All participants are encouraged to submit posters to present their own research during the Institute. Topics for the poster session are not limited to the current year theme of the Institute. Tuesday and Thursday afternoons during the two weeks are tentatively allocated for online poster sessions. Each accepted abstract will be assigned to one of these sessions. The sessions consist of a set of open parallel poster displays with each author hosting a virtual room to talk to visiting participants. Authors are encouraged to submit a 2min talk video that will be compiled together as an online guide to help participants to select virtual rooms to join. Poster session setup is still in preparation. Please check SSI2021 web page announcements for updates.