Prof.(Dr.)A. Jahufar

Cinque Terre

Senior Professor in Applied Statistics
Dept. of Mathematical Sciences
Faculty of Applied Sciences

Research Gate
Google Scholar
ORCID ID

Basic Information

PROF. (DR.) A. JAHUFAR

Designation Senior Professor in Applied Statistics
Department / Unit Dept. of Mathematical Sciences
Faculty Faculty of Applied Sciences
Tele. No. +94 67 2279000
Mobile No. +94 71 4899488
Email jahufer@seu.ac.lk
jahufer@yahoo.com
ajahufer@gmail.com

Qualifications

  • B.Sc. (Hons.) (UPDN)
  • M.Sc (UPDN)
  • M.Phil.(UPDN)
  • Ph.D. in Statistics (XMU China)

Positions Held

  • Director Science Research Centre, Faculty of Applied Sciences (FAS), SEUSL
  • Chairman Faculty Research and Management Committee, FAS, SEUSL
  • Acting Dean, Faculty of Applied Sciences, SEUSL.
  • Head, Dept. of Mathematical Sciences Faculty of Applied Sciences, SEUSL
  • Head, Mathematics and Computer Unit, SEUSL
  • Chairman, Sports Advisory Board, SEUSL
  • Director, Centre for Extension Studies, SEUSL
  • Coordinator, Postgraduate Diploma in Applied Statistics, FAS, SEUSL
  • Subject Coordinator, Applied Statistics Subject, FAS, SEUSL
  • Coordinator, Special Degree in Applied Statistics Programme, FAS, SEUSL
  • Coordinator, Diploma Programmes, Centre for Extension Studies, SEUSL
  • Board of Director, LEARN, UGC
  • Head, Improving IT Programme, IRQUE World Bank Project
  • Grand Coordinator, EDP/UDG, HETC World Bank Project
  • Activity Coordinator, QIG/UDG, HETC World Bank Project
  • Students’ Counsellor, FAS, SEUSL
  • Academic Warden, SEUSL
  • Sub- Warden, SEUSL
  • Deputy Proctor, FAS, SEUSL

Teaching Areas

  • Basic Statistics
  • Inferential Statistics
  • Sampling Techniques
  • Mathematical Statistics
  • Regression Analysis
  • Survey Design and Sampling Techniques
  • Multivariate Data Analysis
  • Censes Data Analysis
  • Computational Data Analysis
  • Computational Statistics
  • Statistical Modeling
  • Econometrics
  • Biased Estimators
  • Analysis of Large and Complex Data Sets
  • Panel Data Models
  • Index Numbers
  • Bayesian Statistics
  • Financial Time Series Models
  • Theory of Statistics
  • Applications of Statistics in Business and Social Science

Research Interest

  • Principal Component Analysis
  • Econometrics
  • Panel Data Models
  • Ridge Type Estimators
  • Multivariate Statistics
  • Business Statistics and Time Series Models
  • Biased Estimators
  • Multivariate Analysis
  • Panel Data Analysis
  • Data Mining

Editorial works

  • Reviewer for Journal of Management, SEUSL.
  • Reviewer for International Journal of Mathematics and Computer Applications Research (JMCAR) USA, UK, Singapore, Qatar and India
  • Editorial board member for Open Journal Statistics USA
  • Editorial Board Member, International Journal of Mathematics and Computer Applications Research (IJMCAR), India.
  • Editorial Board Member, International Journal of Research in Science & Technology, IRA Publications, India.
  • Editorial Board Member, Journal of Engineering and Applied Mathematics, DJ Publications, India.
  • Reviewer British Journal of Mathematics and Computer Science.
  • Reviewer for Journal of Management, SEUSL.
  • Reviewer for International Journal of Mathematics and Computer Applications Research (JMCAR) USA, UK, Singapore, Qatar and India
  • Reviewer for articles, 1st International Symposium held on 19-21 April 2011, SEUSL.
  • Reviewer for articles, Third Annual Research Session at Vavuniya Campus of the University of Jaffna, Sri Lanka.
  • Reviewer for articles, First, Second, Third and fourth Annual Research Session at Faculty of Applied Sciences, SEUSL.
  • Reviewer for articles in the First, Fourth Annual Research Session at Faculty of Management and Commerce, SEUSL.
  • Reviewer for articles, First, Second, Third, Fourth and Fifth Symposium SEUSL.
  • Reviewer of External Degree Programme (EDP-ODL System)
  • Chairperson for 1st International Symposium held on 19-21 April 2011, SEUSL.
  • Chairperson for 2nd International Symposium held on 25-27 May 2012, SEUSL.
  • Co-editor of 8th International Symposium (IntSym-2018)- SEUSL
  • Co-editor of 8th International Symposium (IntSym-2018)- SEUSL
  • Co-editor of 8th International Symposium (IntSym-2018)- SEUSL

