Open access (OA) is a set of principles and a range of practices through which nominally copyrightable publications are delivered to readers free of access charges or other barriers. With open access strictly … See more

The emergence of open science or open research has brought to light a number of controversial and hotly-debated topics.
Scholarly publishing invokes various positions and passions. For example, authors may spend hours struggling with diverse article … See more

Extent
Various studies have investigated the extent of open access. A study published in 2010 showed that roughly 20% of the total number of peer … See more

Databases and repositories
Multiple databases exist for open access articles, journals and datasets. These databases overlap, however each has different inclusion criteria, which typically include extensive vetting for journal publication … See more

There are different models of open access publishing and publishers may use one or more of these models.
Colour naming system
Different open access types are currently commonly described using a colour system. The most … See more

Open access (mostly green and gratis) began to be sought and provided worldwide by researchers when the possibility itself was opened by the advent of Internet and the World Wide Web. The momentum was further increased by a growing movement … See more

Article impact
Since published articles report on research that is typically funded by government or university grants, the more the article is used, cited, applied … See more