Visiting Research Scholar at North Dakota State University, USA. January 2009 to September 2009
Resumed duties as a Lecturer at the Department of Computer Science and Engineering, University of Moratuwa. (from September 2007)
Graduate Research Assistant for Dr. William Perrizo, Department of Computer Science, North Dakota State University (from May 2001 – August 2007)
Graduate Research Assistant for Dr. Kendall Nygard, Department of Computer Science, North Dakota State University (from May 2001 – August 2001)
Graduate Teaching Assistant at the Department of Computer Science, North Dakota State University (from August 2000 – May 2001)
Student Trainer at the Technology Learning Center, North Dakota State University. (from January 2001 – May 2001)
Lecturer (Probationary) at the Department of Computer Science and Engineering, University of Moratuwa. (from February 2000)
Instructor / System Analyst / Programmer at the Department of Statistics and Computer Science, University of Colombo. Includes administration of Computer networks on UNIX, Novell Netware, & Windows NT environments. (from 1998 October – February 2000)
Lecturer in Program Design for B.Sc. second year students. (from 1999 June - Feb. 2000)
Visiting lecturer for the National Institute of Business Management, The Open University of Sri Lanka and The Institute of Computer Technology. (from 1998 October)
Research Assistant for the Department of Civil Engineering University of Moratuwa (1992 August - 1994 April)
Data Entry Operator for Data Entry International Ltd. , Colombo. (1992 Jan. to 1992 July.)
2010, NASA, USA, Conference for Intelligent Data Understanding - Proceedings Chair
NM De Mel, HH Hettiarachchi, WPD Madusanka, GL Malaka,".Machine learning approach to recognize subject based sentiment values of reviews.",MERCon,,2016,
CD Chitraranjan, AM Denton,".A Complete Observation Model for Tracking Vehicles from Mobile Phone Signal Strengths and Its Potential in Travel-Time Estimation.",IEEE 84th International Conferance on Vehicular Technology,Totonto, Canada.,2016,7-Jan
Hiroshi de Silva,".Amal Shehan Perera Amal Shehan Perera Missing data imputation using Evolutionary k-Nearest neighbor algorithm for gene expression data.",IEEE International Conferance on Advances in ICT for Emerging Regions (ICTer)n Vehicular Technology,Colombo, Sri Lanka.,2016,141-146
Dinithi Sumanaweera,".An ensemble based in-silico prediction of Saccharomyces cerevisiae proteins under mitochondrion organization.",IEEE International Conference on Bioinformatics and Bioengineering,Taichung City, Taiwan,2016,13-20
Thilina Rathnayake, Maheshakya Wijewardena, Thimal Kempitiya, Kevin Rathnasekara, Thushan Ganegedara, Damminda Alahakoon,".Investigation of Node Deletion Techniques for Clustering Applications of Growing Self Organizing Maps.",International Symposium on Intelligent Data Analysis,Saint-Etienne, France.,2015,229-240
E Uduwaragoda, SAD Dias
,".Lane level road data generation to enable intelligent transportation system (ITS) applications.",Institute of Engineers, Sri Lanka : transctions,,2015,
Charith D Chitraranjan, Anne M Denton,".Tracking vehicle trajectories by local dynamic time warping of mobile phone signal strengths and its potential in travel-time estimation enable intell.",2015 IEEE International Conference on Pervasive Computing and Communication (PerCom)),St. Louis, USA,2015,445-450
Karannagoda, EL; Herath, HMTC; Fernando, KNJ; Karunarathne, MWID; De Silva, NHND; Perera, AS; Document analysis based automatic concept map generation for enterprises, 2013 International Conference on Advances in ICT for Emerging Regions (ICTer), , pp154-159, 2013, IEEE
Rathnayake, Thilina; Wijewardena, Maheshakya; Kempitiya, Thimal; Rathnasekara, Kevin; Ganegedara, Thushan; Perera, Amal S; Alahakoon, Damminda; Investigation of Node Deletion Techniques for Clustering Applications of Growing Self Organizing Maps Advances in Intelligent Data Analysis XIV, 229-240, 2015, Springer.
