Oral Presentation:


The 8th SEAMS-UGM 2019 International Conference on Mathematics and Its Applications: Deepening Mathematical Concepts for Wider Application through Multidisciplinary Research and Industries Collaborations. Dual Hesitant N-Soft Sets, Universitas Gadjah Mada, Yogyakarta, 29 Juli sampai 1 Agustus 2019

International Congress on Industrial and Applied Mathematics. The Multi-Fuzzy N-Soft Set and Its Operations, Valencia, Spanyol, 15-19 Juli, 2019


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


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


Seminar 1st International Conference on Open and Distance e-Learning (1ICODEL), Implementation of Online Tutorial at Universitas Terbuka, Manila, Pilipina, 22-24 Februari 2012


Seminar Internasional Asian Association of Open Universities (AAOU), The Improvement of Academic Quality at Universitas Terbuka, Indonesia, Penang, Malaysia, 26 September–1 Oktober 2011

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