Proposals are invited for special sessions on any topic relevant to the conference. Special sessions are intended to stimulate in-depth discussions in special areas and they are fully integrated into the main conference. The research papers and the informal presentations submitted and accepted for the special sessions follow the same rules as the papers submitted to the regular sessions. It is expected that the organizers of the special sessions appoint their own chair and program committee, which will be integrated in the conference program committee and will be supervised by the conference program chair and by the general chair.