This is a system of roof vents, which prevents a pressure difference across a roof sufficient to lift the roof off. In one aspect of the invention, all of the bytes of the line data communications channel are combined with the bytes of the sections data communications channel to create a single data communications channel. The apparatus for controlling the collection of body fluids includes a drainage tube and a fluid collection chamber in fluid communication with the drainage tube. The backing member can be at least partially encapsulated using a material forming a surface. The fourth impurity concentration peak is higher than the third impurity concentration peak, and a fifth impurity concentration peak is higher than the third impurity concentration peak. A preferred oxidized organosilane film is produced by reaction of methylsilane, CH3SiH3, dimethylsilane, 2SiH2, or 1,1,3,3-tetramethyl-disiloxane, 2SiHOSiH2, and nitrous oxide, N2O, at a constant RF power level from about 10W to about 150W, or a pulsed RF power level from about 20W to about 250W during 10% to 30% of the duty cycle.