Abstract: The present invention relates to a solid oxide fuel cell, which includes a plurality of unit cells and a connection layer between the plurality of unit cells, wherein each of the unit cells includes an anode, a cathode and a solid electrolyte between the anode and the cathode, and the connection layer includes i) a first layer containing La-ferrite including one or more selected from the group consisting of Sr, Ca and Ba; and ii) a second layer containing La-ferrite including one or more selected from the group consisting of Sr, Ca and Ba, and one or more cerias selected from the group consisting of GDC (Gd doped ceria), LDC (La-doped ceria) and SDC (Sm-doped ceria), wherein the first layer is in contact with the cathode of each of the unit cells and the second layer is in contact with the anode of each of the unit cells.

Abstract: This invention relates to a unit cell for a flat-tubular solid oxide fuel cell or solid oxide electrolyzer, and a flat-tubular solid oxide fuel cell and a flat-tubular solid oxide electrolyzer using the same, and more particularly to a unit cell for a flat-tubular solid oxide fuel cell or solid oxide electrolyzer, wherein the unit cell includes a connector including connection parts, thus decreasing the thickness of the unit cell and reducing the size of a cell stack, and to a flat-tubular solid oxide fuel cell and a flat-tubular solid oxide electrolyzer using the same.

Abstract: Disclosed herein is a flat-tubular solid oxide cell stack in which the pathway of chemical reactions is long and the temperature and flow rate of feed gas are maintained at uniform levels, thus the efficiency of electrical energy generation is increased when the cell stack is used as a fuel cell, and the purity of generated gas (hydrogen) is increased when the cell stack is used as a high-temperature electrolyzer.

Abstract: A device for a solid oxide fuel cell or a solid oxide electrolysis cell includes an integral one-piece construction of a current collector and a manifold. The device eliminates the need for a brazing or thermal bonding process for joining the manifold with the current collector, and thus makes it possible to prevent breakdown of the junction formed between the manifold and the current collector, which can lead to gas leakage through the junction, and thus can be used for a long period of time.

Abstract: Disclosed herein is a method of manufacturing a high-density fiber reinforced ceramic composite material, including the steps of: 1) impregnating a fiber preform material multi-coated with pyrolytic carbon and silicon carbide to form impregnated fiber reinforced plastic composite material; 2)carbonizing the impregnated fiber reinforced plastic composite material to form carbonized fiber composite material; 3) a primary reaction-sintering of the fiber composite material; 4) cooling the primarily reaction-sintered fiber composite material down to room temperature and then impregnating the primarily reaction-sintered fiber composite material with a solution in which a polymer precursor for producing silicon carbide (SiC) is dissolved in a hexane (n-hexane) solvent; and 5) a secondary reaction-sintering of the fiber composite material; and a high-density fiber reinforced ceramic composite material manufactured using the method.

Abstract: A collector for a fuel cell and a fuel cell are provided. The collector for a fuel cell comprises a conductive material and silicon carbide, wherein the conductive material is disposed in the silicon carbide. The collector for a fuel cell according to the present invention has excellent electrical conductivity both at a high temperature of 850° C. or more and at room temperature because it includes a conductive material and silicon carbide.

Abstract: Disclosed is a silicon carbide honeycomb having porosity of 5% or less but exceeding 0% and including silicon carbide and metal silicon. Also disclosed is a method of preparing a silicon carbide honeycomb. Further, disclosed is a solar receiver comprising silicon carbide and metal silicon.

Abstract: Disclosed herein is a flat-tubular solid oxide cell stack. The cell stack includes a plurality of unit cells which are stacked one on top of another. Each unit cell includes a flat-tubular electrode support made of a porous conductive material. A first-gas flow channel is formed in the electrode support in a longitudinal direction thereof. First gas flows along the first-gas flow channel. A second-gas flow channel is formed on the outer surface of the electrode support. Second-gas flows along the second-gas flow channel. A connection hole is formed on each of opposite ends of the first-gas flow channel of each of the unit cells and communicates with the first-gas flow channel of the adjacent unit cell so that the first gas flows along the unit cells in a zigzag manner in the longitudinal directions of the unit cells.

Abstract: The present invention relates to a composition for preventing and treating acne, comprising a material which has excellent antibacterial activity against Propionibacterium acnes known as acne-causing bacteria and which shows strong antibacterial activity against skin floras that enlarge the site of inflammation to worsen acne, in which the material also helps to regenerate skin cells damaged by acne. The composition comprises bee venom (collected from Apis meliffera) and is used the form of soap, cosmetic products, and medical products for skin application such as ointments, bands and dressings, which are used to fundamentally prevent and treat acne.

Abstract: A method and system for assessing a user reputation and/or a content reliability on contents sharing web sites is provided. In one embodiment, the method includes defining a networked association between users based on social activity information related to the users' social activities on a contents sharing web site, the users' social activities including social activities between the users and/or social activities of the users on the contents sharing web site; obtaining a link relation for at least one of the users based on the networked association; and computing a user reputation for the at least one of the users based on the link relation. The method may further include computing a content reliability of the at least one user-created contents based on the computed user reputation.

