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Using pseudo feedback to improve cross-lingual ontology mapping

Using pseudo feedback to improve cross-lingual ontology mapp...

引用

Lecture Notes in Computer Science

作者： Fu, Bo Brennan, Rob O'Sullivan, Declan Knowledge and Data Engineering Group School of Computer Science and Statistics Trinity College Dublin Ireland

ISBN: (纸本)9783642210334

Translation techniques are often employed by cross-lingual ontology mapping (CLOM) approaches to turn a cross-lingual mapping problem into a monolingual mapping problem which can then be solved by state of the art monolingual ontology matching tools. However in the process of doing so, noisy translations can compromise the quality of the matches generated by the subsequent monolingual matching techniques. In this paper, a novel approach to improve the quality of cross-lingual ontology mapping is presented and evaluated. The proposed approach adopts the pseudo feedback technique that is similar to the well understood relevance feedback mechanism used in the field of information retrieval. It is shown through the evaluation that pseudo feedback can improve the matching quality in a CLOM scenario. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Quality control

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A web statistics based conflation approach to improve Arabic text retrieval

A web statistics based conflation approach to improve Arabic...

引用

2011 Federated Conference on Computer Science and Information Systems, FedCSIS 2011

作者： Ahmed, Farag Nürnberger, Andreas Data and Knowledge Engineering Group Faculty of Computer Science Otto-von-Guericke-University of Magdeburg Germany

ISBN: (纸本)9781457700415

We present a language independent approach for conflation that does not depend on predefined rules or prior knowledge of the target language. The proposed unsupervised method is based on an enhancement of the pure n-gram model that is used to group related words based on a revised string-similarity measure. In order to detect and eliminate terms that are created by this process, but that are most likely not relevant for the query ("noisy terms"), an approach based on mutual information scores computed based on web statistical cooccurrences data is proposed. Furthermore, an evaluation of this approach is presented. © 2011 Polish Info Processing Soc.

关键词： Information use

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Explicit federal relationship management to support semantic integration

Explicit federal relationship management to support semantic...

引用

12th IFIP/IEEE International Symposium on Integrated Network Management, IM 2011

作者： Brennan, Rob Feeney, Kevin Walsh, Brian Thomas, Hendrik O'Sullivan, Declan FAME and Knowledge and Data Engineering Group School of Computer Science and Statistics Trinity College Dublin Dublin Ireland

ISBN: (纸本)9781424492213

Integration of disparate information resources has long been a significant research topic. Semantic approaches can help by allowing expression of concepts divorced from syntax and allowing rich, structured meta-data to be published in a form that is amenable to machine processing, reasoning and inter-domain concept mapping. However the creation of mappings, especially in a dynamic federations of autonomous entities, is time-consuming and vulnerable to brittleness and high maintenance costs due to change at many levels in the system. In this paper we propose an approach to managing change and maximizing mapping reuse by building explicit models of the federal relationship context of mapping deployment. These descriptions enable automated support for mapping reuse suggestions and ease discovery of relevant mappings due to changes at the federation, peer domain, shared capability or local model levels. © 2011 IEEE.

关键词： Mapping

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Towards multilingual user models for Personalized multilingual Information Retrieval

Towards multilingual user models for Personalized multilingu...

引用

1st Workshop on Personalised Multilingual Hypertext Retrieval, PMHR 2011, Held in Conjunction with the ACM Hypertext 2011, HT2011

作者： Ghorab, M. Rami Zhou, Dong Ben, Steichen Wade, Vincent Centre for Next Generation Localisation Knowledge and Data Engineering Group School of Computer Science and Statistics Dublin 2 Ireland

ISBN: (纸本)9781450308977

The majority of studies in Personalized Information Retrieval (PIR) literature have focused on monolingual IR, and only relatively little work has been done concerning multilingual IR. In this paper we propose a novel method to represent user models in a multilingual fashion. We argue that such representation would be more suitable for Personalized Multilingual Information Retrieval (PMIR). Furthermore, we outline two algorithms for query adaptation based on user information from the multilingual user model. © 2011 ACM.

