Example ionic coupling electrodes are described. Through minimizing the use of multiple banks of memory andor multi-ported memory blocks to reduce implementation cost, vector memory 450 provides abundant memory bandwidth and enables sustained low-delay memory operations for a large number of SIMD or vector operators simultaneously. Further in the lock sensing mode, one or more end effectors of the robotic surgical instrument are switchably clamped together in the robotic surgical instrument. The side walls are provided with vascularization openings, and the body wall device includes opposite bone ingrowth slots extending through the interrupted thread portion of the body. Modifications to the algorithms can be made to accommodate sound sources located to the sides as well as the front of the listener.