Abstract:
A guide thimble plug for a nuclear fuel assembly is provided, in which an internal threaded hole is formed through a main body so that the main body is coupled to a bottom nozzle by a screw coupling. An upper insert part is formed in the upper end of the main body. The upper insert part is inserted into a shock absorption tube. A thermal deformation prevention part is formed on the main body below the upper insert part and is recessed inward from the outer surface of the main body such that, when the main body is coupled to the guide thimble, a gap is defined between the thermal deformation prevention part and the guide thimble. The guide thimble and the shock absorption tube can be reliably fastened to the bottom nozzle, and thermal deformation of the guide thimble can be minimized.
Abstract:
A top nozzle for a nuclear fuel assembly and a method of manufacturing the top nozzle are provided. The top nozzle can include a coupling plate, a perimeter wall and a hold-down spring unit. The coupling plate can be coupled to a guide thimble of the nuclear fuel assembly. The perimeter wall can protrude upwards from the perimeter of the coupling plate. A spring clamp can be provided on the upper surface of the perimeter wall. The hold-down spring unit can be mounted to the upper surface of the perimeter wall in such a way to couple a corresponding end of the hold-down spring unit to the spring clamp. A fastening pin hole can be vertically formed through an upper surface of the spring clamp. A spring insert hole into which the hold-down spring unit can be inserted and formed by electro-discharge machining in an insert direction of the hold-down spring.
Abstract:
There is provided a method of localizing an object comprising projecting an object located on an object plane and a reference point corresponding thereto on a virtual viewable plane and an actual camera plane; estimating coordinates of the reference point; and prescribing a relationship between a location of the object and the coordinates of the reference point.
Abstract:
There is provided a method of tracking an object in a three-dimensional (3-D) space by using particle filter-based acoustic sensors, the method comprising selecting two planes in the 3-D space; executing two-dimensional (2-D) particle filtering on the two selected planes, respectively; and associating results of the 2-D particle filtering on the respective planes.
Abstract:
The present invention relates to a method for preparing a uniformly aligned zeolite supercrystal, which comprises growing a crystal of a zeolite or zeotype material in a uniformly aligned template, whereby said uniformly aligned zeolite supercrystal is prepared, and a uniformly aligned zeolite supercrystal. The uniformly aligned zeolite supercrystal of this invention would be anticipated to maximize its applicability by overcoming the shortcomings of zeolites with random orientation.
Abstract:
A display system and a method of eliminating a residual image on a display causes an on screen display (OSD) block to be moved to different locations on the display to eliminate the residual image. In a method embodying the invention, a mixed video image that includes a video image from a video source and at least one OSD block is generated. Thereafter, the mixed video image is displayed on a display screen to thereby eliminate a residual image on the display screen and the at least one OSD block is scanned to different positions on an active image portion of the display screen. In a progressive scanning mode, the OSD block is progressively scanned across the active image portion. On the other hand, in a random scanning mode the at least one OSD block is randomly moved to different locations on the active image portion of the display screen for a predetermined period of time.
Abstract:
Disclosed is a structure of a downlink common channel for transmitting an ACK/NACK to notify whether retransmission should be performed through a transmission position of the downlink common channel according to a channel code of a time slot allocated to a UE, and a method for distinguishing an ACK from a NACK, in using a HARQ scheme for uplink transmission of a TDD CDMA scheme in a 3G mobile communication.
Abstract:
An etching apparatus and method of etching, the etching apparatus comprises a gas injector injecting reaction gas into a chamber in which semiconductor wafer is accommodated. The gas injector comprises at least a pair of gas suppliers having a gas supplying hole and a gas distributor having a loop-typed upper partition wall protruding from a central zone of an upper side of a plate, and a loop-typed bottom partition wall protruding from a central zone of a bottom side of the plate. A showerhead is disposed having a gap with the gas distributor, and injecting the reaction gas into the chamber. The etching apparatus independently controls an amount of reaction gas injected into a central zone and an edge zone of a chamber when the reaction gas is injected into the chamber, thereby controlling uniformity of density of plasma, deposition speed, etching speed, and the like in the etching process.
Abstract:
The present invention provides a macroporous foam comprising microporous zeolite or zeotype material and preparation thereof, which comprises dipping a polymeric template capable of releasing an amine which has a sponge or macroporous structure and can be selected from a group consisting of polyurethane, polyamides, aromatic or aliphatic polyimides, polyamideimides, epoxy resins having an amine skeleton, and polymeric materials capable of releasing an organic amine by hydrolysis, in an alkaline or acidic solution, gel or sol of a precursor of said zeolite or zeotype material, and reacting the resultant at a suitable temperature for a period such that all or almost all of the polymeric template can be replaced with zeolite or zeotype material. Said foam comprising zeolite or zeotype material has the outer shape and size and the inner sponge or macroporous structure which are the same or similar to those of the polymeric template used.
Abstract:
External address signals are applied to an integrated circuit in a burn-in test mode. The external address signals control the voltage levels of adjacent main word lines in a memory array in the integrated circuit. The adjacent main word lines may thereby be configured in to be in opposing logic states. The opposing logic states may provide a potential difference between the adjacent main word lines, thereby increasing the likelihood of detecting microbridges between the adjacent main word lines formed during fabrication of the integrated circuit. The reliability of the integrated circuit may thereby be improved.