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IEEE EMBS International Conference on Information technology Applications in Biomedicine (ITAB)

作者： Georgia Tsiliki Marina Ioannou Dimitris Kafetzopoulos Michalis Zervakis Elias Sanidas Eustathios Stathopoulos Manolis Tsiknakis FORTH Molecular Biology and Biotechnology IMBB Crete Greece Department of Electronic and Computer Engineering University Campus Crete Greece Medical School University of Crete Crete Greece Biomedical Informatics Laboratory Institute of Computer Science ICS Foundation for Research and Technology Hellas FORTH Crete Greece

An increasing number of studies have profiled gene expressions in tumor specimens using distinct microarray platforms and analysis techniques. With the accumulating amount of microarray data, one of the most challenging tasks is to develop robust statistical models to integrate their findings. We compare some recent methodologies on the field, with respect to ER status, and focus on a unified among platforms scale suggested by Parmigiani et al.(2002) and Shen et al.(2004), which is based on a Bayesian mixture model. Under this unified scale, we study the intensity similarities between four breast cancer data sets derived from various platforms. We evaluate our results with an independent data set in terms of ER sample clustering given the derived gene ER signatures of the integrated data. We found that intensity and fold-change variability similarities between different platform measurements can greatly assist the statistical analysis of independent microarray data sets.

关键词： Biomedical measurements Erbium Breast cancer Sequences Information analysis Gene expression Statistical analysis DNA Statistics Information technology

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Stimulation Effects of SmartBox for E-learning Using JXTA-Overlay P2P System

Stimulation Effects of SmartBox for E-learning Using JXTA-Ov...

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International Conference on Complex, Intelligent and Software Intensive Systems, CISIS

作者： Keita Matsuo Leonard Barolli Vladi Kolici Fatos Xhafa Akio Koyama Arjan Durresi Graduate School of Engineering Fukuoka Institute of Technology Fukuoka Japan Department of Information and Communication Engineering Fukuoka Institute of Technology Fukuoka Japan Department of Electronics and Telecommunication Polytechnic University of Tirana Tirana Albania Department of Languages and Informatics Systems Polytechnic University of Catalonia Barcelona Spain Department of Informatics Yamagata University Yonezawa Yamagata Japan Department of Computer and Information Science Indiana University-Purdue University Indianapolis Indianapolis IN USA

ISBN: (纸本)9781424435692

This work is motivated by the need to develop decentralized P2P approaches to support learning and teaching activity in virtual *** this paper, we present the stimulation effects of the SmartBox for e-learning using JXTA-overlay P2P system. We also show the design and implementation of the SmartBox environment that is used for stimulating the learners motivation to increase the learning efficiency. The SmartBox is integrated with our P2P system as a useful tool for monitoring and controlling learners' activity. We found by experimental results thatthe SmartBox is an effective way to increase the learner's concentration. We also investigated the relation between learner's body movement, concentration, and amount of study. We found that when the learner is solving more exerciseshe has more body *** shows that when the number of body movements is hight,the learner's concentration is high. We also consider the feasibility of our P2P platform to integrate different computational end-devices.

关键词： Electronic learning Electronic mail Information security Peer to peer computing Education Internet Web server informatics Control systems Application software

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Estimation of oxygen tension in retinal capillaries from phosphorescence lifetime images

Estimation of oxygen tension in retinal capillaries from pho...

引用

IEEE International Symposium on Biomedical Imaging

作者： Isa Yildirim Rashid Ansari Justin Wanek I. Samil Yetik Mahnaz Shahidi The Department of Electrical and Computer Engineering University of Illinois Chicago USA The Informatics Institute of Istanbul Technical University Istanbul TR Turkey The Department of Electrical and Computer Engineering University of Illinois Chicago IL The Department of Ophthalmology and Visual Sciences University of Illinois Chicago IL USA The Department of Ophthalmology and Visual Sciences University of Illinois Chicago IL Medical Imaging Research Center Illinois Institute of Technology Chicago IL

ISBN: (纸本)9781424439317

Investigating the effect of retinal oxygenation abnormalities in the development of common eye diseases requires accurate assessment of oxygen tension in retinal vasculatures. Estimation of oxygen tension in retinal capillaries using phosphorescence lifetime imaging is addressed in this paper. Separation from tissue and oxygen tension estimation is a more challenging task for capillaries when compared with large retinal vessels due to the finer structure and noise predominance in capillaries. An automated segmentation procedure is applied using the EM algorithm and noise contamination is reduced using a regularization method unlike previous approaches to capillary analysis where segmentation was done manually and noise contamination was ignored. We demonstrate the effectiveness of the proposed method by applying it to the retinal image data acquired from rat eyes, and we show that the oxygen tension estimate of retinal capillaries falls in the physiologically expected range.

