Abstract: Disclosed are a silicon-containing compound, a liquid crystal composition comprising the same compound, and a liquid crystal display device comprising a liquid crystal layer prepared from the liquid crystal composition. The silicon-containing compound, which forms the liquid crystal composition, has low viscosity and high positive dielectric anisotropy. Therefore, it is possible to provide a liquid crystal display device, which has a fast response time and can be driven at a low voltage.

Abstract: Disclosed are a silicon-containing compound, a liquid crystal composition comprising the same compound, and a liquid crystal display device comprising a liquid crystal layer prepared from the liquid crystal composition. The silicon-containing compound, which forms the liquid crystal composition, has low viscosity and high negative (?) dielectric anisotropy. Therefore, it is possible to provide a liquid crystal display device, which has a fast response time and can be driven at a low voltage.

Abstract: Provided is a configuration for conveniently performing an ground with respect to a film-typed front filter, comprising: a panel; a film-typed front filter attached to a front surface of the panel; a back cover installed at the rear of the panel; a front cabinet equipped at the front of the panel; a frame electrically connected with the back cover; and a grounding member providing with the first point connected with the frame and the second point grounding the film-typed front filter upwardly as a different goods from the frame.

Abstract: A food container and refrigerator having the same are disclosed, by which a content accommodated in the food container is facilitated to be taken out of food container. The present invention includes a main body having an entrance on a topside of the main body, a cover opening or closing the entrance of the main body, and a locking unit having one side connected to the main body and the other side detachably engaged with an upper part of the cover to prevent the cover from being opened.

Abstract: The present invention relates to a crushing method using large boreholes in an underwater rock in which plural large boreholes are drilled on the rock in a predetermined space, the drilled boreholes form plural free surfaces, and the large drop hammer gives a blow to the free surface, thus enhancing the crushing effect. The crushing method is comprised of the following processes: plural large boreholes, of which each size is 100˜300 mm?, are arranged on the rock to be crushed, and are drilled in a depth of 1˜10 m, and the free surface is reserved before the drop hammer work; a middle point between the adjoining large boreholes is set as target point; the drop hammer is lift above a position perpendicular to the target point, and is free-fallen to give a blow to the rock to be crushed; and the above processes are repeatedly operated.

Abstract: Described is a radially multi-branched polymer represented by the following formula (I): ABi (I), which includes a central molecule (A) to which side-branches (B) are bonded in at least three positions (i?3). Also described are methods for preparing a multi-branched polymer as well as a porous insulating film including a multi-branched polymer.

Abstract: The present invention relates to a boring machine having differential global positioning system receiver for underwater rock and boring method thereof, new boring technology—a satellite navigation device orients the accurate position of a target—is brought to the underwater boring technology. A differential global positioning system (DGPS) receiver is provided at the body of a boring machine that is installed at the central opening of a self elevation platform (SEP) barge, the location of the boring machine is set to concentricity of the target boring position, and the position of the hull can be controlled without any movement of the boring machine. Then, the barge quickly moves to the next target boring location owing to the operation of a hull moving means so that the construction efficiency of the boring work can be enhanced.

Abstract: A device for dualizing main processors in an ATM switch and a method therefor. The device for dualizing main processors in an asynchronous transfer mode switch, including: dualization controllers, each of which is in an active mode and a standby mode and connected s with memories of each of corresponding modes by way of an MBS, each of the dualization controller is comprised of: a first-in first-out; a write buffer connected between the MBUS in the active mode and the first-in first-out; a write controller for storing data stored at the write buffer at the first-in first-out; a read buffer connected between the MBUS in the standby mode and the first-in first-out; a read controller for simultaneously storing data stored at the first-in first-out, at the read buffer, checking status of the MBUS in the standby mode, and outputting the data stored at the read buffer to the MBUS in the standby mode.

Abstract: A choke structure of microwave oven door which can effectively protect a human body by shielding the microwave leakage to outside is disclosed. The choke structure comprises a drawn side wall provided by bending from the sealing surface opposite to the front panel, a lower choke wall bent by extending outwards from an end of the drawn side wall, an outer choke wall bending by extending from an end of the lower choke wall toward the sealing surface, and an upper choke wall bent by extending from an end of the outer choke wall toward the drawn side wall. The length of the microwave transmission path is 1/4..lambda..sub.0 wherein, .lambda..sub.0 is the free space wavelength of microwave. The choke structure has a plurality of slits for dividing the choke structure into a plurality of chokes to form plural open longitudinal paths. The holes for reinforcing impedance are formed at portions of the lower choke wall opposite to the slits formed at the choke structure.

Abstract: An apparatus for controlling power of a microwave oven is disclosed in which the control thereof is easy and stable, and long-term durability is improved. The apparatus includes a control knob having a knob shaft to be inserted through a hole on a control panel, a coupler fixedly secured to the control knob shaft through the hole to be rotatably installed on the control panel together with the control knob, an annular projection integrally formed on one side of the coupler having several V-grooves formed along the peripheral surface of the annular projection, a resilient member, for instance, a wire or leaf spring, having a protrusion at a mid-position thereof, and a pair of pins for mounting the resilient member on the control panel. While controlling the power of the oven, the protrusion of the wire or leaf spring slides on the peripheral surface of the annular projection with resilient contact thereon, or remains resiliently fitted to any one of the V-grooves of the annular projection.