An electrical machine comprising a rotor, a coil and a stator comprising a lamination stack coupled to a tooth, wherein the electrical machine is at least one of a transversal flux machine is described. The method involves determining if a group security policy is in place for secure communication between hosts within the group, if the group security policy is in place, advertising routing information to another host within the group, and if the group security policy is not in place, refraining from advertising routing information to the other host. The detector assembly is adapted to receive the optical radiation after attenuation by the fingertip tissue. The heat sink includes a reservoir of phase change material having a melting point temperature that is less than an upper limit of a design operating temperature of the chip. Said bonding may be performed by application of adhesive, ultrasonic bonding, compression bonding, thermal bonding, radio frequency bonding, infrared bonding and combinations thereof.