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2018 ; 13
(2
): e0193331
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A generative model for scientific concept hierarchies
#MMPMID29474409
Datta S
; Adar E
PLoS One
2018[]; 13
(2
): e0193331
PMID29474409
show ga
In many scientific disciplines, each new 'product' of research (method, finding,
artifact, etc.) is often built upon previous findings-leading to extension and
branching of scientific concepts over time. We aim to understand the evolution of
scientific concepts by placing them in phylogenetic hierarchies where scientific
keyphrases from a large, longitudinal academic corpora are used as a proxy of
scientific concepts. These hierarchies exhibit various important properties,
including power-law degree distribution, power-law component size distribution,
existence of a giant component and less probability of extending an older
concept. We present a generative model based on preferential attachment to
simulate the graphical and temporal properties of these hierarchies which helps
us understand the underlying process behind scientific concept evolution and may
be useful in simulating and predicting scientific evolution.