Bac Nguyen Trong from the Thai Nguyen University of Economics and Business Administration, Song Cong City, Vietnam has spent a research period at the Kent State University, USA between 2017-11-08 - 2018-01-08. His collaborator was Professor Hai Dinh.
A short report can be found here.
Grigori Karagulyan from the Institute of Mathematics, Armenian National Academy of Sciences, Yerevan, Armenia has spent a research period at the Georgia Institute of Technology, Atlanta, USA between 2017-09-20 - 2017-10-20. His collaborator was Professor Michael Lacey.