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2005 AAAI Spring Symposium

作者： Watters, S. McInnes, B. McKoskey, D. Miller, T. Boley, D. Gini, M. Schuler, W. Polukeyeva, A. Gundel, J. Pakhomov, S. Savova, G. Dept. of Computer Science and Engineering University of Minnesota Dept. of Linguistics University of Minnesota Division of Biomedical Informatics Mayo College of Medicine

The long-term goal of this project is to build an annotated corpus of biomedical text, to be used as a foundation for the development of automated anaphora resolution systems. We plan to explore the feasibility of using a community of volunteers to annotate a corpus drawn from publically available biomedical literature. We present issues in creating such a community and discuss results obtained from a pilot study. Copyright © 2005, American Association for Artificial Intelligence (***). All rights reserved.

关键词： Text processing

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On the use of distributed processing models in demanding digital signal processing applications

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WSEAS Transactions on Information science and Applications 2005年第12期2卷 2204-2211页

作者： Vassiliadis, B. Fotopoulos, V. Tsaknakis, J. Ioannou, K. Department of Computer Science Hellenic Open University 13-15 Tsamadou st. GR-26222 Patras Greece Dept. of Computer Engineering and Informatics University of Patras Patras Greece Wireless Telecommunication Laboratory Department of Electrical and Computer Engineering University of Patras Rion 26500 Patras Greece

Distributed Processing Models (DPM) such as the Grid, cluster computing and parallel processors are now more available, and affordable, to simple users. This availability permits the execution of extremely CPU demanding applications. Digital Signal Processing (DSP) is an area that benefits from such advances. DSP is used in a wide area of commercial and scientific applications such as computer graphics, simulation, media copyright protection and image processing. DPM for DSP is technically and economically viable. Promising applications that will be explored in this work include coding, rendering, copyright protection that is, highly demanding applications in terms of CPU load. Specific cases of heavy load mathematical transformations for large media objects are discussed. A proposal for incorporating the watermarking procedure in the Grid architecture is also briefly presented.

关键词： Distributed computer systems

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Mechanically robust micro-fabricated strain gauges for use on bones

Mechanically robust micro-fabricated strain gauges for use o...

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2005 3rd IEEE/EMBS Special Topic Conference on Microtechnology in Medicine and Biology

作者： Wen, Yu-Hsin Yang, Gloria Y. Bailey, Vasudev J. Lin, Gisela Tang, William C. Keyak, Joyce H. Dept. of Electrical Engineering and Computer Science Henry Samueli School of Engineering University of California Irvine Dept. of Biomedical Engineering Henry Samueli School of Engineering University of California Irvine Department of Orthopaedic Surgery School of Medicine University of California Irvine

ISBN: (纸本)0780387112

We present a new micro-fabrication process to improve the yield of thin film metal strain gauges that are embedded in a poly-dimethyl-siloxane (PDMS) membrane. This work is directed towards the realization of a flexible, implantable sensor array for measuring surface strain on live bone. Although previous lift-off and peeling processes have been demonstrated to be feasible for fabricating the strain gauges in PDMS [1], they resulted in a very low yield, approximately 5%. Hence, we implemented a different process to improve the mechanical robustness and fabrication yield. One of the key improvements was the use of wet etching to pattern the thin metal film instead of conventional lift-off. The results demonstrated both an increase in yield to 50% and further miniaturization of the devices. Electromechanical testing results revealed that our metal thin-film gauges have greater gauge factors than commercially available ones, which will result in potentially more precise strain sensing. Various biocompatible adhesives were tested for fixing the micro strain sensor to imitation bone materials. Ultimately this strain gauge will be part of an implantable, wireless array for real-time in vivo monitoring of bone strain in the presence of disease and bone remodeling. © 2005 IEEE.

关键词： Strain gages

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A hypergraph partitioning based approach for scheduling of tasks with batch-shared I/O 05

A hypergraph partitioning based approach for scheduling of t...

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IEEE/ACM International Symposium on Cluster Computing and the Grid (CCGRID)

作者： Gaurav Khanna Nagavijayalakshmi Vydyanathan T. Kurc U. Catalyurek P. Wyckoff J. Saltz P. Sadayappan Dept. of Computer Science and Engineering Dept. of Biomedical Informatics The Ohio State University USA Ohio Supercomputer Center USA Department of Computer Science and Engineering Ohio State Uinversity USA

ISBN: (纸本)9780780390744

This paper proposes a novel, hypergraph partitioning based strategy to schedule multiple data analysis tasks with batch-shared I/O behavior. This strategy formulates the sharing of files among tasks as a hypergraph to minimize the I/O overheads due to transferring of the same set of files multiple times and employs a dynamic scheme for file transfers to reduce contention on the storage system. We experimentally evaluate the proposed approach using application emulators from two application domains; analysis of remotely-sensed data and biomedical imaging.

