A Method for Retrieving Search Keywords which have been in Use for a Long Time

概要

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In recent years, with the spread of social networks on the Web, some forms of Web information have become popular very rapidly. For example, with the influence of Twitter and social bookmark services, there is an increasing tendency for information to surge in popularity in short bursts. When it is no longer of interest, much of this information becomes useless and information with a short shelf-life is increasing rapidly.Thus, we think that indicators of how long information has been used for are becoming more and more important. In this paper, we therefore propose a method for calculating how long information has been used for and a way of retrieving information which has been used continuously for a long time. In addition, we have developed a system for retrieving search keywords which have been used over a long period of time. The system uses time information of how long keywords have been used in Web searches.