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12th International Conference on Knowledge Management and Knowledge Technologies, i-KNOW 2012

作者： Kellner, Gudrun Grünauer, Johannes Vienna University of Technology Inst. of Software Technology and Interactive Systems Austria

ISBN: (纸本)9781450312424

Text mining on a lexical basis is quite well developed for the English language. In compounding languages, however, lexicalized words are often a combination of two or more semantic units. New words can be built easily by concatenating existing ones, without putting any white spaces in between. That poses a problem to existing search algorithms: Such compounds could be of high interest for a search request, but how can be examined whether a compound comprises a given lexeme? A string match can be considered as an indication, but does not prove semantic relation. The same problem is faced when using lexicon based approaches where signal words are defined as lexemes only and need to be identified in all forms of appearance, and hence also as component of a compound. This paper explores the characteristics of compounds and their constituent elements for German, and compares seven algorithms with regard to runtime and error rates. The results of this study are relevant to query analysis and term weighting approaches in information retrieval system design. © 2012 ACM.

关键词： Search engines

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A model-driven architecture approach using explicit stakeholder quality requirement models for building dependable information systems

A model-driven architecture approach using explicit stakehol...

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5th International Workshop on software Quality, WoSQ 2007

作者： Biffl, Stefan Mordinyi, Richard Schatten, Alexander Inst. of Software Technology and Interactive Systems Vienna University of Technology Space-Based Computing Group Inst. of Computer Languages Vienna University of Technology

ISBN: (纸本)0769529593

Decision makers in safety-critical domains rely on data from dependable information systems. Traditional time- and safety-critical information systems, such as traffic management systems, have been using proprietary point-to-point data links, which are very dependable, but also time-consuming and costly to change due to the need to manually adapt a multitude of deployed systems. In this paper we introduce a model-driven architecture (MDA) system approach that describes explicitly stakeholder quality requirements on dependable data links between systems for decision support and generates new system versions that implement these requirements. The MDA approach is expected to a) improve the quality (assurance) of system requirements;b) support more explicit feedback on the quality of intermediate models during systems development;and c) provide better auditing capabilities of the systems development process. Based on an industry case study we describe the MDA concept of the system, the development process, and how software quality can be measured and improved. © 2007 IEEE.

关键词： Decision making

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Ontology-supported quality assurance for component-based systems configuration

Ontology-supported quality assurance for component-based sys...

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30th International Conference on software Engineering, ICSE 2008 - 6th Workshop on software Quality, WoSQ'08

作者： Biffl, Stefan Moser, Thomas Mordinyi, Richard Wahyudin, Dindin Inst. of Software Technology and Interactive Systems Vienna University of Technology Complex Systems Engineering Lab. Vienna University of Technology Inst. of Computer Languages Vienna University of Technology

ISBN: (纸本)9781605580234

systems development needs to reconcile views from many roles, such as domain experts and engineers. A particular challenge is the multitude of models for requirements and quality, which can get time consuming and error prone to trace, change, and verify. In this paper we introduce an ontology-supported component-based systems engineering approach for the production automation domain that describes explicitly stakeholder quality requirements and traces design decisions to generate new system and software versions that implement these requirements. The ontology approach is expected to allow continuous modeling and extracting model views for all roles involved to a) improve the quality assurance of system requirements;b) support more explicit feedback on the quality of intermediate models during systems development;and c) provide better auditing capabilities of the systems development process. Based on an industry case study, we describe the ontology concept of the system, the development process, and how software quality can be measured and improved. Copyright 2008 ACM.

关键词： Ontology

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Facilitating knowledge maintenance of clinical guidelines and protocols

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Studies in Health technology and Informatics 2004年第PT 1期107卷 57-61页

作者： Votruba, Peter Miksch, Silvia Kosara, Robert Vienna University of Technology Inst. of Software Technology and Interactive Systems Favoritenstraße 9-11/188 A-1040 Vienna Austria VRVis Research Center for Virtual Reality and Visualization Vienna Austria

Clinical protocols and guidelines are widely used in the medical domain to improve disease management techniques. Different software systems are in development to support the design and the execution of such guidelines. The bottleneck in the guideline software developing process is the transformation of the textbased clinical guidelines into a formal representation, which can be used by the execution software. This paper introduces a method and a tool that was designed to provide a solution for that bottleneck The so-called Guideline Markup Tool (GMT) facilitates the translation of guidelines into a formal representation written in XML. This tool enables the protocol designer to create links between the original guideline and its formal representation and ease the editing of guidelines applying design patterns in the form of macros. The usefulness of our approach is illustrated using GMT to edit Asbru protocols. We performed a usability study with eight participants to examine the usefulness of the GMT and of the Asbru macros, which showed that the proposed approach is very appropriate to author and maintain clinical guidelines. © 2004 IMIA. All rights reserved.

关键词： Medical informatics

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software Quality. The Future of systems- and software Development 1

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丛书名： Lecture Notes in Business Information Processing

1000年

作者： Dietmar Winkler Stefan Biffl Johannes Bergsmann

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I-know my users: User-centric profiling based on the perceptual preference questionnaire (PPQ) 12

I-know my users: User-centric profiling based on the percept...

