Electrical and Computer Engineering Commons^™

M-Ary Energy Detection Of A Gaussian Fsk Uwb System, Song Cui, Fuqin Xiong

Electrical and Computer Engineering Faculty Publications

The energy detection M-ary Gaussian frequency-shift keying (FSK) system is proposed in this paper. The system performance is analyzed in additive white Gaussian noise channels, multipath channels, and in the presence of synchronization errors. The numerical results show that the M-ary modulation achieves the higher data rate than the binary modulation. However, it also results in performance degradation.

Midrange Magnetically-Coupled Resonant Circuit Wireless Power Transfer, Varun Nagoorkar

Electrical Engineering Theses

Recent years have seen numerous efforts to make wireless power transfer (WPT) feasible for application in diverse fields, from low-power domestic applications and medical applications to high-power industrial applications and electrical vehicles (EVs). As a result, it has been found that WPT by means of non-radiative magnetically-coupled resonant circuits is an optimum method for mid-range applications where the separation of source and receiver is in the range of 1-2m.This thesis investigates various aspects of the design of magnetically-coupled resonant circuits for non-radiative WPT. Firstly, a basic four-coil network for a mid-range (1-2m gap) WPT system with a single power source …

Using Near-Field Coupled Circularly Polarized Antennas As Frequency Independent Variable Phase-Shifters, Vit Sipal, Adam Narbudowicz, Max Ammann

Articles

This paper introduces a novel concept of frequency-independent variable phase-shifters. It is based on the use of circularly polarized (CP) antennas coupled in the near-field. For transmission between two CP antennas in the far-field, a rotation around the boresight axis produces a phase change in the transfer function. This concept is exploited and validated also for near-field coupling between two CP antennas. Therefore, two close-coupled CP antennas can act as a adjustable phase-shifter with the phase-shift controlled by the angle between the structures. The bandwidth depends on the CP bandwidth of the antenna. This concept is valuable for future phase-shifters …

Energy-Efficient Stdp-Based Learning Circuits With Memristor Synapses, Xinyu Wu, Vishal Saxena, Kristy A. Campbell

Electrical and Computer Engineering Faculty Publications and Presentations

It is now accepted that the traditional von Neumann architecture, with processor and memory separation, is ill suited to process parallel data streams which a mammalian brain can efficiently handle. Moreover, researchers now envision computing architectures which enable cognitive processing of massive amounts of data by identifying spatio-temporal relationships in real-time and solving complex pattern recognition problems. Memristor cross-point arrays, integrated with standard CMOS technology, are expected to result in massively parallel and low-power Neuromorphic computing architectures. Recently, significant progress has been made in spiking neural networks (SNN) which emulate data processing in the cortical brain. These architectures comprise of …

Processing Of Monolayer Materals Vlanterfacial Reactions, Peter Werner Sutter, Eli Anguelova Sutter

Department of Electrical and Computer Engineering: Faculty Publications

A method of forming and processing of graphene is disclosed based on exposure and selective intercalation of the partially graphene-covered metal Substrate with atomic or molecular intercalation species such as oxygen (O) and nitrogen oxide (NO). The process of intercalation lifts the strong metal carbon coupling and restores the characteristic Dirac behav ior of isolated monolayer graphene. The interface of graphene with metals or metal-decorated substrates also provides for controlled chemical reactions based on novel functionality of the confined space between a metal Surface and a graphene sheet.

A Systematic Security Evaluation Of Android’S Multi-User Framework, Edward Paul Ratazzi, Yousra Aafer, Amit Ahlawat, Hao Hao, Yifei Wang, Wenliang Du

Electrical Engineering and Computer Science - All Scholarship

Like many desktop operating systems in the 1990s, Android is now in the process of including support for multiuser scenarios. Because these scenarios introduce new threats to the system, we should have an understanding of how well the system design addresses them. Since the security implications of multi-user support are truly pervasive, we developed a systematic approach to studying the system and identifying problems. Unlike other approaches that focus on specific attacks or threat models, ours systematically identifies critical places where access controls are not present or do not properly identify the subject and object of a decision. Finding these …

Scada Test Bed - Water Tank System, Allison Linn

Mahurin Honors College Capstone Experience/Thesis Projects

A SCADA, or Supervisory Control And Data Acquisition, system is a computer-controlled system that monitors and controls industrial processes remotely. Electric grids, water supplies, and pipelines are all significant SCADA systems. These systems can be controlled and monitored remotely and are typically composed of multiple programmable logic controllers (PLCs). However, SCADA systems are inherently vulnerable to cyber attacks.

