Abstract: A method for manufacturing an electronic device including a semiconductor memory may include forming a first carbon electrode material, surface-treating the first carbon electrode material to decrease a surface roughness of the first carbon electrode material, and forming a second carbon electrode material on the treated surface of the first carbon electrode material. The second carbon electrode material may have a thickness that is greater than a thickness of the first carbon electrode material.

Abstract: Provided is a disaster warning system with active geofencing, which includes: an information collection unit for collecting real-time disaster information, real-time weather information and document information on existing disasters; a geofencing analysis unit for complexly analyzing the information to classify the scope of an area that causes a disaster damage after the disaster into caution and danger zones on a map based on geofencing, disaster situations and time series; an information generation unit for generating content for indicating the caution and danger zones on the map; and an information notification unit that provides the received content to a user mobile phone in a section set by a disaster damage prediction range, to allow the user mobile phone to indicate the caution and danger zones on the map.

Abstract: A dual-chamber fire extinguisher includes an upper chamber in which a high pressure compressed gas is stored together with an extinguishing agent, a lower chamber in which a high pressure compressed gas is stored, a cylinder section provided between the upper chamber and the lower chamber, the cylinder section having an injection hole and an orifice prior to the injection hole on the basis of a flow direction of the extinguishing agent, a piston section provided inside the cylinder section and operated to block or open the orifice, and a solenoid-type valve unit provided in the lower chamber and operated to discharge a high pressure compressed gas stored in the lower chamber.

Abstract: A dual-chamber fire extinguisher includes an upper chamber in which a high pressure compressed gas is stored together with an extinguishing agent, a lower chamber in which a high pressure compressed gas is stored, a cylinder section provided between the upper chamber and the lower chamber, the cylinder section having an injection hole and an orifice prior to the injection hole on the basis of a flow direction of the extinguishing agent, a piston section provided inside the cylinder section and operated to block or open the orifice, and a solenoid-type valve unit provided in the lower chamber and operated to discharge a high pressure compressed gas stored in the lower chamber.