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8th IEEE International Conference on BioInformatics and Bioengineering, BIBE 2008

作者： Cataldo, Santa Di Ficarra, Elisa Acquaviva, Andrea Macii, Enrico Dep. of Control and Computer Engineering of Politecnico di Torino Italy Dep. of Computer Science Universita di Verona Italy

ISBN: (纸本)9781424428458

In this paper we present a fully automated morphology-based technique for segmentation of nuclei in cancer tissue images and we compare it with a common technique for biomedical image processing, namely active contours. We discuss the limitations of active contours in the processing of immunohistochemical images characterized by heterogeneously stained nuclear region and noise caused by the presence of multiple tissue layers in the sample. We describe the integration of the proposed approach in a fully automated protein activity quantification tool. Finally, we demonstrate and motivate through extensive experiments that our fully automated morphology-based approach provides better accuracy compared to various active contours implementations.

关键词： Morphology

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Fully-automated segmentation of tumor areas in tissue confocal images: Comparison between a custom unsupervised and a supervised SVM approach

Fully-automated segmentation of tumor areas in tissue confoc...

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BIOSIGNALS 2008 - 1st International Conference on Bio-inspired Systems and Signal Processing

作者： Cataldo, Santa Di Ficarra, Elisa Macii, Enrico Dep. of Control and Computer Engineering Politecnico di Torino Cso Duca degli Abruzzi 24 10129 Torino Italy

ISBN: (纸本)9789898111180

In this paper we present a fully-automated method for the detection of tumor areas in immunohistochemical confocal images. The image segmentation provided by the proposed technique allows quantitative protein activity evaluation on the target tumoral tissue disregarding tissue areas that are not affected by the pathology, such as connective tissue. The automated method, that is based on an innovative unsupervised clustering approach, enables more accurate tissue segmentation compared to traditional supervised methods that can be found in literature, such as Support Vector Machine (SVM). Experimental results conducted on a large set of heterogeneous immunohistochemical lung cancer tissue images demonstrate that the proposed approach overcomes the performance of SVM by 8%, achieving on average an accuracy of 90%.

关键词： Support vector machines

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Motivation and Competitive Learning in a Social Robot

Motivation and Competitive Learning in a Social Robot

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IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Dominguez, Salvador Zalama, Eduardo Garcia-Bermejo, Jaime G. Pulido, Jaime CARTIF Foundation Robotics Computer Vision and Real Time Division Boecillo Valladolid Spain University of Valladolid (Spain) Dep. of Systems Engineering and Automatic Control Industrial Engineering School Spain

ISBN: (纸本)9781424420575

This paper describes the motivation and learning subsystems of Arisco which is a mechatronic head with interactive capacity which includes high expressivity through gesturing, voice recognition, text to speech generation, visual tracking, and internet information retrieval. The general architecture is first described in the paper. Then, the learning capacity of Arisen is addressed. It learns and performs associations between different stimulus responses through several dynamic neural networks, guided by motivational drives. A number of experiments are discussed, covering stimulus competition, habituation, classical and operant conditioning.

关键词： Social robot learning interaction computer vision motivation

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Nano fiber with a metal clad

Nano fiber with a metal clad

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Asia Optical Fiber Communication and Optoelectronic Exposition and Conference, AOE 2008

作者： Hosseini Farzad, M. Ranjbar, M. Mazaheri Far, H. Physics Department-Shiraz University Iran Electrical and Computer Engineering National University of Singapore Singapore Electrical Engineering Dep. Shiraz University Iran

We show that the propagated beams in the Silicon nano fiber with a Silver clad are localized at two metal-dielectric interfaces with a sub-wavelength diameter. We promise this nano fiber acts as an optical sensor. ... 详细信息

ISBN: (纸本)9781557528636

关键词： Optical fibers

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LAD: A Routing Algorithm to Prolong the Lifetime of Wireless Sensor Networks

LAD: A Routing Algorithm to Prolong the Lifetime of Wireless...

