Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2012

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 28531 - 28560 of 28593

Full-Text Articles in Entire DC Network

Oranges And Inlets, Nathaniel Osborn Jan 2012

Oranges And Inlets, Nathaniel Osborn

Electronic Theses and Dissertations 2010 - 2019

Nineteenth century settlers in Florida's Indian River Lagoon (IRL) region created an isolated fringe culture wholly dependent on the instable hydrological forces of the shallow lagoon system. These settlers were among the first to construct a built environment market by the dredging and filling that would define much of the twentieth century Sunshine State. There has been no period when the liminal IRL ecosystem was not without shifting barrier islands and dramatically varying salinity levels due primarily to the oceanic interchange following the opening and closing of natural inlets. This paper suggests that attempts to "restore" the lagoon will necessarily …

Go to article

Noise Radiation From Small Steps And Cubic Roughness Elements In Turbulent Boundary Layer Flow, Benjamin Skyler Bryan Jan 2012

Noise Radiation From Small Steps And Cubic Roughness Elements In Turbulent Boundary Layer Flow, Benjamin Skyler Bryan

Electronic Theses and Dissertations 2010 - 2019

Ji and Wang (2010) propose that the dominant source of sound from a forward facing step is the stream wise dipole on the face of the step and that sources acting normal to the flow are negligible. Sound radiation normal to flow of forward facing steps has been measured in wind tunnel experiments previously by Farabee and Casarella (1986, 1991) and Catlett (2010). A method for evaluating sound radiation from surface roughness proposed in Glegg and Devenport (2009) has been adapted and applied to flow over a forward facing step which addresses the sound normal to the flow that was …

Go to article

Campus Driver Assistant On An Android Platform, Iana. Zankina Jan 2012

Campus Driver Assistant On An Android Platform, Iana. Zankina

Electronic Theses and Dissertations 2010 - 2019

College campuses can be large, confusing, and intimidating for new students and visitors. Finding the campus may be easy using a GPS unit or Google Maps directions, but this is not the case when you are actually on the campus. There is no service that provides directional assistance for the campus itself. This thesis proposes a driver assistant application running on an Android platform that can direct drivers to different buildings and parking lots in the campus. The application's user interface lets the user select a user type, a campus, and a destination through use of drop down menus and …

Go to article

Canadian Professional Chef's' Perceived Value Of Formal Culinary Education And Its Relationship With Industry Success, Colin Philip Roche Jan 2012

Canadian Professional Chef's' Perceived Value Of Formal Culinary Education And Its Relationship With Industry Success, Colin Philip Roche

Electronic Theses and Dissertations 2010 - 2019

Hundreds of universities, colleges and institutions graduate students yearly with some form of culinary education. To date, limited research has been conducted to examine the perceived value of formal culinary education on industry career success from the perspective of those who conduct the majority of the hiring of culinary positions. This dissertation examined the perceived value of formal education in culinary arts and its relationship with industry success from the perspective of Canadian professional chefs.... Though the population for this study was Canadian professional chefs who were members of the Canadian Culinary Federation, the results of this study may be …

Go to article

Characterizing Magnetic Noise Of Auv For Use In Towed Magnetometer Study Of Internal Waves, Dylan. Tilley Jan 2012

Characterizing Magnetic Noise Of Auv For Use In Towed Magnetometer Study Of Internal Waves, Dylan. Tilley

Electronic Theses and Dissertations 2010 - 2019

As part of a project to study internal waves, FAU plans to utilize an AUV to tow a magnetometer to study electromagnetic signatures from internal waves. This research is focused on the electromagnetic noise issues related to using an AUV to tow the magnetic sensor package. There are active sources of electromagnetic noise caused by an AUV that are present in addition to those induced by the Earth's magnetic field and permanent magnets. To characterize the magnetic noise associated with the AUV magnetometer tow system, the various active source elements were identified, the orientation sensitivity of the sensors being used …

Go to article

Comparing Salinity Models In Whitewater Bay Using Remote Sensing, Donna Selch Jan 2012