关键词： Life estimation Lifetime estimation Retina Phosphorescence Image segmentation Noise reduction Contamination Diseases Retinal vessels Algorithm design and analysis

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Project Report: Toward the Realization of Highly Reliable Embedded Systems

Project Report: Toward the Realization of Highly Reliable Em...

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International Symposium on Object-Oriented Real-Time Distributed Computing

作者： Takuya Katayama Tomoji Kishi Shintaro Hosoai Tatsuo Nakajima Taiichi Yuasa Midori Sugaya Tomoharu Ugawa Japan Advanced Institute of Science and Technology Ishikawa Japan Department of Information Science Japan Advanced Institute of Science and Technology Ishikawa Japan Department of Computer Science and Engineering Waseda University Tokyo Japan Graduate School of Informatics Kyoto University Kyoto Japan Dependable Embedded OS R&D Center Japan Science and Technology Agency Tokyo Japan Department of Computer Science University of Electro-Communications Tokyo Japan

ISBN: (纸本)9781424435715

Our society depend on embedded and ubiquitous computing and the reliability of embedded software becomes more and more important. We have conducted a five years project with industries to develop software for realizing highly reliable embedded systems. We have tackled reliability issues from the following aspects. (1)Design environment: we have developed a UML design verification tool that apply model checking techniques to improve the design quality of application software. (2)Operating environment: we have developed operating system supports that realize multiple execution of real-time operating systems and also developed operating systems with enhanced resource management. Both technologies contribute the realization of robust run-time environment. (3) Real-time environment: we have developed real-time garbage collection techniques for Jave. They prevent the suspension of applications that violates the correct behavior of real-time applications. Also, they reduce the effort of application programmers to avoid garbage-collection during important execution timing. We have obtained fruitful results from these three research themes, and some of them are actually used in industries. Furthermore, we have integrated the results to make synergetic effect of them. In order to demonstrate the effectiveness, we have conduct an experiment. In this paper, we introduce the project and its results.

关键词： Embedded system Operating systems Embedded software Ubiquitous computing computer industry Unified modeling language Application software Real time systems Resource management Robustness

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Graph orientation to maximize the minimum weighted outdegree

Graph orientation to maximize the minimum weighted outdegree

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International Symposium on Parallel and Distributed Processing (IPDPS)

作者： Yuichi Asahiro Jesper Jansson Eiji Miyano Hirotaka Ono Department of Social Information Systems Kyushu Sangyo University Fukuoka Japan Ochanomizu University Bunkyo Tokyo Japan Department of Systems Design and Informatics Kyushu Institute of Technology Fukuoka Japan Department of Computer Science and Communication Engineering Kyushu University Fukuoka Japan

We study a new variant of the graph orientation problem called MAXMINO where the input is an undirected, edge-weighted graph and the objective is to assign a direction to each edge so that the minimum weighted outdegree (taken over all vertices in the resulting directed graph) is maximized. All edge weights are assumed to be positive integers. This problem is closely related to the job scheduling on parallel machines, called the machine covering problem, where its goal is to assign jobs to parallel machines such that each machine is covered as much as possible. First, we prove that MAXMINO is strongly NP-hard and cannot be approximated within a ratio of 2 = ¿ for constant ¿ > 0 in polynomial time unless P = NP, even if all edge weights belong to {2}, every vertex has degree at most three, and the input graph is bipartite or planar. Next, we show how to solve MAXMINO exactly in polynomial time for the special case in which all edge weights are equal to 1. This technique gives us a simple polynomial-time w max /w min - approximation algorithm for MAXMINO where w max and w min denote the maximum and minimum weights among all the input edges. Furthermore we also observe that this approach yields an exact algorithm for the general case of MAXMINO whose running time is polynomial whenever the number of edges having weight larger than w min is at most logarithmic in the number of vertices. Finally, we, show that MAXMINO is solvable in polynomial time if the input is a cactus graph.

