Targeting Breast Cancer Detection With Communications Technology,
2011
University of Arkansas Little Rock
Targeting Breast Cancer Detection With Communications Technology, Hacer Varol
Theses and Dissertations
Breast cancer continues to be a significant public health problem in the United States: It is the second leading cause of female mortality, and, disturbingly, one out of eight women in the United States will be diagnosed with breast cancer in her life time. Until the cause of this disease is fully understood, early detection remains the only hope to improve prognosis and treatment. In this thesis, the tumor detection problem in breast images is formulated as a hypothesis testing problem, where the signal of interest is the tumor and the noise refers to the healthy tissue in the breast. …
Cascaded Microwave Network Approach For Power And Signal Integrity Analysis Of Multilayer Electronic Packages,
2011
Missouri University of Science and Technology
Cascaded Microwave Network Approach For Power And Signal Integrity Analysis Of Multilayer Electronic Packages, Zaw Zaw Oo, En Xiao Liu, Xing Chang Wei, Yaojiang Zhang, Er Ping Li
Electrical and Computer Engineering Faculty Research & Creative Works
In this paper, an efficient cascaded microwave network approach is presented for power and signal integrity analysis of multilayer printed-circuit boards (PCBs) and advanced electronic packages with multiple signal traces, multiple power-ground plates, multiple vias, and external loads such as decoupling capacitors. Each parallel-plate pair, which consists of two consecutive conductor plates functioning as either power or ground in the PCBs or packages, is modeled as one individual microwave network. Equivalent circuits are used in the microwave network to model the vias, and a parallel-plate impedance matrix is formulated to account for the wave interactions between the vias and the …
Coaxial Cable Bragg Grating,
2011
Missouri University of Science and Technology
Coaxial Cable Bragg Grating, Tao Wei, Songping Wu, Jie Huang, Hai Xiao, Jun Fan
Electrical and Computer Engineering Faculty Research & Creative Works
This paper reports a coaxial cable Bragg grating (CCBG) fabricated by drilling holes into the cable at periodic distances along the axial direction. Resonances were observed at discrete frequencies in both transmission and reflection spectra. The analogy of the CCBG with a fiber Bragg grating is shown. The grating was tested for the potential application as a strain-sensing device.
Smartpark Shock Absorbers For Wind Farms,
2011
Missouri University of Science and Technology
Smartpark Shock Absorbers For Wind Farms, Ganesh K. Venayagamoorthy, P. Mitra
Electrical and Computer Engineering Faculty Research & Creative Works
Vehicle-to-grid power transactions will be integrated in future smart grids. This letter presents the novel idea of utilizing plug-in vehicle parking lots (SmartParks) to reduce the shock on the transmission lines connected to a wind farm caused by drastic variations in wind-power generation and to prevent the neighboring lines from overloading. the idea is demonstrated on a power system consisting of a large wind farm and six SmartParks modeled on a real-time simulator. © 2011 IEEE.
Frequency-Domain Turbo Equalization With Soft Successive Interference Cancellation For Single Carrier Mimo Underwater Acoustic Communications,
2011
Missouri University of Science and Technology
Frequency-Domain Turbo Equalization With Soft Successive Interference Cancellation For Single Carrier Mimo Underwater Acoustic Communications, Jian Zhang, Yahong Rosa Zheng
Electrical and Computer Engineering Faculty Research & Creative Works
This paper proposes a low-complexity frequency-domain turbo equalizer (FDTE) combined with phase rotation compensation and soft successive interference cancellation (SSIC) for single carrier multiple-input multiple-output (MIMO) underwater acoustic (UWA) communications. Different from existing time-domain turbo equalizers in MIMO UWA systems, the proposed receiver implements low-complexity turbo equalization in the frequency domain to combat severe inter-symbol interference (ISI) and employs a layered structure to cope with unbalanced MIMO channels. Soft, rather than hard, successive interference cancellation (SIC) is employed in the layered iterative turbo detection to alleviate co-channel interference (CCI), and phase compensation is utilized within the layered FDTE to mitigate …
A Further Look At The 'Reactance Of A Parallel Rlc Circuit',
2011
The College of the Bahamas
A Further Look At The 'Reactance Of A Parallel Rlc Circuit', Kenneth V. Cartwright, Edit J. Kaminsky
Electrical Engineering Faculty Publications
We show that the maximum impedance of the parallel combination of a resistor R, an inductor L and capacitor C, studied in a previous paper can be found analytically, without using calculus. In fact, we show that the maximum impedance of this parallel combination is just the value of the resistor R and occurs when the driving frequency is equal to 1/ . o LC These results were only demonstrated graphically in the aforementioned paper. We also provide PSpice simulations which verify the theoretical predictions.
