A passage for the sealed andor sterile passage of a functional element, for example a rod andor wave-like functional element through at least one wall separating a sterile chamber from an non-sterile chamber, comprising at least one hydraulic seal enabling a relative movement of the functional element in relation to the at least one wall. The isolation mechanism of the embedded memory portion is improved relative to other portions of the device by increasing dopant concentrations or reducing the depth of the dopant profiles within well regions of the embedded memory array. In a second embodiment, distinct winding regions associated with the separate yoke regions are interconnected in series to make a single effective winding. Other methods and systems are also described and illustrated. The first and second water barrier walls help prevent external water from eroding the primary light source unit and the position light unit, and the adjustment mechanism facilitates adjustment of elevation angle of the headlight.