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Elfreda Annmary Chatman (1942-2002) was an African-American researcher, professor, and former Catholic religious sister. [1] She was well known for her ethnographic approaches in researching information seeking behaviors among understudied or minority groups (poor people, the elderly, retired women, female inmates, and janitors).
Everett M. "Ev" Rogers (March 6, 1931 – October 21, 2004) was an American communication theorist and sociologist, who originated the diffusion of innovations theory and introduced the term early adopter.
PubMed Central (PMC) is a free digital repository that archives open access full-text scholarly articles that have been published in biomedical and life sciences journals. As one of the major research databases developed by the National Center for Biotechnology Information (NCBI), PubMed Central is more than a document repository.
Logo of bioRxiv, an open archive for biology preprints. PCI provides scientific validation of manuscripts, accessible in open archives in accordance with the principle of open access (free access for the author and for the reader), with the recommendations of the experts also being accessible to the reader and citable because they are signed and provided with a digital object identifier.
The diffusion of an innovation typically follows an S-shaped curve which often resembles a logistic function. Roger's diffusion model concludes that the popularity of a new product will grow with time to a saturation level and then decline, but it cannot predict how much time it will take and what the saturation level will be.
In such a model, nodes represent agents (e.g. companies or organizations) and ties represent a connection between two entities (e.g. a company-client relationship or competitive relationship). Diffusion occurs when a novel idea, product, or process is implemented by an agent and permeates through these ties to others. [8]
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Rather than making journal articles accessible through a subscription business model, all academic publications could be made free to read and published with some other cost-recovery model, such as publication charges, subsidies, or charging subscriptions only for the print edition, with the online edition gratis or "free to read".