Chitraranjan, Charith D; Perera, Amal S; Denton, Anne M; Tracking vehicle trajectories by local dynamic time warping of mobile phone signal strengths and its potential in travel-time estimation, Pervasive Computing and Communication Workshops (PerCom Workshops), 2015 IEEE International Conference on, pp 445-450, 2015, IEEE
Uduwaragoda, ERIACM; Perera, AS; Dias, SAD; Lane level road data generation to enable intelligent transportation system (ITS) applications, 2015
Bandara, WMC; Perera, AS; Alahakoon, D; Churn prediction methodologies in the telecommunications sector: A survey ICTER 2014,
Gunawardhana, CLR; Hasanthika, HHM; Piyasena, TDG; Pathirana, SPDP; Fernando, S; Perera, AS; Kohomban, U; Representation of web based graphics and equations for the visually impaired, 2014
Herath, HMTC; Fernando, KNJ; Karannagoda, EL; Karunarathne, MWID; De Silva, NHN; Perera, AS; Document analysis based Automatic Concept Map Generation for Enterprises, 2014
Ganegedara, KMTV; Vidana Pathiranage, LC; Gunarathna, UARR; Wijeweera, BS; Perera, AS; Alahakoon, D; Extending dynamic SOMs to capture incremental changes in data, International Joint Conference on, Neural Networks (IJCNN), 2014 ,pp 1231-1238, 2014, IEEE
Gunasinghe, ULDN; De Silva, WAM; de Silva, NHND; Perera, AS; Sashika, WAD; Premasiri, WDTP; Sentence similarity measuring by vector space model, 2014 International Conference on Advances in ICT for Emerging Regions (ICTer), 185-189 2014 IEEE
De Silva, NHND; Perera, AS; Maldeniya, MKDT; Semi-supervised algorithm for concept ontology based word set expansion, 2013 International Conference on Advances in ICT for Emerging Regions (ICTer), pp125-131, 2013, IEEE
Fernando, CSNJ; Maldeniya, MKDT; Wijeratne, DNC; Perera, AS; Goertze, B; De Silva, NHND; SeMap-mapping dependency relationships into semantic frame relationships, ERU 2013.
Buddhika, KT; Jayamanne, DP; Wijegunawardana, PP; Gunasekera, RC; Perera, AS; AI techniques for decision making systems: a survey, ERU 2013
E.R.I.A.C. Manel, S. Perera and D. Dias, Generating Lane Level Maps from Vehicle TrajectoriesUsing Kernel Density Estimation, 16th International IEEE Conference on Intelligent Transportation Systems, Hague, Netherlands, October 2013.
de Silva, N.D., Weerawarana, S.M., Perera, A.S., Enabling effective synoptic assessment via algorithmic constitution of review panels, Teaching, Assessment and Learning for Engineering (TALE), 2013 IEEE International Conference on Teaching, Assessment and Learning for Engineering, Bali, 26-29 Aug. 2013, pp 776 – 781.
Buddhika De Alwis, Supun Malinga, Kathiravelu Pradeeban, Denis Weerasiri, Shehan Perera, “Horizontal Format Data Mining with Extended Bitmaps,” Journal of Computer Information Systems and Industrial Management Applications. ISSN 2150-7988 Volume 4 (2012) pp. 514–521.
Amal Perera, William Perrizo, “Efficient K-Median Clustering with Bit Sliced Column Data,” NASA CIDU - Conference on Intelligent Data Understanding, October 4-5, 2010, San Francisco, CA.
Tingda Lu, Yan Wang, William Perrizo, Amal Perera, Gregory H. Wettstein, “Extension Study on Item-Based P-Tree Collaborative Filtering Algorithm for Netflix Prize,” Proceedings of the ISCA 25th International Conference on Computers and Their Applications, CATA 2010, March 24-26, 2010, Honolulu, Hawaii, USA, ISBN 978-1-880843-75-8 pp180-185.
