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ISSPIT 2007 - 2007 IEEE International Symposium on Signal Processing and Information Technology

作者： Zarei Mahmoodabadi, S. Alirezaie, J. Babyn, P. Department of Electrical and Computer Engineering Ryerson University Toronto ON Canada Department of Systems Design Engineering University of Waterloo Waterloo ON Canada Department of Electrical Engineering KNT University Tehran Iran Hospital for Sick Children Toronto ON Canada

ISBN: (纸本)9781424418350

An application of Wavelet Packet is presented for electrocardiogram (ECG) and Magnetic Resonance Spectroscopy (MRS) characteristics detection in this study. A fully automated system is developed to detect the "R" peaks which are beat designators and are used consequently to locate other ECG characteristics. They include "P", "Q", "S" and "T" waves along with "ST" segment shift. The peaks and the area under the peaks of MRS signals are also detected. The Daubechies wavelets are selected as base processing filters. Frequency Ordered Wavelet Packets (FOWPT) is utilized to generate a time - frequency plot of the signal used for further processing. The algorithm is validated on MIT-BIH database. The proposed beat detector achieved sensitivity of 99.18%±2.75 and a positive predictivity of 98.00%±4.45. The "P" wave detector achieved sensitivity of 51.69% and a positive predictivity of 53.64%. ©2007 IEEE.

关键词： Electrocardiograms

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Coherence multiplex system topologies

Coherence multiplex system topologies

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作者： Meijerink, Arjan Taniman, Robert O. Heideman, Geert H. L. M. Van Etten, Wim IEEE Telecommunication Engineering Group Faculty of Electrical Engineering Mathematics and Computer Science University of Twente 7500 AE Enschede Netherlands Department of Design and Analysis of Communication Systems Faculty of Electrical Engineering Mathematics and Computer Science University of Twente 7500 AE Enschede Netherlands

Coherence multiplexing is a potentially inexpensive form of optical code-division multiple access, which is particularly suitable for short-range applications with moderate bandwidth requirements, such as access networks, LANs, or interconnects. Various topologies are known for constructing an optical transmission system in which several channels are coherence-multiplexed in one optical fiber. In this paper, the parallel array, the intrinsic reference ladder (IRL), and the discontinuous series system topologies will be further considered and compared with respect to code orthogonality requirements, theoretical performance, and some practical implementation aspects. A modification to the IRL system is proposed, resulting in a significant improvement in the theoretical performance. © 2007 IEEE.

关键词： Optical communication

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Work in progress — Multidisciplinary laboratory for development, design and consumer testing of marketable residential LED luminaires

Work in progress — Multidisciplinary laboratory for develop...

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Frontiers in Education (FIE) Conference

作者： Janice K. Means Lisa Anneberg Christina Snyder Jin Feng Departments of Architecture and Design Electrical and Computer Engineering College of Architecture and Design Lawrence Technological University Southfield MI USA Departments of Architecture and Design Electrical and Computer Engineering College of Engineering Lawrence Technological University Southfield MI USA

electrical engineers and architects collaborate in 'real life'. In the university, this rarely happens. This paper presents novel approaches to a laboratory that brings electrical engineering and architecture students together. Lawrence Technological University is participating in the 'Solar Decathlon 2007' international competition. Lighting is a critical part of this competition and 'lighting energy use' is one of the ten competitions. The designed house will have varying lighting requirements, and innovative energy conserving lighting approaches are required. The LTU laboratory facility will eventually have several stations known collectively as 'The Lighting Lab'. electrical engineering students work on the technical aspects of light measurement and the design and manufacturing of luminaires, whereas architecture students work on designing esthetically pleasing lighting luminaires that meet the illumination requirements. Equipment in the lab includes various luminaries, lamps, an artificial sky fixture, a direct beam sunlight simulator, light meters and demonstration displays. Students become familiar with direct/indirect light sources and conventional and low-voltage lighting, and then develop how it can be used for task, decorative and general lighting. A focus for research is the study of LEDs [light emitting diodes]. LED luminaries require further development to provide required illumination at work surfaces in an esthetically pleasing way.

