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2009 IEEE Global Telecommunications Conference, GLOBECOM 2009

作者： Lin, Hui-Tang Lin, Ying-You Chang, Wang-Rong Chen, Song-Ming Institute of Computer and Communication Engineering National Cheng Kung University Taiwan Department of Electrical Engineering National Cheng Kung University Taiwan ICT-Enabled Healthcare Program Industrial Technology Research Institute-South Taiwan

ISBN: (纸本)9781424441488

An integrated EPON/WiMAX network has been an attractive attention due to its features of achieving stable backhaul transmissions to WiMAX users and reducing the expenditure of network deployment. In implementing such a network, realizing a scheduling mechanism capable of sharing the available bandwidth between the heterogeneous Ethernet and WiMAX traffic in an effective manner is problematic. In the present study, this problem is addressed by using a game-theoretic-based scheme comprising a bankruptcy game and a bargaining game to perform an intra-ONU scheduling function at each ONU within the network. In the proposed approach, each ONU distributes the total amount of bandwidth allocated by the OLT between the Ethernet and WiMAX traffic buffers in accordance with the results of the bankruptcy game. By applying bargaining games, the allocated bandwidth is then further distributed to the different traffic classes within the Ethernet or WiMAX traffic in accordance with their QoS requirements. The simulation results confirm the validity and effectiveness of the proposed approach.

关键词： Ethernet

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Measuring the impact of undergraduate research programs on engineering students' attitudes toward graduate studies

Measuring the impact of undergraduate research programs on e...

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2009 ASEE Annual Conference and Exposition

作者： Hirsch, Linda Carpinelli, John Kimmel, Howard Perna, Angelo Narh, Kwabena Center for Pre-College Programs New Jersey Institute of Technology United States Department of Electrical and Computer Engineering Department of Chemical Engineering Department of Chemical and Environmental Engineering Ronald E. McNair Program New Jersey Institute of Technology United States Mechanical Engineering Department New Jersey Institute of Technology United States

Attitudes toward graduate studies are an often overlooked, but potentially important factor in undergraduate engineering students' decisions of whether or not to pursue graduate studies in engineering. Graduate work, especially the Ph.D., requires extensive research, a skill not often emphasized in undergraduate engineering programs. A survey was developed to measure engineering students' attitudes toward graduate studies and examine the reasons students choose to not attend graduate school. The psychometric properties of the survey have been examined and are published elsewhere. The survey has been used to measure the effect(s) undergraduate research programs have on engineering students' attitudes toward graduate studies. Students who participated in the research programs showed increased attitudes from the beginning to the end of their programs and had significantly higher attitudes toward graduate studies than a group of students who did not participate in the programs. Research opportunities for undergraduates have expanded over the past several years with the initiation of federally funded programs such as Research Experiences for Undergraduates (REU) and the Ronald E. McNair Post-baccalaureate Achievement program. During each of the last three years, New Jersey Institute of Technology has hosted two separate REUs as well as a McNair program. Data across all three years have been combined to further examine changes in students' attitudes toward graduate studies after participating in one of the programs and to begin investigating possible differences between the students who attended the REU programs and the students who attended the McNair program. Students in the Ronald E. McNair Postbaccalaureate Achievement program showed significantly higher attitudes toward graduate studies, were more positive about research and appeared more likely to pursue careers in academia. © American Society for engineering Education, 2009.

关键词： Students

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Fiber-to-bundle registration of white matter tracts

Fiber-to-bundle registration of white matter tracts

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Medical Imaging 2009 - Image Processing

作者： Xu, Qing Anderson, Adam W. Gore, John C. Ding, Zhaohua Vanderbilt University Institute of Imaging Science United States Department of Electrical Engineering and Computer Science Vanderbilt University United States Department of Biomedical Engineering Vanderbilt University United States Chemical and Physical Biology Program Vanderbilt University United States

ISBN: (纸本)9780819475107

Magnetic resonance diffusion tensor imaging (DTI) is being widely used to reconstruct brain white matter (WM) fiber tracts. For further characterization of the tracts, the fibers with similar courses often need to be grouped into a fiber bundle that corresponds to certain underlying WM anatomic structure. In addition, the alignments of fibers from different studies are often desirable for bundle comparisons and group analysis. In this work, a novel registration algorithm based on fiber-to-bundle matching was proposed to address the above two needs. Using an Expectation Maximization (EM) algorithm, the proposed method is capable of estimating a Thin-Plate- Spline transformation that optimally aligns whole-brain target fiber sets with a reference bundle model. Based on the resulting transformations, the fibers from different target datasets can all be warped into the reference coordinate system for comparisons and group analysis. The fibers can be further automatically labeled according to their similarity to the reference model. The algorithm was evaluated with eight human brain DTI data volumes acquired in vivo at 3T. After registration, the warped target bundles exhibit good similarity to the reference bundles. Quantitative experiments further demonstrated that the detected target bundles agree with ground truth obtained by manual segmentation at a sub-voxel accuracy. © 2009 Copyright SPIE - The International Society for Optical engineering.

