Abstract: A container-based cloud service providing system of the present disclosure includes an access server network-connected to a plurality of user terminals through a web socket; an in-memory duster having an area allocated in a cloud and storing an authentication key and event data based on a container; a server module providing a cloud service to the user terminal; a manager module managing the server module; and a database. The server module includes a security module having a container structure and performing authentication of the user terminal; a data storage module having a container structure and periodically storing the event data stored in the in-memory cluster in the database; and a service module providing the cloud service by using the event data.

Abstract: Disclosed is a method for preparing silver-copper mixed powder having a core-shell structure. The method includes: dissolving silver (Ag) and copper (Cu) in an aqueous nitric acid solution; adding a reducing agent to the solution; and preparing silver-copper mixed powder having a core-shell structure by performing plasma post-treatment, after performing the adding the reducing agent to the solution.

Abstract: A container-based cloud service providing system of the present disclosure includes an access server network-connected to a plurality of user terminals through a web socket; an in-memory duster having an area allocated in a cloud and storing an authentication key and event data based on a container; a server module providing a cloud service to the user terminal; a manager module managing the server module; and a database. The server module includes a security module having a container structure and performing authentication of the user terminal; a data storage module having a container structure and periodically storing the event data stored in the in-memory cluster in the database; and a service module providing the cloud service by using the event data.

Abstract: As described above, the caisson structure according to the present invention is robotized to be moved up and down by itself, and thus there is no need of using large-size constructive machines such as cranes that are used in the existing construction methods, and has an effect of improving capability of structures for underground soil blocking against a lateral force since connections and engagement among inter-lateral-side iron rods or reinforced iron members are continuously integrated all over the four surfaces, which has been weak in a bored piling construction method and a continuous wall construction method such as an SCW (Soil Cement Wall) construction method or CIP (Cast-In Placed Pile) construction method, and this significantly reduces usage of internal reinforcement materials for supporting beams, thus saving costs of construction.