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John Kenneth Iliffe (18 September 1931 – 16 February 2020) was a British computer designer who worked on the design and evaluation of computers that supported fine-grained memory protection and object management. He implemented, evaluated and refined such designs in the Rice Institute Computer, R1 (1958–61) and the ICL Basic Language Machine (1963–68). A key feature in the architectures of both machines was control by the hardware of the formation and use of memory references so that the memory could be seen as a collection of data objects of defined sizes whose integrity is protected from the consequences of errors in address calculation, such as overrunning memory pointers (whether by accident or malicious intent).
https://en.wikipedia.org/wiki?curid=60155126
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2018 research in which Hayman collaborated, developed a model framework to assist in understanding how the effect of human encroachment into natural habitats is related to the emergence of novel infectious diseases. The paper concluded that such frameworks provide guiding principles for policymakers when developing land-use strategies that "enable common ground to be established between species conservation and novel disease emergence risk mitigation...[and results]...suggest that it is possible to identify high-risk areas for the mitigation and surveillance of novel disease emergence and that mitigation measures may reduce this risk while conserving biodiversity." This research assumed significance during COVID-19 because, while researchers internationally agreed that the pandemic was likely to have been the caused after one person was infected with the virus from an animal, the risk of infectious disease emergence from wildlife and pandemics was determined largely by human behaviours such as urbanization, changes in diet and agricultural practices as a result of increases in population numbers. The research aimed to inform early warning and preparedness by identifying processes that "increase disease emergence risk and locations where this is occurring."
https://en.wikipedia.org/wiki?curid=70083782
2,151,601
2,085,779
The Kryoneri Observatory was established in 1972. It is located in the district of Corinth in the northern Peloponnese at the top of mount Kyllini, close to Kryoneri village. It is equipped with a 1.2 m Cassegrain reflector telescope manufactured and installed on the site in 1975 by the British company Grubb Parsons Co., Newcastle. It was one of the largest telescopes in Greece, with many successful scientific observations during the past 35 years. The availability of other more modern facilities prompted phasing out the wide science use of the telescope. In 2014 a process of making an upgrade to the mechanics and electronics of the telescope begun, in order to facilitate the remote usage of the site for dedicated projects, such as the Near Earth Object via lunar impact monitoring project (NELIOTA) as well as for public outreach and educational purposes.
https://en.wikipedia.org/wiki?curid=41747232
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Mannitol is one of the most abundant energy and carbon storage molecules in nature, produced by a plethora of organisms, including bacteria, yeasts, fungi, algae, lichens, and many plants. Fermentation by microorganisms is an alternative to the traditional industrial synthesis. A fructose to mannitol metabolic pathway, known as the mannitol cycle in fungi, has been discovered in a type of red algae ("Caloglossa leprieurii"), and it is highly possible that other microorganisms employ similar such pathways. A class of lactic acid bacteria, labeled heterofermentive because of their multiple fermentation pathways, convert either three fructose molecules or two fructose and one glucose molecule into two mannitol molecules, and one molecule each of lactic acid, acetic acid, and carbon dioxide. Feedstock syrups containing medium to large concentrations of fructose (for example, cashew apple juice, containing 55% fructose: 45% glucose) can produce yields mannitol per liter of feedstock. Further research is being conducted, studying ways to engineer even more efficient mannitol pathways in lactic acid bacteria, as well as the use of other microorganisms such as yeast and "E. coli" in mannitol production. When food-grade strains of any of the aforementioned microorganisms are used, the mannitol and the organism itself are directly applicable to food products, avoiding the need for careful separation of microorganism and mannitol crystals. Although this is a promising method, steps are needed to scale it up to industrially needed quantities.
https://en.wikipedia.org/wiki?curid=1015846
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During the Battle of Crete, the Ju 87s also played a significant role. On 21–22 May 1941, the Germans attempted to send in reinforcements to Crete by sea but lost 10 vessels to "Force D" under the command of Rear Admiral Irvine Glennie. The force, consisting of the cruisers , and , forced the remaining German ships to retreat. The Stukas were called upon to deal with the British naval threat. On 21 May, the destroyer was sunk and the next day the battleship was damaged and the cruiser was sunk, with the loss of 45 officers and 648 ratings. The Ju 87s also crippled the cruiser that morning, (she was later finished off by Bf 109 fighter bombers) while sinking the destroyer with one hit. As the Battle of Crete drew to a close, the Allies began yet another withdrawal. On 23 May, the Royal Navy lost the destroyers and , followed by on 26 May; "Orion" and "Dido" were also severely damaged. "Orion" had been evacuating 1,100 soldiers to North Africa; 260 of them were killed and another 280 wounded.
https://en.wikipedia.org/wiki?curid=16590
330,151
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Since 2016, Indian Railways has pushed for greater electrification of the railway network. In this interest, the government, in 2019, approved plans for 100% electrification. So far Indian Railways has electrified 52,247 route kilometers (RKM) that is about 80% of the total broad gauge network of Indian Railways (65,414 RKM, including Konkan Railway) by 31 March 2022. Using electric locomotives allows the railways to save time by giving a faster acceleration and also saves fuel costs. However, these advantages are offset under certain circumstances where the route of the train is partly electrified. In such cases, trains used to run with a diesel locomotive in non-electrified sections and would be switched with an electric locomotive as soon as they enter an electrified section. Instead of the benefits of electrification, Railways observed a loss of punctuality in such trains due to valuable time being lost to switch between diesel and electric locomotives. To counter this, in August 2019, Railways issued a circular, asking all zones to haul trains with a diesel locomotive if their route was not completely electrified. This meant that electrification of railway lines, unless completed end-to-end, did not provide any advantage. This problem had been identified by the Railways, way back in 2016, which is when RDSO was requested to study the feasibility of dual-mode locomotives as a stop-gap until 100% electrification was achieved.
