A method and a portable device controls output of a display unit to display information accurately and clearly regardless of a background image. Execution of virtually throwing an object as represented by a first application on a first mobile device is detected. Data are removed from the contact records in the identified contact record set based on the contact priorities assigned to those contact records. This extracted bit therefore indicates whether the rule is obeyed for that chunk of the data key. Alternatively, an article includes a film layer; a collagen layer; and a biodegradable hydrogel layer comprising PHMB; wherein the biodegradable hydrogel layer comprising PHMB is disposed between the film layer and the collagen layer.