Colloquium and Sigma Series Lectures The Colloquium and Sigma Series Lectures have moved to colloqsigma.larc.nasa.gov. Please update your bookmarks and links to point to that site. This site will continue to function for several months, but it will not be updated. Here are direct links to the new site for upcoming Colloqiuium Lectures and upcoming Sigma Series lectures.
	Purpose The Colloquium Lectures at NASA Langley provide monthly lectures and demonstrations related to science and technology. These lectures stimulate the creative processes of Langley employees, and enhance the quality of life at Langley by providing more opportunities for learning. These lectures are open to NASA employees, NASA contractors, and other invited guests. The Researcher News Online has a recent article about the history of the Colloquium and Sigma Series Lectures: November 17, 2006 And attached here is the link to the page from 1971 of the Researcher News in which the Colloquium Series was first announced to the Center. The Sigma Series Lectures, presented at the Virginia Air and Space Center in downtown Hampton, provide to the general public this same opportunity for exposure to interesting technical topics. These lectures, however, are usually at a somewhat less detailed level, because the audience may consist of people with non-technical backgrounds in addition to local high school and college students. The guests and topics for both the Colloquium and Sigma Series Lectures are selected by a committee of NASA Langley employees representing the different technical organizations at the Center. If you have a suggestion for a future lecture topic, please send your suggestion to Michael Holloway (c.m.holloway@nasa.gov).
	Upcoming Lectures (In Chronological Order) Colloquium Lectures April 2, 2013, 2:00 p.m.: To Mars in Weeks by Thermonuclear Micro-Bomb Propulsion by Friedwardt Winterberg May 7, 2013, 2:00 p.m.: TBD by Michael Mann June 4, 2013, 2:00 p.m.: TBD by Joe Chambers July 9, 2013, 2:00 p.m.: TBD by TBD August 6, 2013, 2:00 p.m.: TBD by TBD Sigma Series Lectures April 2, 2013, 7:30 p.m.: Cheating the Death of the Sun by Relativistic Interstellar Spaceflight by Friedwardt Winterberg May 7, 2013, 7:30 p.m.: Michael Mann June 4, 2013, 7:30 p.m.: Joe Chambers
	Recent Past Lectures (In Reverse Month Chronological Order) Colloquium Lectures March 5, 2013: The Science Behind the Taming of the Deepwater Horizon Oil Spill by Paul Hsieh February 5, 2013: Proton Radiotherapy Systems and Clinical Practice by Cornel Butuceanu January 8, 2013: Too Big to Know by David Weinberger December 4, 2012: Designs of Expandable Structures by Chuck Hoberman November 6, 2012: CCAM: A Game Changing Advanced Manufacturing Research Model by David R. Lohr October 2, 2012: Truth, Lies, and O-rings: Inside the Space Shuttle Challenger Disaster by Allan J. McDonald September 11, 2012: Aeronautical Entrepreneuring with UAVs by Steven M. Sliwa Sigma Series Lectures March 5, 2013: The Science Behind the Taming of the Deepwater Horizon Oil Spill by Paul Hsieh February 5, 2013: Hampton University Proton Therapy Institute: Fighting Cancer, Saving Lives by Keith Gregory January 8, 2013: Too Big to Know by David Weinberger December 4, 2012: Designs of Expandable Structures by Chuck Hoberman November 6, 2012: CCAM: A Game Changing Advanced Manufacturing Research Model by David R. Lohr October 2, 2012: Truth, Lies, and O-rings: Inside the Space Shuttle Challenger Disaster by Allan J. McDonald September 11, 2012: Aeronautical Entrepreneuring with UAVs by Steven M. Sliwa
	Viewing Past Lectures DVD recordings are currently made of all Colloquium Lectures, and many of the past lectures were also recorded (VHS, Beta, or audio cassette). These recordings can be borrowed, by employees and contractors of NASA Langley Research Center only, from Langley's Technical Library (x42389). A list of past colloquium lectures is available to help you select which lectures you'd like to catch up on. Note that these lectures are copyrighted and may not be copied, distributed, or used for any purpose other than personal viewing.
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