New Algorithms For Locating Faults In Series Capacitive Compensated Transmission Lines,
2018
The University of Western Ontario
New Algorithms For Locating Faults In Series Capacitive Compensated Transmission Lines, Tirath Bains
Electronic Thesis and Dissertation Repository
The precise location of the fault in a series capacitive compensated transmission line (SCCTL) plays an integral part in limiting the maintenance time following its tripping due to the occurrence of a permanent fault. Since, an SCCTL acts as a huge corridor of power, its outage will result in huge monetary losses which are directly proportion to the time it remains out of service. In worst case scenario, the tripping of an SCCTL might lead to the cascaded tripping of the parallel transmission lines due to overloading. Therefore, the need for an accurate and robust fault location algorithm for the …
Techniques Of Energy-Efficient Vlsi Chip Design For High-Performance Computing,
2018
Louisiana State University and Agricultural and Mechanical College
Techniques Of Energy-Efficient Vlsi Chip Design For High-Performance Computing, Zhou Zhao
LSU Doctoral Dissertations
How to implement quality computing with the limited power budget is the key factor to move very large scale integration (VLSI) chip design forward. This work introduces various techniques of low power VLSI design used for state of art computing. From the viewpoint of power supply, conventional in-chip voltage regulators based on analog blocks bring the large overhead of both power and area to computational chips. Motivated by this, a digital based switchable pin method to dynamically regulate power at low circuit cost has been proposed to make computing to be executed with a stable voltage supply. For one of …
Oxygen And Silver-Oxygen Defects In Ge2se3 Electrochemical Metallization Bridge Memristors,
2018
University of New Mexico
Oxygen And Silver-Oxygen Defects In Ge2se3 Electrochemical Metallization Bridge Memristors, Jau-Tzuoo Chen
Electrical and Computer Engineering ETDs
We present density functional theory (DFT) calculations of oxygen and silver defects in a crystalline model of amorphous Ge2Se3. We studied defects arising from atomic oxygen and dioxygen, as well as interstitial silver and silver displacing germanium, following Campbell's conjecture on the mechanism of dendrite formation. For oxygen defect concentrations below 2%, we show that O2 dissociates in Ge2Se3, oxygen atoms are immobile, and oxygen atoms do not cluster. Within this model, the most preferred oxygen defect in intrinsic Ge2Se3 is Ge-O-Ge bridge. We conclude that oxygen defects …
An Ultra-Low Power Analog-To-Digital Converter For Neural Signal Recording: Comparator Research,
2018
Brigham Young University
An Ultra-Low Power Analog-To-Digital Converter For Neural Signal Recording: Comparator Research, Alexander Petrie, Dr. Shiuh-Hua Wood Chiang
Journal of Undergraduate Research
Brain diseases, such as depression and strokes, affect an ever-increasing number of the human population. Much scientific research has been devoted to finding ways towards alleviating the negative symptoms of these diseases. However, much more research must be conducted before these maladies are no longer a problem. Neural implantable devices are an essential part of such research. These tiny, electronic devices monitor electrical brain activity and wirelessly transmit the collected data to computers so scientists can analyze it. A common issue with these neural recording devices is battery life. Current technology allows for a battery to last only 3-5 years. …
Spectrum- And Energy-Efficient Radio Resource Allocation For Wireless Communications,
2018
Louisiana State University and Agricultural and Mechanical College
Spectrum- And Energy-Efficient Radio Resource Allocation For Wireless Communications, Shengjie Guo
LSU Doctoral Dissertations
Wireless communications has been evolved significantly over the last decade. During this period, higher quality of service (QoS) requirements have been proposed to support various services. In addition, due to the increasing number of wireless devices and transmission, the energy consumption of the wireless networks becomes a burden. Therefore, the energy efficiency is considered as important as spectrum efficiency for future wireless communications networks, and spectrum and energy efficiency have become essential research topics in wireless communications. Moreover, due to the exploding of number mobile devices, the limited radio resources have become more and more scarce. With large numbers of …
Individualized Clinical Practice Guidelines For Pressure Injury Management: Development Of An Integrated Multi-Modal Biomedical Information Resource,
2018
Louis Stokes Cleveland VA Medical Center
Individualized Clinical Practice Guidelines For Pressure Injury Management: Development Of An Integrated Multi-Modal Biomedical Information Resource, Kathie M. Bogie, Guo-Qiang Zhang, Steven K. Roggenkamp, Ningzhou Zeng, Jacinta Seton, Shiqiang Tao, Arielle L. Bloostein, Jiayang Sun
Institute for Biomedical Informatics Faculty Publications
