Engineering | Open Access Articles | Digital Commons Network™

Design And Fabrication Of A 1/3 Scale Gemini-Style Capsule, Toshawnka Walker, Jonathan Davis, Brockton Thompson, Ryohsuke Aoki

Von Braun Symposium Student Posters

No abstract provided.

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Poias Philoctetes/Okyrhoe Integrated Asteroid Surveyor, Ian Maddox

Von Braun Symposium Student Posters

No abstract provided.

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Ahhhhhhh! Earthquake!, Jarred Green, Eugene Lasarge, Brittany Marcott, Maigan Matthias, Matthew Watts

Von Braun Symposium Student Posters

No abstract provided.

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Formula Sae Preliminary Aerodynamic Design, Robert Coates, Matt Wright

Von Braun Symposium Student Posters

No abstract provided.

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Noegenetic Io Monitoring Observernimo, William Daniels

Von Braun Symposium Student Posters

No abstract provided.

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Work In Progress - Role Of Faculty In Promoting Lifelong Learning: Initial Findings, John Chen, Susan M. Lord, Katharyn Nottis, Michael Prince, Candice Stefanou, Jonathon Stolk

Mechanical Engineering

Calls for educational reform emphasize the need for student-centered learning approaches that foster lifelong learning. To be a lifelong learner includes characteristics consistent with those of self-directed learners, such as being curious, motivated, reflective, analytical, persistent, flexible, and independent. Instructor support of students’ self-directed learning (SDL) development relies on understanding and balancing these factors in the classroom. Engineering educators play a critical role in influencing outcomes related to SDL through their design of courses that support students’ transitions from controlled to autonomous learning behaviors. This study will examine a variety of engineering courses and pedagogical approaches. Each will be characterized …

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Understanding The Interaction Between Blood Flow And An Applied Magnetic Field, Francy L. Sinatra

USF Tampa Graduate Theses and Dissertations

Hemodynamic monitoring is extremely important in the accurate measurement of vital parameters. Current methods are highly invasive or noncontinuous, and require direct access to the patient’s skin. This study intends to explore the modulated magnetic signature of blood method (MMSB) to attain blood flow information. This method uses an applied magnetic field to magnetize the iron in the red blood cells and measures the disturbance to the field with a magnetic sensor [1]. Exploration will be done by experimentally studying in-vitro, as well as simulating in COMSOL the alteration of magnetic fields induced by the flow of a magnetic solution. …

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Method For Determining The Dielectric Constant Of Particles, Vladimir Petrovsky, Fatih Dogan

Materials Science and Engineering Faculty Research & Creative Works

A method of measuring the dielectric constant of a powder, including selecting a powder having an unknown first dielectric constant, selecting a liquid having a known second dielectric constant, and introducing a predetermined amount of powder into a predetermined volume of liquid to define a slurry characterized by a known volume fraction of powder. Next, the impedance spectra of the slurry are plotted over a predetermined frequency range, the measured dielectric constant data is read and the appropriate equivalent circuit for the slurry is determined. Appropriate equivalent circuit equations are applied to the measured dielectric constant data, and the first …

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Determining Optimal Storage Arrangements For Open Access Data Sets, As For Nsf Data Management Plan Requirements, David B. Lowe

Published Works

Document is a proposed draft of a decision tree to be used in determining what approach to take for making data available in order to comply with open access requirements for data management, as per National Science Foundation requirements.

