Abstract: A communication apparatus includes an acquisition unit configured to acquire a media content, a transmission unit configured to transmit the media content acquired by the acquisition unit to another communication apparatus, a determination unit configured to determine whether to describe, as an acquisition source URL of the media content acquired by the acquisition unit, a URL of the communication apparatus or a URL of the another communication apparatus, in accordance with a state of transmission of the media content by the transmission unit, a generation unit configured to generate, based on the determination made by the determination unit, a description file in which the acquisition source URL of each predetermined unit of the media content is described, and a provision unit configured to provide the description file generated by the generation unit.

Abstract: A transmission apparatus includes an acquisition unit configured to acquire a list indicating segment data that is acquirable by a receiving apparatus from among a plurality of pieces of segment data obtained by dividing content data, a determination unit configured to determine according to the list, and a control unit configured to perform control to transmit the list at a first timing, if the determination unit determines that the list contains information about segment data that has not been transmitted to the receiving apparatus, and to perform control to transmit the list or a list acquired after the list has been acquired by the acquisition unit at a second timing, which is a timing later than the first timing, if the determination unit determines that the list does not contain information about segment data that has not been transmitted to the receiving apparatus.

Abstract: An output of a direct current power supply is divided with a pair of resistors, and applied to any of electrodes of an electrochemical gas sensor provided with a detection electrode, a counter electrode and a solid electrolyte membrane through a buffer amplifier. Impedance of the gas sensor is measured by switching with a switch the connection destination of one electrode of the electrochemical gas sensor between a current amplification circuit and an impedance measurement circuit. The impedance measurement circuit is formed of an alternating current power supply that switches a potential of a resistor on a side of one end connected to the switch and a potential on a side of the other end of the resistor, between the output potential and the ground potential of the direct current power supply.

Abstract: An aqueous solution of a Na salt of a phenol sulfonic acid polymer as a liquid electrolyte is held in a separator of a liquid electrochemical gas sensor. A sensing electrode and a counter electrode are connected to the separator to detect CO at a range from about ?40° C. to about 70° C.

Abstract: Water is stored in a metal can, and water vapor is supplied to a separator through an opening in a washer. The separator is an alkali metal salt in a sulfonated synthetic resin membrane, and KOH aqueous solution is used as the electrolyte, and the sensing electrode and the counter electrode are Pt—C, and solid proton conductive membranes are placed between the electrodes and the separator.

Abstract: A test signal is applied in parallel with an electrochemical gas sensor for about ten seconds, while an amplifying circuit is turned off. After turning off the test signal, the amplifying circuit is turned on. If the gas sensor outputs an waveform of a predetermined shape in a predetermined period after the turning-on, the gas sensor will be judged to be normal.

Abstract: A test signal is applied in parallel with an electrochemical gas sensor for about ten seconds, while an amplifying circuit is turned off. After turning off the test signal, the amplifying circuit is turned on. If the gas sensor outputs an waveform of a predetermined shape in a predetermined period after the turning-on, the gas sensor will be judged to be normal.

Abstract: Water is stored in a metal can, and water vapor is supplied to a separator through an opening in a washer. The separator is an alkali metal salt in a sulfonated synthetic resin membrane, and KOH aqueous solution is used as the electrolyte, and the sensing electrode and the counter electrode are Pt-C, and solid proton conductive membranes are placed between the electrodes and the separator.

Abstract: An insulating glass film is formed on a heater film, and a gas sensitive film is formed on the glass film. The MgO content in the glass is kept at 0.1 wt % or under to prevent Mg from eluting into absorbed water at low temperatures and segregating on the cathode by the detection voltage.