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Biomedical Topical Meeting, BIOMED 2002

作者： Ko, T.H. Drexler, W. Hartl, I. Ghanta, R.K. Paunescu, L.A. Wang, N. Lem, J. Schuman, J.S. Bursell, S.E. Fujimoto, J.G. Department of Electrical Engineering and Computer Science Research Laboratory of Electronics Massachusetts Institute of Technology CambridgeMA01239 United States Institute of Medical Physics University of Vienna Austria New England Eye Center Tufts Medical School BostonMA02114 United States Joslin Diabetes Center Harvard Medical School BostonMA02114 United States

We demonstrate an ultrahigh resolution OCT system capable of 1-3 µm resolution. Retinal architectural morphology is visualized and quantified in humans and in animal models. This promises to improve diagnosis and... 详细信息

ISBN: (纸本)1557527024

关键词： Diagnosis

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Elective participation in ad hoc networks based on energy consumption

Elective participation in ad hoc networks based on energy co...

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IEEE Conference and Exhibition on Global Telecommunications (GLOBECOM)

作者： M.R. Pearlman Jing Deng B. Liang Z.J. Haas New York State Center for Advanced Technology in Computer Applications and Software Engineering (CASE) and the Center for Systems Assume Department of Electrical Engineering and Computer Science (EECS) Syracuse University Syracuse NY USA School of Electrical and Computer Engineering Cornell University Ithaca NY USA Department of Electrical and Computer Engineering University of Toronto Toronto ONT Canada

In ad hoc networks, each node utilizes its limited resources to carry out the collective operation of the network. It is not always in the best interests of the network's nodes to demand the continuous participation of all nodes in the network operations. We propose an energy dependent participation (EDP) scheme, where a node periodically re-evaluates its participation in the network based on the residual energy in its battery. More importantly, a node gives special consideration to supporting the communication needs of its active network applications and preventing further network partitioning. EDP's localized partition checking algorithm is particularly well suited for the zone routing protocol, where the link-state information is proactively maintained within each node's local zone and routes to faraway nodes are reactively obtained via global queries. Through simulations, we evaluate the impact of our proposed scheme on battery life and network connectivity. Our results suggest that the EDP scheme can increase the usable lifetime of a battery-constraint ad hoc network by over 50%.

关键词： Intelligent networks Energy consumption Ad hoc networks Batteries Routing protocols Power engineering and energy Radio transceivers Mobile communication Broadcasting computer networks

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A new "mixed-mode" base current degradation mechanism in bipolar transistors

A new "mixed-mode" base current degradation mechanism in bip...

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Bipolar/BiCMOS Circuits and technology Meeting

作者： Gang Zhang J.D. Cressler Guofu Niu A.J. Joseph Alabama Microelectronics Science and Technology Center Electrical and Computer Engineering Department Aubum University Auburn AL USA School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA IBM Microelectronics Essex Junction VT USA

A new "mixed-mode" base current degradation mechanism has been identified in bipolar transistors, and is compared with other known stress mechanisms. 2-D simulations are used to shed light on the physical or... 详细信息

关键词： Degradation Bipolar transistors Stress Silicon germanium Germanium silicon alloys Microelectronics Physics computing Voltage Heterojunction bipolar transistors Computational modeling

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Micro biomedical diagnostic system for endoscopic microcapsule

Micro biomedical diagnostic system for endoscopic microcapsu...

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International Conference on Microtechnologies in Medicine and Biology

作者： Jong Oh Park Jun Keun Chang Yoon-Sik Lee Tae Song Kim Intelligent Microsystem Center Korea Institute of Science and Technology Seoul South Korea School of Electrical Engineering and Computer Science Seoul National University Seoul South Korea School of Chemical Engineering Seoul National University Seoul South Korea Microsystem Research Center Korea Institute of Science and Technology Seoul South Korea

For the development of micro biomedical diagnostic system for endoscopic microcapsule, we have developed micro cell lysis reactor, micro bead affinity chromatography, microneedle, microfluidic devices and micro detection devices. The basic components will be assembled into a micro integrated system, enhancing separation efficiencies and detection systems of target biomolecules.