关键词： Fibers

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Autonomous microfluidic sensing device employing liquid crystal for detection of biological interactions

Autonomous microfluidic sensing device employing liquid crys...

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TRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems

作者： Cheng, D. Lin, I.H. Abbott, N.L. Jiang, H. Materials Science Program University of Wisconsin-Madison Madison WI United States Department of Chemical and Biological Engineering University of Wisconsin-Madison Madison WI United States Department of Electrical and Computer Engineering University of Wisconsin-Madison Madison WI United States

ISBN: (纸本)9781424441938

We report the design of an autonomous sensing device, which employs a thermotropic nematic liquid crystal (LC) to conduct chemical or biological sensing tasks. The development of highly reproducible methods to create uniform LC thin film is critical for utilizing LCs for sensing. Herein, we describe the use of shear forces generated by the laminar flow of liquid within a microfluidic channel to create thin LC films stabilized within microfabricated structures. The orientational response of the supported LC films to targeted analytes in aqueous phases was observed through changes in the optical birefringence of the LC thin films. Experiments employing two systems are reported: (i) dodecyl trimethylammonium bromide (DTAB) dissolved in aqueous solution, and (ii) the hydrolysis of phospholipids by the enzyme phospholipase A2 (PLA2). ©2009 IEEE.

关键词： Phospholipids

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Use of a step-response approximation for thermal transient modeling in power MOSFETs

Use of a step-response approximation for thermal transient m...

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74th ARFTG Microwave Measurement Conference - System Modeling and Measurement for High Accuracy Verification

作者： Baylis, Charles Perry, Joseph Moldovan, Matthew Marks II, Robert J. Dunleavy, Lawrence Wireless and Microwave Circuits and Systems Program Department of Electrical and Computer Engineering Baylor University Waco TX 76798 United States Center for Wireless and Microwave Information Systems Department of Electrical Engineering University of South Florida Tampa FL 33620 United States Modelithics Inc. Tampa FL 33612 United States

ISBN: (纸本)9781424457137

In a previous ARFTG paper, we presented the measurement of the thermally-induced transient drain voltage response of a power Si MOSFET to a step excitation in gate voltage. The data was fit by assuming the drain voltage takes an exponential shape. This relies on the assumption that the drain current is a step function, which is actually only approximate due to the dependence of the drain current on temperature. In this work, we show that the exponential approximation actually possesses the same asymptotic behavior of a more accurate, model-based solution we have obtained that incorporates thermal feedback. We show that the more theoretically accurate solution and exponential approximation of the solution both provide excellent fits to measured data for the Si MOSFET. © 2009 IEEE.

关键词： Power MOSFET

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The AMALTHEA REU program: Activities, experiences & outcomes of a collaborative summer research experience in machine learning

The AMALTHEA REU Program: Activities, experiences & outcomes...

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2009 ASEE Annual Conference and Exposition

作者： Anagnostopoulos, Georgios Georgiopoulos, Michael Kepuska, Veton Stanley, Kenneth Morrison-Shetlar, Alison Lancey, Pat Krist, Paula Crouse, Tace Electrical and Computer Engineering Department Florida Institute of Technology Melbourne FL United States AMALTHEA REU Program United States University of Central Florida United States School of EECS School of Electrical Engineering and Computer Science University of Central Florida United States Department of Biology University of Central Florida United States School of Leadership and Education Sciences University of San Diego United States

The AMALTHEA REU program is a 10-week, summer research experience for science or engineering undergraduate students funded by the National Science Foundation since 2007 and featuring Machine Learning as its intellectual focus. Moreover, it is a joint effort of two collaborating universities in Central Florida, namely Florida Institute of Technology in Melbourne and University of Central Florida in Orlando. Organizing, implementing and directing REU Sites is typically perceived as a demanding effort;while offering unique advantages, operating collaborative sites may impose an additional layer of challenges. In this paper our intention is to present the objectives of our program, its unique characteristics, and the structure and organization of our collaborative site. Furthermore, we would like to give an informative account of our activities across the various aspects of the program, such as marketing of the experience, recruiting of student participants, the summer experience itself and our dissemination efforts. Finally, we report on our outcomes accomplished so far, which include research products and evaluation results. While our program is only entering into its third year of operation, we do hope that, by sharing our experiences and promising strategies to date, we will encourage and aid prospective REU Site directors to successfully plan for and operate collaborative sites. © American Society for engineering Education, 2009.

