A shower arrangement designated to be affixed to a showering area comprises an arced hollow section inside of which is a water line to a head nozzle at the top area of the arc. A controller is configured to receive a first signal from the PCD at a first antenna in a driver zone and to generate a first signal strength value for the first signal. The invention also relates to methods of production of highly unsaturated fatty acids by marine organisms at low pH levels, and includes methods for generation of low pH tolerant strains. A pivot member is attached to the first peripheral wall and second peripheral wall for pivotally coupling the upper portion to the bottom portion. in accordance with DIN 52612, of less than 32 mWm*K, and also a process for producing them. An optical function device using the stacked material is also provided.