Youngjin Yoo @youngjin-yoo Active 9 years, 1 month ago ActivityProfileSites 2Friends 2Groups 0 PersonalMentionsFavoritesFriendsGroups Show: — Everything — Updates New Sites Posts Comments Friendships New Groups Group Memberships Group Updates Sorry, there was no activity found. Please try a different filter. CourseDepartmentFaculty/Staff portfolioProjectStudent portfolio