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1949 In Science
The year 1949 in science and technology involved some significant events, listed below. Astronomy and space exploration * June 14 – Albert II, a rhesus monkey, becomes the first mammal in space, in a U.S.-launched V-2 rocket, reaching an altitude of 83 miles (134 km) but dying on impact after a parachute failure. Chemistry * Radiocarbon dating technique discovered by Willard Libby and his colleagues at the University of Chicago—work for which Libby will receive the Nobel prize in 1960. * A group including Dorothy Hodgkin publish the three-dimensional molecular structure of penicillin, demonstrating that it contains a β-lactam ring. Computer science * April – Manchester Mark 1 computer operable at the University of Manchester in England. * May 6 – EDSAC, the first practicable stored-program computer, runs its first program at University of Cambridge in England, to calculate a table of squares. Earth sciences * August 5 – Ambato earthquake in Ecuador, measuring ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science
Science is a systematic endeavor that builds and organizes knowledge in the form of testable explanations and predictions about the universe. Science may be as old as the human species, and some of the earliest archeological evidence for scientific reasoning is tens of thousands of years old. The earliest written records in the history of science come from Ancient Egypt and Mesopotamia in around 3000 to 1200 BCE. Their contributions to mathematics, astronomy, and medicine entered and shaped Greek natural philosophy of classical antiquity, whereby formal attempts were made to provide explanations of events in the physical world based on natural causes. After the fall of the Western Roman Empire, knowledge of Greek conceptions of the world deteriorated in Western Europe during the early centuries (400 to 1000 CE) of the Middle Ages, but was preserved in the Muslim world during the Islamic Golden Age and later by the efforts of Byzantine Greek scholars who brought Greek ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Cambridge
, mottoeng = Literal: From here, light and sacred draughts. Non literal: From this place, we gain enlightenment and precious knowledge. , established = , other_name = The Chancellor, Masters and Scholars of the University of Cambridge , type = Public research university , endowment = £7.121 billion (including colleges) , budget = £2.308 billion (excluding colleges) , chancellor = The Lord Sainsbury of Turville , vice_chancellor = Anthony Freeling , students = 24,450 (2020) , undergrad = 12,850 (2020) , postgrad = 11,600 (2020) , city = Cambridge , country = England , campus_type = , sporting_affiliations = The Sporting Blue , colours = Cambridge Blue , website = , logo = University of Cambridge logo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mood Stabilizer
A mood stabilizer is a psychiatric medication used to treat mood disorders characterized by intense and sustained mood shifts, such as bipolar disorder and the bipolar type of schizoaffective disorder. Uses Mood stabilizers are best known for the treatment of bipolar disorder, preventing mood shifts to mania (or hypomania) and depression. Mood stabilizers are also used in schizoaffective disorder when it is the bipolar type. Examples The term "mood stabilizer" does not describe a mechanism, but rather an effect. More precise terminology based on pharmacology is used to further classify these agents. Drugs commonly classed as mood stabilizers include: Mineral * Lithium – Lithium is the "classic" mood stabilizer, the first to be approved by the US FDA, and still popular in treatment. Therapeutic drug monitoring is required to ensure lithium levels remain in the therapeutic range: 0.6 or 0.8-1.2 mEq/L (or millimolar). Signs and symptoms of toxicity include nausea, vomiting, diar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Cade
John Frederick Joseph Cade AO (18 January 1912 – 16 November 1980) was an Australian psychiatrist who in 1948 discovered the effects of lithium carbonate as a mood stabilizer in the treatment of bipolar disorder, then known as manic depression. At a time when the standard treatments for psychosis were electroconvulsive therapy and lobotomy, lithium had the distinction of being the first effective medication available to treat a mental illness. Early life John Cade was born in Murtoa,Some authors state Cade was born in Horsham, one of the larger towns in the Wimmera area. However other authors, notably Cade's son Jack Cade, state John Cade was born in Murtoa, a town NE of Horsham. in the Wimmera region of Victoria, Australia. John's father David was Murtoa's general practitioner. Ellen, John's mother, and younger brothers David and Frank completed the family. When John was a small boy, his father left for World War I and served in Gallipoli and France. On return from t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australians
Australians, colloquially known as Aussies, are the citizens, nationals and individuals associated with the country of Australia. This connection may be residential, legal, historical or ethno-cultural. For most Australians, several (or all) of these connections exist and are collectively the source of their being Australian. Australian law does not provide for a racial or ethnic component of nationality, instead relying on citizenship as a legal status. Since the postwar period, Australia has pursued an official policy of multiculturalism and has the world's eighth-largest immigrant population, with immigrants accounting for 30 percent of the population in 2019. Between European colonisation in 1788 and the Second World War, the vast majority of settlers and immigrants came from the British Isles (principally England, Ireland and Scotland), although there was significant immigration from China and Germany during the 19th century. Many early settlements were initially pen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lithium (medication)