https://en.wikipedia.org/wiki?curid=63921932
1,134,429
1,234,546
The imager was an intensified Thompson CCD camera with a six position filter wheel. The set of filters consisted of a broad-band filter with a bandpass of 400 to 800 nm, four narrow-band filters with center wavelengths (and bandpass width (FWHM)) of 415 nm (40 nm), 560 nm (10 nm), 650 nm (10 nm), and 750 nm (20 nm), and 1 opaque cover to protect the image intensifier. The field of view was 0.3 x 0.4 degrees, translating to a width of about 2 km at a nominal lunar altitude of 400 km. The image array is 288 × 384 pixels, (pixel size of 23 × 23 micrometers) so the pixel resolution at the Moon was 7–20 m depending on the spacecraft altitude. (At Geographos the resolution would have been <5 m at closest approach.) The clear aperture was 131 mm and the focal length was 1250 mm. The nominal imaging rate was about 10 frames per second in individual image bursts covering all filters at the Moon. The high resolution and small field of view only allowed coverage of selected areas of the Moon, in the form of either long, narrow strips of a single color or shorter strips of up to four colors. The instrument has a signal to noise ratio of 13 to 41 depending on the albedo and phase angle, with a 1% relative calibration and a 20% absolute calibration, and a dynamic range of 2000.
https://en.wikipedia.org/wiki?curid=82872
1,233,883
134,024
Tetrapoda includes four living classes: amphibians, reptiles, mammals, and birds. Overall, the biodiversity of lissamphibians, as well as of tetrapods generally, has grown exponentially over time; the more than 30,000 species living today are descended from a single amphibian group in the Early to Middle Devonian. However, that diversification process was interrupted at least a few times by major biological crises, such as the Permian–Triassic extinction event, which at least affected amniotes. The overall composition of biodiversity was driven primarily by amphibians in the Palaeozoic, dominated by reptiles in the Mesozoic and expanded by the explosive growth of birds and mammals in the Cenozoic. As biodiversity has grown, so has the number of species and the number of niches that tetrapods have occupied. The first tetrapods were aquatic and fed primarily on fish. Today, the Earth supports a great diversity of tetrapods that live in many habitats and subsist on a variety of diets. The following table shows summary estimates for each tetrapod class from the "IUCN Red List of Threatened Species", 2014.3, for the number of extant species that have been described in the literature, as well as the number of threatened species.
https://en.wikipedia.org/wiki?curid=60560
133,969
1,767,447
In December 2007, after two years of resisting the AFL's push for their relocation, the Kangaroos finally officially rejected the AFL's $100 million proposal. This was despite threats from the league to pull financial assistance from the club and cancel the Gold Coast home game agreement if they don't move. The failure of the AFL to secure a stadium deal for Carrara with the Queensland Government was seen as one of the deciding factors. A consortium was selected by the AFL in early 2008 and the GC17 set out to make an official bid for the licence with criteria defined by the league. The Queensland government finally committed to funding for a stadium in early 2009 after which the AFL was granted a provisional licence pending further federal government funding. In 2010 The Gold Coast Suns were created and entered a team in the NEAFL. In 2011 they made their debut playing in the AFL and vindicated the investment in creating the new AFL side by outdrawing the rival football codes on the coast.
https://en.wikipedia.org/wiki?curid=3362955
1,766,453
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In 1904, Richard Küch discovered that evaporated quicksilver (mercury) in a quartz tube acted as an intense light source when stimulated with electricity. In light of this discovery, Heraeus joined forces with AEG and founded a quartz lamp company, culminating in the development of the ‘Original Hanau Synthetic Sunlamp’ which flooded onto the German market as early as the 1930s. By the 1950s, the tanning lamp had become a popular consumer electronics item. After buying out AEG in 1973, a number of newly developed products were added to the range. Heraeus Noblelight now supplies infrared and ultraviolet emitters as well as UV-LEDs to a variety of industries, for use in automotive production, printing, plastics and semiconductors, analytical instruments, laser and environmental technology in solariums, and water and air treatment.
https://en.wikipedia.org/wiki?curid=2511162
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By 1940 the US, while still neutral, was becoming the "Arsenal of Democracy" for the Allies, supplying money and war materials. Prime Minister Winston Churchill and President Roosevelt agreed to exchange 50 US destroyers for 99-year-leases to British military bases in Newfoundland and the Caribbean. The sudden defeat of France in spring 1940 caused the nation to begin to expand its armed forces, including the first peacetime draft. In preparation for expected German aggression against the Soviet Union, negotiations for better diplomatic relations began between Undersecretary of State Sumner Welles and Soviet Ambassador to the United States Konstantin Umansky. After the German invasion of the Soviet Union in June 1941, America began sending Lend Lease aid to the Soviet Union as well as Britain and China. Although President Franklin D. Roosevelt's advisers warned that the Soviet Union would collapse from the Nazi advance within weeks, he barred Congress from blocking aid to the Soviet Union on the advice of Harry Hopkins. In August 1941, President Roosevelt and Prime Minister Churchill met aboard the "USS Augusta" at Naval Station Argentia in Placentia Bay, Newfoundland, and produced the Atlantic Charter outlining mutual aims for a postwar liberalized international system.
https://en.wikipedia.org/wiki?curid=4653534
122,382
1,342,996
Ingber's work on tensegrity led him to propose that mechanical forces play as important a role in biological control as chemicals and genes do, and to investigate the molecular mechanism by which cells convert mechanical signals into changes in intracellular biochemistry and gene expression, a process known as "mechanotransduction." Ingber determined that living cells use tensegrity architecture to stabilize their shape and cytoskeleton, that cellular integrins function as mechanosensors on the cell surface, and that cytoskeletal tension (or "prestress," which is central to the stability of tensegrity structures) is a fundamental regulator of many cellular responses to mechanical cues. Ingber's tensegrity theory also led to the prediction in the early 1980s that changes in extracellular matrix structure and mechanics play a fundamental role in tissue and organ development, and that deregulation of this form of developmental control can promote cancer formation.
https://en.wikipedia.org/wiki?curid=29057341
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The Ministry of Science, Technology and Space funds thematic research centres and is responsible for international scientific co-operation. The Ministry's National Infrastructure Programme aims to create a critical mass of knowledge in national priority fields and to nurture the younger generation of scientists. Investment in the programme mainly takes the form of research grants, scholarships and knowledge centres. Over 80% of the ministry's budget is channelled towards research in academic institutions and research institutes, as well as towards revamping scientific infrastructure by upgrading existing research facilities and establishing new ones. In 2012, the ministry resolved to invest NIS 120 million over three years in four designated priority areas for research: brain science; supercomputing and cybersecurity; oceanography; and alternative transportation fuels. An expert panel headed by the Chief Scientist in the Ministry of Science, Technology and Space chose these four broad disciplines in the belief that they would be likely to exert the greatest practical impact on Israeli life in the near future.