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Foundations For Dynamic Loads, Vijay K. Puri, Shamsher Prakash

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Design of foundations in earthquake prone areas needs special considerations. Shallow foundations may experience a reduction in bearing capacity and increase in settlement and tilt due to seismic loading. the reduction in bearing capacity depends on the nature and type of soil and ground acceleration parameters. in the case of piles, the soil-pile behavior under earthquake loading is generally nonlinear. the nonlinearity must be accounted for by defining soil-pile stiffness in terms of strain dependent soil modulus. a comparison of observed and predicted pile behavior under dynamic loads has attracted the attention of several investigators. the lateral dynamic pile response …

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Effects Of Variable Solar Irradiance On The Reactive Power Compensation For Large Solar Farm, Dustin F. Howard, Ronald G. Harley, Jiaqi Liang, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

Dish-Stirling systems are a form of concentrating solar power (CSP) emerging as an efficient and reliable source of renewable energy. Various technical hurdles are involved in the grid interconnection of dish-Stirling systems, particularly with issues related to power factor correction, low voltage ride-through capability, and reactive power planning. While there are no grid-interconnection requirements specific to dish-Stirling technology, the requirements currently established for wind farms are used as a starting point due to the similar design and operating characteristics between wind farms and dish-Stirling solar farms. a dish-Stirling solar farm requires external reactive power compensation to meet the power factor …

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Estimation Of Voltage Stability Index In A Power System With Plug-In Electric Vehicles, K. Joseph Makasa, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

A Multilayer Perceptron (MLP) neural network-based approach for estimation of the voltage stability L-index in a power system with Plug-in Electric Vehicles (PEVs) is presented. This technique overcomes the limitations of direct calculation of L-index from measurements at a load bus. the L-index calculation is dependent upon the no-load voltage phasor for any given system topology and operating condition. in practice it is difficult to obtain no-load voltage phasor at a bus each time the system topology or operating point changes. an MLP neural network-based method capable of estimating voltage stability L-index at a load bus using direct measurements and …

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Increasing Parameter Certainty And Data Utility Through Multi-Objective Calibration Of A Spatially Distributed Temperature And Solute Model, Christina J. Bandaragoda, Bethany T. Neilson

Civil and Environmental Engineering Faculty Publications

To support the goal of distributed hydrologic and instream model predictions based on physical processes, we explore multi-dimensional parameterization determined by a broad set of observations. We present a systematic approach to using various data types at spatially distributed locations to decrease parameter bounds sampled within calibration algorithms that ultimately provide information regarding the extent of individual processes represented within the model structure. Through the use of a simulation matrix, parameter sets are first locally optimized by fitting the respective data at one or two locations and then the best results are selected to resolve which parameter sets perform best …

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Strong (X)Html Compliance With Haskell's Flexible Type System, Paul G. Talaga, Steve J. Chapin

Electrical Engineering and Computer Science - All Scholarship

We report on the embedding of a domain specific language, (X)HTML, into Haskell and demonstrate how this superficial non-context-free language can be represented and rendered to guarantee World Wide Web Consortium (W3C) compliance. Compliance of web content is important for the health of the Internet, accessibility, visibility, and reliable search. While tools exist to verify web content is compliant according to the W3C, few systems guarantee that all produced content is compliant. We present CH-(X)HTML, a library for generating compliant (X)HTML content by using Haskell to encode the nontrivial syntax of (X)HTML set forth by the W3C. Any compliant document …

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Design And Fabrication Of A Membrane Integrated Microfluidic Cell Culture Device Suitable For High-Resolution Imaging, Alla A. Epshteyn

USF Tampa Graduate Theses and Dissertations

Malaria remains a serious concern for people living and traveling to warm climates in Africa, Asia, and some parts of America. Understanding the mechanism of the malaria parasite in the liver phase could lead to important discoveries for preventative and treatment therapeutics before the disease develops into the blood stage. While in vitro liver cell culture models have been explored, a device that mimics the liver cell architecture with the capability of high-resolution imaging has never been created. In this research, a cell culture microfluidic device was designed and fabricated with a membrane integrated design to mimic the architecture of …

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Continuous Electrowetting Actuation Utilizing Current Rectification Properties Of Valve Metal Films, Corey M. Lynch

