A fastening means for a patient monitor, comprising a clamp member to be fastened to a supporting structure, a base member for supporting the patient monitor, the clamp member comprising two legs with free ends and a slot between the two legs, and a tightening means between the two legs for fastening the clamp member against the support surface placed between the two legs. The game board, the paper shredder and the shreddable cards are arranged in a box. In an online embodiment, a learning engine may learn a weighted index for classifying objects using ranked recall by dynamically updating the weighted index as each instance of the collection of objects may be categorized. It becomes possible to easily transfer a dry type electrode layer to the surface of the green sheet with high accuracy without breaking or deforming the green sheet, moreover, components of the adhesive layer do not soak in the electrode layer or green sheet.