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IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia)

作者： A. M. Shiddiq Yunus A. Abu-Siada M. A. S. Masoum Department of Mechanical Engineering Energy Conversion Study Program State of Polytechnic Ujung Pandang Makassar Indonesia Department of Electrical and Computer Engineering Curtin University of Technology Perth WA Australia

The amount of wind turbine connected to the power grid has significantly increased during the last decade. This has resulted in essential need to establish grid codes. Previously, wind turbine generators (WTGs) were allowed to be disconnected from the network during any disturbance at the grid side to avoid WTGs from being damaged. However, lately, the transmission system operators (TSOs) require WTGs to be stayed connected to provide support to the grid during fault. This new requirement has been regulated in the new grid codes. In this paper, the super conducting magnetic energy storage (SMES) unit is used to enhance the high voltage ride through (HVRT) capability of DFIG based WTG during voltage swell events at the grid side. Two new grid codes are used to verify the ability of the SMES unit to avoid the WTG from being disconnected from the grid.

关键词： Coils Wind turbines Fuzzy logic Generators Reactive power Input variables Voltage fluctuations

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SOI TFET $I_{\rm ON}/I_{\rm OFF}$ Enhancement via Back Biasing

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IEEE Transactions on Electron Devices 2011年第10期58卷 3283-3285页

作者： Alex Guo Peter Matheu Tsu-Jae King Liu University of California Berkeley CA USA Applied Science & Technology Graduate Program University of California Berkeley CA USA Department of Electrical Engineering and Computer Sciences University of California Berkeley CA USA

The effect of back biasing on the performance of a planar tunnel field-effect transistor (TFET) implemented on a silicon-on-insulator substrate is investigated. It is found that reverse back biasing reduces the subthreshold swing SS and increases the range of drain current over which SS is less than ( k B T / q ) ln (10); hence, it is effective for improving the TFET on/off current ratio for low operating voltages (≤ 0.5 V).

关键词： Logic gates Tunneling Doping Transistors Silicon Photonic band gap Junctions

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Responses of human fetal mesenchymal stem cells to various poly(Ε-caprolactone) films: A comparison study

Responses of human fetal mesenchymal stem cells to various p...

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2011 Defense Science Research Conference and Expo, DSR 2011

作者： Wang, Zu-Yong Jing, Lim Zhang, Qin-Yuan Teo, Erin Y. Chan, Jerry Hong, Ming-Hui Wen, Feng Teoh, Swee-Hin Department of Mechanical Engineering National University of Singapore Singapore Department of Obstetrics and Gynaecology National University of Singapore Singapore Department of Reproductive Medicine KK Women's and Children's Hospital Singapore Cancer and Stem Cell Biology Program Duke-NUS Graduate Medical School Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore School of Material Science and Engineering Nanyang Technology University Singapore National University of Singapore Singapore

ISBN: (纸本)9781424492763

Poly(Ε-caprolactone) (PCL) films have been applied for vascular tissue engineering. However, few studies studied the effects of fabrication process of PCL film on vascular cell proliferation. In this study, we used different processing methods, incorporating stretching, to fabricate various PCL films. Thickness of films before and after stretch and proliferation ability of human fetal mesenchymal stem cells (hfMSCs) on these films were investigated. Our results showed that stretching significantly reduces the thickness of solvent cast, heat press and cast stretch films (0.22, 0.59, 0.60, p

关键词： Cell proliferation

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Application of STATCOM to improve the high-voltage-ride-through capability of wind turbine generator

Application of STATCOM to improve the high-voltage-ride-thro...

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IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia)

作者： Y. M. Alharbi A. M. Shiddiq Yunus A. Abu-Siada King Abdullah scholarship program Australia Department of Mechanical Engineering Energy Conversion Study State Polytechnic of Ujungpandang Makassar Indonesia Department of Electrical and Computer Engineering Curtin University of Technology Perth WA Australia

Variable speed wind turbine with full scale converter or so-called type-D wind turbine generator worldwide installation has been significantly increased in the last few years. Voltage Swell in the grid side may cause the wind turbine to be disconnected from the grid. In this paper, STATCOM is applied to improve the high voltage ride through capability of type-D wind turbine during voltage swell in the grid side. Simulation is carried out using MATLAB/Simulink software. Results show that STATCOM can significantly improve the high voltage ride through (HVRT) capability of type-D wind turbine and prevents it from being disconnected from the grid during certain level of voltage swell in the grid side.

