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- 1. Rohana Rajapakse, Ph.D. 267 North Road West, Plymouth UK, PL1 5DH Telephone (Home): +44-1752-603095 E-mail: rrajapakse@plymouth.ac.uk EDUCATION PhD University of Plymouth, UK 2004 Computer Science MSc University of Plymouth, UK 1998 Computational Intelligence MSc University of Colombo, Sri Lanka 1995 Computer Science BSc University of Colombo, Sri Lanka 1986 Mathematics CORE SKILLS ? Information processing, Management and Computational Linguistics: ? Text Processing/Retrieval techniques: text extraction, representation, retrieval and query reformulation. ? Document categorisation for Knowledge Management (Meta-tagging). ? Adaptive information retrieval using Neural Networks for concept representation and concept matching. ? Programming, Tools and Environments: ? Solid, long-term kills in Java. ? MatLab and CortexPro neural network simulator. ? Eclipse IDE, JUnit unit testing, Subversion (SVN), Tortoise for SVN, Maven ? Computational Intelligence: ? Neural nets, reinforcement learning, genetic algorithms and fuzzy set theory. Experienced in using a number of different neural network architectures including MLP, RBF, Elman nets and Bidirectional Associative Memories (BAMs). ? Good experience of hands-on implementation and experimentation with such techniques for important real-world problems. ? Interested in biologically inspired machine vision (object identification, spatial relationships etc.). ? Excellent engineering and mathematical problem solving abilities. ? Substantial knowledgeable and experienced of conducting research (independently and team project-based), reporting and publishing results. SPECIALISED TRAINING Mar/2007 (one week): J2EE¨C JB International Ltd., London. Nov/2006 (one week): Business Leadership. Jan/2006 (4 days) : Advanced Java programming ¨C JB International Ltd., London.
- 2. Nov/2005 (one week) : Peoples Skills/Management ¨C Insight People Development Ltd, UK Oct/2005 (one week) : Managing for Results/ Project Management - Insight People Development Ltd, UK Feb/2002-April/2002 : Teaching techniques course ¨C University of Plymouth, UK Jan/1998-Mar/1998 : Case Tools Based Object Oriented Systems Design- Tokyo, Japan Nov/1995-Mar/1996 : Personal Computer Network Systems Designer - Okinawa, Japan PRESENT EMPLOYMENT Aug/2005 ¨C To date Senior Developer, GOSS Interactive Ltd, IITC, Tamar Science Park, 1 Davy Road, Derriford, Plymouth, UK, PL6 8BX The aim of the project is to develop automatic meta-tagging techniques to extract appropriate subject topics from taxonomies. Development of techniques and models using open source software including ¡°Kea¡± keyphrase extraction tools and Lucene search engine. Also implemented novel learning mechanisms for user preference adaptation. The techniques developed are integrated into a content management software. One publication has been made and three are in preperations. PREVIOUS EMPLOYMENT Dec/2003-Aug/2005 Postdoctoral Research Fellow, School of Computing Communications and Electronics, University of Plymouth, UK, PL4 8AA Responsible for developing a connectionist model for grounding spatial prepositions and quantifiers in English language. Created a neural network model that can reproduce the acceptability ratings given by human subjects for a set of visual stimuli. The model includes a vision processing module with Gaussian receptive fields to extract salient features of input stimuli to create vector representations. These are used to train the neural network module(s) to produce the acceptability ratings. Mar/1991-Nov/1999 Systems Analyst/Programmer, Department of Statistics and Computer Science, University of Colombo, Sri Lanka. A number of responsibilities involved in this employment. In addition to systems analysis and development, other responsibilities included teaching and tutoring undergraduate and postgraduate computer science modules, administration of computer systems, networks and labs, and consultancy work regarding the design and development of departmental software. Furthermore, course material were developed for few course modules and was the line manager of junior demonstrators and instructors.
