Abstract: Methods, systems, and devices for operating a wearable device are described. The wearable device may determine that a user is wearing the wearable device. The wearable device may collect physiological data from the user based on determining that the user is wearing the wearable device. The wearable device may then determine an identity of the user based at least in part on the collected physiological data matching a physiological profile associated with the identity. The wearable device may then authenticate the user for an action by the wearable device that requires user authentication.

Abstract: An apparatus includes a printed wiring board including multiple layers including inner and outer layers. At least one of the inner layers includes an integral temperature sensor matrix. The temperature sensor matrix includes multiple temperature sensors arrayed over at least part of area occupied by the at least one of the layers. A method includes measuring information corresponding to temperatures in the temperature sensor matrix, and outputting indications of the information. The information may be displayed, e.g., as a thermal image of the printed wiring board.

Abstract: An apparatus includes a printed wiring board including multiple layers including inner and outer layers. At least one of the inner layers includes an integral temperature sensor matrix. The temperature sensor matrix includes multiple temperature sensors arrayed over at least part of area occupied by the at least one of the layers. A method includes measuring information corresponding to temperatures in the temperature sensor matrix, and outputting indications of the information. The information may be displayed, e.g., as a thermal image of the printed wiring board.