A controllable magnetorheological damper having first, second and third portions is disclosed. A set of characteristic of a compilation environment is measured during compilation of a code segment. The junction structure is formed such that two different semiconductor films and are joined together. A further embodiment includes a container with a wall and a movable door, and an antenna in a recess of the wall near the top of the container. Each float may also include a retractable wheel and landing gear, wherein the wheel is preferably positioned on the line that is at least 5 degrees rearward of a vertical line passing through a most aft empty weight center of gravity. The electrical contact may be formed entirely of one or more of such alloys; or may be formed of an inexpensive substrate base metal, such as steel, having one or more of the alloys coated thereupon; or may be formed of a mixture of the base metal and the alloy.