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113th Annual ASEE Conference and Exposition, 2006

作者： Adams, Robert Zhang, James Yanik, Paul Burbank, Kenneth Western Carolina University United States Department of Electrical and Computer Engineering Technology School of Technology Western Carolina University United States IEEE ASEE Department of Electrical Engineering Kimmel School of Construction Management Engineering and Technology Western Carolina University United States School of Technology Western Carolina University United States Department of Electrical and Computer Engineering Technology Program United States Department of Electrical Engineering Western Carolina University United States IEEE SME TAC of ABET

This article discusses the results of a senior design project to design a baseband system for a communication system, as well as on-going efforts to improve the design. Upon completion, the experimental design is intended for use in our Digital Circuits, Digital Signal Processing (DSP) , and Electronic Communications courses. For this reason, plans for incorporating design aspects of a communications system in these courses are discussed. © American Society for engineering Education, 2006.

关键词： Digital signal processors

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Performance studies of a coding scheme for a slepian -wolf source network

Performance studies of a coding scheme for a slepian -wolf s...

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2006 International Conference on Communications in Computing, CIC 2006

作者： Aziz, Azizuddin Abdul Kieffer, John Electrical and Electronics Engineering Program Universiti Teknologi PETRONAS 31750 Tronoh Perak Malaysia Department of Electrical and Computer Engineering University of Minnesota 200 Union Street S.E. Minneapolis MN 55455 United States

ISBN: (纸本)1601320124

We investigate the simplest Slepian-Wolf source network, consisting of an information source correlated with a second source used as a side-information for the decoder but not the encoder. The information source and side-information source are modeled as binary random sequences X={i}Y={Yi} , respectively, for which the pairs (Xi Yi are independent- identically distributed (i.i.d). In 1973, Slepian and Wolf characterized the optimum rate at which X can be encoded so that the decoder can recover X with the aid of Y . It is only in recent years, however, that practical coding schemes have been proposed which encode at a rate close to the Slepian- Wolf rate. One such coding scheme, proposed by Ramchandran et al.[2], uses a binary linear block channel code for encoding X while the decoder is furnished with the coset for each source block. We propose an alternate coding scheme, in which we also use a linear block channel code based encoder, but instead use a decoder which minimizes distortion as measure by the per-letter expected Hamming distance between source blocks and decoded source blocks. We provide the results of computer calculations indicating the distortion improvement over the Ramchandran et al.[2] coding scheme that can be expected with our coding scheme. The comparisons are done for several source models and for several linear block codes. Copyright © 2006 CSREA Press.

关键词： Hamming distance

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Challenges in curriculum adaptation across institutions of higher education: International and national student transfer

Challenges in curriculum adaptation across institutions of h...

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113th Annual ASEE Conference and Exposition, 2006

作者： Kempter, Roland Furse, Cynthia Safai, Nick Cotter, Neil Brinton, Lee University of Utah United States Dept. of Electrical and Computer Engineering University of Utah United States Center of Excellence for Smart Sensor Center of Excellence for Smart Sensors University of Utah United States Electrical and Computer Engineering Department Research for LiveWire Test Labs Inc. Salt Lake City College United States Engineering Department United States Japan United States SLCC South Africa Dept. Electrical and Computer Engineering University of Utah United States Salt Lake Community College United States Electrical Engineering Program Department of Electrical Engineering Salt Lake Community College United States IEEE

The challenges associated with student transfer between institutions of higher education are investigated. The Utah System of Higher Education (USHE) requires that undergraduate courses from non-ABET accredited institutions are recognized across public universities and colleges in Utah. Based on empirical data, we show that as a result, curriculum development now has to take place across institutions. As a first step, to maintain academic standards in this changing environment, before granted major status in electrical engineering, we propose an admissions test for all students. In addition, undergraduate student performance could be continuously monitored, similar to the monitoring process of international graduate students. Typically, the change in academic environment for students also includes the transition from a more personal to a more anonymous setting. Thus, we propose the creation of a "transfer student academic advisory" position - similar to an international advisor - in all colleges across Utah. Our research is a first step towards the goal of achieving unified engineering program. across institutions. © American Society for engineering Education, 2006.

关键词： engineering education

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Procedural modeling of urban land use 06

Procedural modeling of urban land use

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International Conference on computer Graphics and Interactive Techniques, SIGGRAPH 2006

作者： Lechner, Thomas Ren, Pin Watson, Ben Brozefski, Craig Wilenski, Uri Department of Electrical Engineering and Computer Science Northwestern University United States Department of Computer Science North Carolina State University United States Program Learning Sciences Northwestern University United States

No abstract available.

