What's New?
.	June Journal
.	Nominations for National Student Science Awards
.	Thomadsen Chair of ACMUI
.	New Member Welcome Packet
.	Homeland Security News
.	May Newsletter
.	Maher Appointed to NAS Committee
.	NRC Comment Period on Rulemaking
.	Affiliate of American Institute of Physics
.	Online Registration for Annual Meeting
.	Radiation Research Society Meeting

Upcoming Events
.	NRC Meeting Webcasts - Live Ongoing
.	IRPA Regional Congress 15-19 April 2013 Rio de Janeiro, Brazil
.	50th Annual SRP Conference Radiation Protection - Spectres from the Past, Visions of the Future 21-23 May 2013 HIC Harrogate, UK
.	Canadian Radiation Protection Association (CRPA) Annual Conference 26-30 May 2013 Sherbrooke, Quebec, Canada
.	58th Annual HPS Meeting 7-11 July 2013 Madison, WI
.	RITN Workshop Mitigation and Treatment of Radiation Damage 31 Jul - 2 Aug 2012 Baltimore MD
.	Radiation Research Society Meeting 15-19 Sept 2013 New Orleans, LA
.	2013 International Radon Symposium 22-25 Sept 2013 Springfield, IL

19 May 2013

Collective dose

The sum of the individual doses received in a given time period by a specified population from exposure to a specified source of radiation.