https://en.wikipedia.org/wiki?curid=397525
595,546
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Regarding war, Rummel adopted the definition of a popular database, namely that war is a conflict causing at least 1,000 battle deaths. The peace is explained thus: "Start with the answer of the philosopher Immanuel Kant to why universalizing republics (democracy was a bad word for Classical Liberals in his time) would create a peaceful world. People would not support and vote for wars in which they and their loved ones could die and lose their property. But this is only partly correct, for the people can get aroused against nondemocracies and push their leaders toward war, as in the Spanish–American War. A deeper explanation is that where people are free, they create an exchange society of overlapping groups and multiple and crosschecking centers of power. In such a society a culture of negotiation, tolerance, and splitting differences develops. Moreover, free people develop an in-group orientation toward other such societies, a feeling of shared norms and ideals that militates against violence toward other free societies."
https://en.wikipedia.org/wiki?curid=356324
421,792
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A general purpose implementation of the once-only is the national Data Intermediation Platform (DIP), as a result of a collaboration effort involving the whole Spanish public sector. The DIP was launched in 2007 by the Spanish Government to publish and consume services for electronic data interchange with the aim to grow and to be re-used by all Administrations. Using the DIP with the SCSP protocol, public bodies in charge of administrative procedures can automatically check the required information without document submission by the citizens. The SCSP protocol is aimed to substitute paper certificates by electronic data exchanges and it defines a common structure for the messages and a governance model that considers four roles as result of two dimensions: data consumer/provider and business/technical actor. The Citizen's Folder is an online site where a citizen can access and see her/his data exchanges though the DIP. Since 2007, the number of data enquiry and verification services provided by the DIP has been growing dramatically, reaching almost 81 million of data transmissions in 2018 with 1191 public bodies involved (65 national bodies, 47 regional bodies, 11 institutional agencies, 1045 municipalities and 22 universities).
https://en.wikipedia.org/wiki?curid=56837703
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From this observation, Pettit, et al. concluded that the classical structure of the cyclooctatrienyl cation must be incorrect. Instead, the group proposed the structure of the bicyclo[5.1.0]octadienyl compound, theorizing that the cyclopropane bond located on the interior of the eight-membered ring must be subject to considerable delocalization, thus explaining the dramatic difference in observed chemical shift. Upon further consideration, Pettit was inclined to represent the compound as the "homotropylium ion," which shows the "internal cyclopropane" bond totally replaced by electron delocalization. This structure shows how delocalization is cyclic and involves 6 π electrons, consistent with Huckel's rule for aromaticity. The magnetic field of the NMR could thus induce a ring current in the ion, responsible for the significant differences in resonance between the exo and endo protons of this methylene bridge. Pettit, et al. thus emphasized the remarkable similarity between this compound and the aromatic tropylium ion, describing a new "homo-counterpart" to an aromatic species already known, precisely as predicted by Winstein.
https://en.wikipedia.org/wiki?curid=4404576
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On 17 March 1975, the proposed DES was published in the "Federal Register". Public comments were requested, and in the following year two open workshops were held to discuss the proposed standard. There was criticism received from public-key cryptography pioneers Martin Hellman and Whitfield Diffie, citing a shortened key length and the mysterious "S-boxes" as evidence of improper interference from the NSA. The suspicion was that the algorithm had been covertly weakened by the intelligence agency so that they—but no one else—could easily read encrypted messages. Alan Konheim (one of the designers of DES) commented, "We sent the S-boxes off to Washington. They came back and were all different." The United States Senate Select Committee on Intelligence reviewed the NSA's actions to determine whether there had been any improper involvement. In the unclassified summary of their findings, published in 1978, the Committee wrote:
https://en.wikipedia.org/wiki?curid=7978
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During his time at Columbia, Chargaff published numerous scientific papers, dealing primarily with the study of nucleic acids such as DNA using chromatographic techniques. He became interested in DNA in 1944 after Oswald Avery identified the molecule as the basis of heredity. Cohen says that "Almost alone among the scientists of this time, Chargaff accepted the unusual Avery paper and concluded that genetic differences among DNAs must be reflected in chemical differences among these substances. He was actually the first biochemist to reorganize his laboratory to test this hypothesis, which he went on to prove by 1949." Chargaff said of the Avery discovery: "I saw before me (in 1944), in dark contours, the beginning of a grammar of biology", and in 1950 he published a paper with the conclusion that the amounts of adenine and thymine in DNA were roughly the same, as were the amounts of cytosine and guanine. This later became known as the first of Chargaff's rules. Instrumental in his DNA discoveries were the innovation of paper chromatography, and the commercially-available ultraviolet spectrophotometer tool.
https://en.wikipedia.org/wiki?curid=235517
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There may be several meanings of "solving an equation". One may want to express the solutions as explicit numbers; for example, the unique solution of is . Unfortunately, this is, in general, impossible for equations of degree greater than one, and, since the ancient times, mathematicians have searched to express the solutions as algebraic expressions; for example, the golden ratio formula_45 is the unique positive solution of formula_46 In the ancient times, they succeeded only for degrees one and two. For quadratic equations, the quadratic formula provides such expressions of the solutions. Since the 16th century, similar formulas (using cube roots in addition to square roots), although much more complicated, are known for equations of degree three and four (see cubic equation and quartic equation). But formulas for degree 5 and higher eluded researchers for several centuries. In 1824, Niels Henrik Abel proved the striking result that there are equations of degree 5 whose solutions cannot be expressed by a (finite) formula, involving only arithmetic operations and radicals (see Abel–Ruffini theorem). In 1830, Évariste Galois proved that most equations of degree higher than four cannot be solved by radicals, and showed that for each equation, one may decide whether it is solvable by radicals, and, if it is, solve it. This result marked the start of Galois theory and group theory, two important branches of modern algebra. Galois himself noted that the computations implied by his method were impracticable. Nevertheless, formulas for solvable equations of degrees 5 and 6 have been published (see quintic function and sextic equation).
https://en.wikipedia.org/wiki?curid=23000
83,507
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Theologians sought to reconcile scripture, the book of God's word, with natural history, the book of God's works. Thomas Chalmers (a minister of the Scottish Kirk) popularised Gap creationism (or "interval" theory), a form of old Earth creationism that posits that the six-day creation as described in the Book of Genesis involved literal 24-hour days, but that there was a gap of time between two distinct creations in the first and the second verses of Genesis, explaining many scientific observations, including the age of the Earth. Chalmers' suggestion was supported by theological liberals, what Milton Millhauser referred to as the party of "reconciliation," such as Edward Hitchcock, W. D. Conybeare, and the future Cardinal Wiseman. Sharon Turner included it in his children's book "A Sacred History of the World." Millhauser wrote that "Its prestige was such that the "interval" theory presently became almost the official British rival to the continental one that interpreted the Six Days as six creative eras", adding his subjective estimate that "until about 1850, the casual pulpit or periodical assurance that geology does not conflict with revelation was based, in possibly seven instances out of ten, on Chalmers' "interval" theory."