ISBN: (纸本)1595933646

No abstract available.

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Autofluorescence Patterns in Short-Term Cultures of Normal Cervical Tissue

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Photochemistry and Photobiology 2007年第6期71卷

作者： Carrie K. Brookner Michele Follen Iouri Boiko Javier Galvan Sharon Thomsen Anais Malpica Seigo Suzuki Reuben Lotan Rebecca Richards-Kortum Biomedical Engineering Program and Department of Electrical and Computer Engineering University of Texas at Austin Austin TX Department of Gynecologic Oncology U. T. M. D. Anderson Cancer Center Houston TX Department of Pathology U. T. M. D. Anderson Cancer Center Houston TX Department of Tumor Biology U. T. M. D. Anderson Cancer Center Houston TX.

Fluorescence spectroscopy has potential to improve cervical precancer detection. The relationship between tissue biochemistry and fluorescence is poorly understood. The goal of this study was to characterize normal cervical autofluorescence, using fresh tissue short-term tissue cultures and epithelial cell suspensions. Transverse, short-term tissue cultures were prepared from 31 cervical biopsies; autofluorescence images were obtained at 380 and 460 nm excitation. Fluorescence excitation–emission matrices were measured from normal, precancerous and cancerous cervical cell suspensions. Observed fluorescence patterns contrast those reported for frozen–thawed tissue, and were placed into groups with (1) bright epithelial and weak stromal fluorescence; (2) similar epithelial and stromal fluorescence; and (3) weak epithelial and bright stromal fluorescence. The average ages of women in the groups were 30.9, 38.0 and 49.2 years. Epithelial fluorescence intensity was similar in Groups 1 and 2, but weaker in Group 3. Stromal intensity was similar in Groups 2 and 3, but weaker in Group 1. The ratio of epithelial to stromal fluorescence intensity was significantly different for all groups. EEMs of cell suspensions showed peaks consistent with tryptophan, reduced form of nicotinamide adenine dinucleotide (phosphate) and flavin adenine dinucleotide. Short-term tissue cultures represent a novel, biologically appropriate model to understand cervical autofluorescence. Our results suggest a biological basis for the increased fluorescence seen in older, postmenopausal women.

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Blank slate engineering at Florida Gulf Coast University - Innovative and multidisciplinary from the ground up

Blank slate engineering at Florida Gulf Coast University - I...

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113th Annual ASEE Conference and Exposition, 2006

作者： Blanchard, Susan Egiebor, Nosa Sweeney, James Zidek, Lisa Sechrist, Chalmers Hulbert, Sam Osborn, James O'Neill, Robert Florida Gulf Coast University United States FGCU School of Engineering Institute of Electrical and Electronics Engineers Biomedical Engineering Society American Institute for Medical and Biological Engineering United Kingdom Department of Environmental and Civil Engineering Arizona State University United States Department of Bioengineering Department of Bioengineering Arizona State University United States Flinn Foundation Funded Multi- and Interdisciplinary Graduate Training Program in Bioengineering Milwaukee School of Engineering United States Graduate Programs Industrial Engineering Program Department of Electrical and Computer Engineering Department of Engineering University of Illinois Urbana-Champaign United States Institute of Electrical and Electronics Engineers Rose-Hulman Institute for Technology School of Engineering FGCU School of Engineering's Advisory Board Roger Williams University United States Department of Civil Engineering Department of Engineering Roger Williams University United States

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Team work experiences in process automation for precision chemical deposition

Team work experiences in process automation for precision ch...

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113th Annual ASEE Conference and Exposition, 2006

作者： Evans, Jeffrey Kirleis, Matthew Smith, Casey Purdue University United States Department of Electrical and Computer Engineering Technology Purdue University West Lafayette IN United States ASEE ACM IEEE Electrical and Computer Engineering Technology Program Purdue University West Lafayette IN United States Advanced Micro Devices Austin TX United States

