Patterns in Time (PDF), Foundations and Frontiers of Complex Systems, First Latin American Complex Systems Summer School, San Carlos de Bariloche, Argentina, 5 December 2008.

Structure or Noise? (PDF), Dynamics Days 2008 5 January 2008, Knoxville, Tennessee.

Reconstruction Deconstruction: A Brief History of Building Models of Nonlinear Dynamical Systems (PDF), Neural Information Processing Systems (NIPS) 2006, Workshop on Revealing Hidden Elements of Dynamical Systems, 8 December 2006, Whistler, British Columbia.

Objects that Make Objects: The Population Dynamics of Structural Complexity (Breeze stream), Science of Complex Systems Seminar, Center for Computational Science and Engineering, UC Davis, 11 January 2006.

Multiagent Dynamical Systems: Slides (PDF), Video (RealPlayer) (Windows Media Player), Announcement (PDF), Seminar Series in Complex Systems—Between Nature and Science: Advanced Modeling Concepts for Environmental Sciences, Environmental Sciences Department, UC Davis, 2 June 2005.

Natural Computation (PDF), Nanotechnology, Biotechnology, Information Technology, and Cognitive Science (NBIC Convergence 2004), New York City, 25 February 2004.

Complex Systems Theory? (PDF), Santa Fe Institute Retreat, Bishop's Lodge, Santa Fe, 25 October 2003.

Dynamical Embodiments of Computation in Cognitive Processes (PDF), DARPA Information Processing Technologies Office Director Briefing, Santa Fe Institute, 22 October 2003.

Terrorizing Complex Systems (PDF), Business Network Topical Meeting on Modeling Terrorism as a Complex Adaptive System, Santa Fe Institute, 10 April 2003.