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Next Generation Wireless Communications: Cognitive Radio, ADNAN QUADRI, Naima Kaabouch 2017 University of North Dakota

Next Generation Wireless Communications: Cognitive Radio, Adnan Quadri, Naima Kaabouch

ADNAN QUADRI

Wireless networks and information traffic have grown exponentially over the last decade. Consequently, an increase in demand of radio frequency bandwidth has resulted. Recent studies have shown that with the current fixed spectrum allocation, there are spectrum holes that are not utilized all the time by the licensed users while other frequency channels, such as Wi-Fi, are heavily used. To efficiently utilize the radio spectrum, cognitive radio stands to be a promising solution as it will be reconfigurable, self-aware and efficient. This research aims to develop techniques that will allow a cognitive radio system to enhance the radio’s decision-making ...


Zone Based Hybrid Approach For Clustering And Data Collection In Wireless Sensor Networks, Karanam R. Dayananda, Jeremy Straub 2017 North Dakota State University--Fargo

Zone Based Hybrid Approach For Clustering And Data Collection In Wireless Sensor Networks, Karanam R. Dayananda, Jeremy Straub

Jeremy Straub

A wireless sensor network (WSN) is a collection of
spatially distributed autonomous sensor nodes that can be used to
monitor, among other things, environmental conditions. WSN
sensor nodes are constrained by their limited energy supply,
communication range and local computational capabilities. Data
routing is an area that can be optimized to allow nodes to conserve
energy, improving the network’s overall lifetime. Though many
routing protocols can be used, using a clustering protocol can play
an important role in conserving WSN energy. Under this
approach, the network is divided into multiple clusters. The
leader of each cluster supervises data transmission ...


Design Of A Community-Supported Capable Microwave System For People With Intellectual And Physical Disabilities, Matteo Zallio, Damon Berry, Paula Kelly, Hicham Rifai, Modestas Jakuska 2017 Dublin Institute of Technology

Design Of A Community-Supported Capable Microwave System For People With Intellectual And Physical Disabilities, Matteo Zallio, Damon Berry, Paula Kelly, Hicham Rifai, Modestas Jakuska

Conference papers

Product personalisation has become a central topic and expected part of every day life. Different people have different characteristics and abilities and every single user has different needs which means that products have to be tailored accordingly. Micro- wave ovens are one of the most commonly used home appliances. People use them to quickly heat or cook certain foods. Today, according to the US Bureau of Labor Statis- tics, more than 90% of U.S. households own a microwave oven [11]. This project seeks to enable people with intellectual disabilities and physical impairments to perform sim- ple cooking tasks. The ...


Ocean Renewable Power Company, James Donegan 2017 Ocean Renewable Power Company

Ocean Renewable Power Company, James Donegan

MARENER 2017

No abstract provided.


Design Of Radio-Frequency Arrays For Ultra-High Field Mri, Ian R O Connell 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, Ze Wang 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 ...


Topography Measurements Using An Airborne Ka-Band Fmcw Interferometric Synthetic Aperture Radar, Kan Fu 2017 University of Massachusetts - Amherst

Topography Measurements Using An Airborne Ka-Band Fmcw Interferometric Synthetic Aperture Radar, Kan Fu

Doctoral Dissertations May 2014 - current

Radar interferometry at millimeter-wave frequencies has the ability of topography measurement of different types of terrain, such as water surfaces and tree canopies. A Ka-band interferometric radar was mounted on an airborne platform, and flown over the Connecticut river region in western Massachusetts near Amherst on June 11, 2012. More than 20 Gigabytes of raw data was recorded. This dissertation outline presents the results of the data processing, which includes (1) the estimation and removal of the embedded high frequency phase error in the raw data; (2) the synthetic aperture processing; (3) the interferometric processing. The digital elevation model (DEM ...


The Impact Of Quantum Size Effects On Thermoelectric Performance In Semiconductor Nanostructures, Adithya Kommini 2017 University of Massachusetts - Amherst

The Impact Of Quantum Size Effects On Thermoelectric Performance In Semiconductor Nanostructures, Adithya Kommini

Masters Theses May 2014 - current

An increasing need for effective thermal sensors, together with dwindling energy resources, have created renewed interests in thermoelectric (TE), or solid-state, energy conversion and refrigeration using semiconductor-based nanostructures. Effective control of electron and phonon transport due to confinement, interface, and quantum effects has made nanostructures a good way to achieve more efficient thermoelectric energy conversion. This thesis studies the two well-known approaches: confinement and energy filtering, and implements improvements to achieve higher thermoelectric performance. The effect of confinement is evaluated using a 2D material with a gate and utilizing the features in the density of states. In addition to that ...


