A Min Tjoa

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• Phone: +43 (1) 505 36 88
• Fax: +43 (1) 505 88 88

Bio

A Min Tjoa is since 1994 Full Professor for Software Technology at the Vienna University of Technology. He is currently also Chairman of the Austrian Competence Center for Security Research (“Secure Business Austria”).

From 1985 to 1994 he worked as Full Professor at the Institute of Statistics and Computer Science of the University of Vienna where he was the Head of this institute from 1985 to 1987. He was Visiting Professor at the Universities of Zurich, Kyushu and Wroclaw (Poland) and at the Technical Universities of Prague and Lausanne (Switzerland). He acted as the President of the Austrian Computer Society from 1999 to 2003. He is member of the IFIP Technical Committee for Information Systems.

Since 2000 A Min is Vice-Chairman of the DEXA-Association (Database and Expert Systems Applications). Since 2006 he is Vice-Chairman of the IFIP Working Group 8.9 (Enterprise Information Systems). He has been elected for Vice-President of the Infoterm (International Information Center for Terminology) for the term 2010-2012.

Publications

• A Min Tjoa and Stefan Fenz and Marcus Hudec, "Ontology-based Generation of Bayesian Networks," in International Conference on Complex, Intelligent and Software Intensive Systems, 2009. CISIS ’09., 2009, pp. 712-717. BibTeX | PDF
  @INPROCEEDINGS{Fenz_OntologybasedGenerationof_2009,
  Author = {{A Min} Tjoa and Stefan Fenz and Marcus Hudec},
  title = {Ontology-based Generation of {Bayesian} Networks},
  booktitle = {International Conference on Complex, Intelligent and Software Intensive Systems, 2009. CISIS '09.},
  year = {2009},
  month = {1},
  abstract = {Bayesian networks are indispensable for determining the probability of events which are influenced by various components. Bayesian probabilities encode degrees of belief about certain events and a dynamic knowledge body is used to strengthen, update, or weaken these assumptions. The creation of Bayesian networks requires at least three challenging tasks: (i) the determination of relevant influence factors, (ii) the determination of relationships between the identified influence factors, and (iii) the calculation of the conditional probability tables for each node in the Bayesian network. Based on existing domain ontologies, we propose a method for the ontology-based generation of Bayesian networks. The ontology is used to provide the necessary knowledge about relevant influence factors, their relationships, their weights, and the scale which represents potential states of the identified influence factors. The developed method enables, based on existing ontologies, the semi-automatic generation and alternation of Bayesian networks.},
  pdf = {2009 - Fenz - Ontology-based Generation of Bayesian Networks.pdf},
  pages = {712-717},
  publisher = {IEEE Computer Society},
  }
• A Min Tjoa and Amin Anjomshoaa and Mansoor Ahmed, "Context-Based Privacy Management of Personal Information Using Semantic Desktop: SemanticLIFE Case Study," Proceedings of the 10th International Conference on Informationb Integration and Web-based Application & Services, pp. 214-221, 2008. BibTeX
  @ARTICLE{TUW-168902,
  Author = {{A Min} Tjoa and Amin Anjomshoaa and Mansoor Ahmed},
  title = {Context-Based Privacy Management of Personal Information Using Semantic Desktop: SemanticLIFE Case Study},
  journal = {Proceedings of the 10th International Conference on Informationb Integration and Web-based Application {\&} Services},
  year = {2008},
  month = {1},
  pages = {214--221},
  publisher = {Oesterreichische Computer Geselschaft},
  note = {Vortrag: iiWAS 2008, Linz; 2008-11-24 -- 2008-11-26},
  }
• A Min Tjoa and Stefan Fenz, "Ontology- and Bayesian-based Threat Probability Determination," in Proceedings of the Junior Scientist Conference 2008, 2008, pp. 69-70. BibTeX
  @INPROCEEDINGS{Fenz_OntologyandBayesianbased_2008a,
  Author = {{A Min} Tjoa and Stefan Fenz},
  title = {Ontology- and Bayesian-based Threat Probability Determination},
  booktitle = {Proceedings of the Junior Scientist Conference 2008},