USF Tampa Graduate Theses and Dissertations

Electrowetting on dielectric (EWOD) is a technique for reducing the apparent contact angle of a fluid droplet, which has many promising applications in the fields of optics, digital displays, and lab-on-a-chip research. In this thesis, a design is presented for a novel single circuit device for achieving continuous droplet motion, by using the current-rectifying properties of valve metals to create diode-like behavior. This contrasts with existing designs, which require an array of individual electrodes to achieve motion in discrete steps. We are able to demonstrate continuous droplet motion across a 28mm-long test strip with an applied voltage of 303 V …

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Labyrinthine Instability In Thin Liquid Films, P. Neogi

Chemical and Biochemical Engineering Faculty Research & Creative Works

When a thin liquid film on a solid surface has a thickness corresponding to a particular part the spinodal region of the disjoining pressure versus thickness isotherm, the film breaks down. One of the patterns that emerges on the breakdown has been referred to as wavy instability. It is compared here to the labyrinthine instability seen in magnetic films. the system is modeled following the procedure used in magnetic systems, and the pattern of wavy instability is broken down into a curved thick-thin film in equilibrium with a flat thin-thin film of constant thickness. Minimization of free energy leads to …

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Individual Muscle Contributions To The Axial Knee Joint Contact Force During Normal Walking, Kotaro Sasaki, Richard R. Neptune

Mechanical and Biomedical Engineering Faculty Publications and Presentations

Muscles are significant contributors to the high joint forces developed in the knee during human walking. Not only do muscles contribute to the knee joint forces by acting to compress the joint, but they also develop joint forces indirectly through their contributions to the ground reaction forces via dynamic coupling. Thus, muscles can have significant contributions to forces at joints they do not span. However, few studies have investigated how the major lower-limb muscles contribute to the knee joint contact forces during walking. The goal of this study was to use a muscle-actuated forward dynamics simulation of walking to identify …

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Virtual Blasting System For Removal Of Coating And/Or Rust From A Virtual Surface, Michael Bolick, Chris Lampe, Jason Ebensberger, Jeremiah Treloar, Rick Klein, Eric Conrad Peterson, Chad Jason Zalkin

Patents (University of Northern Iowa)

A computer simulation and virtual reality system simulates the use of a blasting nozzle to remove one or more coatings and/or rust from a virtual surface. The user operates an electronic controller in the form of a blasting nozzle that outputs a signal indicating whether the blasting nozzle controller is in an "on" position or in an "off" position. The system also has a motion tracking system that tracks the position and orientation of the blasting nozzle controller with respect to the virtual surface defined on the display screen. Simulation software in a computer generates virtual blast pattern data, and …

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Concurrent Muscoskeletal Dynamics And Finite Element Analysis Predicts Altered Gait Patterns To Reduce Foot Tissue Loading, Jason P. Halloran, Marko Ackermann, Antonie J. Van Den Bogert

Mechanical Engineering Faculty Publications

Current computational methods for simulating locomotion have primarily used muscle-driven multibody dynamics, in which neuromuscular control is optimized. Such simulations generally represent joints and soft tissue as simple kinematic or elastic elements for computational efficiency. These assumptions limit application in studies such as ligament injury or osteoarthritis, where local tissue loading must be predicted. Conversely, tissue can be simulated using the finite element method with assumed or measured boundary conditions, but this does not represent the effects of whole body dynamics and neuromuscular control. Coupling the two domains would overcome these limitations and allow prediction of movement strategies guided by …

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A Framework Based On Gaussian Mixture Models And Kalman Filters For The Segmentation And Tracking Of Anomalous Events In Shipboard Video, Ben Wenger

Theses and Dissertations

Anomalous indications in monitoring equipment on board U.S. Navy vessels must be handled in a timely manner to prevent catastrophic system failure. The development of sensor data analysis techniques to assist a ship's crew in monitoring machinery and summon required ship-to-shore assistance is of considerable benefit to the Navy. In addition, the Navy has a large interest in the development of distance support technology in its ongoing efforts to reduce manning on ships. In this thesis, algorithms have been developed for the detection of anomalous events that can be identified from the analysis of monochromatic stationary ship surveillance video streams. …

