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Faculty : School of Information, Computer, and Communication Technology  (ICT)
Name : Dr. Ekawit Nantajeewarawat (Associate Professor)
Position : Assistant Director for General Administration, Bangkadi Campus
E - Mail :
Phone Rangsit :
Phone Bangkadi : +66-2-501-3505~20
Phone Extension : 5005/4102
  • B.Eng. in Computer Engineering, Chulalongkorn University, Thailand
  • M.Eng. in Computer Science, Asian Institute of Technology, Thailand
  • D.Eng. in Computer Science, Asian Institute of Technology, Thailand
Academic Awards
  • Very Good Research Award 2008, Thammasat University
  • 2001 Best Teaching Award, SIIT
  • Outstanding Dissertation Award 1999, National Research Council of Thailand (NRCT)
  • 1997 Best Teaching Award, SIIT
Research Areas
    Knowledge representation, Computational logics, Formal ontologies, Semantic Web, Information Extraction, Object-oriented system analysis and design.
Research Interests
    Semantic Web

    The basic idea of the Semantic Web is to describe the meaning of Web data in a way suitable for automatic reasoning. Expectedly, the Semantic Web technology will bring about large-scale heterogeneous Web knowledge bases with a qualitatively new level of service. The concept of ontology (domain theory) will play a key role as a formal, explicit specification of shared conceptualizations that describe the semantics of data on the Web. Formal ontology languages as well as meta-level representation of Web resources are investigated. The possibility of developing automated reasoning systems for Semantic Web is explored from both theoretical and practical viewpoints, e.g., a hybrid approach with a strict separation between ontology predicates and rule predicates and a homogeneous approach embedding rules and ontologies in a logical language. Realization of the Semantic Web vision demands further research works on several other knowledge-representation-related issues.

    Information Extraction

    Due to language-structure differences, when an information extraction (IE) framework that works well in one language is applied in a different language the framework often needs modification and supplementary components are often necessary. By incorporation of ontology-based semantic annotations and appropriate extraction filtering techniques, it is expected that IE based on patterns of triggering class tags and triggering plain words can be realized for Thai documents. We aim to develop a system for extracting semantic information from Thai text and representing extractions in a form of machine-processable frames. Extracted frames along with domain ontologies constitute a knowledge base from which logic-based reasoning engines can deduce several kinds of implicit information and relations. Application of this framework includes extraction of semantic frames from free-text abstracts of technical articles, which enables semantic document indexing and precise information retrieval based on semantic contents.

    Reasoning with UML Diagrams

    The Unified Modeling Language (UML) is a graphical language, adopted as a standard by the Object Management Group (OMG), for visualizing, specifying, constructing, and documenting the artifacts of a software-intensive system. As reported by recent works on the formal semantics of UML, there exist inherent interrelationships between components of a UML model. Such interrelationships constitute part of general knowledge about the domain of UML, which may be used for, e.g., deriving implicit properties and verifying the consistency of the model. A framework for knowledge representation and reasoning in the domain of UML is proposed, in which a UML model is represented as textual XML data, and the general knowledge about the UML domain as an XML declarative description. Development of an inference engine for automatic refinement of the encoded UML diagrams and derivation of implicit model properties is underway.

    Equivalent-Transformation Computation Model

    In declarative paradigms, a declarative description plays the role of a precise specification, and, at the same time, operates as a program. A number of works on amalgamation and generalization of declarative languages have been proposed. Most of them have been driven mainly by computation-oriented requirements, e.g., enhancement of operational semantics and integration of computation models; other important related concepts such as program synthesis and program transformation are investigated only afterwards and not inherent in their designs. By contrast, the equivalent transformation (ET) paradigm takes a program-synthesis-oriented approach, i.e., effective generation of efficient and correct programs from specifications is its underlying design motivation. Investigation of the ET computation model is in progress from both theoretical and application viewpoints .

