—In computational studies of the body mass and surface area of vertebrates, it is customary to assume that body cross-sections are approximately elliptical. However, a review of actual vertebrate cross-sections establishes that this assumption is not usually met. A new cross-sectional model using superellipses is therefore introduced, together with a scheme that allows estimates to be given wit...

The energy dependence of a given process teaches us about the dynamics of this process. If the energy dependence can be described by a Reggetype approach a la Donnachie and Landshoff [1] we call the process soft. The total hadron-proton cross sections dependence on center-of-mass energy exemplifies the behaviour of soft processes.. If the energy dependence can be described by perturbative QCD (...