Ocean Renewable Power Company, 2017 Ocean Renewable Power Company
Ocean Renewable Power Company, James Donegan
No abstract provided.
Design Of Radio-Frequency Arrays For Ultra-High Field Mri, 2017 The University of Western Ontario
Design Of Radio-Frequency Arrays For Ultra-High Field Mri, Ian R O Connell
Electronic Thesis and Dissertation Repository
Magnetic Resonance Imaging (MRI) is an indispensable, non-invasive diagnostic tool for the assessment of disease and function. As an investigational device, MRI has found routine use in both basic science research and medicine for both human and non-human subjects.
Due to the potential increase in spatial resolution, signal-to-noise ratio (SNR), and the ability to exploit novel tissue contrasts, the main magnetic field strength of human MRI scanners has steadily increased since inception. Beginning in the early 1980’s, 0.15 T human MRI scanners have steadily risen in main magnetic field strength with ultra-high field (UHF) 8 T MRI systems ...
Real-Time Internal Temperature Estimation And Health Monitoring For Igbt Modules, 2017 University of Nebraska - Lincoln
Real-Time Internal Temperature Estimation And Health Monitoring For Igbt Modules, Ze Wang
Theses and Dissertations from Electrical & Computer Engineering
Field experiences have demonstrated that power semiconductor devices, such as insulated-gate bipolar transistors (IGBTs), are among the most fragile components of power electronic converters. Thermomechanical stresses produced by temperature variations during operational and environmental loads are the major causes of IGBT degradation. As the devices are often operated under complex working conditions, temperature variations and the associated damage are difficult to predict during the converter design stage. A promising approach—online health monitoring and prognosis for power semiconductor devices—that can avoid device failure and effectively schedule maintenance has attracted much interest.
This dissertation research focused on real-time accurate internal ...
Accumulator Volume Sensor Final Project Report, 2016 California Polytechnic State University, San Luis Obispo
Accumulator Volume Sensor Final Project Report, Chris Naughton, Kinwei Yu, Michael George
Accumulator Volume Sensing Team has developed two sensor designs aimed at detecting the position of the piston within a 4024 accumulator. The two designs include the use of a Renishaw LMA10 magnetic encoder and a SpectraSymbol HotPot linear potentiometer. The magnetic encoder solution drastically increases the accuracy of sensing the piston position compared to the current solutions of both a string-pot and linear variable differential transformer while costing slightly less. The linear potentiometer seeks to provide a solution that drastically decreases the cost compared to the present sensing methods. Both designs call for a modification to one half of the ...
Design And Analysis Of A Fully-Integrated Resonant Gate Driver, 2016 University of Tennessee, Knoxville
Design And Analysis Of A Fully-Integrated Resonant Gate Driver, Yu Long
Several decades ago the resonant gate driving technique was proposed. Given the recent rapid growth in GaN HEMT power device applications for high-frequency power applications, research has been conducted in the power electronics field using resonant gate driving for GaN power devices. Previous research for resonant gate drivers for GaN HEMT devices mostly focused on implementing the gate driving function itself, and mostly for normally-on HEMT devices.
The normally-off (enhancement mode) GaN power device was introduced to the commercial market in 2009. A new resonate gate driver is proposed in this work to implement resonant gate driving for commercial high-speed ...
Psychophysiological Analysis Of A Pedagogical Agent And Robotic Peer For Individuals With Autism Spectrum Disorders., 2016 University of Louisville
Psychophysiological Analysis Of A Pedagogical Agent And Robotic Peer For Individuals With Autism Spectrum Disorders., Mohammad Nasser Saadatzi
Electronic Theses and Dissertations
Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by ongoing problems in social interaction and communication, and engagement in repetitive behaviors. According to Centers for Disease Control and Prevention, an estimated 1 in 68 children in the United States has ASD. Mounting evidence shows that many of these individuals display an interest in social interaction with computers and robots and, in general, feel comfortable spending time in such environments. It is known that the subtlety and unpredictability of people’s social behavior are intimidating and confusing for many individuals with ASD. Computerized learning environments and robots, however, prepare a ...
Electric Smart Load Meter, 2016 California Polytechnic State University, San Luis Obispo
Electric Smart Load Meter, Johnny Tran
This project details the design of an electric meter that reads the signals of any device plugged into an outlet and displays cost readings that may potentially reduce power consumption. The sensor monitors whether a plugged in device continuously consumes power after completely charging up. For a charging device, the current remains constant until the device reaches 100% charge. Once the device becomes fully charged, the current discontinues for proper power usage. A unique aspect of the meter is that it displays cost per hour, day, and year. Displaying the cost per unit of time creates awareness for customers, potentially ...
