An embodiment takes the form of a computer-implemented method comprising causing a field-sequential color display of a wearable computing device to initially operate in a first color space; and based at least in part on data from one or more sensors of the wearable computing device, detecting movement of the wearable computing device that is characteristic of color breakup perception. A ramp-up capacitor is connected to the auxiliary current source input. A method for removing NOx and SOx impurities from exhaust gases using the integrated lean NOx trap is also described. Alternatively, the BER and the data rate of the transmission system are determined. The screen may protect the hollow fiber membranes from damage from coarse contaminants contained in the feed liquid, may improve module integrity, and may improve the efficiency of the filtration system.