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Seminar: Spring 2003

Seminars are held on Tuesdays, 3:45-4:45pm in SB 101, unless otherwise noted. Meet at 3:30 in SB 157 for refreshments (refreshments are available even on Tuesdays with no seminar!). See Calvin's Visitor Resources for maps and directions to the Science Building.

Schedules from previous semesters: Fall 2002, Spring 2002, Fall 2001, Spring 2001, Fall 2000, Spring 2000, Fall 1999.

Date Title Speaker
Friday, February 14, SB110 Scitex Inkjet: It's Not a Typical Desktop Printer Dr. James Katerburg '75, senior scientist at Scitex
Friday, March 7, SB110 Creation or Curse? Entropy Earthquakes, Mosquitoes & Malaria Prof. Loren Haarsma
Thursday, April 3, SB010 Observations of Cold Antihydrogen: Atoms made entirely of Antimatter Dr. Jerry Gabrielse '73, Professor and Physics Dept. Chair, Harvard University
April 15 A Static, Visual, and Quantitative Demonstration of Newton's Third Law Prof. David Van Baak
Monday, April 21 The Science of Global Warming and the Status of the United States Policy on Climate Change Dr. Tom Ackerman
May 13 SGRs: The Acronym, the Object, and Some Observations of SGR 1900+14 Prof. Geoff Lenters

February 14: Scitex Inkjet: It's Not a Typical Desktop Printer
Scitex Inkjet printers operate at speeds up to 2000 pages/minute. Scitex printheads involve a broad range of applied physics and engineering disciplines such as fluid dynamics, vibration analysis, and electrostatics. An overview of the operating principles at the heart of these high-speed printers will be presented.

March 7: Creation or Curse? Entropy Earthquakes, Mosquitoes & Malaria
In Reformed theology, the effects of the Fall are pervasive, affecting all of creation. So it is tempting for us to blame everything which annoys or hurts us on the Fall. When we study creation scientifically, however, we find that many of the things which can annoy or hurt us -- from tiny viruses to the second law of thermodynamics -- play an important, natural, and perhaps even inevitable part in the functioning of God's complex and amazing creation. We shouldn't be hasty to blame something on the Fall which was part of God's good design. We'll explore this topic in a range of areas from the laws of physics to biology to human behavioral dispositions.

April 3: Observations of Cold Antihydrogen: Atoms made entirely of antimatter
Antihydrogen atoms are the simplest atoms made entirely of antimatter. An anti-electron (more often called a positron) orbits an antiproton. Precise comparisons of hydrogen and antihydrogen atoms promise to provide exceptionally sensitive tests of the fundamental symmetries of nature. Cold antihydrogen atoms were observed for the first time last fall, and Professor Gabrielse will report on his work with the ATRAP collaboration which provided a background-free observation of cold antihydrogen, and a first look at its internal states.