https://en.wikipedia.org/wiki?curid=24068342
1,967,637
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The first graduates of the academy were Joseph Gardner Swift and Simeon Magruder Levy, who graduated on 12 October 1802. Swift would later return as Superintendent from 1812 to 1814. Alden Partridge, an 1806 graduate, served as Professor of Mathematics and Engineering, and was Acting Superintendent on occasions from 1808 to 1813. Partridge served as Superintendent from 1814 to 1817, and was responsible for selecting the gray uniforms students still wear today. The early years of the academy were a tumultuous time, with few standards for admission or length of study. Cadets ranged in age from 10 to 37 and attended between 6 months to 6 years. The impending War of 1812 caused Congress to authorize a more formal system of education at the academy, and increased the size of the Corps of Cadets to 250. By the War of 1812, only 89 officers had graduated, morale was low, and the academy was in danger of being disbanded. 1811 graduate George Ronan, assigned to duty at Fort Dearborn on the American frontier, was killed in the War of 1812 and became the first member of the Corps of Cadets to die in combat. Alden Partridge was accused of lax management and resigned his commission in 1818, unhappy at turning the Superintendent's position over to Sylvanus Thayer, who had been one of Partridge's students. Partridge went on to found Norwich University.
https://en.wikipedia.org/wiki?curid=20793344
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Pangea started to break up during the Triassic ≈225Ma. Rifting affected regions which became the central Atlantic (between North America and Africa) and the Gulf of Mexico at about the same time. This rifting created a divergent plate margin that would play an integral role of the future geologic processes to follow. Rifting, which involves the stretching of pre-existing crust and mantle lithosphere, was initiated by the existence of sufficient horizontal deviatoric tensional stress that broke the lithosphere. Eventually rifting gave way to sea floor spreading in the Atlantic and Gulf of Mexico in the mid Jurassic, around ≈165 Ma. Sea floor spreading is where new oceanic lithosphere is being created by upwelling of material, unlike rifting where it only involved the stretching of the crust. Convection currents in the sub-lithospheric mantle are the driving mechanisms that caused sea floor spreading to occur. New lithosphere is made when hot material beneath ocean ridges is brought to the surface by these cells. As the new lithosphere moved horizontally away from the ridges, the new crust added to the Gulf of Mexico and the Atlantic caused the continents of North America and South America to move apart. Seafloor spreading in the Gulf of Mexico ceased by the beginning of the Cretaceous and spreading shifted to the proto-Caribbean.
https://en.wikipedia.org/wiki?curid=4384917
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Adult or general genetics clinics serve patients who are diagnosed with genetic conditions that begin to show signs or symptoms in adulthood. Many genetic conditions have varying ages of onset, ranging from an infantile form to an adult form. Genetic counseling can facilitate the decision-making process by providing the patient/family with education about the genetic condition as well as the medical management options available to individuals at risk of developing the condition. Having the genetic information of other members of the family opens the door to asking important questions about the pattern of inheritance of specific disease‐causing mutations. Whilst there is a wealth of literature that describes how families communicate information surrounding single genes, there is very little which explores the experience of communication about family genomes. Adult-onset disorders may overlap multiple specialties.
https://en.wikipedia.org/wiki?curid=251487
1,002,553
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Their global reconstruction was a major breakthrough in evaluation of past climate dynamics, and the first eigenvector-based climate field reconstruction (CFR) incorporating multiple climate proxy data sets of different types and lengths into a high-resolution global reconstruction. To relate this data to measured temperatures, they used principal component analysis (PCA) to find the leading patterns, or principal components, of instrumental temperature records during the calibration period from 1902 to 1980. Their method was based on separate multiple regressions between each proxy record (or summary) and all of the leading principal components of the instrumental record. The least squares simultaneous solution of these multiple regressions used covariance between the proxy records. The results were then used to reconstruct large-scale patterns over time in the spatial field of interest (defined as the empirical orthogonal functions, or EOFs) using both local relationships of the proxies to climate and distant climate teleconnections. Temperature records for almost 50 years prior to 1902 were analysed using PCA for the important step of validation calculations, which showed that the reconstructions were statistically meaningful, or skillful.
https://en.wikipedia.org/wiki?curid=5354105
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In the United States, biomedical research containing human subjects is governed by a baseline standard of ethics known as The Common Rule, which aims to protect a subject's privacy by requiring "identifiers" such as name or address to be removed from collected data. A 2012 report by the Presidential Commission for the Study of Bioethical Issues stated, however, that "what constitutes 'identifiable' and 'de-identified' data is fluid and that evolving technologies and the increasing accessibility of data could allow de-identified data to become re-identified." In fact, research has already shown that it is "possible to discover a study participant's identity by cross-referencing research data about him and his DNA sequence … [with] genetic genealogy and public-records databases." This has led to calls for policy-makers to establish consistent guidelines and best practices for the accessibility and usage of individual genomic data collected by researchers.
https://en.wikipedia.org/wiki?curid=14402695
1,401,277
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In the United States, biomedical research containing human subjects is governed by a baseline standard of ethics known as The Common Rule, which aims to protect a subject's privacy by requiring "identifiers" such as name or address to be removed from collected data. A 2012 report by the Presidential Commission for the Study of Bioethical Issues stated, however, that "what constitutes 'identifiable' and 'de-identified' data is fluid and that evolving technologies and the increasing accessibility of data could allow de-identified data to become re-identified". In fact, research has already shown that it is "possible to discover a study participant's identity by cross-referencing research data about him and his DNA sequence … [with] genetic genealogy and public-records databases". This has led to calls for policy-makers to establish consistent guidelines and best practices for the accessibility and usage of individual genomic data collected by researchers.
