摘要:
Disclosed is a method and apparatus for managing rights object of SRM in a digital rights management system. The method for managing rights object bound to the SRM, comprises: transmitting ROAP trigger from a rights issuer to a terminal; transmitting an RO request message from the terminal to the rights issuer and transmitting a response message to the RO request message from the rights issuer to the terminal; and transmitting the rights object included in the response message from a DRM agent of the terminal to a DRM agent of the SRM and installing the rights object in the SRM. Accordingly, the SRM can receive its own rights object from the rights issuer through the terminal.
摘要:
A backlight unit for a LCD panel includes a point light source circuit board, a plurality of point light sources mounted on the point light source circuit board, and an optical plate disposed on an upper part of the point light source and having a Fresnel lens formed on a planar surface the optical plate. Accordingly the back light unit has a good light emitting efficiency.
摘要:
A mesoporous oxide-catalyst complex including: a mesoporous metal oxide; and a catalyst metal supported on the mesoporous metal oxide, wherein the catalyst on the mesoporous metal oxide has a degree of dispersion of about 30 to about 90 percent.
摘要:
A semiconductor package includes one or more semiconductor chips to form a semiconductor package. The semiconductor package may include a first semiconductor chip package having a first substrate including a first surface having a center portion on which a first semiconductor chip is mounted, at least one first boundary portion on which a plurality of conductive connection pad groups are formed, and/or a molding member including a body that covers the first semiconductor chip and at least one extension that extends from the body. The extension extends while avoiding the conductive connection pad group. The semiconductor package may further include a second semiconductor chip package stacked on the first semiconductor chip package and including a second substrate on which at least one second semiconductor chip that is electrically connected to the conductive connection pad group may be mounted.
摘要:
A fuel cell stack having an improved sealing structure of a cooling plate in which the cooling plates therein each have a coolant flow channel through which a coolant flows to remove heat from the fuel cell stack and a groove that surrounds the coolant flow channel, and a sealing member disposed in the groove to prevent coolant leakage. The sealing member has a compression rate of 18 to 30%, as the compression rate being ((a thickness of the sealing member−a height of the groove)/the thickness of the sealing member)×100. Such a fuel cell stack may maintain operation for a long time without the need of supplementing the coolant.
摘要:
A direct liquid feed fuel cell stack has a structure in which membrane electrode arrays (MEAs), each having an anode electrode and a cathode electrode on either side of an electrode membrane, are stacked and a conductive anode plate and a conductive cathode plate are respectively formed to face the anode electrode and the cathode electrode, wherein the cathode plate comprises a plurality of straight flow channels in parallel, and a hydrophilic member, whose upper surface has the same plane as a bottom surface of the straight flow channel, is disposed perpendicular to the flow channels on one end of the cathode plate.
摘要:
A paper feeding device and an electronic apparatus having the same include a pickup roller moving upwardly and downwardly to selectively contact a document stacked on a document tray. A restrainer moves in directions for blocking a leading end of a document stacked on the document tray from the feeding roller when the pickup roller is lifted, and for unblocking the leading end of document from the feeding roller when the pickup roller is lowered. Accordingly, unintended contact between the document and the feeding roller is prevented when stacking the document, thereby preventing damage of the document during paper feeding.
摘要:
A direct heating cathode includes an emitter for emitting electrons and a generally W shaped heater connected at opposite ends to terminals having a flat portion on which the emitter is mounted, bent portions at opposite sides of the flat portion, and an upwardly projected shoulder portion in the vicinity of each of the ends of the heater. Each of the bent portions of the heater includes two oppositely directed bends between the flat portion and the proximate heater end. The cathode structure elevates the temperature of the cathode at the position of the emitter, reducing power consumption and improving start-up speed, operational stability, and life expectancy.
摘要:
Proposed are nuclear fuel pellets showing high oxidation resistance in a steam atmosphere and a method for manufacturing same. The method includes: preparing a powder mixture by mixing a sintering additive powder including Cr2O3, MnO, and SiO2 with a uranium dioxide powder; forming a molded body by subjecting the powder mixture to compression molding; and sintering the molded body in a weak oxidative atmosphere in which an oxygen potential is −581.9 kJ/mol to −218.2 kJ/mol. The nuclear fuel pellets contain 0.05% to 0.16% by weight of the sintering additive composed of Cr2O3, MnO, and SiO2. A liquid phase generated during the sintering accelerates grain growth and inhibits reaction between uranium dioxide with steam by forming a film at the grain boundary of the uranium dioxide. This reduces leakage of a fission material by improving high-temperature water vapor oxidation resistance at around 1204° C. in a loss-of-coolant accident condition.
摘要:
A cooling plate in which flow channels are modified to reduce temperature differences between portions of the cooling plate and provide for more uniform heat distribution within a heat generator. The flow channels of the cooling plate are formed such that a central portion of the flow channels has a greater volume than the end portions near an inlet and an outlet so that the amount of cooling water that is contained in the central portion at any one time is larger than either of the end portions near the inlet and the outlet. Likelihood of thermal deformation of the cooling plate due to thermal stress is decreased, and stability of performance of the fuel cell is increased.