In a starter, an output shaft is supported by a main tube body according to a direct contacting structure that outer surfaces other than a male helical spline and inner surfaces other than a female helical spline of a pinion tube contact directly. The wave energy converters have a buoy having an interior guide, motion of the buoy representing a first degree of freedom and a spar mounted within the interior guide so as to be movable therein, motion of the spar representing a second degree of freedom. Methods of treating inflammatory conditions of the GI tract such as inflammatory bowel disease using compounds having the following formula are also disclosed:where R9, R10 and R11 are independently selected from the group consisting of hydrogen and C1 to C4 alkyl, and R12 is selected from the group consisting of hydrogen and \u2014CR13, where R13 is a C1 to C6 alkyl or an aryl group. The virtual equipment model governs how the virtual equipment behaves in response to user interaction with the representation.