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Photoperiod is the change of day length around the seasons. The rotation of the earth around its axis produces 24 hour changes in light (day) and dark...

Almon Brown Strowger (February 11, 1839 – May 26, 1902) was an American inventor who gave his name to the Strowger switch, an electromechanical telephone...

Naval Air Station Pensacola or NAS Pensacola (IATA: NPA, ICAO: KNPA, FAA LID: NPA) (formerly NAS/KNAS until changed circa 1970 to allow Nassau International...

Ferranti or Ferranti International PLC was a UK electrical engineering and equipment firm that operated for over a century from 1885 until it went bankrupt...

The scarlet tanager (Piranga olivacea) is a medium-sized American songbird. Until recently, it was placed in the tanager family (Thraupidae), but it and...

A waypoint is a point or place on a route or line of travel, a stopping point, an intermediate point, or point at which course is changed, the first use...

Phasiinae is a subfamily of flies in the family Tachinidae. Except for the small tribe Strongygastrini members of this subfamily attack only Heteroptera...

Net promoter score (NPS) is a market research metric that is based on a single survey question asking respondents to rate the likelihood that they would...

In signal processing, the Wiener filter is a filter used to produce an estimate of a desired or target random process by linear time-invariant (LTI) filtering...

In fluid dynamics, a convection cell is the phenomenon that occurs when density differences exist within a body of liquid or gas. These density differences...

Linnaemya is a genus of flies in the family Tachinidae. Subgenus Homoeonychia Brauer & von Berganstamm, 1889 Linnaemya amicorum Draber-Monko & Kolomiets...

In gemology, chatoyancy (/ʃəˈtɔɪ.ənsi/ shə-TOY-ən-see), also called chatoyance or the cat's eye effect, is an optical reflectance effect seen in certain...

Tachinini is a tribe of flies in the family Tachinidae. Abepalpus Townsend, 1931 Acroceronia Cortés, 1951 Acuphoceropsis Blanchard, 1943 Adejeania Townsend...

Sebastian Pietro Innocenzo Adhemar Ziani de Ferranti (9 April 1864 – 13 January 1930) was a British electrical engineer and inventor who pioneered high-voltage...

Chalais-Meudon is an aeronautical research and development centre in Meudon, to the south-west of Paris. It was originally founded in 1793 in the nearby...

During the era of National Socialism in Germany the discrimination towards the "Hereditarly Diseased" was at its peak. Racial hygiene was a big concern...

Gender digital divide is defined as gender biases coded into technology products, technology sector, and digital skills education. It can refer to women's...

In 4-dimensional geometry, there are 15 uniform polytopes with H4 symmetry. Two of these, the 120-cell and 600-cell, are regular. Each can be visualized...

Cylindromyia is a genus of flies in the family Tachinidae. Subgenus Apinocyptera Townsend, 1915 Cylindromyia nana (Townsend, 1915) Cylindromyia platensis...

Dark social media, dark social, or dark traffic are terms coined by the online marketing and advertising community to refer to social sharing of URLs that...