Work Experiences
  • 1997-Present: SIIT
  • Present: Assistant Director for General Administration, Bangkadi Campus, SIIT
  • 2005-2006: Curriculum Coordinator, Computer Science Program, SIIT
  • 2002/5-2003/11: Head, School of Information and Management Technology, SIIT
  • 2000/7-2003/11: Chairperson, Information Technology Program, SIIT
  • 1989-1994: Teaching/Research Assistant, Computer Science Department, Asian Institute of Technology
  • 1987-1989: System Analyst, Siam Cement Company
List of Publications
  1. Nuttapong Sanglerdsinlapachai; Anon Plangprasopchok; and Ekawit Nantajeewarawat (2014). Exploiting rhetorical structures to improve feature-based sentiment analysis. In Proceedings of the 18th International Computer Science and Engineering Conference (ICSEC 2014) [CD-ROM], 30 July - 1 August 2014, Khon Kaen, Thailand, pp. 46-51.
  2. Tanatorn Tanantong; Ekawit Nantajeewarawat; and Surapa Thiemjarus (2014). False alarm reduction in continuous cardiac monitoring using 3D acceleration signals. In Proceedings of the 18th International Computer Science and Engineering Conference (ICSEC 2014) [CD-ROM], 30 July - 1 August 2014, Khon Kaen, Thailand, pp. 264-269.
  3. Nuttapon Sanyawong and Ekawit Nantajeewarawat (2014). Design pattern recommendation based-on a pattern usage hierarchy. In Proceedings of the 18th International Computer Science and Engineering Conference (ICSEC 2014) [CD-ROM], 30 July - 1 August 2014, Khon Kaen, Thailand, pp. 428-433.
  4. Natthapon Pannurat; Surapa Thiemjarus; and Ekawit Nantajeewarawat (2014). Automatic fall monitoring: a review, Sensors, Vol. 14, No. 7 (July 2014), pp. 12900-12936.
  5. Tanatorn Tanantong; Ekawit Nanthajeewarawat; and Surapa Thiemjarus (2014). Toward continuous ambulatory monitoring using a wearable and wireless ECG- recording system: a study on the effects of signal quality on arrhythmia detection, Bio-Medical Materials and Engineering, Vol. 24, No. 1, pp. 391-404.
  6. Akama, Kiyoshi and Ekawit Nantajeewarawat (2013). Solving query-answering problems using all-solution satisfiability solvers: algorithm and correctness. In Proceedings of the 3rd World Congress on Information and Communication technologies (WICT 2013). 15-18 December 2013, Hanoi, Vietnam, pp. 79-84.
  7. Akama, Kiyoshi and Ekawit Nantajeewarawat (2013). An ET-based low-level solution for query-answering problems, Lecture Notes in Computer Science: Multi-disciplinary Trends in Artificial Intelligence: Proceedings of the 7th Multi-Disciplinary International Workshop on Artificial Intelligence (MIWAI 2013), 9-11 December 2013, Krabi, Thailand, Vol. 8271, pp. 1-12.
  8. Shakya, Binita and Ekawit Nantajeewarawat (2013). A design pattern knowledge base and its application to sequence diagram design. In Proceedings of 2013 International Computer Science and Engineering Conference (ICSEC 2013), 4-6 September 2013, Bangkok, Thailand, pp. 179-184.
  9. Akama, Kiyoshi; Ekawit Nantajeewarawat; and Hidekatsu Koike (2013). Solving query-answering problems for the semantic web using equivalent transformation, Lecture Notes on Software Engineering: Proceedings of the 2013 2nd International Conference on Software and Computer Applications (ICSCA 2013), 1-2 June 2013, Paris, France, Vol. 1, No. 3, August 2013, pp. 249-253.
  10. Akama, Kiyoshi and Ekawit Nantajeewarawat (2013). Embedding proof problems into query-answering problems and problem solving by equivalent transformation. In Proceedings of the 5th International Conference on Knowledge Engineering and Ontology Development (KEOD 2013), 19-22 September 2013, Algarve, Portugal, pp. 253-260.
