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Adriaan Anthonisz
Adriaan Anthonisz (also known as Adriaen Anthonisz of Alcmaer) (1527–1607) was a Dutch mathematician, Surveying, surveyor, cartographer, and military engineer who specialized in the design of fortifications. As a mathematician Anthonisz calculated in 1585 the ratio of a circle's circumference to its diameter, which would later be called pi. Life Anthonisz served as burgomaster (mayor) of Alkmaar in the Netherlands from 1582. Adriaan fathered two sons, and named them both Metius (from the Dutch word ''meten'', meaning 'measuring', 'measurer', or surveyor). They each became prominent members of society. Adriaan Metius (9 Dec 1571 – 6 Sep 1635) was a Dutch geometer and astronomer. Jacob Metius worked as an instrument-maker and a specialist in grinding lenses and applied for patent rights for the telescope a few weeks after Middelburg spectacle-maker Hans Lippershey tried to patent the same device. Career In 1585 Anthonisz discovered that the ratio of a circle's circumference to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mr Adriaan Anthonisz John Bier Noorderkade Alkmaar
''Mister'', usually written in its contracted form ''Mr.'' or ''Mr'', is a commonly used English honorific for men without a higher honorific, or professional title, or any of various designations of office. The title 'Mr' derived from earlier forms of ''Master (form of address), master'', as the equivalent female titles ''Mrs., Mrs'', ''Miss'', and ''Ms., Ms'' all derived from earlier forms of ''Mistress (form of address), mistress''. ''Master'' is sometimes still used as an honorific for boys and young men. The modern plural form is ''Misters'', although its usual formal abbreviation ''Messrs''(.) derives from use of the French title ' in the 18th century. ' is the plural of ' (originally ', "my lord"), formed by declension (nouns), declining both of its constituent parts separately. Historical etiquette Historically, ''mister'' was applied only to those above one's own status if they had no higher title such as ''Sir'' or ''my lord'' in the English class system. That unders ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Milü
Milü (; "close ratio"), also known as Zulü ( Zu's ratio), is the name given to an approximation to (pi) found by Chinese mathematician and astronomer Zu Chongzhi in the 5th century. Using Liu Hui's algorithm (which is based on the areas of regular polygons approximating a circle), Zu famously computed to be between 3.1415926 and 3.1415927 and gave two rational approximations of , and , naming them respectively Yuelü (; "approximate ratio") and Milü. is the best rational approximation of with a denominator of four digits or fewer, being accurate to six decimal places. It is within % of the value of , or in terms of common fractions overestimates by less than . The next rational number (ordered by size of denominator) that is a better rational approximation of is , still only correct to six decimal places and hardly closer to than . To be accurate to seven decimal places, one needs to go as far as . For eight, is needed. The accuracy of Milü to the true value of ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
16th-century Dutch Military Personnel
The 16th century begins with the Julian year 1501 ( MDI) and ends with either the Julian or the Gregorian year 1600 ( MDC) (depending on the reckoning used; the Gregorian calendar introduced a lapse of 10 days in October 1582). The 16th century is regarded by historians as the century which saw the rise of Western civilization and the Islamic gunpowder empires. The Renaissance in Italy and Europe saw the emergence of important artists, authors and scientists, and led to the foundation of important subjects which include accounting and political science. Copernicus proposed the heliocentric universe, which was met with strong resistance, and Tycho Brahe refuted the theory of celestial spheres through observational measurement of the 1572 appearance of a Milky Way supernova. These events directly challenged the long-held notion of an immutable universe supported by Ptolemy and Aristotle, and led to major revolutions in astronomy and science. Galileo Galilei became a champion of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