Secure Wireless Communication And Optimal Power
Control Under Statistical Queueing Constraints,
2011
University of Nebraska-Lincoln
Secure Wireless Communication And Optimal Power Control Under Statistical Queueing Constraints, Deli Qiao, M. Cenk Gursoy, Senem Velipasalar
Department of Electrical and Computer Engineering: Faculty Publications
In this paper, secure transmission of information over fading broadcast channels is studied in the presence of statistical queueing constraints. Effective capacity is employed as a performance metric to identify the secure throughput of the system, i.e., effective secure throughput. It is assumed that perfect channel side information (CSI) is available at both the transmitter and the receivers. Initially, the scenario in which the transmitter sends common messages to two receivers and confidential messages to one receiver is considered. For this case, the effective secure throughput region, which is the region of constant arrival rates of common and …
Vibration-Based Health Monitoring Of Multiple-Stage Gear Train And Differential Planetary Transmission Involving Teeth Damage And Backlash Nonlinearity,
2011
California Polytechnic State University, San Luis Obispo
Vibration-Based Health Monitoring Of Multiple-Stage Gear Train And Differential Planetary Transmission Involving Teeth Damage And Backlash Nonlinearity, Andrew Patrick Sommer
Master's Theses
The objective of this thesis is to develop vibration-based fault detection strategies for on-line condition monitoring of gear transmission systems. The study divides the thesis into three sections. First of all, the local stresses created by a root fatigue crack on a pinion spur gear are analyzed using a quasi-static finite element model and non-linear contact mechanics simulation. Backlash between gear teeth which is essential to provide better lubrication on tooth surfaces and to eliminate interference is included as a defect and a necessary part of transmission design. The second section is dedicated to fixed axis power trains. Torsional vibration …
Analysis Of Migration Models Of Biogeography-Based Optimization Using Markov Theory,
2011
Shaoxing University, Shaoxing, China
Analysis Of Migration Models Of Biogeography-Based Optimization Using Markov Theory, Haiping Ma, Daniel J. Simon
Electrical and Computer Engineering Faculty Publications
Biogeography-based optimization (BBO) is a new evolutionary algorithm inspired by biogeography, which involves the study of the migration of biological species between habitats. Previous work has shown that various migration models of BBO result in significant changes in performance. Sinusoidal migration models have been shown to provide the best performance so far. Motivated by biogeography theory and previous results, in this paper a generalized sinusoidal migration model curve is proposed. A previously derived BBO Markov model is used to analyze the effect of migration models on optimization performance, and new theoretical results which are confirmed with simulation results are obtained. …
The Eigenvalues Of A Tridiagonal Matrix In Biogeography,
2011
BMI Research
The Eigenvalues Of A Tridiagonal Matrix In Biogeography, Boris Igelnik, Daniel J. Simon
Electrical and Computer Engineering Faculty Publications
We derive the eigenvalues of a tridiagonal matrix with a special structure. A conjecture about the eigenvalues was presented in a previous paper, and here we prove the conjecture. The matrix structure that we consider has applications in biogeography theory.
