The fragment processing pipeline 10 of a graphics processing core 2 has an associated occlusion query cache 19 that is used to maintain a set of local occlusion counters 21. Water is converted into a high-pressure liquid through the compression device, and then is converted into a high-speed fluid by controlling the cross-sectional area of a spout of the decompression device, thus generating physical effects such as pressure drop and shear stress, so as to damage cell walls of bacteria in the liquid to die-off the bacteria. The common circuit in one or more other ones of the chips is disabled. The HTML form is supplied to a browser, enabling a user of the browser to input or modify application parameters for the corresponding XML document into the form. Interconnect structures are formed in the openings in the insulating layer by using the conductive layer as part of an electroplating process.