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High-Pressure And High-Temperature Density Measurements Of N-Pentane, N-Octane, 2,2,4-Trimethylpentane, Cyclooctane, N-Decane, And Toluene, Yue Wu

Theses and Dissertations

Information on the density of hydrocarbons at high pressures and temperatures is of great importance in many fields, such as the study of ultra-deep reservoirs up to ~240 MPa and 250°C. However, density data at such high pressures and temperatures are often not available in the literature. In this study, experimental densities are reported for n-pentane, n-octane, 2,2,4-trimethylpentane, cyclooctane, n-decane, and toluene to ~280 MPa and ~250°C. These experimental densities are in good agreement with available literature data, although the literature data for many of these fluids do not extend to the pressures and temperatures utilized in this study.

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The Green And Ampt Infiltration Model Accounting For Air Compression And Air Counterflow In The Shallow Water Table Environment: Laboratory Experiments, Yuliya Lukyanets

USF Tampa Graduate Theses and Dissertations

Water infiltration into the unsaturated zone especially in a shallow water table environment is affected by air compression ahead of the wetting front and air counterflow. Neglecting air compression in infiltration modeling can overestimate infiltration and infiltration rates, whereas not accounting for air counterflow can underestimate infiltration and infiltration rates due to unrealistic buildup of air pressure resistance ahead of the wetting front. A method, derived on the basis of the Green and Ampt (1911) infiltration model, is introduced to simulate air compression and air counterflow during infiltration into a shallow water table. The method retains the simplicity of the …

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Optofluidic Biosensors Based On Color Imaging, Jongwon Park, Chang-Soo Kim

Electrical and Computer Engineering Faculty Research & Creative Works

A color CCD (charge-coupled device) camera is used as a chemical detector to quantify fluorescence emission intensities from two kinds of optofluidic device platforms. the fluorophores responsive to oxygen are immobilized in photo-patternable hydrogel matrices. the first device is a hydrogel sensor array formed within a commercial silicone elastomer imaging chamber. the second one involves a double-chamber fluidic device composed of a permeable membrane layer and dry film photoresist layers. the results suggest that digital color imagers, in combination with a simple color separation method, can serve as the high-quality chemical detectors for fluidic biosensors and biological culture platforms. © …

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Experimental Study Of Silver Nanofluid On Flat Heat Pipe Thermal Performance, Yu-Tang Chen

Journal of Marine Science and Technology–Taiwan

This study utilizes silver nano-fluid filled flat heat pipe. It is aimed at effect of various concentrations on flat heat pipe thermal performance by air-cooling testing equipment. The particles used in these experiments were silver particles 35 nm in size. The base working fluid was pure-water. Nano-fluids were prepared using a two-step method. In the experiment, the thickness and length of the heat pipe are 3 mm and 200 cm, respectively. An experimental system was set up to measure the temperature distribution of heat pipes and calculate the thermal resistance by equation R = ∆T/Q. At a same charge volume, …

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Corrosion Behaviour Of Brass In The Vembanad Estuary, India, Andy Mathiazhagan, Rani Joseph, Kanjiramparayil Puthilon Narayanan, Palaniandy Seralathan

Journal of Marine Science and Technology–Taiwan

Corrosion characteristics of brass panels were investigated in the Vembanad estuarine water (Cochin Harbor), India over a period of one year. The corrosion rate of brass samples during exposure was determined by gravimetric method and fouling on panels was assessed, exposure-wise, in terms of biomass. Corrosion products were identified by X-Ray diffraction. The results of the study were discussed in the light of the seawater characteristics.

