Various embodiments of the present invention relate to glass fiber forming bushings, to methods of controlling the temperature of bushings having multiple segments, to systems of controlling the temperature of bushings having multiple segments, and to other systems and methods. a percentage by weight based on the oxides:ZrO2+Hf2O: >85%;SiO2: 6% to 12%;Al2O3: 0. The display may be used, as an example, in a motor vehicle to prevent unwanted reflections from the windscreen of the vehicle. The detector array signals are fed into a multilayer processing module wherein each layer includes detector signal processing circuitry.