https://en.wikipedia.org/wiki?curid=52716809
1,489,745
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In this engine a slab of insulator material, wound with a few strands of heating wire is fixed on the combustion chamber with the wire running on the face exposed to the gases. Fuel injector is situated such that a part of the spray impinges head on this surface. Thus ignition is started. Combustion chamber cylinder head is made narrow so that the combustion spreads quickly to the rest of the space. A part of the fuel burns on the insulator surface and the heat losses from the plate are low, the surface after few minutes of operation reaches a temperature sufficient to start the ignition without the aid of external electric supply. The power consumption of the coil is around 52 W at 6 volts. The engine lends itself easily to the use of wide variety of fuels, including methanol, ethanol and gasoline. The engine runs without any interruption on methanol with a performance comparable to diesel operation. The engine works efficiently at lower speeds than at higher speeds.
https://en.wikipedia.org/wiki?curid=52337910
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As of 2021, it is not known why coccolithophores calcify and how their ability to produce coccoliths is associated with their ecological success. The most plausible benefit of having a coccosphere seems to be a protection against predators or viruses. Viral infection is an important cause of phytoplankton death in the oceans, and it has recently been shown that calcification can influence the interaction between a coccolithophore and its virus. The major predators of marine phytoplankton are microzooplankton like ciliates and dinoflagellates. These are estimated to consume about two-thirds of the primary production in the ocean and microzooplankton can exert a strong grazing pressure on coccolithophore populations. Although calcification does not prevent predation, it has been argued that the coccosphere reduces the grazing efficiency by making it more difficult for the predator to utilise the organic content of coccolithophores. Heterotrophic protists are able to selectively choose prey on the basis of its size or shape and through chemical signals and may thus favor other prey that is available and not protected by coccoliths.
https://en.wikipedia.org/wiki?curid=382890
1,146,525
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As of 2021, it is not known why coccolithophores calcify and how their ability to produce coccoliths is associated with their ecological success. The most plausible benefit of having a coccosphere seems to be a protection against predators or viruses. Viral infection is an important cause of phytoplankton death in the oceans, and it has recently been shown that calcification can influence the interaction between a coccolithophore and its virus. The major predators of marine phytoplankton are microzooplankton like ciliates and dinoflagellates. These are estimated to consume about two-thirds of the primary production in the ocean and microzooplankton can exert a strong grazing pressure on coccolithophore populations. Although calcification does not prevent predation, it has been argued that the coccosphere reduces the grazing efficiency by making it more difficult for the predator to utilise the organic content of coccolithophores. Heterotrophic protists are able to selectively choose prey on the basis of its size or shape and through chemical signals and may thus favor other prey that is available and not protected by coccoliths.
https://en.wikipedia.org/wiki?curid=47520
732,306
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In response to the oral administration of the inflammation-inducer dextran sodium sulfate, Blt2 receptor knockout mice, compared to wild type or Blt1 receptor knockout mice, exhibited: a) more severe colitis inflammation and body weight loss; b) increased mRNA expression for the pro-inflammatory cytokines interferon-γ, IL1B, and Interleukin 6, two pro-inflammatory chemokines viz., chemokine ligand 9 (also termed chemokine ligand 10) and chemokine 19 (CCL19), and metalloproteinases-3, -10, and -13 in inflamed colon tissues; c) enhanced accumulation of interferon-producing macrophages in affected colon tissues; d) increased phosphorylation of signal transducer and activator of transcription 3 (i.e. STAT3) in the crypts of affected colon tissue; and e) reduced colon mucosa integrity and barrier function as deduced from the effects of in vitro studies on the impact of BLT2 receptor expression on leakage of FITC-dextran in Madin-Darby canine kidney II cells. These results suggest that Blt2 receptors normally function to suppress colon inflammation in mice; based on its mass content in affected colon tissues, 12-HHT appears at least partly responsible for maintaining this function by stimulating Blt2 receptors. A similar role for the 12-HHT-BLT2 axis could occur in humans and be relevant to diseases such as ulcerative colitis and Crohn's disease.
https://en.wikipedia.org/wiki?curid=14439956
1,877,127
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In mid-January 2019, the Wilson system completed its 800-mile journey and arrived in Hilo Bay, Hawaii. The Ocean Cleanup planned to return the repaired system to duty by summer. In mid-June, after four months of root cause analyses and redesign, a new revamped testing system (001/B) was deployed. In August, the team announced that after trying multiple alternatives, a water-borne parachute attached to slow the system, and expanding the cork line used to hold the screen in place would be tested. In October they announced that the new system successfully captured and collected plastic, and even microplastics. The model was also more efficient and smaller, making offshore adjustments possible.
https://en.wikipedia.org/wiki?curid=48396387
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This transmembrane protein is responsible for the influx of zinc, manganese, iron, and cadmium. ZIP8 is distributed among the embryo, placenta, and yolk sac during development. Within the embryo, the concentration of ZIP8 is highest during the developmental period of different organ systems, specifically the heart where is it localized in the endothelial cells. Cardiac development is a zinc-dependent event. Beginning around mouse E8.0, the heart is in a tubular form with an outer myocardium layer and an inner endocardium layer, separated by cardiac jelly. As development continues, trabeculation, the protrusion of cardiomyocytes into the cardiac jelly, begins and facilitates nutrient and oxygen exchange prior to the establishment of coronary vessels. Simultaneous with coronary circulation development, the trabeculae then collapse into the ventricular wall in a process known as compaction. Cardiomyocyte differentiation, proliferation, and trabeculae patterning is regulated through Notch 1 signaling, which is upregulated by the ECM. ADAMTS 1, 5, 7, 15, and 19 are zinc metalloenzymes responsible for degrading the ECM prior to compaction. Many studies have analyzed the effects of Slc39a8-/- on fetal heart development and have shown a decrease in zinc influx leading to an increase in cardiomyocyte proliferation through BMP10, hypertrabeculation through the upregulation of Notch1, and ventricular non-compaction due to the persistence of the ECM.
https://en.wikipedia.org/wiki?curid=60504740
1,863,075
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One aspect of the Lippmann concept that was ignored at that time relates to spectroscopic applications. Early in 1933, Herbert E. Ives proposed to use a photoelectric device to probe stationary waves to make spectrometric measurements. In 1995, P. Connes proposed to use the emerging new technology of detectors for three-dimensional Lippmann-based spectrometry. Following this, a first realization of a very compact spectrometer based on a microoptoelectromechanical system (MOEMS) was reported by Knipp et al. in 2005, but it had a very limited spectral resolution. In 2004, two French researchers, Etienne Le Coarer from Joseph Fourier University and Pierre Benech from INP Grenoble, coupled sensing elements to the evanescent part of standing waves within a single-mode waveguide. In 2007, those two researchers reported a near-field method to probe the interferogram within a waveguide. The first SWIFTS-based spectrometers appeared in 2011 based on a SWIFTS linear configuration.