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Optimal Estimation For Key Parameters Of The Marine Quality Model Using Data-Driven Neural Network, Ming-Chang Li, Shu-Xiu Liang, Zhao-Chen Sun, Guang-Yu Zhang

Journal of Marine Science and Technology–Taiwan

Marine water quality models are complicated because of their multi-parameter and multi-response characteristics. One major difficulty with water quality models is the accurate estimation of model parameters. In this paper, a new method based on a data-driven model (DDM) is developed to retrieve the value of model parameters. All training data are calculated by numerical water quality models from results of multiparameter matching design cases so the physical properties are not disturbed. The concept is to find the relationship between model parameters and the pollution concentration values of interior stations. Field data are imported into the relationship for inversing optimal …

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How A Systems Engineer Starts..., Herman Migliore

Systems Science Friday Noon Seminar Series

Dr. Migliore will review systems engineering as a process for developing products, processes, and services and suggest views that encourage systems thinking. As an example, he will focus on the beginning of the development process, the fuzzy front end, and discuss a method, ConOps, for getting started using examples from PSU's masters program.

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Maintenance Algorithm And Management System Of Sidewalk Facility, Lee-Kuo Lin, Chen-You Jian

Journal of Marine Science and Technology–Taiwan

Sidewalk is one kind of infrastructure systems in each city, because every sidewalk facility is used by pedestrians, so the maintenance algorithm should be evaluated and worked with users’ role. To echo this reasonable concept, this research investigates several using influence factors, which were collected and evaluated from pedestrians. For statistical analysis, scientific tools including Delphi method, analytic hierarchy process (AHP), and fuzzy theory were used to analyze and establish a preliminary evaluation model of sidewalk maintenance system. In order to use this model pragmatically, this research also establishes a portable prototype system at PDA hardware. With this portable system, …

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Hamilton Decomposition Of Complete Bipartite 3-Uniform Hypergraphs, Jirimutu Jirimutu, Jul Wang

Journal of Marine Science and Technology–Taiwan

The problem of finding a Hamilton decomposition of the complete 3-uniform hypergraph 3 Kn has been solved for n ≡ 2(mod 3), n ≡ 4(mod 6) [2], n ≡ 1(mod 6), n ≡ 0(mod 3) (for 3 , K I n − the complete 3-uniform hypergraph minus a 1- factor) [5]. In this paper, we give the concept of the bipartite hypergraphs and find a Hamilton decomposition of the complete bipartite hypergraph 3 Km,m for m be prime.

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Full-Text Articles in Engineering

Design And Fabrication Of A 1/3 Scale Gemini-Style Capsule, Toshawnka Walker, Jonathan Davis, Brockton Thompson, Ryohsuke Aoki

Von Braun Symposium Student Posters

Poias Philoctetes/Okyrhoe Integrated Asteroid Surveyor, Ian Maddox

Von Braun Symposium Student Posters

Ahhhhhhh! Earthquake!, Jarred Green, Eugene Lasarge, Brittany Marcott, Maigan Matthias, Matthew Watts

Von Braun Symposium Student Posters

Formula Sae Preliminary Aerodynamic Design, Robert Coates, Matt Wright

Von Braun Symposium Student Posters

Noegenetic Io Monitoring Observernimo, William Daniels

Von Braun Symposium Student Posters

Work In Progress - Role Of Faculty In Promoting Lifelong Learning: Initial Findings, John Chen, Susan M. Lord, Katharyn Nottis, Michael Prince, Candice Stefanou, Jonathon Stolk

Mechanical Engineering

Understanding The Interaction Between Blood Flow And An Applied Magnetic Field, Francy L. Sinatra

USF Tampa Graduate Theses and Dissertations

Method For Determining The Dielectric Constant Of Particles, Vladimir Petrovsky, Fatih Dogan

Materials Science and Engineering Faculty Research & Creative Works

Determining Optimal Storage Arrangements For Open Access Data Sets, As For Nsf Data Management Plan Requirements, David B. Lowe

Published Works

Foundations For Dynamic Loads, Vijay K. Puri, Shamsher Prakash

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Effects Of Variable Solar Irradiance On The Reactive Power Compensation For Large Solar Farm, Dustin F. Howard, Ronald G. Harley, Jiaqi Liang, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

