








Faculty : 
School of Information, Computer, and Communication Technology (ICT) 
Name : 
Dr. Nirattaya Khamsemanan (Associate Professor) 
Position : 
Associate Professor 
E  Mail : 
nirattaya@siit.tu.ac.th 
Phone Rangsit : 
+6629869009, +6629869101, +6625643226 
Phone Bangkadi : 

Phone Extension : 
1808 






 B.A. in Mathematics (cum laude), Cornell University, USA, May 2001
 M.A. in Mathematics, University of California, Los Angeles (UCLA), USA, December 2002
 Ph.D. in Mathematics, University of California, Los Angeles (UCLA), USA, June 2006




 2009 Best Teaching Award, Sirindhorn International Institute of Technology.
 The Robert Sorgenfrey Distinguished Teaching Assistant Award 2005. Department of Mathematics. UCLA, CA.
 The Cranson W. and Edna B. Shelly Award for Excellence in Undergraduate Research in Astronomy 19992000, Cornell University, NY.
 Full DPST Scholarship, (Development and Promotion for Science and Technology) from the Royal Thai Government, 19962006.




Algebraic topology, Cryptography, Intelligent User Interface (IUI), and Machine learning 



Algebraic Topology is a branch of mathematics which uses tools from abstract algebra to study topological spaces. The basic goal is to find algebraic invariants that classify topological spaces up to homeomorphism. The word “Topology” comes from the Greek words “topos”, which means place, and “logos”, which means study. Topology is the study of the properties of spaces that are invariant (preserved) under deformations, twisting, and stretching. It is often said that a topologist is a person who cannot tell the difference between their doughnut and their coffee mug, since each can be continuously deformed to the other (each is a solid sphere with one handle).
Cryptography can be summarized at a high level as the theory and practice of controlling information. Simple examples of its applications can be found in many places in modern societyperhaps the most prominent is that of securing electronic commerce. Branches of cryptography touch many areas of mathematics and computer science, including algebra, number theory, combinatorics and complexity theory, to name a few.
Intelligent User Interface (IUI) is a study on the development of humanmachine 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 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.






 2008Present: SIIT.
 September 20062008: Assistant Professor in Residence, Department of Mathematics, University of Connecticut.
 June 2006August 2006: Lecturer, Department of Mathematics, UCLA.
 January 2006June 2006: Teaching Instructor, Department of Mathematics, UCLA.
 September 2005January 2006: Teaching Assistant Consultant, Department of Mathematics, UCLA.
 July 2004 August 2005: Teaching Assistant, Department of Mathematics, UCLA.
 January 2003June 2004: Teaching Assistant, Astronomy Department, UCLA.
 July 1999May 2001: Astronomy Research Assistant, Astronomy Department, Cornell University.




