- The Eighth Annual Writers Conference at the University of Pennsylvania brings writers together from throughout the region to explore topics and techniques in many fields of writing. The keynote speaker for the Nov. 9 conference is Ken Kalfus, author of the short story collections “Thirst” and “Pu-239 and Other Russian Fantasies.” Fee $150. Info/registration: www.upenn.edu/writconf or Nadia Daniel, 215-898-6479.

- “Terrorism and Bio-terrorism: Nursing’s Response” is the subject of a day-long symposium from 8 a.m. to 4 p.m. Nov. 1 at the School of Nursing, 420 Guardian Drive. Nursing faculty experts will discuss the health threats posed by terrorist acts, including biological agents and mental health disorders, and strategies for dealing with terrorist attacks and their aftermath. Fee $139. Info/registration: www.nursing.upenn.edu/ce/programs/Fall2002/terrorism.htm.

- The Center for Neurodegenerative Disease Research will hold its third annual retreat on Wednesday, Nov. 13 at the Biomedical Research Building II/III Auditorium, 421 Curie Blvd. Susan Lindquist of MIT delivers this year’s keynote speech, entitled “Prions: One Surprise After Another.” Info and registration: www.uphs.upenn.edu/cndr/ or 215-662-4708/4474.