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IEEE International Conference on Networking, Sensing and control

作者： Mohsen Mollanoori Nasrollah M. Charkari Department of Electrical and Computer Engineering Tarbiat Moalem University Iran Dep. of Electrical and Computer Engineering Tarbiat Modares University

As nodes in wireless sensor networks are usually supplied by a simple non rechargeable battery, the energy available in these nodes is very limited. Moreover, this limited energy is mostly consumed in transmission and reception of data. As transmission and reception is highly affected by routing algorithms, designing a proper routing algorithm will prolong the network lifetime. In this paper we proposed a novel routing algorithm, called locality-aware diffusion (LAD) that leverages spatial locality of sensed data in sensor networks to reduce energy consumption and prolong the network lifetime. The proposed algorithm is an extension to shortest path tree which is a common approach in routing algorithms. Simulation results show the validity and effectiveness of the proposed algorithm.

关键词： Routing Wireless sensor networks Energy consumption Sensor phenomena and characterization Algorithm design and analysis Costs Batteries computer networks Power engineering and energy Broadcasting

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Towards a framework for analysis of biophotonic images of mouse models of cancer

Towards a framework for analysis of biophotonic images of mo...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Vidya Kamath Dmitry Goldgof Raul Argilagos Lori Hazlehurst Steven Eschrich Biomedical Engineering program University of South Florida USA Department of Computer Science University of South Florida USA Department of Interdisciplinary Oncology Moffitt Cancer Center and College of Medicine University of South Florida USA Dep. of Interdisciplinary Oncology H. Lee Moffitt Cancer Center and College of Medicine University of South Florida USA

Biophotonic imaging can be used to characterize tumor growth in animal models. Estimation of the numbers and location of target cells is dep.ndent on accurate segmentation of a target region from the background luminescence of the animal body. Existing software systems extract general regions of interest in complex images but can fail to detect details or faint regions of interest in the presence of higher luminescent activity. Limited work has been published in the analysis of these images. We explore the use of popular medical image segmentation techniques in segmentation of bioluminescence images. The ability of each algorithm in detecting regions of interest is tested using established performance measures. Based on the characteristics of bioluminescence images of animal tumor models, and the performance of the algorithms, we formulate a framework for segmentation techniques best suited for this application.

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Motivation and Competitive Learning in a Social Robot

Motivation and Competitive Learning in a Social Robot

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2008 IEEE/RSJ International Conference on Intelligent Robots and Systems, Pages 3661-4172

作者： Salvador Dominguez Eduardo Zalama Jaime G. Garcia-Bermejo Jaime Pulido Robotics Computer Vision and Real Time Division CARTIF Foundation Boecillo Valladolid Spain DepDepartment of Systems Engineering and Automatic Control Industrial Engineering School University of Valladolid Spain University of Valladolid (Spain) Dep. of Systems Engineering and Automatic Control Industrial Engineering School Comput. Vision & Real Time Div. CARTIF Found. Valladolid

ISBN: (纸本)9781424420575

This paper describes the motivation and learning subsystems of Arisco which is a mechatronic head with interactive capacity which includes high expressivity through gesturing, voice recognition, text to speech generation, visual tracking, and internet information retrieval. The general architecture is first described in the paper. Then, the learning capacity of Arisco is addressed. It learns and performs associations between different stimulus responses through several dynamic neural networks, guided by motivational drives. A number of experiments are discussed, covering stimulus competition, habituation, classical and operant conditioning.