关键词： Processor scheduling Data analysis Pipelines biomedical engineering Data engineering Image analysis biomedical imaging Subcontracting Data processing Computational modeling

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Scalable parallel octree meshing for terascale applications 05

Scalable parallel octree meshing for terascale applications

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ACM/IEEE 2005 Supercomputing Conference, SC'05

作者： Tu, Tiankai O'Hallaron, David R. Ghattas, Omar Computer Science Department Carnegie Mellon University Pittsburgh PA 15213 United States Department of Electrical and Computer Engineering Carnegie Mellon University PA 15213 United States Institute for Computational Engineering and Sciences Dept. of Geol. Sciences Mechanical Engineering Computer Science and Biomedical Engineering University of Texas Austin TX 78712 United States

ISBN: (纸本)1595930612

We present a new methodology for generating and adapting octree meshes for terascale applications. Our approach combines existing methods, such as parallel octree decomposition and space-filling curves, with a set of new methods that address the special needs of parallel octree meshing. We have implemented these techniques in a parallel meshing tool called Octor. Performance evaluations on up to 2000 processors show that Octor has good isogranular scalability, fixed-size scalability, and absolute running time. Octor also provides a novel data access interface to parallel PDE solvers and parallel visualization pipelines, making it possible to develop tightly coupled end-to-end finite element simulations on terascale systems. © 2005 IEEE.

关键词： Parallel processing systems

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Toward 100 MHz frontier: Acousto-optic methods and fiber optic sensors in ultrasound metrology

Toward 100 MHz frontier: Acousto-optic methods and fiber opt...

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34th International Congress on Noise Control engineering 2005, INTERNOISE 2005

作者： Lewin, P.A. Umchid, S. Andrew Berger, W. Mu, C. Daryoush, A. El-Sherif, M. School of Biomedical Engineering Science and Health Systems Department of Electrical and Computer Engineering Drexel University Philadelphia PA 19104 United States Dept. of Physics and Electrical Engineering University of Scranton Scranton PA 18510-4642 United States

ISBN: (纸本)9781622763399

An increasing number of ultrasound diagnostic systems employ harmonic imaging, and center frequencies as high as 15 MHz are now commonly used in clinical practice. However, currently available hydrophone probes are not fully adequate to characterize the acoustic output of such nonlinear systems. This paper reviews the current status of piezoelectric polymer hydrophone probes and discusses their limitations in ultrasound field measurements (such as limited knowledge of the frequency responses beyond 20 MHz and physical dimensions leading to spatial averaging error). Against this background, a down-tapered fiber optic probe is presented as an alternative tool for probing ultrasound fields with ample bandwidth and without finite aperture effects. The results of the preliminary experiments indicate that once fully developed, the optic probe with a tip diameter of about 7 micrometers will provide a desirable and adequate device for ultrasound field measurements up to 100 MHz. The fiber optic probe could also meet the challenges posed by high intensity focused ultrasound (HIFU) and other therapeutic applications.

关键词： Hydrophones

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Techniques for DiffServ-based QoS in hierarchically federated MAN networks -the GRNET case

Techniques for DiffServ-based QoS in hierarchically federate...

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14th IEEE Workshop on Local and Metropolitan Area Networks, LANMAN 2005

作者： Varvitsiotis, Angelos P. Siris, Vasilios A. Primpas, Dimitris N. Fotiadis, Georgios I. Liakopoulos, Athanassios Ch. Bouras, Christos J. Greek Research and Technology Network Mesogeion 56 Athens GR 115 27 Dept. of Computer Science Institute of Computer Science University of Crete P.O. Box 1385 Heraklion Crete GR 711 10 Research Academic Computer Technology Institute Computer Engineering and Informatics Department University of Patras 61 Riga Feraiou Str. Patras GR 262 21

ISBN: (纸本)0780395654

DiffServ is the basis of contemporary QoS-enabled networks. Setting up DiffServ QoS requires extensive engineering effort in dimensioning and provisioning, especially for adjacent networks under different administrations linked in a "federated" hierarchy. In this paper we present a case study for QoS techniques employed in the GRNET MAN networks of Athens and Crete. After introducing the supported QoS mechanisms and service types, we discuss our dimensioning methodology and present two algorithms for worst-case dimensioning. We explain the provisioning mechanisms of GRNET and we present in brief our new automated provisioning ANS tool. Finally, we deal with the extension of our mechanisms and tools in hierarchically federated networks and give some future directions of our work.

