2022.12 EPA Workshop in Yeosu
2022 group photo
2022 Korean Society of PhotoScience
2022 Teacher's Day
W. choi's 2020 Doosan Yonkang Environment Award
2020 EPA dinner
2019.12. EPA Workshop group photo-1
3rd Seminar of the NSFC-NRF Major International Joint Research Project-3
3rd Seminar of the NSFC-NRF Major International Joint Research Project-2
3rd Seminar of the NSFC-NRF Major International Joint Research Project-1
EPA Homecoming day for W. choi's 20th anniversary
W. choi's 20th anniversary
ICP 2015 conference
EPA summer retreat