• 1997, Ohio State University, Columbus, OH, USA;
  • 1998, Santa Clara, CA, USA;
  • 1999, Taipei, Taiwan;
  • 2000, Stockholm, Sweden;
  • 2001, Bangkok, Thailand;
  • 2002, Singapore;
  • 2003, Macao;
  • 2004 Macao;
  • 2005, Bordeaux, France;
  • 2006, Hangzhou, China;
  • 2007, Limerick, Ireland;
  • 2008, Istanbul, Turkey;
  • 2009, Thailand;
  • 2010, Pavia, Italy;
  • 2011, Bali, Indonesia;
  • 2012, Valencia, Spain;
  • 2013, Montreal, Canada;
  • 2014, Ho Chi Minh City, Vietnam;
  • 2016, Boston, USA on;
  • 2018, Chiang Mai, Thailand;
  • 2019, Yilan, Taiwan;
  • 2021, Bordeaux, France;
  • 2022, Hiroshima, Japan