关键词： Mobile telecommunication systems

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Prototype design of mobile emergency telemedicine system

Prototype design of mobile emergency telemedicine system

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International Conference on Computational science and Its Applications - ICCSA 2005

作者： Yoo, Sun K. Jung, S.M. Kim, B.S. Yun, H.Y. Kim, S.R. Kim, D.K. Dept. of Medical Engineering Yonsei Univ. College of Medicine 134 Shinchon-dong Seodaemun-ku Seoul Korea Republic of Graduate School of Biomedical Engineering Yonsei Univ. 134 Shinchon-dong Seodaemun-ku Seoul Korea Republic of Center for Emergency Medical Informatics Human Identification Research Institute Seoul Korea Republic of Dept. of Computer Science Dongduk Woman's Univ. Seoul Korea Republic of

High bit rate wireless cellular service using CDMA 1X-EVDO is now popular in Korea, particularly in urban areas, since it was launched commercially in 2002. This cellular service allows the real-time transmission of patient images and vital sign signals simultaneously in a moving ambulance application. In this paper, we designed a prototype emergency telemedicine system that can transfer both biological signal and patient motion video from a moving vehicle using a CDMA 1X-EVDO reverse link. To cope with the limited bandwidth of the reverse link (transmission bandwidth of cellular device) relative to the the forward link (receiving bandwidth), priority control between the vital sign and video images, frame rate control using MPEG-4 compression, and error control using automatic repeat request were incorporated into the application layer protocol of the designed prototype system. Many on-road experiments have been performed to evaluate the actual performance and to demonstrate the applicability in a real situation. In most cases, the biological signal and patient video images with reduced frame rate were successfully transmitted from the moving vehicle in urban areas © Springer-Verlag Berlin Heidelberg 2005.

关键词： Telemedicine

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Towards improved myoelectric prosthesis control: High density surface EMG recording after targeted muscle reinnervation

Towards improved myoelectric prosthesis control: High densit...

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2005 27th Annual International Conference of the engineering in Medicine and Biology Society, IEEE-EMBS 2005

作者： Ping, Zhou Lowery, Madeleine M. Dewald, Julius P.A. Kuiken, Todd A. Neural Engineering Center for Artificial Limbs Rehabilitation Institute of Chicago Chicago IL United States Dept. of Physical Medicine and Rehabilitation Northwestern University Chicago IL United States Electrical and Computer Engineering Department Northwestern University Chicago IL United States Biomedical Engineering Department Northwestern University Chicago IL United States Dept. of Physical Medicine and Human Movement Science Northwestern University Chicago IL United States

ISBN: (纸本)0780387406

The control of shoulder disarticulation prostheses remains a challenging problem. Recently, a novel method, using targeted muscle reinnervation to develop additional myoelectric control sites, has Improved the control of myoelectric upper limb prosthesis In a patient with bilateral amputations at the shoulder disarticulation level [1]. Encouraged by this achievement, we recorded high density surface electromyogram (EMG) signals from the patient's reinnervated muscles as he actuated a variety of different movements. We believe that the reinnervated muscle activation patterns revealed by the high density EMG recording have the potential to further improve the myoelectric prosthesis control. As the Initial stage of the study, this paper presents the experiment of high density surface EMG recording, the preliminary EMG data analysis and the framework for future investigation with advanced feature extraction and pattern recognition techniques. ©2005 IEEE.

关键词： Myoelectrically controlled prosthetics

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Progressive auction based resource allocation in service-oriented architecture

Progressive auction based resource allocation in service-ori...

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2005 IEEE International Conference on Services Computing, SCC 2005

作者： Huang, Shuqing Chen, Huimin Zhang, Liang-Jie Department of Electrical Engineering and Computer Science Tulane University New Orleans LA 70118 United States Department of Electrical Engineering University of New Orleans New Orleans LA 70148 United States Business Informatics Dept. IBM T.J. Watson Research Center 1101 Kitchawan Road Yorktown Heights NY 10598

ISBN: (纸本)0769524087

The emerging paradigm of distributed Web services has promised seamless business integration across the Internet that shares not only computing power but also applications. One major challenge is resource allocation to each end user in an economically efficient and low latency manner. A common solution is proportional sharing where each user gets his resource in proportion to the predetermined weight. However, this does not allow users to differentiate the value of their services and to dynamically adjust the weights. A resource reservation mechanism may improve the information and service sharing but usually introduces a high latency. In this paper, we propose a progressive auction based market mechanism for resource allocation that allows user differentiation of the service value and ensures the resource acquisition latency to be limited only to the communication delay in Service-Oriented Architecture (SOA) systems. We present a service sharing prototype for selecting services for further business process composition or solution creation and show experimental results on the formation of reliable user ranking in resource sharing through the progressive auction. © 2005 IEEE.

关键词： Resource allocation

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