Abstract: An electromagnetic stylus includes a hollow body, a pen-nib device, an energy transforming device, a circuit board, and an electricity storage device. The pen-nib device is disposed at one end of the hollow body. The energy transforming device is disposed in the hollow body for converting variations in a physical quantity into electrical signals. The circuit board is disposed in the hollow body and electrically connected to the energy transforming device for rectifying the electrical signals transformed by the energy transforming device. The electricity storage device is disposed in the hollow body and electrically connected to the pen-nib device, for receiving the electrical signals transmitted from the circuit board to generate electrical energy and providing the electrical energy to the pen-nib device to generate electromagnetic signals.

Abstract: An electromagnetic stylus includes a hollow body, a pen-nib device, an energy transforming device, a circuit board, and an electricity storage device. The pen-nib device is disposed at one end of the hollow body. The energy transforming device is disposed in the hollow body for converting variations in a physical quantity into electrical signals. The circuit board is disposed in the hollow body and electrically connected to the energy transforming device for rectifying the electrical signals transformed by the energy transforming device. The electricity storage device is disposed in the hollow body and electrically connected to the pen-nib device, for receiving the electrical signals transmitted from the circuit board to generate electrical energy and providing the electrical energy to the pen-nib device to generate electromagnetic signals.

Abstract: An electronic device for receiving a physiological signal of a user comprises a physiological signal receiving device and a computing device. The physiological signal receiving device comprises: a sensor, configured to receive the physiological signal of the user; a first processor, coupled to the sensor, and configured to convert the physiological signal into a digital signal; a first communication interface, configured to output the digital signal; a battery and power management system; and an ExpressCard connector, coupled to the first processor. The computing device comprises a second communication interface, configured to receive the digital signal; and an ExpressCard socket.

Abstract: A distributed absorbing surveillance apparatus comprising a plurality of surveillance branches at which data of a video image frame is characterised, indexed and stored locally in real-time upon capturing means browsing and searching can be conducted locally at a relatively low computational overhead upon receipt of searching instructions from a central query processor. Such a distributed surveillance apparatus also facilitates enhanced target searching speed and efficiency.