Abstract: A method and apparatus for recording time information for received digital data streams are provided. The method includes recording first time information and second time information on a recording medium. The first time information is part of management data for managing presentation data and the second time information is time information of the presentation data. The format of the first time information coincides with the format of the second time information.

Abstract: Method and apparatus for recording digital data transport stream units such as application packets in sectors of a disk type recording medium such as a digital versatile disk and create and record management information for the recorded transport stream units. In case that a single transport stream unit is divided and then recorded across two sectors, header information of the preceding sector including management information which is created corresponding to each transport stream unit is generated, and the size of the header information and transport stream units to be recorded in the preceding sector is compared with the size of a sector. If the size difference is 1 byte, an invalid header data distinguishable from normal application header extension information is inserted to maintain the correspondence between each transport stream unit to be recorded in the preceding sector and its management information.

Abstract: A method and apparatus for recording time information for received digital data streams to be recorded on a recording medium such as a digital video disk and searching the recorded digital data streams using the time information. The format of the time information is the same as that of the time data in the navigation information and the time information is used as the low-unit time value of the arrival time of data stream in the case of data search. The error in the start position of each stream object unit, resulting from insufficient resolution of the packet arrival time format, is corrected without additional information indicative of the offset between the start time of a stream object unit and the time value obtained from incremental arrival time information, thereby enabling precise and fast data search capability and increasing recording efficiency.

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. The method for reproducing data from a recording medium includes receiving an access time for accessing data from the recording medium, searching for a target entry point based on the access time by using access time entries, and searching for a target object unit by using the target entry point and object unit entries. The access time entries and the object unit entries are management information stored on the recording medium.

Abstract: A recording medium with the increased recording efficiency is provided. Depending upon the size of the remaining area of a sector, a transport stream unit is recorded across two sectors with the result that sectors contain no null data. If the size of the remaining area of the last sector of a stream object unit is less than the size of a transport stream unit, the remaining area is padded with null data.

Abstract: This invention provides a method of creating and recording presentation order management information for a rewritable recording medium, which enables effective control of the amount of the presentation order management information needed when a user edits preferred play lists of recorded data. In the present invention, each time a new play list is made by a user, a user-defined program chain is created, wherein presentation order information units for defining presentation order of user-chosen data are contained. The maximum number of user-defined program chains and the total number of presentation order information units are limited. When editing of a new play list is requested, the number of user-defined program chains created so far and the total number of presentation order information units contained in all the user-defined program chains are checked.

Abstract: This invention provides a method for creating/writing defect management information of an information recording medium and an apparatus and optical disc based on the method. In the present invention, it depends on the type of data to be reproduced whether or not defective sectors which are detected during reproduction operation are replaced with non-defective sectors. If read-out errors are detected in reproducing non-audio/video data, linear replacement algorithm is applied to the corresponding defective sectors. On the other hand, in case of audio/video data, location information of the corresponding defective sectors is just kept without any sector replacement. Therefore, this invention enables to reproduce audio/video data in real-time regardless of the presence of defective sectors and to avoid writing data to the defective sectors when new data is overwritten to the information recording medium.

Abstract: The present invention relates to a nuclear fuel body comprising tungsten network and a method for manufacturing the same, more particularly, a nuclear fuel body in which tungsten network is continuously formed over the entire or some parts of a sintered body and a method for manufacturing the same. The sintered body in the nuclear fuel body of the present invention contains tungsten network having excellent heat conductivity, leading to the enhancement of heat conductivity of the nuclear fuel sintered body itself with decreasing the temperature of the nuclear fuel, so that it can contribute to the improvement in safety and performance of nuclear fuel.

Abstract: A rewritable recording medium and a system for creating or recording presentation order information for the recording medium are disclosed. The rewritable recording medium includes (a) a data area in which a data file is recorded, and (b) a navigation information area in which a navigation information file is recorded. The navigation information file includes a plurality of presentation order information units for defining a data presentation sequence and a plurality of presentation order information groups each of which including at least one of the presentation order information units. Recording of new data is permitted only when the total number of the presentation order information units for all the presentation order information groups is less than a predetermined value.

