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Royal Norton Chapman
Royal Norton Chapman (17 September 1889 – 2 December 1939) was an American entomologist who examined insect ecology. He was one of the pioneers of quantitative ecology, with his extensive experimental studies on the population dynamics of '' Tribolium'' beetles. His textbook ''Insect Ecology'' (1931) was a landmark in ecological entomology. Chapman was born in Morristown, Minnesota of Anglo-Dutch ancestry. He joined Pillsbury Academy after schooling in Iowa, Nebraska and Minnesota. He received a BA in 1914 and an MA in 1915 from the University of Minnesota, working on the life history of ''Agrilus bilineatus'' under the supervision of A.G. Ruggles, after which he joined Cornell University for his doctorate under John Henry Comstock. He then joined the University of Minnesota to work on quantitative ecology of insects. In 1925 he became a head of the division of entomology and economic zoology at the university. He worked on applied entomology research, working on pests in pineapp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tribolium (beetle)
''Tribolium'' is a genus of flour beetles in the family Tenebrionidae. They are known by various common names including flour beetles, flour weevils, red weevils and bran bugs. Description Adult ''Tribolium'' are beetles 3–6 mm in length and with colours ranging from reddish-brown to black. The clypeus is enlarged and has genae forming shelf-like projections extending around the sides, partly dividing the eyes. The Antenna (biology), antennae are 11-segmented and either expand towards the ends or have terminal clubs. The prothorax is nearly square in shape and rounded on the sides. The Elytron, elytra are striated. They possess well-developed wings, but at least one species (''T. confusum'') is unable to use them to fly. The two sexes are similar in external appearance, i.e. there is no sexual dimorphism. The eggs are 0.6 mm long, oblong in shape and whitish to nearly transparent in colour. The larvae are elongate and approximately 6–7 mm long when mature. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morristown, Minnesota
Morristown is a city in Rice County, Minnesota, United States. The population was 987 at the 2010 census. History Morristown was platted in 1855, and named for Walter Morris, a pioneer settler. Geography According to the United States Census Bureau, the city has a total area of ; is land and is water. Nearly the entirety of Morristown lies on the southern bank of the Cannon River. Minnesota State Highway 60 serves as a main route in the community. Demographics 2010 census As of the census of 2010, there were 987 people, 388 households, and 255 families living in the city. The population density was . There were 424 housing units at an average density of . The racial makeup of the city was 96.3% White, 0.6% African American, 0.2% Asian, 0.9% from other races, and 2.0% from two or more races. Hispanic or Latino of any race were 3.6% of the population. There were 388 households, of which 33.2% had children under the age of 18 living with them, 48.7% were married couples ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Minnesota
The University of Minnesota, formally the University of Minnesota, Twin Cities, (UMN Twin Cities, the U of M, or Minnesota) is a public university, public Land-grant university, land-grant research university in the Minneapolis–Saint Paul, Twin Cities of Minneapolis and Saint Paul, Minnesota, United States. The Twin Cities campus comprises locations in Minneapolis and Falcon Heights, Minnesota, Falcon Heights, a suburb of St. Paul, approximately apart. The Twin Cities campus is the oldest and largest in the University of Minnesota system and has the List of United States university campuses by enrollment, ninth-largest main campus student body in the United States, with 52,376 students at the start of the 2021–22 academic year. It is the Flagship#Colleges and universities in the United States, flagship institution of the University of Minnesota System, and is organized into 19 colleges, schools, and other major academic units. The Minnesota Territorial Legislature drafted a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agrilus Bilineatus
''Agrilus bilineatus'', the two-lined chestnut borer, is a species of metallic wood-boring beetle in the family Buprestidae Buprestidae is a family of beetles known as jewel beetles or metallic wood-boring beetles because of their glossy iridescent colors. Larvae of this family are known as flatheaded borers. The family is among the largest of the beetles, with some .... It is native to North America, and has been introduced to Turkey. References Further reading * * * External links * bilineatus Articles created by Qbugbot Beetles described in 1801 {{agrilus-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthur Gordon Ruggles
Arthur is a common male given name of Brythonic origin. Its popularity derives from it being the name of the legendary hero King Arthur. The etymology is disputed. It may derive from the Celtic ''Artos'' meaning “Bear”. Another theory, more widely believed, is that the name is derived from the Roman clan '' Artorius'' who lived in Roman Britain for centuries. A common spelling variant used in many Slavic, Romance, and Germanic languages is Artur. In Spanish and Italian it is Arturo. Etymology The earliest datable attestation of the name Arthur is in the early 9th century Welsh-Latin text '' Historia Brittonum'', where it refers to a circa 5th to 6th-century Briton general who fought against the invading Saxons, and who later gave rise to the famous King Arthur of medieval legend and literature. A possible earlier mention of the same man is to be found in the epic Welsh poem '' Y Gododdin'' by Aneirin, which some scholars assign to the late 6th century, though this is still a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornell University
Cornell University is a private statutory land-grant research university based in Ithaca, New York. It is a member of the Ivy League. Founded in 1865 by Ezra Cornell and Andrew Dickson White, Cornell was founded with the intention to teach and make contributions in all fields of knowledge—from the classics to the sciences, and from the theoretical to the applied. These ideals, unconventional for the time, are captured in Cornell's founding principle, a popular 1868 quotation from founder Ezra Cornell: "I would found an institution where any person can find instruction in any study." Cornell is ranked among the top global universities. The university is organized into seven undergraduate colleges and seven graduate divisions at its main Ithaca campus, with each college and division defining its specific admission standards and academic programs in near autonomy. The university also administers three satellite campuses, two in New York City and one in Educatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Henry Comstock
