At least some aspects of the present disclosure feature a computing device configured to receive an input image of an environment having a plurality of physical notes. a low-resolution overall image is taken in from an input image, and a medium-resolution image, whose center is the head part, is extracted from it. Also disclosed are novel viral attachment inhibitors and methods of use. An electrically powered locking mechanism is housed within the cylinder and includes a lock member moveable between an open position and a locked position. The method includes preparing a set of dominant error events from the intersymbol interference characteristics of media; and generating a codeword from the data using a non-primitive generator polynomial that produces a unique syndrome set which can completely specify each dominant error event. An essentially torsion-resistant operational-air line can be rotatably connected to a rotary valve that supplies the control chamber with operational air or vents air from the chamber.