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Various collaborative online encyclopedias were attempted before the start of Wikipedia, but with limited success. [19] 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]
Patents #1–#50. U.S. patent 334,823 - Commutator for Dynamo Electric Machines - 1886 January 26 - Elements to prevent sparking on dynamo-electric machines; Drum-style with brushes. U.S. patent 335,786 - Electric Arc lamp - 1886 February 9 - Arc lamp with carbon electrodes controlled by electromagnets or solenoids and a clutch mechanism ...
Hollowing out of the middle class refers to its loss in income share beginning with Reaganomics. [288] [289] [290] The middle class is defined as the middle 20% of the income distribution, i.e. those between the 40th and 60th percentile. In 1980 the middle class earned 17% of total income in the United States.
Orgasm gap. The orgasm gap or pleasure gap is the disparity in sexual satisfaction —specifically the unequal frequency in achieving orgasm during sexual encounters—between heterosexual men and women. Across every demographic that has been studied, women report the lowest frequency of reaching orgasm during sexual encounters with men.
An intelligence quotient ( IQ) is a total score derived from a set of standardised tests or subtests designed to assess human intelligence. [ 1] The abbreviation "IQ" was coined by the psychologist William Stern for the German term Intelligenzquotient, his term for a scoring method for intelligence tests at University of Breslau he advocated in ...
The interference theory is a theory regarding human memory. Interference occurs in learning. The notion is that memories encoded in long-term memory (LTM) are forgotten and cannot be retrieved into short-term memory (STM) because either memory could interfere with the other. [ 1] There is an immense number of encoded memories within the storage ...
Textbook. Textbooks written in Pashto distributed to Afghan school children. A textbook is a book containing a comprehensive compilation of content in a branch of study with the intention of explaining it. Textbooks are produced to meet the needs of educators, usually at educational institutions.
Scotland uses its own classification system for Land Capability for Agriculture (LCA). It has seven Classes which subdivide. The Prime Quality Land is in Classes 1–3.1 inclusive, corresponding to the superior grades 1–3a in the English/Welsh system. Downloadable data and maps are available from the Scottish Government online. [109]