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Timeline Of Snowflake Research
The hexagonal snowflake, a crystalline formation of ice, has intrigued people throughout history. This is a chronology of interest and research into snowflakes. Artists, philosophers, and scientists have wondered at their shape, recorded them by hand or in photographs, and attempted to recreate hexagonal snowflakes. Wilson Alwyn Bentley (February 9, 1865 – December 23, 1931), also known as Snowflake Bentley, was an American meteorologist and photographer, who was the first known person to take detailed photographs of snowflakes and record their features. He perfected a process of catching flakes on black velvet in such a way that their images could be captured before they either melted or sublimated. Chronological list BC to 1900 * or - Han Ying ( 韓嬰) compiled the anthology '' Han shi waizhuan'', which includes a passage that contrasts the pentagonal symmetry of flowers with the hexagonal symmetry of snow. This is discussed further in the '' Imperial Readings of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexagonal
In geometry, a hexagon (from Greek , , meaning "six", and , , meaning "corner, angle") is a six-sided polygon. The total of the internal angles of any simple (non-self-intersecting) hexagon is 720°. Regular hexagon A ''regular hexagon'' has Schläfli symbol and can also be constructed as a truncated equilateral triangle, t, which alternates two types of edges. A regular hexagon is defined as a hexagon that is both equilateral and equiangular. It is bicentric, meaning that it is both cyclic (has a circumscribed circle) and tangential (has an inscribed circle). The common length of the sides equals the radius of the circumscribed circle or circumcircle, which equals \tfrac times the apothem (radius of the inscribed circle). All internal angles are 120 degrees. A regular hexagon has six rotational symmetries (''rotational symmetry of order six'') and six reflection symmetries (''six lines of symmetry''), making up the dihedral group D6. The longest diagonals of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rasmus Bartholin
Rasmus Bartholin (; Latinized: ''Erasmus Bartholinus''; 13 August 1625 – 4 November 1698) was a Danish physician and grammarian. Biography Bartholin was born in Roskilde. He was the son of Caspar Bartholin the Elder (1585–1629) and Anna Fincke, daughter of the mathematician Thomas Fincke. As part of his studies, he travelled in Europe for ten years. He stayed in the Netherlands, England, France and Italy. In 1647, he took a Master's degree at the University of Copenhagen. In 1654, he received a Doctoral degree at the University of Padua. He was a professor at the University of Copenhagen, first in Geometry, later in Medicine. He was also dean of the faculty of medicine, librarian, and rector. He wrote, in Latin, the first grammar of the Danish language, the 1657 ''De studio lingvæ danicæ''. Rasmus Bartholin is remembered especially for his discovery (1669) of the double refraction of a light ray by Iceland spar (calcite). He published an accurate description of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doi Toshitsura
was a Japanese '' daimyō'' of the Edo period, who ruled the Koga Domain. He served as a '' rōjū'' for Tokugawa Ienari during the Tokugawa shogunate. References * Bolitho, Harold. (1974). ''Treasures Among Men: The Fudai Daimyo in Tokugawa Japan.'' New Haven: Yale University Press. OCLC 185685588 See also *Sekka Zusetu ''Sekka Zusetsu'' () is a figure collection written by Doi Toshitsura, the fourth ''daimyō'' of Koga Domain in 1832. Overview Koga Domain was located at the center of the Kantō Plain. Due to heavy snowfall, the Koga Domain was a good pla ... - Figure collection of snowflake 1789 births 1848 deaths Daimyo Rōjū Kyoto Shoshidai {{daimyo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Scoresby
William Scoresby (5 October 178921 March 1857) was an English whaler, Arctic explorer, scientist and clergyman. Early years Scoresby was born in the village of Cropton near Pickering south-west of Whitby in Yorkshire. His father, William Scoresby (1760–1829), made a fortune in the Arctic whale fishery and was also the inventor of the barrel crow's nest. The son made his first voyage with his father at the age of eleven, but then returned to school, where he remained until 1803. After this he became his father's constant companion, and accompanied him as chief officer of the whaler ''Resolution'' when on 25 May 1806, he succeeded in reaching 81°30' N. lat. (19° E. long), for twenty-one years the highest northern latitude attained in the eastern hemisphere. During the following winter, Scoresby attended the natural philosophy and chemistry classes at Edinburgh University, and again in 1809. Scientist In his voyage of 1807, Scoresby began the study of the meteorology and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microscope
A microscope () is a laboratory instrument used to examine objects that are too small to be seen by the naked eye. Microscopy is the science of investigating small objects and structures using a microscope. Microscopic means being invisible to the eye unless aided by a microscope. There are many types of microscopes, and they may be grouped in different ways. One way is to describe the method an instrument uses to interact with a sample and produce images, either by sending a beam of light or electrons through a sample in its optical path, by detecting photon emissions from a sample, or by scanning across and a short distance from the surface of a sample using a probe. The most common microscope (and the first to be invented) is the optical microscope, which uses lenses to refract visible light that passed through a thinly sectioned sample to produce an observable image. Other major types of microscopes are the fluorescence microscope, electron microscope (both the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shiba Kōkan