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12th International Conference on Knowledge Management and Knowledge Technologies, i-KNOW 2012

作者： Kellner, Gudrun Berthold, Marcel Vienna University of Technology Inst. of Software Technology and Interactive Systems Austria Human Reactions Zarastraße 2/A I-39100 Bozen Italy

ISBN: (纸本)9781450312424

A substantial proportion of user modeling research deals with detection, classification and use of as well as adaptation to the users' preferences. In this paper, we develop a questionnaire to assess aspects of perceptual preferences in regard to information processing, knowledge gain and learning, named Perceptual Preferences Questionnaire (PPQ). The PPQ is validated based on the results of an online survey with forum users (n=76). Given the perceptual preferences of a user, we explore first implications on how to present information to that specific user in order to ease understanding, which can be achieved by matching his/her perceptual preferences. Further research aims to combine the PPQ with implicit testing based on the users' textual utterances and the users' interests. © 2012 ACM.

关键词： Surveys

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An initial analytical exploration of retrievability 15

An initial analytical exploration of retrievability

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5th ACM SIGIR International Conference on the Theory of Information Retrieval, ICTIR 2015

作者： Lipani, Aldo Lupu, Mihai Aizawa, Akiko Hanbury, Allan National Institute of Informatics 2-1-2 Hitotsubashi Chiyoda-ku Tokyo Japan Inst. of Software Technology and Interactive Systems Vienna University of Technology Vienna Austria

ISBN: (纸本)9781450338332

We approach the problem of retrievability from an analytical perspective, starting with modeling conjunctive and disjunctive queries in a boolean model. We show that this represents an upper bound on retrievability for all other best match algorithms. We follow this with an observation of imbalance in the distribution of retrievability, using the Gini coefficient. Simulation-based experiments show the behavior of the Gini coefficient for retrievability under different types and lengths of queries, as well as different assumptions about the document length distribution in a collection. © 2015 ACM.

关键词： accessibility retrievability boolean model gini coefficient

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Verboseness fission for BM25 document length normalization 15

Verboseness fission for BM25 document length normalization

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5th ACM SIGIR International Conference on the Theory of Information Retrieval, ICTIR 2015

作者： Lipani, Aldo Lupu, Mihai Hanbury, Allan Aizawa, Akiko National Institute of Informatics 2-1-2 Hitotsubashi Chiyoda-ku Tokyo Japan Inst. of Software Technology and Interactive Systems Vienna University of Technology Vienna Austria

ISBN: (纸本)9781450338332

BM25 is probably the most well known term weighting model in Information Retrieval. It has, depending on the formula variant at hand, 2 or 3 parameters (k1, b, and k3). This paper addresses b-the document length normalization parameter. Based on the observation that the two cases previously discussed for length normalization (multi-topicality and verboseness) are actually three: multi-topicality, verboseness with word repetition (repetitiveness) and verboseness with synonyms, we propose and test a new length normalization method that removes the need for a b parameter in BM25. Testing the new method on a set of purposefully varied test collections, we observe that we can obtain results statistically indistinguishable from the optimal results, therefore removing the need for ground-truth based optimization. © 2015 ACM.

关键词： Information retrieval

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The impact of fixed-cost pooling strategies on test collection bias 16

The impact of fixed-cost pooling strategies on test collecti...

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2016 ACM International Conference on the Theory of Information Retrieval, ICTIR 2016

作者： Lipani, Aldo Zuccon, Guido Lupu, Mihai Koopman, Bevan Hanbury, Allan Inst. of Software Technology and Interactive Systems Vienna University of Technology Vienna Austria Faculty of Science and Technology Queensland University of Technology Brisbane Australia Australian e-Health Research Centre CSIRO Brisbane Australia

ISBN: (纸本)9781450344975

In Information Retrieval, test collections are usually built using the pooling method. Many pooling strategies have been developed for the pooling method. Herein, we address the question of identifying the best pooling strategy when evaluating systems using precision-oriented measures in presence of budget constraints on the number of documents to be evaluated. As a quality measurement we use the bias introduced by the pooling strategy, measured both in terms of Mean Absolute Error of the scores and in terms of ranking errors. Based on experiments on 15 test collections, we conclude that, for precision-oriented measures, the best strategies are based on Rank-Biased Precision (RBP). These results can inform collection builders because they suggest that, under fixed assessment budget constraints, RBP-based sampling produces less biased pools than other alternatives.

关键词： Budget control

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Multilayer collection selection and search of topically organized patents

Multilayer collection selection and search of topically orga...

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Workshop on Integrating IR Technologies for Professional Search, IRPS 2013

作者： Salampasis, Michail Giachanou, Anastasia Paltoglou, Georgios Inst. of Software Technology and Interactive Systems Vienna Univ. of Technology Austria Dept. of Applied Informatics University of Macedonia Thessaloniki Greece School of Technology Univ. of Wolverhampton United Kingdom

We present a patent search system that explores three issues: (a) topical organization of patents based on their IPC, (b) collection selection of topically organised patent collections and (c) integration of collection selection tools to patent search systems. Patent documents produced worldwide have manually-assigned classification codes which in our work are used to cluster, distribute and index patents through hundreds or thousands of sub-collections. We propose a new collection selection method suitable for search systems having documents organized using hierarchical classification schemes such as IPC/CPC. The new method uses multiple evidence utilising, for each collection, the ranking of ancestors collections in higher level of the classification hierarchy. We tested our method on CLEF-IP 2011 and compared its performance to state-of-the-art collection selection algorithms. We also integrated this method as a component suggesting patent collections in the iPerFedPat patent search system. Copyright © by the paper's authors.

关键词： Safety devices

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