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作者： Prendinger, Helmut Hyrskykari, Aulikki Nakayama, Minoru Istance, Howell Bee, Nikolaus Takahasi, Yosiyuki National Institute of Informatics 2-1-2 Hitotsubashi Chiyoda-ku Tokyo 101-8430 Japan Department of Computer Sciences University of Tampere 33014 Tampere Finland CRADLE Tokyo Institute of Technology Ookayama Meguro-ku Tokyo 152-8552 Japan School of Computing De Montfort University The Gateway Leicester LE1 9BH United Kingdom Institute of Computer Science University of Augsburg Eichleitnerstr. 30 86135 Augsburg Germany

Attentive user interfaces (AUIs) capitalize on the rich information that can be obtained from users' gaze behavior in order to infer relevant aspects of their cognitive state. Not only is eye gaze an excellent clue to states of interest and intention, but also to preference and confidence in comprehension. AUIs are built with the aim of adapting the interface to the user's current information need, and thus reduce workload of interaction. Given those characteristics, it is believed that AUIs can have particular benefits for users with severe disabilities, for whom operating a physical device (like a mouse pointer) might be very strenuous or infeasible. This paper presents three studies that attempt to gauge uncertainty and intention on the part of the user from gaze data, and compare the success of each approach. The paper discusses how the application of the approaches adopted in each study to user interfaces can support users with severe disabilities. © Springer-Verlag 2009.

关键词： User interfaces

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Semantic integration of cervical cancer data repositories to facilitate multicenter association studies: The ASSIST approach

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Cancer informatics 2009年第Semantic Technologie期8卷 31-44页

作者： Agorastos, Theodoros Koutkias, Vassilis Falelakis, Manolis Lekka, Irini Mikos, Themistoklis Delopoulos, Anastasios Mitkas, Pericles A. Tantsis, Antonios Weyers, Steven Coorevits, Pascal Kaufmann, Andreas M. Kurzeja, Roberto Maglaveras, Nicos Department of Obstetrics and Gynecology Papageorgiou General Hospital Aristotle University of Thessaloniki Greece Lab. of Medical Informatics Medical School Aristotle University of Thessaloniki Greece Department of Electrical and Computer Engineering Faculty of Engineering Aristotle University of Thessaloniki Greece Informatics and Telematics Institute Centre for Research and Technology Hellas Greece Department of Obstetrics and Gynecology Faculty of Medicine and Health Sciences Ghent University Belgium RAMIT Vzw C/o Department of Medical Informatics and Statistics Ghent University Hospital Ghent Belgium Gynäkologie Charité-Universitätsmedizin Berlin Germany

The current work addresses the unifi cation of Electronic Health Records related to cervical cancer into a single medical knowledge source, in the context of the EU-funded ASSIST research project. The project aims to facilitate the research for cervical precancer and cancer through a system that virtually unifi es multiple patient record repositories, physically located in different medical centers/hospitals, thus, increasing fl exibility by allowing the formation of study groups "on demand" and by recycling patient records in new studies. To this end, ASSIST uses semantic technologies to translate all medical entities (such as patient examination results, history, habits, genetic profi le) and represent them in a common form, encoded in the ASSIST Cervical Cancer Ontology. The current paper presents the knowledge elicitation approach followed, towards the defi nition and representation of the disease's medical concepts and rules that constitute the basis for the ASSIST Cervical Cancer Ontology. The proposed approach constitutes a paradigm for semantic integration of heterogeneous clinical data that may be applicable to other biomedical application domains.

关键词： Association studies Cervical cancer Coding systems Data unifi cation Semantic integration

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A design and implementation model for Web Caching using server 'URL Rewriting'

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World Academy of Science, Engineering and technology 2009年 36卷 303-308页

作者： Saleh, Mostafa E. Abdel Nabi, A. Baith Mohamed, A. Integrated Simulators Complex Arab Academy for Science and Technology Alex Egypt Informatics Institute Scientific Research and Technology Applications Egypt Computer Engineering Department Arab Academy for Science and Technology Alexandria Egypt

In order to make surfing the internet faster, and to save redundant processing load with each request for the same web page, many caching techniques have been developed to reduce latency of retrieving data on World Wide Web. In this paper we will give a quick overview of existing web caching techniques used for dynamic web pages then we will introduce a design and implementation model that take advantage of 'URL Rewriting' feature in some popular web servers, e.g. Apache, to provide an effective approach of caching dynamic web pages.