During the previous academic year, an electrical engineering senior project team was assigned the task of designing and constructing a SCADA test bed for WKU’s Engineering-Manufacturing-Commercialization Center (EMCC). The test bed was to have three systems simulating SCADA systems: a traffic light …

Design And Prototyping Of An Antenna-Coupled Cryotron, Shauna Jensen

Dissertations and Theses

Grid-scale integration of renewable energy sources and smart grid devices has created new demands in flexible power conversion. State-of-the-art semiconductor power switches present limitations in power handling capability, as well as forward and reverse breakdown voltages. Superconducting materials are a viable alternative due to their robustness against high ampacities, large electric fields and abrupt changes in power flow. This work pays focus to material testing and apparatus design for an antenna-coupled cryotron (ACC), which is a superconducting power switch.
Design, fabrication and testing are examined for a longitudinal resonant cavity, paired with monopole transmit and modified slot receive antennae. These …

Non-Linear Electromechanical System Dynamics, Shathiyakkumar Ganapathy Annadurai

LSU New Orleans Theses and Dissertations

Electromechanical systems dynamics analysis is approached through nonlinear differential equations and further creating a state space model for the system. There are three modules analyzed and validated, first module consists two magnet coupled with a mass spring damper system as a band-pass system, Low-pass equivalent system and Low-pass equivalent system through perturbation analysis. Initially Band Pass frameworks for the systems are formulated considering the relation between the mechanical forcing and current. Using Mathematical tools such as Hilbert transforms, Low-Pass equivalent of the systems are derived. The state equations of the systems are then used to design a working model in …

Analysis Of Fault Location Methods On Transmission Lines, Sushma Ghimire

LSU New Orleans Theses and Dissertations

Analysis of different types of fault is an important and complex task in a power system. Accurate fault analysis requires models that determine fault distances in a transmission line. The mathematical models accurately capture behavior of different types of faults and location in a timely manner, and prevents damaging power system from fault energy. The purpose of this thesis is to use two methods for determining fault locations and their distance to the reference end buses connected by the faulted transmission line. The two methods used in this investigation are referred to as impedance-based and traveling wave methods. To analyze …

Identifying Humans By The Shape Of Their Heartbeats And Materials By Their X-Ray Scattering Profiles, Ikenna C. Odinaka

McKelvey School of Engineering Graduate Student Theses & Dissertations

Security needs at access control points presents itself in the form of human identification and/or material identification. The field of Biometrics deals with the problem of identifying individuals based on the signal measured from them. One approach to material identification involves matching their x-ray scattering profiles with a database of known materials.

Classical biometric traits such as fingerprints, facial images, speech, iris and retinal scans are plagued by potential circumvention they could be copied and later used by an impostor. To address this problem, other bodily traits such as the electrical signal acquired from the brain (electroencephalogram) or the heart …

A Study Of Sampling Strategies For Helical Ct, Daheng Li

McKelvey School of Engineering Graduate Student Theses & Dissertations

Two classes of subsampling strategies, partially inspired by ideas from compressed sensing (CS), are developed and tested using real medical x-ray CT data acquired with a helical geometry. A version of the Feldkamp algorithm for helical x-ray CT is described. An alternating minimization (AM) algorithm for finding the maximum-likelihood estimates of attenuation functions in transmission X-ray tomography, developed by O’Sullivan and Benac, is then introduced. The derivation of this AM algorithm is extended to include an optional regularization term, which makes it a MAP estimate. A Newton’s method with trust region modification is implemented for the regularization. In addition, the …

Real-Time Image Processing On An Fpga For An Intraoperative Goggle Device, Yiyi Zhang

McKelvey School of Engineering Graduate Student Theses & Dissertations

The emergence of near-infrared dyes for fluorescence imaging has had a tremendous impact in the medical field. In particular, indocyanin green (ICG) has been widely used for assessing tumor margins during intraoperative procedures. Typically, the dye is intravenously injected into the patient, and after 24 hours the dye is removed from the patient’s body, except where binding between the dye and tumor cells has occurred. This selective binding between ICG and cancerous tissue allows for easy and accurate detection of cancer margins as well as detection of metastasis throughout the patient’s body. In order to detect the binding sites, a …

Defect Levels In Cu₂Znsn(Sₓse₁₋ₓ)₄ Solar Cells Probed By Current-Mode Deep Level Transient Spectroscopy, S. Das, S. K. Chaudhuri, R. N. Bhattacharya, K. C. Mandal

Faculty Publications

No abstract provided.

