A method for routing in a multihop network comprises, for at least one multihop network node: a obtaining a value of an electromagnetic field near said node; b predetermining a ratio between said obtained value and a predefined electromagnetic field threshold value; c using the predetermined ratio to optionally select said node as a routing node for at least one message in the multihop network. In one aspect, an original video file is annotated by embedding therein information enabling rendering of at least one video summary that is contained in the annotated video file and comprises digital content summarizing at least a portion of the original video file. 02 primary hydroxyl group, on average, per molecule and a water tolerance of not less than 2. A control unit selectively places the microdisplay device elements in the transmission mode. Signals are created from each symbol by up-sampling. The patient’s respiratory rate and heart rate are displayed in assigned compartments above the horizontal line separated by the vertical line and the patient’s oxygen saturation and temperature are displayed in assigned compartments below the horizontal line separated by vertical lines.