Oral Presentation:
*2024*
The 2024 International Conference on Innovation in Open and Distance Learning (INNODEL). Based Talent & Interest Allocation Application. Medan, 14-15 November 2024.
*2023*
The 2023 International Conference on Innovation in Open and Distance
Learning (INNODEL). First Result-The TIA Application for Students’ Managing Talent in Distance Higher Education. Yogyakarta, 23-24 Oktober 2023
*2022*
The 35th AAOU Annual Conference 2022. Critical Success Factors for Non-Education Programs Graduates in Distance Learning. ICC Jeju, South Korea , 1-4 November 2022.
*2021*
- The 1st International Seminar of Science and Technology Society Development. N-Soft Sets: Literature Review & Research Potential. FST Universitas Terbuka, 14 Oktober 2021.
- International Conference on Innovation in Open and Distance Learning (INNODEL) 2021. Digital Transformation in Universitas Terbuka: Maturity Analysis. Universitas Terbuka, 15 November 2021.
*2019*
International Congress on Industrial and Applied Mathematics. The Multi-Fuzzy N-Soft Set and Its Operations, Valencia, Spanyol, 15-19 Juli, 2019.
*2018*
9th International Conference on Intelligent Systems, IS2018. Expanded Dual Hesitant Fuzzy Sets, Funchal, Portugal, 25-27 September 2018.
Internasional Conference on Basic Sciences and Its Application 2018. Prediction of Missing Data in N-Soft Sets, 23-24 Agustus 2018, Padang.
*2015*
The First International Conference on Statistical Methods in Engineering, Science, Economy, and Education (SESEE-2015), Soft Set Constraints for Decision Making, Universitas Islam Indonesia, Yogyakarta, 19-20 September 2015.
The 7th SEAMS Universitas Gadjah Mada, An Application of Probabilistic Soft Sets in A Decision Making, Univeritas Gadjah Mada, Yogyakarta, 18-21 Agustus 2015.
*2012*
Seminar 1st International Conference on Open and Distance e-Learning (1ICODEL), Implementation of Online Tutorial at Universitas Terbuka, Manila, Pilipina, 22-24 Februari 2012.
*2011*
Seminar Internasional Asian Association of Open Universities (AAOU), The Improvement of Academic Quality at Universitas Terbuka, Indonesia, Penang, Malaysia, 26 September–1 Oktober 2011.