Journal Articles

  • Haalisha, A and Jahufer, A. (2018). Impact of Consumer Price Index and Gross Domestic Saving on Economic Growth in Sri Lanka: An Econometric Analysis Using Johansen Co-Integration Approach. International Journal of Innovative Research and Development, DOI No.:10.24940/ijird/2018/v7/i8/AUG18054, Vol. 7, Isue 8, pg. 184-191.
  • Jahufer, A. (2017). Identifying Anomalous Cases in Modified Liu Estimator. Journal of KASMERA, Vol. 45, (Published in Venezuela).
  • Jahufer, A. (2015). Are there any Relationship between Demographic Factors and Job Satisfaction of Government School Teachers? : Case Study Kalmunai Educational Zone in Sri Lanka. International Journal of Business and Management Research, 8(1), pp. 41-49. (ISSN: 1938-0429), (Published in USA).
  • Jahufer, A. (2015). Choosing the Best Performing GARCH Model for Sri Lanka Stock Market by Non-Parametric Specification Test. Journal of Data Science. 13(3), pp. 457-472. (ISSN: 1680-743X), (Published in Taipei – Taiwan).
  • Jahufer, A. (2015). Determinants of Job Satisfaction among Government and Private Bank Employees in Sri Lanka (Case Study: Ampara Region). International Journal of Management and Business Research. 5(2), pp. 159-168, (ISSN: 2228-7027), (Published in Iran).
  • Jahufer, A. (2014). Identifying Unusual Observations in Ridge Regression Linear Model Using Box-Cox Power Transformation Technique. Open Journal of Statistics, Vol. 4, pp. 19-26, (ISSN: 2161-7198), (Published in USA).
  • Jahufer, A. and Sarjoon, M.H.M. (2014). Analyzing the Impact of Intrinsic Job Satisfaction of Government School Teachers Special Reference to Kalmunai Educational Zone, Sri Lnaka, Journal of Management, SEUSL. Vol. 10 No. 1, pp. 34-41. (ISSN 1391-8230).
  • Jahufer, A. and Mohammed Irfan S.S. (2014). Contribution of Macroeconomic Factors on the Stock Market Performance in Sri Lanka. Journal of Management, SEUSL. Vol. 10 No. 1, pp. 1-9. (ISSN: 1391-8230).
  • Jahufer, A. and Rifkhan Ahamed, M.I. (2014). Relationship of Demographic Factors to Ability Utilization of Job Satisfaction of Government and Private Bank Employees in Ampara Region – Sri Lanka. Journal of Management, SEUSL. Vol. 11 No. 1, pp. 58-66. (ISSN: 1391-8230).
  • Jahufer, A. (2013). Detecting Global Influential Observations in Liu Regression Model. Open Journal of Statistics, Vol. 3, pp. 5-11, (ISSN: 2161-7198), (Published in USA).
  • Jahufer, A. and Jianbao, C., (2012). Identifying Local Influential Observations in Liu Estimator. Metrika, Vol. 75, 3, pp. 425-438. (SCI – Journal), Springer, (ISSN: 0026-1335), (Published in German).
  • Jahufer, A. and Jianbao, C., (2011). Measuring Local Influential Observations in Modified Ridge Regression. Journal of Data Science, Vol.9, 3, pp. 359-372. (ISSN: 1680-743X) (Published in Taipei – Taiwan).
  • Jahufer, A. (2011). Collinearity Affects and It’s Analysis in Data. Journal of Management, SEUSL. Vol. VII, No.1, pp. 101-113. (ISSN 1391-8230).
  • Jahufer, A. and Jianbao, C., (2009). Assessing Global Influential Observations in Modified Ridge Regression. Statistics and Probability Letters, Vol. 79, 4, pp. 513-518. (ISSN: 0167-7152), (SCI – Journal) Elsevier, (Published in Netherland).
  • Jianbao, C., and Jahufer, A., (2009). Assessment of Anomalous Observations in Liu Estimator. Journal of Management. SEUSL. Vol. 5, No.1,pp. 41-49. (ISSN 1391-8230).
  • Jahufer, A. and Jianbao, C., (2008). Identifying Local Influence in Modified Ridge Regression Using Cook’s Method. Sri Lankan Journal of Applied Statistics, Vol. 9, 93-108. (ISSN 1391-4987).
  • Mustafizur Rahman, M.D., Athikur Rahman, M.D., Jahufer, A. and Jian Ping, Z., (2006). The Volatility Modeling of the Exchange Rate for SAARC Countries. Journal of Management. SEUSL. Vol. 4, No. 1, 68-73. (ISSN 1391-8230).
