Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
J. K. Aggarwal, M. S. Ryoo. Human activity analysis: A review. ACM Computing Surveys, 43(3):16, 2011. [doi]