An application server system includes a main server and one or more clients controlled by the main server. The base die includes conductive vias which form an internal signal transmission system for the component, and allow the circuit side of the secondary die to be bonded to the back side of the base die. In preferred embodiments, the target analyte is glucose, glucagons, or insulin. The cantilever is arranged in a region extending along the first casing element from the first end; and having a pivot axis at a mid portion thereof. A radiation pattern from the variable directivity antenna apparatus is changed by outputting a control signal for changing over whether or not the parasitic element operates as a parasitic element by selectively turning on or off the PIN diode. Electromechanically actuated locking elements are provided for locking the leaf into the blind frame.