Disclosed is a Security Indications and Warning Engine usable in conjunction with an audit agent. An aspect includes a computer program product for implementing design-based weighting for LBIST. The screw cover is preferably of the same color as the metal structure so as to reduce its visibility while effectively concealing the unsightly screw head. The display may represent the value of the output parameter by the length of a bar on the relevant part of the two dimensional surface. A method of treating lesions such as foot ulcers is also disclosed, that includes bathing the lesion in antibiotic mist and contacting it with oxygen gas.