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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.
t. e. Library Genesis ( LibGen) is a shadow library project for file-sharing access to scholarly journal articles, academic and general-interest books, images, comics, audiobooks, and magazines. The site enables free access to content that is otherwise paywalled or not digitized elsewhere. [ 1] LibGen describes itself as a "links aggregator ...
Nature is a British weekly scientific journal founded and based in London, England. As a multidisciplinary publication, Nature features peer-reviewed research from a variety of academic disciplines, mainly in science and technology. It has core editorial offices across the United States, continental Europe, and Asia under the international ...
An academic journal or scholarly journal is a periodical publication in which scholarship relating to a particular academic discipline is published. They serve as permanent and transparent forums for the presentation, scrutiny, and discussion of research. They nearly universally require peer review for research articles or other scrutiny from ...
Hausner ratio. The Hausner ratio is a number that is correlated to the flowability of a powder or granular material. It is named after the engineer Henry H. Hausner (1900–1995). [ 1][ 2] The Hausner ratio is calculated by the formula. where is the freely settled bulk density of the powder, and is the tapped bulk density of the powder.
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.
June 24, 2024 at 6:54 PM. Céline Dion is among a small group of celebrities who publicly discussed their struggle with infertility in the early 2000s. Along with women like Brooke Shields and ...