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检索条件"机构=Department of Information Systems Data and Knowledge Engineering"

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08391 - Working Group Summary Analyzing Tag Semantics Across Collaborative Tagging systems - Dagstuhl Seminar - Dagstuhl S

08391 - Working Group Summary Analyzing Tag Semantics Across...

引用

Social Web Communities 2008

作者： Benz, Dominik Grobelnik, Marko Hotho, Andreas Jäschke, Robert Mladenic, Dunja Servedio, Vito D. P. Sizov, Sergej Szomszor, Martin Knowledge & Data Engineering Group University of Kassel Germany Department of Knowledge Technologies J. Stefan Institute Ljubljana Slovenia Research Center L3S Hannover Germany La Sapienza University of Rome Italy Information Systems and Semantic Web University of Koblenz-Landau Germany University of Southampton United Kingdom

The objective of our group was to exploit state-of-the-art information Retrieval methods for finding associations and dependencies between tags, capturing and representing differences in tagging behavior and vocabulary of various folksonomies, with the overall aim to better understand the semantics of tags and the tagging process. Therefore we analyze the semantic content of tags in the Flickr and Delicious folksonomies. We find that: tag context similarity leads to meaningful results in Flickr, despite its narrow folksonomy character;the comparison of tags across Flickr and Delicious shows little semantic overlap, being tags in Flickr associated more to visual aspects rather than technological as it seems to be in Delicious;there are regions in the tag-tag space, provided with the cosine similarity metric, that are characterized by high density;the order of tags inside a post has a semantic relevance. © 2008 Dagstuhl Seminar Proceedings. All rights reserved.

关键词： Semantics

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Power conservation for strongly connected topology control in wireless sensor network

Power conservation for strongly connected topology control i...

引用

1st ACM International Workshop on Foundations of Wireless Ad Hoc and Sensor Networking and Computing 2008, FOWANC'08

作者： Li, Deying Du, Hongwei Chen, Wenping School of Information Renmin University of China Key Laboratory of Data Engineering and Knowledge Engineering Beijing 100872 China Department of Computer Science City University of Hong Kong Kowloon Hong Kong School of Information Renmin University of China Beijing 100872 China

ISBN: (纸本)9781605581491

Topology control is one of the most elementary topics in wireless sensor networks. Typically, most of the research only considered the bidirectional communication and symmetric weighted communication model, while the real wireless world contains not only bidirectional but also unidirectional communication links and asymmetric weighted communication model. In this paper, we present two heuristics for the minimum power topology control problem on general model, i.e., given a set of sensors in the Euclidean plane and a transmission power threshold for each directed pair of sensors, to find a power assignment for each sensor to achieve a strong connectivity with minimum total transmission power. Extensive results in simulation evaluate the efficiency of the proposed algorithms. Copyright 2008 ACM.

关键词： Wireless sensor networks

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SocialWeb Communities Executive Summary of the Dagstuhl Seminar

SocialWeb Communities Executive Summary of the Dagstuhl Semi...

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Social Web Communities 2008

作者： Alani, Harith Staab, Steffen Stumme, Gerd Address Harith Research Group ISWeb - Information Systems and Semantic Web University of Koblenz-Landau Univ.str. 1 Koblenz56016 Germany Knowledge & Data Engineering Group Department of Mathematics and Computer Science University of Kassel Wilhelmshöher Allee 73 Kassel34121 Germany

Blogs, Wikis, and Social Bookmark Tools have rapidly emerged on the Web. The reasons for their immediate success are that people are happy to share information, and that these tools provide an infrastructure for doing so without requiring any specific skills. At the moment, there exists no foundational research for these systems, and they provide only very simple structures for organising knowledge. Individual users create their own structures, but these can currently not be exploited for knowledge sharing. The objective of the seminar was to provide theoretical foundations for upcoming Web 2.0 applications and to investigate further applications that go beyond bookmark- and file-sharing. The main research question can be summarized as follows: How will current and emerging resource sharing systems support users to leverage more knowledge and power from the information they share on Web 2.0 applications? Research areas like Semantic Web, Machine Learning, information Retrieval, information Extraction, Social Network Analysis, Natural Language Processing, Library and information Sciences, and Hypermedia systems have been working for a while on these questions. In the workshop, researchers from these areas came together to assess the state of the art and to set up a road map describing the next steps towards the next generation of social software. © 2008 Dagstuhl Seminar Proceedings. All rights reserved.

