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1808 In Science
The year 1808 in science and technology involved some significant events, listed below. Astronomy * December 9 (20:34 UTC) – Mercury occults Saturn (not known at this time). Chemistry * Barium, calcium, magnesium, and strontium isolated by Humphry Davy. * Joseph Louis Gay-Lussac formulates the law of combining volumes for gases. * John Dalton begins publication of ''A New System of Chemical Philosophy'', explaining his atomic theory of chemistry and including a list of atomic weights. * Jöns Jakob Berzelius publishes ''Lärbok i Kemien'' in which he proposes modern chemical symbols and notation, and of the concept of relative atomic weight. Mathematics * French mathematician Christian Kramp introduces the notation ''n''! in factorials. * German mathematician Carl Friedrich Gauss publishes ''Theorematis arithmetici demonstratio nova'', introducing Gauss's lemma in the third proof of quadratic reciprocity. * Irish American mathematician Robert Adrain produces a formu ... [...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] |
Factorial
In mathematics, the factorial of a non-negative denoted is the product of all positive integers less than or equal The factorial also equals the product of n with the next smaller factorial: \begin n! &= n \times (n-1) \times (n-2) \times (n-3) \times \cdots \times 3 \times 2 \times 1 \\ &= n\times(n-1)!\\ \end For example, 5! = 5\times 4! = 5 \times 4 \times 3 \times 2 \times 1 = 120. The value of 0! is 1, according to the convention for an empty product. Factorials have been discovered in several ancient cultures, notably in Indian mathematics in the canonical works of Jain literature, and by Jewish mystics in the Talmudic book '' Sefer Yetzirah''. The factorial operation is encountered in many areas of mathematics, notably in combinatorics, where its most basic use counts the possible distinct sequences – the permutations – of n distinct objects: there In mathematical analysis, factorials are used in power series for the exponential function an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jesse Fell
Jesse Fell was an early political leader in Wilkes-Barre, Pennsylvania. He was one of the first Pennsylvanians to successfully burn anthracite on an open air grate. Anthracite differs from wood in that it needs a draft from the bottom, and Judge Fell proved with his grate design that it was a viable heating fuel. His method and 'discovery' in 1808 led to the widespread use of coal as the fuel source that helped to foster America's industrial revolution The Industrial Revolution was the transition to new manufacturing processes in Great Britain, continental Europe, and the United States, that occurred during the period from around 1760 to about 1820–1840. This transition included going f .... He lived in the Fell House and Tavern until his death. The House stood until the 1980s when Wyoming Valley Health Care demolished it to build a parking lot. The bricks used to build the house are now in the house of Wayne Segar in Bear Creek Pennsylvania. The grate used by Fell is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anthracite
Anthracite, also known as hard coal, and black coal, is a hard, compact variety of coal that has a submetallic luster. It has the highest carbon content, the fewest impurities, and the highest energy density of all types of coal and is the highest ranking of coals. Anthracite is the most metamorphosed type of coal (but still represents low-grade metamorphism), in which the carbon content is between 86% and 97%. The term is applied to those varieties of coal which do not give off tarry or other hydrocarbon vapours when heated below their point of ignition. Anthracite ignites with difficulty and burns with a short, blue, and smokeless flame. Anthracite is categorized into standard grade, which is used mainly in power generation, high grade (HG) and ultra high grade (UHG), the principal uses of which are in the metallurgy sector. Anthracite accounts for about 1% of global coal reserves, and is mined in only a few countries around the world. The Coal Region of northeastern Pen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander Von Humboldt
Friedrich Wilhelm Heinrich Alexander von Humboldt (14 September 17696 May 1859) was a German polymath, geographer, naturalist, explorer, and proponent of Romantic philosophy and science. He was the younger brother of the Prussian minister, philosopher, and linguist Wilhelm von Humboldt (1767–1835). Humboldt's quantitative work on botanical geography laid the foundation for the field of biogeography. Humboldt's advocacy of long-term systematic geophysical measurement laid the foundation for modern geomagnetic and meteorological monitoring. Between 1799 and 1804, Humboldt travelled extensively in the Americas, exploring and describing them for the first time from a modern Western scientific point of view. His description of the journey was written up and published in several volumes over 21 years. Humboldt was one of the first people to propose that the lands bordering the Atlantic Ocean were once joined (South America and Africa in particular). Humboldt resurrected the use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edinburgh
Edinburgh ( ; gd, Dùn Èideann ) is the capital city of Scotland and one of its 32 Council areas of Scotland, council areas. Historically part of the county of Midlothian (interchangeably Edinburghshire before 1921), it is located in Lothian on the southern shore of the Firth of Forth. Edinburgh is Scotland's List of towns and cities in Scotland by population, second-most populous city, after Glasgow, and the List of cities in the United Kingdom, seventh-most populous city in the United Kingdom. Recognised as the capital of Scotland since at least the 15th century, Edinburgh is the seat of the Scottish Government, the Scottish Parliament and the Courts of Scotland, highest courts in Scotland. The city's Holyrood Palace, Palace of Holyroodhouse is the official residence of the Monarchy of the United Kingdom, British monarchy in Scotland. The city has long been a centre of education, particularly in the fields of medicine, Scots law, Scottish law, literature, philosophy, the sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wernerian Natural History Society
