Methods and apparatus for providing suggested completions to search results are disclosed which employ locating nodes in a stored ontology, wherein nodes consist of classes or instances of information, that correspond to the at least one search term, retrieving neighbors of located nodes in the stored ontology, and generating suggested completions in a format which separates homonymic terms. The piston is composed of an upper piston that includes the protrusion and a lower piston that includes the holdingfastening part. Further, in the system, when a vehicle moves from a GPS reception area to a non-reception area and a GPSDR system mode changes into a DR system mode, an initial velocity value can be estimated while a time delay is considered for a DR system. The dielectric member has a shape in cross section in a direction approximately perpendicular to a transmitting direction of the microwaves through the dielectric member that allows transmission of the microwaves of substantially a single mode.