FUZZYSS'2011: 2nd International Fuzzy Systems Symposium 17-18 November 2011, Ankara, Turkey

Welcome to the Journal of Intelligent and Fuzzy Systems’s special issue for “FUZZYSS’2011: 2nd International Fuzzy Systems Symposium”. Since its introduction by Prof. Dr. Lotfi A. Zadeh fuzzy logic, fuzzy sets and systems have been applied to various problems in many diverse areas. As everything try to evolve towards better states, the fuzzy theory and its applications are also evolving to model and solve more complicated problems. However, as noted by many experts, it may not be straightforward to differentiate between problems that really require a crisp or fuzzy modeling and solution approach. In fact, the boundary between them may also be uncertain. What sort of problems really requires fuzzy modeling and solution? What is “fuzziness” in them? Without appropriately answering these basic questions, application of fuzzy logic may not be very helpful. As noted by Prof. Zadeh; “Fuzziness describes the ambiguity of an event, whereas randomness describes the uncertainty in the occurrence of the event ”. Therefore, it is very important to clearly explore the type of uncertainly in any application before proving a model and/or solution to it.