关键词： Websites

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USB flash drives as an energy efficient storage alternative

USB flash drives as an energy efficient storage alternative

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International Workshop on Grid Computing

作者： Olga Mordvinova Julian Martin Kunkel Christian Baun Thomas Ludwig Marcel Kunze Department of Computer Science University of Heidelberg Heidelberg Germany Institute for Scientific Computing Karlsruhe Institute of Technology Karlsruhe Germany Department of Informatics University of Hamburg Hamburg Germany

Increasing energy costs and the trend to green solutions are generating growing interest in eco-friendly computing. Flash storage technology satisfies low-energy requirements and falling prices for flash storage have recently made it possible to replace conventional hard disks with solid state drives. These can provide higher performance when deployed properly but they are still too expensive for the low-cost server market. In this paper we analyze inexpensive flash drives and conventional hard drives with a focus on energy efficiency. Our main goal is to decide whether replacing hard drives with USB flash drives is a reasonable and economic way to build energy-efficient servers. Our evaluation shows that despite the high throughput of hard disks, flash drives have a better performance per joule. In some cases, inexpensive USB flash can compete not only with hard disks but also with solid state drives.

关键词： Universal Serial Bus Energy efficiency Energy storage Hard disks Drives Solid state circuits Costs Power generation economics Environmental economics Throughput

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On a small gain theorem for ISS networks in dissipative Lyapunov form

On a small gain theorem for ISS networks in dissipative Lyap...

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European Control Conference (ECC)

作者： Sergey Dashkovskiy Hiroshi Ito Fabian Wirth Department of Mathematics and Computer Science University of Bremen Germany Department of Systems Design and Informatics Kyushu Institute of Technology Japan Institute of Mathematics University of Würzburg Germany

In this paper we consider several interconnected ISS systems supplied with ISS Lyapunov functions defined in the dissipative form. Our aim is to construct an ISS Lyapunov function for the interconnection. We provide a condition of a small gain type under which this construction is possible and describe a method of an explicit construction of such an ISS Lyapunov function.

关键词： Lyapunov methods Vectors Interconnected systems Trajectory Linear matrix inequalities Europe Stability analysis

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DBLP-SSE: A DBLP Search Support Engine

DBLP-SSE: A DBLP Search Support Engine

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IEEE WIC ACM International Conference on Web Intelligence (WI)

作者： Yi Zeng Yiyu Yao Ning Zhong International WIC Institute Beijing University of Technology Beijing China Department of Computer Science University of Regina Regina SAS Canada Department of Life Science and Informatics Maebashi Institute of Technology Maebashi Japan

A Search Support Engine (SSE) is implemented based on the basic principles of Information Retrieval Support Systems (IRSS) and Information Seeking Support Systems (ISSS). An SSE aims at meeting the diversity needs from different users, providing various supporting functionalities, tools, etc. for users to perform various tasks beyond the traditional search and browsing provided by current search engines. As an illustrative example, we developed a DBLP search support engine (DBLP-SSE), and we discuss some concrete supporting functionalities, namely, search refinement support, domain analysis support, etc. Each of the functionality focus on a unique perspective supporting users finding useful information and knowledge from the DBLP dataset. The search support engine can be considered as a step towards Knowledge Retrieval (KR) and Web Intelligence (WI).

关键词： Search engines Information retrieval Concrete Intelligent agent Navigation Conferences computer science informatics Web search Visualization

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A preemptive scheduling scheme for flexible QoS provisioning in OBS networks

A preemptive scheduling scheme for flexible QoS provisioning...

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International Conference on Broadband Networks (BroadNets)

作者： Kostas Ramantas Tito Raul Vargas Juan Carlos Guerri Kyriakos Vlachos Computer Engineering and Informatics Department & Research Academic Computer Technology Institute University of Patras Rio Greece Instituto de Telecomunicaciones y Aplicaciones Multimedia Universidad Politecnica de Valencia Valencia Spain

In optical burst switching (OBS) networks one of the most challenging problems is to provide service differentiation. The lack of buffering in the intermediate nodes, makes QoS provisioning in OBS networks a difficult problem to address. In this work, we propose a scheduling algorithm that supports QoS based on preemptions, which are controlled by a novel preemption policy. Our claims are validated by analytical modelling and experimental analysis through simulations using data belonging to two different classes of service - best effort and video streaming data. Performance evaluation is based on throughput measurements for best effort class, and perceived quality metrics like PSNR and MOS scores for the video streaming class.

