Digital Commons Network^™

An Evaluation Of The Seagrass Habitat In North Biscayne Bay, Florida, In Relation To A Changing Environment And Urbanization In The Port Of Miami Harbor Basin 2005-2011, Sara M. Jarossy

HCNSO Student Theses and Dissertations

Seagrass habitats in South Florida are exceptionally valuable. They play an important ecological role in the coastal environment by stabilizing sediment, providing habitat for other species and supporting a whole food web. The availability of light and nutrients in aquatic ecosystems are the driving factors behind seagrass distribution. Water quality has been known to influence the abundance, distribution and composition of seagrass beds. South Florida has extensive diverse coastal communities. Throughout its human development dramatic changes have occurred in its natural ecosystems. In South Florida, many examples of seagrass habitat loss are documented, with a variety of contributing factors. The …

The Rapture Of Being Alive: Mourning, Narrative, And Communicative Ritual In The Digital Age, Marjorie Merideth Drinan

Theses - ALL

Conversations have an afterlife. But what if the afterlife could have conversations? In that metaphorical space, the author explores how technology and design will engender new communicative rituals and tools of mourning as the semiotics of traditional gravescapes begin to diffuse. This pivot will occur in tandem with the rise of alternative forms of body disposition and growing environmental stewardship in response to increased urbanization and notions of intergenerational equity. Digital space, the postmodern hearth of an ever individualized and fractured society, will enable a plurality of mourning as the idea of legacy is deconstructed within the framework of transhumanism …

The Rapture Of Being Alive: Mourning, Narrative, And Communicative Ritual In The Digital Age, Marjorie Merideth Drinan

Theses - ALL

Conversations have an afterlife. But what if the afterlife could have conversations? In that metaphorical space, the author explores how technology and design will engender new communicative rituals and tools of mourning as the semiotics of traditional gravescapes begin to diffuse. This pivot will occur in tandem with the rise of alternative forms of body disposition and growing environmental stewardship in response to increased urbanization and notions of intergenerational equity. Digital space, the postmodern hearth of an ever individualized and fractured society, will enable a plurality of mourning as the idea of legacy is deconstructed within the framework of transhumanism …

A Review Of Present And Alternative Lionfish Controls In The Western Atlantic, Adam Rittermann

HCNSO Student Capstones

Lionfish (Pterois volitans and Pterois miles) are the first recorded invasive piscivore in the Caribbean and have become a threat to native species. As generalist consumers, lionfish have a broad diet and reduce prey and competitor abundance and juvenile recruitment. To confront this problem, this paper serves to review all of the current and alternative future controls available to manage lionfish populations in the Western Atlantic and determine where focus is lacking. Derby and cull efforts are the only management efforts in place and are not effective in their current state as these local events have short-term benefits, …

Thermo-Hydro-Mechanical Modeling Of Induced Seismicity In Carbon Sequestration Projects, Kimia Mortezaei

Theses and Dissertations

The ultimate goal of this project is to comprehensively investigate induced seismicity potential by studying the behavior of fault shear zones during high pressure CO2 injection for utilization and storage operations. Seismicity induced by fluid injection is one of the major concerns associated with recent energy technologies such as Carbon capture and storage (CCS) projects. CO2 injection increases reservoir pore pressure and decreases the effective stress causing deformation that can degrade the storage integrity by creating new fractures and reactivating faults. The first consequence is that reactivation of faults and fractures create a pathway for upward CO2 migration. The increased …

Predictive Capabilities Of Advanced Turbulence Models In The Wake Region Of A Wall Mounted Cube, Benjamin Hugh Taylor

Theses and Dissertations

This thesis seeks to investigate the predictive capabilities of Advanced turbulence models in the wake region of a wall-mounted cube. Dynamic Hybrid RANS/LES (DHRL), Hybrid RANS/LES (HRL) models, Nonlinear Explicit Algebraic Reynolds Stress Model (NEARSM), One- and Two-equation models, and numerical flux schemes will be compared against Direct Numerical Simulation (DNS) results to determine which model, or combination of models, produce the closest replication. The simulations were ran in Loci-Chem using both built-in features and modular code additions. The simulation results show the Shear Stress Transport (SST) model ran with NEARSM and Optimized Gradient REconstruction (OGRE) scheme gives better results …

Sensitivity Analysis And Parameter Estimation For The Apex Model On Runoff, Sediments And Phosphorus, Yi Jiang

