A clock distribution network is formed on a semiconductor interposer which is a semiconductor integrated circuit. Loss of cells during washing steps is significantly curtailed through the use of the cell-culture-compatible filter plates, and the high endogenous fluorescence backgrounds characteristic of cell-based assays is avoided by use of time-resolved fluorescence. The apparatus comprises a display configured to display a profile view frame and a specially configured processor coupled to the display. A joint rotatably couples the rotor to the body, and a ratchet device is operably coupled to the rotor to allow the rotor to rotate in a first direction and at least restrict the rotor arm from rotating in a second direction opposite the first.