 The rest of the Executive Committee, that is, the past-president, the vice-presidents (with the president of the following congress acting as an additional vice-president) and the members-at-large, aid in the decision-making process.The scientific work of the IUAES is carried out by its Commissions, which focus on particular topics of specialized interest.The IUAES Commissions, of which more than thirty are currently recognized, (Nas and Zhang 2009