PublicationsPenerbitan

Variance-Based Stratified Undersampling with Capacity-Aware Sampling Control for Imbalanced Tabular Classification

Mohd Hafiz Zakaria, Jafreezal Jaafar, Irving V. Paputungan, Said Jadid Abdulkadir

International Journal of Advanced Computer Science and Applications (IJACSA), vol. 17

Preliminary investigation of balanced stratified reduction (BSR) for imbalanced datasets

M. H. Zakaria, J. Jaafar, S. J. Abdulkadir

IEEE International Conference on Artificial Intelligence in Engineering and Technology (IICAIET), pp. 55–60

Introduces Balanced Stratified Reduction (BSR), a sampling technique for imbalanced data that stratifies the majority class horizontally, inspired by boxplots. Early tests on the PIMA Indian Diabetes and Haberman’s Survival datasets show it balances the classes while keeping key information from the majority class.

60-year research history of missing data: a bibliometric review on Scopus database (1960–2019)

Farah Adibah Adnan, Mohd Hafiz Zakaria, Safwati Ibrahim

Applied Mathematics and Computational Intelligence 9, 75–86

A bibliometric review of 6,227 Scopus journal articles on missing data from 1960 to 2019, mapping growth, countries, subject areas and keywords. Research took off around 2016, led by the United States and by mathematics, decision sciences, medicine and computer science.

Solving university course timetabling problems using FET software

Wan Zuki Azman Wan Muhamad, Farah Adibah Adnan, Zainor Ridzuan Yahya, Ahmad Kadri Junoh, Mohd Hafiz Zakaria

AIP Conference Proceedings 2013, 020052

Shows how the free, open-source FET software was adapted to produce the university course timetable at UniMAP, which was previously built largely by hand with a little help from Excel.

Solving examination timetabling problems at the University of Malaysia Perlis through adaption of FET software

Wan Zuki Azman Wan Muhamad, Farah Adibah Adnan, Zainor Ridzuan Yahya, Ahmad Kadri Junoh, Mohd Hafiz Zakaria

AIP Conference Proceedings 2013, 020051

Applies FET software to examination timetabling across UniMAP’s campuses, using real data and comparing the results with the manual timetable.

Elliott wave pattern recognition for forecasting GBP/USD foreign exchange market

M. F. Ramli, A. K. Junoh, W. Z. A. W. Muhamad, M. H. Zakaria, A. M. Desa, A. W. Mahyun

Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 10, 31–35

Uses Elliott wave patterns to forecast the GBP/USD exchange rate. Linear discriminant analysis classified the patterns with 99.43% accuracy, and the 38.2% Fibonacci retracement level gave the best forecasts.

A Comparative Study on Whole Body Vibration (WBV) Comfort towards Compact Car Model through Data Mining Approach

Mohd Zulfadzlie Abdullah, Ahmad Kadri Junoh, Wan Zuki Azman Wan Muhamad, Afifi Md Desa, Mohd Hafiz Zakaria

Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 10, 1–7

Groups vibration measurements from three compact cars into five comfort levels using K-Means, then checks the clusters with K-nearest neighbour, linear discriminant analysis and ANOVA.

Formulation of noise isolation index for evaluating the interior acoustics level in vehicle cabin

Adel Mohammed AlDhahebi, Ahmad Kadri Junoh, Afifi Md Desa, Mohd Hafiz Zakaria, Amran Ahmed

Advances in Mechanical Engineering 10(4)

Proposes a noise isolation index to rate acoustic comfort inside a vehicle cabin, developed and tested on three popular Malaysian compact cars across stationary and moving road conditions.

Weighted linear goal programming approach for solving budgetary manufacturing process

Mo’ath Alluwaici, Ahmad Kadri Junoh, Mohd Hafiz Zakaria, Afifi Md Desa

Far East Journal of Mathematical Sciences 101(9), 1993–2021

Compares linear programming with weighted goal programming for a food company’s production budget. The weighted goal programming model produced the highest profit.

The anxiety level versus performance in mathematics for engineering undergraduates in UniMAP

Mohd Hafiz Zakaria, Nor Hizamiyani Abdul Azziz, Nornadia Mohd Yazid, Syafawati Ab Saad

AIP Conference Proceedings 1775, 030078

Surveys 1,274 first-semester engineering undergraduates with an adapted Abbreviated Mathematics Anxiety Rating Scale. Anxiety was moderate overall, and male and female students did not differ.

Exploring mathematics anxiety among first year business students: UniMAP experience

Afifi Md Desa, Syafawati Ab Saad, Siti Aisyah Zakaria, Mohd Hafiz Zakaria

AIP Conference Proceedings 1775, 030069

Explores mathematics anxiety among first-year business students at UniMAP, comparing levels by gender, race and highest entry qualification.

Implementation of graduate employability skills SJT instrument in Universiti Utara Malaysia

Mohd Hafiz Zakaria, Bidin Yatim, Suzilah Ismail

AIP Conference Proceedings 1635, 962–965

Applies a 12-item Situational Judgment Test of employability skills to 1,012 final-year UUM undergraduates and uses bootstrap norm scores to define low, moderate and high levels.

A new approach in measuring graduate employability skills

Mohd Hafiz Zakaria, Bidin Yatim, Suzilah Ismail

AIP Conference Proceedings 1602, 1202–1208

Develops a valid and reliable 12-item Situational Judgment Test that measures five employability skills: communication, professional ethics, entrepreneurship, critical thinking and personal quality.

Development of Situational Judgment Test (SJT) Instrument to Measure the Employability Skills of Graduates

Mohd Hafiz Zakaria

Universiti Utara Malaysia

Develops and validates a situational judgment test of graduate employability skills, then uses bootstrap norm scores to show that respondents rated high on professional ethics and moderate on the other skills.

Instrumen kebolehpasaran graduan

Bidin Yatim, Suzilah Ismail, Mohd Hafiz Zakaria

Universiti Utara Malaysia

Argues that the My3S instrument cannot measure graduates’ employability skills accurately and proposes a more realistic situational judgment test, after reviewing existing instruments and explaining the SJT method.