Abstract: Provided are a novel compound, an electrolyte for a lithium secondary battery containing the same, and a lithium secondary battery containing the electrolyte for a lithium secondary battery according to the present invention. The electrolyte for a secondary battery according to the present invention may have significantly excellent high-temperature stability, low-temperature discharge capacity, and life cycle characteristics.

Abstract: Provided are an electrolyte for a lithium secondary battery and a lithium secondary battery containing the same. The electrolyte for a secondary battery according to the present invention has excellent high-temperature stability, excellent low-temperature discharge capacity, and excellent life cycle characteristics.

Abstract: Provided are a novel compound, an electrolyte for a lithium secondary battery containing the same, and a lithium secondary battery containing the electrolyte for a lithium secondary battery according to the present invention. The electrolyte for a secondary battery according to the present invention may have significantly excellent high-temperature stability, low-temperature discharge capacity, and life cycle characteristics.

Abstract: Provided are an electrolyte for a lithium secondary battery and a lithium secondary battery containing the same. The lithium secondary battery using the electrolyte for a lithium secondary battery according to the present invention has excellent high-temperature stability, high-temperature capacity recovery rate, low-temperature discharge capacity, and life cycle characteristics.

Abstract: Provided are an electrolyte for a lithium secondary battery, and a lithium secondary battery containing the same, wherein the electrolyte for a secondary battery has significantly excellent high-temperature stability, low-temperature discharge capacity, and life cycle characteristics.

Abstract: Provided are an electrolyte for a lithium secondary battery, and a lithium secondary battery containing the same. An embodiment of the present invention is directed to providing an electrolyte for a lithium secondary battery having excellent high-temperature and low-temperature characteristics while properly maintaining basic performance such as high rate charge and discharge characteristics, life cycle characteristics, and the like, and a lithium secondary battery containing the same.

Abstract: Core-shell coated pigment particles are prepared by core-shell coating using pigment particles, at least one hydrophilic organometallic compound, at least one hydrophobic organometallic compound, distilled water and a solvent. Ink particles coated with an ionized organometallic compound are prepared by using the core-shell coated pigment particles, the solvent and a halogen compound. The ink particles, a dispersing agent and a dielectric liquid are mixed to prepare an ink composition. The ink composition has an electrophoresis property to exhibit an electric movement and has a good dispersibility in a dielectric liquid. The ink composition may be applied in a reflective type color display device.

Abstract: Provided is an aluminum alloy, and particularly, a die casting aluminum alloy for a heat sink, which includes 0.01 to 0.5 wt % of Cu, 0.3 to 0.6 wt % of Fe, 1.0 to 1.5 wt % of Si, and thus may enhance heat dissipation and castability.

Abstract: Core-shell coated pigment particles are prepared by core-shell coating using pigment particles, at least one hydrophilic organometallic compound, at least one hydrophobic organometallic compound, distilled water and a solvent. Ink particles coated with an ionized organometallic compound are prepared by using the core-shell coated pigment particles, the solvent and a halogen compound. The ink particles, a dispersing agent and a dielectric liquid are mixed to prepare an ink composition. The ink composition has an electrophoresis property to exhibit an electric movement and has a good dispersibility in a dielectric liquid. The ink composition may be applied in a reflective type color display device.

Abstract: The present invention relates to a satellite IP multicasting system and method for constructing an IP multicast network by a unit of internet node having a router for subscriber connection or a switch, and for transmitting a multicasting packet transmitted from a content provider into a local IP multicast network via a satellite. The satellite IP multicasting system features a backbone network, a content provider, a satellite network and a local network.

Abstract: A turbo compressor comprising a driving motor, an impeller to be rotated by the driving motor, a second gas suction part through which gas is introduced into the impeller, and a discharger through which the gas is discharged from the impeller, the turbo compressor comprises a shroud provided between the gas suction part and the gas discharger and spaced from a blade of the impeller; and a plurality of channels provided on the shroud and inclined toward the gas discharger along a rotating direction of the impeller. With this configuration, the present invention provides a turbo compressor in which compression efficiency is increased by eliminating a backflow and a leakage flow.

Abstract: A variable capacity rotary compressor to prevent eccentric bushes from rotating faster than a rotating shaft, and includes upper and lower compression chambers having different interior capacities thereof, and the rotating shaft with upper and lower eccentric cams being provided thereon to be eccentric from the rotating shaft in a common direction. Upper and lower eccentric bushes are fitted over the upper and lower eccentric cams, respectively, with a slot provided there between. A locking pin changes a position of the upper or lower eccentric bush to a maximum eccentric position. Upper and lower brake units are, respectively, provided between the upper eccentric cam and the upper eccentric bush, and between the lower eccentric cam and the lower eccentric bush. The upper and lower brake units, respectively, include first and second upper brake balls, and first and second lower brake balls, to restrain the upper and lower eccentric bushes.