Comparing Salinity Models In Whitewater Bay Using Remote Sensing, Donna Selch

Electronic Theses and Dissertations 2010 - 2019

This study compared models that used remote sensing to assess salinity in Whitewater Bay. The quantitative techniques in this research allow for a less costly and quicker assessment of salinity values. Field observations and Landsat 5 TM imagery from 2003-2006 were separated into wet and dry seasons and temporally matched. Interpolation models of Inverse Distance Weighting and Kriging were compared to empirical regression models (Ordinary Least Squares and Geographically Weighted Regression - GWR) via their Root Mean Square Error. The results showed that salinity analysis is more accurate in the dry season compared with the wet season. Univariate and multivariate …

Go to article

Concrete Diffusivity And Its Correlation With Chloride Deposition Rate On Concrete Exposed To Marine Environments, Victor Anthony Echevarria Jan 2012

Concrete Diffusivity And Its Correlation With Chloride Deposition Rate On Concrete Exposed To Marine Environments, Victor Anthony Echevarria

Electronic Theses and Dissertations 2010 - 2019

The aim of this study was to investigate the diffusion of chloride ions into concrete samples that were exposed in scenarios that simulate the splash, tidal, atmospheric, and immersed portions of a marine structure. To study the atmospheric deposition, the project also investigated the relationship between chloride ion deposition on the wet candle and its accumulation into concrete samples. Results from the wet candle experiment indicated that between 2% and 45% of the chlorides deposited per square meter of exposed area could be found within the concrete samples. After 6 months, slag G1a blocks showed the most resistance to chloride …

Go to article

Contributions Of A Holocaust And Human Rights Education Program To Teacher Learning, Rachayita Shah Jan 2012

Contributions Of A Holocaust And Human Rights Education Program To Teacher Learning, Rachayita Shah

Electronic Theses and Dissertations 2010 - 2019

Drawing on the principles of critical multicultural education and teacher learning, this mixed methods study examined the contributions of a professional development program (the Holocaust and Human Rights Education Program - HEP) to teacher's knowledge, attitudes, and practices, and the role of contextual factors such as school support, HEP support, years of teaching experience, and grade levels in mediating teachers' practices concerning Holocaust and human rights education...The findings revealed that from the participants' perspectives, the HEP contributed to their content knowledge, pedagogical knowledge, attitudes, and classroom practices. ... Participants also reported learning about age appropriate curriculum resources and about useful …

Go to article

Cultivating Supportive, Professional Relationships Among Black Women In Educational Leadership, Dildra. Martin-Ogburn Jan 2012

Cultivating Supportive, Professional Relationships Among Black Women In Educational Leadership, Dildra. Martin-Ogburn

Electronic Theses and Dissertations 2010 - 2019

Although current employment statistics paint a promising picture for women in general, they fail to address both the multitude of challenges women face in their attempt to secure leadership positions or in their ability to gain and maintain support from their female colleagues. Black women, in particular, tend to be torn between their fabled image to others in the organization and their official duties and responsibilities at work. This paper discusses definitions and conceptual uses of horizontal and vertical violence by Black female educational leaders ; problematizes the phenomenon as outlined by Freire (1970) at the theoretical level ; outlines …

Go to article

Cultural Perspectives Among Children Of Guatemalan Maya Immigrants In Lake Worth, Florida, Tara. Sprague Jan 2012

Cultural Perspectives Among Children Of Guatemalan Maya Immigrants In Lake Worth, Florida, Tara. Sprague

Electronic Theses and Dissertations 2010 - 2019

Every day children of Guatemalan Maya immigrants balance two cultures. They reside in The United States and attend American schools but are being raised by their Guatemalan Maya parents. They continually navigate between the two and are faced with challenges daily. Since these children are influenced by two cultures, my interest was primarily on the cultural perspectives of these children, more specifically: what effects does the new culture have on the old? Through volunteering at a Guatemalan Maya after-school program, interviewing and administering the Children's Apperception Test, results showed these children to be influenced by American culture. The biggest indicator, …