Background: Pressure ulcers (PU) and deep tissue injuries (DTI), collectively known as pressure injuries are serious complications causing staggering costs and human suffering with over 200 reported risk factors from many domains. Primary pressure injury prevention seeks to prevent the first incidence, while secondary PU/DTI prevention aims to decrease chronic recurrence. Clinical practice guidelines (CPG) combine evidence-based practice and expert opinion to aid clinicians in the goal of achieving best practices for primary and secondary prevention. The correction of all risk factors can be both overwhelming and impractical to implement in clinical practice. There is a need to develop practical …
Belt-Driven Open Source Circuit Mill Using Low-Cost 3-D Printer Components,
2018
Michigan Technological University
Belt-Driven Open Source Circuit Mill Using Low-Cost 3-D Printer Components, Shane W. Oberloier, Joshua M. Pearce
Department of Materials Science and Engineering Publications
Barriers to inventing electronic devices involve challenges of iterating electronic designs due to long lead times for professional circuit board milling or high costs of commercial milling machines. To overcome these barriers, this study provides open source (OS) designs for a low-cost circuit milling machine. First, design modifications for mechanical and electrical subsystems of the OS Distributed 3-D (D3D) Robotics prototyping system are provided. Next, Copper Carve, an OS custom graphical user interface, is developed to enable circuit board milling by implementing backlash and substrate distortion compensation. The performance of the OS D3D circuit mill is then quantified and validated …
Decoupling Of Multi-Element Mimo Antennas,
2018
Missouri University of Science and Technology
Decoupling Of Multi-Element Mimo Antennas, Min Li, L. (Lijun) J. Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
An efficient decoupling technique for multi-element MIMO antennas is proposed in this paper. A general model of using parasitic decoupling structure (PDS) to satisfy the criterions derived from antenna impedances for perfect isolation is presented. A prototype of three monopole antennas is realized on a Rogers PCB for demonstration purpose. The simulation results show that good impedance matching and high port isolation are achieved simultaneously.
A Survey Of Protocol-Level Challenges And Solutions For Distributed Energy Resource Cyber-Physical Security,
2018
Electrical and Computer Engineering, Florida International University
A Survey Of Protocol-Level Challenges And Solutions For Distributed Energy Resource Cyber-Physical Security, Aditya Sundararajan, Aniket Chavan, Danish Saleem, Arif I. Sarwat
Electrical and Computer Engineering Faculty Publications
The increasing proliferation of distributed energy resources (DERs) on the smart grid has made distributed solar and wind two key contributors to the expanding attack surface of the network; however, there is a lack of proper understanding and enforcement of DER communications security requirements. With vendors employing proprietary methods to mitigate hosts of attacks, the literature currently lacks a clear organization of the protocol-level vulnerabilities, attacks, and solutions mapped to each layer of the logical model such as the OSI stack. To bridge this gap and pave the way for future research by the authors in determining key DER security …
Transistor-Clamped Multilevel H-Bridge Inverter In Si And Sic Hybrid Configuration For High-Efficiency Photovoltaic Applications,
2018
University of Kentucky
Transistor-Clamped Multilevel H-Bridge Inverter In Si And Sic Hybrid Configuration For High-Efficiency Photovoltaic Applications, Yibin Zhang, Jiangbiao He, Sanjeevikumar Padmanaban, Dan M. Ionel
Power and Energy Institute of Kentucky Faculty Publications
Using wide bandgap (WBG) devices has been a promising solution to improve the efficiency of power inverters for photovoltaic (PV) applications. However, for multilevel inverters, using WBG devices to improve the inverter efficiency can increase the system cost dramatically due to the high price of WBG devices in the present market as well as the large number of power devices typically required in multilevel inverter topologies. In this paper, a five-level transistor clamped H-bridge (TCHB) inverter will be further investigated. This inverter requires much lower number of semiconductor switches and fewer isolated dc sources than the conventional cascaded H-bridge inverter. …
Torque Production Capability Of Axial Flux Machines With Single And Double Rotor Configurations,
2018
University of Kentucky
Torque Production Capability Of Axial Flux Machines With Single And Double Rotor Configurations, Narges Taran, Greg Heins, Vandana Rallabandi, Dean Patterson, Dan M. Ionel
Power and Energy Institute of Kentucky Faculty Publications
