Abstract: A solid electrolyte membrane for a solid-state battery and a battery comprising the same is provided. The battery may comprise lithium metal as a negative electrode active material. The solid electrolyte membrane comprises an inhibiting layer, which is preferably capable of inhibiting growth of lithium dendrite, because it includes an effective amount of a dendrite growth-inhibiting material, which is capable of ionizing lithium deposited in the form of metal. Thus, when lithium metal is used as a negative electrode for a solid-state battery comprising the solid electrolyte membrane, it is possible to delay and/or inhibit growth of lithium dendrite, and thus to effectively prevent an electrical short-circuit caused by dendrite growth.

Abstract: The present disclosure relates to an electrode for an all solid-state battery and a manufacturing method thereof, and a mixture of a polymer-based solid electrolyte and a conductive material is filled between electrode active material particles that constitute an electrode active material layer, to increase the contact between the electrode active material particles and the conductive material through a solvent annealing process included in a manufacturing process, thereby improving ionic conductivity in the electrode and capacity in the electrode.

Abstract: A variable capacity swash plate type compressor includes: a cylinder block forming a plurality of cylinder bores; a first housing connected to the cylinder block and forming a crank chamber; a second housing; a drive shaft; a rotor mounted on the drive shaft to rotate with the drive shaft; a swash plate connected to the rotor by a hinge mechanism to rotate together with the rotor; and a plurality of pistons that are respectively disposed in the plurality of the cylinder bores and are connected the swash plate to undergo a linear reciprocating motion by a rotational motion of the swash plate. The hinge mechanism includes: a guide groove provided in the rotor; a connecting arm connected to the swash plate and having a cylindrical receiving space; and a cylindrical guide roller that is disposed in the receiving space in a state of being arranged in the guide groove.

Abstract: Proposed is a hybrid rocket engine using an electric motor-driven oxidizer pump, the hybrid rocket engine including: an oxidizer tank configured to store the oxidizer; an oxidizer pump configured to pressurize the oxidizer by being connected to the oxidizer tank through a first oxidizer supply line; a drive unit including an electric motor configured to drive the oxidizer pump and a battery configured to supply power to the electric motor; an auxiliary oxidizer line configured to guide the oxidizer from the oxidizer tank to the electric motor to cool the electric motor; an oxidizer recirculation line configured to recharge oxidizer vapor, generated through heat exchange between the electric motor and the oxidizer, to the oxidizer tank, thereby pressurizing an inner side of the oxidizer tank; and a combustion chamber configured to combust the oxidizer and fuel by being connected to the oxidizer pump through a second oxidizer supply line.

Abstract: Provided is a rocket for artificial rainfall using an ejection hygroscopic flare, the rocket including: a rocket body configured to descend with a parachute after flight by thrust, and having a hygroscopic flare discharge outlet; a communication module installed in the rocket body, and configured to transmit and receive a launch command and an ejection command with a ground station; an ejection hygroscopic flare installed in the rocket body and filled with cloud seeds and a burning material therein; and a hygroscopic flare ejection device configured to separate and eject the ejection hygroscopic flare from an inside of the rocket body to an outside thereof.

Abstract: Provided is a rocket for artificial rainfall using an ejection hygroscopic flare, the rocket including: a rocket body configured to descend with a parachute after flight by thrust, and having a hygroscopic flare discharge outlet; a communication module installed in the rocket body, and configured to transmit and receive a launch command and an ejection command with a ground station; an ejection hygroscopic flare installed in the rocket body and filled with cloud seeds and a burning material therein; and a hygroscopic flare ejection device configured to separate and eject the ejection hygroscopic flare from an inside of the rocket body to an outside thereof.

Abstract: Proposed is a hybrid rocket engine using an electric motor-driven oxidizer pump, the hybrid rocket engine including: an oxidizer tank configured to store the oxidizer; an oxidizer pump configured to pressurize the oxidizer by being connected to the oxidizer tank through a first oxidizer supply line; a drive unit including an electric motor configured to drive the oxidizer pump and a battery configured to supply power to the electric motor; an auxiliary oxidizer line configured to guide the oxidizer from the oxidizer tank to the electric motor to cool the electric motor; an oxidizer recirculation line configured to recharge oxidizer vapor, generated through heat exchange between the electric motor and the oxidizer, to the oxidizer tank, thereby pressurizing an inner side of the oxidizer tank; and a combustion chamber configured to combust the oxidizer and fuel by being connected to the oxidizer pump through a second oxidizer supply line.

Abstract: A variable capacity swash plate type compressor includes: a cylinder block forming a plurality of cylinder bores; a first housing connected to the cylinder block and forming a crank chamber; a second housing; a drive shaft; a rotor mounted on the drive shaft to rotate with the drive shaft; a swash plate connected to the rotor by a hinge mechanism to rotate together with the rotor; and a plurality of pistons that are respectively disposed in the plurality of the cylinder bores and are connected the swash plate to undergo a linear reciprocating motion by a rotational motion of the swash plate. The hinge mechanism includes: a guide groove provided in the rotor; a connecting arm connected to the swash plate and having a cylindrical receiving space; and a cylindrical guide roller that is disposed in the receiving space in a state of being arranged in the guide groove.

Abstract: Provided is a method for controlling a cascade boiler system, and the method includes a) operating the number of boilers set in an initial operation state, b) detecting a supply water temperature and a returned water temperature of the primary side of the hydro-separator and a supply water temperature and a returned water temperature of the secondary side, and calculating a flow rate corrected by the hydro-separator using the detected temperatures, c) calculating a set temperature serving as the supply water temperature of the primary side that is able to maintain the supply water temperature of the secondary side when the supply water temperature of the secondary side is within a set range of a target temperature while maintaining the initial operation state, and d) calculating the number of boilers that are able to maintain the calculated set temperature, and controlling an operation of the boilers according to the number.

Abstract: Provided is a method for controlling a cascade boiler system, and the method includes a) operating the number of boilers set in an initial operation state, b) detecting a supply water temperature and a returned water temperature of the primary side of the hydro-separator and a supply water temperature and a returned water temperature of the secondary side, and calculating a flow rate corrected by the hydro-separator using the detected temperatures, c) calculating a set temperature serving as the supply water temperature of the primary side that is able to maintain the supply water temperature of the secondary side when the supply water temperature of the secondary side is within a set range of a target temperature while maintaining the initial operation state, and d) calculating the number of boilers that are able to maintain the calculated set temperature, and controlling an operation of the boilers according to the number.