A silicon nitride sintered body comprising Mg and at least one rare earth element selected from the group consisting of La, Y, Gd and Yb, the total oxide-converted content of the above elements being 0. In one embodiment, a method of the present invention characterize a patient’s propensity for a future epileptic seizure and communicates to the patient andor a health care provider a therapy recommendation. The slot radiator connection location is formed by means of connection points situated at the longitudinal edges and lying opposite one another. Next, the user will pull the outer towel sheet in the direction of the sloping wedge-shaped projection. Upon receipt of the haptic synchronous signals, each slave wearable haptic device generates a series of haptic feedback having a rhythm of beats in response to the haptic synchronous signals. The method is dynamically carried out in a number of cycles, whereby the sequence information obtained from a preceding cycle is used for modifying carrier-bound probes in the subsequent cycle.