Advances in Decision Analysis formatIsbn:Softcover 9789048151677 A lighter than air robot O.P A lighter than air robot is an aerial robot that relies on the static lift to balance its own weight The range of non homogeneous materials was limited to those that are inhomogeneous at the macroscopic level and or exhibit strain softening This explains why some papers differ significantly from the original presentation The contribution of Bouyssou and Pirlot concerns the reformulation of classical conjoint measurement models that induce a complete and transitive preference binary relation on the set of alternatives which seem to be unrealistic when decision makers are asked to compare objects evaluated on several attributes