Theses and Dissertations

Sensitivity analysis is essential for the hydrologic models to help gain insight into model’s behavior, and assess the model structure and conceptualization. Parameter estimation in the distributed hydrologic models is difficult due to the high-dimensional parameter spaces. Sensitivity analysis identified the influential and non-influential parameters in the modeling process, thus it will benefit the calibration process. This study identified, applied and evaluated two sensitivity analysis methods for the APEX model. The screening methods, the Morris method, and LH-OAT method, were implemented in the experimental site in North Carolina for modeling runoff, sediment loss, TP and DP losses. At the beginning …

Characterization Of Microparticles Through Digital Holography, Nava Raj Subedi

Theses and Dissertations

In this work, digital holography (DH) is extensively utilized to characterize microparticles. Here, “characterization” refers to the determination of a particle’s shape, size, and, in some cases, its surface structure. A variety of microparticles, such as environmental dust, pollen, volcanic ash, clay, and biological samples, are thoroughly analyzed. In this technique, the microscopically fine interference pattern generated by the coherent superposition of an object and a reference wave fields is digitally recorded using an optoelectronic sensor, in the form of a hologram, and the desired particle property is then computationally extracted by performing a numerical reconstruction to form an image …

Strategies For Reduced Unburned Hydrocarbon And Carbon Monoxide Emissions In Diesel Propane Dual Fuel Low Temperature Combustion, Kyle Anthony Hodges

Theses and Dissertations

The present manuscript discusses the use of two diesel injections in diesel-ignited propane dual fuel Low Temperature Combustion (LTC). Using propane fumigation into the intake runners of a single cylinder research engine, the maximum and minimum percent energy substitution (PES) values were obtained to be 90% and 53%, respectively at 3.3 bar BMEP. An optimal PES value of 80% was used to explore the effects of a secondary injection on the engine-out emissions. The secondary injection proved to have a strong influence on combustion phasing (CA50). As combustion is phased closer to TDC the IFCE shows and increase of 4% …

Senior Recital: Selena Sanchez, Percussion, Selena Sanchez

Bailey School of Music Concert Programs

This recital is presented in partial fulfillment of requirements for the degree Bachelor of Music in Music Education. Ms. Sanchez studies percussion with John Lawless.

Optimization And Decision Making Under Uncertainty For Distributed Generation Technologies, Carlos Antonio Marino

Theses and Dissertations

This dissertation studies two important models in the field of the distributed generation technologies to provide resiliency to the electric power distribution system. In the first part of the dissertation, we study the impact of assessing a Combined Cooling Heating Power system (CCHP) on the optimization and management of an on-site energy system under stochastic settings. These mathematical models propose a scalable stochastic decision model for large-scale microgrid operation formulated as a two-stage stochastic linear programming model. The model is solved enhanced algorithm strategies for Benders decomposition are introduced to find an optimal solution for larger instances efficiently. Some observations …

[2016-12-09] Meeting Of The Finance, Investment And Property Committee, Virginia Commonwealth University. Board Of Visitors

VCU Board of Visitors Minutes

Official minutes of the VCU Board of Visitors and its Executive Committee.

Multimodal Imaging Of Photoreceptor Structure In Choroideremia, Lynn W. Sun, Ryan D. Johnson, Vesper Williams, Phyllis Summerfelt, Alfredo Dubra, David V. Weinberg, Kimberly E. Stepien, Gerald A. Fishman, Joseph Carroll

Biomedical Engineering Faculty Research and Publications

Purpose

Choroideremia is a progressive X-linked recessive dystrophy, characterized by degeneration of the retinal pigment epithelium (RPE), choroid, choriocapillaris, and photoreceptors. We examined photoreceptor structure in a series of subjects with choroideremia with particular attention to areas bordering atrophic lesions.

Methods

Twelve males with clinically-diagnosed choroideremia and confirmed hemizygous mutations in the CHM gene were examined. High-resolution images of the retina were obtained using spectral domain optical coherence tomography (SD-OCT) and both confocal and non-confocal split-detector adaptive optics scanning light ophthalmoscope (AOSLO) techniques.

Results

Eleven CHM gene mutations (3 novel) were identified; three subjects had the same mutation and one …

Postdischarge Calls In The Ed: Improving Quality And Efficiency, Megan E. Pashnik

Master's Projects

No abstract provided.

Daily Eastern News: December 09, 2016, Eastern Illinois University

December

No abstract provided.

Hydraulic And Hydrologic Properties Of The Sabine River, Annie L. Bryant

Civil Engineering Theses

The Sabine River is located in Northeast Texas and is home to many threatened and endangered species as well as a growing human population. It is important to understand channel properties and flow characteristics of rivers in order better manage these important natural resources. The Sabine was monitored for hydraulic and hydrological properties as this is a poorly understood river at this point in time.