关键词： Natural language processing systems

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Improving the execution of clinical guidelines and temporal data abstraction in high-frequency domains

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作者： Seyfang, Andreas Paesold, Michael Votruba, Peter Miksch, Silvia Institute of Software Technology and Interactive Systems Vienna University of Technology Favoritenstraße 9-11/E188 A-1040 Vienna Austria Department of Information and Knowledge Engineering Danube-University Krems Austria

ISBN: (纸本)9781586038731

The execution of clinical guidelines and protocols (CGPs) is a challenging task in high-frequency domains such as Intensive Care Units. On the one hand, sophisticated temporal data abstraction is required to match the low-level information from monitoring devices and electronic patient records with the high-level concepts in the CGPs. On the other hand, the frequency of the data delivered by monitoring devices mandates a highly efficient implementation of the reasoning engine which handles both data abstraction and execution of the guideline. The language Asbru represents CGPs as a hierarchy of skeletal plans and integrates intelligent temporal data abstraction with plan execution to bridge the gap between measurements and concepts in CGPs. We present our Asbru interpreter, which compiles abstraction rules and plans into a network of abstraction modules by the system. This network performs the content of the plans triggered by the arriving patient data. Our approach evaluated to be efficient enough to handle high-frequency data while coping with complex guidelines and temporal data abstraction. © 2008 The authors and IOS Press. All rights reserved.

关键词： Decision support systems

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Log-Polar transform in 3D environment

Log-Polar transform in 3D environment

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International Conference on Control, Automation, Robotics and Vision (ICARCV)

作者： Takayuki Nakata Yue Bao Department of Information Systems Engineering Totama Prefectural University Toyama Japan Faculty Of Knowledge Engineering Masashi Institute of Technology Tokyo Japan

Log-Polar transform is mentioned as one of the models of the central-fovea visual sensor in a creature sight. Up to now, in the field of image recognition, Log-Polar transform is known widely and is especially used well in recognition of face images. However, since it is the recognition method only to a scaling and a rotation, it mainly remains in application in a 2D space. In this paper, a new Log-Polar transform algorithm which can detect even affine transform parameters is proposed, and this algorithm is expand so that perspective transform invariant can be detected. By using this transform, the pattern recognition within 3D space is possible.

关键词： Image recognition Face recognition Face detection Pattern recognition

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Syntactical negation detection in clinical practice guidelines

Syntactical negation detection in clinical practice guidelin...

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作者： Gindl, Stefan Kaiser, Katharina Miksch, Silvia Institute of Software Technology and Interactive Systems Vienna University of Technology Vienna Austria Department of Information and Knowledge Engineering Danube University Krems Krems Austria Institute of Software Technology and Interactive Systems Vienna University of Technology Favoritenstrasse 9-11/188 A-1040 Vienna Austria

ISBN: (纸本)9781586038649

In clinical practice guidelines (CPGs) the medical information is stored in a narrative way. A large part of this information occurs in a negated form. The detection of negation in CPGs is an important task since it helps medical personnel to identify not occurring symptoms and diseases as well as treatment actions that should not be accomplished. We developed algorithms capable of Negation Detection in this kind of medical documents. According to our results, we are convinced that the involvement of syntactical methods can improve Negation Detection, not only in medical writings but also in arbitrary narrative texts. © 2008 Organizing Committee of MIE 2008. All rights reserved.

关键词： Natural language processing systems

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On the generality of the evolved driving rules of an agent operating a model of a car

On the generality of the evolved driving rules of an agent o...

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Congress on Evolutionary Computation

作者： Hirotaka Yamazaki Ivan Tanev Tomoyuki Hiroyasu Katsunori Shimohara Department of Knowledge Engineering and Computer Sciences Doshisha University Kyoto Japan Department of Information Systems Design Doshisha University Kyoto Japan

We present an approach for automated evolutionary design of the functionary of driving agent, able to operate a software model of fast running car. The objective of our work is to automatically discover a set of driving rules (if existent) that are general enough to be able to adequately control the car in all sections of predefined circuits. In order to evolve an agent with such capabilities, we propose an indirect, generative representation of the driving rules as algebraic functions of the features of the current surroundings of the car. These functions, when evaluated for the current surrounding of the car yield concrete values of the main attributes of the driving style (e.g., straight line velocity, turning velocity, etc.), applied by the agent in the currently negotiated section of the circuit. Experimental results verify both the very existence of the general driving rules and the ability of the employed genetic programming framework to automatically discover them. The evolved driving rules offer a favorable generality, in that a single rule can be successfully applied (i) not only for all the section of a particular circuit, but also (ii) for the sections in several a priori defined circuits featuring different characteristics.