John Henry Comstock (February 24, 1849 – March 20, 1931) was an eminent researcher in entomology and arachnology and a leading educator. His work provided the basis for classification of butterflies, moths, and scale insects. Early life and education Comstock was born on February 24, 1849 in Janesville, Wisconsin. He studied at Cornell University, graduating in 1874. He also studied at Yale University and the University of Leipzig. In 1878 he married Anna Botsford. She was a wood engraver who beautifully illustrated many of his articles. Comstock became a professor of Nature Studies at Cornell. Career Comstock worked as an instructor at Cornell until 1879. He worked at Vassar College from 1877 to 1879. Between 1879 and 1881 he became the chief Entomologist of the USDA in Washington, D.C. In 1882 he became professor of Entomology and Invertebrate Zoology at Cornell. He also did work in insect morphology and is best known as the co-proposer of the Comstock-Needham system w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vito Volterra
Vito Volterra (, ; 3 May 1860 – 11 October 1940) was an Italian mathematician and physicist, known for his contributions to mathematical biology and integral equations, being one of the founders of functional analysis. Biography Born in Ancona, then part of the Papal States, into a very poor Jewish family: his father was Abramo Volterra and his mother, Angelica Almagià. Abramo Volterra died in 1862 when Vito was two years old. The family moved to Turin, and then to Florence, where he studied at the Dante Alighieri Technical School and the Galileo Galilei Technical Institute. Volterra showed early promise in mathematics before attending the University of Pisa, where he fell under the influence of Enrico Betti, and where he became professor of rational mechanics in 1883. He immediately started work developing his theory of functionals which led to his interest and later contributions in integral and integro-differential equations. His work is summarised in his book ''Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ohm's Law
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance, one arrives at the usual mathematical equation that describes this relationship: :I = \frac, where is the current through the conductor, ''V'' is the voltage measured ''across'' the conductor and ''R'' is the resistance of the conductor. More specifically, Ohm's law states that the ''R'' in this relation is constant, independent of the current. If the resistance is not constant, the previous equation cannot be called ''Ohm's law'', but it can still be used as a definition of static/DC resistance. Ohm's law is an empirical relation which accurately describes the conductivity of the vast majority of electrically conductive materials over many orders of magnitude of current. However some materials do not obey Ohm's law; these are called non-ohmic. The law was named after the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1889 Births
Events January–March * January 1 ** The total solar eclipse of January 1, 1889 is seen over parts of California and Nevada. ** Paiute spiritual leader Wovoka experiences a vision, leading to the start of the Ghost Dance movement in the Dakotas. * January 4 – An Act to Regulate Appointments in the Marine Hospital Service of the United States is signed by President Grover Cleveland. It establishes a Commissioned Corps of officers, as a predecessor to the modern-day U.S. Public Health Service Commissioned Corps. * January 5 – Preston North End F.C. is declared the winner of the inaugural Football League in England. * January 8 – Herman Hollerith receives a patent for his electric tabulating machine in the United States. * January 15 – The Coca-Cola Company is originally incorporated as the Pemberton Medicine Company in Atlanta, Georgia. * January 22 – Columbia Phonograph is formed in Washington, D.C. * January 30 – Rudolf, Crown Prince of Austria a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1939 Deaths
This year also marks the start of the Second World War, the largest and deadliest conflict in human history. Events Below, the events of World War II have the "WWII" prefix. January * January 1 ** Third Reich *** Jews are forbidden to work with Germans. *** The Youth Protection Act was passed on April 30, 1938 and the Working Hours Regulations came into effect. *** The Jews name change decree has gone into effect. ** The rest of the world *** In Spain, it becomes a duty of all young women under 25 to complete compulsory work service for one year. *** First edition of the Vienna New Year's Concert. *** The company of technology and manufacturing scientific instruments Hewlett-Packard, was founded in a garage in Palo Alto, California, by William (Bill) Hewlett and David Packard. This garage is now considered the birthplace of Silicon Valley. *** Sydney, in Australia, records temperature of 45 ˚C, the highest record for the city. *** Philipp Etter took over ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Minnesota Alumni
A university () is an institution of higher (or tertiary) education and research which awards academic degrees in several academic disciplines. ''University'' is derived from the Latin phrase ''universitas magistrorum et scholarium'', which roughly means "community of teachers and scholars". Universities typically offer both undergraduate and postgraduate programs. The first universities in Europe were established by Catholic Church monks. The University of Bologna (), Italy, which was founded in 1088, is the first university in the sense of: *being a high degree-awarding institute. *using the word ''universitas'' (which was coined at its foundation). *having independence from the ecclesiastic schools and issuing secular as well as non-secular degrees (with teaching conducted by both clergy and non-clergy): grammar, rhetoric, logic, theology, canon law, notarial law.Hunt Janin: "The university in medieval life, 1179–1499", McFarland, 2008, , p. 55f.de Ridder-Symoens, Hilde''A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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