This is one of the most pioneering works when it comes to the mapping of the various dynamics of knowledge that is scientific, by analyzing the complete series of papers which have been published in the Proceedings of the National Academy of Science, or better known as PNAS. These papers were published between the years 1982 to 2001.
The authors of this pioneering work are Ketan K. Mane and Katy Borner, and they developed this concept at the Indiana University. The working logic of this concept is very helpful for scientists, and this is what is done. The techniques for the analysis of data are applied to the data for citation, keeping in mind this method, and words which are highly frequent are studied, and analyzed and visualized.
And not only this, there are certain sudden increases in the usage of some patterns of words, which are called ‘bursts’, which can be also be identified and analyzed by using this technique. This concept of the PNAS and its Mapping Topics and Topic Bursts goes a long way to help researchers to study the frequency of words, their usage in texts, analyze their usage, and lastly, even study the increase of certain word usages, which will help those who are studying this to get the proper meaning behind certain scientific documents.