关键词： Integrated circuit modeling Turning Evolution (biology) Software Wheels Evolutionary computation Adaptation model

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Metamodeling for Community Coordinated Multimedia and Experience on Metamodel-Driven Content Annotation Service Prototype

Metamodeling for Community Coordinated Multimedia and Experi...

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Congress on Services - Part II (SERVICES-2)

作者： Jiehan Zhou M. Rautiainen M. Ylianttila M. Foulonneau P. Blandin MediaTeam Information processing laboratoryDepartment of Electrical and Information Engineering University of Oulu Finland Reference modelling / Knowledge systems Centre Henri Tudor Luxembourg Luxembourg

Community Coordinated Multimedia (CCM) provides an extended and enhanced human experience by collaboratively consuming electronic and networked content and multimedia-intensive services. Community coordinated multimedia vision raises the challenges of multimedia content creation, interpretation, exchange, and consumption over a large range of heterogeneous services, terminals and networks. The development of CCM metamodel plays a key role in tackling these challenges by enabling the transparent multimedia aggregation and exchange crossing communities. This paper aims to design and develop the CCM metamodel. A generic terminology for CCM metamodeling is developed. A extensive study on metamodeling activities and metamodeling methodologies is presented. A combined metamodeling approach is proposed for the CCM metamodel development. Experiences and results on the CCM metamodeling and CCM metamodel-driven content annotation prototype are elaborated.

关键词： Metamodeling Prototypes Terminology Multimedia systems knowledge based systems Collaboration Ontologies MPEG 7 Standard Collaborative software Application software

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Experience Co-Creation on Ubiquitous Cultural e-Service Provision: A Case of Taiwan's Hakka Culture

Experience Co-Creation on Ubiquitous Cultural e-Service Prov...

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International Conference on Networked Computing and Advanced information Management (NCM)

作者： Yuan-Chu Hwang Yuan-Chun Hwang Chiu-Hung Su Knowledge Engineering and Discovery Research Institute Auckland University of Technology New Zealand Department of Management Information Systems National Chengchi University Taiwan Department of Information Management National United University Taiwan

This paper proposes a collaborative experience based travel recommendation service for Hakka culture. This service utilizes mobile devices as platform to share and purify the user's knowledge of Hakka culture. By applying TF-IDF conversion on tags that were extracted from users' experience and past knowledge, in this paper we argue that a better recommendation service can be provided compared to the traditional frequency based service. Possible AI approach for utilizing the TF-IDF data is also proposed to improve the service level by using online adaptive clustering algorithm without increasing the resource requirements.

关键词： Cultural differences Mobile handsets Clustering algorithms Collaboration Organizations Global communication Clustering methods

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Easing the Formalization of Clinical Guidelines with a User-tailored, Extensible Agile Model Driven Development (AMDD)

Easing the Formalization of Clinical Guidelines with a User-...

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21st IEEE International Symposium on Computer-Based Medical systems (CBMS 2008)

作者： Patrick Martini Katharina Kaiser Silvia Miksch Institute of Software Technology & Interactive Systems University of Technology Vienna Vienna Austria Department of Information and Knowledge Engineering Danube-University of Krems Krems Austria

Transforming a text-based clinical guideline in a computer-interpretable form is a time-consuming and demanding task due to the various users involved, who have different technical and medical background. In the past, different guideline representation languages and supporting tools have been developed, however, these approaches seldom address the various users' demands and needs in the different steps of the guidelines' life cycle. Our approach is oriented on the guideline life-cycle and takes the requirements and the interactions of the various actors into account to formalize guidelines in a computer-interpretable guideline representation by using a semi-automatic way based on NLP techniques. We analyzed the guideline lifecycle and the roles of the actors to build such a model. This model is prototypical implemented and showed the usefulness and utility for the various users.

关键词： Guidelines Medical services Medical diagnostic imaging Pipelines knowledge engineering Interactive systems Prototypes Quality management Costs Quality assurance

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