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An Ic Design For Wireless Batteryless Multi-Sensing Platform For Biomedical Applications, Young-Sik Seo
An Ic Design For Wireless Batteryless Multi-Sensing Platform For Biomedical Applications, Young-Sik Seo
Electrical Engineering Dissertations
This work proposed an integrated circuit (IC) design that provides the required functionality for a wireless, batteryless implant. For biomedical applications, the physiological signals can be detected if the parameter of interest can be converted to a change in electrical parameters such as capacitance, resistance or an amperometric signal. The implantable transponder is suitable for sensors that generate one of the aforementioned analog signals. In the proposed universal platform, a voltage-controlled oscillator (VCO) was used to detect variations of voltage or current. Similarly, a relaxation oscillator (RO) was used to detect changes in capacitance or resistance. Thus, the VCO and …
Fabrication And Modification Of Implantable Micro-Probes For Neuro-Studies, Hung Viet Cao
Fabrication And Modification Of Implantable Micro-Probes For Neuro-Studies, Hung Viet Cao
Electrical Engineering Dissertations
In this work, different types of implantable probes fabricated on Si and polyimide substrates for sensing neurotransmitters, recording extracellular action potentials and stimulating the neurons have been developed. Several electrode configurations have been designed for implantation at various locations in the central nervous system. Each probe contains a multi electrode array (MEA) of 3, 5, 7 or 16 metal electrodes (Au or Pt) fabricated by electron-beam evaporation and lift-off processes. For sensing purpose, as a proof-of-principle, dopamine (DA) and L-glutamate sensors have been implemented. The surface of electrodes was modified with nanostructures by different methods appropriate to the substrate and …
Some Considerations Of Performance And Capacity Of Voice Over Ip High Bit Rate Wireless Reverse Links, Richard Framjee
Some Considerations Of Performance And Capacity Of Voice Over Ip High Bit Rate Wireless Reverse Links, Richard Framjee
Electrical Engineering Dissertations
Evaluation of the performance and capacity of the wireless reverse links, that support concurrent voice over IP and packet data services, is important for spectral efficiency considerations. For a given traffic mix, this capacity is the maximum Erlangs and data throughput at a given packet error rate, voice packet expected wait time and probability of wait time outage. The voice packet wait times are traffic induced and due to retransmissions caused by high packet error rate. In this dissertation the error rate of high bit rate DS-SS BPSK RAKE receivers and traffic induced expected packet wait time for voice over …
Design, Fabrication And Characterization Of Guided-Mode Resonance Transmission Filters, Mohammad Shyiq Amin
Design, Fabrication And Characterization Of Guided-Mode Resonance Transmission Filters, Mohammad Shyiq Amin
Electrical Engineering Dissertations
This dissertation addresses photonic devices enabled by the guided-mode resonance (GMR) effect. As periodic phototonic structures can become highly reflective or transmissive at resonance, this effect has been utilized to design suites of optical elements including reflection filters, transmission filters, broadband mirrors, polarizers, and absorbers with a plethora of possible deployment venues. Even though there has been considerable research on the reflection type GMR elements, attendant transmission filters have less explored experimentally, as there is material limitation to design this kind of filters with simple architecture and they also may require coupling to multiple resonances simultaneously. Apart from the design …
Sparse Sensing In Big Data, Junjie Chen
Sparse Sensing In Big Data, Junjie Chen
Electrical Engineering Dissertations
Big data requires exceptional technologies to efficiently process large quantities of data within tolerable elapsed times. While the potential benefits of Big Data are significant, there are still a lot of technical challenges that must be solved to fully realize this potential for Big Data.For processing, transporting and storing large data sets of enormous sizes, data need to be greatly compressed. In this thesis, several sparse sensing algorithms - compressive sensing (CS), co-prime sampling and nested sampling are studied for Big Data, in theory and applications.Error performance bounds of noisy compressive sensing are derived based on information theory and estimation …
Using Advanced Metering Infrastructure Data For Smart Grid Development, Franklin L. Quilumba-Gudino
Using Advanced Metering Infrastructure Data For Smart Grid Development, Franklin L. Quilumba-Gudino
Electrical Engineering Dissertations
Identifying and using Advanced Metering Infrastructure (AMI) data to improve customer experience, utility operations, and advanced power management is one of the most important challenges in the smart grid development. Smart meters, capable of capturing frequent interval customer consumption (and possibly other parameters) using communication networks, are vital components of smart grid technology. Thus, smart meters expand the available range of data and functionality. Making the most of information from smart meters and smart grids increasingly requires dealing with Big Data. Big Data is a game changer, enabling utilities to transform the ways they interact with and serve their customers.Today, …
