Abstract: Provided is an e-commerce system capable of preventing fraudulent orders by third parties and performing smooth operation of item orders. An authentication method of the e-commerce system includes a receiving step of receiving a procedure request for performing an ordering procedure from a user device, and a first screen sending step of sending an authentication screen or a review screen to the user device in accordance with communication control information that is stored in the user device and included in the procedure request. The authentication method also includes a second screen sending step of obtaining the authentication information that is input in the authentication screen, causing the user device to store the communication control information in accordance with the obtained authentication information, and sending the review screen to the user device.

Abstract: There is provided an exercise load measuring device that can measure states of metabolism during exercise.

Abstract: A bridge tap branches from a two-wire transmission line for communications and is connected to a terminal-function assisted noise filter which is then connected at the downstream end with a telephone. The terminal-function assisted noise filter comprises a terminal circuit (an impedance matching circuit with four ports) and a noise removing circuit. The terminal circuit consists mainly of two resistors connected in series with the bridge tap and a capacitor connected in parallel with the same. Accordingly, the impedance matching circuit and the noise filter equipped with the impedance matching circuit can be implemented where the communicating action of a data communication device over the main line is protected from being interfered by reflection waves derived from the bridge tap.

Abstract: An optical transmission system comprises a light source to output an optical carrier having a predetermined wavelength, a photoelectric converter, an optical transmission line, an optical circulator to apply an output light from the light source to one end of the optical transmission line and to apply a light through the same end of the optical transmission line to the photoelectric converter, and an optical modulator disposed on the other end of the optical transmission line to return a portion of the light from the optical transmission line as a reference light to the optical transmission line without modulation and to modulate another portion of the light from the optical transmission line with a transmission signal to return it to the optical transmission line as a modulated light.

Abstract: An image signal compression transmission system for transmitting and receiving a compressed image signal, having a transmitter section which entropy codes digitized image data for transmission, a transmission channel through which entropy-coded codes sent from said transmitter section are transmitted, and a receiver section which decodes said entropy-coded codes received from said transmission channel and derives an original digital image signal. In the transmitter section, digital image data is entropy coded. The entropy-coded codes are transmitted to the receiver section through the transmission channel. In the receiver section, the received codes are entropy code decoded at a decoding speed corresponding to a transmission rate on the transmission channel. Coefficient codes derived by the decoding are stored into a memory at the same speed as the decoding speed.

Abstract: A picture signal encoding multiplexing method and apparatus in which encoded data of a plurality of picture signals, which are respectively output from a plurality of picture signal encoding processing units, is multiplexed in a channel multiplexing unit. The method includes the steps of: generating a transmission rate control signal corresponding to information related to the encoded distortion supplied from each of picture signal encoding processing units in a channel multiplexing unit, and supplying the transmission rate control signal to each of the picture signal encoding processing units; and outputting the encoded data of the picture signal from each of the picture signal encoding processing units in accordance with the transmission rate control signal.