Abstract: An ultrasonic cleaning device including an ultrasonic transducer (13) for providing ultrasonic energy to a propagation liquid (15), an ultrasonic propagation tube (12) for flowing the propagation liquid provided with the ultrasonic energy by the ultrasonic transducer, a holding mechanism disposed below the ultrasonic propagation tube for holding an object to be cleaned (21), and a cleaning liquid supply mechanism for supplying a cleaning liquid to a cleaning surface of the object to be cleaned held by the holding mechanism, and the ultrasonic propagation tube (12) is disposed so that a side surface thereof may contact a liquid film (19) of the cleaning liquid formed on the cleaning surface by supplying the cleaning liquid to the cleaning surface by the cleaning liquid supply mechanism.

Abstract: An ultrasonic cleaning device includes an ultrasonic transducer (13) for providing ultrasonic energy to a propagation liquid (15), an ultrasonic propagation tube (12) for flowing the propagation liquid provided with the ultrasonic energy by the ultrasonic transducer, a holding mechanism disposed below the ultrasonic propagation tube for holding an object to be cleaned (21), and a cleaning liquid supply mechanism for supplying a cleaning liquid to a cleaning surface of the object to be cleaned held by the holding mechanism. The ultrasonic propagation tube (12) is disposed so that a side surface thereof may contact a liquid film (19) of the cleaning liquid formed on the cleaning surface by supplying the cleaning liquid to the cleaning surface by the cleaning liquid supply mechanism.

Abstract: An ultrasonic cleaning device is provided which can easily cope with an increase in a diameter of a cleaning surface of an object to be cleaned. An ultrasonic cleaning device according to the present invention includes an ultrasonic transducer 13 for providing ultrasonic energy to a propagation liquid 15, an ultrasonic propagation tube 12 for flowing the propagation liquid provided with the ultrasonic energy by the ultrasonic transducer, a holding mechanism disposed below the ultrasonic propagation tube for holding an object to be cleaned 21, and a cleaning liquid supply mechanism for supplying a cleaning liquid to a cleaning surface of the object to be cleaned held by the holding mechanism, and the ultrasonic propagation tube 12 is disposed so that a side surface thereof may contact a liquid film 19 of the cleaning liquid formed on the cleaning surface by supplying the cleaning liquid to the cleaning surface by the cleaning liquid supply mechanism.

Abstract: An ultrasonic cleaning device is provided which can easily cope with an increase in a diameter of a cleaning surface of an object to be cleaned. An ultrasonic cleaning device according to the present invention includes an ultrasonic transducer 13 for providing ultrasonic energy to a propagation liquid 15, an ultrasonic propagation tube 12 for flowing the propagation liquid provided with the ultrasonic energy by the ultrasonic transducer, a holding mechanism disposed below the ultrasonic propagation tube for holding an object to be cleaned 21, and a cleaning liquid supply mechanism for supplying a cleaning liquid to a cleaning surface of the object to be cleaned held by the holding mechanism, and the ultrasonic propagation tube 12 is disposed so that a side surface thereof may contact a liquid film 19 of the cleaning liquid formed on the cleaning surface by supplying the cleaning liquid to the cleaning surface by the cleaning liquid supply mechanism.

Abstract: The present invention relates to none return to zero (NRZ) modulation method. The NRZ optical modulation is performed by combining a clock signal and NRZ data at a sending end and signal distortion capable of being generated when the clock signal and the NRZ data are combined is optimized by controlling the magnitude and phase of the clock signal. At the receiving end, the clock signal is extracted by performing narrow band band-pass filtering of the detected optical signal transmitted from a transmitter and data is recovered using the clock signal. Therefore, a receiver structure for clock extraction is simpler, an error rate of data recovery is lower by clearly extracting the clock signal, and transmission distance of the optical signal is longer.

Abstract: A key management device and method which is required for provision of a security service in an EPON vulnerable to security breaches due to characteristics of Ethernet. A session key distribution function is performed in such a manner that, during the process of communication setup between an OLT and an ONU, the OLT multicasts a public key and the ONU receives the public key from the OLT and then distributes a corresponding session key to the OLT. A session key update function is performed in such a manner that an existing session key is updated with a new one through a periodic MPCP general gate message and an ONU report message.

Abstract: Disclosed is a device and method that relates to radio engineering and especially to data transmission in a wireless local area network. The method improves the throughput of the wireless local area network, by selecting a transmission rate, data transmission mechanism and a fragment size which maximize the network throughput considering the receiving conditions on the receiving station (bit error rate in the transmitted data units of the transmitting station) and taking into account the current network loading are selected for transmission of data units.

