Climate Change and Global Warming

· Global Warming – numbers please! is my effort to make some sense of the global warming debate using the IPCC report and counterpoints.

Nonproliferation policy and detection systems for countering terrorism,

• Reliable Detection Portal (slides, paper)
• Presented at Stanford University Center for International Security and Cooperation (CISAC) on January 30, 2008 (“Reliably Detecting Nuclear Weapons in Transit”)
• Nuclear Detection: History & Facts (paper)
• Nuclear Detection: Portals, fixed detectors, and NEST teams won’t work for shielded HEU on a national scale, so what next?
• published as Devabhaktuni Srikrishna, A. Narasimha Chari and Thomas Tisch, “DETERRENCE OF NUCLEAR TERRORISM WITH MOBILE RADIATION DETECTORS” (Nonproliferation Review, Vol. 12, No 3, November 2005, pages 573-614) http://cns.miis.edu/pubs/npr/vol12/123toc.htm
• Could a citywide network of sensors prevent terrorist use of bombs? (full version)
• Nonlinear Deterrence: Why Sensors Would Work In Preventing Terrorism (shorter version)
• A blog, www.sensornetnews.com “The application of sensors and sensor-systems to countering terrorism”

Why do engineers build systems that fail sometimes, and how do we prevent that from happening?

• System Understanding, observations on how to build systems that work by studying why large systems had expensive bugs