Steffen Foss Hansen is a Ph.D. candidate at the Technical University of Denmark’s Department of Environmental Engineering.    Here is a link to his well-written Ph.D. thesis — "Regulation and Risk Assessment of Nanomaterials — Too Little, Too Late?" 

Dr. Hansen’s thesis investigates whether existing environmental, health, and safety regulations and risk assessment techniques are adequate for nanotechnology and provides "some recommendations on how to govern nanotechnologies."   While I don’t always agree with Dr. Hansen on nano-related EHS issues, there is no doubt that his work is detailed, thorough, and thought provoking.  Read it.  :)

As an aside, I also had the pleasure of contributing with Dr. Hansen and others on a nanogovernance book chapter this past year which might be of interest to Nanolawreport readers:

Considerations for Implementation of Manufactured Nanomaterial Policy and Governance, NANOMATERIALS RISKS AND BENEFITS, NATO Science for Peace and Security Series C: Environmental Security, (Igor Linkov and Jeffery Steevens eds., Springer 2008).