Active Contact Lens - Low Power Backscattering Sensor-To-Antenna Integration Circuitry, 2016 California Polytechnic State University, San Luis Obispo
Active Contact Lens - Low Power Backscattering Sensor-To-Antenna Integration Circuitry, Caleb B. Porter
The Active Contact Lens measures the cornea-scleral radius of the wearer’s eye, which correlates to intraocular pressure (IOP), Glaucoma’s primary indicator. IOP varies throughout the day, and is drastically different from person to person, so constantly measuring it over a period of a few days can provide individualized tracking of the disease’s development and will help doctors develop personalized treatment schedules to treat the disease more precisely.
The Active Contact Lens sensor measures strain, based on the cornea-scleral radius, and reports the results wirelessly, to allow monitoring of an individual’s IOP over time. The lens is ...
Final Design Report: Grasp Data Acquisition Project Axon Vr, 2016 California Polytechnic State University, San Luis Obispo
Final Design Report: Grasp Data Acquisition Project Axon Vr, Michael Erberich, Jack Schultz, Tyler Yeaman
No abstract provided.
Cmos Based Impedance Sensing, 2016 University of Tennessee, Knoxville
Cmos Based Impedance Sensing, Jinlong Gu
This thesis focuses on a compact, low power circuit design for biological cell impedance sensing. Cell impedance sensing provides a new way to diagnose the cancers. Experiments done previously have shown that cancer cells have lower impedance than the normal cells, due to the thinner membrane of cancer cells. Traditional methods of cancer diagnosis require special chemicals, skilled personnel, and take long time to obtain the results. Two circuit structures are proposed in this work. One is a silicon cochlea based architecture. The other one is a current mode lock-in amplifier. Both of these two structures are able to measure ...
Ac Power Monitoring System, 2016 Cedarville University
Ac Power Monitoring System, Jared L. Newman, Luke M. Tomlinson, Grayson H. Dearing
Channels: Where Disciplines Meet
Motivated by high energy costs, people and organizations want to cut back on their energy consumption. However, the only feedback consumers typically receive is a monthly bill listing their total electricity usage (in kWh). Some companies have begun developing systems that allow households and organizations to monitor their energy usage for individual circuits. Available systems are expensive so a CU engineering senior design team has designed, fabricated, and tested a system for use at Cedarville University. The AC power monitoring system has the ability to measure energy consumption for each individual circuit in the breaker panel, store the data, and ...
Measurement And Analysis Of Iii-V & Ii-Vi Infrared Detectors: Radiometric, Noise Spectrum, And Radiation Tolerance Performance, Vincent M. Cowan
Nanoscience and Microsystems ETDs
Infrared (IR) hybrid detector arrays and discrete detectors operated in the space environment may be subjected to a variety of sources of natural radiation while in orbit. This means IR detectors intended for applications such as space-based intelligence, surveillance, and reconnaissance (ISR) or space-situational awareness (SSA) must not only have high performance (high quantum efficiency, h and low dark-current density, JD, and preferably minimal 1/f noise content), but also their radiation tolerance or ability to withstand the effects of the radiation they would expect to encounter in space must be characterized and well understood. As the effects of ...
Presentation : A Fractal-Based Dual-Mode Microstrip Bandstop Filter For Wireless Applications, 2016 University of Technology
Presentation : A Fractal-Based Dual-Mode Microstrip Bandstop Filter For Wireless Applications, Hayder S. Ahmed
Hayder S. Ahmed
Segmentation Of Pulmonary Nodules In Computed Tomography Using A Regression Neural Network Approach And Its Application To The Lung Image Database Consortium And Image Database Resource Initiative Dataset, 2016 University of Dayton
Segmentation Of Pulmonary Nodules In Computed Tomography Using A Regression Neural Network Approach And Its Application To The Lung Image Database Consortium And Image Database Resource Initiative Dataset, Temesguen Messay, Russell C. Hardie, Timothy R. Tuinstra
Timothy R Tuinstra, Ph.D.
We present new pulmonary nodule segmentation algorithms for computed tomography (CT). These include a fully-automated (FA) system, a semi-automated (SA) system, and a hybrid system. Like most traditional systems, the new FA system requires only a single user-supplied cue point. On the other hand, the SA system represents a new algorithm class requiring 8 user-supplied control points. This does increase the burden on the user, but we show that the resulting system is highly robust and can handle a variety of challenging cases. The proposed hybrid system starts with the FA system. If improved segmentation results are needed, the SA ...