Go to article

Cytogenic Bioinformatics Of Chromosomal Aberrations And Genetic Disorders, Jagadeshwari. Karri Jan 2012

Cytogenic Bioinformatics Of Chromosomal Aberrations And Genetic Disorders, Jagadeshwari. Karri

Electronic Theses and Dissertations 2010 - 2019

Cytogenetics is a study on the genetic considerations associated with structural and functional aspects of the cells with reference to chromosomal inclusions. Chromosomes are structures within the cells containing body's information in the form of strings of DNA. When atypical version or structural abnormality in one or more chromosomes prevails, it is defined as chromosomal aberrations (CA) depicting certain genetic pathogeny (known as genetic disorders). The present study assumes the presence of normal and abnormal chromosomal sets in varying proportions in the cytogenetic complex ; and, stochastical mixture theory is invoked to ascertain the information redundancy as a function of …

Go to article

Data Gateway For Prognostic Health Monitoring Of Ocean-Based Power Generation, Joseph. Gundel Jan 2012

Data Gateway For Prognostic Health Monitoring Of Ocean-Based Power Generation, Joseph. Gundel

Electronic Theses and Dissertations 2010 - 2019

On August 5, 2010 the U.S. Department of Energy (DOE) has designated the Center for Ocean Energy Technology (COET) at Florida Atlantic University (FAU) as a national center for ocean energy research and development. Their focus is the research and development of open-ocean current systems and associated infrastructure needed to development and testing prototypes. The generation of power is achieved by using a specialized electric generator with a rotor called a turbine. As with all machines, the turbines will need maintenance and replacement as they near the end of their lifecycle. This prognostic health monitoring (PHM) requires data to be …

Go to article

Design And Analysis Of An Ocean Current Turbine Performance Assessment System, Matthew T. Young Jan 2012

Design And Analysis Of An Ocean Current Turbine Performance Assessment System, Matthew T. Young

Electronic Theses and Dissertations 2010 - 2019

This thesis proposes a sensor approach for quantifying the hydrodynamic performance of Ocean Current Turbines (OCT), and investigates the influence of sensor-specific noise and sampling rates on calculated turbine performance. Numerical models of the selected sensors are developed, and then utilized to add stochastic measurement error to numerically-generated, non-stochastic OCT data. Numerically-generated current velocity and turbine performance measurements are used to quantify the relative influence of sensor-specific error and sampling limitations on sensor measurements and calculated OCT performance results. The study shows that the addition of sensor error alters the variance and mean of OCT performance metric data by roughly …

Go to article

Design Of Hydrodynamic Test Facility And Scaling Procedure For Ocean Current Renewable Energy Devices, William. Valentine Jan 2012

Design Of Hydrodynamic Test Facility And Scaling Procedure For Ocean Current Renewable Energy Devices, William. Valentine

Electronic Theses and Dissertations 2010 - 2019

Simulations have been carried out to validate a hydrokinetic energy system non-dimensional scaling procedure. The requirements for a testing facility intended to test such devices will be determined from the results of the simulations. There are 6 simulations containing 3 prototype systems and 2 possible model facility depths to give a range of results. The first 4 tests are conducted using a varying current profile, while the last 2 tests use a constant current profile of 1.6 m/s. The 3 prototype systems include a: 6 m spherical buoy, a 12 m spherical buoy and a turbine component system. The mooring …

Go to article

Detecting Essential Genes In Microarray Dataset With Unequal Number Of Gene Probes, Wei Zhang Jan 2012

Detecting Essential Genes In Microarray Dataset With Unequal Number Of Gene Probes, Wei Zhang

Electronic Theses and Dissertations 2010 - 2019

Microarray technology is a powerful approach for genomic research, which allows the monitoring of expressing profiles for tens of thousands genes in parallel and is already producing huge amounts of data. This thesis is motivated by a special microarray dataset for the bacteria Yersinia Pestis. It contains more than four thousands genes and each gene has different number of observations. The main purpose of this thesis is to detect essentially functional genes. Gene level adjusted multiple t‐test is proposed to handle the problem of unequal number of observations. Furthermore, a comparation study of our method with two other existing methods …

