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Open access

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Open access (OA) refers to a specific set of principles and practices in scholarly publishing. These practices ensure that research publications are delivered to readers without access charges or other barriers.

Open Access logo PLoS transparent
Open Access logo PLoS transparent

While many publications are protected by copyright, open access seeks to make them available to everyone. This movement focuses heavily on peer-reviewed research literature, particularly academic journals. This focus exists because academic journals have faced a "serials crisis" unlike fiction or news media. In many academic fields, researchers cannot simply substitute a paywalled article with older, free information. For example, a physician treating an emergency requires the most recent clinical reviews. They cannot rely on a 90-year-old article published before modern medicines like prednisone were invented.

Preprint postprint published
Preprint postprint published

To understand how open access works, one must look at the different funding models. In traditional publishing, journals cover costs through subscriptions, site licenses, or pay-per-view charges. Open access journals instead rely on author fees, public funding, subsidies, or sponsorships. This shift is possible because electronic publishing costs are much lower than paper distribution. Furthermore, authors of research papers are generally not paid for their work. Therefore, they do not suffer a direct monetary loss when switching to open access. This allows the knowledge to flow more freely to the global community.

DOAJ APCs
DOAJ APCs

Scholars often use a color-coded system to describe different types of open access. Gold open access is one of the most common models. In this system, the publisher makes all articles available for free on their website immediately. These articles often use Creative Commons licenses, which allow for sharing and reuse. Many gold OA publishers use an "author-pays" model. This involves an Article Processing Charge (APC) paid through grants or institutions.

Gold vs green OA at individual universities
Gold vs green OA at individual universities

Green open access involves a process called self-archiving. In this model, authors post their work to a website they control. This could be a personal site, a research institution's site, or a central repository. This method is free for the author. If the author archives a version that has undergone peer review, it is called a "postprint." This is often the accepted manuscript returned by the journal.

Preprint postprint published
Preprint postprint published

Some journals operate as hybrid open access models. These journals contain a mixture of both open access and closed access articles. They are partially funded by subscriptions, but individual articles become open if the author pays a fee. This model is often controversial due to a practice called "double dipping." This occurs when both the authors and the subscribers are charged for the same content. Because of this, some call hybrid OA a "Mephistophelian invention."

Share of hybrid open access articles in journal of top three publishers
Share of hybrid open access articles in journal of top three publishers

Other specific models include bronze, diamond, and platinum open access. Bronze OA articles are free to read on a publisher's page but lack a clear reuse license. Diamond or platinum OA journals are unique because they charge neither the readers nor the authors. These journals rely on external funding like advertisements, philanthropists, or government grants. There are currently over 350 platinum OA journals across many disciplines. These journals are often small and frequently use multiple languages to reach more people.

DOAJ licenses
DOAJ licenses

There is also a distinction between "gratis" and "libre" open access. Gratis access means the content is free to read online without the right to reuse it. Libre access means the content is free to read and includes rights for reuse. These reuse rights are usually managed through Creative Commons licenses. All such licenses require at least the attribution of authorship to the original creators. In 2012, the number of works under libre open access was increasing rapidly.

DOAJ licenses
DOAJ licenses

Finally, open access connects to broader scientific standards like the FAIR principles. FAIR stands for findable, accessible, interoperable, and reusable. These principles were proposed in March 2016 and endorsed by the G20. It is important to note that FAIR data can sometimes be restricted by authentication. Therefore, only FAIR data without access restrictions is considered truly open access. This movement continues to evolve through debates over business models and research evaluation.

ROAR growth
ROAR growth
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🖼️ Images & Media (15)
File:Open Access logo PLoS transparent.svg
Open Access logo PLoS transparent.svg
PhD Comics Open Access Week 2012.ogv
File:Sci-hub downloads.png
Sci-hub downloads.png
File:DOAJ licenses.png
DOAJ licenses.png
File:DOAJ APCs.png
DOAJ APCs.png
File:Preprint postprint published.svg
Preprint postprint published.svg
File:Elsevier Embargo lengths.png
Elsevier Embargo lengths.png
Thank you for practicing Open Science -...
File:Share of hybrid open access articles in journal of top three publishers.png
Share of hybrid open access articles in...
File:Gold vs green OA at individual universities.jpg
Gold vs green OA at individual universities.jpg
File:Percentage of Open Access articles from 8 oldest journal publishers, WebOfScience data.png
Percentage of Open Access articles from 8...
File:Open access citation advantage.png
Open access citation advantage.png

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