- 3. TEACHING Undergraduate Level ? Neural Computing ¡¡¡¡¡¡¡... ¡.Undergraduate- Level3 and MSc ? C Programming¡¡¡¡¡¡¡¡¡. ¡.Undergraduate teaching ¨C Level3 ? Parallel Processing¡¡¡¡¡¡¡¡ ¡.Undergraduate teaching ¨C Level3 ? Fuzzy Logic & Fuzzy Systems¡¡¡. ¡.Undergraduate Teaching ¨C Level3 ? Computer literacy courses on¡¡¡... ¡.Undergraduate teaching and lab Application Packages demonstrations for non computing degrees ? Computing for Lawyers...................... ¡.Undergraduate teaching ¨C level1 ? Information Retrieval........................... ¡.Undergraduate seminars ¨C Level2 ? Introduction to Information.................. ¡.Undergraduate teaching and lab Technology I (Access, Excel & Word) demonstration ¨C Level1 COURSE DEVELOPMENT ? Designed and developed ? a course on ¡°Neural Networks¡± for undergraduates and ? a course for postgraduates. ? Designed and developed ? a course on Fuzzy Systems for undergraduates. ? Designed and developed ? a course on C/C++ programming for undergraduates. ? Designed and developed a number of computer literacy courses on Microsoft office suit. ACADEMIC HONORS AND AWARDS ? Distinction pass- MSc in Computational Intelligence at Univ. of Plymouth, UK. ? Fist Class pass ¨C BSc in Mathematics at Univ. of Colombo, Sri Lanka. ? World Bank Scholarship for the MSc at Univ. of Plymouth, UK. ? Studentship/Bursary for the PhD from the Univ. of Plymouth, UK. ? Excellent Achievement Award - OO Designer course, CICC, Japan. PUBLICATIONS Journal Publications / Book Chapters: ? Rajapakse R.K., Johnson, C. and Gant, N. (under review). ¡°Feature learning for adaptive document categorisation¡±. International Journal of Human-Computer Studies. ? Rajapakse R.K., Mushens, B. and Gant, N. (under review). ¡°Dynamic weight step computation for user-oriented adaptive concept learning¡±. Journal of Information Processing and Management. ? Rajapakse R.K., Mushens, B. and Phippen, A. (under review). ¡°Automated subject categorisation with controlled vocabularies¡±, Journal of Information Processing & Management. ? Rajapakse R.K., Mushens, B. and Johnson, C. (2007), ¡°The use of keyphrases for selecting metadata from taxonomies¡±, Book chapter in ¡°Creating Collaborative Advantage Through Knowledge and Innovation¡±, Series on Innovation and Knowledge Management, Vol. 5, edited by Suliman Hawamdeh (Oklahoma University, USA),
- 4. World Scientific Publishing Company Ltd. Singapore. ? Rajapakse R.K. and Denham M. (2006), ¡°Text Retrieval with more Realistic Concept Matching and Reinforcement Learning", Journal of Information Processing & Management, Vol.42. pp1260-1275. ? Rajapakse R.K, Denham M. (2005), ¡°Fast Access to Concepts in Concept Lattices via Bidirectional Associative Memories¡±, Journal of Neural Computation, Vol.17(10). ? Coventry, K.R., Cangelosi, A., Rajapakse, R., Bacon, A., Newstead, S. Joyce, D., and Richards, L.V.(2005), ¡°Spatial prepositions and vague quantifiers: Implementing the functional geometric framework. In C. Freksa, B. Nebel, M. Knuff & B. Krieg-Bruckner (Eds.), Spatial Cognition, Volume IV. Reason Action and Interaction, pp 98-110. Lecture notes in Artificial Intelligence, Springer Verlag Book chapter). Conference / Workshop Proceedings: ? Rajapakse, R.K. (2007) ¡°Structuring the Unstructured: Metadata for Knowledge Management¡±. In proceedings of the South West Regional Seminar, 14th November 2007, University of Plymouth. ? Rajapakse, R.K., Cangelosi, A., Coventry, K.R., Newstead, S. and Bacon, A., (2005) "Connectionist Modeling of Linguistic Quantifiers", International Conference on Artificial Neural Networks (ICANN-2005), September 11-15, 2005, Warsaw, Poland. ? Coventry K.R., Cangelosi A., Joyce, D., Rajapakse, R., Bacon A., and Richards, L. V. (in preparation) ¡°Spatial Language and