Axial flux PM (AFPM) machines are used particularly in applications requiring a compact structure. Their disc shape topology and axial air-gap have lead to a variety of configurations including two popular ones: the yokeless and segmented armature (YASA), and the single-stator single-rotor or single sided machine. In this study, a comprehensive comparative analysis of these configurations is conducted at different magnetic and electric loadings. It is found that at lower loadings, typically employed for air-cooled machines, the torque/ampere characteristics of the YASA machine are almost identical to those of a single sided machine constructed with half the magnet volume. On …
Androparse - An Android Feature Extraction Framework & Dataset,
2018
University of New Haven
Androparse - An Android Feature Extraction Framework & Dataset, Robert Schmicker, Frank Breitinger, Ibrahim Baggili
Electrical & Computer Engineering and Computer Science Faculty Publications
Android malware has become a major challenge. As a consequence, practitioners and researchers spend a significant time analyzing Android applications (APK). A common procedure (especially for data scientists) is to extract features such as permissions, APIs or strings which can then be analyzed. Current state of the art tools have three major issues: (1) a single tool cannot extract all the significant features used by scientists and practitioners (2) Current tools are not designed to be extensible and (3) Existing parsers do not have runtime efficiency. Therefore, this work presents AndroParse which is an open-source Android parser written in Golang …
Voltage Effects On Muscarinic Acetylcholine Receptor-Mediated Contractions Of Airway Smooth Muscle,
2018
Old Dominion University
Voltage Effects On Muscarinic Acetylcholine Receptor-Mediated Contractions Of Airway Smooth Muscle, Iurii Semenov, Robert Brenner
Bioelectrics Publications
Studies have shown that the activity of muscarinic receptors and their affinity to agonists are sensitive to membrane potential. It was reported that in airway smooth muscle (ASM) depolarization evoked by high K+ solution increases contractility through direct effects on M3 muscarinic receptors. In this study, we assessed the physiological relevance of voltage sensitivity of muscarinic receptors on ASM contractility. Our findings reveal that depolarization by high K+ solution induces contraction in intact mouse trachea predominantly through activation of acetylcholine release from embedded nerves, and to a lesser extent by direct effects on M3 receptors. We therefore devised …
An Overview Of Direct Current Distribution System Architectures & Benefits,
2018
Missouri University of Science and Technology
An Overview Of Direct Current Distribution System Architectures & Benefits, Venkata Anand Prabhala, Bhanu Prashant Baddipadiga, Poria Fajri, Mehdi Ferdowsi
Electrical and Computer Engineering Faculty Research & Creative Works
This paper examines existing and future direct current (DC) distribution systems with a wide range of applications in data centers, telecommunication systems, commercial buildings, residential homes, electric vehicles, spacecraft, and aircrafts. DC distribution systems have many advantages and disadvantages over their alternating current (AC) counterparts. There are a few surviving examples of DC distribution systems; among them are the telecommunication systems and data centers that use the low-voltage 48 Vdc systems. However, recently, there has been a move towards higher DC bus voltages. In this paper, a comparative study of different DC distribution architectures and bus structures is presented and …
The Study Of Reconfigurable Antennas And Associated Circuitry,
2018
Technological University Dublin
The Study Of Reconfigurable Antennas And Associated Circuitry, Kansheng Yang [Thesis]
Doctoral
This research focuses on the design of pattern reconfigurable antennas and the associated circuitry. The proposed pattern reconfigurable antenna designs benefit from advantages such as maximum pattern diversity and optimum switching circuits to realise 5G reconfigurable antennas. Whereas MIMO based solutions can provide increased channel capacity, they demand high computational capability and power consumption due to multiple channel processing. This prevents their use in many applications most notably in the Internet of Things where power consumption is of key importance. A switched-beam diversity allows an energy-efficient solution improving the link budget even for small low-cost battery operated IoT/sensor network applications. …
Accurate Flexible Refinement Of Atomic Models Against Medium-Resolution Cryo-Em Maps Using Damped Dynamics,
2018
Old Dominion University
Accurate Flexible Refinement Of Atomic Models Against Medium-Resolution Cryo-Em Maps Using Damped Dynamics, Julio A. Kovacs, Vitold E. Galkin, Willy Wriggers
Mechanical & Aerospace Engineering Faculty Publications
Background: Dramatic progress has recently been made in cryo-electron microscopy technologies, which now make possible the reconstruction of a growing number of biomolecular structures to near-atomic resolution. However, the need persists for fitting and refinement approaches that address those cases that require modeling assistance.