https://en.wikipedia.org/wiki?curid=41527719
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Manipulation of certification regulations as a way to mislead or outright dupe the public is a very real concern. Some examples are creating exceptions (allowing non-organic inputs to be used without loss of certification status) and creative interpretation of standards to meet the letter, but not the intention, of particular rules. For example, a complaint filed with the USDA in February 2004 against Bayliss Ranch, a food ingredient producer and its certifying agent, charged that tap water had been certified organic, and advertised for use in a variety of water-based body care and food products, in order to label them "organic" under US law. Steam-distilled plant extracts, consisting mainly of tap water introduced during the distilling process, were certified organic, and promoted as an organic base that could then be used in a claim of organic content. The case was dismissed by the USDA, as the products had been actually used only in personal care products, over which the department at the time extended no labeling control. The company subsequently adjusted its marketing by removing reference to use of the extracts in food products.
https://en.wikipedia.org/wiki?curid=412765
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Another characteristic feature of asthma is periodic disease exacerbations. Holgate and his research group led by Sebastian Johnston first demonstrated the causal link between exacerbations in the autumn and winter months and respiratory virus infections. This led to the subsequent discovery that epithelial cells from those with moderate-severe asthma were deficient in their ability to generate an innate interferon beta response when infected by human rhinoviruses. This discovery was patented and in 2003 Holgate, Donna Davies and founded the University spin-off company Synairgen to explore the potential therapeutic benefits of inhaled interferon beta in attenuating virus-induced exacerbations of asthma and COPD. Linked to clinical trials showing antiviral protection in asthma and COPD and the knowledge that SARS CoV-2 has developed mechanisms to evade the innate immune response mechanisms in the lung and that patients with more severe COVID-19 are themselves deficient in being able to mount an interferon beta response, Synairgen has completed a successful Phase II placebo-controlled trial in COVID-19 and is proceeding to undertake larger international trials as a novel treatment for this disease.
https://en.wikipedia.org/wiki?curid=55597956
1,808,216
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Much of 2-meter FM operation uses a radio repeater, a radio receiver and transmitter that instantly retransmits a received signal on a separate frequency. Repeaters are normally located in high locations such as a tall building or a hill top overlooking expanses of territory. On VHF frequencies such as 2-meters, antenna height greatly influences how far one can talk. Typical reliable repeater range is about . Some repeaters in unusually high locations, such as skyscrapers or mountain tops, can be usable as far out as . Reliable range is very dependent on the height of the repeater antenna and also on the height and surroundings of the handheld or mobile unit attempting to access to the repeater. Line of sight would be the ultimate in reliability. The typical hand held two meter FM transceiver produces about 5 watts of transmit power. Stations in a car or home might provide higher power, 25 to 75 watts, and may use a simple vertical antenna mounted on a pole or on the rooftop of a house or a vehicle.
https://en.wikipedia.org/wiki?curid=804159
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BCD is very common in electronic systems where a numeric value is to be displayed, especially in systems consisting solely of digital logic, and not containing a microprocessor. By employing BCD, the manipulation of numerical data for display can be greatly simplified by treating each digit as a separate single sub-circuit. This matches much more closely the physical reality of display hardware—a designer might choose to use a series of separate identical seven-segment displays to build a metering circuit, for example. If the numeric quantity were stored and manipulated as pure binary, interfacing with such a display would require complex circuitry. Therefore, in cases where the calculations are relatively simple, working throughout with BCD can lead to an overall simpler system than converting to and from binary. Most pocket calculators do all their calculations in BCD.
https://en.wikipedia.org/wiki?curid=3821
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Uzbekistan and the other four Central Asian republics belong to several international bodies, including the Organization for Security and Co-operation in Europe, the Economic Cooperation Organization and the Shanghai Cooperation Organisation. They are also members of the Central Asia Regional Economic Cooperation (CAREC) Programme, which also includes Afghanistan, Azerbaijan, China, Mongolia and Pakistan. In November 2011, the 10 member countries adopted the "CAREC 2020 Strategy", a blueprint for furthering regional co-operation. Over the decade to 2020, US$50 billion is being invested in priority projects in transport, trade and energy to improve members’ competitiveness. The landlocked Central Asian republics are conscious of the need to co-operate in order to maintain and develop their transport networks and energy, communication and irrigation systems. Only Kazakhstan and Turkmenistan border the Caspian Sea and none of the republics has direct access to an ocean, complicating the transportation of hydrocarbons, in particular, to world markets.
https://en.wikipedia.org/wiki?curid=54205035
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The Excellence Center for Novel Materials (, CENM) is part of a high-priority national effort, supported primarily by COLCIENCIAS and implemented by 19 recognized multidisciplinary research groups in 10 universities across the nation. Additionally, it gets international support from four world-renowned institutions: The Nanotechnology center from Northwestern University, the Thin Film and Nanoscience Group from the University of California at San Diego, the Department of Civil and Environmental Engineering from the University of Michigan, and the Center for Advanced Interdisciplinary Research on Materials from the University of Chile. Research work at CENM is organized around 4 Interdisciplinary Research Themes (IRT), which are: Advanced Coatings, Composite Materials, Nano-magnetism, and Solid State Devices, Sensors, and Mesoscopic Systems. The center acquired in 2008 an Atomic force microscope, the first in South America, with a cost of $ COP.
https://en.wikipedia.org/wiki?curid=14257781
1,325,264
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In 1893, Gage and John Henry Comstock founded the Comstock Publishing Company in order to make textbooks on microscopy, histology, and entomology available at a reasonable price to students and to publish the works of Anna Botsford Comstock on nature study. In 1931, Gage gave the company to Cornell University as a gift. Gage, along with Luzerne Corville and the architect, William H. Miller, designed Stimson Hall, which housed the Cornell Medical College. In 1915, Gage and his son started a memorial fund for Susanna Phelps Gage that was used to build a room in Clara Dickson Hall, the new dormitory for women. In 1918, they endowed the Susanna Phelps Gage Endowment for research in physics. Gage served as the faculty representative to the Cornell University Board of Trustees from 1921 to 1922. Gage was instrumental in starting the Flower Library in the Veterinary College of Cornell University in 1897. Gage served as the "responsible librarian" of the Van Cleef Memorial Library of medicine in Stimson Hall from 1922 to 1944. Upon his death in 1944, Gage donated his brain to the Wilder Brain Collection at Cornell University where it can still be seen on the second floor of Uris Hall. Gage's personal book collection and papers can be found in the Rare and Manuscript Collections of the Cornell University Library.