关键词： Laboratories Testing Light emitting diodes electrical engineering Architecture Lighting Collaborative work Electric variables measurement Manufacturing Fixtures

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American Institute of Ultrasound in Medicine consensus report on potential bioeffects of diagnostic ultrasound: Executive summary

American Institute of Ultrasound in Medicine consensus repor...

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作者： Fowlkes, J. Brian Abramowicz, Jacques S. Church, Charles C. Holland, Christy K. Miller, Douglas L. O'Brien Jr., William D. Sanghvi, Narendra T. Stratmeyer, Melvin E. Zachary, James F. Deng, Cheri X. Harris, Gerald R. Herman, Bruce A. Hynynen, Kullervo H. Merritt, Christopher R. B. Thomenius, Kai E. Bailey, Michael R. Carson, Paul L. Carstensen, Edwin L. Frizzell, Leon A. Nyborg, Wesley L. Barnett, Stanley B. Duck, Francis A. Edmonds, Peter D. Ziskin, Marvin C. Abbott, John G. Dalecki, Diane Dunn, Floyd Greenleaf, James F. Salvesen, Kjell A. Siddiqi, Tariq A. Averkiou, Michalakis A. Brayman, Andrew A. Everbach, E. Carr Wible Jr., James H. Wu, Junru Simpson, Douglas G. Basic Radiological Sciences Division Department of Radiology University of Michigan Health System 200 Zina Pitcher Pl Ann Arbor MI 48109-0553 United States Department of Radiology University of Michigan Ann Arbor MI United States Department of Obstetrics and Gynecology Rush University Medical Center Chicago IL United States National Center for Physical Acoustics University of Mississippi University MS United States Departments of Biomedical Engineering and Radiology University of Cincinnati Cincinnati OH United States Bioacoustics Research Laboratory Department of Electrical and Computer Engineering University of Illinois Urbana IL United States Focus Surgery Inc. Indianapolis IN United States US Food and Drug Administration Center for Devices and Radiological Health Silver Spring MD United States Department of Veterinary Pathobiology University of Illinois Urbana IL United States Department of Biomedical Engineering Case Western Reserve University Cleveland OH United States Department of Radiology Brigham and Women's Hospital Harvard Medical School Boston MA United States Department of Radiology Thomas Jefferson University Hospital Philadelphia PA United States General Electric Global Research Niskayuna NY United States Applied Physics Laboratory University of Washington Seattle WA United States Rochester NY United States Burlington VT United States School of Biomedical Sciences University of Sydney Sydney NSW Australia Wessex Regional Medical Physics Service Royal United Hospital Combe Park Bath United Kingdom Menlo Park CA United States Department of Radiology Temple University Philadelphia PA United States Food and Drug Administration Center for Devices and Radiological Health Silver Spring MD United States Philips Medical Systems Bothell WA United States Department of Biomedical Engineering University of Rochester Rochester NY United States Urbana IL United States Department of Physiology and Biomedical Engineer

The continued examination of potential biological effects of ultrasound and their relationship to clinical practice is a key element in evaluating the safety of diagnostic ultrasound. Periodically, the American Institute of Ultrasound in Medicine (AIUM) sponsors conferences bringing experts together to examine the literature on ultrasound bioeffects and to develop conclusions and recommendations related to diagnostic ultrasound. The most recent effort included the examination of effects whose origins were thermal or nonthermal, with separate evaluations for potential effects related to fetal ultrasound. In addition, potential effects due to the introduction of ultrasound contrast agents were summarized. This information can be used to assess risks in comparison to the benefits of diagnostic ultrasound. The conclusions and recommendations are organized into 5 broad categories, with a comprehensive background and evaluation of each topic provided in the corresponding articles in this issue. The following summary is not meant as a substitute for the detailed examination of issues presented in each of the articles but rather as a means to facilitate further study of this consensus report and implementation of its recommendations. The conclusions and recommendations are the result of several rounds of deliberations at the consensus conference, subsequent review by the Bioeffects Committee of the AIUM, and approval by the AIUM Board of Governors. © 2008 by the American Institute of Ultrasound in Medicine.

