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2010 ASEE Annual Conference and Exposition

作者： Kaiser, Todd Taylor, Peggy Plumb, Carolyn Tenenbaum, Howard Hodges, Seth Department of Electrical and Computer Engineering Montana State University United States Program Montana State University United States Educational Innovation and Strategic Projects College of Engineering Montana State University United States La Jolla High School United States St. Michael Indian School St. Michaels AZ United States

An engineering course was developed for the Masters of Science in Science Education program.that introduces science teachers to the concepts necessary to understand the principles governing the operation of silicon solar cells. The summer course stresses that engineering is applied science and uses multi-disciplinary understanding of the physical sciences to understand, develop, and fabricate solar cells. The teachers went into the clean room and completed the processing steps to produce functional solar cells, then they tested and characterized them. The teachers left with a souvenir wafer and course material that aided them in the introduction of subject matter into their curricula. program.assessment was conducted and course outcomes measured through teacher surveys. © American Society for engineering Education, 2010.

关键词： Silicon solar cells

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A portable, inexpensive, wireless vital signs monitoring system

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Biomedical Instrumentation and Technology 2010年第4期44卷 350-353页

作者： Kaputa, David Price, David Enderle, John D. Biomedical Engineering University of Connecticut Storrs CT United States Abiomed Danvers MA United States Biomedical Engineering Program Department of Electrical and Computer Engineering University of Connecticut United States

The University of Connecticut, department of Biomedical engineering has developed a device to be used by patients to collect physiological data outside of a medical facility. This device facilitates modes of data collection that would be expensive, inconvenient, or impossible to obtain by traditional means within the medical facility. Data can be collected on specific days, at specific times, during specific activities, or while traveling. The device uses biosensors to obtain information such as pulse oximetry (SpO2), heart rate, electrocardiogram (ECG), non-invasive blood pressure (NIBP), and weight which are sent via Bluetooth to an interactive monitoring device. The data can then be downloaded to an electronic storage device or transmitted to a company server, physician's office, or hospital. The data collection software is usable on any computer device with Bluetooth capability, thereby removing the need for special hardware for the monitoring device and reducing the total cost of the system. The modular biosensors can be added or removed as needed without changing the monitoring device software. The user is prompted by easy-to-follow instructions written in non-technical language. Additional features, such as screens with large buttons and large text, allow for use by those with limited vision or limited motor skills.

关键词： Blood pressure

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NIRS based brain activation mapping: A real-time application

NIRS based brain activation mapping: A real-time application

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International Conference on Control, Automation and Systems ( ICCAS)

作者： Xiao-Su Hu Keum-Shik Hong Shuzhi Sam Ge Department of Cogno-Mechatronics Engineering (W.C.U. program) Pusan National University Busan South Korea Department of Electrical & Computer Engineering National University of Singapore Singapore

Near-infrared spectroscopy (NIRS) is a non-invasive neuroimaging technique that recently has been used to measure changes in cerebral blood oxygenation associated with brain activity. To date, there is no standard method for analyzing NIRS data, especially for real-time brain imaging applications. In this work, a novel real-time NIRS signal analysis framework based on the general linear model (GLM) and the Kalman estimator was devised. A set of simulated data was processed using the proposed framework. The results so obtained suggested that the method can effectively locate brain activation areas in real-time, thereby demonstrating its potential for real-time NIRS-based brain imaging applications.

关键词： Real time systems Noise Kalman filters Brain models Mathematical model

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CALE: A Context-Aware Living Environment Based on Zigbee Sensor Network

CALE: A Context-Aware Living Environment Based on Zigbee Sen...

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International Conference on Mobile Ad-hoc and Sensor Networks, MSN

作者： Kun-Ming Yu Jian-Yuan Liou Bo-Han Yeh Chang Wu Yu Ching-Cheng Tien Chih-Hu Wang Ping-Yu Wang Department of Computer Science and Information Engineering Chung Hua University Taiwan Program of Technology Management Chung Hua University Taiwan Department of Electrical Engineering Chung Hua University Taiwan

The paper employed some independently developed sensors based on the Octopus X platform to build a Zigbee-based Sensor Networks. Also, we implemented a Location-aware living environment by deploying the developed Zigee-based sensor. Besides, through the created window console interface, the sensed data can be transmitted and transformed to the database for further utilized. Moreover, by the devised Web interface, the update request data can be observed efficiently and responded effectively to any situations.