  • Jahufer, A. (2006). The Effect of ‘Z-score’ System on Qualification to Universities with Special Reference to Tamil Medium Schools in Ampara District, Sri Lanka. Journal of Management. SEUSL. Vol. 4, No.1, 58-67. (ISSN 1391-8230).
  • Jahufer, A. (2006). The Role of Principal Component Analysis in Growth Performance of Shorea Seedlings at Ratnapura District in Sri Lanka. Journal of Science in Infinitive, Faculty of Applied Sciences, SEUSL, Sri Lanka, Vol. 1, 12-16. (ISSN 1800-167X).
  • Jahufer, A. (2005). Growth Performance of Shorea Seedlings at Kalutara District In Sri Lanka. Journal of Management. SEUSL. Vol. 3, No. 1, 58-62. (ISSN 1391-8230).
  • Jahufer, A. (2004). Contribution of Ridge Type Estimators in Regression Analysis. Journal of Management. SEUSL. Vol. 2, No.1, 62-71. (ISSN 1391-8230).
  • Jahufer, A. and Wijekoon, P., (2003). A Monte Carlo Evaluation of New Biased Estimators in Regression Model. Sri Lankan Journal of Applied Statistics, SEUSL. Vol. 4, 37-46. (ISSN 1391-4987).
  • Jahufer, A. and Alibuhtto, M.C. (2016). Analyzing and Identifying Unusual Observations in Modified Liu Estimator Using Global Influence Technique. 5th Annual Science Research Sessions, Faculty of Applied Sciences, South Eastern University of Sri Lanka, pp. 44-50, (ISBN: 978-955-627-102-7).
  • Mayazir, N.N. and Jahufer, A. (2016). Polynomial Distributed lag Approach to Analyse the Factors Affecting Economic Growth of Sri Lanka. 5th Annual Science Research Sessions, Faculty of Applied Sciences, South Eastern University of Sri Lanka, pp. 65-80, (ISBN: 978-955-627-102-7).
  • Jayarathna, M.T.S. and Jahufer, A. (2016). Analysing Volatility Models for Gross Domestic Product of Sri Lanka From 2002 – 2015. 5th Annual Science Research Sessions, Faculty of Applied Sciences, South Eastern University of Sri Lanka, pp. 130-142, (ISBN: 978-955-627-102-7).
  • Nanayakkara, D.N.T.R.K. and Jahufer, A. (2016). Analysing the Factors Influencing on Type of Pregnant Mothers’ Delivery (Normal and Cesarean): A Case Study General Hospital Ampara. 5th Annual Science Research Sessions, Faculty of Applied Sciences, South Eastern University of Sri Lanka, pp. 173-180, (ISBN: 978-955-627-102-7).
  • Jahufer, A. (2015). Finding Suitable Statistical Model for Gross Domestic Product and Agriculture Related Factors. 5th International Symposium – 2015, South Eastern University of Sri Lanka, pp. 183-186, (ISBN: 978-955-627-063-1).
  • Jahufer, A. and Imras, A.H.M. (2015). Multiple Regression Approach to Fit Suitable Model for All Share Price Index with Other Important Related Factors. 4th Annual International Research Conference – 2015, Faculty of Management and Commerce, South Eastern University of Sri Lanka, pp. 231-237, (ISBN: 978-955-627-065-5).
  • Jahufer, A. and Sarjoon, M.H.M. (2014). Impact of Demographic Factors on Extrinsic Job Satisfaction of Government School Teachers - Special Reference to Kalmunai Educational Zone - Sri Lanka. Annual Research Session – 2014, Faculty of Management and Commerce, South Eastern University of Sri Lanka. (ISBN: 978-955-627-060-0).
  • Jahufer, A. and Rifkhan Ahamed, M.I. (2014). Analyzing the Extrinsic Job Satisfaction of Government and Private Bank Employees in Ampara Region, Sri Lanka. Annual Research Session – 2014, Faculty of Management and Commerce, South Eastern University of Sri Lanka, (ISBN: 978-955-627-060-0).
  • Jahufer, A. (2003). Selecting the Best Unbiased Estimator. Proceeding of the workshop on “Contemporary Social Issues in Sri Lanka”, pp. 147-152. South Eastern University of Sri Lanka, (ISBN: 955-627-012-4).
  • Jahufer, A. (2015). Calculating “Z” Score in G.C.E. (A/L) Examination. Magazine of Elavenil, Published by AL/Muneera High Girls School, Addalaichenai. pp. 28-32.