Abstract: A variable capacity rotary compressor including first and second compression chambers having different capacities, and a rotating shaft. First and second eccentric cams are mounted to the rotating shaft to be eccentric in a same direction. First and second eccentric bushes are fitted over the first and second eccentric cams to make an angle between eccentric lines of the first and second eccentric bushes be less than 180°. A locking pin functions to change a position of the first or second eccentric bush to a maximum eccentric position. Further, a slot is formed on the rotating shaft between the first and second eccentric bushes. In this case, the slot having a predetermined length is formed to have a same angle as the angle between the eccentric lines of the first and second eccentric bushes. The locking pin is inserted into the slot.

Abstract: A variable capacity rotary compressor is designed to prevent eccentric bushes from slipping during a compression operation, and thereby prevent noise from being generated and increase durability. The variable capacity rotary compressor includes a housing to define first and second compression chambers having different capacities therein. First and second eccentric cams are mounted to a rotating shaft to be placed in the first and second compression chambers, respectively. First and second eccentric bushes are rotatably fitted over the first and second eccentric cams, respectively. First and second rollers are rotatably fitted over the first and second eccentric bushes, respectively. First and second vanes partition the first and second compression chambers, respectively.

Abstract: A variable capacity rotary compressor including upper and lower compression chambers having different interior capacities, and a rotating shaft. Upper and lower eccentric cams are provided on the rotating shaft to be eccentric from the rotating shaft in a same direction. Upper and lower eccentric bushes are fitted over the upper and lower eccentric cams, respectively, in such a way that a maximum eccentric part of the upper eccentric bush is opposite to that of the lower eccentric bush, with a slot provided between the upper and lower eccentric bushes. A locking pin functions to change a position of the upper or lower eccentric bush to a maximum eccentric position. Further, upper and lower brake units are respectively provided between the upper eccentric cam and the upper eccentric bush, and between the lower eccentric cam and the lower eccentric bush.

Abstract: A variable capacity rotary compressor is designed to prevent eccentric bushes from slipping during a compression operation, thus preventing noise from being generated and increasing durability. The compressor includes a housing to define two compression chambers having different capacities therein. A rotating shaft is rotated in the compression chambers. Two eccentric cams are mounted to the rotating shaft. Two eccentric bushes are rotatably fitted over the eccentric cams. Two rollers are rotatably fitted over the eccentric bushes. Two vanes are installed in the compression chambers to be reciprocated in a radial direction of the rotating shaft. A cylindrical connecting part integrally connects the eccentric bushes to each other, with a locking slot being provided around the connecting part.

Abstract: A variable capacity rotary compressor to prevent an eccentric bush and a locking pin from being deformed or worn out due to a variance in a pressure of a compression chamber as a rotating shaft rotates. The compressor includes upper and lower compression chambers having different interior capacities thereof, and a rotating shaft. Upper and lower eccentric cams are provided on the rotating shaft to be eccentric from the rotating shaft in a common direction. Upper and lower eccentric bushes are fitted over the upper and lower eccentric cams, respectively, with a slot provided at a position between the upper and lower eccentric bushes. The locking pin operates to change a position of the upper or lower eccentric bush to a maximum eccentric position. Further, surfaces of parts around first and second ends of the slot are heat-treated, thus increasing a hardness thereof.

Abstract: An air conditioner has a variable capacity rotary compressor, which allows the compressor to be smoothly re-started, thus increasing start reliability of the compressor. The air conditioner includes a compressor rotated in opposite directions. A drive unit rotates the compressor in a forward or reverse direction. A start determining unit determines whether the compressor has started to rotate in a forward direction or not. A control unit operates the drive unit so as to rotate the compressor in a direction opposite to the forward direction, and then re-start the compressor in the forward direction, when the compressor has failed to start. The air conditioner and a method of controlling the air conditioner allow the compressor to be smoothly and rapidly re-started even when the compressor has failed to re-start, thus increasing start reliability, and shortening a time required to re-start the compressor.

Abstract: A turbo compressor comprising a driving motor, an impeller to be rotated by the driving motor, a second gas suction part through which gas is introduced into the impeller, and a discharger through which the gas is discharged from the impeller, the turbo compressor comprises a shroud provided between the gas suction part and the gas discharger and spaced from a blade of the impeller; and a plurality of channels provided on the shroud and inclined toward the gas discharger along a rotating direction of the impeller. With this configuration, the present invention provides a turbo compressor in which compression efficiency is increased by eliminating a backflow and a leakage flow.

Abstract: Disclosed herein are a variable capacity rotary compressor and a refrigerant cycle system having the variable capacity rotary compressor. The compressor includes a cooling unit and a pressure reducing unit to reduce temperature and pressure of a bypassed refrigerant, thus allowing the bypassed refrigerant to have the same temperature and pressure as when entering a cylinder at first. The compressor includes the cylinder in which a refrigerant is compressed. An inlet pipe delivers the refrigerant into the cylinder. An outlet pipe delivers the refrigerant out of the cylinder. A bypass hole is provided at a predetermined position of the cylinder to bypass the refrigerant from the cylinder, thus varying a compression capacity. A bypass pipe connects the bypass hole to the inlet pipe to allow the refrigerant bypassed through the bypass hole to enter the cylinder. The cooling unit cools the refrigerant flowing through the bypass pipe.