  11. Akama, Kiyoshi and Ekawit Nantajeewarawat (2013). Correctness of solving query-answering problems using satisfiability solvers, Lecture Notes in Computer Science: Intelligent Information and Database Systems: Proceedings of the 5th Asian Conference on Intelligent Information and Database Systems (ACIIDS2013), Part I, 18-20 March 2013, Kuala Lumpur, Malaysia, Vol. 7802, 2013, pp. 404-413.
  12. Akama, Kiyoshi and Ekawit Nantajeewarawat (2013). Elimination of function variables for solving query-answering problems. In Proceedings of 2013 5th International Conference on Computer Research and Development (ICCRD 2013), 23-24 February 2013, Ho Chi Minh City, Vietnam, pp. 201-208.
  13. Pasinee Apisakmontri; Ekawit Nantajeewarawat; Marut Buranarach; and Mitsuru Ikeda (2013). Towards the use of upper ontologies for refugee emergencies in disaster management. In Proceedings of the Second Asian Conference on Information Systems (ACIS 2013) [CD-ROM], 31 October 2 November 2013, Phuket, Thailand, pp. 153-160.
  14. Akama, Kiyoshi and Ekawit Nanthajeewarawat (2013). Unfolding-based simplification of query-answering problems in an extended clause space, International Journal of Innovative Computing, Information and Control, Vol. 9, No. 9, September 2013, pp. 3515-3526.
  15. Pitchakan Theekakul; Surapa Thiemjarus; and Ekawit Nantajeewarawat (2013). A hybrid framework for real-time continuous monitoring with body sensor networks, International Journal of Innovative Computing, Information and Control, Vol. 9, No. 6, June 2013, pp, 2377-2392.
  16. Shakya, Binita and Ekawit Nantajeewarawat (2013). Towards generation of sequence diagrams from operation contracts and design patterns. In Proceedings of the 2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON 2013) [CD-ROM], 15-17 May 2013, Krabi, Thailand, 5 p.
  17. Akama, Kiyoshi and Ekawit Nantajeewarawat (2012). A Delayed splitting bottom-up procedure for model generation, Lecture Notes in Computer Science: AI 2012: Advances in Artificial Intelligence: Proceedings of the 25th International Australasian Joint Conference, 4-7 December 2012, Sydney, Australia, Vol. 7691, 2012, pp. 481-492.
  18. Akama, Kiyoshi and Ekawit Nantajeewarawat (2012). An extension of first-order logic and meaning-preserving skolemization. In Proceedings of the 3rd Annual International Conference on Advanced Topic in Artificial Intelligence (ATAI 2012), 22-23 October 2012, Singapore, 6 p.
  19. Akama, Kiyoshi and Ekawit Nantajeewarawat (2012). Proving theorems based on equivalent transformation using resolution and factoring. In Proceedings of the 2nd World Congress on Information and Communication Technologies (WICT 2012), 30 October 2 November 2012, Trivandrum, India, pp. 7-12.
  20. Akama, Kiyoshi and Ekawit Nantajeewarawat (2012). Conjunction-based clauses for equivalent transformation of query-answering problems, International Journal of Future Computer and Communication: Proceedings of the 2012 International Conference on Telecom Technology and Applications (ICTTA 2012), 26-27 May 2012, Bali, Indonesia, Vol. 1, No. 1, June 2012, pp. 5-8.
  21. Nichnan Kittiphattanabawon; Thanaruk Theeramunkong; and Ekawit Nantajeewarawat (2012). Region-based ranking in association analysis for news relation discovery. In Proceedings of the 2012 Seventh International Conference on Knowledge, Information and Creativity Support Systems (KICSS 2012) [CD-ROM], 8-10 November 2012, Melbourne, Australia, pp. 187-194.
  22. Thawatchai Suwanapong; Thanaruk Theeramunkong; and Ekawit Nanthajeewarawat (2012). A fuzzy-relation approach for name-alias identification in Thai news articles. In Proceedings of The First ASIAN Conference on Information Systems (ACIS 2012) [CD-ROM], 6-8 December 2012, Siem Reap, Cambodia, pp. 352-357.

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