HAFEZ IBRAHIM, JAMALLUDIN TALIB, NORMAH MAAN, Inverse Model to Determine the Optimal Number of Drops of RDC Column Using Fuzzy Approach, WSEAS TRANSACTIONS on MATHEMATICS, ISSN: 1109-2769, VOL 10, April 2011, pp. 149-158.
Latex workshop in 8-9 November 2010 at C22-309, Department of Mathematics UTM, Malaysia.
Applied Complex Analysis seminar series part (1), semester II, 12 January 2011, seminar room 1, Ibnu Sina, Institute, UTM, Skudai, Malaysia.
Algebra Seminar Series, Semester II, 10 February 2011, Meeting and Seminar room, Dept of Mathematics at C22- 81310, U TM, Skudai, Malaysia.
First Biennial International Group Theory Conference (Organizing Committee), 14-18 February 2011, Ibnu Sina Institute, UTM, Skudai, Malaysia.
Mathematics in Industry, 1st Mathematics in Industry Study Group, 14-18 March 2011, UTM Johor Bahru, Malaysia. 3
HAFEZ IBRAHIM, JAMALLUDIN TALIB, NORMAH MAAN, FUZZY INVERSE MODEL TO DETERMINE THE INPUT ANDOUTPUT NUMBER OF DROPS OF RDC COLUMN, NATIONAL SCIENCE POSTGRADUATE CONFERENCE 201(NSPC2011), IBNU SINA, INSTITUTE FOR FUNDAMENTAL SCIENCE STUDIES, UTM, SKUDAI, MALAYSIA, NOV 2011
PRESENTING SKILLS SEMINAR, Ibnu Sina, Institute For Fundamental Science Studies, UTM, Skudai, Malaysia, May 2012.
INNOVATIVE KNOWLEDGE TRANSFER TRAINING WORKSHOP, Ibnu Sina, Institute for Fundamental Science Studies, UTM, Skudai, Malaysia, May 2012.