  year = {2008},
  month = {11},
  abstract = {Information security risk management is crucial for ensuring long-term business success and thus numerous approaches to implementing an adequate information security risk management strategy have been proposed. The subjective threat probability determination is one of the main reasons for an inadequate information security strategy endangering the organization in performing its mission. To address the problem this research project proposes an ontology- and Bayesian-based approach for determining asset-specific and comprehensible threat probabilities. The elaborated concepts enable risk managers to comprehensibly quantify the current security status of their organization.},
  pages = {69-70},
  publisher = {Vienna University of Technology},
  }
• A Min Tjoa and Stefan Fenz and Edgar R. Weippl and Andreas Ekelhart, "Security Issues for the Use of Semantic Web in e-Commerce," in Business Information Systems, 10th International Conference on Business Information Systems, BIS 2007, 2007, pp. 1-13. BibTeX | PDF
  @INPROCEEDINGS{Ekelhart_SecurityIssuesUse_2007,
  Author = {{A Min} Tjoa and Stefan Fenz and {Edgar R.} Weippl and Andreas Ekelhart},
  title = {Security Issues for the Use of Semantic Web in e-Commerce},
  booktitle = {Business Information Systems, 10th International Conference on Business Information Systems, BIS 2007},
  year = {2007},
  month = {4},
  pdf = {2007 - Ekelhart - Security Issues for the Use of Semantic Web in e-Commerce.pdf},
  number = {978-3-540-},
  pages = {1-13},
  publisher = {Springer Berlin Heidelberg},
  }
• A Min Tjoa and Stefan Fenz and Edgar R. Weippl and Andreas Ekelhart and Witold Abramowicz and Dominik Zyskowski and Monika Kaczmarek, "Security aspects in Semantic Web Services Filtering," in Proceedings of the 9th @WAS International Conference on Information Integration and Web-based Applications \& Services (iiWAS2007), 2007, pp. 21-31. BibTeX | PDF
  @INPROCEEDINGS{Abramowicz_Securityaspectsin_2007,
  Author = {{A Min} Tjoa and Stefan Fenz and {Edgar R.} Weippl and Andreas Ekelhart and Witold Abramowicz and Dominik Zyskowski and Monika Kaczmarek},
  title = {Security aspects in Semantic Web Services Filtering},
  booktitle = {Proceedings of the 9th @WAS International Conference on Information Integration and Web-based Applications \& Services (iiWAS2007)},
  year = {2007},
  month = {1},
  abstract = {Security and trust aspects, perceived as difficult to quantify, have been neglected in various service interactions. However, factors related to security and trust are in fact crucial in the overall value of service quality. A security ontology that enables a quantification of risks related to the usage of Semantic Web services in enterprise information systems was created to meet users' requirements and enhance Semantic Web services with machine processable security information. This article presents how this security ontology can be integrated into the Web service description and how it enhances the process of Web services filtering.},
  pdf = {2007 - Abramowicz - Security Aspects in Semantic Web Services Filtering.pdf},
  volume = {229},
  pages = {21-31},
  publisher = {Austrian Computer Society},
  }
• A Min Tjoa and Stefan Fenz and Edgar R. Weippl and Markus Klemen and Andreas Ekelhart, "The Semantic Desktop: A Semantic Personal Information Management System based on RDF and Topic Maps," in Proceedings of the ODBIS Workshop, 31st International Conference on Very Large Data Bases (VLDB) 2005, 2005, pp. 135-151. BibTeX | PDF
  @INPROCEEDINGS{Weippl_SemanticDesktopSemantic_2005,
  Author = {{A Min} Tjoa and Stefan Fenz and {Edgar R.} Weippl and Markus Klemen and Andreas Ekelhart},
  sbahotlist = {true},
  title = {The Semantic Desktop: A Semantic Personal Information Management System based on RDF and Topic Maps},
  booktitle = {Proceedings of the ODBIS Workshop, 31st International Conference on Very Large Data Bases (VLDB) 2005},
  year = {2005},
  month = {10},
  pdf = {2005 - Weippl - The Semantic Desktop.pdf},
  number = {4623},
  pages = {135-151},
  }

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