Hydraulic modeling was conducted to determine channel velocities and shear stresses during different storm frequencies. It was found that velocity and shear stress had a direct relationship at lower velocities. A comparison of existing Geographic …

Data Logging System For A Synthetic Aperture Radar Unit, Nicholas J. Testin, Philip Davis, Ian Dorell, Alexander Gillespie

KSU Journey Honors College Capstones and Theses

A small, existing radar unit lacked the ability to automatically store the data it was receiving, which made its use clunky and cumbersome. A system was constructed to allow an on-board microprocessor to track distance traveled, and automatically store the data output from the radar unit to a portable memory unit for later data processing. Distance traveled is determined using a specially designed mobile cart, which electronically converts the rotation of a wheel into an electrical signal while also providing stability for taking accurate radar measurements. The output data from the radar unit is stored as a properly-formatted sound file …

Technical Debt Decision-Making Framework, Zadia Codabux

Theses and Dissertations

Software development companies strive to produce high-quality software. In commercial software development environments, due to resource and time constraints, software is often developed hastily which gives rise to technical debt. Technical debt refers to the consequences of taking shortcuts when developing software. These consequences include making the system difficult to maintain and defect prone. Technical debt can have financial consequences and impede feature enhancements. Identifying technical debt and deciding which debt to address is challenging given resource constraints. Project managers must decide which debt has the highest priority and is most critical to the project. This decision-making process is not …

Design And Frequency Characterization Of Dual-Piezoresponsive Foam Sensors, Cory Nelson Newton

Theses and Dissertations

Multifunctional "self-sensing" materials at the frontiers of current research are generally designed to gather only a single type of information (such as quasi-static strain data). This project introduces a new sensor that is both multifunctional and dual-response, indicating its ability to not only perform in mechanical and sensing functions but also in its ability to sense multiple types of response. The proposed new class of sensing materials, comprised of nanocomposite polymer foams, exhibits measurable piezoresistive and quasi-piezoelectric phenomena in the form of change in resistance and voltage generation in response to deformation, respectively. An initial sampling of the envelope of …

Fall Commencement Ceremonies, University Of North Florida

Commencement Printed Materials

Program for the Fall Commencement ceremonies.

Management Of Coastal Navigation Channels Based On Vessel Underkeel Clearance In Transit, Brandan Scully

Theses and Dissertations

The United States Army Corps of Engineers (USACE) spends approximately $2 billion annually to investigate, construct, and maintain projects in its portfolio of coastal navigation infrastructure. Of that expenditure, approximately $1 billion is spent annually on maintenance dredging to increase the depth of maintained channels. The USACE prioritizes maintenance funding using a variety of metrics reflecting the amount of cargo moving through maintained projects but does not directly consider the reduction in the likelihood for the bottom of a vessel's hull to make contact with the bottom of the channel that results from maintenance dredging investments. Net underkeel clearance, which …

Network Interdiction Models And Algorithms For Information Security, Apurba Kumer Nandi

Theses and Dissertations

Major cyber attacks against the cyber networks of organizations has become a common phenomenon nowadays. Cyber attacks are carried out both through the spread of malware and also through multi-stage attacks known as hacking. A cyber network can be represented directly as a simple directed or undirected network (graph) of nodes and arcs. It can also be represented by a transformed network such as the attack graph which uses information about network topology, attacker profile, and existing vulnerabilities to represent all the potential attack paths from readily accesible vulnerabilities to valuable target nodes. Then, interdicting or hardening a subset of …

Numerical Investigation Of Airfoil Self-Noise Generation At Low Reynolds Number, Tarik Lyas

Theses and Dissertations

In the advent of increasing the number of operable unmanned aerial systems (UAS) over the next years, a challenge exists in regard to the noise signature that these machines may generate. In this work, we perform advanced computational simulations to study the flow around an airfoil and the associated noise radiating to the near- and farield. The airfoil size and the freestream velocity are representative of a typical UAS. The study is aimed at investigating the characteristics of the aerodynamic noise radiating from an airfoil at various angles of attack, Reynolds number and Mach number. The numerical tool is a …

Validation Of A Mesh Generation Strategy For Predicting Ice Accretion On Wings, Rania Bassou

