Abstract: An embodiment of the present specification provides a method for preparing a catalyst for preparing a carbon nanotube, comprising: (a) dissolving a main catalyst precursor, a support precursor, a cocatalyst precursor and a precipitation inhibitor in a solvent to prepare a precursor solution; and (b) pyrolyzing the precursor solution by spraying the precursor solution into a reactor, wherein a mole fraction of the precipitation inhibitor to the cocatalyst precursor is 0.1 to 1.5.

Abstract: Proposed is a filter assembly. The filter assembly includes: a housing configured to form a flow path for allowing a fluid to move in a first direction or a second direction opposite to the first direction; a plate inserted into the housing and formed therein with through-holes; and a plurality of protrusions protruding from the plate in the second direction.

Abstract: The present invention relates to an apparatus for generating data quality information of electric power equipment, the apparatus including a data collector configured to collect a piece of measured data of electric power equipment, a storage configured to store a previous value and a set value for the piece of measured data, and a quality value generator configured to generate a quality value for the piece of measured data by applying the piece of measured data, the previous value, and the set value to a predetermined logic circuit.

Abstract: The present invention relates to an apparatus for generating data quality information of electric power equipment, the apparatus including a data collector configured to collect a piece of measured data of electric power equipment, a storage configured to store a previous value and a set value for the piece of measured data, and a quality value generator configured to generate a quality value for the piece of measured data by applying the piece of measured data, the previous value, and the set value to a predetermined logic circuit.

Abstract: The present invention relates to a device and a method for calculating stability and predicting an error of a power system network, the device comprising: a standard object information reception unit for receiving standard object information provided by a power system network; a connection state stability calculation unit for calculating connection state stability (Sstate) using the standard object information; a connection time stability calculation unit for calculating connection time stability (Stime) using the standard object information; a network connection stability calculation unit for calculating a final network connection stability using the network connection state stability (Sstate) and the connection time stability (Stime); and an error prediction information display unit for displaying error prediction information including at least one of network path information, a network state value, the final network connection stability, the connection state stability (Sstate), and the connection time stab

Abstract: Disclosed herein are an apparatus and method for detecting abnormal behavior in a main device and a terminal device, included in a control network, using a whitelist. The apparatus for detecting abnormal behavior includes an information collection unit for collecting system information about the main device and system information about the terminal device and a detection unit for detecting abnormal behavior in the main device and the terminal device by comparing a whitelist with system information that includes the system information about the main device and the system information about the terminal device, wherein the whitelist includes a process whitelist, a file whitelist, and a network whitelist.

Abstract: The system for providing information on the current state of business of the local goods or services provider comprises: a power consumption information collection unit for collecting power consumption information of the local goods or services provider; a power consumption information analysis unit for analyzing the power consumption information, and extracting a feature of an amount of power consumption of the local goods or services provider; and a business open-or-closed determination unit for determining whether the local goods or services provider is open for business at a predetermined point in time, on the basis of the feature of the amount of power consumption of the local goods or services provider, and providing information on whether the local goods or services provider is open for business.

Abstract: Disclosed herein are an apparatus and method for detecting abnormal behavior in a main device and a terminal device, included in a control network, using a whitelist. The apparatus for detecting abnormal behavior includes an information collection unit for collecting system information about the main device and system information about the terminal device and a detection unit for detecting abnormal behavior in the main device and the terminal device by comparing a whitelist with system information that includes the system information about the main device and the system information about the terminal device, wherein the whitelist includes a process whitelist, a file whitelist, and a network whitelist.

Abstract: Provided is a ball check valve apparatus including: a first body into which wastewater is introduced; a second body coupled to the first body to be communicated with the first body and configured to discharge the wastewater introduced into the first body; and a valve member disposed in the first body such that the valve member is movable up and down in the first body and configured to close an opening/closing hole formed in the first body by a self-weight thereof and open the opening/closing hole by a pressure of wastewater introduced through the opening/closing hole.

Abstract: The present invention relates to a device and a method for calculating stability and predicting an error of a power system network, the device comprising: a standard object information reception unit for receiving standard object information provided by a power system network; a connection state stability calculation unit for calculating connection state stability (Sstate) using the standard object information; a connection time stability calculation unit for calculating connection time stability (Stime) using the standard object information; a network connection stability calculation unit for calculating a final network connection stability using the network connection state stability (Sstate) and the connection time stability (Stime); and an error prediction information display unit for displaying error prediction information including at least one of network path information, a network state value, the final network connection stability, the connection state stability (Sstate), and the connection time stab

Abstract: The present invention relates to a system and method for unidirectional data transmission. Data is unidirectionally transmitted from a network having a higher security level to a network having a lower security level and a corresponding data verification result is received through a separate line. Hence, it is possible not only to physically block access to the network having a higher security level from the network having a lower security level but also to improve reliability of data delivery by appropriately handling packet loss and bit errors that may occur during data transmission.

Abstract: Provided is a ball check valve apparatus including: a first body into which wastewater is introduced; a second body coupled to the first body to be communicated with the first body and configured to discharge the wastewater introduced into the first body; and a valve member disposed in the first body such that the valve member is movable up and down in the first body and configured to close an opening/closing hole formed in the first body by a self-weight thereof and open the opening/closing hole by a pressure of wastewater introduced through the opening/closing hole.

Abstract: The present invention relates to a system and method for unidirectional data transmission. Data is unidirectionally transmitted from a network having a higher security level to a network having a lower security level and a corresponding data verification result is received through a separate line. Hence, it is possible not only to physically block access to the network having a higher security level from the network having a lower security level but also to improve reliability of data delivery by appropriately handling packet loss and bit errors that may occur during data transmission.

Abstract: Disclosed is an automatic gas intake and exhaust valve device including a main body part having an orifice hole at one side and an intake and exhaust hole at an opposite side, an opening/closing member movably inserted into the main body part to open/close the intake and exhaust hole, and a coupling member extending along one side of the main body part to couple the main body part with a pipe in the communication state of the pipe. The opening/closing member floats according to a flow velocity of a fluid introduced into the main body part and discharged out of the main body part, to close the intake and exhaust hole, and drops down to the bottom of the main body part by a weight of the opening/closing member to open the intake and exhaust hole if a fluid level is lowered, thereby automatically introduce and exhaust internal air of the pipe and facilities.

Abstract: Disclosed is an automatic gas intake and exhaust valve device including a main body part having an orifice hole at one side and an intake and exhaust hole at an opposite side, an opening/closing member movably inserted into the main body part to open/close the intake and exhaust hole, and a coupling member extending along one side of the main body part to couple the main body part with a pipe in the communication state of the pipe. The opening/closing member floats according to a flow velocity of a fluid introduced into the main body part and discharged out of the main body part, to close the intake and exhaust hole, and drops down to the bottom of the main body part by a weight of the opening/closing member to open the intake and exhaust hole if a fluid level is lowered, thereby automatically introduce and exhaust internal air of the pipe and facilities.