Abstract: Proposed is a method for providing at least one channel group by a server. The method may include in response to an interaction from a user terminal requesting creation of a channel group, creating the channel group; in response to the channel group being created. The method may also include creating a default chat channel included in the channel group. The method may further include in response to an interaction from the user terminal requesting creation of a chat channel, creating the chat channel included in the channel group.

Abstract: Disclosed are a separator which can prevent deterioration due to non-uniform current density distribution by uniformly supplying reactants without increasing the size of the separator, and a fuel cell including the same. The disclosed separator includes: a body plate; an inlet formed in one side of the body plate; an outlet formed in the other side of the body plate; a first meandering flow path formed by being connected to the inlet; a second meandering flow path formed by being connected to the outlet; and a parallel flow path formed between the first meandering flow path and the second meandering flow path.

Abstract: Disclosed is a method of operating a terminal on which an application for an instant messaging service is installed, the method that displays a first user interface (UI) for switching an input mode in a chatting interface of a chatroom in which a user of the application is participating, based on whether the user is assigned an authority to emphasize a message in the chatroom, switches the input mode from a first mode which is a normal mode to a second mode for emphasizing a message, in response to a user input with respect to the first UI, emphasizes a message input in the second mode for a predetermined period in a predetermined manner, and cancels the emphasizing of the message input in the second mode, when the predetermined time elapses.

Abstract: Disclosed is a method of operating a terminal on which an application for an instant messaging service is installed, the method that displays a first user interface (UI) for switching an input mode in a chatting interface of a chatroom in which a user of the application is participating, based on whether the user is assigned an authority to emphasize a message in the chatroom, switches the input mode from a first mode which is a normal mode to a second mode for emphasizing a message, in response to a user input with respect to the first UI, emphasizes a message input in the second mode for a predetermined period in a predetermined manner, and cancels the emphasizing of the message input in the second mode, when the predetermined time elapses.