Estimation Of Voltage Stability Index In A Power System With Plug-In Electric Vehicles, K. Joseph Makasa, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

Increasing Parameter Certainty And Data Utility Through Multi-Objective Calibration Of A Spatially Distributed Temperature And Solute Model, Christina J. Bandaragoda, Bethany T. Neilson

Civil and Environmental Engineering Faculty Publications

Strong (X)Html Compliance With Haskell's Flexible Type System, Paul G. Talaga, Steve J. Chapin

Electrical Engineering and Computer Science - All Scholarship

Design And Fabrication Of A Membrane Integrated Microfluidic Cell Culture Device Suitable For High-Resolution Imaging, Alla A. Epshteyn

USF Tampa Graduate Theses and Dissertations

Continuous Electrowetting Actuation Utilizing Current Rectification Properties Of Valve Metal Films, Corey M. Lynch

USF Tampa Graduate Theses and Dissertations

Labyrinthine Instability In Thin Liquid Films, P. Neogi

Chemical and Biochemical Engineering Faculty Research & Creative Works

Individual Muscle Contributions To The Axial Knee Joint Contact Force During Normal Walking, Kotaro Sasaki, Richard R. Neptune

Mechanical and Biomedical Engineering Faculty Publications and Presentations

Virtual Blasting System For Removal Of Coating And/Or Rust From A Virtual Surface, Michael Bolick, Chris Lampe, Jason Ebensberger, Jeremiah Treloar, Rick Klein, Eric Conrad Peterson, Chad Jason Zalkin

Patents (University of Northern Iowa)

Concurrent Muscoskeletal Dynamics And Finite Element Analysis Predicts Altered Gait Patterns To Reduce Foot Tissue Loading, Jason P. Halloran, Marko Ackermann, Antonie J. Van Den Bogert

Mechanical Engineering Faculty Publications

A Framework Based On Gaussian Mixture Models And Kalman Filters For The Segmentation And Tracking Of Anomalous Events In Shipboard Video, Ben Wenger

Theses and Dissertations

High-Pressure And High-Temperature Density Measurements Of N-Pentane, N-Octane, 2,2,4-Trimethylpentane, Cyclooctane, N-Decane, And Toluene, Yue Wu

Theses and Dissertations

The Green And Ampt Infiltration Model Accounting For Air Compression And Air Counterflow In The Shallow Water Table Environment: Laboratory Experiments, Yuliya Lukyanets

USF Tampa Graduate Theses and Dissertations

Optofluidic Biosensors Based On Color Imaging, Jongwon Park, Chang-Soo Kim

Electrical and Computer Engineering Faculty Research & Creative Works

Experimental Study Of Silver Nanofluid On Flat Heat Pipe Thermal Performance, Yu-Tang Chen

Journal of Marine Science and Technology–Taiwan

Corrosion Behaviour Of Brass In The Vembanad Estuary, India, Andy Mathiazhagan, Rani Joseph, Kanjiramparayil Puthilon Narayanan, Palaniandy Seralathan

Journal of Marine Science and Technology–Taiwan

Optimal Estimation For Key Parameters Of The Marine Quality Model Using Data-Driven Neural Network, Ming-Chang Li, Shu-Xiu Liang, Zhao-Chen Sun, Guang-Yu Zhang

Journal of Marine Science and Technology–Taiwan

How A Systems Engineer Starts..., Herman Migliore

Systems Science Friday Noon Seminar Series

Maintenance Algorithm And Management System Of Sidewalk Facility, Lee-Kuo Lin, Chen-You Jian

Journal of Marine Science and Technology–Taiwan

Hamilton Decomposition Of Complete Bipartite 3-Uniform Hypergraphs, Jirimutu Jirimutu, Jul Wang

Journal of Marine Science and Technology–Taiwan