Abstract: Provided herein is a method for processing a tissue sample. The method may comprise: (a) permeating the tissue section with monomers for a negatively charged expandible gel, (b) allowing the monomers to polymerize in the tissue sample, (c) hydrating the tissue sample, thereby causing the sample to expand, (d) adhering expanded tissue sample to a positively charged surface and (e) dehydrating the expanded tissue sample while it is on the planar surface.

Abstract: A method for hand gesture based human-machine interaction with an automobile may comprise: automatically starting a first mode of control of the automobile, wherein the first mode is associated with a first set of hand gestures, each hand gesture corresponding to a command for controlling the automobile; determining whether a trigger event has been detected; and in response to determining that the trigger event has been detected, performing control of the automobile in a second mode, wherein the second mode is associated with a second set of hand gestures, each hand gesture corresponding to a command for controlling the automobile, and wherein the first set of hand gestures and the corresponding commands are a subset of the second set of hand gestures and the corresponding commands.