Engineering Commons^™

Economically Rational Trading Between The All Island Single Electricity Market And Great Britain; Theory Vs Practice, Aoife Wilson

Masters

Economic trading across electricity interconnectors is considered to be a key factor in delivering the economic welfare benefits of an integrated European electricity market. This research examines this assumption as it applies to the interconnection between the electricity markets in Ireland, Northern Ireland and Great Britain. In doing so it reviews the assumption of economically rational trading behaviour by participants in the market. This assumption underpinned the cost benefit studies justifying construction of the East-West interconnector. Actual patterns of trading that have arisen post commissioning are compared with projected rational behaviour.

The research also considers the consequences of these behavioural …

Fabrication And Comparison Of Electrospun Cobalt Oxide-Antimony Doped Tin Oxide (Coo-Ato) Nanofibers Made With Ps: D-Limonene And Ps: Toluene, Manopriya Devisetty Subramanyam

USF Tampa Graduate Theses and Dissertations

This work investigates the fabrication, process optimization, and characterization of cobalt oxide-antimony doped tin oxide (CoO-ATO) nanofibersusing polystyrene (PS) solutions with toluene orD-limonene as solvents. These nanofibers are produced by anelectrospinning process. Nanofibers are fabricated using polymeric solutions of CoO doped ATO and mixtures of PS: D-limonene and PS:toluene. PSis a base aromatic organic polymer, a non-toxic material, and a versatile catalyst for fiber formation. PSsolutions are made by mixing polystyrene beads and D-limonene or toluene at specific weight percentages. These polymeric solutions of PS: D-limonene and PS:toluene are then mixed with CoO-ATO at various weight percentages. The two solutions …

Aerodynamic Optimization Of Box Wing – A Case Study, Adeel Khalid, Parth Kumar

International Journal of Aviation, Aeronautics, and Aerospace

The optimization of a possible medium range box wing commercial airliner is presented in three stages. Preliminary research is used to determine various parameters for a potential box wing model, and a baseline model is designed in Autodesk Inventor, based upon the cantilever Airbus A330-200, an aircraft of a similar role. The Computational Fluid Dynamics (CFD) software used in this project is Dassault Systèmes SolidWorks, which is validated through comparing the NACA 0009 airfoil lift and drag polars with published results. The first stage of optimization is performed on the airfoil shape, with 8 different designs being tested against the …

Residual-Based Variational Multiscale Les With Wall-Modeling For Oceanic Boundary Layers In Shallow Water, Roozbeh Golshan

USF Tampa Graduate Theses and Dissertations

Large-eddy simulation (LES) of wind and wave forced oceanic turbulent boundary layers is performed using the residual-based variational multiscale method (RBVMS) and near-wall modeling. Wind and surface gravity wave forcing generates Langmuir turbulence characterized by Langmuir circulation (LC) with largest scales consisting of streamwise vortices aligned in the direction of the wind, acting as a secondary flow structure to the primary wind-driven component of the flow. The LES here is representative of a shallow water continental shelf flow (10 to 30 meters in depth) far from lateral boundaries in which LC engulfs the full depth of the water column and …

Quantification Of Protein Adhesion Strength To Surface Attached Poly (N- Isopropylacrylamide) Networks By Hydrodynamic Detachment Shear Stresses, Gulnur Sanden

USF Tampa Graduate Theses and Dissertations

Stimuli responsive coatings offer a versatile method by which to manipulate interfacial interactions of proteins in a desired way. However, there exists little guidance as to how the structure of a responsive polymer coating influences adsorption of proteins. In this dissertation, the adsorption behavior of immuglobulin G (IgG) on poly (N-isopropylacryamide) (PNIPAAm) hydrogel coatings was investigated as a function of film thickness. PNIPAAm exhibits a hydrophilic to hydrophobic transition above a critical temperature of ~32°C in aqueous solutions. In this research, through the use of quartz crystal microbalance with dissipation (QCM-D) it was observed that the adsorption was thickness dependent …

College Of Engineering News, Georgia Southern University

College of Engineering & Computing: News & Publications (2010-2023)