Theses and Dissertations

Researchers have been developing techniques to predict inlight icing in order to determine aircraft behavior under different icing conditions. A key component of the techniques is the mesh generation strategy. Automated meshing facilitates numerical simulation of ice accretion on realistic aircraft configurations by deforming the surface and volume meshes in response to the evolving ice shape. The objective of this research is to validate an ice accretion strategy for wings, using a previously developed meshing strategy. The intent is to investigate the effect of varying numerical parameters, on the predicted ice shape. Using this framework, results are simulated for rime …

Power Generation And Solar Panels For An Msu Cubesat, Soundouss Sassi

Theses and Dissertations

This thesis is a power generation study of a proposed CubeSat at Mississippi State University (MSU). CubeSats are miniaturized satellites of 10 x 10 x 10 cm in dimension. Their power source once in orbit is the sun during daylight and the batteries during eclipse. MSU CubeSat is equipped with solar panels. This effort will discuss two types of cells: Gallium Arsenide and Silicon; and which one will suit MSU CubeSat best. Once the cell type is chosen, another decision regarding the electrical power subsystem will be made. Solar array design can only be done once the choice of the …

Large Eddy Simulation Study Of The Effect Of Large Wind Farms On Humidity, Oumnia El Fajri

Theses and Dissertations

Atmospheric boundary layer flows around wind turbines distributed in a large wind farm can be examined by the use of large eddy simulation (LES), which is based on the assumption that large eddies in the flow are anisotropic and depend on the mean flow and the configuration geometry, while smaller eddies are isotropic and homogeneous, and can be modeled via subgrid scale models. In this thesis, a pseudo-spectral LES code with inflow conditions imposed through a precursor concurrent simulation is utilized to model the flow around a single wind turbine or a large wind farm operating in thermally-stratified conditions. The …

Investigating The Antigen Removal Process Of Porcine Cartilage In Preparation Of Creating An Osteochondral Xenograft, Bradley Jeffery Kindred

Theses and Dissertations

With Athletes and individuals developing osteoarthritis and chondral defects at younger ages, long term treatments are in high demand. Total knee replacements only last for 10-15 years, so younger individuals would need to have multiple knee replacements within their lifetime. Allograft transplantation has shown to last long term and have high success rates, but the lack of donors and the possibility of damaging other areas of the knee to obtain tissue grafts has become a large concern. Xenografts derived from porcine cartilage is cost effective and the supply is abundant. Two antigen removal processes were examined: a short term antigen …

Multimodal Spontaneous Emotion Corpus For Human Behavior Analysis, Zheng Zhang, Jeffrey M. Girard, Yue Wu, Xing Zhang, Peng Liu, Umur Ciftci, Shaun Canavan, Michael Reale, Andrew Horowitz, Huiyuan Yang, Jeffrey F. Cohn, Qiang Ji, Lijun Yin

Computer Science Faculty Research & Creative Works

Emotion is expressed in multiple modalities, yet most research has considered at most one or two. This stems in part from the lack of large, diverse, well-annotated, multimodal databases with which to develop and test algorithms. We present a well-annotated, multimodal, multidimensional spontaneous emotion corpus of 140 participants. Emotion inductions were highly varied. Data were acquired from a variety of sensors of the face that included high-resolution 3D dynamic imaging, high-resolution 2D video, and thermal (infrared) sensing, and contact physiological sensors that included electrical conductivity of the skin, respiration, blood pressure, and heart rate. Facial expression was annotated for both …

How Understanding The Nature Of Corporate Norms Can Prevent Their Destruction By Settlements, James D. Cox

Duke Law Journal

Scholars have long celebrated the importance of norms in corporate law. Indeed, norms likely guide corporate actors more than the omnipresent threat of shareholder suits. This Article divides corporate norms into two distinct groups: aspirational norms and arbiter norms. Aspirational norms announce socially desirable objectives for corporate managers and encourage certain disclosure practices; arbiter norms identify distinct transactions for closer scrutiny by an independent body, the court. This Article shows that even though aspirational norms and arbiter norms serve different objectives, they share a common characteristic—overbreadth. This feature exists whether the norm is set forth by statute or found in …

Using The False Claims Act To Remedy Tax-Expenditure Fraud, Ian Ayres, Robert Mcguire

Duke Law Journal

The federal False Claims Act (FCA) may be a tool for combating fraudulent claims regarding tax expenditures. The FCA has been used to protect the public fisc by imposing liability upon anyone who makes a false or fraudulent claim relating to an expenditure of federal funds. A substantial share of government spending is implemented through tax credits and deductions granted to individuals and entities for taking particular actions promoted by the tax code—so-called “tax expenditures.” Funds subsidized by such tax expenditures can themselves be the objects of fraud. For example, a taxpayer could be defrauded of retirement funds that the …