Antunovic, M. Arneodo, V. Aushev, O. Bachynska, S. Backovic, A. Baghdasaryan, A. Bamberger, A. N. Barakbaev, G. Barbagli, G. Bari, F. Barreiro, E. Barrelet, W. Bartel, D. Bartsch, M. Basile, K. Begzsuren, O. Behnke, J. Behr, U. Behrens, L. Bellagamba, Margarita C. K. Mattingly
Events With An Isolated Lepton And Missing Transverse Momentum And Measurement Of W Production At Hera, F. D. Aaron, H. Abramowicz, I. Abt, L. Adamczyk, M. Adamus, M. Aldaya Martin, C. Alexa, V. Andreev, S. Antonelli, P. Antonioli, A. Antonov, B. Antunovic, M. Arneodo, V. Aushev, O. Bachynska, S. Backovic, A. Baghdasaryan, A. Bamberger, A. N. Barakbaev, G. Barbagli, G. Bari, F. Barreiro, E. Barrelet, W. Bartel, D. Bartsch, M. Basile, K. Begzsuren, O. Behnke, J. Behr, U. Behrens, L. Bellagamba, Margarita C. K. Mattingly
Faculty Publications
A search for events containing an isolated electron or muon and missing transverse momentum produced in e±p collisions is performed with the H1 and ZEUS detectors at HERA. The data were taken in the period 1994-2007 and correspond to an integrated luminosity of 0.98 fb-1. The observed event yields are in good overall agreement with the Standard Model prediction, which is dominated by single W production. In the e+p data, at large hadronic transverse momentum PTX < 25GeV, a total of 23 events are observed compared to a prediction of 14.0 ±1.9. The total single W boson production cross section is measured as 1.06 ± 0.16 (stat.) ± 0.07 (sys.) pb, in agreement with an Standard Model (SM) expectation of 1.26 ± 0.19 pb.
Measurement Of J/Ψ Photoproduction At Large Momentum Transfer At Hera, S. Chekanov, M. Derrick, S. Magill, B. Musgrave, D. Nicholass, J. Repond, R. Yoshida, P. Antonioli, G. Bari, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, F. Cindolo, M. Corradi, G. Iacobucci, A. Margotti, R. Nania, A. Polini, S. Antonelli, M. Basile, M. Bindi, L. Cifarelli, A. Contin, S. De Pasquale, G. Sartorelli, A. Zichichi, D. Bartsch, I. Brock, H. Hartmann, E. Hilger, Margarita C. K. Mattingly
Measurement Of J/Ψ Photoproduction At Large Momentum Transfer At Hera, S. Chekanov, M. Derrick, S. Magill, B. Musgrave, D. Nicholass, J. Repond, R. Yoshida, P. Antonioli, G. Bari, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, F. Cindolo, M. Corradi, G. Iacobucci, A. Margotti, R. Nania, A. Polini, S. Antonelli, M. Basile, M. Bindi, L. Cifarelli, A. Contin, S. De Pasquale, G. Sartorelli, A. Zichichi, D. Bartsch, I. Brock, H. Hartmann, E. Hilger, Margarita C. K. Mattingly
Faculty Publications
The proton-dissociative diffractive photoproduction of J/ψ mesons has been studied in ep collisions with the ZEUS detector at HERA using an integrated luminosity of 112 pb-1. The cross section is presented as a function of the photon-proton centre-ofmass energy and of the squared four-momentum transfer at the proton vertex. The results are compared to perturbative QCD calculations.
Integration Of Geospatial Technologies Into K-12 Curriculum, Donna L. Goldstein
Integration Of Geospatial Technologies Into K-12 Curriculum, Donna L. Goldstein
Electronic Theses and Dissertations 2010 - 2019
The purpose of this study was to explore outcomes of a GIS/GPS integration process: to (a) examine student responses to GIS and GPS inclusion in their curriculum, (b) determine whether a relationship exists between inclusion of GIS into existing K-12 curriculum and student achievement, (c) examine the effectiveness of GIS professional development for teachers, and (d) evaluate teacher perceptions of the value of integrating GIS into their existing curricula. This study was quantitative and quasi-experimental in design. The samples consisted of 1,425 students from one middle school and 62 teachers from Palm Beach County School District. Two instruments were used …
Modern Seawater Acidification: The Response Of Foraminifera To High-Co2 Conditions In The Mediterranean Sea, B. B. Dias, M. B. Hart, C. W. Smart, J. M. Hall-Spencer
Modern Seawater Acidification: The Response Of Foraminifera To High-Co2 Conditions In The Mediterranean Sea, B. B. Dias, M. B. Hart, C. W. Smart, J. M. Hall-Spencer
School of Geography, Earth and Environmental Sciences
No abstract provided.