Abstract: A recording medium, method and apparatus for recording digital data streams are provided. The method includes recording a received digital data stream of data packet units by grouping the data packet units into program units, and creating and recording entry information pertaining to entry points of the digital data stream.

Abstract: A recording medium with the increased recording efficiency is provided. Depending upon the size of the remaining area of a sector, a transport stream unit is recorded across two sectors with the result that sectors contain no null data. If the size of the remaining area of the last sector of a stream object unit is less than the size of a transport stream unit, the remaining area is padded with null data.

Abstract: A recording medium, method and apparatus for providing management information are provided. The method includes grouping data of a digital data stream into a plurality of object units, and creating map information for accessing the data, wherein the map information includes time information and object unit information associated with the object units.

Abstract: A method for recording digital data streams capable of increasing recording efficiency of a recording medium by recording a transport stream unit across two sectors. Depending upon the size of the remaining area of a sector, a transport stream unit is recorded across two sectors with the result that sectors contain no null data. If the size of the remaining area of the last sector of a stream object unit is less than the size of a transport stream unit, the remaining area is padded with null data. The method for recording digital data streams in accordance with the present invention minimizes the size of the recording area padded with null data, thereby remarkably increasing the recording efficiency of a recording medium.

Abstract: This invention provides a method for creating/writing defect management information of an information recording medium and an apparatus and optical disc based on the method. In the present invention, it depends on the type of data to be reproduced whether or not defective sectors which are detected during reproduction operation are replaced with non-defective sectors. If read-out errors are detected in reproducing non-audio/video data, linear replacement algorithm is applied to the corresponding defective sectors. On the other hand, in case of audio/video data, location information of the corresponding defective sectors is just kept without any sector replacement. Therefore, this invention enables to reproduce audio/video data in real-time regardless of the presence of defective sectors and to avoid writing data to the defective sectors when new data is overwritten to the information recording 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: The present invention relates to a method for measuring the content of Lanthanides dissolved in uranium oxide, wherein the Lanthanides content in the nuclear fuel pellet is measured using the thermo gravimetric analysis which measures the weight variation caused by the oxidation and heat treatment of the nuclear fuel pellet. This method provides an advantage in that the Lanthanide content can be measured using relatively simple equipments such as an electric furnace and a balance.

Abstract: This invention provides a method for managing navigation data for a rewritable recording medium, which are referred to for control of recording, editing, and reproduction. This method enables 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. Management data, which are relevant to the data to be recorded to the rewritable recording medium and are created and written to the relevant information tables, 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. Subsequently, the data are read out from the rewritable recording medium and reproduced in reference to the management data.

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: This invention provides a method for creating/writing defect management information of an information recording medium and an apparatus and optical disc based on the method. In the present invention, it depends on the type of data to be reproduced whether or not defective sectors which are detected during reproduction operation are replaced with non-defective sectors. If read-out errors are detected in reproducing non-audio/video data, linear replacement algorithm is applied to the corresponding defective sectors. On the other hand, in case of audio/video data, location information of the corresponding defective sectors is just kept without any sector replacement. Therefore, this invention enables to reproduce audio/video data in real-time regardless of the presence of defective sectors and to avoid writing data to the defective sectors when new data is overwritten to the information recording medium.

Abstract: This invention provides a method for creating/writing defect management information of an information recording medium and an apparatus and optical disc based on the method. In the present invention, it depends on the type of data to be reproduced whether or not defective sectors which are detected during reproduction operation are replaced with non-defective sectors. If read-out errors are detected in reproducing non-audio/video data, linear replacement algorithm is applied to the corresponding defective sectors. On the other hand, in case of audio/video data, location information of the corresponding defective sectors is just kept without any sector replacement. Therefore, this invention enables to reproduce audio/video data in real-time regardless of the presence of defective sectors and to avoid writing data to the defective sectors when new data is overwritten to the information recording medium.