关键词： Automatic voltage control Wind turbines Educational institutions Reactive power Control systems Power system stability Wind energy

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A parallel architecture for ray-tracing with an embedded intersection algorithm

A parallel architecture for ray-tracing with an embedded int...

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Alexandre S. Nery Nadia Nedjah Felipe M.G. França Lech Jozwiak LAM-Computer Architecture and Microelectronics Laboratory Systems Engineering and Computer Science Program COPPE Universidade Federal do Rio de Janeiro Brazil Department of Electrical Engineering-Electronic Systems Eindhovan University of Technology Netherlands Department of Electronics Engineering and Telecommunications-Faculty of Engineering Universidade do Estado do Rio de Janeiro (UERJ) Brazil

Real time rendering of three-dimensional scenes in Ray Tracing is a hard problem. However, parallel implementations have been enabling real time performance, as the algorithm can be highly parallelized. Thus, a custom parallel design in hardware is likely to achieve a good performance. In this paper, we further improve the GridRT architecture overall performance by embedding the ray-triangle intersection computation into the precessing elements that form the architecture. Low cost and high rendering performance are the main concerns in this novel design. The results show that the execution time of each intersection computation is reduced by at least 50%, while the area cost is practically unchanged or even reduced when compared to the original GridRT implementation.

关键词： Ray tracing Registers Equations USA Councils Mathematical model Parallel architectures

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Work in progress — Merging science inquiry and engineering design: A summer workshop series for middle and high school science teachers

Work in progress — Merging science inquiry and engineering ...

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Frontiers in Education (FIE) Conference

作者： Patricia Carlson Peter Hylton Michael Robinson Renee Rogge Justin Shearer Maarij Syed Deborah Walter The PRISM Program Rose-Hulamn Institute of Technology USA Mechanical Engineering Technology Indiana University Purdue University Indianapolis USA Civil and Environmental Engineering Rose-Hulamn Institute of Technology USA Applied Biology and Biomedical Engineering Rose-Hulamn Institute of Technology USA Chemistry and Biochemistry Rose-Hulamn Institute of Technology USA Physics and Optical Engineering Rose-Hulamn Institute of Technology USA Electrical and Computer Engineering Rose-Hulamn Institute of Technology USA

We report on a two-week professional development workshop for middle and high school science teachers offered as part of a three-year Indiana Department of Education Math-Science Partnership grant awarded to Rose-Hulm... 详细信息

关键词： Conferences Materials Educational institutions engineering education Standards Adaptation models

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A novel technique for localized formation of SOI active regions

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Physica Status Solidi (C) Current Topics in Solid State Physics 2011年第6期8卷 1865-1868页

作者： Veeramachaneni, Bharat Winans, Joshua D. Hu, Shaoting Kawamura, Daiji Fauchet, Philippe M. Witt, Kevin Hirschman, Karl D. Semitool Inc. Kalispell MT United States Materials Science Program University of Rochester Rochester NY United States Department of Microelectronic Engineering Rochester Institute of Technology Rochester NY United States Department of Electrical and Computer Engineering University of Rochester Rochester NY United States

In this work we study the role of fluorine for the selective suppression of porous silicon in localized SOI applications. The formation of porous silicon can be done selectively by controlling the Fermi level in areas to be etched or not etched, which is typically done by adjusting the level of doping. Implanted fluorine in silicon has demonstrated a donor effect upon annealing at low temperature (600 °C), which is reversible as the fluorine outdiffuses during higher temperature annealing (1100 °C). The investigated technique has been used to form crystalline silicon active regions with thickness less than 200 nm completely surrounded by oxidized porous silicon. The electronic integrity of the active area has also been established through nMOS transistor fabrication and characterization. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

关键词： Thin film transistors

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Evaluation of a Closed Loop Inductive Power Transmission System on an Awake Behaving Animal Subject