关键词： User profile

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Challenges for the multi-lingual, multi-dimensional personalised web

Challenges for the multi-lingual, multi-dimensional personal...

引用

1st Workshop on Personalised Multilingual Hypertext Retrieval, PMHR 2011, Held in Conjunction with the ACM Hypertext 2011, HT2011

作者： Wade, Vincent Centre for Next Generation Localisation Knowledge and Data Engineering Group School of Computer Science and Statistics Dublin 2 Ireland

ISBN: (纸本)9781450308977

The explosive growth of the Internet has seen it exceed over two billion users in 2010. However an analysis of the demography of this user base indicates an ever growing diversity. Currently only 38.8% of internet users originate from the countries such as Europe, America and Australia whereas 61.2% internet users come from the Africa, Asia and Middle East1. Moreover, these figures are changing even farther in favour of Africa, Asia and Middle East countries since their current internet penetration levels are relatively low e.g. the penetration of the internet in China/Asia is only at 21%, and Africa is only 10%. It is clear that the diversity of the user base of the web is growing rapidly. Moreover research is showing that each individual uses the WWW in different ways that suit their own personal needs, preferences. However, it is also clear that these differences extends far beyond just the appropriateness of content selection, and encompasses many dimensions e.g. tasks & activities, cultural preferences, language and social interaction etc. From a language diversity perspective, this growing diversity of internet users is increasingly apparent with English only accounting for 27% of all languages on the Internet in 2010. Other evidence of user diversity is demonstrated in social networking sites such as Facebook where in 2007 it supported 50M users in only one language (English) whilst by 2010 it had grown to 600M users and supported 77 different languages. By 2010 55% (approximately 13.75 Billion) tweets on Twitter were non-English. The expansion of the internet is not just in user number but has also resulted in vast quantities and great diversity of WWW accessible content where user generated content has for some time exceeded traditional web hosted content. In 2011, mobile access to the Internet and WWW has exceeded that accessed from desktop computers. Increasingly digital content on the internet is reaching users, not just through traditional web queries b

关键词： Social networking (online)

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Community assessment using evidence networks

Community assessment using evidence networks

引用

Lecture Notes in Computer Science

作者： Mitzlaff, Folke Atzmueller, Martin Benz, Dominik Hotho, Andreas Stumme, Gerd University of Kassel Knowledge and Data Engineering Group Wilhelmshöher Allee 73 34121 Kassel Germany University of Wuerzburg Data Mining and Information Retrieval Group Am Hubland 97074 Wuerzburg Germany

ISBN: (纸本)9783642235986

Community mining is a prominent approach for identifying (user) communities in social and ubiquitous contexts. While there are a variety of methods for community mining and detection, the effective evaluation and validation of the mined communities is usually non-trivial. Often there is no evaluation data at hand in order to validate the discovered groups. This paper proposes an approach for (relative) community assessment. We introduce a set of so-called evidence networks which are capturing typical interactions in social network applications. Thus, we are able to apply a rich set of implicit information for the evaluation of communities. The presented evaluation approach is based on the idea of reconstructing existing social structures for the assessment and evaluation of a given clustering. We analyze and compare the presented approach applying user data from the real-world social bookmarking application BibSonomy. The results indicate that the evidence networks reflect the relative rating of the explicit ones very well. © 2011 Springer-Verlag.