Fellowships, Awards & Distinctions

Scholarship
  • Ph.D Scholarship by Chinese Scholarship Council (CSC), Government of P.R. of China - 2006.
Prize and Award
  • Xiamen University Prize of Best International Student Encouraging Award in year - 2007.
  • Award of Appreciation, Colours Awarding Ceremony - 2012, SEUSL.
  • Recipient of Chinese Scholarship Council (CSC), Government of P.R. China to read PhD degree (September 2006 to June 2010)
  • Recipient of South Eastern University Scholarship to read MPhil degree (2000 to 2004)
  • Recipient of South Eastern University Scholarship to read MSc degree (1998 to 1999)
  • Research grant for the studies on Choosing the Best Performing “GARCH” Model for Sri Lankan Stock Market by Non-Parametric Specification Test - 2010.
  • Research grant for the studies on Analyzing and Identifying Unusual Observations in Modified Liu Estimator Using Global Influence Technique – 2015.
  • Research grant for the studies on Geometric Distributed Lag Structure and Economic Growth of Sri Lanka - 2018.

Workshops and Trainings

    • Training Programme on "Teaching Methodology" course, at Staff Development Centre, University of Peradeniya, Sri Lanka (2002)
    • Workshop on "Qualitative Analysis of Research Materials using NVivo 9x" conducted by the Higher Education for the Twenty First Century (HETC) Project, Ministry of Higher Education on 23-25 April 2012.
    • Workshop on "Multicast Hands-On" organized by Network Startup Resource Center National Agency for Science and Technology Information, Vietnam and Internet Educational Research laboratory (intERLab) Asian Institute of Technology, Thailand on 12-16 December 2011, at National Agency for Science and Technology Information, Hanoi, Vietnam.
    • Workshop on "Disaster Management" organized by the CIDA Restore Project, at the FAS, SEUSL, held on 28-29 October 2008.
    • Training workshop on "National High Education Management Information System (N-HEMIS)" Conducted by University of Colombo School of Computing, held on 18 July 2008.
    • Training workshop on "Quality Related Issues in Higher Education" organized by the Quality Assurance and Accreditation Council (QAAC), held on 11 October 2008.
    • Short course on "Actuarial Statistics: Mathematical and Computational Applications" organized by Post Graduate Institute of Science (PGIS), University of Peradeniya, held on 29-30 April 2006.
    • Workshop on "Information Technology (IT)" conducted by the Staff Development Centre of SEUSL, held on 27-29 September 2005.
    • Workshop on "Strategic Planning" conducted by SEUSL, held on 18, 20-21 January 2001.
    • One day session in "Computer Career Guidance Programme" conducted by SEUSL, held on 21 January 2001.
    • National Workshop on "Scientific Writing" organized by the PGIS and National Science Foundation (NSF), held on 15-17 September 2000.