Evaluation Of Methods For Control Of Vegetation In Utility Corridors, George V. Rancea

Master's Projects and Capstones

Vegetation management programs are now one of the largest budget items for most of the utility companies in the United States. Control methods used in line clearance activities include mechanical trimming, planting management, or use of tree growth regulators (chemicals that suppress the production of gibberellins, the plant hormones that control stem elongation). Choosing the appropriate control method is a decision that vegetation program managers should take based on many factors, like costs, environmental impacts, existing agreements with the landowners, terrain, public perception etc. To find a balance between competing interests – a reliable and economic electric system on one …

College Of Engineering Senior Design Competition Spring 2014, University Of Nevada, Las Vegas

Fred and Harriet Cox Senior Design Competition Projects

Part of every UNLV engineering student’s academic experience, the senior design project stimulates engineering innovation and entrepreneurship. Each student in their senior year chooses, plans, designs, and prototypes a product in this required element of the curriculum. A capstone to the student’s educational career, the senior design project encourages the student to use everything learned in the engineering program to create a practical, real world solution to an engineering challenge. The senior design competition helps focus the senior students in increasing the quality and potential for commercial application for their design projects. Judges from local industry evaluate the projects on …

Agent-Based Control Of A Flapping Wing Micro Aerial Vehicle, Michal Podhradský

Student Research Symposium

Flapping wing micro aerial vehicles (FWMAVs) are biomimetic vehicles, because they imitate insects in the way they fly. FWMAVs are very small and highly manoeuvrable and can be used in reconnaissance, environmental monitoring, search & rescue, and other applications. The goal of the project is to develop & verify an agent based flight controller for FWMAV that can adapt to different flight conditions, actuator failures, and different vehicles while delivering constant performance. Agent based control was successfully applied in industry and distributed applications, but to our best knowledge never in an actual flying vehicle. Agent based control utilizes machine learning, …

Ferromagnetic Resonance Study Of Eightfold Artificial Ferromagnetic Quasicrystals, Vinayak Shantaram Bhat, J. Sklenar, J. Woods, B. Farmer, J. B. Ketterson, Jeffrey Todd Hastings, Lance E. De Long

Physics and Astronomy Faculty Publications

We have performed broadband (10 MHz–18 GHz) and narrowband (9.7 GHz) ferromagnetic resonance (FMR) measurements on permalloy thin films patterned with quasiperiodic Ammann tilings having eightfold rotational symmetry. We observed highly reproducible mode structures in the low-frequency, hysteretic regime in which domain walls and unsaturated magnetization textures exist. A minimum of 10 robust modes were observed in patterned samples, compared to the single uniform mode observed in unpatterned permalloy films. The field dependence and approximate eightfold rotational symmetry of the FMR spectra are in good agreement with micromagnetic simulations that confirm the importance of patterning for controlling static and dynamic …

Signal-To-Noise Measurements And Particle Focusing In Liquid-Core Waveguides, Michael A. Olson

Theses and Dissertations

This thesis presents an analysis of the signal-to-noise ratio in liquid core anti-resonant reflecting optical waveguides (ARROWs) and the application of hydrodynamic focusing to the waveguides. These concepts are presented as a method to improve the detection capabilities of the ARROW platform. The improvements are specifically targeted at achieving single molecule detection (SMD) with the devices. To analyze the SNR of the waveguides a test platform was designed and fabricated. This test platform was then used to examine relationship between the SNR and the location of the excitation region. It was determined that the excitation region should be moved closer …

Enhancing Thermal Video Using A Public Database Of Images, Hemin Qadir, Samuel Peter Kozaitis, Ehsan A. Ali

Electrical Engineering and Computer Science Faculty Publications

We presented a system to display nightime imagery with natural colors using a public database of images. We initially combined two spectral bands of images, thermal and visible, to enhance night vision imagery, however the fused image gave an unnatural color appearance. Therefore, a color transfer based on look-up table (LUT) was used to replace the false color appearance with a colormap derived from a daytime reference image obtained from a public database using the GPS coordinates of the vehicle. Because of the computational demand in deriving the colormap from the reference image, we created an additional local database of …

Color Night Vision System For Ground Vehicle Navigation, Ehsan A. Ali, Hemin Qadir, Samuel Peter Kozaitis

Electrical Engineering and Computer Science Faculty Publications

Operating in a degraded visual environment due to darkness can pose a threat to navigation safety. Systems have been developed to navigate in darkness that depend upon differences between objects such as temperature or reflectivity at various wavelengths. However, adding sensors for these systems increases the complexity by adding multiple components that may create problems with alignment and calibration. An approach is needed that is passive and simple for widespread acceptance. Our approach uses a type of augmented display to show fused images from visible and thermal sensors that are continuously updated. Because the raw fused image gave an unnatural …

Path Optimization For Oil Probe, O'Neal Smith, Mark Rahmes, Mark Blue, Adrian M. Peter

Electrical Engineering and Computer Science Faculty Publications

We discuss a robust method for optimal oil probe path planning inspired by medical imaging. Horizontal wells require three-dimensional steering made possible by the rotary steerable capabilities of the system, which allows the hole to intersect multiple target shale gas zones. Horizontal "legs" can be over a mile long; the longer the exposure length, the more oil and natural gas is drained and the faster it can flow. More oil and natural gas can be produced with fewer wells and less surface disturbance. Horizontal drilling can help producers tap oil and natural gas deposits under surface areas where a vertical …

