Assemblies of granular particles mechanically stable under their own weight contain arches. These are structural units identified as sets of mutually stable grains. It is generally assumed that these arches shield the weight above them and should bear most of the stress in the system. We test such hypothesis by studying the stress born by in-arch and out-of-arch grains. We show that, indeed, pa...

Abstract In this paper, the dynamical similarity of multi-block catenary arches and columns is discussed, which can be used for simplified design rocking arches. The basic hypothesis that dynamic response similar when shape arch follows thrust line, i.e. it a arch. It validated numerically responses slender are safe reliable approximations those not then overturning acceleration (response) spec...

the osteology of the hyoid and branchial arches in several representatives of eurypterygian fishes were examined. the hyoid arches consist of a single basihyal and urohyal, and the arch on each side consists of a dorsal and a ventral hypohyal, an anterior and posterior ceratohyal, an interhyal, and branchiostegal rays that are borne on the ceratohyals. the branchial arches consist of three sing...