关键词： Quality of service Telecommunication traffic Traffic control Scheduling algorithm Streaming media Processor scheduling computer networks Optical computing Telecommunication computing Optical burst switching

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Safe Mobile Robot Control in the iSpace Environment

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IFAC Proceedings Volumes 2009年第16期42卷 305-310页

作者： Laszlo A. Jeni Peter Korondi Zoltan Istenes Hideki Hashimoto University of Tokyo Institute of Industrial Science Tokyo Japan (Tel: 81+3-5452-6258) Computer and Automation Research Institute of the Hungarian Academy of Sciences Department of Mechatronics Optics and Applied Informatics Budapest University of Technology and Economics Eotvos Lorand University Faculty of Informatics

Abstract Robots and other intelligent systems in human environment need high-level cognitive capabilities to enable the achievement of complex goals in complex environments using limited computational resources. Robotic cognitive capabilities include attention allocation, planning, perception processing, reasoning about the other agents and the environment. This paper presents an approach for safe robot controlling using the Intelligent Space. In the iSpace networked distributed sensors observe and gather information from the space. In this environment mobile robots can be tracked with ultrasonic positioning system, the topological map can be build using laser range finders and other properties of the space can be recognized. The recognized properties of the space and the mobile code technology make it possible to extend the control framework of mobile robots with components in a safe way. The mobile code is a program-component obtained from a remote system, transferred across a network and dynamically downloaded and executed on the robots. This code is created, verified, stored and transmitted to the robot using the Certified Proved-Property-Carrying Code architecture, where properties and their proofs also attached to the code. The receiver can verify the proofs and it can decide whether to use or to refuse the received mobile component.

关键词： Intelligent Space recognition CPPCC mobile code mobile robots requirement verification

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Moment curves

Moment curves

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Pacific (formerly Asia-Pacific APVIS) Visualization Symposium

作者： Daniel Patel Martin Haidacher Jean-Paul Balabanian Eduard M. Groller Christian Michelsen Research Bergen Norway Institute of Computer Graphics and Algorithms University of Technology Vienna Austria Department of Informatics University of Bergen Bergen Norway

We define a transfer function based on the first and second statistical moments. We consider the evolution of the mean and variance with respect to a growing neighborhood around a voxel. This evolution defines a curve in 3D for which we identify important trends and project it back to 2D. The resulting 2D projection can be brushed for easy and robust classification of materials and material borders. The transfer function is applied to both CT and MR data.

关键词： Transfer functions Histograms Image processing computer graphics Noise robustness informatics Computed tomography Image segmentation Volume measurement Material properties

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Combining multimodal and temporal contextual information for semantic video analysis

Combining multimodal and temporal contextual information for...

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IEEE International Conference on Image Processing

作者： Georgios Th. Papadopoulos Vasileios Mezaris Ioannis Kompatsiaris Michael G. Strintzis Informatics and Telematics Institute Centre of Research and Technology Greece Information Proc. Laboratory Electrical & Computer Engineering Department Aristotle University of Thessaloniki Greece

In this paper, a graphical modeling-based approach to semantic video analysis is presented for jointly realizing modality fusion and temporal context exploitation. Overall, the examined video sequence is initially segmented into shots and for every resulting shot appropriate color, motion and audio features are extracted. Then, Hidden Markov Models (HMMs) are employed for performing an initial association of each shot with the semantic classes that are of interest separately for every modality. Subsequently, an integrated Bayesian Network (BN) is introduced for simultaneously performing information fusion and temporal contextual knowledge exploitation, contrary to the usual practice of performing each task separately. The final outcome of the overall video analysis approach is the association of a semantic class with every shot. Experimental results as well as comparative evaluation from the application of the proposed approach in the domain of news broadcast video are presented.

关键词： Information analysis Context modeling Hidden Markov models Feature extraction Data mining Video sequences Gunshot detection systems Multimedia communication Broadcasting Motion analysis

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