The Electromagnetic Articulography Mandarin Accented English (Ema-Mae) Corpus Of Acoustic And 3d Articulatory Kinematic Data, Jeffrey J. Berry, An Ji, Michael T. Johnson

Speech Pathology and Audiology Faculty Research and Publications

There is a significant need for more comprehensive electromagnetic articulography (EMA) datasets that can provide matched acoustics and articulatory kinematic data with good spatial and temporal resolution. The Marquette University Electromagnetic Articulography Mandarin Accented English (EMA-MAE) corpus provides kinematic and acoustic data from 40 gender and dialect balanced speakers representing 20 Midwestern standard American English L1 speakers and 20 Mandarin Accented English (MAE) L2 speakers, half Beijing region dialect and half are Shanghai region dialect. Three dimensional EMA data were collected at a 400 Hz sampling rate using the NDI Wave system, with articulatory sensors on the midsagittal lips, lower …

Sensorimotor Adaptation Of Speech Using Real-Time Articulatory Resynthesis, Jeffrey J. Berry, Cassandra North, Michael T. Johnson

Speech Pathology and Audiology Faculty Research and Publications

Sensorimotor adaptation is an important focus in the study of motor learning for non-disordered speech, but has yet to be studied substantially for speech rehabilitation. Speech adaptation is typically elicited experimentally using LPC resynthesis to modify the sounds that a speaker hears himself producing. This method requires that the participant be able to produce a robust speech-acoustic signal and is therefore not well-suited for talkers with dysarthria. We have developed a novel technique using electromagnetic articulography (EMA) to drive an articulatory synthesizer. The acoustic output of the articulatory synthesizer can be perturbed experimentally to study auditory feedback effects on sensorimotor …

The Smart Clock, Cory Koehler, Addison Loda, Hannah Posey-Scholl, Isak Rask

PSU High School Innovation Challenge

Modern technology continues to change and improve constantly as people find ways to make things faster, smaller, and better - but these changes often leave the elderly behind. This year’s Innovation Challenge asked groups to focus on how to create and improve technology geared towards the aging generations. For our initial research, the Grant High School team and mentors visited an elderly care center and interviewed a few of the residents, asking what types of technology currently improve their lives, and what types of technology could potentially improve their lives.

The Problem: After the interviews, we were able to identify …

Data Transfer Using Light, Ryan Thomas Suarez

Computer Engineering

A proof of concerpt for data transmission using light as a medium. Data is transferred by strobing and LED faster than the human eye can detect in an attempt to come up with a more secure alternate to in-building wifi.

Characterization And Model Verification Of Sic Cmos Transmisison Gates, Andrew H. Taylor

Electrical Engineering Undergraduate Honors Theses

The aim of this thesis is to present and explore the results of a method for characterizing CMOS transmission gates in an IC design process, as well as to describe their importance in circuit design. The method applies to any fabrication process, but the work for this thesis was conducted in a silicon-carbide process, in the first round of fabrication. The first section covers basic information regarding transmission gates, as well as showing their value in circuit design. Secondly, the design, simulation, and implementation of the characterizing test structures is detailed. The third section delineates the test setup and procedures …

Implementation Of Prediction Algorithms To Reduce Latency In Control Of Switching Converters, Brent Bell

Electrical Engineering Undergraduate Honors Theses

Using pulse-width modulation (PWM) to control switching converters such as a dual active bridge introduces latency into a system [1]. Latency in a switching converter decreases the effective bandwidth that the converter can be switched at and for the case of a closed loop control system decreases the effective closed loop system stability. This delay can be attributed to sampling of the control signal and calculation time for the PWM. If a prediction scheme is implemented in this calculation, the next switching time could be predicted to remove any latency. There are effectively two steps in order to achieve this …

Ua66 Ogden College Of Science & Engineering Newsletter, Cheryl Stevens, Dean

Ogden College of Science & Engineering Publications

No abstract provided.

Developing A Tool For Generation Of Operational Amplifier Models From Datasheet Parameters, Benjamin Riley Sissons

Electrical Engineering Undergraduate Honors Theses

Due to their flexibility and usefulness operational amplifiers are a very common circuit component that has been in use for over fifty years. Because of their widespread use in circuits there has always been a need for simulation models of the op amp. The purpose of this thesis is to demonstrate the design a tool for use with the modeling software ModLyng that takes several parameters from the datasheet of an op amp and generates a model that can be exported to several popular hardware description languages including Verilog-A and Verilog-AMS. The tool was designed as a plugin for ModLyng …