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Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. . Released in beta in November 2004, the Google Scholar index includes peer-reviewed online academic journals and books, conference papers, theses and dissertations, preprints, abstracts, technical reports, and other ...
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.
To search within a top-level domain or generic top-level domain, a "site" parameter can be added. For example: "Search topic" site:*.ro lists websites under the .ro generic top-level domain. Omitting results by adding a minus (-) sign and url addresses for unwanted sites can result in higher-relevance hits (or at least higher relevance hits per ...
The single most useful search engine tool may be the use of quotation marks to find an exact match for a phrase. However, a search engine such as Google has both an easy, and an advanced search with further search options. The advanced search makes it easier to enter advanced options, that may help your searching.
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Wikipedia began as a complementary project for Nupedia, a free online English-language encyclopedia project whose articles were written by experts and reviewed under a formal process. [ 20] It was founded on March 9, 2000, under the ownership of Bomis, a web portal company.
Astronomy. Hypatia[ a] (born c. 350–370; died 415 AD) [ 1][ 4] was a Neoplatonist philosopher, astronomer, and mathematician who lived in Alexandria, Egypt, then part of the Eastern Roman Empire. She was a prominent thinker in Alexandria where she taught philosophy and astronomy. [ 5] Although preceded by Pandrosion, another Alexandrian ...
Dr. Leana Wen: Menopause is the period in a woman’s life when her menstrual periods stop. For most women, this natural, biological process occurs as a part of going through midlife when the ...