title: The spread of scientific information: insights from the web usage statistics in PLoS article-level metrics.
abstract: The presence of web-based communities is a distinctive signature of Web 2.0. The web-based feature means that information propagation within each community is highly facilitated, promoting complex collective dynamics in view of information exchange. In this work, we focus on a community of scientists and study, in particular, how the awareness of a scientific paper is spread. Our work is based on the web usage statistics obtained from the PLoS Article Level Metrics dataset compiled by PLoS. The cumulative number of HTML views was found to follow a long tail distribution which is reasonably well-fitted by a lognormal one. We modeled the diffusion of information by a random multiplicative process, and thus extracted the rates of information spread at different stages after the publication of a paper. We found that the spread of information displays two distinct decay regimes: a rapid downfall in the first month after publication, and a gradual power law decay afterwards. We identified these two regimes with two distinct driving processes: a short-term behavior driven by the fame of a paper, and a long-term behavior consistent with citation statistics. The patterns of information spread were found to be remarkably similar in data from different journals, but there are intrinsic differences for different types of web usage (HTML views and PDF downloads versus XML). These similarities and differences shed light on the theoretical understanding of different complex systems, as well as a better design of the corresponding web applications that is of high potential marketing impact.
authors: Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut, United States of America.
authors: Koon-Kiu
authors: KK
authors: Yan
authors: Mark
authors: M
authors: Gerstein
references: Phys Rev Lett. 2007 Sep 28;99(13):138701
references: 17930647
references: PLoS One. 2008 Feb 27;3(2):e1683
references: 18301760
references: Proc Natl Acad Sci U S A. 2002 Oct 29;99(22):14014-9
references: 12381792
references: Proc Natl Acad Sci U S A. 2008 Nov 11;105(45):17268-72
references: 18978030
references: BMJ. 2008 Jul 31;337:a568
references: 18669565
references: Science. 1968 Jan 5;159(3810):56-63
references: 5634379
references: Science. 2009 Feb 6;323(5915):721-3
references: 19197046
references: PLoS One. 2009;4(3):e4803
references: 19277205
references: Proc Natl Acad Sci U S A. 2007 Nov 6;104(45):17599-601
references: 17962416
references: Proc Natl Acad Sci U S A. 2008 Oct 14;105(41):15649-53
references: 18824681
references: Phys Rev E Stat Nonlin Soft Matter Phys. 2010 May;81(5 Pt 2):056101
references: 20866291
references: J Am Soc Inf Sci Technol. 2010 Jul;61(7):1377-1385
references: 21858251
references: Science. 1965 Jul 30;149(3683):510-5
references: 14325149