Abstract: An apparatus of tilting a seat cushion of a vehicle, includes a tilting motor, a pinion gear, a sector gear, and a tilting link which perform the tilting operation of the seat cushion and exert a binding force in a tilted state of the seat cushion and are provided to be connected to both of one side and the other side of a seat cushion frame, and has two sector gears positioned on left and right sides and connected to each other by a connection bar so that, by strengthening a binding force of the front portion of the seat cushion, it is possible to secure the safety of passengers in the event of a collision.

Abstract: Provided are a pulse compressor and a two-photon excited fluorescence microscope. The microscope includes a light source which generates a laser beam having a pulse, a pulse compressor which compresses the pulse of the laser beam, an objective lens which provides the laser beam to a specimen, and image sensors which receive the laser beam and obtain images of the specimen. The pulse compressor may include a grating plate, a corner cube provided on one side of the grating plate, and a retroreflector provided on the other side of the grating plate.

Abstract: A device for decreasing hydrogen concentration of a fuel cell system is installed in an exhaust system for discharging exhaust gas which includes hydrogen and air and is discharged from fuel cells to the atmosphere through an exhaust line. The device includes a catalyst diluter having catalysts for diluting the hydrogen in an exhaust gas by generating a catalytic reaction and connected to the exhaust line. An air diluter is disposed outside the catalyst diluter and guides external air to a gas exit side of the catalyst diluter.

Abstract: An exhaust port structure of a fuel cell vehicle includes a re-circulation fluid passage mounted on an upper portion of an exhaust pipe so as to be arranged parallel to the exhaust pipe, and a mixing pipe mounted on an end of the exhaust pipe and through which external air is suctioned. When a concentration of hydrogen in exhaust gas exceeds a reference value, hydrogen is re-circulated into the exhaust pipe via the re-circulation fluid passage and mixed with external air through the mixing pipe before being exhausted to outside. As a result, during starting and hydrogen purge to remove hydrogen from a fuel cell, the gas with high hydrogen concentration exhausted from the fuel cell and exhausted out of the vehicle can have reduced hydrogen concentration through the re-circulation fluid passage and the mixing pipe.

Abstract: An apparatus for detecting a filter contamination of a fuel cell includes: a signal transmitter configured to transmit at least one signal; a signal receiver configured to receive the at least one signal from the signal transmitter; and a resistor unit including a silver compound disposed between the signal transmitter and the signal receiver and having a resistance which varies according to a chemical reaction.

Abstract: A device for decreasing hydrogen concentration of a fuel cell system is installed in an exhaust system for discharging exhaust gas which includes hydrogen and air and is discharged from fuel cells to the atmosphere through an exhaust line. The device includes a catalyst diluter having catalysts for diluting the hydrogen in an exhaust gas by generating a catalytic reaction and connected to the exhaust line. An air diluter is disposed outside the catalyst diluter and guides external air to a gas exit side of the catalyst diluter.

Abstract: An apparatus for detecting a filter contamination of a fuel cell includes: a signal transmitter configured to transmit at least one signal; a signal receiver configured to receive the at least one signal from the signal transmitter; and a resistor unit including a silver compound disposed between the signal transmitter and the signal receiver and having a resistance which varies according to a chemical reaction.

Abstract: An exhaust port structure of a fuel cell vehicle includes a re-circulation fluid passage mounted on an upper portion of an exhaust pipe so as to be arranged parallel to the exhaust pipe, and a mixing pipe mounted on an end of the exhaust pipe and through which external air is suctioned. When a concentration of hydrogen in exhaust gas exceeds a reference value, hydrogen is re-circulated into the exhaust pipe via the re-circulation fluid passage and mixed with external air through the mixing pipe before being exhausted to outside. As a result, during starting and hydrogen purge to remove hydrogen from a fuel cell, the gas with high hydrogen concentration exhausted from the fuel cell and exhausted out of the vehicle can have reduced hydrogen concentration through the re-circulation fluid passage and the mixing pipe.

Abstract: Disclosed is a humidifier for a fuel cell system including a separator plate which is corrugated to provide an alternating concave-convex surface, and humidifying films provided at an upper end and a lower end of the separator plate, respectively. More specifically, the separator plate and the humidifying films form a series of drift spaces in which a width of an upper end portion is different from a width of a lower end portion which is contact with the humidifying film.

