A lift apparatus has a frame with open sides and a web assembly slidably retained along the sides which extends from one end of the frame to the other. In one embodiment, methods, systems and computer software are provided for comparative gene expression analysis using intensity dependent normalization factors. Methods for representing taste perception of a particular tastant in a mammal are also described, as are methods for generating a novel molecules or combinations of molecules that elicit a predetermined taste perception in a mammal, and methods for simulating one or more tastes. Each of the one or more secondary conductors has a first end coupled to the ground conductor near an area of higher current densities which forms when the primary conductor is receiving or radiating electromagnetic energy at one of the first set of predetermined frequencies.