Abstract: A wheel end assembly of the present invention includes a carrier and a wheel bearing assembly, and an outside inner race is integrally formed with a spindle of the wheel bearing assembly. A wheel end assembly of the present invention includes: a carrier having a cylindrical member on its one side and a second through pipe on its other side; and a wheel bearing assembly comprising a spindle integrally formed with an outside inner race on its one side and having an insert groove on its other side, a hub having an outer race having ball receiving members receiving balls, an inside inner race provided on the inner side of the outer race by pressurization, and a seal member sealing a gap between the inside inner race and the outer race.

Abstract: Single stage and cascaded stage magnetophoretic microseparators are disclosed that efficiently separate blood cells from whole blood based on their native magnetic properties using a high gradient magnetic field without the use of additives such as magnetic tagging or fluorescent dyes. The microseparators are fabricated using microfabrication methods, enabling integration of micro-scale magnetic flux concentrators in an aqueous microenvironment, providing strong magnetic forces, and fast separations.

Abstract: A method for drying washed objects which is capable of drying the objects in a reduced period of time, effectively preventing contamination of the objects, and preventing energy loss. The apparatus for carrying on the method of drying washed objects includes a drying tank having an opening on the upper portion thereof so that the washed objects can be placed or taken out from above, and a rinsing tank formed integrally with the drying tank, and is capable of being sealed hermetically by closing an openable and closable lid. The drying tank includes a mist-straightening vane for supplying organic solvent mist at normal temperatures to the washed objects, so that the washed objects are dried by organic solvent mist emitted from the mist-straightening vane.

Abstract: An apparatus and method for monitoring an optical signal are provided. In the apparatus, a polarization adjusting unit converts the state of polarization of an optical signal. A polarization beam splitter splits the optical signal into a first polarization component and a second polarization component perpendicular to each other. An optical intensity measuring unit measures the optical intensity of the first polarization component. A feedback control unit controls the polarization adjusting unit so that the first and second polarization components are aligned to the two axes of the polarization beam splitter. A scrambler scrambles the optical signal input to the transmission optical fiber. According to the apparatus and method, optical signal-to-noise ratio (OSNR) can be measured accurately.

Abstract: The present invention relates to none return to zero (NRZ) modulation method. The NRZ optical modulation is performed by combining a clock signal and NRZ data at a sending end and signal distortion capable of being generated when the clock signal and the NRZ data are combined is optimized by controlling the magnitude and phase of the clock signal. At the receiving end, the clock signal is extracted by performing narrow band band-pass filtering of the detected optical signal transmitted from a transmitter and data is recovered using the clock signal. Therefore, a receiver structure for clock extraction is simpler, an error rate of data recovery is lower by clearly extracting the clock signal, and transmission distance of the optical signal is longer.

Abstract: A key management device and method which is required for provision of a security service in an EPON vulnerable to security breaches due to characteristics of Ethernet. A session key distribution function is performed in such a manner that, during the process of communication setup between an OLT and an ONU, the OLT multicasts a public key and the ONU receives the public key from the OLT and then distributes a corresponding session key to the OLT. A session key update function is performed in such a manner that an existing session key is updated with a new one through a periodic MPCP general gate message and an ONU report message.

Abstract: A method for drying washed objects which is capable of drying the objects in a reduced period of time, effectively preventing contamination of the objects, and preventing energy loss. The apparatus for carrying on the method of drying washed objects includes a drying tank having an opening on the upper portion thereof so that the washed objects can be placed or taken out from above, and a rinsing tank formed integrally with the drying tank, and is capable of being sealed hermetically by closing an openable and closable lid. The drying tank includes a mist-straightening vane for supplying organic solvent mist at normal temperatures to the washed objects, so that the washed objects are dried by organic solvent mist emitted from the mist-straightening vane.

Abstract: An apparatus and a method for drying washed objects being capable of drying the objects in a reduced period of time, effectively preventing contamination of the objects, and preventing energy loss are provided. The apparatus for drying washed objects includes a drying tank having an opening on the upper portion thereof so that the washed objects can be placed or taken out from above, and a rinsing tank formed integrally with the drying tank, and is capable of being sealed hermetically by closing the openable and closable lid. The drying tank includes a mist-straightening vane for supplying organic solvent mist at normal temperatures to the washed objects, so that the washed objects are dried by organic solvent mist emitted from the mist-straightening vane.

Abstract: An apparatus and a method for drying washed objects being capable of drying the objects in a reduced period of time, effectively preventing contamination of the objects, and preventing energy loss are provided. The apparatus for drying washed objects includes a drying tank having an opening on the upper portion thereof so that the washed objects can be placed or taken out from above, and a rinsing tank formed integrally with the drying tank, and is capable of being sealed hermetically by closing the openable and closable lid. The drying tank includes a mist-straightening vane for supplying organic solvent mist at normal temperatures to the washed objects, so that the washed objects are dried by organic solvent mist emitted from the mist-straightening vane.