Abstract: The present invention relates to: a polycarbonate resin composition that is for 3D printing and has excellent shape retention ability and interfacial adhesion; and a pellet for 3D printing and filament for 3D printing, wherein the pellet and filament contain the polycarbonate resin composition. More specifically, the present invention relates to a polycarbonate resin composition for 3D printing, and a pellet and a filament that are for 3D printing and comprise the polycarbonate resin composition, wherein the polycarbonate resin composition comprises a specific combination of a polycarbonate (PC) resin, a polybutylene terephthalate (PBT) resin, a carbon black master batch, and a carbon fiber, retains the excellent mechanical properties of the polycarbonate resin, and has an excellent balance of particular properties, such as shape retention ability and interfacial adhesion, required of 3D printing filaments.

Abstract: A multilayer electronic component includes a dielectric layer and internal electrodes; wherein the dielectric layer includes a rare earth element, Mn, and Ti. The rare earth element includes a first rare earth element including Dy and Tb, and a second rare earth element including a rare earth element different from the first rare earth element. The number of moles of the rare earth element is defined as RE, the number of moles of Dy is defined as A1, the number of moles of Tb is defined as A2 based on 100 moles of Ti included in the dielectric layer, and 0.5 mol?RE?0.9 mol and 1<A2/A1 are satisfied. The number of moles of the second subcomponent element based on 100 moles of Ti included in the dielectric layer is 0.2 mole or more and 0.5 mole or less.

Abstract: An apparatus for calculating an estimate for installation of a water heater according to an embodiment of the present invention may include an image analysis unit for analyzing a water heater region image including at least one of a previously-installed water heater main body, a previously-installed pipe connected to the previously-installed water heater main body for fluid flow, and a room controller for controlling a water heater, and a processing unit for calculating estimate required for the installation of a water heater to be installed on the basis of at least one of information about the model of the water heater to be installed and required dimensions of a pipe to be installed obtained on the basis of an analysis result of the image analysis unit.

Abstract: The present invention provides a combined heating and hot-water boiler for heating and hot-water. The combined heating and hot-water boiler comprises: a main heat exchanger which heats heating water through heat exchange; a hot-water heat exchanger to which the heating water heated by the main heat exchanger is supplied, and which heats tap water into hot water through heat exchange with the heating water; and a control unit which controls the flow of the heating water having passed through the hot-water heat exchanger to control the formation of at least one of a first flow path for supplying, to an object to be heated, the heating water having passed through the hot-water heat exchanger, and a second flow path for supplying, to the main heat exchanger, the heating water having passed through the hot-water heat exchanger.

Abstract: The present invention provides a combined heating and hot-water boiler for heating and hot-water. The combined heating and hot-water boiler comprises: a main heat exchanger which heats heating water through heat exchange; a hot-water heat exchanger to which the heating water heated by the main heat exchanger is supplied, and which heats tap water into hot water through heat exchange with the heating water; and a control unit which controls the flow of the heating water having passed through the hot-water heat exchanger to control the formation of at least one of a first flow path for supplying, to an object to be heated, the heating water having passed through the hot-water heat exchanger, and a second flow path for supplying, to the main heat exchanger, the heating water having passed through the hot-water heat exchanger.

Abstract: The objective of the present invention is to provide a combustion device capable of informing an amount of used gas, in which an air of gas temperature is reflected, to a user and a method of measuring the amount of used gas. To this end, the combustion device includes: a burner configured to burn gas; a blower configured to supply air for combustion to the burner; gas valves configured to supply gas for combustion to the burner; a gas temperature sensor configured to measure a temperature of gas supplied to the burner or the blower; and a control unit configured to control the number of revolutions of the blower, calculate a first amount of used gas for a present operating heat quantity burned according to a signal input by a user, and compensate the calculated first amount of used gas with a measured gas temperature measured by the gas temperature sensor to calculate a second amount of used gas.

Abstract: An apparatus for calculating an estimate for installation of a water heater according to an embodiment of the present invention may include an image analysis unit for analyzing a water heater region image including at least one of a previously-installed water heater main body, a previously-installed pipe connected to the previously-installed water heater main body for fluid flow, and a room controller for controlling a water heater, and a processing unit for calculating estimate required for the installation of a water heater to be installed on the basis of at least one of information about the model of the water heater to be installed and required dimensions of a pipe to be installed obtained on the basis of an analysis result of the image analysis unit.

Abstract: The objective of the present invention is to provide a boiler system for bath heating and hot water that is capable of performing heating and hot water preheating by using a single circulation pump for both without the need to separately include a circulation pump for heating and a circulation pump for hot water preheating.

Abstract: Provided is a method for measuring the temperature at each location of a pipe in a hot water supply system comprising a water heater, a pipe, and outlets, the method comprising checking for a temperature of a first point (TP1), which is upstream of the outlet, a temperature of a second point (TP2), which is downstream of the outlet and an outdoor temperature (TA), and confirming a length (L) of the pipe from the first point to the second point, then measuring a temperature of the pipe located at a distance of x away from the first point.

Abstract: A method of using two display panels as a single screen is provided. More particularly, a structure for minimizing the size of a joint between two display panels and an algorithm for coping with a situation where a text line or a text image is located at the joint are provided. A portable display device has at least two panel housings and first and second display panels mounted on the panel housings, respectively, in which the display panels are joined to each other to form a single screen when the panel housings are unfolded. When a text line or a text image is located at the joint between the first and second display panels, a screen is shifted so that the joint is located in a space between the text lines.