Energy Storage Devices For Seamless Integration Of Renewable Energy, Meng Liu
Energy Storage Devices For Seamless Integration Of Renewable Energy, Meng Liu
Electrical Engineering Dissertations
Renewable energy, as a promising resource for supporting continuously growing electricity demand, bears the disadvantages of un-controllable variability and partial unpredictability, which present challenges for large-scale integration into power systems. To maintain stable system frequency, the mechanical energy driving the generators should be balanced with the electrical energy consumed by loads and losses at all times. However, high penetration level of renewable energy presents challenges for this basic requirement. Energy storage system (ESS) is one of the most promising solutions to shape the variable renewable generation to follow certain production plans which benefits both system operation and market participation. In …
Hybrid And Smart Grid Wireless Networks: Capacity And Optimization, Xin Wang
Hybrid And Smart Grid Wireless Networks: Capacity And Optimization, Xin Wang
Electrical Engineering Dissertations
Hybrid wireless network is a combination of ad hoc network and cellular network. A key question arising in such hybrid wireless networks is what is the per-node data transmission limit of the hybrid wireless network over general fading channels and how the throughput capacity varies with different network setup. To our best knowledge, our research is the first piece of work in literature to take up this challenge. To achieve the maximum per-node throughput, an opportunistic communication strategy together with successive interference cancelation (SIC) technique is proposed in this dissertation. The scaling laws for the throughput capacity over both slow …
A Formalized Method For State Machine Software Implementation In Smart Microgrid Control Systems, Gregory Kyle Turner
A Formalized Method For State Machine Software Implementation In Smart Microgrid Control Systems, Gregory Kyle Turner
Electrical Engineering Dissertations
The introduction section begins with a discussion of the electric power grid in general and a specific definition for Smart Grids and Microgrids. These two different but complimentary technologies combine to form the overall Smart Microgrid concept. The control theory for Smart Microgrid applications is broken down into a three-tiered hierarchical scheme in order to simplify the control systems used at each level of the hierarchy. Some background information is presented about current Smart Microgrid projects.A review of recent literature focuses on three areas of interest. The review of control theory focuses mainly on the highest abstract level of the …
Distributed Cooperative Control Of Ac Microgrids, Ali Bidram
Distributed Cooperative Control Of Ac Microgrids, Ali Bidram
Electrical Engineering Dissertations
In this dissertation, the comprehensive secondary control of electric power microgrids is of concern. Microgrid technical challenges are mainly realized through the hierarchical control structure, including primary, secondary, and tertiary control levels. Primary control level is locally implemented at each distributed generator (DG), while the secondary and tertiary control levels are conventionally implemented through a centralized control structure. The centralized structure requires a central controller which increases the reliability concerns by posing the single point of failure. In this dissertation, the distributed control structure using the distributed cooperative control of multi-agent systems is exploited to increase the secondary control reliability. …
Target Detection And Cognitive Radio Capacity Analysis Based On Sensor Networks, Ishrat Maherin
Target Detection And Cognitive Radio Capacity Analysis Based On Sensor Networks, Ishrat Maherin
Electrical Engineering Dissertations
In this dissertation we studied two topics which are focused on target detection through foliage and capacity analysis of cognitive radio. We propose a multi-step information theory based scheme for target detection through foliage, using ultra wide-band (UWB) radar sensor network (RSN). This method is motivated by the fact that echoes from the stationary target, obscured by foliage, are more random than the region without the target. This is resolved by three steps of information fusion. Information fusion and integration is the process of combining data from several radar sensors and can achieve results that are not possible by individual …
Towards Perfect Light Coupling And Absorption In Nanomembranes With Omni-Directional Anti-Refelction And Photonic Crystal Structures, Arvinder Chadha
Towards Perfect Light Coupling And Absorption In Nanomembranes With Omni-Directional Anti-Refelction And Photonic Crystal Structures, Arvinder Chadha
Electrical Engineering Dissertations
Silicon photonics is realized as a promising platform to meet the requirements of higher bandwidth and low cost high density monolithic integration. More recent demonstrations of a variety of stretchable, foldable and transfer printed ultra-thin silicon integrated circuits have instigated the use of flexible silicon nanomembrane for practical applications. Equally impressive innovations are demonstrated in the area of flat screen displays, smart cards, eyeglasses, and wearable displays. However, the overall efficiency of a variety of optical device is limited by poor light management resulting from difficulty of light coupling, small absorption volume in thin-film nanomembrane, and glare at oblique incidence …