Sajith Weerakoon, Rohan Wickramasinghe, Erangi De Costa, Manisha Eleperuma, Shehan Perera, Sanath Jayasena: Semantic Metadata Extraction Using XemanticA Analysis. Proceedings of the 2010 International Conference on Semantic Web & Web Services, SWWS 2010, July 12-15, 2010, Las Vegas, Nevada, USA. CSREA Press 2010, ISBN 1-60132-161-9 pp178-183
Perrizo; William K., Abidin; Taufik Fuadi, Perera; Amal Shehan, Serazi; Masum, “Method and system for data mining of very large spatial datasets using vertical set inner products,” United States Patent, 7,836,090. November 16, 2010.
Buddhika De Alwis, Supun Malinga, Kathiravelu Pradeeban, Denis Weerasiri, and Shehan Perera "Horizontal Format Data Mining with Extended Bitmaps," Soft Computing and Intelligent Pattern Recognition - SoCPaR, December 7-10, 2010, Paris, France.
Amal Shehan. Perera, D. G. Niroshinie Dayaratne (PG Student) and William Perrizo, Evolutionary Nearest Neighbour Classification Framework, International Conference on Software Engineering and Data Engineering July 2009, NV, USA.
Amal Shehan Perera and William Perrizo (Research Colleague), Gene Function Prediction, International Conference on Software Engineering and Data Engineering July 2009, NV, USA.
Tingda Lu (Research Colleague), William Perrizo, Yan Wang, Gregory Wettstein and Amal Shehan Perera, Experimental Study on Item-based P-Tree Collaborative Filtering Algorithm for Netflix Prize, International Conference on Software Engineering and Data Engineering July 2009, NV, USA.
William Perrizo (Research Colleague), Gregory Wettstein, Amal Shehan Perera and Tinga Lu, The Universality of Nearest Neighbor Sets in Classification and Prediction, International Conference on Software Engineering and Data Engineering July 2009, NV, USA.
B.B. Akila Geethal (UG Student), R. Chulaka Gunasekara, Mafaz Hassan, C.D. Tharindu Mathew, A. Shehan Perera, Yohan Welikala, Prophetia: Artificial Intelligence for TravelBox® Technology, Proceedings of The Second International Workshop on Advanced Computational Intelligence (IWACI2009) Mexico City, Mexico, June 22-23, 2009
D.A.Meedeniya(PG Student), A.S.Perera, Evaluation of Partition-Based Text Clustering Techniques to Categorize Indic Language Documents, IEEE International Advanced Computing Conference (IACC '09), India, March 2009.
Awareness of Data Warehousing and Mining in the Banking Sector of Sri Lanka, S.L Kulatilake (PG Student), A. Shehan Perera, Proceedings of the 6th International Conference on Business Management - 2009 (ICBM 2009), Colombo, Sri Lanka, ISBN: 978-955-9054-75-7, Published by the Faculty of Management Studies and Commerce, University of Sri Jayawardenepura.
AS Perera and D Meedeniya, A Comparative Study on Data Representation to Categorize Text Documents. SEKE 2008, pp. 371-374, July 2008, San Francisco CA, USA.
Amal Perera and William Perrizo. Parameter Optimized, Vertical, Nearest-Neighbor-Vote and Boundary-Based Classification, In Proceeding of the 21st International Conference on Computers and Their Applications (CATA-07), March 2007, Honlulu, Hawai, USA.
William Perrizo and Amal Perera, Parameter Optimized, Vertical, Nearest-Neighbor-Vote and Boundary-Based Classification, ACM SIGKDD Explorations, Vol. 8 No. 2 pp. 63-69, December 2006.