Robust And Resilient Finite-Time Control Of A Class Of Discrete-Time Nonlinear Systems,
2011
Marquette University
Robust And Resilient Finite-Time Control Of A Class Of Discrete-Time Nonlinear Systems, Mohammad N. Elbsat, Edwin E. Yaz
Electrical and Computer Engineering Faculty Research and Publications
In this paper, we address the finite-time state-feedback stabilization of a class of discrete-time nonlinear systems with conic type nonlinearities, bounded feedback control gain perturbations, and additive disturbances. Sufficient conditions for the existence of a robust and resilient linear state feedback controller for this class of systems are derived. Then, using linear matrix inequality techniques, a solution for the controller gain is obtained. The developed controller is robust for all unknown nonlinearities lying in a hyper-sphere and all admissible disturbances. Moreover, it is resilient against any bounded perturbations that may alter the controller’s gain by at most a prescribed amount. …
Observations Of The Wind Resource Across The Dublin Urban Area,
2011
University College Dublin
Observations Of The Wind Resource Across The Dublin Urban Area, Keith Sunderland, Michael Conlon, Gerald Mills, Rowan Feely
Conference papers
This paper presents an investigation of wind observations made at three (of a network of ten) stations in Dublin. Two of the stations are located over different parts of the urbanized landscape and one is located at Dublin Airport, which exemplifies a typical meteorological station. The purpose of the analysis is to evaluate the nature of the wind resource in the urban area. The potential output of a range of commercially available micro wind turbines at one of the stations is considered. At this location, an anemometer is mounted in a similar manner to international examples of building mounted domestic …
The Effects Of Interface Protection Requirements On The Stability Of Embedded Generation Connected To The Irish Distribution System,
2011
Technological University Dublin
The Effects Of Interface Protection Requirements On The Stability Of Embedded Generation Connected To The Irish Distribution System, Damien Glennon
Msc. in Energy Management
The electricity sector in Ireland has undergone a number of changes in the last 20 years. In the early 90’s the fuel mix was predominantly fossil fuel based with a very small percentage of renewables on the system. The electricity generation portfolio was dominated by coal/gas/peat fired power stations which used large synchronous machines to generate electricity. These synchronous machines provided the necessary system inertia and kept the system frequency stable. However, rising fuel costs, dwindling fossil fuel supplies, climate change etc. has driven the growth of renewable energy especially in the electricity sector. Current targets for renewable energy in …
Electron Transport Through Two Irreducibly-Coupled Aharonov-Bohm Rings With Applications To Nanostructure Quantum Computing Circuits,
2011
Missouri University of Science and Technology
Electron Transport Through Two Irreducibly-Coupled Aharonov-Bohm Rings With Applications To Nanostructure Quantum Computing Circuits, C. A. Cain, Cheng-Hsiao Wu
Electrical and Computer Engineering Faculty Research & Creative Works
We investigated several classes of two coupled Aharonov-Bohm rings that share a finite center common path, where the phase of the electron wave function can be modulated by two distinct magnetic fluxes. The coupling is similar to two coupled atoms. The behavior of charge accumulation along the center common path or, equivalently, the bonding and anti-bonding of the two rings can be achieved as the two applied fluxes are varied. Thus, when three external terminals are connected to such coupled rings, the behavior of the electron transport is divided into several classes, depending on the number of atoms in each …
Smartpark As A Virtual Statcom,
2011
Missouri University of Science and Technology
Smartpark As A Virtual Statcom, Pinaki Mitra, Ganesh K. Venayagamoorthy, Keith Corzine
Electrical and Computer Engineering Faculty Research & Creative Works
Power electronic-Based FACTS devices such as STATCOMs are sometimes essential for voltage support in transmission networks. They can also be used for continuous operation of doubly fed induction generator-Based wind turbines during faults. However, these devices are quite expensive and therefore cannot be used extensively. This paper explores the potential of a low-cost solution that utilizes the reactive power and voltage support capabilities of plug-in vehicles parked in charging stations (SmartParks) so that they can behave as virtual STATCOMs. for this solution, a 12-bus multimachine power system is considered wherein one of the conventional units is replaced by a 400 …
