Abstract: A welding torch includes: a cylindrical tip body extending in an axis line direction; an orifice member arranged on a radially outer side of the tip body, between which and the tip body a first ring-like space is formed; a cylindrical nozzle arranged on a radially outer side of the orifice member with an interposition of a second ring-like space and having an edge on one side in the axis line direction. The tip body has a first emission hole via which an inner space of the tip body communicates with the first ring-like space, and the orifice member has a second emission hole via which the first ring-like space communicates with the second ring-like space. The second ring-like space is substantially closed by a sealing part on another side in the axis line direction, and an outlet opening of the second emission hole is arranged close the sealing part.

Abstract: A user invited to a session can see the content of the conversation exchanged in the session before participating in the session, so that he/she can easily decide whether or not to join the session.

Abstract: The invention provides a content providing system for making it possible to use URL information retained in a PC terminal from a mobile terminal and store content acquired as the mobile terminal accesses any URL in the PC terminal. The content providing system of the invention is a content providing system including a PC terminal 20, a mobile terminal 30 that can conduct communications with the PC terminal 20, and a Web server 10 for providing content data for the PC terminal 20 through the Internet. The PC terminal 20 has a folder 21 storing the content identifier corresponding to the content data; and an information table 28 made up of a user ID for each mobile terminal and a terminal ID and terminal specifications of the mobile terminal corresponding to the user ID.

Abstract: There are provided a report system, a mobile terminal device, and a server device capable of improving the reliability of report to a user. In the report system, an address management server device (105) acquires the latest address information on a mobile terminal device (101). A home server device (109) stores (holds) content information from an electric device (110) and performs control to acquire address information on the mobile terminal device from the address management server device (105). The home server device (109) transmits the stored content information from the address management server device (105) to the mobile terminal device (101) specified by the address information acquired from the address management server device (105). The mobile terminal device (101) receives the content information transmitted from the home server device (109) and reports the content of the content information.

Abstract: In an optical transmitter, an optical receiver and an optical wavelength multiplexing system, they can reduce the number of expensive optical parts, and can also protect a mutual interference with multiplexed optical signals of other channels, even if a wavelength interval of a signal light source is extremely narrow. Output lights of a plurality of signal laser modules and a stabilzed light source having a wavelength stableness higher than them are coupled with one wave of an adjacent wavelength. A photo-electric conversion and a heterodyne detection are performed thereon to thereby obtain a beat signal. Then, a wavelength of a signal laser module is controlled such that a frequency of the beat signal is constant. If a wavelength stabilzed light source is not used, only a relative wavelength stabilization through the heterodyne detection is carried out, and a fluctuation in an absolute wavelength is detected in a wavelength routing unit. Consequently, it is compensated.

Abstract: An optic rotation sensing apparatus includes a light source emitting light. The light emitted from the light source is transmitted to a sensing loop which provides a phase difference between opposite-direction light waves in response to a rotation. Return light outputted from the sensing loop is transmitted to a photodetector. A device modulates a phase of light propagating in the sensing loop. Another device depolarizes light propagating in the sensing loop. The invention further controls and processes an output signal representing the output of the photodetector at a phase at which a level of an AM noise component of the output signal is minimized.

Abstract: An optical phase modulator for use with a fiber optic sensor such as a fiber optic gyroscope includes a piezoelectric vibrator which is asymmetric in at least one cross-sectional shape thereof, a pair of electrodes for applying a voltage to said piezoelectric vibrator, and an optical fiber joined to at least a portion of said piezoelectric vibrator by adhesive bonding. The piezoelectric vibrator has a cavity defined therein, and one of said electrodes is disposed on a surface of said piezoelectric vibrator which defines said axial cavity, the other electrode being disposed on an outer surface of said piezoelectric vibrator. The piezoelectric vibrator may be cylindrical, elliptically cylindrical, or planar in shape. The cavity may be cylindrical or elliptically cylindrical in shape.