关键词： Zigbee Wireless sensor networks Software Hardware Wireless communication Databases Temperature sensors

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Modeling of Interference from Cooperative Cognitive Radios for Low Power Primary Users

Modeling of Interference from Cooperative Cognitive Radios f...

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2010 IEEE Global Telecommunications Conference GLOBECOM 2010

作者： Prasanna Madhusudhanan Juan G. Restrepo Youjian Liu Timothy X. Brown Kenneth Baker Department of Electrical Computer and Energy Engineering University of Colorado Boulder CO USA Department of Applied Mathematics University of Colorado Boulder CO USA Department of Electrical Computer and Energy Engineering Interdisciplinary Telecommunications Program University of Colorado Boulder CO USA Interdisciplinary Telecommunications Program University of Colorado Boulder CO USA

Cognitive radios (CR) must ensure that their transmissions do not cause harmful interference to the primary users that operate in the same band. Primary users with short communication range transmitters, such as wireless microphone systems, are considered. The CR network is distributed according to a Poisson process. The CRs detect the primary user either through primary transmitter signals or through beacons collocated with the primary receiver. Three levels of cooperative sensing by CRs are analyzed, namely, no cooperation, full cooperation and partial cooperation. The characteristic function of the interference at the primary receiver for all combinations of primary user detection and cooperative sensing schemes are derived for the system modeled along a line (1-D) and about a plane (2-D). The analysis in 1-D corresponds to a highway scenario and 2-D corresponds to a planar system. The carrier-to-interference ratio (C/I) at the primary receiver is evaluated using the characteristic function. The analysis clearly shows the need for cooperative spectrum sensing when the density of the CRs is high. It is shown that the effect of shadowing, small scale fading, and power control at the CRs can be captured into the density of the CR network. The results hold for the CRs that are wide-band devices as well as narrow-band devices.

关键词： Interference Microphones Wireless communication Wireless sensor networks Sensors Reliability Random variables

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Error-rate performance analysis of incremental decode-and-forward opportunistic relaying

Error-rate performance analysis of incremental decode-and-fo...

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International Conference on Communication in Wireless Environments and Ubiquitous Systems: New Challenges (ICWUS)

作者： Kamel Tourki Hong-Chuan Yang Mohamed-Slim Alouini ECEN Program Texas A and M University Qatar Doha Qatar Department of Electrical and Computer Engineering University of Victoria Victoria BC Canada

In this paper, we investigate an incremental opportunistic relaying scheme where the selected relay chooses to cooperate only if the source-destination channel is of an unacceptable quality. In our study, we consider regenerative relaying in which the decision to cooperate is based on a signal-to-noise ratio (SNR) threshold and takes into account the effect of the possible erroneously detected and transmitted data at the best relay. We derive a closed-form expression for the end-to-end bit-error rate (BER) of binary phase-shift keying (BPSK) modulation based on the exact probability density function (PDF) of each hop. Furthermore, we evaluate the asymptotic error performance and the diversity order is deduced. We show that performance simulation results coincide with our analytical results.

关键词： Relays Signal to noise ratio Probability density function Wireless communication Fading Protocols Bit error rate

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Design of a configurable neural Data compression system for intra-cortical implants

Design of a configurable neural Data compression system for ...

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Awais M. Kamboh Yuning Yang Karim G. Oweiss Andrew J. Mason Department of Electrical and Computer Engineering East Lansing MI USA Neuroscience Program Michigan State University East Lansing MI USA

Multi-channel neural signal recordings need high data compression and efficient data transmission. Our previous work has shown a practical data compression solution based on discrete wavelet transform, multi-level thresholding and run length encoding. This paper presents a custom designed communication protocol for bidirectional data telemetry to and from the implanted module. A global controller is also presented which configures, operates and unites all the modules together effectively and efficiently into a 32-channel system. Performance of the communication protocol and the compression engine is analyzed.

