• B.Eng. in Computer Engineering, Chulalongkorn University, Thailand
• M.Eng. in Computer Science,Tokyo Institute of Technology, Japan
• D.Eng. in Computer Science,Tokyo Institute of Technology, Japan

• Young Researcher Award, Thammasat University, 2009
• Very Good Research Award, Thammasat University, 2008
• Japanese Government (Monbukagakusho) Scholarship, 1998-2004

Artificial intelligence, Machine learning, Knowledge discovery and data mining, Artificial intelligence applications in distance learning, and Pattern recognition.

Intelligent User Interface (IUI) is a study on the development of human-machine interfaces that work naturally to the users, as well as improve the efficiency and effectiveness of the interaction. The goal of IUI is basically fulfilled by applying various techniques from Artificial Intelligence, Machine Learning, and Statistics, such as knowledge representation and reasoning, user modeling, gesture recognition, natural language processing, etc.

Machine Learning is a field of study that focuses on automatically constructing models from a set of collected examples. The obtained model can be used to predict the properties of the data found in the future. For example, a credit card company may need a model to predict if a payment made through their credit card is a fraud or not. Manually constructing a model takes huge efforts and it may miss some fraudulent behaviors. Machine Learning helps reduce the required efforts, and wisely utilize a large amount of collected data.

Pattern Recognition aims to construct a model that represents patterns of interested objects. The model is typically built using supervised machine learning techniques. It is applied in wide areas of applications, for example, Optical Character Recognition (OCR) is a software component converting the scanned image of characters into text. Handwriting Recognition converts users’ handwritten strokes into a sequence of characters.

• 2005-Present: SIIT
• 2004-2005: Research Associate, Institute of Scientific and Industrial Research, Osaka University, Japan
• 2001-2003: Research Assistant, National Institute of Informatics, Japan

Journals

1. Romrawin Chumpu; Nirattaya Khamsemanan; Cholwich Nattee (2018). Influenza activity and province-level weather variations in Thailand, 2009 to 2014, using random forest time-series approach, Chiang Mai Journal of Science, Vol. 45, No. 5, September 2018, pp. 2509-2514.
2. Nirattaya Khamsemanan; Cholwich Nattee; Nitchan Jianwattanapaisarn (2018). Human identification from freestyle walks using posture-based gait feature, IEEE Transactions on Information Forensics and Security, Vol. 13, No. 1, January 2018, pp. 119-128.
3. Cholwich Nattee; Nirattaya Khamsemanan; Luckhana Lawtrakul; Pisanu Toochinda; and Supa Hannongbua (2017). A novel prediction approach for antimalarial activities of trimethoprim, pyrimethamine, and cycloguanil analogues using extremely randomized trees, Journal of Molecular Graphics and Modelling, Vol. 71, January 2017, pp. 13-27.
4. Krit Inthajak; Pisanu Toochinda; Nirattaya Khamsemanan; Cholwich Nattee; and Luckhana Lawtrakul (2017). A prediction approach for anti-HIV activity of HEPT compounds using random forest technique, Monatshefte für Chemie, Vol. 148, No. 10, October 2017, pp. 1697-1709.
5. Cholwich Nattee (2014). A survey on Thai input methods on smartphones, IEICE Transactions on Information and Systems, Vol. E97-D, No. 9, September 2014, pp. 2338-2345.
6. Thitikorn Boonyathada; Jaruek Chookittikul; Wajee Chookittikul; and Cholwich Nuttee (2013). Balanced scorecard quality information for the dentist development in Dental Health Division, Health Department, Bangkok Metropolitan Administration, Srinakharinwirot University (Journal of Science and Technology), Vol. 5, No. 9, January-June 2013, pp. 24-34. (In Thai)
7. Qu, Jian; Thanaruk Theeramunkong; Nguyen Le Ming; Akira Shimazu; Cholwich Nattee; and Pakinee Aimmanee (2012). A flexible rule-based approach to learn medical English-Chinese OOV term translations from the web, International Journal of Computer Processing of Languages, Vol. 24, No. 2, June 2012, pp. 207-236.

