Abstract: Provided is a concentration measuring device which includes: a main pipe through which a fluid whose concentration is to be measured flows; a flow cell having a fluid passage and a light passage formed to pass through the fluid passage; a spectrometer capable of measuring absorbance for each wavelength of the source light transmitted to the flow cell and the received light receiving from the flow cell; and an optical cable connecting the flow cell and the spectrometer with each other, wherein the flow cell is separated from the main pipe to be provided separately, and a fluid pipe is connected to the flow cell, so that the fluid flows from the main pipe to the flow cell through the fluid pipe using a pitot tube.

Abstract: A technology related to a method and apparatus for providing a relation note using correlation is disclosed. The method for providing the relation note, which is performed by a relation note providing server interworking with a user terminal, comprises the steps of: receiving one or more generated notes from the user terminal; updating, according to a configurable reference, correlation between notes indicating a relation between the one or more notes; and providing the one or more notes to the user terminal on the basis of the correlation between the notes. Therefore, the method may provide a user interface which is intelligent and smart to enable a plurality of notes to be more effectively identified and managed on the basis of the correlation.

Abstract: A technology related to a method and apparatus for providing a relation note using correlation is disclosed. The method for providing the relation note, which is performed by a relation note providing server interworking with a user terminal, comprises the steps of: receiving one or more generated notes from the user terminal; updating, according to a configurable reference, correlation between notes indicating a relation between the one or more notes; and providing the one or more notes to the user terminal on the basis of the correlation between the notes. Therefore, the method may provide a user interface which is intelligent and smart to enable a plurality of notes to be more effectively identified and managed on the basis of the correlation.

Abstract: A technology related to a method and apparatus for providing a relation note using correlation is disclosed. The method for providing the relation note, which is performed by a relation note providing server interworking with a user terminal, comprises the steps of: receiving one or more generated notes from the user terminal; updating, according to a configurable reference, correlation between notes indicating a relation between the one or more notes; and providing the one or more notes to the user terminal on the basis of the correlation between the notes. Therefore, the method may provide a user interface which is intelligent and smart to enable a plurality of notes to be more effectively identified and managed on the basis of the correlation.

Abstract: A technology related to a method and apparatus for providing a relation note using correlation is disclosed. The method for providing the relation note, which is performed by a relation note providing server interworking with a user terminal, comprises the steps of: receiving one or more generated notes from the user terminal; updating, according to a configurable reference, correlation between notes indicating a relation between the one or more notes; and providing the one or more notes to the user terminal on the basis of the correlation between the notes. Therefore, the method may provide a user interface which is intelligent and smart to enable a plurality of notes to be more effectively identified and managed on the basis of the correlation.

Abstract: A computer system includes a DRM client system in which a plurality of DRM clients are installed, comprising: a virtual OS managing unit that separates a kernel of an actual operating system installed in the DRM client system to generate and manage a virtual operating system; a branch process information managing unit that manages branch process information according to a type of a document that a user attempts to read; and an application program branching unit that analyzes the branch process information and executes DRM client agent for managing the DRM client in an actual OS region or a virtual OS region according to the type of a document that the user attempts to read to allow the user to read the document.

Abstract: The present invention relates to a system and method for preventing a DRM client crash using process separate execution in a case where a plurality of DRM clients are used in a single PC. The system for preventing a DRM client crash using process separate execution is characterized by a system for preventing a DRM client crash in a PC in which a plurality of different DRM clients are installed, including: a virtual OS managing unit that separates a kernel of an actual operating system installed in the PC to generate and manage a virtual operating system; a branch process information managing unit that manages branch process information according to the type of a document that a user attempts to read; and an application program branching unit that analyzes the branch process information and executes an application program in a designated OS region according to the type of a document that the user attempts to read to allow the user to read the document.