关键词： Data compression Implants Discrete wavelet transforms Protocols Data communication Encoding Telemetry Communication system control Control systems Engines

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Wafer bonding technique based GaN/Quantum Dots/GaN system

Wafer bonding technique based GaN/Quantum Dots/GaN system

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IEEE Southeastcon

作者： Ying Li Edward Stokes Optical Science and Engineering Program University of North Carolina Charlotte Charlotte NC USA Department of Electrical and Computer Engineering University of North Carolina Charlotte Charlotte NC USA

ISBN: (纸本)9781424458547

Integration of colloidal semiconductor quantum dots with epitaxial semiconductor materials offers the possibility of a wide variety of new device structures. In this work, wafer bonding processes for layered GaN/Quantum Dots/GaN structures are described. Bonding is achieved by thermal reorganization of bidentate ligand thiophenethiol which initially caps the CdSe/ZnS core/shell quantum dots. Annealing temperature dependent bond strength feature is characterized. Maximum bond strength is achieved after annealing at 350°C. Effect of annealing on quantum dot photoluminescence is also investigated.

关键词： Gallium nitride Wafer bonding Quantum dots

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Friction feedforward compensation and position feedforward in CNC machines

Friction feedforward compensation and position feedforward i...

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7th Annual International Conference on electrical engineering/Electronics, computer, Telecommunications and Information Technology, ECTI-CON 2010

作者： Suteeratanapirom, Wijin Rattanawaorahirankul, Rapeepong Laosapan, Chutima Sanposh, Peerayot Chayopitak, Nattapon Tungpimolrut, Kanokvate Kunieda, Hiroaki TAIST Tokyo Tech ICTES Program Department of Electrical Engineering Kasetsart University 50 Phahonyothin Rd. Ladyao Jatujak Bangkok 10903 Thailand Intelligent Mechatronics Automation Robotics and Control Laboratory Department of Electrical Engineering Kasetsart University 50 Phahonyothin Rd. Ladyao Jatujak Bangkok 10903 Thailand Industrial Control and Automation Laboratory National Electronics and Computer Technology Center 112 Thailand Science Park Phahonyothin Rd. Klong 1 Klong Luang Pathumthani 12120 Thailand Department of Electrical and Electronic Engineering Tokyo Institute of Technology S3-65 2-12-1 Ookayama Meguro-ku Tokyo 152-8550 Japan

ISBN: (纸本)9789746724913

This research proposes a method to eliminate friction effect and reduced tracking error on CNC milling machines. A CNC milling machine has many connected mechanical components which have friction effects such as ball screws and rails. To control servo motors which are used to drive X-Y table in CNC milling machine, the conventional PID controller is widely used. In this research, Panasonic motor driver is set to the torque control mode. To compensate the friction effects, the friction feedforward compensation method is proposed. Moreover, to reduce the position tracking error, position feedforward controller is used. The simulation and implementation of position control in one axis of PID with Friction Feedforward Compensation and Position Feedforward Controller (FFC-PFC) are presented.

关键词： Friction

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KRONECKER PRODUCT MATRICES FOR COMPRESSIVE SENSING

KRONECKER PRODUCT MATRICES FOR COMPRESSIVE SENSING

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IEEE International Conference on Acoustics, Speech, and Signal Processing

作者： Marco F. Duarte Richard G. Baraniuk Program in Applied and Computational Mathematics Princeton University Princeton NJ 08544 Department of Electrical and Computer Engineering Rice University Houston TX 77005

ISBN: (纸本)9781424442959

Compressive sensing (CS) is an emerging approach for acquisition of signals having a sparse or compressible representation in some basis. While CS literature has mostly focused on problems involving 1-D and 2-D signals, many important applications involve signals that are multidimensional. We propose the use of Kronecker product matrices in CS for two purposes. First, we can use such matrices as sparsifying bases that jointly model the different types of structure present in the signal. Second, the measurement matrices used in distributed measurement settings can be easily expressed as Kronecker products. This new formulation enables the derivation of analytical bounds for sparse approximation and CS recovery of multidimensional signals.

关键词： Data compression multidimensional signal processing signal reconstruction

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