- 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