• CM Study Abroad in South Korea

Exploration Of Electrodeposition Of Aluminum-Nickel Alloys And Multilayers In Organic Chloroaluminate Ionic Liquids, Ammar Bin Waqar

USF Tampa Graduate Theses and Dissertations

Aluminum-nickel (Al-Ni) alloys and Al/Ni bilayers were successfully electrodeposited from AlCl₃-EMIM-NiCl₂ electrolyte at room temperature. Dissolution of NiCl₂ was shown to be favorable in Lewis basic (with molar ratio of AlCl₃ < 0.5) AlCl₃-EMIM solution. The use of electrochemically active Cu working electrode as opposed to inert W induced additional Cu oxidation and dissolution in the cyclic voltammetry scan. The reduction potentials of Al and Ni were found to be ~ – 0.3 and 0.15 V vs. Al/Al³⁺ respectively. Increasing [NiCl₂] in the electrolyte leads to an increase of Ni concentration in the …

Reliable Design And Operations Of Infrastructure Systems, Yu An

USF Tampa Graduate Theses and Dissertations

The reliability issue of the infrastructure systems has become one of the major concerns of the system operators. This dissertation is a collection of four published and working papers that address the specific reliable design and operations problems from three different application settings: transportation/telecommunications network, distribution network, and power plant. In these four projects, key random factors like site disruption and uncertain demand are explicitly considered and proper research tools including stochastic programming, robust optimization, and variants of robust optimization are applied to formulate the problems based on which the important and challenging modelling elements (nonlinear congestion, disruption caused demand …

Investigating The Release Mechanism Of Calcein From Eliposomes At Higher Temperatures, Ghaleb A. Husseini, William G. Pitt, Jacob B. Williams, Marjan Javadi

Faculty Publications

Numerous nanocarriers are currently being investigated as drug delivery vehicles for transporting chemotherapeutics to cancer cells. Our research group has recently synthesized a new generation of echogenic liposomes based on the concept of encapsulating one or more nanoemulsion droplets inside a liposome (called an “eLiposome”). The concept is to use a nanoemulsion droplet with a low boiling point near body temperature, thus requiring only a small acoustic nudge to vaporize the droplet from liquid to gas and break open the eLiposome, thus releasing its contents. The purpose of this note is twofold. First, we wanted to show experimentally that eLiposomes …

Conceptualization Of A Photovoltaic Powered Electrochromic Switching Of A Multifunctional Glazing, Aritra Ghosh, Brian Norton, Aidan Duffy

Conference papers

A multifunctional glazing system has the potential to reduce the heat loss through a window with control of solar heat gain and daylight. Thus it can reduce both the cooling load and heating load depending on weather, occupancy and building construction. A photovoltaic (PV) panel can be used to generate energy to change the colour of the electrochromic (EC) material. Battery storage system has been included to activate the EC behaviour using stored solar electricity. PV area and cost can thus be smaller. As a window can be placed in different sides of a building, incident solar irradiation on a …

Ammonia Measurements And Emissions Estimates From A California, Usa Dairy Using Both Point And Remote Sensors, Kori Moore, Emyrei Young, Cassi Gurell, Michael Wojcik, Randall Martin, Gail Bingham, Richard Pfeiffer, John Prueger, Jerry Hatfield

Space Dynamics Laboratory Publications

Background

• Question: How much does a US open lot dairy contribute to local and regional PM loadings?
• • Primary PM: dust, combustion sources
  • Secondary PM: NH₃, NO_x, SO_x, VOCs
  • Climate, housing, manure management, and other confounding factors
• Emissions measurements are required to help answer this question
• Study Objective:
  • Characterize PM_2.5, PM₁₀, TSP, and gaseous NH₃concentrations, fluxes, and emissions from a commercial dairy using both point and remote sensing techniques
  • Results reported in:
    • Marchant et al. 2011. Estimation of dairy particulate matter emissions from a California dairy …Trans. ASABE …

Going From Microbial Ecology To Genome Data And Back: Studies On A Haloalkaliphilic Bacterium Isolated From Soap Lake, Washington State, Melanie R. Mormile