关键词： Social robot learning interaction computer vision motivation

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Sound focused personal audio system design: Performance improvement in acoustic contrast control by spatial weighting for obtaining spatially averaged acoustic potential energy

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The Journal of the Acoustical Society of America 2008年第5_SUPPLEMENT期123卷 3652-3652页

作者： Jin‐Young Park Ji‐Ho Chang Chan‐Hui Lee Yang‐Hann Kim Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology Dep. of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea jypark1979@kaist.ac.kr Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology Dep. of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea chang.jiho@*** Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology Dep. of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea Chance99@kaist.ac.kr Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology 4114 Department of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea yanghannkim@kaist.ac.kr

In acoustic contrast control [J.‐W. Choi and Y.‐H. Kim, J. Acoust. Soc. Am. 111. 1695 (2002)], spatially averaged acoustic potential energy is used as a representative spatial parameter because acoustic contrast control aims to maximize spatially averaged acoustic potential energy ratio between acoustically bright and dark zone. Therefore, spatial averaging process should be concerned carefully because control performance is sensitive to how to determine bright and dark zone. We have already got successful result in feasibility study for personal audio system with over 20dB difference between bright (frontal) and dark (side) zone [C.‐H. Lee et al., J. Acoust. Soc. Am. 111, 3053 (2007)], without any spatial weighting in spatial averaging of acoustic potential energy. Recently, we're trying to improve the control performance by giving spatial weighting in spatial averaging process because how to give spatial weighting has to do with the improvement of control performance to satisfy the original purpose of personal audio system more closely. In this paper, it will be covered the investigation for how to give spatial weighting in averaging process and shown experimental evaluations for a sound focused personal audio system. [Supported by the Korea Science and engineering Foundation (KOSEF) through the National Research Lab. Program funded by the Ministry of Science and Technology (M10500000112‐05J0000‐11210)]

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Compressed sensing for ultrawddeband impulse radio

Compressed sensing for ultrawddeband impulse radio

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2007 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '07

作者： Paredes, Jose L. Arce, Gonzalo R. Zhongmin, Wang Electrical Engineering Department Universidad de Los Andes Venezuela Dep. of Electrical and Computer Eng. University of Delaware United States

ISBN: (纸本)1424407281

In this paper, ultrawideband (UWB) channel estimation based on the novel theory of Compressive Sensing (CS) is developed. The proposed approach relies on the fact that transmitting an ultra-short UWB pulse through a multipath channel leads to a received UWB signal that can be approximated by a linear combination of a few atoms from a pre-defined dictionary, yielding thus a sparse representation of the received signal. The CS reconstruction capabilities are exploited to recover the composite pulse-multipath channel from a reduced set of random projections using the Matching Pursuit algorithm. This reconstructed signal is subsequently used as a referent template in a correlator based detector. Extensive simulations show that for different propagation scenarios and UWB communication environments, the CS detector outperforms traditional correlators using just 1/3 of the sampling rate leading thus to a reduced use of analog-to-digital resources in the channel estimation stage. © 2007 IEEE.

关键词： Channel estimation

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Sound localization in multiple regions: theory and applications

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The Journal of the Acoustical Society of America 2008年第5_SUPPLEMENT期123卷 3652-3652页

作者： Yang‐Hann Kim Ji‐Ho Chang Jin‐Young Park Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology 4114 Department of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea yanghannkim@kaist.ac.kr Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology Dep. of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea chang.jiho@*** Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology Dep. of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea jypark1979@kaist.ac.kr

It is often required to have several listening zones, which allows us to have different sounds that we select. For example, in a room, someone wants to listen sound from TV set, and other wants to listen music. In a car, a driver might wants to hear the information coming from his/her navigator system, and the passenger at the back side wants have a quiet zone so that he/she can sleep. To accomplish this kind of acoustic zones, we need to generate multiple sound zones by using multiple speakers. The performance has to be evaluated in accordance with how well one can listen the sound that is expected to have. We proposed to maximize the acoustic contrast between the zones that are defined. The basic concept associated with this approach was proposed by Choi and Kim [J. Acoust. Soc. Am., Vol.111(4), 1695‐1700, Apr. 2002.], but this paper extend this fundamental idea to multiple zone cases. Theoretical formulation which shows what we have proposed is well addressed and several practical cases, including car audio system will be demonstrated. [This work was supported by the Korea Science and engineering Foundation (KOSEF) through the National Research Lab. Program funded by the Ministry of Science and Technology (M10500000112‐05J0000‐11210)]

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