Abstract: A data communication system and a communication control method are provided. The data communication system includes a data transmission apparatus and a data receiving apparatus connected to each other through two or more parallel paths; and two or more routers disposed on the two or more parallel paths, respectively, wherein at least one of the routers detects bandwidth aggregation communication being performed on the parallel paths, from data transmitted through the at least one of the routers, and controls a sum of transmission rates used for the bandwidth aggregation communication to be lower than an upper-limit transmission rate during the bandwidth aggregation communication.

Abstract: A camera for storing photographed images in a storage device connected to the camera through a network and a method of operating the storage device of the camera. The camera includes a photographing unit photographing an object to generate image data of the object; a transfer unit transferring the image data to a storage device to store the image data therein; and a storage device setting unit transferring the image data to at least one second storage device if it is determined that the first storage device is no longer able to store the image data while the image data is being transferred to and stored in the first storage device.

Abstract: The present invention relates to a contact-less power supply magnetically coupled to a battery device having a receiving coil therein, for contact-less charging the battery device, the contact-less power supply having a sending coil array including a plurality of sending coils for inducing a charging power to the receiving coil; and a driving means for detecting a sending coil magnetically coupled to the receiving coil and selectively driving only the detected sending coil.

Abstract: A system, method and apparatus for contact-less charging of battery operated devices is presented. There is a host charger with a power converter and resonant tank circuit and a portable device where the battery is located, with a battery charging control IC. The method obviates the need for a voltage controller in each of both the host and the portable stages, thus decreasing complexity and increasing efficiency. The charging of the battery in the portable device is controlled by a charging controller therein, which is in continual electric communication with the host, whose output power the control IC dynamically monitors and controls. Two embodiments for the charging circuitry in the portable device are presented. In one embodiment component count is minimized but battery charging is not optimized when the battery voltage is very low. In the other embodiment charging efficiency is maximized regardless of the output voltage of the battery, but additional components are utilized.

Abstract: A pulse width modulation (PWM) signal generating circuit that generates a PWM signal for a DC-DC converter using a dimming signal is provided. The PWM signal generating circuit includes a normal PWM signal generator configured to generate a normal PWM signal based on a clock signal provided to the DC-DC converter, and a compensation PWM signal generator configured to generate a compensation PWM signal based on the clock signal and the dimming signal.

Abstract: The present invention relates to a wireless charger for a mobile communication terminal, which allows charging a plurality of batteries in a conveniently way without any terminal connection of the batteries to chargers for various mobile communication terminals such as a cellular phone and PDA and also allows intercepting electromagnetic waves while the charger is used, by means of Faraday's law. The wireless charger of the present invention includes a charger body having an electromagnetic wave intercepting means; a charging pad received in the charger body; and at least one battery that is to be charged by means of induced electromotive force generated by the charging pad, wherein the charger body includes a power supply means, a housing having a receiver for receiving the charging pad and connected to the power supply means, and a cover hinged to the housing.

Abstract: A method and system for assessing a user reputation and/or a content reliability on contents sharing web sites is provided. In one embodiment, the method includes defining a networked association between users based on social activity information related to the users' social activities on a contents sharing web site, the users' social activities including social activities between the users and/or social activities of the users on the contents sharing web site; obtaining a link relation for at least one of the users based on the networked association; and computing a user reputation for the at least one of the users based on the link relation. The method may further include computing a content reliability of the at least one user-created contents based on the computed user reputation.

Abstract: Tubular solid oxide fuel cells are provided. In one embodiment, fluid flow channels are defined by a plurality of bridges between a core and an outer wall of an electrode support. In another embodiment, a fluid supply channel and fluid discharge channels of an electrode support are formed in a double-wall structure. Electric current distribution and gas distribution are facilitated in the solid oxide fuel cells.

Abstract: A wireless charger charges a storage battery of a portable electronic device in a wireless manner (non-contacting or contact-less) so that a variation of charging efficiency is not serious though the storage battery is placed any position of the wireless charger. The wireless charger is provided with a primary coil for generating a magnetic field so as to charge a subject, which is provided with a secondary coil, by means of inductive coupling with the secondary coil. The primary coil includes an outer coil arranged with a predetermined winding number and a predetermined size; and at least one inner coil arranged to be included inside the outer coil. The outer coil and the inner coil are arranged so that, when a primary current is applied to the outer coil and the inner coil, magnetic fluxes generated in the outer coil and the inner coil are formed in the same direction.

Abstract: The present invention relates to a contact-less power supply magnetically coupled to a battery device having a receiving coil therein, for contact-less charging the battery device, the contact-less power supply having a sending coil array including a plurality of sending coils for inducing a charging power to the receiving coil; and a driving means for detecting a sending coil magnetically coupled to the receiving coil and selectively driving only the detected sending coil.