Biological Sciences Faculty Research & Creative Works

Soap Lake is a meromictic, alkaline (∼pH 9.8) and saline (∼14-140 g liter^-1) lake located in the semiarid area of eastern Washington State. Of note is the length of time it has been meromictic (at least 2000 years) and the extremely high sulfide level (∼140 mM) in its monimolimnion. As expected, the microbial ecology of this lake is greatly influenced by these conditions. A bacterium, Halanaerobium hydrogeniformans, was isolated from the mixolimnion region of this lake. Halanaerobium hydrogeniformans is a haloalkaliphilic bacterium capable of forming hydrogen from 5- and 6-carbon sugars derived from hemicellulose and cellulose. Due …

Development Of A High Precision Quantum Dot Synthesis Method Utilizing A Microfluidic Reactor And In-Line Fluorescence Flow Cell, William Henry Lafferty

Master's Theses

Quantum dots show great potential for use as spectral converters in solar cells, lighting applications, and biological imaging. These applications require precise control of quantum dot size to maximize performance. The quality, size, and fluorescence of quantum dots depend on parameters that are difficult to control using traditional batch synthesis processes. An alternative, high precision process was developed for the synthesis of cadmium-selenide quantum dots using a microfluidic reactor and fluorescence flow cell. The process required creating separate cadmium and selenium precursors that were then mixed in a nitrogen environment at 17°C. Using an NE-300^® syringe pump, the solution …

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Spanning The Complexity Chasm: A Research Approach To Move From Simple To Complex Engineering Systems, Vimal Viswanathan, Julie Linsey

Faculty Publications, Mechanical Engineering

A multistudy approach is presented that allows design thinking of complex systems to be studied by triangulating causal controlled lab findings with coded data from more complex products. A case study illustration of this approach is provided. During the conceptual design of engineering systems, designers face many cognitive challenges, including design fixation, errors in their mental models, and the sunk cost effect. These factors need to be mitigated for the generation of effective ideas. Understanding the effects of these challenges in a realistic and complex engineering system is especially difficult due to a variety of factors influencing the results. Studying …

Comparison Of Individual And Moving Range Chart Combinations To Individual Charts In Terms Of Arl After Designing For A Common “All Ok” Arl, Dewi Rahardja

Journal of Modern Applied Statistical Methods

In some process monitoring situations, consecutive measurements are spaced widely apart in time, making monitoring process aim and spread difficult. This study uses three cases to compare the effectiveness of two such monitoring schemes, i.e., the X chart alone (X-only chart) and the Individuals and Moving Range Chart Combination (X/MR chars), in terms of Average Run Length (ARL) after designing for a common “all OK” (in-control) ARL. The study finds that X chart alone is sufficient (and hence, recommended) in detecting changes in all the 3 cases: changes in the process mean, changes in the process standard deviation, and changes …

Solar Power Deployment: Forecasting And Planning, Mohana Shandal Alanazi

Electronic Theses and Dissertations

The rapid growth of Photovoltaic (PV) technology has been very visible over the past decade. Recently, the penetration of PV plants to the existing grid has significantly increased. Such increase in the integration of solar energy has brought attention to the solar irradiance forecasting. This thesis presents a thorough research of PV technology, how solar power can be forecasted, and PV planning under uncertainty.

Over the last decade, the PV was one of the fastest growing renewable energy technologies. However, the PV system output varies based on weather conditions. Due to the variability and the uncertainty of solar power, the …

Hosting Capacity Calculations In Power Systems, Mansoor T. Alturki

Electronic Theses and Dissertations

The aim of this thesis is to investigate and calculate Hosting Capacity in power systems to identify the maximum amount of renewable energy resources that can be deployed. After connecting distributed generation to distribution system, the performance index of the distribution system will improve or deteriorate. The point which is between the acceptable deterioration and unacceptable deterioration is the hosting capacity. This research is specifically concerned with the effect of increasing distributed generation on the performance index in distribution networks and finding the maximum point of the acceptable deterioration.