Go to article

Detection, Localization, And Identification Of Bearings With Raceway Defect For A Dynamometer Using High Frequency Modal Analysis Of Vibration Across An Array Of Accelerometers, Nicholas. Waters Jan 2012

Detection, Localization, And Identification Of Bearings With Raceway Defect For A Dynamometer Using High Frequency Modal Analysis Of Vibration Across An Array Of Accelerometers, Nicholas. Waters

Electronic Theses and Dissertations 2010 - 2019

This thesis describes a method to detect, localize and identify a faulty bearing in a rotating machine using narrow band envelope analysis across an array of accelerometers. This technique is developed as part of the machine monitoring system of an ocean turbine. A rudimentary mathematical model is introduced to provide an understanding of the physics governing the vibrations caused by a bearing with a raceway defect. This method is then used to detect a faulty bearing in two setups : on a lathe and in a dynamometer.

Go to article

Development And Experimental Testing Of An Amphibious Vehicle, Joseph G. Marquardt Jan 2012

Development And Experimental Testing Of An Amphibious Vehicle, Joseph G. Marquardt

Electronic Theses and Dissertations 2010 - 2019

The development and experimental testing of the DUKW-Ling amphibious vehicle was performed during the first phase of an autonomous amphibious vehicle system development project. The DUKW-Ling is a 1/7th scale model of a cargo transport concept vehicle. The vehicle was tested in the three regions it is required to operate: land, sea and the surf zone region. Vehicle characteristics such as turning radii, yaw rate and velocities were found for different motor inputs on land and water. Also, because a vehicle navigating the surf zone is a new area of research that lacks experimental data the vehicle was tested in …

Go to article

Developing A Photovoltaic Mppt System, Thomas Bennett Jan 2012

Developing A Photovoltaic Mppt System, Thomas Bennett

Electronic Theses and Dissertations 2010 - 2019

Many issues related to the design and implementation of a maximum power point tracking (MPPT) converter as part of a photovoltaic (PV) system are addressed. To begin with, variations of the single diode model for a PV module are compared, to determine whether the simplest variation may be used for MPPT PV system modeling and analysis purposes. As part ot this determination, four different DC/DC converters are used in conjunction with these different PV models. This is to verify consistent behavior across the different PV models, as well as across the different converter topologies. Consistent results across the different PV …

Go to article

Effects Of Freshwater Discharges And Habitat Architecture On Oyster Reef Community Development And Diversity, Elizabeth A. Salewski Jan 2012

Effects Of Freshwater Discharges And Habitat Architecture On Oyster Reef Community Development And Diversity, Elizabeth A. Salewski

Electronic Theses and Dissertations 2010 - 2019

Oyster reefs support diverse estuarine communities and food webs. Factors controlling oyster reef community development were studied on restored reefs in the St. Lucie Estuary. Freshwater discharges create stresses that cause oyster mortality, habitat loss and reduction in reef community diversity. Using structural equation modeling, it was demonstrated that salinity, turbidity, and chlorophyll-a gradients influence oysters and some reef invertebrate species, but did not support the predictions of the Intermediate Disturbance Hypothesis. In contrast, diversity and species richness were greatest at low stress sites. A field experiment showed that topographic relief and architectural complexity enhanced colonization and growth of reef-building …

Go to article

Effect Of Median Grain Size Ratio On The Compaction Behavior Of Binary Granular Mixes, Tara Devine Brenner Jan 2012

Effect Of Median Grain Size Ratio On The Compaction Behavior Of Binary Granular Mixes, Tara Devine Brenner

Electronic Theses and Dissertations 2010 - 2019

Optimization of compaction in granular material without the use of traditional ground improvement methods may be possible by optimizing the percentage of finer material and the median grain size ratio in binary soil mixtures. In this study, the median grain size ratio D50/d50 was explored as a fundamental parpmeter affecting the compaction characteristics of binary mixes made from natural sands as opposed to singular measurements such as fines content and mean grain size traditionally used to represent granular soils. A total of 18 binary granular mixes were synthetically generated from natural sands obtained from Longboat Key, Florida and evaluated through …

