OpenAccess.gr

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Open access repositories are databases of digital archives freely accessible online. There are two types of open access repositories:

Discipline-specific repositories (e.g. arXiv which is an archive for scientific papers in the fields of mathematics, physics, computer science, quantitative biology and statistics).
Institutional repositories, which are usually developed and supported by a scholarly organization or research institution, and contain the institution's intellectual capital (e.g. eSholarship Repository developed by California Digital Library). They are open and interoperable.

The services of open access repositories are:

Capture
Storage
Indexing
Preservation and
Redistribution of academic and research digital archives.

The idea of open access repositories was prompted by certain initiatives about the efficient dissemination of content, such as the Open Archives Initiative and ‘self-archiving initiative'.

Benefits

Self-archiving in institutional repositories:

Offers direct access to research results for everyone
Is an easy process that neither takes up a lot of time, nor requires technical skills
Maximizes the visibility, usage and impact of the research results
Broadens the knowledge network through harvesting and article indexing
Is a secure way for the authors to preserve their work
Can give access to added-value services concerning usage and citation information
Empowers the institution's status and value by showing it's scientific output.