Professor George Xu has been invited by Administrator Lisa Jackson of US Environmental Protection Agency to serve as a member of EPA's Science Advisory Board (SAB) Radiation Advisory Committee. The Radiation Advisory Committee is organized under the Federal Advisory Committee Act. Committee member's scientific and technical expertise, experience and innovation play critical roles in the success of the EPA's approach to effective environmental protection. http://yosemite.epa.gov/sab/sabpeople.nsf/WebCommittees/BOARD