Go to article

Estimating The Vulnerability Of Everglades Peat To Combustion, James. Johnson Jan 2012

Estimating The Vulnerability Of Everglades Peat To Combustion, James. Johnson

Electronic Theses and Dissertations 2010 - 2019

Fire occurrences in the Everglades have increased since hydrologic alterations began, yet the vulnerability of Everglades peat to combustion during wildfires has yet to be determined. Natural fire regimes help maintain ecosystem functions and services and disruptions of natural disturbance regimes can have detrimental impacts, jeopardizing ecosystem health. Severe peat combustion can destroy native vegetation, alter microtopography, and release large amounts of stored carbon into the atmosphere. To create a better understanding of the mechanistic controls on Everglades ground fires, the soil's physical properties within several sites of Water Conservation Area 3 and how changes in water table affect these …

Go to article

Exploring Teachers' Perceptions Of Professional Development In Virtual Learning Teams, Courtney Paschal Purnell Jan 2012

Exploring Teachers' Perceptions Of Professional Development In Virtual Learning Teams, Courtney Paschal Purnell

Electronic Theses and Dissertations 2010 - 2019

The demand for virtual education is rapidly increasing due to the proliferation of legislation demanding class size limitations, funding cuts, and school choice across the United States. Virtual education leaders are discovering new ways to enhance and develop teachers to become more efficient and increase quality of learning online. Learning teams are one tool implemented by professional development departments in order to obtain a community of shared best practices and increase professional learning for teachers. ... The purpose of this exploratory case study was to investigate teachers' perceptions of the contribution of virtual learning teams to their professional development in …

Go to article

Fatigue And Fracture Of Foam Cores Used In Sandwich Composites, Elio. Saenz Jan 2012

Fatigue And Fracture Of Foam Cores Used In Sandwich Composites, Elio. Saenz

Electronic Theses and Dissertations 2010 - 2019

This study focused on the fracture and fatigue crack growth behavior in polyvinylchloride (PVC) and polyethersulfone (PES) foams. A new sandwich double cantilever beam (DCB) test specimen was implemented. Elastic foundation and finite element analysis and experimental testing confirmed that the DCB specimen is appropriate for static and cyclic crack propagation testing of soft polymer foams. A comprehensive experimental mechanical analysis was conducted on PVC foams of densities ranging from 45 to 100 kg/m3 and PES foams of densities ranging from 60 to 130 kg/m3. An in-situ scanning electron microscope study on miniature foam fracture specimens showed that crack propagation …

Go to article

Generating Narratives, Samuel. Greene Jan 2012

Generating Narratives, Samuel. Greene

Electronic Theses and Dissertations 2010 - 2019

In order to facilitate the development, discussion, and advancement of the relatively new subfield of Artificial Intelligence focused on generating narrative content, the author has developed a pattern language for generating narratives, along with a new categorization framework for narrative generation systems. An emphasis and focus is placed on generating the Fabula of the story (the ordered sequence of events that make up the plot). Approaches to narrative generation are classified into one of three categories, and a pattern is presented for each approach. Enhancement patterns that can be used in conjunction with one of the core patterns are also …

Go to article

Global Distribution Of Ocean Thermal Energy Conversion (Otec) Resources And Applicability In U.S. Waters Near Florida, Lynn. Rauchenstein Jan 2012

Global Distribution Of Ocean Thermal Energy Conversion (Otec) Resources And Applicability In U.S. Waters Near Florida, Lynn. Rauchenstein

Electronic Theses and Dissertations 2010 - 2019

The following study explores the worldwide spatial and temporal distributions of electrical power that can be extracted from the ocean's stored solar energy via the process of closed-cycle ocean thermal energy conversion (OTEC). Special emphasis is placed on resources surrounding the state of Florida. The study combines oceanographic input from a state-of-the-art ocean circulation model, the Hybrid Coordinate Ocean Model, with a state-of-the-industry OTEC plant model to predict achievable power values across the world. These power predictions are then constrained by local replenishment rates of cold deep sea water to provide an upper limit to the sustainable OTEC resource. Next, …