关键词： Ultrasonics

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Sensors and systems in a freshman design course

Sensors and systems in a freshman design course

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114th Annual ASEE Conference and Exposition, 2007

作者： Sheppard, Keith Blicharz, Edward Gallois, Bernard Jain, Rashmi Denholm, Ian Stevens Institute of Technology United States Department of Materials Engineering ASEE Design in Engineering Education Division Electrical and Computer Engineering Department Stevens Institute of Technology United States Department of Engineering Stevens Institute of Technology United States Department of Systems Engineering Stevens Institute of Technology United States

The second design course taken by all engineering Freshman was recently revised to build upon a first semester design course project in which sensors and programming (C++) are introduced in a robot challenge. In the second design course the students now have their programming knowledge extended to a graphical environment by learningLabVIEW™ through a series of assignments in which they interface various sensors to their laptop computers. Applications include a simple motor speed control using a shaft encoder. Students then use their knowledge in a team design project that incorporates data acquisition from sensors to a laptop computer, display of the sensor data and its use to control some aspect of the system to which it is applied. Teams are provided with design project choices, each posed as a set of system requirements. This together with mini-lectures and assignments continue a thread started in the first design course to develop systems concepts in the context of design. Development of students ' comfort and capacity with sensors and systems as a core thread early in their education provides an important foundation for future engineers. © American Society for engineering Education, 2007.

关键词： engineering education

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Algebraic methods for optimizing constant multiplications in linear systems

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Journal of VLSI Signal Processing systems for Signal, Image, and Video Technology 2007年第1期49卷 31-50页

作者： Hosangadi, Anup Fallah, Farzan Kastner, Ryan Synthesis Group Cadence Design Systems San Jose CA 95134 United States Advanced CAD Technology Fujitsu Laboratories of America Sunnyvale CA 94085 United States Department of Electrical and Computer Engineering University of California Santa Barbara Santa Barbara CA 93106 United States

Constant multiplications can be efficiently implemented in hardware by converting them into a sequence of nested additions and shift operations. They can be optimized further by finding common subexpressions among these operations. In this work, we present algebraic methods for eliminating common subexpressions. Algebraic techniques are established in multi-level logic synthesis for the minimization of the number of literals and hence gates to implement Boolean logic. In this work we use the concepts of two of these methods, namely rectangle covering and fast extract (FX) and adapt them to the problem of optimizing linear arithmetic expressions. The main advantage of using such methods is that we can optimize systems consisting of multiple variables, which is not possible using the conventional optimization techniques. Our optimizations are aimed at reducing the area and power consumption of the hardware, and experimental results show up to 30.3% improvement in the number of operations over conventional techniques. Synthesis and simulation results show up to 30% area reduction and up to 27% power reduction. We also modified our algorithm to perform delay aware optimization, where we perform common subexpression elimination such that the delay is not exceeded beyond a particular value. © 2007 Springer Science+Business Media, LLC.

关键词： Linear systems

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On achieving high performance wireless mesh networks with data fusion

On achieving high performance wireless mesh networks with da...

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2007 IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks, WOWMOM

作者： Sangkil, Jung Sangjin, Hong Kyungtae, Kim Mobile Systems Design Laboratory Dept. of Electrical and Computer Engineering Stony Brook University-SUNY NY 11794 United States IP Network and Distributed Systems NEC Laboratories America Princeton NJ 08540 United States

ISBN: (纸本)1424409926

Wireless Mesh Network (WMN) supports various types of mesh clients such as sensor networks, cellular, 802.11/e Wireless LAN, etc. In this case, it needs to be suitably organized and adopt well-known or newly proposed algorithm to guarantee high and reliable mesh performance. This paper applies RObust Header Compression (ROHC) originate from cellular data network plus packet aggregation to WMNs when mesh clients generate smallsize fusion data, i.e., sensor (delivered by UDP) and voice over IP (VOIP) data. We preliminarily analyze ROHC and packet aggregation improve UDP throughput and the number of supported voice calls. However, the improvement does not include a processor's processing overhead for ROHC and packet aggregation, which is examined by measuring ROHC execution time from Intel Pentium 4 and RouterBOARD, and applying the results into NS-2 simulations. The results indicate UDP and voice performance are seriously affected by the processing overhead. As a solution for the performance degradation, we introduce a hardware design for the two algorithms. By using Systeme Hardware Description Language (HDL), we first design hardware specification composed of 1Ghz master clock and 333Mhz BUS system. Then, we integrate the hardware model into previous NS-2 network model, and propose profile-based network/hardware co-simulation method which gives insight how to investigate real-timing characteristics of the hardware model in the view of network behaviors. © 2007 IEEE.