关键词： Students

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Editorial: Statistical signal processing in neuroscience

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Eurasip Journal on Advances in Signal Processing 2009年 2009卷

作者： Oweiss, Karim G. Principe, Jose C. Johnson, Don H. Department of Electrical and Computer Engineering Neuroscience Program Michigan State University MI 48824-1226 United States Electrical and Biomedical Engineering University of Florida FL 32611-6550 United States Department of Electrical and Computer Engineering Rice University TX 77005-1892 United States

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Determination of thermal parameters of nanostructures exhibiting one-dimensional heat flow through a thermal transient method

Determination of thermal parameters of nanostructures exhibi...

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2009 MRS Spring Meeting

作者： Arriagada, Anton Yu, Edward T. Bandaru, Prabhakar R. Deparment of Electrical and Computer Engineering University of California at San Diego San Diego CA 92093-0407 United States Materials Science Program Mechanical Engineering Department University of California at San Diego San Diego CA 92093-0411 United States

ISBN: (纸本)9781615677832

We present an improved methodology for a thermal transient method enabling simultaneous measurement of thermal conductivity and specific heat of nanoscale structures with one-dimensional heat flow. The temporal response of a sample to finite duration heat pulse inputs for both short (1 ns) and long (5 μs) pulses is analyzed and exploited to deduce the thermal properties. Excellent agreement has been obtained between the recovered physical parameters and computational simulations. © 2009 Materials Research Society.

关键词： Specific heat

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Melody Line Detection and source separation in classical saxophone recordings

Melody Line Detection and source separation in classical sax...

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12th International Conference on Digital Audio Effects, DAFx 2009

作者： Cano C., Estefanía Cheng, Corey TU Ilmenau/ Fraunhofer Institute IDMT Ilmenau Germany Music Engineering Technology Program Frost School of Music University of Miami Coral Gables FL United States Department of Electrical and Computer Engineering University of Miami Coral Gables FL United States

We propose a system which separates saxophone melodies from composite recordings of saxophone, piano, and/or orchestra. The system is intended to produce an accompaniment sans saxophone suitable for rehearsal and practice purposes. A Melody Line Detection (MLD) algorithm is proposed as the starting point for a source separation implementation which incorporates known information about typical saxophone melody lines, acoustic characteristics and range of the saxophone in order to prevent and correct detection errors. By extracting reliable information about the soloist melody line, the system separates piano or orchestra accompaniments from the solo part. The system was tested with commercial recordings and a performance of 79.7% of accurate detections was achieved. The accompaniment tracks obtained after source separation successfully remove most of the saxophone sound while preserving the original nature of the accompaniment track.

关键词： Source separation

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Unrestrained facile measurement of narrow-band ECG and respiratory variation in infants with a capacitive sheet-type sensor

Transactions of Japanese Society for Medical and Biological ...

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Transactions of Japanese Society for Medical and Biological engineering 2009年第1期47卷 42-50页

作者： Yama, Yoshihiro Ueno, Akinori Master's Program in Electronic and Computer Engineering Tokyo Denki University Japan Department of Electrical and Electronic Engineering Tokyo Denki University Japan

We propose a new method for obtaining narrow-band electrocardiographic potential (ECG) and respiratory variation in infants through their underwear. This method is based on capacitive coupling involving the electrode, the underwear, and the skin. In order to detect ECG signal and respiratory variation individually, a differential separation filter is introduced. The filter divides an input signal into a high frequency component for narrow-band ECG detection and a low frequency component for respiratory variation detection. To evaluate the proposed method, a pilot measuring device was made and tested. As the results, we confirmed the following: (1) Respiratory variation signal obtained with our device was highly correlated (r = 0.995) with that measured simultaneously with a commercial pneumotachograph. (2) Our pilot device succeeded in measuring narrow-band ECGand respiratory variation respectively in 13 of 15 and 11 of 15 measurements of infant aging 53 to 187 days. (3) R-R interval extracted from the narrow-band ECG was 25 times more precise than that calculated from photoplethysmogram. (4) Heart rate variability extracted from the narrow-band ECG was 100 times more precise than that calculated from photoplethysmogram. These results reveal that the proposed method appears promising for application to bedding of infants and neonate as a non-invasive and awareness-free approach for ECG and respiratory variation monitoring during sleep.

关键词： Electrodes

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