https://en.wikipedia.org/wiki?curid=36207117
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Since carbon dioxide and oxygen compete at the active site of RuBisCO, carbon fixation by RuBisCO can be enhanced by increasing the carbon dioxide level in the compartment containing RuBisCO (chloroplast stroma). Several times during the evolution of plants, mechanisms have evolved for increasing the level of carbon dioxide in the stroma (see carbon fixation). The use of oxygen as a substrate appears to be a puzzling process, since it seems to throw away captured energy. However, it may be a mechanism for preventing carbohydrate overload during periods of high light flux. This weakness in the enzyme is the cause of photorespiration, such that healthy leaves in bright light may have zero net carbon fixation when the ratio of O to available to RuBisCO shifts too far towards oxygen. This phenomenon is primarily temperature-dependent: High temperatures can decrease the concentration of dissolved in the moisture of leaf tissues. This phenomenon is also related to water stress: Since plant leaves are evaporatively cooled, limited water causes high leaf temperatures. plants use the enzyme PEP carboxylase initially, which has a higher affinity for . The process first makes a 4-carbon intermediate compound, which is shuttled into a site of photosynthesis then de-carboxylated, releasing to boost the concentration of , hence the name plants.
https://en.wikipedia.org/wiki?curid=318370
766,315
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The men's sabre was one of eight fencing events on the fencing at the 1976 Summer Olympics programme. It was the eighteenth appearance of the event. The competition was held from July 21 to 22, 1976. 46 fencers from 18 nations competed. Nations had been limited to three fencers each since 1928. The event was won by Viktor Krovopuskov of the Soviet Union, the nation's second consecutive victory in the men's sabre. The Soviet Union's two gold medals in the event moved it out of a six-way tie into sole possession of second place all-time, after Hungary with 11. The Soviet team swept the men's sabre medals in 1976, with Vladimir Nazlymov taking silver and Viktor Sidyak bronze. It was the third sweep in the event (Hungary accomplished it in 1912 and 1952). Nazlymov and Sidyak were the eighth and ninth men to win multiple medals in the event. Excluding matches against each other, the three Soviets went 48–3 during the tournament. For the first time since 1900, Hungary competed in the men's sabre but did not win a medal (did not compete in 1904 or 1920, medaled in 1908, 1912, and for eleven straight Games from 1924 to 1972).
https://en.wikipedia.org/wiki?curid=31362325
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Following the strengthening period, the university started to focus on ensuring its internal stability. From the early 2000s, structures were added and expanded. The Central Library, the Center for Technical Assistance to Small and Medium-sized Industries, the KAU Aerospace Center/Museum, and the New Administrative Building were built. The Library and the Student's Hall had a level extension. The microsatellite CubeSat was developed and launched for the first time among Korean universities in 2006. Major research results have been observed in the realm of an unmanned aerial vehicle (UAV) since the first autonomous formation flight of UAV and the first flight of solar-powered UAV for 12 consecutive hours in Korea.
https://en.wikipedia.org/wiki?curid=20303829
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A study has been done on a 37-year-old male who had unilateral spastic cerebral palsy (USCP). USCP, being the common subtype results with movement impairments on one side of the body. There are a few therapies for this type of rehabilitation. The study participant was diagnosed with USCP at 18 months due to a car accident. Along with robotic therapy, they also used tDCS. They applied them over the motor map of the affected hand. For each therapy session, the participant received 20 min of anodal tDCS. The excitatory sponge was placed over the location of motor map of the damaged hand. The anodal sponge was then place on the contralateral forehead. Both of these sponges were moistened with saline and held in place with a headband. By the end of the study it was confirmed that combined tDCS and robotic upper limb therapy safely improves upper limb function. - This study was adopted from their work with stroke rehab, that being said it is not known if the duration and dose of therapy is actually ideal for people with USCP. For this study in particular, it is stated that the participant confirmed that he reached the max accuracy with the robots by the midpoint of the study. However, it is not known if the effects of therapy would have been persistent had the training been shorter. That being said more work and research has yet to be done to identify “stop signals”, which indicate that participant has reached their improvement goal.
https://en.wikipedia.org/wiki?curid=37568453
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Mesoscale convective systems are thunderstorm regions which may be round or linear in shape, on the order of or more across in one direction but smaller than extratropical cyclones, and include systems such as tropical cyclones, squall lines, and mesoscale convective complexes (MCCs), among others. MCS is a more generalized term which includes systems that do not satisfy the stricter size, shape, or duration criteria of an MCC. They tend to form near weather fronts and move into areas of 1000-500 mb thickness diffluence, which are areas where the low to mid level temperature gradient broadens, which generally steers the thunderstorm clusters into the warm sector of extratropical cyclones, or equatorward of warm fronts. They can also form along any convergent zones within the tropics. A recent study found that they tend to form when the surface temperature varies with more than 5 degrees between day and night. Their formation has been noted worldwide, from the Meiyu front in the far East to the deep tropics. Mesoscale convective systems are important to the United States rainfall climatology over the Great Plains since they bring the region about half of their annual warm season rainfall.
https://en.wikipedia.org/wiki?curid=2347959
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Hematocrit levels also serve as an indicator of health conditions. Thus, tests on hematocrit levels are often carried out in the process of diagnosis of such conditions, and may be conducted prior to surgery. Additionally, the health conditions associated with certain hematocrit levels are the same as ones associated with certain hemoglobin levels. As blood flows from the arterioles into the capillaries, a change in pressure occurs. In order to maintain pressure, the capillaries branch off to a web of vessels that carry blood into the venules. Through this process blood undergoes micro-circulation. In micro-circulation, the Fåhræus effect will take place, resulting in a large change in hematocrit. As blood flows through the arterioles, red cells will act a feed hematocrit (Hf), while in the capillaries, a tube hematocrit (Ht) occurs. In tube hematocrit, plasma fills most of the vessel while the red cells travel through in somewhat of a single file line. From this stage, blood will enter the venules increasing in hematocrit, in other words the discharge hematocrit (Hd).In large vessels with low hematocrit, viscosity dramatically drops and red cells take in a lot of energy. While in smaller vessels at the micro-circulation scale, viscosity is very high. With the increase in shear stress at the wall, a lot of energy is used to move cells.