The hosting capacity is the amount of distributed generation that can …

Statistical Scheduling Of Economic Dispatch And Energy Reserves Of Hybrid Power Systems With High Renewable Energy Penetration, Yi Gu

Electronic Theses and Dissertations

A statistical scheduling approach to economic dispatch and energy reserves is proposed in this paper. The proposed approach focuses on minimizing the overall power operating cost with considerations of renewable energy uncertainty and power system security. A hybrid power system generates electricity from both conventional and renewable energy sources. In such a system, it is challenging and yet an open question on the scheduling of economic dispatch together with energy reserves, due to renewable energy generation uncertainty, and spatially wide distribution of energy resources. The hybrid power system scheduling is formulated as a convex programming problem to minimize power operating …

Condition Monitoring System Of Wind Turbine Generators, Khaled Bubaker Abdusamad

Electronic Theses and Dissertations

The development and implementation of the condition monitoring systems (CMS) play a significant role in overcoming the number of failures in the wind turbine generators that result from the harsh operation conditions, such as over temperature, particularly when turbines are deployed offshore. In order to increase the reliability of the wind energy industry, monitoring the operation conditions of wind generators is essential to detect the immediate faults rapidly and perform appropriate preventative maintenance. CMS helps to avoid failures, decrease the potential shutdowns while running, reduce the maintenance and operation costs and maintain wind turbines protected. The knowledge of wind turbine …

Cavitation In Vial Drop Subjected To Mechanical Shock, Houman Babazadehrokni

Electronic Theses and Dissertations

Cavitation is a phenomenon that occurs when the local pressure falls down below the critical pressure. Previous work from the Randolph lab demonstrated that protein aggregates can form when a vial of therapeutic solution is dropped onto a hard surface. The process by which this occurs is most likely shock induced cavitation. During this process, hot spots can be created with temperatures and pressures reaching thousands of Kelvin and hundreds of atmospheres, respectively, leading to degradation of protein therapeutics. This work will extend previous efforts by exploring differences generated by change in vial materials, solutions, drop methods and fill volumes. …

Crystallographic Changes In Lead Zirconate Titanate Due To Neutron Irradiation, Alexandra Henriques, Joseph T. Graham, Sheldon Landsberger, Jon F. Ihlefeld, Geoff L. Brennecka, Donald W. Brown, Jennifer S. Forrester, Jacob L. Jones

Nuclear Engineering and Radiation Science Faculty Research & Creative Works

Piezoelectric and ferroelectric materials are useful as the active element in non-destructive monitoring devices for high-radiation areas. Here, crystallographic structural refinement (i.e., the Rietveld method) is used to quantify the type and extent of structural changes in PbZr_0.5Ti_0.5O₃ after exposure to a 1 MeV equivalent neutron fluence of 1.7x10¹⁵ neutrons/cm². The results showa measurable decrease in the occupancy of Pb and O due to irradiation, with O vacancies in the tetragonal phase being created preferentially on one of the two O sites. The results demonstrate a method by which the …

Faculty Research Interest Database, David Owerbach

Office of Research Institutional Research and Scholarship

No abstract provided.

A New Transfer Impedance Based System Equivalent Model For Voltage Stability Analysis, Yang Wang, Caisheng Wang, Feng Lin, Wenyuan Li, Le Yi Wang, Junhui Zhao

Electrical & Computer Engineering and Computer Science Faculty Publications

This paper presents a new transfer impedance based system equivalent model (TISEM) for voltage stability analysis. The TISEM can be used not only to identify the weakest nodes (buses) and system voltage stability, but also to calculate the amount of real and reactive power transferred from the generator nodes to the vulnerable node causing voltage instability. As a result, a full-scale view of voltage stability of the whole system can be presented in front of system operators. This useful information can help operators take proper actions to avoid voltage collapse. The feasibility and effectiveness of the TISEM are further validated …

Winegrape Vineyards And Winery Operations: Energy Efficiency/ Sustainability And Expansion, Stuart Styles, Sierra Layous, Sarah Crable

BioResource and Agricultural Engineering

Southern California Edison (SCE) provides utility services to the greater southern California area. Vineyards and wineries exist throughout the region, and historical data suggests that that they largely do not utilize incentive programs offered by the utility.

