[IEEE 2012 Joint 6th Intl. Conference on Soft Computing and Intelligent Systems (SCIS) and 13th Intl. Symposium on Advanced Intelligent Systems (ISIS) - Kobe, Japan (2012.11.20-2012.11.24)] The 6th International Conference on Soft Computing and Intelligent Systems, and The 13th International Symposium on Advanced Intelligence Systems - Comparison on membership functions in fuzzy k-member clustering for data anonymization