Molecular And Textural Surface Engineering For Biological Sensing, Mohammed Arif Iftakher Mahmood
Molecular And Textural Surface Engineering For Biological Sensing, Mohammed Arif Iftakher Mahmood
Electrical Engineering Dissertations
This research work was aimed at finding novel approaches for early cancer detection. In cancer diagnosis, the candidate molecules largely include free DNA, related proteins and tumor cells, listed in increasing order of size. The list is also commonly accepted as early precursor of the disease where DNA and proteins are available in patients' blood earlier and the cell starts to appear in relatively later stage. The ratio of these molecules to the background matter is extremely small. To make detection more difficult, these molecules, once dislodged from their primary location, get cleared fast. These factors call for extremely sensitive …
Guided-Mode Resonant Solar Cells And Flat-Top Reflectors: Analysis, Design, Fabrication And Characterization, Tanzina Khaleque
Guided-Mode Resonant Solar Cells And Flat-Top Reflectors: Analysis, Design, Fabrication And Characterization, Tanzina Khaleque
Electrical Engineering Dissertations
This dissertation addresses the guided-mode resonance (GMR) effect and its applications. In particular, this study presents theoretical analysis and corresponding experiments on two important GMR devices that can be broadly described as GMR-enabled thin-film solar cells and flat-top reflectors.The GMR-induced enhanced absorption of input light is observed and quantified in a fabricated nano-patterned amorphous silicon (a-Si) thin-film. Compared to a reference homogeneous thin-film of a-Si, approximately 50% integrated absorbance enhancement is achieved in the patterned structure. This result motivates the application of these resonance effects in thin-film solar cells where enhanced solar absorbance is a crucial requirement. Light trapping in …
Flexible Mems Sensors And Pyroelectric Thin Films, Moinuddin Ahmed
Flexible Mems Sensors And Pyroelectric Thin Films, Moinuddin Ahmed
Electrical Engineering Dissertations
MEMS sensors on flexible substrates were developed and fabricated utilizing conventional lithography, deposition and etching tools. All of these sensors were fabricated in a MESA structure on the flexible substrates for tactile sensing, robotic, and biomedical applications. In addition, a new processing technique was developed to release the flexible substrate more easily from the rigid silicon carrier wafer to increase fabrication yield. Temperature sensors were fabricated on flexible substrates; utilizing amorphous silicon as the sensing material. After releasing from the rigid silicon carrier wafer, the sensors were packaged and characterized for their I-V, thermal response and 1/f noise properties. The …
Home Area Networks For Smart Grid Communications, Zhuo Li
Home Area Networks For Smart Grid Communications, Zhuo Li
Electrical Engineering Dissertations
his dissertation studies five topic which are focused on but not limited to the area of Home Area Networks (HANs) in Smart Grid communications: capacity optimization for IR-UWB (Chapter 2), power consumption and downlink outage probability in a dynamic HAN (Chapter 3), uplink multiuser selection in a dynamic HAN (Chapter 4), capacity optimization in Heterogeneous HANs (Chapter5), hybrid models of OFDM-based power line and wireless communications for HAN security (Chapter 6), and scaling laws of ergodic capacity for hybrid wireless networks with distributed base stations (DBS) (Chapter 7). We investigate the capacity optimization of Impulse Radio (IR) UWB user within …
Identification Of The Interdependence Of Aging And Internal Pressure Evolution Of Commercial Li-Ion Cells, Anthony Matasso
Identification Of The Interdependence Of Aging And Internal Pressure Evolution Of Commercial Li-Ion Cells, Anthony Matasso
Electrical Engineering Dissertations
The demand for high power and energy coupled with long cycle life, low cost, and increased safety have become the driving factors in the development of lithium-ion batteries. This demand continues to expand with the sustained capability expansion of high power military applications, electric vehicles, grid-tie energy storage, and other renewable energy applications. Unlike the short innovation cycles that technologies like portable electronics experience, these applications are focused on an affordable long term product lifecycle that is safe. In order to achieve these long term goals, a better understanding of the chief degradation mechanisms as well as a more sophisticated …
A New Feature Descriptor For Lidarstrip Matching, Mythreya Jayendra Lakshman
A New Feature Descriptor For Lidarstrip Matching, Mythreya Jayendra Lakshman
Electrical Engineering Dissertations
Light Detection and Ranging (LiDAR) data has been getting a lot of attention these days because of its applicability in various fields - city planning, disaster response & precaution, soil conservation, infrastructure or forestry. Raw LiDAR data is not directly usable in the above-mentioned applications. Therefore, an important aspect of the aerial LIDAR system is to process raw LiDAR data accurately. The processed data is then made available to us in the form of point clouds or digital elevation maps (DEM's) or digital surface maps (DSM's). Each swath of raw data represents a single flight path over a region of …