Abstract: The objective of the present invention is to provide a combustion device capable of informing an amount of used gas, in which an air of gas temperature is reflected, to a user and a method of measuring the amount of used gas. To this end, the combustion device includes: a burner configured to burn gas; a blower configured to supply air for combustion to the burner; gas valves configured to supply gas for combustion to the burner; a gas temperature sensor configured to measure a temperature of gas supplied to the burner or the blower; and a control unit configured to control the number of revolutions of the blower, calculate a first amount of used gas for a present operating heat quantity burned according to a signal input by a user, and compensate the calculated first amount of used gas with a measured gas temperature measured by the gas temperature sensor to calculate a second amount of used gas.

Abstract: Provided is a method for measuring the temperature at each location of a pipe in a hot water supply system comprising a water heater, a pipe, and outlets, the method comprising checking for a temperature of a first point (TP1), which is upstream of the outlet, a temperature of a second point (TP2), which is downstream of the outlet and an outdoor temperature (TA), and confirming a length (L) of the pipe from the first point to the second point, then measuring a temperature of the pipe located at a distance of x away from the first point.

Abstract: A hot water supply apparatus of the present invention includes: a direct water inlet pipe into which direct water is introduced; a heat exchanger for heating direct water introduced through the direct water inlet pipe with combustion heat of a burner; a hot water supply pipe for discharging the hot water heated in the heat exchanger; a bypass pipe connected between the direct water inlet pipe and the hot water supply pipe so as to mix a part of the direct water introduced through the direct water inlet pipe with the hot water discharged through the hot water supply pipe; and a pressure reducing valve provided on the bypass pipe and configured to reduce the pressure of water passing through the inside of the bypass pipe to supply the water to the hot water supply pipe when hot water is supplied.

Abstract: A method for controlling a parallel operation of a multi-water heater in which a plurality of water heaters are connected to each other in parallel, according to the present invention, comprises: measuring the temperature of direct water that flows into the multi-water heater; sensing a set temperature set by a user; calculating a temperature difference between the set temperature and the direct water temperature; and changing a reference value to additionally operate or stop each water heater according to the calculated temperature difference, thereby efficiently operate the multi-water heater even though the circumstance and conditions of use are changed.

Abstract: An event processing method includes receiving an event from an event source and identifying an event population and non-event population based on the received event, such that the event population includes a plurality of events and the non-event population includes a plurality of non-events. The method further includes identifying an event feedback group from the events of the identified event population, such that the event feedback group identifies a number of events of the identified event population that have performed a required operation, and determining a ratio of event feedback, the ratio of the event feedback being a ratio of the number of events identified by the event feedback group to a number of the events of the identified event population.

Abstract: The present invention provides a method of producing D-type lactide from liquid D-type lactic acid, and a method for producing D-type polylactic acid having a weight average molecular weight of about 50,000˜20,000 g/mol from the produced D-type lactide. The method of the present invention is advantageous in that D-type lactide can be obtained at a high yield by a simple method, compared to the conventional production methods. Consequently, production cost of D-type polylactic acid that is finally obtained from D-type lactide can be reduced.

Abstract: The present disclosure relates to a method for producing glucaric acid, and more particularly, to a method for producing glucaric acid including the steps of: (1) inputting aldohexose and potassium hydroxide to an aqueous solution; and (2) deriving a catalytic oxidation reaction after adding a supported noble metal catalyst to the aqueous solution under the presence of oxygen gas.

Abstract: Disclosed are an air proportional control type combustion device and a method for adjusting the heat amount thereof. The combustion device according to the present invention, which controls the output heat amount by controlling the RPM of a blower, is capable of compensating for an air flow rate with respect to external circumstances such as place of installation, blocking of a gas duct, and seasonal changes, or the RPM of the blower caused by such situational changes. In a case where there is a difference between air pressure (Act. APS) measured after the blower is driven at a reference RPM (Ref. RPM) in a state where gas supply is blocked and reference air pressure (Ref. RPM), the combustion device compensates for the difference while causing the RPM to vary and applies the varied RPM as a new reference RPM.

Abstract: A method of writing data in a non-volatile memory device includes receiving a program command and a first row address corresponding to a first word line; performing a first partial programming operation with respect to first memory cells coupled to the first word line; performing a second partial programming operation with respect to second memory cells coupled to a second word line adjacent to the first word line; performing a first verification operation by verifying the first partial programming operation; and selectively performing a first additional programming operation with respect to the first memory cells depending on a result of the first verification operation.

Abstract: Disclosed is a method for preparing lactide by using a solvent. According to the method, since an ionic liquid is used as a solvent in a second step in the course of preparing lactide, it is possible to secure mobility of the resulting reactant, and decrease a reaction temperature. In addition, the ionic liquid absorbs moisture generated during the reaction, and thus prevents degradation of lactide which is susceptible to moisture. Furthermore, to the present method allows for the preparation of lactide successively through the continuous supply of lactic acid oligomers. Because the use of an ionic liquid minimizes the contamination of a reactive group with by-products, the use of a solvent for reactor washing is unnecessary. Further, owing to a high boiling point of the ionic liquid, the ionic liquid can be easily harvested and recycled.