Here is a listing of the individual research groups that are part of CS 793 this semester.

Algorithmic Biology and Robotics Laboratory
This semester the Algorithmic Biology and Robotics group headed by Hamidreza Chitsaz is meeting Monday from 1:00 to 2:00 in CSB 452.
Big Data
The Big Data Lab, headed by Sangmi Lee Pallickara is meeting from 1:00 to 1:50 every Friday.
See the Big Data Lab: Whiteboard for details including meeting locations.
Deep Learning
This semester there is a special joint group reviewing recent advancements in Deep Learning. Chuck Anderson is leading with the assistance of Bruce Draper and Asa Ben-Hur. The meetings are Tuesday from 1:00 to 2:00 in CSB 305.
Here is the Deep Learning CS793 website.
The Mélange group, led by Sanjay Rajopadhye and Louis-Noël Pouchet meets Wednesdays from 10 to 11 in CSB 305.
See the Spring 2017 Schedule for additional details.
Security and Privacy
This semester Indrakshi Ray and Indrajit Ray are leading a weekly seminar on Security and Privacy. The group meets Wednesdays from 2:30 to 3:30 in CSB 425.
Security in Current and Future Internet Architectures
This semester Christos Papadopoulos is leading a weekly seminar on Security in Internet Architectures. The group meets Fridays from 3:00 to 4:00 in CSB 315.
Software Engineering
The SE group is meeting from Noon to 1:00 on Mondays. The group is led by Sudipto Ghosh, Laura Moreno, and Jim Bieman.
Here is the Software Engineering Wiki.

When thinking about Department Seminars, also track CS 692 (BMAC) - The CS Colloquium.