Selected Invited Talks
 Topological Theory of Fixed and Periodic Points TTFPP 2007, Bedlewo
Poland,July 2228, 2007.
 AMS Special Session on Fixed Point Theory, Dynamics, and Group Theory, Joint
Mathematics Meetings, New Orleans, Louisiana, January 58, 2007.
Publications
 A rulebased approach for improving kinect skeletal tracking system with an application on standard Muay Thai maneuvers (with Ketchart Kaewplee and Cholwich Nattee), 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), Kitakyushu, Japan, December 36 , 2014, 281285.
 Human identification using skeletal gait and silhouette data extracted by Microsoft Kinect (with Nitchan Jianwattanapaisarn, Athiwat Cheewakidakarn, and Cholwich Nattee), 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), Kitakyushu, Japan, December 36 , 2014, 410414.
 A fixed point theorem for smooth extension maps (with R. F. Brown, C. Lee,
and Sompong Dhompongsa), Fixed Point Theory and Applications, Vol. 2014, April
2014, Article No. 97, 6 p.
 Muay Thai posture classification using skeletal data from kinect and
knearest neighbors (with Ketchart Kaewplee and Cholwich Nattee), Proceedings of
the International Conference on Information and Communication Technology for
Embedded Systems (ICICTES2014) [CDROM], Ayutthaya, Thailand, January 2325,
2014, 6 p.
 View independent human identification by gait analysis using skeletal data
and dynamic time warping (with Athiwat Cheewakidakarn and Cholwich Nattee),
Proceedings of the International Conference on Information and Communication
Technology for Embedded Systems (ICICTES2014) [CDROM], Ayutthaya, Thailand,
January 2325, 2014, 6 p.
 Mathematical handwritten formula recognition (with Chaninthorn
Amornsawaddirak and Cholwich Nattee), Proceedings of the International
Conference on Information and Communication Technology for Embedded Systems
(ICICTES2014) [CDROM], Ayutthaya, Thailand, January 2325, 2014, 4 p.
 Human Identification by gait analysis using skeletal data and dynamic time
warping (with Athiwat Cheewakidakarn and Cholwich Nattee), Proceedings of the
14th International Symposium on Advanced Intelligent Systems (ISIS 2013)
[CDROM], Daejeon, Korea, November 1316, 2013, 13 p.
 CESMath: an intelligent webbased application for mathematical education
with freeanswer questions and personalization (with Cholwich Nattee and
Pornchai Inchai), Proceedings of 2013 International Symposium on Language,
Linguistics, Literature and Education (ISLLLE) [CDROM], Osaka, Japan, November
79, 2013, Paper No. ISLLLE202, 1728.
 TranslationRandomizable distributions via random walks (with William E.
Skeith III), Lecture Notes in Computer Science: Provable Security: Proceedings
of the 7th International Conference, ProvSec 2013, Melaka, Malaysia, October
2325, 2013, Vol. 2809, (2013), 249270.
 A study and analysis of users’ onehanded thumb typing behaviors on
smartphones (with Piyoros Tungthamthiti and Cholwich Nattee), Proceedings of the
International Conference on Information and Communication Technology for
Embedded Systems (ICICTES 2013) [CDROM], Samutsongkhram, Thailand, January
2426, 2013, 4953.
 Interior fixed points of unitspherepreserving Euclidean maps (with Robert
F. Brown; Catherine Lee; and Sompong Dhompongsa), Fixed Point Theory and
Applications, Vol. 2012, Article ID. 183 (2012) 8 p.
 Governing shifted characters of Thai input method for smartphones (with
Piyoros Tungthamthiti and Cholwich Nattee), Proceedings of the 6th International
Conference on Soft Computing and Intelligent Systems, and the 13th International
Symposium on Advanced Intelligent Systems (SCISISIS 2012) [CDROM], Kobe,
Japan, November 2024, 2012, 15841589.
 A preliminary report on applying density function for positive and unlabeled
learning on text categorization (with Cholwich Nattee and Masayuki Numao),
Proceedings of The First ASIAN Conference on Information Systems (ACIS 2012)
[CDROM] , Siem Reap, Cambodia, December 68, 2012, 384387.
 An acronymbased candidate generation technique for virtual keyboard on
smartphone: a preliminary report (with Cholwich Nattee), Proceedings of The
First ASIAN Conference on Information Systems (ACIS 2012) [CDROM] , Siem Reap,
Cambodia, December 68, 2012, 348351.
 Nielsen theory and some selected applications to differential and integral
equations; a brief survey, Journal of Nonlinear Analysis and Optimization, Vol.
2 (2011) No. 1, 1924.
 Insights regarding the usefulness of partial notes in mathematics courses
(with F. Cardetti and M. C. Orgnero), Journal of the Scholarship of Teaching and
Learning, Vol. 10 (2010) No. 1, 8092.
 Fixed points of maps of a nonaspherical wedge, (with S. Kim, R. F. Brown, A.
Ericksen, and K. Merrill), Fixed Point Theory and Applications, Vol. 2009,
Article ID 531037 (2009) 18 p.
 Estimating Nielsen number on wedge product spaces (with S. Kim), Fixed Point
Theory and Applications, Vol. 2007.
 An algorithm for calculating the mod H Reidemeister trace of some maps of
surfaces with boundary, Ph.D thesis UCLA, 2006.
 Twodistance preserving functions (with R. Connelly), Contributions in
Algebra and Geometry, Vol. 43 (2002) No. 2, 557564.









