Abstract:
A metal oxide thin film structure for a solid oxide fuel cell, prepared by a method comprising dispersing a metal oxide nanopowder in a metal oxide salt solution and subsequent coating of the resulting metal oxide powder dispersed sol and the metal oxide salt solution on a porous substrate, has excellent gas impermeability, excellent phase stability, and is devoid of cracks or pinholes.
Abstract:
An iterative tree search-based preceding method for a multi-user Multi-Input Multi-Output (MIMO) communication system includes determining a reference value of a cumulative branch metric of a candidate symbol, eliminating candidates having values that exceed the determined reference value of the cumulative branch metric of the candidate symbol, and registering values, which do not exceed the determined reference value of the cumulative branch metric of the candidate symbol, as entries, and selecting the least value from the values registered as the entries. Thereby, the method has low complexity and similar performance compared to an existing Sphere Encoding (SE) technique.
Abstract:
An apparatus and a method are provided for detecting N number of TX signals in a MIMO wireless communication system. The apparatus includes an RF processor, a channel estimator, and a signal detector. The RF processor converts signals, received through multiple antennas, into baseband signals. The channel estimator estimates channel information of the respective antennas by using the received signals. The signal detector arranges the baseband signals of the respective antennas on the basis of the channel information, calculates a threshold value of each stage, and selects symbols with a cumulative metric smaller than or equal to the threshold value as candidates at each stage, to detect a TX signal vector with N number of symbols.
Abstract:
A method and apparatus for managing a location of a ward, the method including: determining a ward location updating period based on a current location of the ward within a safety zone; and if the determined location updating period is about to elapse, transmitting the current location of the ward at a time when the updating period elapses.
Abstract:
There is provided a spindle motor including: a sleeve rotatably supporting a shaft and having an insertion groove provided in a top surface thereof; and a rotor case mounted on a top end of the shaft and including a protruding wall part inserted into the insertion groove, wherein a lubricant, provided to generate a dynamic pressure when the shaft rotates, forms an interface with air in a clearance formed by the protruding wall part and the insertion groove.
Abstract:
The present invention relates to an apparatus for forming a nano pattern capable of fabricating the uniform nano pattern at a low cost including a laser for generating a beam; a beam splitter for splitting the beam from the laser into two beams with the same intensity; variable mirrors for reflecting the two beams split by the beam splitter to a substrate; beam expansion units for expanding diameters of the beams by being positioned on paths of the two beams traveling toward the substrate; and a beam blocking unit, installed on an upper part of the substrate, transmitting only a specific region expanded through the beam expansion unit and blocking regions a remaining region, and a method for forming the nano pattern using the same.
Abstract:
An apparatus for providing multiple screens and a method of dynamically configuring the multiple screens are provided. The apparatus for providing multiple screens retrieves the type of the screens in the device and connection relationship therebetween in order to dynamically configure multiple screens that provide a plurality of services on a physical display device. The apparatus for providing multiple screens includes an operation module generating at least one of screens for displaying a received service, and a retrieval module retrieving a screen on which an application included in the service is executed among the screens.
Abstract:
In one example, a method for fabricating a solar cell comprising a first electrode, a first-type layer, an intrinsic layer, a second-type layer and a second electrode is disclosed. At least one of the second-type layer, the intrinsic layer and the first-type layer is formed as a crystallized Si layer by an inductively coupled plasma chemical vapor deposition (ICP-CVD) device using mixed gas including hydrogen (H2) gas and silane (SiH4) gas, the mixed gas having a silane gas (SiH4) in a ratio of 0.016 to 0.02.
Abstract:
The 1T floating-body DRAM cell device includes a floating body for storing information of the DRAM cell device, a source and a drain formed on respective sides of the floating body, a gate insulating layer formed on a top of the floating body, a gate electrode formed on a top of the gate insulating layer, a gate stack formed under the floating body and configured to have a charge storage node for storing electric charges, and a control electrode formed on a lower side of the gate stack or partially or completely surrounded by the gate stack. The DRAM cell device performs “write0” and “write1” operations or a read operation. The DRAM cell device performs a non-volatile program operation or a non-volatile erase operation.