Go to article

Habitat Selection Among Fishes And Shrimp In The Pelagic Sargassum Community, Chelsea Bennice Jan 2012

Habitat Selection Among Fishes And Shrimp In The Pelagic Sargassum Community, Chelsea Bennice

Electronic Theses and Dissertations 2010 - 2019

Pelagic Sargassum was used to determine the effects of habitat architecture for one species of shrimp (Leander tenuicornis) and two species of fish (Stephanolepis hispidus and Histrio histrio). Inter-thallus spacing (low, medium, and high) and depth (shallow versus deep) were manipulated independently to test whether the spatial components of habitat architecture. Two differing habitats (Sargassum versus seagrass species) were tested for the structural component of habitat architecture. There were no significant results for inter-thallus spacing experiments for L. tenuicornis and S. hispidus. H histrio selected habitats with medium inter-thallus spacing in two treatments. Large individual H. histrio contributed mostly to …

Go to article

High Summer, Martinez Michelle Hasler Jan 2012

High Summer, Martinez Michelle Hasler

Electronic Theses and Dissertations 2010 - 2019

High Summer is a manuscript-length compilation of narrative science essays that trace the relationship the narrator has with her father. These essays focus on the ongoing presence of drugs, their historical basis, and their pharmacological effects on the body.

Go to article

Helicopter Stability During Aggressive Maneuvers, Ranjith. Mohan Jan 2012

Helicopter Stability During Aggressive Maneuvers, Ranjith. Mohan

Electronic Theses and Dissertations 2010 - 2019

The dissertation investigates helicopter trim and stability during level bank-angle and diving bank-angle turns. The level turn is moderate in that sufficient power is available to maintain level maneuver, and the diving turn is severe where the power deficit is overcome by the kinetic energy of descent. The investigation basically represents design conditions where the peak loading goes well beyond the steady thrust limit and the rotor experiences appreciable stall. The major objectives are: 1) to assess the sensitivity of the trim and stability predictions to the approximations in modeling stall, 2) to correlate the trim predictions with the UH-60A …

Go to article

Hope On The Horizon, Valorie. Ebert Jan 2012

Hope On The Horizon, Valorie. Ebert

Electronic Theses and Dissertations 2010 - 2019

This project considers the future, and the hope for humanity within three dystopian science fiction works : Mordecai Roshwald's Level 7, Cordwainer Smith's "The Dead Lady of Clown Town," and James Tiptree, Jr.,'s "The GIrl Who Was Plugged In". There are many aspects and different manifestations of hope in science fiction, even in authors who show readers the darkest side of human nature and what will become of humans, and by default earth, if an effort is not made to change the world's direction. Though some dystopian stories show horrible possible futures, there is an underlying hope within these stories …

Go to article

How Jamaican Administrators In A Large School District In Florida Perceive Ethnicity, Gender, And Mentoring Have Impacted Their Career Experiences, Denise P. Barrett-Johnson Jan 2012

How Jamaican Administrators In A Large School District In Florida Perceive Ethnicity, Gender, And Mentoring Have Impacted Their Career Experiences, Denise P. Barrett-Johnson

Electronic Theses and Dissertations 2010 - 2019

The purpose of this study was to discover how ethnicity, gender, and mentoring influenced the career experiences of Jamaican administrators in Sunshine County Public Schools (SCPS), a pseudonym that was used for a large public school district in Florida. This qualitative, phenomenological study focused on the career experiences of eight Jamaican administrators in SCPS. Seven of the participants were all native-born Jamaicans and one was a first generation Jamaican, born in England to Jamaican parents and raised in Jamaica until the age of 14. The researcher gained this understanding by interviewing participants in-depth about how their Jamaican ethnicity, gender, and …

Go to article

First Prev Next Last