关键词： Mesh generation

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Human Factors for designing a Haptic Interface for Interaction with a Virtual Environment

Human Factors for Designing a Haptic Interface for Interacti...

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IEEE International Workshop on Haptic, Audio and Visual Environments and Their Applications

作者： Mehrdad H. Zadeh David Wang Eric Kubica Electrical and Computer Engineering Department University of Waterloo Canada Department of Systems Design Engineering University of Waterloo Canada

designing haptic displays is one of the main challenges in creating virtual reality systems with the sense of touch. The design of the hardware and software of haptic interfaces depends critically on the capabilities of the human haptic system. For example, force feedback interfaces, due to inherent hardware limitations such as friction and actuator saturation, present forces to users in the case of interactions with a virtual environment which are only approximations of the forces that they would feel if they were interacting with the real world. Thus, quantitative human studies are required to obtain the impact on human performance of these approximations in the forces from the haptic devices. First, the focus of this paper is on the quantitative measures of human factors (force thresholds) that affect the design specifications of force feedback haptic interfaces when the human user or the object are in relative motion. Second, the effects of two direction of forces and the increment/decrement of forces are also studied through two experiments. It appears that the JNDs of human force perception depend on the force direction and the force increment/decrement, and these two variables must be incorporated in an efficient haptic design technique when the user's hand is in motion.

关键词： Human factors Haptic interfaces Virtual environment Force feedback Hardware Force measurement Displays Virtual reality Friction Actuators

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Location-Based Message Aggregation in Vehicular Ad Hoc Networks

Location-Based Message Aggregation in Vehicular Ad Hoc Netwo...

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IEEE Globecom Workshops

作者： Hanan Saleet Otman Basir Department of Systems Design Engineering University of Waterloo ONT Canada Department of Electrical and Computer Engineering University of Waterloo ONT Canada

In vehicular ad hoc networks, vehicles cooperate in receiving and delivering messages to each other in ad hoc manner without the need for an expensive fixed infrastructure. Nevertheless, inter-vehicle communications require solving the problem of message routing, where the location of the destination node is unknown due to node mobility and lack of adequate infrastructure. Hence, the problem of finding the location of the destination node (node localization) becomes very complex. One of the most recent solution approaches for node localization in VANET is to use location service management protocols. However, major impediments in leveraging such promising solutions include the large volume of signaling overhead which results from the increase in the number of vehicles and/or the non-local communication traffic in the network. In this paper, a region-based location service management protocol (RLSMP) is proposed. This protocol is a self-organizing framework, which uses message aggregation enhanced by geographical clustering to minimize the volume of the signaling overhead. RLSMP is the first protocol that uses message aggregation in querying, and promises scalability, locality awareness, minimum signaling overhead and maximum channel utilization.

关键词： Ad hoc networks Protocols Network servers Vehicles Costs Information retrieval Large-scale systems Automotive engineering design engineering systems engineering and theory

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Teaching and mentoring research experiences for undergraduates in power electronics

Teaching and mentoring research experiences for undergraduat...

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114th Annual ASEE Conference and Exposition, 2007

作者： Sterk, Doug Thacker, Tim Tranter, Elizabeth Goff, Richard Terpenny, Janis Virginia Tech. United States Bradley Department of Electrical and Computer Engineering Virginia Tech. United States Center for Power Electronic Systems Department of Innovation in Engineering Education Department of Engineering Education Virginia Tech. United States Department of Engineering Education NSF Multi-University Center for E-Design ASEE ASME IIE Alpha Pi Mu

No abstract available

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