IIAI AAI 2021-Winter: Editor's Preface

This volume contains the papers presented at IIAI AAI 2021-Winter Congress: 11th International Congress on Advanced Applied Informatics (IIAI AAI 2021-Winter) held on December 17-19, 2021 in Jakarta, Indonesia and Online (managed at Tokyo, Japan). The Congress was sponsored by the International Institute of Applied Informatics, Japan. The purpose of IIAI AAI 2021-Winter is to bring together researchers and practitioners from academia, industry, and government to exchange their research ideas and results and to discuss the state of the art in the areas of the conference. Four sub-conferences, the 13th International Conference on e-Services and Knowledge Management (ESKM), the 11th International Conference on Learning Technologies and Learning Environments (LTLE), the 11th International Conference on Data Science and Institutional Research (DSIR), and the 10th International Conference on Smart Computing and Artificial Intelligence (SCAI) are held with the AAI 2021-Winter Congress.

We would like to thank the organizing chairs, the organization staff, the members of the Program Committee and Easychair staffs for their hard work. And most importantly, we would like to thank all the authors for sharing their ideas and experiences through their outstanding papers contributed to the congress.