Content Coverage of PNAS in 1982-2001
نویسندگان
چکیده
This paper reports results of determining changes in content coverage of the Proceedings of the National Academy of Science (PNAS). Dominant keywords were extracted to visualize major research topics and their evolution in the 20-year time frame. Two time slices namely 1995 and 2001 are examined in detail. Latent Semantic Analysis [6] was applied to determine the space of semantically similar documents for both years. Co-word analysis resulted in space of terms used in titles and keywords of articles. The results were visualized using graph layout algorithms available in the graphical visualization software Pajek [2].
منابع مشابه
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