Certain lithium compounds, also known as lithium salts, are used as psychiatric medication, primarily for bipolar disorder and for major depressive disorder. In these disorders, it sometimes reduces the risk of suicide. Lithium is taken orally. Common side effects include increased urination, shakiness of the hands, and increased thirst. Serious side effects include hypothyroidism, diabetes insipidus, and lithium toxicity. Blood level monitoring is recommended to decrease the risk of potential toxicity. If levels become too high, diarrhea, vomiting, poor coordination, sleepiness, and ringing in the ears may occur. Lithium is teratogenic, especially during the first trimester of pregnancy and at higher dosages. The use of lithium while breastfeeding is controversial; however, many international health authorities advise against it, and the long-term outcomes of perinatal lithium exposure have not been studied. The American Academy of Pediatrics lists lithium as contraindicat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
6174
6174 is known as Kaprekar's constant after the Indian mathematician D. R. Kaprekar. This number is renowned for the following rule: # Take any four-digit number, using at least two different digits (leading zeros are allowed). # Arrange the digits in descending and then in ascending order to get two four-digit numbers, adding leading zeros if necessary. # Subtract the smaller number from the bigger number. # Go back to step 2 and repeat. The above process, known as Kaprekar's routine, will always reach its fixed point, 6174, in at most 7 iterations. Hanover 2017, p. 1, Overview. Once 6174 is reached, the process will continue yielding 7641 – 1467 = 6174. For example, choose 1459: :9541 – 1459 = 8082 :8820 – 0288 = 8532 :8532 – 2358 = 6174 :7641 – 1467 = 6174 The only four-digit numbers for which Kaprekar's routine does not reach 6174 are repdigits such as 1111, which give the result 0000 after a single iteration. All other four-digit numbers eventually reach 6174 if ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Császár Polyhedron
In geometry, the Császár polyhedron () is a nonconvex toroidal polyhedron with 14 triangular faces. This polyhedron has no diagonals; every pair of vertices is connected by an edge. The seven vertices and 21 edges of the Császár polyhedron form an embedding of the complete graph onto a topological torus. Of the 35 possible triangles from vertices of the polyhedron, only 14 are faces. Complete graph The tetrahedron and the Császár polyhedron are the only two known polyhedra (having a manifold boundary) without any diagonals: every two vertices of the polygon are connected by an edge, so there is no line segment between two vertices that does not lie on the polyhedron boundary. That is, the vertices and edges of the Császár polyhedron form a complete graph. The combinatorial description of this polyhedron has been described earlier by Möbius. Three additional different polyhedra of this type can be found in a paper by Bokowski, J. and Eggert, A. If the boundary of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ákos Császár
Ákos Császár ( hu, Császár Ákos, ) (26 February 1924, Budapest – 14 December 2017, Budapest) was a Hungarian mathematician, specializing in general topology and real analysis. He discovered the Császár polyhedron, a nonconvex polyhedron without diagonals. He introduced the notion of syntopogeneous spaces, a generalization of topological spaces. During the end of 1944 his grandfather lost his life during the siege of Budapest. Then his father, older brother and himself were arrested by the Germans and sent to a concentration camp approximatively 45 miles east of Budapest. An infectious illness spread in the camp, and his brother and father died, but Ákos survived. He is a member of the group of five students of the late professor Lipót Fejér who called them "The Big Five". The other four are John Horvath, János Aczél, Steven Gaal and László Fuchs, all of whom are now retired mathematics professors in North America. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herbert Butterfield
Sir Herbert Butterfield (7 October 1900 – 20 July 1979) was an English historian and philosopher of history, who was Regius Professor of Modern History and Vice-Chancellor of the University of Cambridge. He is remembered chiefly for a short volume early in his career entitled ''The Whig Interpretation of History'' (1931) and for his ''Origins of Modern Science'' (1949). Butterfield turned increasingly to historiography and man's developing view of the past. Butterfield was a devout Christian and reflected at length on Christian influences in historical perspectives. Butterfield thought that individual personalities were more important than great systems of government or economics in historical study. His Christian beliefs in personal sin, salvation and providence were a great influence in his writings, a fact he freely admitted. At the same time, Butterfield's early works emphasised the limits of a historian's moral conclusions, "If history can do anything it is to remind u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patomskiy Crater
The Patomskiy crater or Patom crater (russian: Патомский кратер, ''Patomskiy Krater''), also known as , ''Konus Kolpakova'' "Kolpakov cone") is a peculiar rock formation located in the Bodaibo District of the Irkutsk region of southeastern Siberia, from the district center Bodaibo. It is a large mound made of shattered limestone blocks on the slopes of the Patom Highlands in an area of dense taiga. Its base diameter is about and its height about ; the cone's crown is ring-shaped, and in its center there is a smaller mound with a height of about . The volume of the crater is estimated as , with a weight of about one million tons. The Patomskiy crater was discovered in 1949 by Russian geologist Vadim Kolpakov. Its origins have been subject of intense scientific interest, with hypotheses including meteorite, volcanic and gaseous origin, but to date no definite proof has been given. Through dendrochronology, the age of the crater is estimated to be 300 years old. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Geological Survey
The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization's work spans the disciplines of biology, geography, geology, and hydrology. The USGS is a fact-finding research organization with no regulatory responsibility. The agency was founded on March 3, 1879. The USGS is a bureau of the United States Department of the Interior; it is that department's sole scientific agency. The USGS employs approximately 8,670 people and is headquartered in Reston, Virginia. The USGS also has major offices near Lakewood, Colorado, at the Denver Federal Center, and Menlo Park, California. The current motto of the USGS, in use since August 1997, is "science for a changing world". The agency's previous slogan, adopted on the occasion of its hundredt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