Methods: In this paper, we describe algorithms to optimize the performance of such medium-resolution refinement methods. These algorithms aim to automatically optimize the parameters that define the density shape of the flexibly fitted model, as well as the time-dependent damper cutoff distance. Atomic distance constraints can be prescribed for cases where extra containment of parts of …
Interference Mitigating Satellite Broadcast Receiver Using Reduced Complexity List-Based Detection In Correlated Noise,
2018
Space Research Center at the University of New South Wales (UNSW)
Interference Mitigating Satellite Broadcast Receiver Using Reduced Complexity List-Based Detection In Correlated Noise, Zohair Abu-Shaban, Hani Mehrpouyan, Bhavani Shankar M.R., Björn Ottersten
Electrical and Computer Engineering Faculty Publications and Presentations
The recent commercial trends towards using smaller dish antennas for satellite receivers, and the growing density of broadcasting satellites, necessitate the application of robust adjacent satellite interference (ASI) cancellation schemes. This orbital density growth along with the wider beamwidth of a smaller dish have imposed an overloaded scenario at the satellite receiver, where the number of transmitting satellites exceeds the number of receiving elements at the dish antenna. To ensure successful operation in this practical scenario, we propose a satellite receiver that enhances signal detection from the desired satellite by mitigating the interference from neighboring satellites. Towards this objective, we …
Two Channel Sdm Communication System Simultaneously Operating At 10gb/S Using C-Band Transceivers,
2018
Florida Institute of Technology
Two Channel Sdm Communication System Simultaneously Operating At 10gb/S Using C-Band Transceivers, Han Wang
Theses and Dissertations
Increasing the bandwidth of optical fiber communications to cope with high-speed network traffic is an important goal for the communications industry. Therefore, optical communication is growing at a very rapid pace, including the multiplexing technology. Spatial domain multiplexing (SDM), also known as Space division multiplexing, is a Multi-Input Multi-Output (MIMO) architecture that can increase the data carrying capacity of optical fibers by multiple folds. SDM allows multiple channels of same wavelength to be transmitted in parallel over standard multi-mode fibers, where each SDM channel follows a different helical trajectory while traversing the length of the fiber that lead to unique …
Moderate Heat Application Enhances The Efficacy Of Nanosecond Pulse Stimulation For The Treatment Of Squamous Cell Carcinoma,
2018
Old Dominion University
Moderate Heat Application Enhances The Efficacy Of Nanosecond Pulse Stimulation For The Treatment Of Squamous Cell Carcinoma, Chelsea M. Edelblute, Sigi Guo, Embo Yang, Chunqi Jiang, Karl Schoenbach, Richard Heller
Bioelectrics Publications
Nanosecond pulse stimulation as a tumor ablation therapy has been studied for the treatment of various carcinomas in animal models and has shown a significant survival benefit. In the current study, we found that moderate heating at 43°C for 2 minutes significantly enhanced in vitro nanosecond pulse stimulation-induced cell death of KLN205 murine squamous cell carcinoma cells by 2.43-fold at 600 V and by 2.32-fold at 900 V, as evidenced by propidium iodide uptake. Furthermore, the ablation zone in KLN205 cells placed in a 3-dimensional cell-culture model and pulsed at a voltage of 900 V at 43°C was 3 times …
Non-Destructive Characterization Of Rotated Uniaxial Anisotropic Materials,
2018
Air Force Institute of Technology
Non-Destructive Characterization Of Rotated Uniaxial Anisotropic Materials, Alexander G. Knisely
Theses and Dissertations
Electromagnetic material characterization of anisotropic media requires measurement diversity, minimal measurement uncertainty and insight into sample symmetry. Additionally, non-destructive characterization techniques are valued over legacy measurement techniques because a destructive approach requires sample preparation to execute a measurement. A Single Port Waveguide Probe (SPWP) non-destructive material characterization technique is proposed to accommodate measuring a metal backed, known thickness, rotated uniaxial anisotropic material. A rotated uniaxial sample possesses unique transverse constitutive components and a longitudinal constitutive component which is the same as one of the transverse values. The SPWP consists of a rectangular waveguide aperture cut in the center of a …