Books Published

    • Jahufer, A. (2015). Identifying Anomalous Observation in Modified Ridge Regression Estimator and Liu Estimator Using Global and Local Influential Methods. Published by: Study Circle, Addalaichenai. ISBN: 978 955 42432 0 0
    • Jahufer, A. (2017). Business Statistics. Published by: CEDPL, South Eastern University of Sri Lanka. ISBN: 978-955-627-104-1.
    • Jahufer, A. (2017). Vanika Pulliviparaviyal. Published by: CEDPL, South Eastern University of Sri Lanka. ISBN: 978-955-627-105-8.
    • Jahufer, A. (2016). Business Mathematics. Published by: CEDPL, South Eastern University of Sri Lanka. ISBN: 978-955-627-076-1.
    • Jahufer, A. (2016). Vanikak Kanitham. Published by: CEDPL, South Eastern University of Sri Lanka. ISBN: 978-955-627-077-8.
    • Jahufer, A. (2016). Introductory Statistics. Published by: SARA Association for Research Activities. ISBN: 978-955-627-092-1.
    • Jahufer, A. (2016). Introduction to Statistics and Probability. Published by: SARA Association for Research Activities. ISBN: 978-955-627-093-8.
    • Jahufer, A. (2016). Theory of Statistics. Published by: SARA Association for Research Activities. ISBN: 978-955-627-094-5.
    • Jahufer, A. (2015). Influence Observations Analysis in Linear Ridge Type Biased Estimators. Published by: LAMBERT Academic Publishing. ISBN: 978-3-659-78744-7.
    • Jahufer, A. (2015). Identifying Anomalous Observation in Modified Ridge Regression Estimator and Liu Estimator Using Global and Local Influential Methods. Published by: SARA Association for Research and Publications. ISBN: 978-955-424-320-0.