Evaluation of a Closed Loop Inductive Power Transmission Sys...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Mehdi Kiani Ki Yong Kwon Fei Zhang Karim Oweiss Maysam Ghovanloo GT-Bionics Lab School of Electrical and Computer Engineering at Georgia Institute of Technology Neural Systems Engineering Lab ECE Dept. College of Eng. at Michigan State University ECE Dept. and Neuroscience Program at Michigan State University

ISBN: (纸本)9781424441211

This paper presents in vivo experimental results for a closed loop wireless power transmission system to implantable devices on an awake behaving animal subject. In this system, wireless power transmission takes place across an inductive link, controlled by a commercial off-the-shelf (COTS) radio frequency identification (RFID) transceiver (TRF7960) operating at 13.56 MHz. Induced voltage on the implantable secondary coil is rectified, digitized by a 10-bit analog to digital converter, and transmitted back to the primary via back telemetry. Transmitter (Tx) and receiver (Rx) circuitry were mounted on the back of an adult rat with a nominal distance of ～7 mm between their coils. Our experiments showed that the closed loop system was able to maintain the Rx supply voltage at the designated 3.8 V despite changes in the coils' relative distance and alignment due to animal movements. The Tx power consumption changed between 410 ～ 560 mW in order to deliver 27 mW to the receiver. The open loop system, on the other hand, showed undesired changes in the Rx supply voltage while the Tx power consumption was constant at 660 mW.

关键词： Coils Inductive power transmission Closed loop systems awake Induction loop systems analog digital converter supply voltage Power consumption Implants and Prostheses Contraceptive Coil Radio frequency identification Back Open loop systems Digitizers

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Sensor placement for activity recognition: Comparing video data with motion sensor data

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International Journal of Circuits, Systems and Signal Processing 2011年第3期5卷 279-286页

作者： Yanik, Paul M. Merino, Jessica Manganelli, Joe Smolentzov, Linnea Walker, Ian D. Brooks, Johnell O. Green, Keith E. Electrical and Computer Engineering Technology Western Carolina University Cullowhee NC United States Intelligent Systems Clemson University Clemson SC United States Auburn University United States Human Factors Program Clemson University Clemson SC United States Department of Psychology Clemson University Clemson SC United States Architecture and Electrical and Computer Engineering Institute for Intelligent Materials Systems and Environments Clemson University United States

The development of ubiquitous sensing strategies in home environments underpins the promise of adaptive architectural design, assistive robotics, and services which would support a person's ability to live independently as they age. In particular, the ability to infer the actions and behavioral patterns of an individual from sensor data is key to effective design of such components for aging in place. Frequently, activity recognition is accomplished using vision based sensors. The method employed in this paper makes use of self similarities in a video motion sequence to construct a descriptor of the activity in the form of a Histogram of Oriented Gradients (HOG). Descriptors are used as exemplars for classification and are shown to accurately identify motion video recorded from other views. Three candidate motions were performed using a PUMA robot (for repeatability). Video of each motion was recorded from an array of vantage points on the surface of a virtual sphere surrounding the workspace of the robot. This method is then extended to non-video motion sensor data collected from the same set of points. Results show that mean HOGs generated from Self Similarity Matrices may serve as effective exemplars to classify motions in both video and non-video formats. Video data provides superior classification results. However, motion sensor data offers a less intrusive option with promising accuracy especially when multiple sensors outputs are fused to form aggregate readings.

关键词： Video recording

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Microfluidic flow cytometer utilizing optical space-time coding technique

Microfluidic flow cytometer utilizing optical space-time cod...

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IEEE Photonics Conference (IPC)

作者： Tsung-Feng Wu Zhe Mei Luca Pion-Tonachini Yu-Hwa Lo Materials Science and Engineering Program University of California at San Diego La Jolla CA USA School of Information and Electronics Beijing Institute of Technology Beijing China Department of Electrical and Computer Engineering University of California at San Diego La Jolla CA USA

An optical-coding technique for microfluidic flow cytometers to detect forward scattering and large angle scattering signals that can be used to differentiate beads and cells.

关键词： Optical scattering Microfluidics Optical sensors Optical signal processing Optical device fabrication Biomedical optical imaging

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