Reconstruction Of In-Plane Strain Maps Using Hybrid Dense Sensor Network Composed Of Sensing Skin, 2016 Iowa State University
Reconstruction Of In-Plane Strain Maps Using Hybrid Dense Sensor Network Composed Of Sensing Skin, Austin R.J. Downey, Simon Laflamme, Filippo Ubertini
Civil, Construction and Environmental Engineering Publications
The authors have recently developed a soft-elastomeric capacitive (SEC)-based thin film sensor for monitoring strain on mesosurfaces. Arranged in a network configuration, the sensing system is analogous to a biological skin, where local strain can be monitored over a global area. Under plane stress conditions, the sensor output contains the additive measurement of the two principal strain components over the monitored surface. In applications where the evaluation of strain maps is useful, in structural health monitoring for instance, such signal must be decomposed into linear strain components along orthogonal directions. Previous work has led to an algorithm that enabled ...
Negative Index In Chiral Metamaterials Under Conductive Loss And First-Order Material Dispersion Using Lorentzian, Condon And Drude Models, Monish Ranjan Chatterjee, Tarig A. Algadey
Electrical and Computer Engineering Faculty Publications
Emergence of negative index (NIM) in chiral materials with conductive loss using standard dispersive models is reported. Positive and negative phase and group indices are realized as expected for NIM behavior for sidebands with opposite polarities.
Deposition Control For Electrospun Fibers, 2016 Montana Tech
Deposition Control For Electrospun Fibers, Joshua Beisel
Graduate Theses & Non-Theses
Electrospinning (ES) is a process for fabricating polymer fibers that have diameters that range from tens of nanons to hundreds of microns, which has been studied for over 100 years. These fibers have been studied in applications such as: the enhancement of mechanical properties including increased sensor sensitivity and increased tensile strength, filtration enhancement, drug delivery systems, and as a lithography masking material. In order to increase the effectiveness of ES, a real time feedback control mechanism to measure fiber diameters is needed. Currently only post-process methods of measuring fiber morphology, such as scanning electron microscopy or transmission electron microscopy ...
Analysis Of Interference Between Electromagnetic Articulography And Electroglottograph Systems, 2016 Marquette University
Analysis Of Interference Between Electromagnetic Articulography And Electroglottograph Systems, Kelly Vonderhaar
Master's Theses (2009 -)
Electromagnetic Articulography (EMA) has become an integral tool for researchers and clinicians who seek to characterize speech kinematics. The position and orientation of the articulators – which include the jaw, lips, and tongue – are recorded by attaching sensors to the articulators and tracking the movement of the sensors through an electromagnetic field. This has been used by researchers and clinicians to better understand dysarthria and synthesize speech, among other applications. Another speech tool, electroglottography (EGG), is used to analyze the movement of the vocal folds during speech production. This is achieved by measuring the time variation of the contact of the ...
Optimization Of The Bowtie Gap Geometry For A Maximum Electric Field Enhancement, 2016 Marquette University
Optimization Of The Bowtie Gap Geometry For A Maximum Electric Field Enhancement, Tsenguun Byambadorj
Master's Theses (2009 -)
Optimization of the geometry of a metallic bowtie gap at radio frequency is presented in this thesis. Since the design and fabrication of a plasmonic device (nanogap) at nanoscale is challenging, the results of this study can be used to estimate the best design parameters for nanogap structure. The geometry of the bowtie gap including gap size, tip width, metal thickness, and tip angle are investigated at macroscale to find the maximum electric field enhancement across the gap. This thesis focuses on the simulation portion of a work that consists of experimental and simulation platforms. The simulation platform is created ...
Mechanical Design And Optimization Of An Interactive Animatronic Bald Eagle, 2016 Georgia Southern University
Mechanical Design And Optimization Of An Interactive Animatronic Bald Eagle, Eric Burns
Phi Kappa Phi Research Symposium
Animatronics is a specialized sub-category of mechatronics, a fusion of mechanical and electrical engineering. The field has grown from small, individual projects into a major industry. As animatronics progress, mechanical engineers are pushed to design internal structures which occupy ever-decreasing spaces and to ensure designs can undergo maintenance and modifications smoothly. This research investigates methods of reducing space required for mechanisms and several other beneficial methods of development as well as varying satisfactions for audiences when exposed to actor-controlled systems rather than pre-scripted functions. The mechanical systems are designed using CAD software available at Georgia Southern. On-campus, resources are used ...