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Digital object identifier. A digital object identifier (DOI) is a persistent identifier or handle used to uniquely identify various objects, standardized by the International Organization for Standardization (ISO). [1] DOIs are an implementation of the Handle System; [2][3] they also fit within the URI system (Uniform Resource Identifier).
The main academic full-text databases are open archives or link-resolution services, although others operate under different models such as mirroring or hybrid publishers. Such services typically provide access to full text and full-text search, but also metadata about items for which no full text is available.
Alexandra Elbakyan at a conference at Harvard (2010). Sci-Hub was created by Alexandra Elbakyan, who was born in Kazakhstan in 1988. [22] Elbakyan earned her undergraduate degree at Kazakh National Technical University [23] studying information technology, then worked for a year for a computer security firm in Moscow, then joined a research team at the University of Freiburg in Germany in 2010 ...
WP:DOI. A digital object identifier (DOI) is a unique persistent identifier to a published work, similar in concept to an ISBN. Wikipedia supports the use of DOI to link to published content. Where a journal source has a DOI, it is good practice to use it, in the same way as it is good practice to use ISBN references for book sources.
Each arXiv paper has a unique identifier: YYMM.NNNNN, e.g. 1507.00123, YYMM.NNNN, e.g. 0704.0001, arch-ive/YYMMNNN for older papers, e.g. hep-th/9901001. Different versions of the same paper are specified by a version number at the end. For example, 1709.08980v1. If no version number is specified, the default is the latest version.
Third of Einstein's four papers in November 1915. A pivotal paper in which Einstein shows that general relativity explains the anomalous precession of the planet Mercury, which had vexed astronomers since 1859. This paper also introduced the important calculational method, the post-Newtonian expansion. Einstein also calculated correctly (for ...
The Publisher Item Identifier (PII) is a unique identifier used by a number of scientific journal publishers to identify documents. [1] It uses the pre-existing ISSN or ISBN of the publication in question, and adds a character for source publication type, an item number, and a check digit. The system was adopted in 1996 by the American Chemical ...
Use WebMD’s Pill Identifier to find and identify any over-the-counter or prescription drug, pill, or medication by color, shape, or imprint and easily compare pictures of multiple drugs.