The Wernerian Natural History Society (12 January 1808 – 16 April 1858), commonly abbreviated as the Wernerian Society, was a learned society interested in the broad field of natural history, and saw papers presented on various topics such as mineralogy, plants, insects, and scholarly expeditions. The Society was an offshoot of the Royal Society of Edinburgh, and from its beginnings it was a rather elite organization. The Society was named after Abraham Gottlob Werner, a German geologist who was a creator of Neptunism, a theory of superposition based on a receding primordial ocean that had deposited all the rocks in the crust.Scholarly Societies Project , Wernerian Natural History Society. At this time all rocks, including |
Johann Christian Reil
Johann Christian Reil (20 February 1759 – 22 November 1813) was a German physician, physiologist, anatomist, and psychiatrist. He coined the term psychiatry – ''Psychiatrie'' in German – in 1808. Medical conditions and anatomical features named after him include Reil's finger (later called ''digitus mortuus'' or Raynaud syndrome) and the Islands of Reil in the cerebral cortex. In 1809, he was the first to describe the white fibre tract now called the arcuate fasciculus.Catani M, Mesulam M. (2008). The arcuate fasciculus and the disconnection theme in language and aphasia: history and current state. Cortex. 44(8):953-61. He is frequently and erroneously crediting with discovering the locus coeruleus,Maeda T. (2000). The Locus coeruleus: history. Journal of Chemical Neuroanatomy. 18:57–64. which was first described by Félix Vicq-d'Azyr. In 1779 and 1780, Reil became acquainted with the scientist Johann Friedrich Blumenbach while Reil was studying medicine in Götting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psychiatry
Psychiatry is the medical specialty devoted to the diagnosis, prevention, and treatment of mental disorders. These include various maladaptations related to mood, behaviour, cognition, and perceptions. See glossary of psychiatry. Initial psychiatric assessment of a person typically begins with a case history and mental status examination. Physical examinations and psychological tests may be conducted. On occasion, neuroimaging or other neurophysiological techniques are used. Mental disorders are often diagnosed in accordance with clinical concepts listed in diagnostic manuals such as the ''International Classification of Diseases'' (ICD), edited and used by the World Health Organization (WHO) and the widely used '' Diagnostic and Statistical Manual of Mental Disorders'' (DSM), published by the American Psychiatric Association (APA). The fifth edition of the DSM (DSM-5) was published in May 2013 which re-organized the larger categories of various diseases and expanded upon the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Least Squares
The method of least squares is a standard approach in regression analysis to approximate the solution of overdetermined systems (sets of equations in which there are more equations than unknowns) by minimizing the sum of the squares of the residuals (a residual being the difference between an observed value and the fitted value provided by a model) made in the results of each individual equation. The most important application is in data fitting. When the problem has substantial uncertainties in the independent variable (the ''x'' variable), then simple regression and least-squares methods have problems; in such cases, the methodology required for fitting errors-in-variables models may be considered instead of that for least squares. Least squares problems fall into two categories: linear or ordinary least squares and nonlinear least squares, depending on whether or not the residuals are linear in all unknowns. The linear least-squares problem occurs in statistical regressio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Adrain
Robert Adrain (30 September 1775 – 10 August 1843) was an Irish political exile who won renown as a mathematician in the United States. He left Ireland after leading republican insurgents in the Rebellion of 1798, and settled in New Jersey and Pennsylvania. With Nathaniel Bowditch, he shares the distinction of being the first scholar to publish original mathematical research in America. This included his formulation of the method of least squares while working on a surveying problem (in two proofs of the exponential law of error published independently of Carl Friedrich Gauss) for which he is chiefly remembered. His fields of applied mathematical interest included physics, astronomy and geodesy. Many of his mathematical investigations focussed on the shape of the Earth. Biography Adrian was born in Carrickfergus, County Antrim, Ireland. His father, of French Huguenot descent, was a school teacher and maker of mathematical instruments, and he apparently received a good educatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irish American
, image = Irish ancestry in the USA 2018; Where Irish eyes are Smiling.png , image_caption = Irish Americans, % of population by state , caption = Notable Irish Americans , population = 36,115,472 (10.9%) alone or in combination 10,899,442 (3.3%) Irish alone 33,618,500(10.1%) alone or in combination 9,919,263 (3.0%) Irish alone , popplace = Boston New York City Scranton Philadelphia New Orleans Pittsburgh Cleveland Chicago Baltimore Detroit Milwaukee Louisville New England Delaware Valley Coal Region Los Angeles Las Vegas Atlanta Sacramento San Diego Houston Dallas San Francisco Palm Springs, California Fairbanks and most urban areas , langs = English ( American English dialects); a scant speak Irish , rels = Protestant (51%) Catholic (36%) Other (3%) No religion (10%) (2006) , related = Anglo-Irish people Breton Americans Cornish Americans English Americans Irish Aust ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