关键词： Artificial intelligence

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Privacy-aware spam detection in social bookmarking systems 11

Privacy-aware spam detection in social bookmarking systems

引用

11th International Conference on knowledge Management and knowledge Technologies, i-KNOW 2011

作者： Bullock, Beate Navarro Lerch, Hana Roßnagel, Alexander Hotho, Andreas Stumme, Gerd University of Kassel Knowledge and Data Engineering Group Kassel Germany University of Kassel Research Group for Constitutionally Compatible Technology Design Kassel Germany University of Würzburg Data Mining and Information Retrieval Group Würzburg Germany

ISBN: (纸本)9781450307321

With the increased popularity of Web 2.0 services in the last years data privacy has become a major concern for users. The more personal data users reveal, the more difficult it becomes to control its disclosure in the web. However, for Web 2.0 service providers, the data provided by users is a valuable source for offering effective, personalised data mining services. One major application is the detection of spam in social bookmarking systems: in order to prevent a decrease of content quality, providers need to distinguish spammers and exclude them from the system. They thereby experience a conflict of interests: on the one hand, they need to identify spammers based on the information they collect about users, on the other hand, they need to respect privacy concerns and process as few personal data as possible. It would therefore be of tremendous help for system developers and users to know which personal data are needed for spam detection and which can be ignored. In this paper we address these questions by presenting a data privacy aware feature engineering approach. It consists of the design of features for spam classification which are evaluated according to both, performance and privacy conditions. Experiments using data from the social bookmarking system BibSonomy show that both conditions must not exclude each other.

关键词： data privacy

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Supporting learner model exchange in educational web systems

Supporting learner model exchange in educational web systems

引用

作者： Walsh, Eddie O'Connor, Alexander Wade, Vincent Knowledge and Data Engineering Group School of Computer Science and Statistics Trinity College Dublin Dublin 2 Ireland

ISBN: (纸本)9789898425515

The heterogeneity of learner models in structure, syntax and semantics makes sharing them a significant challenge for existing educational web systems. Creating mappings between the different types of learner models is one technique that is used when attempting to overcome these issues. This paper presents an overview of research currently being conducted in the area of learner model exchange and defines a categorization, derived from existing educational web systems, of the different mapping types that are required for learner model mapping. Following this, a framework is presented that supports the creation and validation of these different mapping types and the exchange of learner information between multiple heterogeneous educational web systems.

关键词： Mapping

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Supporting vague query formulation by using visual filtering

Supporting vague query formulation by using visual filtering

引用

Symposium on Learning, knowledge, and Adaptivity 2011, LWA 2011

作者： Nitsche, Marcus Nurnberger, Andreas Institute for Technical and Business Information Systems Data and Knowledge Engineering Group Otto-von-Guericke-University Magdeburg D-39116 Magdeburg Germany

We propose a radial user interface which supports phrasing and interactive visual refinement of vague queries in order to search and explore large document sets. The core idea is to provide an integrated view of queries and related results, where both queries and results can be interactively manipulated and changes are immediately visualized. Furthermore, the relevance of queries and results can be gradually changed and thus it is possible for a user to explore effects even of slight query changes. Besides the interface itself, we present results of a first user study. The proposed interface can be applied in many interactive text retrieval scenarios. However, it can also be used to support decision making processes where an exploration and interpretation of complex data sets is required.

关键词： User interfaces

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A trust model for capability delegation in federated policy systems

A trust model for capability delegation in federated policy ...

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6th International Conference on Risks and Security of Internet and Systems, CRiSIS 2011

作者： Feeney, Kevin Foley, Simon N. Brennan, Rob Intelligent Systems Lab Knowledge and Data Engineering Group Trinity College Dublin Ireland FAME Department of Computer Science University College Cork Ireland

ISBN: (纸本)9781457718915

Federated policy systems are required to support the emergent complexity and organizational heterogeneity of modern Internet service delivery. This paper presents a distributed policy management approach which utilizes a flexible, tree-based capability authority model to partition and delegate federated capabilities or services. A trust management model and a delegation logic is defined which supports secure decentralized policy reasoning and addresses performance overheads due to distributed rule evaluation, threats from malformed or malicious federated principals and allows flexibility with respect to delegation chain reduction or capability authority re-partitioning. The system is evaluated through a security analysis and a prototype implementation of a federated policy engineering framework based on this logic is described. This framework is based on public key certificates and an extension to the Keynote Trust Management language. It provides practical management services such as key discovery and certificate revocation in addition to the core capability delegation function. © 2011 IEEE.

关键词： Computer circuits

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