A cathode active material for a metal-sulfur battery is provided. The wall portion includes a base portion extending from the first portion and an angled portion extending from the base portion at an angle with respect to the base portion. The second spring element transmits its intrinsic tension in the tangential and radial directions either to a bearing point on the final control element or to a second bearing point of the housing and is adjustable in its angular position by means of an adjustable stop. Each subgrating is a set of equally spaced virtual lines of the GPG that supports a common layout shape run length thereon. The marine devices employ a mechanical energy conversion system that harnesses wave energy and converts it into limited motion that is suitable for input to an electrical energy generator. A phase shall represent a percentage of a period of a repeating cycle.