Abstract: A flexible printed circuit board according to an embodiment includes: a substrate; a circuit pattern disposed on the substrate; and a protective layer on the circuit pattern, wherein the circuit pattern includes a first circuit pattern and a second circuit pattern connected to a chip in a chip mounting region, a first direction that is a direction in which the circuit pattern extends and a second direction perpendicular to the first direction are defined in the substrate, the substrate includes first and second ends facing each other in the first direction and third and fourth ends facing each other in the second direction, the protective layer includes fifth and sixth ends spaced apart from ends of the substrate and facing in the first direction and seventh and eighth ends spaced apart from ends of the substrate and facing in the second direction, and an outer pattern disposed adjacent to the third end and the fourth end on the substrate, wherein the outer pattern includes: a first outer pattern and a second

Abstract: UO2 nuclear fuel pellets are fabricated by adding additive powder comprising Mn compound and Al compound into UO2 powder.

Abstract: UO2 nuclear fuel pellets are fabricated by adding additive powder comprising Mn compound and Al compound into UO2 powder.

Abstract: There is provided a method of producing U3O8 powder having large surface area and small particle size by oxidizing defective UO2 pellets and manufacturing nuclear fuel pellets which are stable in a pore structure and high in density through the use of a mixture comprising UO2 powder and U3O8 powder. The method includes producing an U308 powder having a surface area of at least 1 m2/g by oxidizing defective UO2 pellets at a temperature of 300 to 370° C. in such a way that a maximum weight increase rate per 1 g of the UO2 pellets is up to 0.06 wt %/min; producing a mixed powder by mixing the U3O8 powder with an UO2 powder by 2 to 15 wt %; producing a compact by compression molding the mixed powder; and sintering the compact in a reducing gas atmosphere at a temperature of 1600 to 1800° C. In addition, a small amount of an Al-compound may be added to the oxidized U3O8 powder before the U3O8 powder is mixed with the UO2 powder.

Abstract: This invention provides a method of managing the navigation data for a rewritable recording medium which are referred to for control of recording, editing, and reproduction. It enables to access to each information table in the navigation data directly by referring to the start address, which is kept in the first information table in the navigation data. When data are recorded to the rewritable recording medium, the management data which are relevant to the data to be recorded are created and written to the relevant information tables, which are accessed directly based on the start addresses. When data on the recording medium are reproduced, the information tables which contain management data required for reproduction of the requested data are located directly by the start addresses. Then, the data are read out from the rewritable recording medium and reproduced in reference to the management data.

Abstract: A method for manufacturing an annular nuclear fuel pellet is provided. In the method, an annular nuclear fuel green compact whose lateral cross-section is a trapezoid is prepared. The thickness of the annular nuclear fuel green compact reduces along one direction of the central axis, and a green density of the nuclear fuel green compact increases along one direction of the central axis. The annular nuclear fuel green compact is sintered under a reducing gas atmosphere so that the annular nuclear fuel pellet is obtained. According to this method, the annular pellet which has uniform inner and outer diameters and small diametric tolerances along the pellet height is fabricated without grinding the pellet surfaces.

Abstract: A recording medium according to an embodiment includes a recording layer and a transport stream recorded on the recording layer. The transport stream is composed of one or more predetermined units, each predetermined unit starting with at least one transport packet for carrying navigation information used to manage subsequent transport packets. The first packet of the at least one transport packet carries only the navigation information including program clock reference (PCR) information and does not carry presentation data.

Abstract: According to one embodiment, a method of recording a digital stream on a recording medium, includes checking an existence of entry point information in a received digital transport stream, the entry point information associated with entry points in the digital transport stream, the digital transport stream comprising a plurality of data packets; grouping received data packets into one or more data object units based on the entry point information as a result of the checking step, and grouping one or more data object units into one data object; and recording the received data packets on the basis of the data object on the recoding medium.

Abstract: This invention provides a method for creating, updating, and recording information for seamless presentation of moving picture data in a rewritable recording medium. When recording moving picture data on a rewritable recording medium, seamless presentation information, a part of navigation data, is recorded along with the picture data for seamless presentation of the recorded picture data. The method for creating and recording seamless presentation information of the present invention can effectively reduce the amount of created seamless presentation information by omitting some fields of the seamless presentation information when they are unnecessary. If some video objects of recorded picture data are erased, navigation data related to the removed video objects should be erased and seamless presentation information should also needs proper modification.

Abstract: A recording medium, method and apparatus for providing management information are provided. According to an embodiment, the method includes grouping data of a digital stream into a plurality of object units, and grouping one or more object units into an object; and creating management information for accessing the data, the management information including map information and indication information, wherein the map information includes an object unit index table associated with the object units, and wherein the indication information indicates whether the data of the digital stream are grouped into the object units on a basis of a predetermined time period or an entry point information included in the digital stream.