Amal Perera,Taufik Abidin, Masum Serazi, George Hamer, and William Perrizo. Vertical Set Square Distance Based Clustering without Prior Knowledge of K. In Proceeding of the 14th International Conference on Intelligent and Adaptive Systems and Software Engineering (IASSE-05), July 20-22, 2005, Toronto Canada.
Masum Serazi, Amal Perera,Taufik Abidin, George Hamer, and William Perrizo. An API for distributed Transparent Vertical Data Mining. In Proceeding of the 14th International Conference on Intelligent and Adaptive Systems and Software Engineering (IASSE-05), July 20-22, 2005, Toronto Canada.
Amal Perera and William Perrizo. Vertical K-Median Clustering, In Proceeding of the 21st International Conference on Computers and Their Applications (CATA-06), March 23-25, 2006 Seattle, Washington, USA
Taufik Abidin, Amal Perera, Masum Serazi, and William Perrizo. Vertical Set Square Distance: A Fast and Scalable Technique to Compute Total Variation in Large Datasets. In Proceeding of the 20th International Conference on Computers and Their Applications (CATA-05), March 16-18, 2005, New Orleans, Louisiana, USA,
P-tree Classification of Yeast Gene Deletion Data., Amal Perera, Anne Denton, Pratap Kotala, William Jockheck,Willy Valdivia Granda,William Perrizo, SIGKDD Explorations, Volume 4, Issue 2, December 2002.
Multi-Layered Framework for Distributed Data Mining, Masum Serazi, Amal Perera, Qiang Ding, Vasiliy Malakhov, and William Perrizo.,13th International Conference on Intelligent and Adaptive Systems and Software Engineering (IASSE'04), Nice, France, July 2004.
DataMIME™, Mine it More Efficiently, Masum Serazi, Amal Perera, Qiang Ding, Vasiliy Malakhov, Imad Rahal, Fen Pan, Dongmei Ren, Weihua Wu, and William Perrizo. ACM SIGMOD, Paris, France, June 2004.
Genetic Algorithm to improve a solution for the General Assignment Problem, Paul Juell, Amal S. Perera, Kendall E. Nygard 16th International Conference on Computer Applications in Industry and Engineering, Las Vegas, Nevada USA, November 2003.
Construction of Yeast Protein Interaction network using KNN, Genetic Algorithms and Gene Annotation Data, Valdivia-Granda, W. A., Perrizo W, Perera, A. Denton, A., Jockheck W., Genome Informatics Conference, Cold Springs Harbor Laboratory, Cold Spring Harbor, New York, May 2003.
Multi Media Data Mining using P-Trees., William Perrizo, William Jockheck, Amal Perera, Dongmei Ren, Weihua Wu, Yi Zhang, Extended version for book chapter, Mining Multimedia and Complex Data, Springer-Verlag Heidelberg, Volume 2797 / 2003 pp. 100 – 117, ISBN: 3-540-20305-2.
Performance Improvement for Bayesian Classification on Spatial Data with P-Trees., Amal S. Perera, Masum H. Serazi, William Perrizo, 15th International Conference on Computer Applications in Industry and Engineering, San Diego, California USA, November 2002.
Multi Media Data Mining using P-Trees., William Perrizo, William Jockheck, Amal Perera, Dongmei Rean, Weihua Wu, Yi Zhang, Multimedia Data Mining Workshop KDD 2002, Edmonton Canada, June 2002.
Data Mining of Microarray Data using Association Rule Mining., Pratap Kotala, Willy Waldiviya, William Perrizo, A.S. Perera, First Virtual Conference on Genomics and Bioinformatics, ND. 2001.
Vehicular Traffic Control Signal Sequence Optimizer Using Genetic Algorithms,A.S. Perera, K.A.C.N. Jayawardena, H.D.K. Moonesinghe S. K. Halgamuge, D.N. Ranasinghe, Proc. Second International Information technology conference, Colombo Sri Lanka 1999.
The Limitless Boundaries of Space, A.S. Perera, Annual Science Journal, Prince of Wales College, Moratuwa, Sri Lanka, 1990.