Conference Publications

    • Roshan, AMF and Jahufer, A. (2018). Forecasting Sri Lankan Tourist Arrivals: A Comparative Study of Holt- Winter’s Method Versus ARIMA Model, 8th International Symposium-2018, South Eastern University of Sri Lanka.
    • Haalisha, A., and Jahufer, A. (2018). Time Series Modeling Approach for forecasting Electricity Demand in Sri Lanka. 8th International Symposium – 2018, South Eastern University of Sri Lanka.
    • Roshan, AMF and Jahufer, A. (2018). Customer Satisfaction and Awareness of Islamic Banking System in Ampara District. 5th International Symposiums. pp-57, Faculty of Islamic Studies and Arabic Language, SEUSL.
    • Haalisha, A., and Jahufer, A. (2018). Influences of Consumer Price Index and Gross Domestic Saving on Sri Lankan Economy: A Johansen Co-Integration Tactic. Seventh Annual Science Research Session. 15th, Nov. 2018, pp. 2, FAS, SEUSL.
    • Mayazir, NMM and Jahufer, A. (2018). Geometric Distributed Lag Analysis for Economic Growth of Sri Lanka. Seventh Annual science Research Session. 15th, Nov. 2018, pp. 10, FAS, SEUSL.
    • Roshan, AMF and Jahufer, A. (2018). Forecasting Sri Lankan Tourist Arrivals: Time Series Approach. Seventh Annual science Research Session. 15th, Nov. 2018, pp. 18, FAS, SEUSL.
    • Haalisha, A., and Jahufer, A. (2017). Determinants of Low Birth Weight using Logistic Regression Approach (Case study: Ampara District), Annual Research Session of Eastern University of Sri Lanka, 12-13, October 2017, Faculty of Health Care Sciences, Eastern University of Sri Lanla.
    • Haalisha, A and Jahufer, A. (2017). Forecasting Sri Lankan Inflation: Time Series Approach. Sixth Annual science Research Session. 28th, Nov. 2017, FAS, SEUSL
    • Mayazir, NMM and Jahufer, A. (2017). Analyzing Relationship between Import and Export of Sri Lanka Using Vector Autoregressive Approach. Sixth Annual science Research Session. 28th, Nov. 2017, FAS, SEUSL
    • Haalisha, A and Jahufer, A. (2017). Modeling and Forecasting Inflation Rates in Sri Lanka: An Implementation of SARIMA Models. International Statistical Conference. 28-19, Dec. 2017, Taj Samudra Hotel, Colombo, Sri Lanka.
    • Imras, A.H.M. and Jahufer, A. (2015). The Important Related Factors Contributed on All Share Price Index. 4th Annual Research Sessions – 2015, Faculty of Applied Sciences, South Eastern University of Sri Lanka, (ISBN: 978-955-627-065-5), pp. 231-237.
    • Sarjoon, M.H.M. and Jahufer, A. (2014). Relationship between Demographic Factors and Job Satisfaction of Government School Teachers - Special Reference to Kalmunai Educational Zone. Annual Science Research Session – 2014, Faculty of Applied Sciences, South Eastern University of Sri Lanka, pp. 7, (ISBN: 978-955-627-066-3).
    • Rifkhan Ahamed, M.I. and Jahufer, A. (2014). Determinants of Job Satisfaction among Government and Private Bank Employees in Ampara Region, Sri Lanka. Annual Science Research Session – 2014, Faculty of Applied Sciences, South Eastern University of Sri Lanka, (ISBN: 978-955-627-056-3).
    • Jahufer, A. (2012). Box-Box Transformation Technique to Detect Outliers in Ridge Regression. Annual Research Session – 2012, Faculty of Applied Sciences, South Eastern University of Sri Lanka, (ISBN 978-955-627-027-3).
    • Jahufer, A. (2011). Effect of Multicollinearity in Unbiased Regression Model. 1st International Symposium – 2011, PP. 177. South Eastern University of Sri Lanka, (ISBN 978-955-627-002-0).
    • Mohamed Riyas, M.A., and Jahufer, A. (2011). Analyzing the Performance Variation between Competitive and Non-Competitive Examinations among Grade 5 Students. 1st International Symposium – 2011, PP. 178. South Eastern University of Sri Lanka, (ISBN 978-955-627-002-0).
    • Jahufer, A. and Jianbao, C., (2008). Assessing Global Influential Observations in Modified Ridge Regression. International Statistics Conference – 2009. Applied Statistics Association of Sri Lanka (ASASL), (ISBN 978-955-0056-00-2).
    • Jahufer, A. and Jianbao, C., (2008). Identifying Local Influence in Modified Ridge Regression Using Cook’s Method. International Statistics Conference – 2009. Applied Statistics Association of Sri Lanka (ASASL). (ISBN 978-955-0056-00-2).
    • Jahufer, A. and Jianbao, C., (2008). Analyzing the Problems of Multicollinearity in the Data. International Conference on Social Sciences, Sri Lanka – 2008, PP. 237, University of Kaleniy, Sri Lanka (ISBN 978-955-904-464-2).
    • Jahufer, A. and Wijekoon, P., (2003). A Simulation Study on Ridge Type Biased Estimation. Peradeniya University Research Sessions PURSE – 2003, Sri Lanka, (ISBN 978-955-589-060-9).
    • Jahufer, A. and Wijekoon, M.W.W.M.P., (2001). Comparison of Ridge Regression Estimation and Ordinary Least Squares Estimation. Proceedings of the annual research sessions - 2001. University of Peradeniya, Sri Lanka, (ISBN 978-955-583-063-0).