关键词： Polynomials Parallel machines Approximation algorithms

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Naturally occurring data as research instrument: Analyzing examination responses to study the novice programmer

SIGCSE Bulletin Inroads

引用

SIGCSE Bulletin Inroads 2009年第4期41卷

作者： Clear, Tony Bouvier, Dennis J. Jacková, Jana Robbins, Phil Lister, Raymond Carter, Paul Lopez, Mike Seppälä, Otto Simon Eckerdal, Anna McCartney, Robert Thompson, Errol School of Comp. and Math. Sciences AUT University New Zealand Department of Computer Science Southern Illinois Univ. Edwardsville United States Faculty of Manag. Sci. and Informatics University of Zilina Slovakia Department of Computer Science University of British Columbia Canada Manukau Institute of Technology New Zealand Dept. of Computer Science and Engineering Helsinki University of Technology Finland Faculty of Science and IT University of Newcastle Australia Dept of Information Technology Uppsala University Sweden Dept Comp. Sci. and Engineering University of Connecticut United States United Kingdom

In New Zealand and Australia, the BRACElet project has been investigating students' acquisition of programming skills in introductory programming courses. The project has explored students' skills in basic syntax, tracing code, understanding code, and writing code, seeking to establish the relationships between these skills. This ITiCSE working group report presents the most recent step in the BRACElet project, which includes replication of earlier analysis using a far broader pool of naturally occurring data, refinement of the SOLO taxonomy in code-explaining questions, extension of the taxonomy to code-writing questions, extension of some earlier studies on students' 'doodling' while answering exam questions, and exploration of a further theoretical basis for work that until now has been primarily empirical.

关键词： Students

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Polytopic model reconstruction of a pneumatic positioning system

Polytopic model reconstruction of a pneumatic positioning sy...

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International Symposium on Applied Computational Intelligence and informatics ( SACI)

作者： Patricia Grof Zoltan Petres Janos Gyeviki Department of Mechatronics Optics and Information Engineering Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Cognitive Informatics Group Hungarian Academy of Sciences Computer and Automation Research Institute Budapest Hungary Department of Technical and Process Engineering University of Szeged Szeged Hungary

The main contribution of this paper to develop a mathematical model which describes the movement of a piston of pneumatic cylinder controlled by a proportional valve, keeping the non linear behavior of pneumatic system. The linear parameter varying (LPV) representations and linear matrix inequality (LMI) based analysis and system control design are in the focus of modern control theories.

关键词： Sliding mode control Engine cylinders Robust control Vectors Control systems Mathematical model Pistons Automatic control Valves Pneumatic systems

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Implementation of an E-learning System Using P2P, Web and Sensor Technologies

Implementation of an E-learning System Using P2P, Web and Se...

引用

International Conference on Advanced Information Networking and Applications (AINA)

作者： Keita Matsuo Leonard Barolli Fatos Xhafa Valadi Kolici Akio Koyama Arjan Durresi Rozeta Miho Graduate School of Engineering Fukuoka Institute of Technology Japan Department of Information and Communication Engineering FIT Fukuoka Japan Department of Languages and Informatics Systems Technical University of Catalonia Barcelona Spain Department of Electronics and Telecommunication Polytechnic University of Tirana Tirana Albania Department of Informatics Faculty of Engineering Yamagata University Yonezawa Yamagata Japan Department of Computer and Information Science Indiana University-Purdue University Indianapolis Indianapolis IN USA

This work is motivated by the need to develop decentralized P2P approaches to support learning and teaching activity in virtual universities. In this paper, we present the implementation of the JXTA-based e-learning P2P system. We also show the design and implementation of a SmartBox environment that will be used for stimulating the learners to increase the learning efficiency. The proposed e-learning P2P system is a useful tool for monitoring and controlling learnerspsila activity. We evaluate the proposed system by experimental results and show that proposed system has a good performance. In the future, we aim to use it in real virtual campus environments.