关键词： Chemical technology Inductors Microfluidics Proteins Blood Assembly systems Molecular biophysics Resonance Control systems Data mining

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Conservation Laws, Uncertainty Relations, and Quantum Limits of Measurements

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Physical Review Letters 2002年第5期88卷 050402-050402页

作者： Masanao Ozawa Center for Photonic Communication and Computing Department of Electrical and Computer Engineering Northwestern University 2145 Sheridan Road Evanston Illinois 60208-3118 and CREST Japan Science and Technology Graduate School of Information Sciences Tohoku University Aoba-ku Sendai Miyagi 980-8579 Japan

The uncertainty relation between the noise operator and the conserved quantity leads to a bound on the accuracy of general measurements. The bound extends the assertion by Wigner, Araki, and Yanase that conservation laws limit the accuracy of “repeatable,” or “nondisturbing,” measurements to general measurements, and improves the one previously obtained by Yanase for spin measurements. The bound represents an obstacle to making a small quantum computer.

关键词： Atomic physics

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Interoperable web services for computational portals

Interoperable web services for computational portals

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2002 IEEE/ACM Conference on Supercomputing, SC 2002

作者： Pierce, Marlon Fox, Geoffrey Youn, Choonhan Mock, Steve Mueller, Kurt Balsoy, Ozgur Community Grid Labs Indiana University United States 501 N. Morton Street BloomingtonIN47404 United States Department of Electrical Engineering and Computer Science Syracuse University and Community Grid Labs Indiana University United States University of California at San Diego San Diego Supercomputer Center United States UC San Diego MC 0505 9500 Gilman Drive San DiegoCA92093-0505 United States School of Computational Science and Information Technology Florida State University and Community Grid Labs Indiana University United States

ISBN: (纸本)076951524X

Computational web portals are designed to simplify access to diverse sets of high performance computing resources, typically through an interface to computational Grid tools. An important shortcoming of these portals is their lack of interoperable and reusable services. This paper presents an overview of research efforts undertaken by our group to build interoperating portal services around a Web Services model. We present a comprehensive view of an interoperable portal architecture, beginning with core portal services that can be used to build Application Web Services, which in turn may be aggregated and managed through portlet containers. © 2002 IEEE.

关键词： Portals

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Tools for assessing conceptual understanding in the engineering sciences

Tools for assessing conceptual understanding in the engineer...

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Frontiers in Education (FIE) Conference

作者： D.L. Evans C. Midkiff R. Miller J. Morgan S. Krause J. Martin B.M. Notaros D. Rancour K. Wage Arizona State Univ. Center for Research on Education in Science Math Engineering and Technology (CRESMET) Tempe AZ Department of Mechanical Engineering Univ. of Alabama Tuscaloosa AL Colorado School of Mines Golden CO Department of Mechanical Engineering Texas A&M Univ. College Station TX Arizona State Univ. Tempe AZ Mechanical Engineering Univ. of Wisconsin Madison WI Electrical Engineering Univ. Massachusetts-Dartmouth Dartmouth MA Electrical and Computer Engineering Department George Mason Univ. Fairfax VA

One of the hindrances to reform in science, technology, engineering and mathematics (STEM) education is the absence of good assessment instruments that can measure the value added to student learning by new ways of teaching important material. The well-known Force Concept Inventory (FCI) assessment instrument is a good model of an instrument that can be used to check on student's understanding of basic concepts in a discipline. This panel session paper discusses work in progress by the panel members and their co-developers to construct FCI-like Concept Inventories in each of the disciplines of thermodynamics, systems and signals, strength of materials, electromagnetics, circuits, materials, fluid mechanics, and transport processes.