Conferences

1. Krit Inthajak; Nirattaya Khamsemanan; Cholwich Nattee; Pisanu Toochinda; and Luckhana Lawtrakul (2016). Quantiative structure-activity relationship analysis of 1-[(2-Hydroxyethoxy)methyl]-6-(phenylthio)thymine (HEPT) analogues with the use of random forest. In Proceedings of the 2016 Second Asian Conference on Defence Technology (ACDT 2016), 21-23 January 2016, Chiang Mai, Thailand, pp. 170-173.
2. Nattapol Kritsuthikul; Shinobu Hasegawa; Cholwich Nattee; and Thepchai Supnithi (2014). Assisting tools for selecting proper semantic meaning by disambiguation of the interference of the first language. In Workshop Proceedings of the 22nd International Conference on Computers in Education (ICCE 2014), 30 November - 4 December 2014, Nara, Japan, pp. 609-615.
3. Ketchart Kaewplee; Nirattaya Khamsemanan; and Cholwich Nattee (2014). A rule-based approach for improving kinect skeletal tracking system with an application on standard Muay Thai maneuvers. In Proceedings of 2014 Joint 7th International Conference on Soft Computing and Intelligent Systems (SCIS 2014) and 15th International Symposium on Advanced Intelligent Systems (ISIS 2014), 3-6 December 2014, Kitakyushu, Japan, pp. 281-285.
4. Nitchan Jianwattanapaisarn; Athiwat Cheewakidakarn; Nirattaya Khamsemanan; and Cholwich Nattee (2014). Human identification using skeletal gait and silhouette data extracted by Microsoft Kinect. In Proceedings of 2014 Joint 7th International Conference on Soft Computing and Intelligent Systems (SCIS 2014) and 15th International Symposium on Advanced Intelligent Systems (ISIS 2014), 3-6 December 2014, Kitakyushu, Japan, pp. 410-414.
5. Ketchart Kaewplee; Nirattaya Khamsemanan; and Cholwich Nattee (2014). Muay Thai posture classification using skeletal data from kinect and k-nearest neighbors. In Proceedings of the International Conference on Information and Communication Technology for Embedded Systems (ICICTES2014) [CD-ROM], 23-25 January 2014, Ayutthaya, Thailand, 6 p.
6. Athiwat Cheewakidakarn; Nirattaya Khamsemanan; and Cholwich Nattee (2014). View independent human identification by gait analysis using skeletal data and dynamic time warping. In Proceedings of the International Conference on Information and Communication Technology for Embedded Systems (ICICTES2014) [CD-ROM], 23-25 January 2014, Ayutthaya, Thailand, 6 p.
7. Chaninthorn Amornsawaddirak; Cholwich Nattee; and Nirattaya Khamsemanan (2014). Mathematical handwritten formula recognition. In Proceedings of the International Conference on Information and Communication Technology for Embedded Systems (ICICTES2014) [CD-ROM], 23-25 January 2014, Ayutthaya, Thailand, 4 p.
8. Athiwat Cheewakidakarn; Nirattaya Khamsemanan; and Cholwich Nattee (2013). Human Identification by gait analysis using skeletal data and dynamic time warping. In Proceedings of the 14th International Symposium on Advanced Intelligent Systems (ISIS 2013) [CD-ROM], 13-16 November 2013, Daejeon, Korea, 13 p.
9. Nirattaya Khamsemanan; Cholwich Nattee; and Pornchai Inchai (2013). CESMath: an intelligent web-based application for mathematical education with free-answer questions and personalization. In Proceedings of 2013 International Symposium on Language, Linguistics, Literature and Education (ISLLLE) [CD-ROM], 7-9 November 2013, Osaka, Japan, Paper No. ISLLLE-202, pp. 17-28.
10. Nattapol Kritsuthikul; Shinobu hasegawa; Cholwich Nattee; and Thepchai Supnithi (2013). A virtual environment for English as foreign language learning platform (veEFL): applied “single idea of concept” to improve writing skill of low English proficiency students. In Proceedings of the Second Asian Conference on Information Systems (ACIS 2013)[CD-ROM], 31 October – 2 November 2013, Phuket, Thailand, pp. 247-254.
11. Piyoros Tungthamthiti; Cholwich Nattee; and Nirattaya Khamsemanan (2013). A study and analysis of users’ one-handed thumb typing behaviors on smartphones. In Proceedings of the International Conference on Information and Communication Technology for Embedded Systems (ICICTES 2013) [CD-ROM], 24-26 January 2013, Samutsongkhram, Thailand, pp. 49-53.
12. Piyoros Tungthamthiti; Cholwich Nattee; and Nirattaya Khamsemanan (2012). Governing shifted characters of Thai input method for smartphones. In Proceedings of the 6th International Conference on Soft Computing and Intelligent Systems, and the 13th International Symposium on Advanced Intelligent Systems (SCIS-ISIS 2012) [CD-ROM], 20-24 November 2012, Kobe, Japan, pp. 1584-1589.
13. Cholwich Nattee; Nirattaya Khamsemanan; and Masayuki Numao (2012) A preliminary report on applying density function for positive and unlabeled learning on text categorization. In Proceedings of The First ASIAN Conference on Information Systems (ACIS 2012) [CD-ROM], 6-8 December 2012, Siem Reap, Cambodia, pp. 384-387.
14. Nirattaya Khamsemanan and Cholwich Nattee (2012). An acronym-based candidate generation technique for virtual keyboard on smartphone: a preliminary report. In Proceedings of The First ASIAN Conference on Information Systems (ACIS 2012) [CD-ROM], 6-8 December 2012, Siem Reap, Cambodia, pp. 348-351.
15. Thitiya Phanchaipetch and Cholwich Nattee (2012). An approach for improving Thai text entry on touch screen mobile devices based on adaptive bivariate normal distribution and probabilistic language model, Lecture Notes in Computer Science: Intelligent Information and Database Systems: Proceedings of the 4th Asian Conference (ACIIDS 2012I), 19-21 March 2012, Kaohsiung, Taiwan, pp. 187-196.
16. Eakasit Pacharawongsakda; Cholwich Nattee; and Thanaruk Theeramunkong (2012). Improving multi-label classification using semi-supervised learning and dimensionality reduction, Lecture Notes in Computer Science: Artificial Intelligence: Proceedings of the 12th Pacific Rim International Conference on Artificial Intelligence (PRICAI 2012) [CD-ROM], 3-7 September 2012, Kuching, Malaysia, Vol. 7458, 2012, pp. 423-434.
17. Pimolluck Jirakunkanok and Cholwich Nattee (2011). Baseline detection for on-line cursive Thai handwriting recognition based on PCA, Lecture Notes in Computer Science: Knowledge, Information, and Creativity Support Systems: Revised Selected Papers from 5th International Conference on Knowledge, Information and Creativity Support Systems (KICSS 2010), Chiang Mai, Thailand, 25-27 November 2010, LNCS 6746, 2011. pp. 56-67.