Abstract: The present invention relates to a hydrogen generator, and the purpose of the present invention is to provide a hydrogen generator wherein thermal efficiency is maximized, structural changes according to amounts of production are easily implemented, and DME is used as the main source material.

Abstract: A method of predicting characteristics of concrete includes inputting data on a cement mixture including cement and an admixture, calculating reactivity of the admixture based on the data, and predicting products of the cement mixture based on the reactivity, and an embodiment further includes predicting characteristics of concrete based on the predicting of the products of the cement mixture based on the reactivity.

Abstract: The purpose of the present invention is to provide a trigeneration system using dimethyl ether (DME), wherein the system produces electricity, controls heating and cooling, and supplies carbon dioxide as a fertilizer by driving a DME engine by using, as a raw material, DME which is clean fuel. A trigeneration system using DME according to the present invention may comprise: a DME tank in which DME fuel is stored; a DME engine driven by means of the DME fuel as a raw material; a DME fuel supply unit for supplying the DME fuel stored in the DME tank to the DME engine; a treatment unit connected to an exhaust line for discharging exhaust gas from the DME engine, so as to treat harmful components of the exhaust gas; a power generation unit for producing electricity by means of a driving force of the DME engine; and a cooling and heating unit for supplying or collecting heat by means of the driving force of the DME engine.

Abstract: The purpose of the present invention is to provide a trigeneration system using dimethyl ether (DME), wherein the system produces electricity, controls heating and cooling, and supplies carbon dioxide as a fertilizer by driving a DME engine by using, as a raw material, DME which is clean fuel. A trigeneration system using DME according to the present invention may comprise: a DME tank in which DME fuel is stored; a DME engine driven by means of the DME fuel as a raw material; a DME fuel supply unit for supplying the DME fuel stored in the DME tank to the DME engine; a treatment unit connected to an exhaust line for discharging exhaust gas from the DME engine, so as to treat harmful components of the exhaust gas; a power generation unit for producing electricity by means of a driving force of the DME engine; and a cooling and heating unit for supplying or collecting heat by means of the driving force of the DME engine.

Abstract: A vehicle terminal installed in a vehicle and communicating with an external server, and a location-based content sharing system including the same are provided. The vehicle terminal includes a GPS receiving unit configured to receive location information regarding a location at which the vehicle is positioned, a wireless communication unit configured to receive information regarding a predetermined region and content corresponding to the predetermined region from the external server, a controller configured to determine whether the vehicle enters the predetermined region by using the location information, and reproduce the content corresponding to the predetermined region when the vehicle enters the predetermined region, and an output unit configured to output the reproduced content.

Abstract: A vehicle terminal installed in a vehicle and communicating with an external server, and a location-based content sharing system including the same are provided. The vehicle terminal includes a GPS receiving unit configured to receive location information regarding a location at which the vehicle is positioned, a wireless communication unit configured to receive information regarding a predetermined region and content corresponding to the predetermined region from the external server, a controller configured to determine whether the vehicle enters the predetermined region by using the location information, and reproduce the content corresponding to the predetermined region when the vehicle enters the predetermined region, and an output unit configured to output the reproduced content.