perceptual symbols: Implementing the functional geometric framework. For submission to Psychological Review or Cognitive Psychology. ? Coventry K.R., Cangelosi A., Bacon A., Newstead, S. and Rajapakse, R. K. (2005) ¡°Grounding number in perception: Vague Quantifiers and Visual Attention", Cognitive Psychology. ? Coventry K.R., Cangelosi A., Newstead S.N., Bacon A., Rajapakse R., (2005) ¡°Grounding natural language quantifiers in visual attention¡±. Twenty-seventh annual conference of Cognitive Science Society, Stresa, Italy. ? Rajapakse, R.K., Cangelosi, A., Coventry, K.R., Newstead, S. and Bacon, A.,(2005) "Grounding Linguistic Quantifiers in Perception: Experiments on Numerosity Judgments", Proceedings of the 2nd Language and Technology Conference: Human Language Technologies as a challenge for Computer Science and Linguistics (L&T'05), April 21-23, 2005, Poznan, Poland. Publisher: Wydawnictwo Poznanskie Sp. z o.o. ISBN 83-7177-341-2. ? Cangelosi, A., Coventry, K.R., Rajapakse, R., Bacon, A., and Newstead, S.N.(2005), Grounding language in perception: A connectionist model of spatial terms and vague quantifiers. In A. Cangelosi, G. Bugmann and R. Borisyuk, editors, Modelling Language, Cognition and Action: Proceedings of the 9th Neural Computation and Psychology Workshop. Singapore: World Scientific, (Book chapter). ? Cangelosi A., Coventry K.R., Rajapakse R., Bacon A. & Newstead S.N. (2004), Grounding language in perception: A connectionist model of spatial terms and vague quantifiers. In Book of Abstracts of the 9th Neural Computation and Psychology Workshop (NCPW9), Plymouth, 2004, p. 16 ? Rajapakse, R.K. and Denham, M. (2003), ¡°A Reinforcement Learning Strategy for (formal) Concept and Keyword Weight Learning for Adaptive Information Retrieval¡± , Proceedings of the 7th World Multiconference on Systemics Cybernetics and Informatics (SCI¡¯2003), Orlando, Florida USA, July 2003. Also appeared in the workshop
- 5. proceedings of the ¡°User Modeling, Information Retrieval and Machine Learning¡± workshop of the 9th International Conference on User Modeling (UM¡¯2003). ? Rajapakse, R.K. and Denham, M. (2002), ¡°Information Retrieval Model Using Concept Lattices for Content Representation¡±, FCA KDD workshop of the 15th European Conference on Artificial Intelligence (ECAI¡¯02), July 21-26 2002, Lyon, France. ? Rajapakse, R.K. and Denham, M. (2002),¡°A Concept based Adaptive Information Retrieval Model using FCA-BAM combination for concept representation¡±, Proceedings of the 24th BCS-IRSG European Colloquium on IR Research (ECIR¡¯02), March 25-27, 2002, Glasgow, UK ? Rajapakse, R.K., Seneviratne, K. and Weerasinghe, R. (1996),"A Neural Network Based Character Recognition System for ¡®Sinhala¡¯ Script", Proceedings of the South East Asian Regional Computer Confederation, Conference and Cyberexhibition (SEARCC'96), Bangkok , Thailand , July 4 - 7th 1996 RESEARCH INTERESTS Digital information management, meta-tagging for knowledge management Text processing, Intelligent information retrieval, Knowledge representation Neural Networks and Adaptive behavioursystems. Machine Learning and pattern recognition. Computer vision based on human vision system. REFERENCES o Prof. Mike Denham University of Plymouth, Plymouth PL4 8AA Email : mdenham@plymouth.ac.uk o Prof. Angelo Cangelosi Professor in Artificial Intelligence and Cognition School of Computing, Communications and Electronics, University of Plymouth, Plymouth PL4 8AA Email : acangelosi@plymouth.ac.uk Tel : +(44)-(0)1752-232559 Fax: + (44)-(0)1752-232540 o Mr. Brian Mushens, Program Director (Computing), School of Computing Communications and Electronics, University of Plymouth, Plymouth PL4 8AA Email : bmushens@plymouth.ac.uk Tel : +(44)-(0)1752-232544 Fax: +(44)-(0)1752-232540