February 2015. What one likes, one will do well. November 2009 Politics and Mathematics July 2009 The great eclipse of the century June 2009 My iPhone May 2009 Internet 2010 issues April 2009 Solving the Monty Hall problem with a decision tree March 2009 Front and back August 2008 Success Tips May 2008 Trip to Hokkaido and miscellaneous impressions on Ainu people April 2008 On prime numbers in March 2008 February 2008 Blast Furnace Stee-makingl, Tatara furnace iron-making, and Princess Mononoke January 2008 About the leap year December 2007 More options for your career! November 2007 Thanksgiving October 2007 Informatics on Railways September 2007 Travel to Sarajevo August 2007 Project on Cheju Island, South Korea July 2007 Asteroid Hieizan June 2007 Roundabout May 2007 - A Report on the ADB 40th Annual Meeting in Kyoto April 2007 - A gift for new students-Expected IT professionals- March 2007 Inauguration Ceremony of Columbia University Teachers College President February 2007 Current Situation of the Information Curriculum Model January 2007 Windows Vista