Abstract: Provided is a method and system for detecting a graph-based event in a social network, the method including generating a keyword graph based on social data collected from a social network system; separating the keyword graph into a plurality of candidate graphs through clustering; calculating a user interest for each of the plurality of candidate graphs based on a per-time variation of a social action associated with the social data; and determining k candidate graphs from among the plurality of candidate graphs as an event graph based on the user interest. Here, k denotes a natural number.

Abstract: A multi-level caching method and a multi-level caching system for enhancing a graph processing performance are provided. The multi-level caching method includes searching for graph data associated with a query from a first cache memory in which data output in response to a previous query request is stored, when a query request for the query is received, re-searching for the graph data from a second cache memory in which neighboring data with a history of an access to each of data stored in the first cache memory is stored, when the graph data is not found in the first cache memory, and outputting first neighboring data found by the re-searching as the graph data when a response to the query request is output.

Abstract: Provided is a method and system for detecting a graph-based event in a social network, the method including generating a keyword graph based on social data collected from a social network system; separating the keyword graph into a plurality of candidate graphs through clustering; calculating a user interest for each of the plurality of candidate graphs based on a per-time variation of a social action associated with the social data; and determining k candidate graphs from among the plurality of candidate graphs as an event graph based on the user interest. Here, k denotes a natural number.

Abstract: Disclosed are a method of evaluating reliability of information in a social media service includes calculating an evaluation score of information provided by an information provider on the basis of a social activity of each of a plurality of information consumers relating to the information, and calculating a reputation score of the information provider in a category of the information on the basis of the category and the evaluation score of the information.

Abstract: Disclosed are a method of evaluating reliability of information in a social media service includes calculating an evaluation score of information provided by an information provider on the basis of a social activity of each of a plurality of information consumers relating to the information, and calculating a reputation score of the information provider in a category of the information on the basis of the category and the evaluation score of the information.

Abstract: A multi-level caching method and a multi-level caching system for enhancing a graph processing performance are provided. The multi-level caching method includes searching for graph data associated with a query from a first cache memory in which data output in response to a previous query request is stored, when a query request for the query is received, re-searching for the graph data from a second cache memory in which neighboring data with a history of an access to each of data stored in the first cache memory is stored, when the graph data is not found in the first cache memory, and outputting first neighboring data found by the re-searching as the graph data when a response to the query request is output.

Abstract: Disclosed are a method and system for evaluating reliability on the basis of an analysis on user activities on a social medium. The method of evaluating reliability of information in a social media service includes calculating an evaluation score of information provided by an information provider on the basis of a social activity of each of a plurality of information consumers relating to the information, and calculating a reputation score of the information provider in a category of the information on the basis of the category and the evaluation score of the information.