关键词： Instruments Educational technology Mechanical engineering Materials science and technology Mathematics Physics education Continuous improvement Continuing education Electromagnetic measurements Eyes

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Pockets of flexibility in workflow specification 20th

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20th International Conference on Conceptual Modeling, ER 2001

作者： Sadiq, Shazia Sadiq, Wasim Orlowska, Maria School of Computer Science and Electrical Engineering Australia Distributed Systems Technology Center The University of Queensland QLD4072 Australia Department of Computer Science Hong Kong University of Science and Technology Hong Kong

ISBN: (纸本)3540428666

Workflow technology is currently being deployed in quite diverse domains. However, the element of change is present in some degree and form in almost all domains. A workflow implementation that does not support the process of change will not benefit the organization in the long run. Change can be manifested in different forms in workflow processes. In this paper, we first present a categorization of workflow change characteristics and divide workflow processes into dynamic, adaptive and flexible processes. We define flexibility as the ability of the workflow process to execute on the basis of a loosely, or partially specified model, where the full specification of the model is made at runtime, and may be unique to each instance. To provide a modeling framework that offers true flexibility, we need to consider the factors, which influence the paths of (unique) instances together with the process definition. We advocate an approach that aims at making the process of change part of the workflow process itself. We introduce the notion of an open instance that consists of a core process and several pockets of flexibility, and present a framework based on this notion, which makes use of special build activities that provide the functionality to integrate the process of defining a change, into the open workflow instance. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Specifications

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Classification on data with biased class distribution 1

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12th European Conference on Machine Learning, ECML 2001

作者： Vucetic, Slobodan Obradovic, Zoran School of Electrical Engineering and Computer Science Washington State University PullmanWA99164 United States Center for Information Science and Technology Temple University PhiladelphiaPA19122 United States

ISBN: (数字)9783540447955

ISBN: (纸本)3540425365

Labeled data for classification could often be obtained by sampling that restricts or favors choice of certain classes. A classifier trained using such data will be biased, resulting in wrong inference and sub-optimal classification on new data. Given an unlabeled new data set we propose a bootstrap method to estimate its class probabilities by using an estimate of the classifier’s accuracy on training data and an estimate of probabilities of classifier’s predictions on new data. Then, we propose two methods to improve classification accuracy on new data. The first method can be applied only if a classifier was designed to predict posterior class probabilities where predictions of an existing classifier are adjusted according to the estimated class probabilities of new data. The second method can be applied to an arbitrary classification algorithm, but it requires retraining on the properly resampled data. The proposed bootstrap algorithm was validated through experiments with 500 replicates calculated on 1,000 realizations for each of 16 choices of data set size, number of classes, prior class probabilities and conditional probabilities describing a classifier’s performance. Applications of the proposed methodology to a benchmark data set with various class probabilities on unlabeled data and balanced class probabilities on the training data provided strong evidence that the proposed methodology can be successfully used to significantly improve classification on unlabeled data. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Classification (of information)

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Self-assembled quantum dot transformations via anion exchange

Journal of Vacuum Science & Technology B: Microelectronics a...

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Journal of Vacuum science & technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena 2001年第4期19卷 1463-1466页

作者： Jeng-Jung Shen April S. Brown Yongqian Wang Zhong L. Wang School of Electrical and Computer Engineering Microelectronics Research Center Georgia Institute of Technology Atlanta Georgia 30332 School of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332

We report the effect of dissimilar anion anneals on the properties of layered quantum dot structures exhibiting vertical self-organization. Such anneals may provide an additional means of controlling dot properties, such as composition, size, and position. In addition, the modification of surface strain is critical to the subsequent nucleation of dots after the initial seed layer. Anion exchange may modify the strain at the semiconductor surface. We find that the effects of P2 and As4 anneals on InAs quantum dot size distributions are different. P2 anneals at relatively high temperatures (350 °C) can cause the loss of the three-dimensional morphology due to surface exchange. P2 anneals at lower temperatures (300 °C) appear to improve the uniformity of the dot size distribution. This behavior is not observed for anneals under As4. The dot size uniformity decreases by annealing dots under As4 at 300 °C.

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