, born Andō Kichirō (安藤吉次郎) or Katsusaburō (勝三郎), was a Japanese painter and printmaker of the Edo period, famous both for his Western-style '' yōga'' paintings, in imitation of Dutch oil painting styles, methods, and themes, which he painted as Kōkan, and his ukiyo-e prints, which he created under the name Harushige, but also producing forgeries of the works of Suzuki Harunobu. He is said to have boasted of his ability to forge the great master so well. He also was engaged in Western learning ( Rangaku) in the field of astronomy. Life Kōkan started his artistic career at the age of 15 at the Kanō school in Edo, but left the school six years later. He was influenced then by Suzuki Harunobu and Sō Shiseki. In 1773 he met Hiraga Gennai. Kōkan mastered a number of very different styles, and was also a great innovator, exploring new methods and styles on his own. He became the first Japanese artist, in 1783, to use copperplate engraving, a print, cal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jan Hendrik Van Kinsbergen
Jan Hendrik van Kinsbergen, Count of Doggerbank (1 May 1735 – 24 May 1819), was a Dutch naval officer. Having had a good scientific education, Van Kinsbergen was a proponent of fleet modernization and wrote many books about naval organization, discipline and tactics. In 1773, he twice defeated an Ottoman fleet while in Russian service. Returning to the Dutch Republic in 1775, he became a Dutch naval hero in 1781, fighting the Royal Navy, and gradually attained the position of commander-in-chief as a lieutenant-admiral. When France conquered the Republic in 1795 he was fired by the new revolutionary regime and prevented from becoming Danish commander-in-chief, but the Kingdom of Holland reinstated him in 1806, in the rank of fleet marshal, and made him a count. He was again degraded by the French Empire in 1810; after the liberation the United Kingdom of the Netherlands in 1814 honoured him with his old rank of lieutenant-admiral. Van Kinsbergen, in his later life a very we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johannes Florentius Martinet
Johannes is a Medieval Latin form of the personal name that usually appears as "John" in English language contexts. It is a variant of the Greek and Classical Latin variants (Ιωάννης, '' Ioannes''), itself derived from the Hebrew name '' Yehochanan'', meaning "Yahweh is gracious". The name became popular in Northern Europe, especially in Germany because of Christianity. Common German variants for Johannes are ''Johann'', ''Hannes'', '' Hans'' (diminutized to ''Hänschen'' or ''Hänsel'', as known from "''Hansel and Gretel''", a fairy tale by the Grimm brothers), '' Jens'' (from Danish) and ''Jan'' (from Dutch, and found in many countries). In the Netherlands, Johannes was without interruption the most common masculine birth name until 1989. The English equivalent for Johannes is John. In other languages *Joan, Jan, Gjon, Gjin and Gjovalin in Albanian *'' Yoe'' or '' Yohe'', uncommon American form''Dictionary of American Family Names'', Oxford University Press, 2013. *Yaḥ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theologian
Theology is the systematic study of the nature of the divine and, more broadly, of religious belief. It is taught as an academic discipline, typically in universities and seminaries. It occupies itself with the unique content of analyzing the supernatural, but also deals with religious epistemology, asks and seeks to answer the question of revelation. Revelation pertains to the acceptance of God, gods, or deities, as not only transcendent or above the natural world, but also willing and able to interact with the natural world and, in particular, to reveal themselves to humankind. While theology has turned into a secular field , religious adherents still consider theology to be a discipline that helps them live and understand concepts such as life and love and that helps them lead lives of obedience to the deities they follow or worship. Theologians use various forms of analysis and argument ( experiential, philosophical, ethnographic, historical, and others) to help ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Donato Rossetti
Donato may refer to: People *Donato (surname) As a given name * Donato Bilancia (1951–2020), Italian serial killer * Donato Bramante (1444–1514), Italian architect * Donato da Cascia (fl. c. 1350 – 1370), Italian composer of trecento madrigals * Donato di Niccolò di Betto Bardi (1386–1466), Italian sculptor * Donato Gama da Silva (born 1962), Brazilian-Spanish footballer * Donato Giancola (born 1967), American illustration artist * Donato Guerra (1832–1876), leader of the Mexican Army during the time of La Reforma Places *Donato, Piedmont, a ''comune'' in the Province of Biella, Italy *Donato Guerra, State of Mexico, a town and municipality in Mexico *San Donato di Ninea, a town and comune in the province of Cosenza in the Calabria region of southern Italy Companies *Donatos Pizza, American pizza company See also *Donatus (other) *San Donato (other) San Donato is the Spanish and Italian form of Saint Donatus. It can refer to: People *Sai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Friedrich Martens
Friedrich Fromhold Martens, or Friedrich Fromhold von Martens,, french: Frédéric Frommhold (de) Martens ( – ) was a diplomat and jurist in service of the Russian Empire who made important contributions to the science of international law. He represented Russia at the Hague Peace Conferences (during which he drafted the Martens Clause) and helped to settle the first cases of international arbitration, notably the dispute between France and the United Kingdom over Newfoundland. As a scholar, he is probably best remembered today for having edited 15 volumes of Russian international treaties (1874–1909). Biography Born to ethnic Estonian parents at Pärnu in the Governorate of Livonia of Russian Empire, Martens was later raised and educated as a German-speaker. He lost both parents at the age of nine and was sent to a Lutheran orphanage in St. Petersburg, where he successfully completed the full course of studies at a German high school and in 1863 entered the law faculty of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
