MEETING-DATE:April 5, 2012 MEETING-LOCATION:DC 1331 MEETING-TIME:11:30 MEETING-CHAIR:Simon Parent MEETING-CHAIRPIC:Simon.png COFFEE-HOUR-LAST-WEEK:Phil COFFEE-HOUR-THIS-WEEK:Easter Bunny COFFEE-HOUR-NEXT-WEEK:Grace FORTH-DATE1:April 12, 2012 FORTH-DATE2:April 19, 2012 FORTH-DATE3:April 26, 2012 FORTH-DATE4:May 3, 2012 FORTH-LOCATION1:DC 1331 11:30 FORTH-LOCATION2:DC 1331 11:30 FORTH-LOCATION3:DC 1331 11:30 FORTH-LOCATION4:DC 1331 11:30 FORTH-CHAIR1:Alex Pytel FORTH-CHAIR2:Matthew Thorne FORTH-CHAIR3:Grace Yao FORTH-CHAIR4:Zainab AlMeraj FORTH-CHAIRPIC1:alex.png FORTH-CHAIRPIC2:thorne.jpg FORTH-CHAIRPIC3:grace.jpg FORTH-CHAIRPIC4:zainab.jpg FORTH-TP1:Lesley Northam FORTH-TP2:Simon Parent FORTH-TP3:Alex Pytel FORTH-TP4:Matthew Thorne FORTH-TPPIC1:LNortham.png FORTH-TPPIC2:Simon.png FORTH-TPPIC3:alex.png FORTH-TPPIC4:thorne.jpg TPNAME:Stephen Mann TPTITLE:Perspective Projection in a Conformal Model TPABSTRACT:I will review a method of Goldman to represent perspectiveprojection as a versor in the conformal model of geometric algebra. This is asomewhat counter-intuitive result, since perspective projections do nopreserve angles and are thus non-conformal. Goldman's technique startswith a view direction and distance to the viewing plane, from which heconstructs (with heavy use of trig functions) the eye point and projectionplane, as well as the versor used for the perspective projection. I thengive some geometric intuition about Goldman's approach, and present asimplified variant that starts with the eye point and view direction,and constructs a versor for perspective projection without using trigfunctions. TPPIC:smann.jpg DIONE: DITWO: DITHREE: DIFOUR: AIONE:Discuss Curtis' performance on Top Chef Canada.

Curtis AITWO:Advance? Retreat? AITHREE:Fix the conference script, or just delete this item again. AIFOUR: DMONE: DMTWO: DMTHREE: DMFOUR: SEMINARS:

Wednesday, 4 April 2012, 10:30AM  Computer Science, DC 1304  Christopher Batty  Simulating Liquids for Computer Graphics and Visual Effects Thursday, 5 April 2012, 3:30PM  Pure Mathematics (Number Theory Seminar), MC 5136B  Jennifer Park  Hilbert's tenth problem over number fieldsMonday, 9 April 2012, 9:30AM  Computer Science (Database Research Group), DC 1331  Patrick Kling  Distributed XML Query Processing Tuesday, 10 April 2012, 9:30AM  Computer Science (Artificial Intelligence Lab), DC 2306C(AI Lab)  John Finnson  Modeling trust in multiagent mobile vehicular ad-hoc networks through  enhanced knowledge exchange for effective travel decision making Wednesday, 11 April 2012, 9:00AM  Computer Science (Information Retrieval Group), DC 2310  Mona Mojdeh  Personal Email Spam Filtering with Minimal User Interaction Monday, 16 April 2012, 12:30PM  Institute for Quantum Computing, RAC1 2009  David Kaiser  How the Hippies Saved Physics