An apparatus, system and method for the radiometric calibration of an optical payload consisting of a housing with an optical aperture, at one portion. For example, in certain aspects methods including screening of optimal differentiation conditions for a selected stem cell clone in a selected batch of culture medium and use of the determined optimal condition for differentiation into a specific cell lineage. The operation section lets the user input instructions for operating the portable cellular phone. The hoist assembly includes a first motor coupled to a first linearly moving pulley by a first linkage. The integrated assembly further includes a connector coupled proximate a first end to the latch bolt and operably coupled proximate a second end to the rotor.