Abstract: The present invention is a perovskite metal oxide catalyst substituted with metal ions for reducing carbon deposition, a method for producing the same, and a process for performing a methane reforming reaction using this catalyst. The catalyst is produced in which Ni in ionic form is substituted at a portion of the Ti site of SrTiO3, MgTiO3, CaTiO3, or BaTiO3, which is a multi-component metal oxide having a perovskite structure. Then, various methane reforming reactions (steam-methane reforming, dry reforming of methane, catalytic partial oxidation of methane) may be efficiently and economically performed using this catalyst. The nickel-substituted perovskite metal oxide catalyst has a structure in which Ni2+ is substituted in the perovskite lattice structure. Thus, the metal oxide catalyst has advantages in that carbon deposition thereon does not occur, and thus, the catalyst has a high catalytic stability and may be used for a long time.

Abstract: The present invention relates to a perovskite metal oxide catalyst substituted with metal ions for reducing carbon deposition, a method for producing the same, and a process for performing a methane reforming reaction using this catalyst. According to the present invention, a novel type of catalyst is produced in which Ni, iron or cobalt in ionic form is substituted at a portion of the Ti site (B-site) of SrTiO3, MgTiO3, CaTiO3 or BaTiO3, which is a multicomponent metal oxide having a perovskite (ABO3) structure. Then, various methane reforming reactions (e.g., steam-methane reforming (SMR), dry reforming of methane (DRM), catalytic partial oxidation of methane (CPOM), etc.) may be efficiently and economically performed using this catalyst. The nickel-substituted perovskite metal oxide catalyst according to the present invention has a structure in which Ni2+, Co2+, Fe2+, Co3+ or Fe3+ is substituted in the perovskite lattice structure.

Abstract: A device is provided including processing circuitry configured to generate a plurality of file fragments by splitting a file stored in the device, and to determine a plurality of cloud storages used to store respective file fragments from the plurality of file fragments, wherein the plurality of cloud storages are from among cloud storages in which a user of the device is registered; and communication circuitry configured to request the plurality of cloud storages to respectively store the plurality of file fragments.

Abstract: A method of storing data includes receiving, by a network storage server, a request for transmitting a file from an external apparatus; obtaining information about a cloud storage, in which the file is stored; receiving the file from the cloud storage, based on the information about the cloud storage; and transmitting the received file to the external apparatus.

Abstract: A method of providing communication between a plurality of devices of a user without a dedicated server and a device capable of communicating with other devices by using the method are disclosed. The method includes generating a message to be sent to a second device and storing a channel file including message data in a predetermined space within a cloud server, which are performed by a first device, and accessing the cloud server and reading a channel file stored in a predetermined place within the cloud server, which are performed by the second device.

Abstract: A device is provided including processing circuitry configured to generate a plurality of file fragments by splitting a file stored in the device, and to determine a plurality of cloud storages used to store respective file fragments from the plurality of file fragments, wherein the plurality of cloud storages are from among cloud storages in which a user of the device is registered; and communication circuitry configured to request the plurality of cloud storages to respectively store the plurality of file fragments.

Abstract: A method of providing communication between a plurality of devices of a user without a dedicated server and a device capable of communicating with other devices by using the method are disclosed. The method includes generating a message to be sent to a second device and storing a channel file including message data in a predetermined space within a cloud server, which are performed by a first device, and accessing the cloud server and reading a channel file stored in a predetermined place within the cloud server, which are performed by the second device.

Abstract: A method of storing data includes receiving, by a network storage server, a request for transmitting a file from an external apparatus; obtaining information about a cloud storage, in which the file is stored; receiving the file from the cloud storage, based on the information about the cloud storage; and transmitting the received file to the external apparatus.