| dbo:abstract |
In somewhat archaic applied mathematics, dialling is the mathematics required to create a sundial face to determine solar time based on the position of the sun. Those skilled in the art were referred to as dialists or gnomonists, the latter derived from the word gnomon, which was a device that used a shadow as an indicator. The mathematician William Oughtred published a book, Easy Method of Mathematical Dialling, around 1600. Samuel Walker (1716–1782) was a Yorkshire mathematician and diallist. In his later years, Thomas Jefferson was known to practice dialling as a mental exercise. Professor of astronomy at Gresham College (London, UK), Samuel Foster (d. 1652), developed reflex dialling, which describes a device of his own invention: a sundial capable of reflecting a spot of light onto the ceiling of a room. (en) Geralmente, discagem significa efetuar uma chamada telefônica através do disco rotatório ou teclado de um telefone. (pt) |
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dbc:Timekeeping dbr:Shadow dbr:Clock dbr:Gear dbr:Gnomon dbr:Thomas_Jefferson dbr:William_Oughtred dbr:Gresham_College dbr:Astronomy dbc:History_of_mathematics dbr:Latin dbr:Sundial dbr:Solar_time dbr:Samuel_Foster |
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dbc:Timekeeping dbc:History_of_mathematics |
| rdfs:comment |
Geralmente, discagem significa efetuar uma chamada telefônica através do disco rotatório ou teclado de um telefone. (pt) In somewhat archaic applied mathematics, dialling is the mathematics required to create a sundial face to determine solar time based on the position of the sun. Those skilled in the art were referred to as dialists or gnomonists, the latter derived from the word gnomon, which was a device that used a shadow as an indicator. (en) |
| rdfs:label |
Dialling (mathematics) (en) Discagem (pt) |
| owl:sameAs |
wikidata:Dialling (mathematics) dbpedia-pt:Dialling (mathematics) https://global.dbpedia.org/id/4ixMu |
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wikipedia-en:Dialling_(mathematics)?oldid=928163368&ns=0 |
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wikipedia-en:Dialling_(mathematics) |
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dbr:Dialling |
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dbr:Reflex_dialing dbr:Reflex_dialling |
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