Abstract: A fuel cell system is provided. More specifically, the fuel cell system is made up of an aggregate of unit fuel cells, an air supply unit, a humidifier, a hydrogen supply unit, and a valve unit. The valve unit is configured to be connected to a stack and the humidifier. This valve unit prevents external air from being introduced to an air supply path and an air exhaust path through the humidifier when the stack is turned off. More specifically, the valve unit includes a valve body component constituting the air supply path as first and second valve passages and the air exhaust path as third and fourth valve passages and an opening and closing component for opening and closing the air supply path and the air exhaust path.

Abstract: A method for carrying out an idle handoff from a macrocell to a microcell (picocell) in a hierarchical cell structure includes the steps of: a) allocating different frequency assignments (FA) to the macrocell and the microcell in a same service band, to construct the hierarchical cell structure; b) transmitting cell structure information of neighboring base stations and pseudo noise (PN) code from base station to mobile station; c) checking whether the mobile station is in the hierarchical cell by using the cell structure information of neighboring base station; and d) checking whether a value of the pseudo noise (PN) code is greater than T_ADD and greater than Ec/Io of the macrocell by periodically searching the pseudo noise (PN) code of the microcell, to carry out an idle handoff to the microcell, wherein the T_ADD represents a value of base station pilot strength required for the base station of neighboring set to be included in a candidate set, the Ec represents an pilot energy accumulated during one pseu

Abstract: An apparatus and method for measuring the quality of a reverse link and the load of a base station (BTS) in a CDMA mobile telecommunication system. The apparatus and method periodically detect the power of a receiving signal from a mobile station to a BTS, constructs a practical statistical distribution curve for a power ratio of signal to interference, compares the practical distribution curve with the theoretical distribution curve pre-constructed based upon the parameter condition of a BTS, and determines the quality of a reverse link based upon the difference between the distribution curves.

Abstract: A macro-micro cell structure of wireless communication system for separately processing a forward and a reverse telecommunications in order to increase a reverse link capacity is disclosed. The wireless telecommunication system has a macro cell and at least one micro cell within the macro cell. A micro cell signal processing unit processes a transmission and reception signal of a mobile station located at a service region of the micro cell. A micro cell base station transmits a micro cell forward signal provided from said micro cell signal processing unit to the mobile station to receive a micro cell reverse signal, and receives a macro cell reverse signal of the mobile station which is located at the macro cell and has a short wave path contrast to the macro cell. A macro cell signal processing unit transmits a forward signal to the mobile station through a macro cell antenna and processes the reverse signal provided from said macro cell antenna or said micro cell base station.

Abstract: A microcelluar mobile communication system which performs various functions such as a centralized management of resources, a capacity increase, a Base Station Transceiver System(BTS) miniaturization, a synchronization between micro base stations, a dynamic resource management, a softer handover between cells, a grouping and ungrouping of base stations in accordance with a traffic distribution. The microcelluar mobile communication system may increase the subscriber capacity, provide the high reliable service, extend the battery life of a personal station inducing low power communication and assure the radio channel capacity so that the radio multimedia service may be accomplished in the future, by maximizing the utility efficiency of radio frequency resource through cell miniaturization. The microcelluar mobile communication system may be installed efficiently to an indoor, a building underground, an underground tunnel as well as an outdoor, and may compose the single cell also in the indoor.

Abstract: Disclosed is a waste gas disposal apparatus and method of the same which eliminates efficiently toxic components of waste gas resulted from semiconductor manufacture process prior to waste gas emission to the atmosphere, showing improvements in disposal efficiency, safety and costs.This apparatus is comprised of an inlet head into which waste gas, inert gas and air are introduced, respectively; a heating chamber provided under the inlet head for heating up the incoming mixture gas from the inlet head to create reactant fine particles from a heating reaction; a reaction preventive unit provided in the heating chamber for making impossible to react the waste gas to the air at upper portion of the heating chamber; a scrubber unit connected to the heating chamber for scrapping off the solid dust particles adsorbed to the inner wall thereof; and a container connected to the scrubber unit by an engagement member for storing the off solid dust particles therein.