Low-Complexity Soft-Decision Feedback Turbo Equalization For Mimo Systems With Multilevel Modulations,
2011
Missouri University of Science and Technology
Low-Complexity Soft-Decision Feedback Turbo Equalization For Mimo Systems With Multilevel Modulations, Amirhossein Rafati, Huang Lou, Chengshan Xiao
Electrical and Computer Engineering Faculty Research & Creative Works
Many communication systems today encounter the problem of data transmission over a channel with InterSymbol interference (ISI). the purpose of this paper is to develop a low-complexity iterative soft-decision feedback equalization (SDFE) receiver for severe frequency-selective ISI channels in multiple-input-multiple-output (MIMO) communication systems. the proposed SDFE algorithm offers a novel approach to combat error propagation. in addition, its computational complexity only linearly grows with the number of equalizer coefficients, compared with the quadratic complexity of minimum mean square error (MMSE)-Based linear turbo equalizer with time-varying coefficients. the performance of the proposed detection scheme is verified through simulations using different signal …
Hyperspectral-Based Adaptive Matched Filter Detector Error As A Function Of Atmospheric Profile Estimation,
2011
Air Force Institute of Technology
Hyperspectral-Based Adaptive Matched Filter Detector Error As A Function Of Atmospheric Profile Estimation, Allan W. Yarbrough
Theses and Dissertations
Hyperspectral imagery is collected as radiance data. This data is a function of multiple variables: the radiation profile of the light source, the reflectance of the target, and the absorption and scattering profile of the medium through which the radiation travels as it reflects off the target and reaches the imager. Accurate target detection requires that the collected image matches as closely as possible the known "true" target in the classification database. Therefore, the effect of the radiation source and the atmosphere must be removed before detection is attempted. While the spectrum of solar light is relatively stable, the effect …
Development Of A Vibration-Powered Impact Recorder,
2011
New Jersey Institute of Technology
Development Of A Vibration-Powered Impact Recorder, William Contreras
Theses
Currently, the U.S. Army stores a great deal of equipment for long periods of time. Often, this equipment is subjected to damaging vibrations. Given this, the army wants to be able to monitor the vibrations that are undergone by this equipment. Here, a battery-powered monitoring device would be undesirable because its batteries would need to be replaced. To solve this problem, an energy harvesting, vibration monitoring device has been developed. The device, which is known as a vibration-powered impact recorder (VPIR for short), uses a piezoelectric transducer to power a microcontroller, which uses the power to count the number of …
Orthogonal Space Time Coding For Im/Dd Optical Wireless Communication With Single Carrier Frequency Domain Equalization,
2011
New Jersey Institute of Technology
Orthogonal Space Time Coding For Im/Dd Optical Wireless Communication With Single Carrier Frequency Domain Equalization, Nan Wu
Theses
Recently the development of optical wireless communication has received growing attention because of its unlimited bandwidth and simple implementation as compared to radio frequency communication application for indoor wireless data transmission. The objective of this thesis is to improve the performance of intensity-modulated direct- detection (IM/DD) optical wireless communications with single carrier frequency domain equalization (SCFDE) by using Orthogonal Space Time Code (OSTC). More attention has been paid to three SCFDE schemes due to their outstanding performances in practical cases. It is demonstrated that OSTC can be modified to be suitable to optical systems and provide an excellent enhancement to …
Probing Ultra-Subwavelength Inhomogeneities Embedded Within Dielectric Targets Using Photonic Nanojets,
2011
University of New Mexico
Probing Ultra-Subwavelength Inhomogeneities Embedded Within Dielectric Targets Using Photonic Nanojets, Cesar Méndez Ruiz
Electrical and Computer Engineering ETDs
The use of optics to detect ultra-subwavelength features embedded within structures is a hot topic for a broad diversity of applications like spectroscopy, nanotechnology, microscopy, and optical data storage discs. Conventional objective lens based optical systems have a fundamental limit on the best possible resolution of about 200 \u03b7m due to the diffraction of light as it propagates into the far-field. There already exist several near-field techniques with the capability to overcome this limitation, but each of these systems has certain drawbacks related to the complexity of the system or to limitations imposed by the system. A photonic nanojet is …