Kasi: A Ka-Band And S-Band Cross-Track Interferometer, Gerard Ruiz Carregal 2017 University of Massachusetts - Amherst

Kasi: A Ka-Band And S-Band Cross-Track Interferometer, Gerard Ruiz Carregal

Masters Theses May 2014 - current

A dual-frequency system is needed to better understand natural processes that constitute the environment and seasonal cycles of the Earth. A system working at two different wavelengths acquiring data simultaneously will give a valuable dataset since the conditions on the ground will be exactly the same. Hence, elements such as wind, soil moisture or any other changes on the ground will not interfere in the mea- surements. This thesis explains how an S-band radar was built and tested. Moreover, the experiments done with a Ka-band radar used as a scatterometer are explained as well as the data processing and analysis ...


Design And Analysis Of A Fully-Integrated Resonant Gate Driver, Yu Long 2016 University of Tennessee, Knoxville

Design And Analysis Of A Fully-Integrated Resonant Gate Driver, Yu Long

Doctoral Dissertations

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 ...


Improving The Speech Intelligibility By Cochlear Implant Users, Behnam Azimi 2016 University of Wisconsin-Milwaukee

Improving The Speech Intelligibility By Cochlear Implant Users, Behnam Azimi

Theses and Dissertations

In this thesis, we focus on improving the intelligibility of speech for cochlear implants (CI) users. As an auditory prosthetic device, CI can restore hearing sensations for most patients with profound hearing loss in both ears in a quiet background. However, CI users still have serious problems in understanding speech in noisy and reverberant environments. Also, bandwidth limitation, missing temporal fine structures, and reduced spectral resolution due to a limited number of electrodes are other factors that raise the difficulty of hearing in noisy conditions for CI users, regardless of the type of noise. To mitigate these difficulties for CI ...


Solid State Protective Device Topological Trade-Offs For Mvdc Systems, Vikas Singh 2016 University of Wisconsin-Milwaukee

Solid State Protective Device Topological Trade-Offs For Mvdc Systems, Vikas Singh

Theses and Dissertations

Presently accepted approaches to protection are “Unit-Based” which means the power converter(s) feeding the bus coordinate with no-load electromechanical switches to isolate faulted portions of the bus. However, “Breaker-Based” approaches, which rely upon solid state circuit breakers for fault mitigation can result in higher reliability of power and potentially higher survivability. The inherent speed of operation of solid state protective devices will also play a role in fault isolation, hence reducing stress level on all system components. A comparison study is performed of protective device topologies that are suitable for shipboard distribution systems rated between 4kVdc and 20kVdc from ...


Accumulator Volume Sensor Final Project Report, Chris Naughton, Kinwei Yu, Michael George 2016 California Polytechnic State University, San Luis Obispo

Accumulator Volume Sensor Final Project Report, Chris Naughton, Kinwei Yu, Michael George

Mechanical Engineering

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 ...


Electric Smart Load Meter, Johnny Tran 2016 California Polytechnic State University, San Luis Obispo

Electric Smart Load Meter, Johnny Tran

Electrical Engineering

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, Caleb B. Porter 2016 California Polytechnic State University, San Luis Obispo

Active Contact Lens - Low Power Backscattering Sensor-To-Antenna Integration Circuitry, Caleb B. Porter

Electrical Engineering

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 ...


Isopropyl Alcohol Pump For Printed Circuit Boards Using An Arduino, Lawrence Zhu 2016 California Polytechnic State University, San Luis Obispo

Isopropyl Alcohol Pump For Printed Circuit Boards Using An Arduino, Lawrence Zhu

Computer Engineering

No abstract provided.


Final Design Report: Grasp Data Acquisition Project Axon Vr, Michael Erberich, Jack Schultz, Tyler Yeaman 2016 California Polytechnic State University, San Luis Obispo

Final Design Report: Grasp Data Acquisition Project Axon Vr, Michael Erberich, Jack Schultz, Tyler Yeaman

Mechanical Engineering

No abstract provided.


Design, Analysis And Simulation Of A Jitter Reduction Circuit (Jrc) System At 1ghz, RUN BIN YU 2016 California Polytechnic State University, San Luis Obispo

Design, Analysis And Simulation Of A Jitter Reduction Circuit (Jrc) System At 1ghz, Run Bin Yu

Master's Theses and Project Reports

The clock signal is considered as the “heartbeat” of a digital system yet jitter which is a variation on the arrival time of the clock edge, could undermine the overall performance or even cause failures on the system. Deterministic jitter could be reduced during the designing process however random jitter during operation is somehow less-controllable and unavoidable. Being able to remove jitter on the clock would therefore play a vital role in system performance improvement.

This thesis implements a 1GHz fully feedforward jitter reduction circuit (JRC) which can be used as an on-chip IP core at clock tree terminals to ...


Psychophysiological Analysis Of A Pedagogical Agent And Robotic Peer For Individuals With Autism Spectrum Disorders., Mohammad Nasser Saadatzi 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 ...


Cmos Based Impedance Sensing, Jinlong Gu 2016 University of Tennessee, Knoxville

Cmos Based Impedance Sensing, Jinlong Gu

Masters Theses

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 ...


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