Fretted and chaotic terrains are members of a larger family of lowland terrains on the Martian surface. They have formed in equatorial and midnorthern latitudes, within areas reasonably proximate to the extensive volcanic fields of that region. Both are relatively recent developments. Fretted terrain is characterized by extensive, smooth, lowland plains separated from the old cratered upland by...

Walking animals, like stick insects, cockroaches or ants, demonstrate a fascinating range of locomotive abilities and complex behaviors. The locomotive behaviors can consist of a variety of walking patterns along with adaptation that allow the animals to deal with changes in environmental conditions, like uneven terrains, gaps, obstacles etc. Biological study has revealed that such complex beha...

Simulators are a unique way of replicating any real world scenario. It gives one the opportunity to be in a place virtually without being present there physically. The motivation behind making this simulator was to replicate real world terrains and make a human walk in that environment. The basic application which acted as motivation was training people like soldiers, sportspersons and others o...

Triangulated surfaces are often used to represent terrains in geographic information systems. We investigate the complexity of river networks and watershed maps on such terrains under the assumption that water always follows the path of steepest descent. We show that the worst-case complexity is only Θ(n) if all triangles are non-obtuse or if all triangles are fat, that is, their minimum angles...