Abstract: A recording medium, method and apparatus for providing management information are provided. According to an embodiment, the method includes grouping data of a digital stream into a plurality of object units, and grouping one or more object units into an object; and creating management information for accessing the data, the management information including map information and indication information, wherein the map information includes an object unit index table associated with the object units, and the object unit index table includes object unit information associated with the object units, and wherein the indication information indicates whether the data of the digital stream are grouped into the object units on a basis of a predetermined time period or an entry point information included in the digital stream.

Abstract: According to an embodiment, a method of recording a digital stream on a recording medium, includes determining one of at least two recording modes to record a transmitted digital stream, wherein a first recording mode is to record data based on entry point information present in the digital stream and a second recording mode is to record data on a basis of a predetermined time; and recording the digital stream based on the determined recording mode, and recording a mode information indicating the determined recording mode.

Abstract: A method for fabricating a sintered annular nuclear fuel pellet includes: molding nuclear fuel powder or granules to fabricate an annular nuclear fuel green body; inserting a rod-like shaped structure into the annular nuclear fuel green body; sintering the rod-like shaped structure-inserted annular nuclear fuel green body in a reductive gas atmosphere; and separating the sintered annular nuclear fuel pellet from the rod-like shaped structure.

Abstract: A method for fabricating a sintered annular nuclear fuel pellet includes molding nuclear fuel powder or granule, an oxide of a fissile element (M), to fabricate an annular nuclear fuel green body. A rod-like shaped structure is inserted into the annular nuclear fuel green body and sintered in a slight oxidizing gas atmosphere such that the oxide of the fissile element has a balanced O/M ratio higher than a desired O/M ratio (oxygen/fissile element) of a final sintered annular nuclear fuel pellet, while being maintained in a cubic phase. The sintered annular nuclear fuel pellet is then reduced in a reductive gas atmosphere so as to have the desired O/M ratio in the state that the rod-like shaped structure is inserted.

Abstract: A process and system for creating and recording still picture management data in a rewritable storage media making it possible to reduce the amount of navigation information and index information necessary by grouping a plurality of still pictures according to their attributes, thus sharing navigation information and recording index information of still pictures with common attributes linked by the shared navigation information. In the method of the present invention, instead of creating navigation information and index information of each still picture, a plurality of still pictures share navigation information according to their attributes or those of audio signals linked to the still pictures and index information of the still pictures are recorded based on the shared navigation information, thereby effectively reducing the amount of navigation information and index information required for reproduction of still pictures recorded on a rewritable storage media.

Abstract: A method for manufacturing an annular nuclear fuel pellet is provided. In the method, an annular nuclear fuel green compact whose lateral cross-section is a trapezoid is prepared. The thickness of the annular nuclear fuel green compact reduces along one direction of the central axis, and a green density of the nuclear fuel green compact increases along one direction of the central axis. The annular nuclear fuel green compact is sintered under a reducing gas atmosphere so that the annular nuclear fuel pellet is obtained. According to this method, the annular pellet which has uniform inner and outer diameters and small diametric tolerances along the pellet height is fabricated without grinding the pellet surfaces.

Abstract: An optical disc and a method and apparatus for recording digital data streams and management information on the disc, are provided. The method includes recording a digital data stream including at least one predetermined-sized unit, each unit carrying header information and at least one packet, the header information being represented in at least one header entry, selectively appending an additional header entry based on whether a number of the at least one header entry corresponds to a number of the at least one packet, and recording an indication information that indicates whether or not the additional header entry is appended.

Abstract: This invention provides a method for creating, updating, and recording information for seamless presentation of moving picture data in a rewritable recording medium. When recording moving picture data on a rewritable recording medium, seamless presentation information, a part of navigation data, is recorded along with the picture data for seamless presentation of the recorded picture data. The method for creating and recording seamless presentation information of the present invention can effectively reduce the amount of created seamless presentation information by omitting some fields of the seamless presentation information when they are unnecessary. If some video objects of recorded picture data are erased, navigation data related to the removed video objects should be erased and seamless presentation information should also needs proper modification.

Abstract: In a method of producing large-grained nuclear fuel pellet, Cr-compound contained in an uranium oxide green pellet is reduced to Cr phase at 1,470° C. or below and maintained to the Cr phase, and the uranium oxide green pellet containing the Cr-compound is then sintered at 1,650° C.-1,800° C. in a gas atmosphere of oxygen potential at which Cr element in the uranium oxide green pellet becomes liquid phase.

Abstract: A method and apparatus are provided for creating and recording management information for digital data streams, and for reproducing data using the management information. According to an embodiment, the method for recording a digital data stream being received, comprising: (a) recording received stream units of a digital data stream along with their arrival time references representing the arrival times of the received stream units on a recording medium; (b) grouping the received stream units into stream object units of a predetermined size, such that the maximum search time for a stream object unit is almost uniform among the recorded stream object units; and (c) creating and recording reproduction management information regarding the stream object units.