As the first phase in a larger study, the Irrigation Training & Research Center (ITRC), located at the California Polytechnic State University, San Luis Obispo, completed a characterization of the vineyard and winery sector as it pertains to energy and water usage in SCE’s service area, including the following major tasks:

1. Identification of vineyard and winery demographics in SCE’s service area.
2. Identification of …

Integrating Remote Sensing Of Evapotranspiration With Applied Water To Target Potential Water Conservation Projects In Watersheds, Daniel J. Howes, Stuart Styles

BioResource and Agricultural Engineering

The overall purpose of the project is to develop a methodology for watershed managers to successfully target and release recommendations to growers that could benefit from improved on-farm irrigation management. Initially it was thought that the methodology could rely on remote sensing of actual crop evapotranspiration, effective rainfall estimates, and water application information (pumped volumes and surface water deliveries) to simply evaluate if fields and farms that applied significantly more water than plants needed could be identified. However, it became clear that, in this region specifically, additional information on water quality, crop sensitivity to salinity, and an assumed good irrigation …

Evaluating Net Groundwater Use From Remotely Sensed Evapotranspiration And Water Delivery Information, Daniel J. Howes, Charles M. Burt, Lucas Hoffman

BioResource and Agricultural Engineering

A detailed, comprehensive, and accurate identification of groundwater aquifer properties will likely never be fully achieved because of the high degree of variability and costs that testing involves. Furthermore, accurate estimates of boundary conditions are essential for groundwater modeling so that investigations of improved management scenarios can be conducted. The lack of key input values at the ground surface boundary limits the ability to accurately assess aquifer dynamics. Of major importance is actual evapotranspiration (water consumption or the loss of water to the atmosphere through transpiration and evaporation). The Irrigation Training and Research Center (ITRC) modified remotely sensed satellite imagery …

Multi-Modal, Surface-Focused Anticoagulation Using Poly-2-Methoxyethylacrylate Polymer Grafts And Surface Nitric Oxide Release, Surbhi Gupta, Kagya Amoako, Ahmed Suhaib, Keith E. Cook

Mechanical and Industrial Engineering Faculty Publications

This study examines platelet adhesion on surfaces that combine coatings to limit protein adsorption along with “anti-platelet” nitric oxide (NO) release. Uncoated and poly-2-methoxyethylacrylate (PMEA) coated, gas permeable polypropylene (PP) membranes were placed in a bioreactor to separate plasma and gas flows. Nitrogen with 100/500/1000 ppm of NO was supplied to the gas side as a proof of concept. On the plasma side, platelet rich plasma (PRP, 1 × 108 cell/mL) was recirculated at low (60)/high (300) flows (mL/min). After 8 hours, adsorbed platelets on PP was quantified via a lactate dehydrogenase assay. Compared to plain PP, the PMEA coating …

Vulnerability Assessment And Re-Routing Of Freight Trains Under Disruptions: A Coal Supply Chain Network Application, Ridvan Gedik, Hugh Medal, Chase Rainwater, Edward A. Pohl, Scott J. Mason

Mechanical and Industrial Engineering Faculty Publications

In this paper, we present a two-stage mixed integer programming (MIP) interdiction model in which an interdictor chooses a limited amount of elements to attack first on a given network, and then an operator dispatches trains through the residual network. Our MIP model explicitly incorporates discrete unit flows of trains on the rail network with time-variant capacities. A real coal rail transportation network is used in order to generate scenarios to provide tactical and operational level vulnerability assessment analysis including rerouting decisions, travel and delay costs analysis, and the frequency of interdictions of facilities for the dynamic rail system.

Coagulation-Ceramic Membrane Filtrati On For U.S. Surface Water Treatment Summary, Tanju Karanfil, Amir Y. Alansari, James E. Amburgey, Meric Selbes, Jaehong Kim, Seungjin Lee, Yonggyun Park

Publications

The objective of this project was to conduct a systematic pilot-scale investigation of a hybrid coagulation-ceramic membrane treatment system to gain fundamental insights about necessary pretreatment conditions, fouling mechanisms, and contaminant removal capabilities, using two U.S. surface water sources. A two-phase plan was implemented for each of the three coagulants considered in this study: aluminum sulfate, aluminum chlorohydrate, and ferric chloride. The first phase involved the optimization of the coagulation pretreatment conditions that provided the best performance in terms of particle removal, organics removal, and membrane fouling. The second phase involved a comprehensive performance evaluation of the optimized system. The …