The area of chemical analysis is growing rapidly, supporting areas related to Bioengineering, such as pharmaceuticals and genetics. High throughput of analyses is becoming more critical. As the size of each sample shrinks, so to does the time available to perform accurate analysis due to evaporation and other contamination factors. New materials and processes are being created in order to provide the ability to analyze large numbers of samples in a reasonable period of time. One such project at Purdue is reducing the size of samples even further, while increasing the spatial density of a group of samples. This requires increased precision in two-dimensional alignment and sample deposition. Students in electrical and computer engineering technology participated in an interdisciplinary project with chemical engineering students to automate a mostly manual alignment and deposition process. Automation of this process involves the integration and precise computer control of several disjoint instruments. The primary objective of this work was to increase throughput by several orders of magnitude. Secondary goals include system characterization and prediction of throughput upper bounds using available technology and off-the-shelf components. Successful completion of these objectives requires a combination of skills learned in the classroom as well as teamwork among students within specific disciplines as well as those from others, where technical languages and dialects are different. This paper describes the problem and subsequent design, implementation and system characterization activities undertaken. New and innovative test and measurement techniques were developed, requiring creative solutions using and stretching those learned in the classroom. Descriptions of the obstacles, methods, lessons learned, and throughput improvement results are presented. This work has provided a unique opportunity for interdisciplinary collaboration and research and development experiences

关键词： Process control

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Cooperative defence against DDoS attacks

Cooperative defence against DDoS attacks

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作者： Zhang, Guangsen Parashar, Manish 628 CoRE Department of Electrical and Computer Engineering Rutgers the State University of New Jersey 94 Brett Road Piscataway NJ 08854-8058 Department of Electrical and Computer Engineering Rutgers University Rutgers University Applied Software Systems Laboratory IEEE Computer Society Distinguished Visitor Program ACM

Distributed denial of service (DDoS) attacks on the Internet have become an immediate problem. As DDoS streams do not have common characteristics, currently available intrusion detection systems (IDS) cannot detect them accurately. As a result, defend DDoS attacks based on current available IDS will dramatically affect legitimate traffic. In this paper, we propose a distributed approach to defend against distributed denial of service attacks by coordinating across the Internet. Unlike traditional IDS, we detect and stop DDoS attacks within the intermediate network. In the proposed approach, DDoS defence systems are deployed in the network to detect DDoS attacks independently. A gossip based communication mechanism is used to exchange information about network attacks between these independent detection nodes to aggregate information about the overall network attacks observed. Using the aggregated information, the individual defence nodes have approximate information about global network attacks and can stop them more effectively and accurately. To provide reliable, rapid and widespread dissemination of attack information, the system is built as a peer to peer overlay network on top of the internet. Copyright © 2006, Australian computer Society Inc.

关键词： Security systems

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Design and Implementation of a Low Cost Series Compensator for Voltage Sags

Design and Implementation of a Low Cost Series Compensator f...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： I R Filho Jl Silva Neto Lg Rolim M Aredes Federal University of Rio de Janeiro Brazil Department of Electrical Engineering Federal University of Rio de Janeiro Brazil Federal University of Rio de Janeiro Department of Electrical Engineering COPPE/Electrical Engineering Program. rolim@dee.ufrj.br COPPE/Electrical Engineering Program. aredes@coe.ufrj.br

In this paper, the topology of a low cost series compensator for voltage sags (SCVS) are introduced. This device deliver to a sensitive load in a distribution system, three-phase sinusoidal balanced and regulated voltages, even under voltage sags. This topology differs from the typical DVR (dynamic voltage restorer) in the literature, however, on where the diode rectifier is connected: at the in-bus (DVR) or at the out-bus-regulated (proposed topology - IDVR) of the SCVS. In order, to validate the developed SCVS a prototype was implemented verifying the SCVS dynamics in the presence of a voltage dip caused by the turn-on of an inductive load, and harmonics due to the diode rectifier

关键词： Costs Power quality Power system harmonics Topology Voltage fluctuations Diodes Rectifiers Prototypes Power system protection Uninterruptible power systems

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Student engagement through mathematical applications in electrical power systems

Student engagement through mathematical applications in elec...

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113th Annual ASEE Conference and Exposition, 2006

作者： Osorno, Bruno California State University Northridge United States Department of Electrical and Computer Engineering California State University Northridge United States Electric Power Systems Graduate and Undergraduate Program

Historically, electrical engineering students have been very proficient in the application of mathematics. At California State University we have experienced, recently, a negative shift of mathematical interest and therefore a lack of progress in the understanding of basic concepts that require a strong mathematical background. This problem stems from the lack of mathematical skills and studying habits. One way to solve this problem is to engage our students into the application of mathematics with simple, yet, powerful problems. An assessment of such engagement occurs every week with a quiz that spans the material covered during the previous week and tests some of the mathematical and engineering skills. This paper attempts to show the results of such assessment and the outcome of a class in which such approach was tasted. During this semester we are testing this technique again in a different course. © American Society for engineering Education, 2006.

关键词： Students

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