关键词： Electronic learning Sensor systems Electronic mail Information security Peer to peer computing Communication system control informatics Education Control systems Internet

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Common and distinct neural substrates of forward-chaining and backward-chaining syllogistic reasoning

Common and distinct neural substrates of forward-chaining an...

引用

IEEE/ICME International Conference on Complex Medical engineering, CME

作者： Xiuqin Jia Shengfu Lu Ning Zhong Yiyu Yao Kuncheng Li Yanhui Yang International WIC Institute Beijing University of Technology Beijing China International WIC Institute School of Electronics Information and Control Engineering Beijing University of Technology Beijing China Department of Life Science and Informatics Maebashi Institute of Technology Maebashi Japan Department of Computer Science University of Regina Regina Canada Xuanwu Hospital Capital Medical University Beijing China

Syllogistic reasoning is a form of deductive reasoning in which a logical conclusion is drawn from premises. Forward-chaining syllogistic reasoning refers to response pattern of figure 1 syllogism (M-P, S-M, S-P with response chain of S-M-P) and backward-chaining syllogistic reasoning refers to response pattern of figure 4 syllogism (P-M, S-M, S-P with response chain of P-M-S). Previous psychological studies show that forward-chaining is significantly higher accuracy and less response time, and backward-chaining is significantly lower accuracy and more response time. However, little is known about the underlying neural mechanisms. We carried out a study using event-related fMRI to clarify their neural substrates. Conjunction analysis showed common areas of activations were the bilateral caudate, the left ventral lateral prefrontal cortex (VLPFC), the left superior parietal lobule, and the right lingual gyrus. Direct comparisons showed distinct area of activation for forward-chaining in contrast to backward-chaining involved more activation in the left inferior parietal lobule, whereas backward-chaining in contrast to forward-chaining recruited the left dorsal lateral prefrontal cortex (DLPFC), the left medial frontal gyrus, and the right cerebellum. The results suggested that forward-chaining and backward-chaining syllogistic reasoning engaged distinct neural substrates based on common brain areas.

关键词： Delay Educational technology Hospitals Statistics Psychology Recruitment Brain Laboratories Control engineering informatics

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Vibro-tactile feedback for VR systems

Vibro-tactile feedback for VR systems

引用

Conference on Human System Interactions, HSI

作者： Gabor Sziebig Bjorn Solvang Csaba Kiss Peter Korondi Department of Industrial Engineering Narvik University College Narvik Norway Department of Automation and Applied Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary

Today, in production engineering we have already taken into usage complex virtual representations of the manufacturing environment were we can program, simulate, analyse and optimise key performances. Such systems are mainly working through keyboard/ mouse input while user feedback normally are direct visual through computer screen and text files. Such communication only relays on a limited spectre of our senses and the keyboard/mouse/screen systems cannot be said to be very human friendly, especially when the operator is expected to operate ldquoout of officerdquo in a unstructured, maybe dangerous or dirty, environment. In the near future we expect to see more advanced input/output devices like motion capturing and speech input systems while feedback will not be visual alone but include several other human senses. Combinatorial sensory information, interpreted by the human brain, becomes very handy when a stand alone sense is not enough to interpret the actual situation. Imitation of senses and feedback from virtual reality environments always meant a great problem. Realization of two (sight and hearing) out of the five human senses is indispensable. Simulation of these two senses is not complex issue; on the contrary the other three are quite challenging. This paper describes the development of a vibro-tactile glove which can provide sensory feedback from a virtual environment, either as a stand alone system but most important in combination with sight and audio feedback systems. Instead of implementing real force feedback, the focus is on tactile sensing, as an alternative way of achieving the same feedback. The glove contains six vibration motors on different locations on the hand. These locations include all five fingers, and the palm. Communication with the glove is wireless, enabling free movement for the user. The system is low cost and very small sized which allows for combining it with advanced input devices like a motion capturing suit.

关键词： Virtual reality Humans Keyboards Mice Force feedback Production engineering Virtual manufacturing Computational modeling Analytical models Performance analysis

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