https://en.wikipedia.org/wiki?curid=436059
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As office computers became commonplace in the 1980s, telex switched to a new telegraph code, ASCII, which aided integration with computers. ASCII is a 7-bit code, compared to the Baudot 5-bit code, which means it has enough codes to represent both upper and lower case whereas Baudot machines printed in upper case only. Teleprinters could then be used in conjunction with word processor programs for instance. Increased use of fax machines on telephone lines drove down telex traffic, a change that was precipitated by the postal strikes of 1971, and most especially those of 1988. Email and the internet mostly superseded Telex in the 1990s. The number of subscribers in the UK fell from 115,000 in 1988 to 18,000 in 1997. One of the last groups using the telex service was solicitors, who used it for exchange of contracts in conveyancing amongst other things. Conveyancing can be done by post or telephone, but telex has an immediacy that the former does not and provides a written record that the latter does not. Conveyancing can also be done over the internet, but in the 1990s there was some concern over its security.
https://en.wikipedia.org/wiki?curid=60245762
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To obtain the most accurate results possible it is necessary to calibrate the internal temperature sensors of the thermal manikin. A good calibration will use at least 2 temperature set points minimum 10 °C apart from one another. The manikin is set up in a thermally controlled environmental chamber so that the temperature of all its segments will be nearly identical to the operative temperature of the chamber. This means that the manikin must be unclothed and with minimal insulation between any body part and the air. A good system to achieve this is to have the manikin seated in an open chair (allowing air movement to pass through), with its feet propped up off the ground. Fans should be used to increase air movement in the chamber, ensuring constant mixing. This is acceptable for maintaining a constant temperature as there is no evaporative cooling without sweating or condensation (humidity should be low to ensure no condensation occurs). At each temperature set point the manikin will need to remain in the room for 3 to 6 hours in order to come to steady state conditions. Once equilibrium has been obtained a calibration point may be obtained for each body segment (this should be included in the control software).
https://en.wikipedia.org/wiki?curid=41138699
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As an isotope of hydrogen, tritium (T) frequently binds to oxygen and forms TO. This molecule is chemically identical to HO and so is both colorless and odorless, however the additional neutrons in the hydrogen nuclei cause the tritium to undergo beta decay with a half-life of 12.3 years. Despite being measurable, the tritium released by nuclear power plants is minimal. The United States NRC estimates that a person drinking water for one year out of a well contaminated by what they would consider to be a significant tritiated water spill would receive a radiation dose of 0.3 millirem. For comparison, this is an order of magnitude less than the 4 millirem a person receives on a round trip flight from Washington, D.C. to Los Angeles, a consequence of less atmospheric protection against highly energetic cosmic rays at high altitudes.
https://en.wikipedia.org/wiki?curid=22151
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Eggan's research goals at Harvard were to understand how nuclear transplantation works, and to make stem cells that carry genes for specific diseases such as Parkinson's disease, amyotrophic lateral sclerosis (Lou Gehrig's disease), and Alzheimer's. In 2006, following "more than two years of intensive ethical and scientific review", two groups of scientists at HSCI were granted permission to explore Somatic Cell Nuclear Transfer techniques to create disease-specific stem cell lines as an approach to various currently incurable conditions. Eggan was in charge of one of these two groups and senior author of their results; a renowned co-director of HSCI ran the other. The groups initially collaborated in researching diabetes before Eggan's group switched to work on neurodegenerative diseases. Harvard President Lawrence Summers called the approvals "a seminal event".
https://en.wikipedia.org/wiki?curid=13041409
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Effects of EAHPs (exhaust air heat pumps) have also been studied within the aforementioned regions displaying promising results. An exhaust air heat pump uses electricity to extract heat from exhaust air leaving a building, redirecting it towards DHW (domestic hot water), space heating, and warming supply air. In colder countries, an EAHP may be able to recover around 2 - 3 times more energy than an air-to-air exchange system. A 2022 study surrounding projected emission decreases within Sweden’s Kymenlaakso region explored the aspect of retrofitting existing apartment buildings (of varying ages) with EAHP systems. Select buildings were chosen in the cities of Kotka and Kouvola, their projected carbon emissions decreasing by about 590 tCO2 and 944 tCO2 respectively with a 7 - 13 year payoff period. It is, however, important to note that EAHP systems may not produce favourable results if installed in a building exhibiting incompatible exhaust output rates or electricity consumption. In this case, EAHP systems may increase energy bills without providing reasonable cuts to carbon emissions (see EAHP).
https://en.wikipedia.org/wiki?curid=2704720
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For J-10B, the nose cone is modified to accommodate an active phased array airborne radar (AESA) radar. The general designer of AESA for J-10B is Mr. Zhang Kunhui (张昆辉, 1963 -), the head of 607 Research Institute in Neijiang, Sichuan. Mr. Zhang Kunhui became the deputy head of 607th Research Institute in 1997, and four years later in 2001, he became the head of the institute, when the AESA program for J-10B started. The primary contractor of this AESA is the Radar and Electronic Equipment Research Academy of Aviation Industry Corporation of China located in Sichuan, formed in March 2004 by combining the 607th Research Institute and 171st Factory together with Mr. Zhang Kunhui was named as the head of the research academy. According to Chinese governmental media, the AESA for J-10B took 8 years to develop, finally completed in 2008, and Chinese fighter radars hence achieved a quantum leap in that it went from mechanically scanned planar slotted array directly into AESA, skipping the passive phased array PESA radar. Many suspected the radar is a PESA, but during its brief debuts in the 7th China International Defense Electronics Exhibition (CIDEX) in May 2010 and the 6th International Conference on Radar held in Beijing in Sept 2011, Chinese official sources have claimed it is an AESA.
https://en.wikipedia.org/wiki?curid=1300422
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Especially powerful greenhouse gases, such as sulfur hexafluoride, chlorofluorocarbons (CFCs), or perfluorocarbons (PFCs), have been suggested both as a means of initially warming Mars and of maintaining long-term climate stability. These gases are proposed for introduction because they generate a greenhouse effect thousands of times stronger than that of . Fluorine-based compounds such as sulphur hexafluoride and perfluorocarbons are preferable to chlorine-based ones as the latter destroys ozone. It has been estimated that approximately 0.3 microbars of CFCs would need to be introduced into Mars' atmosphere in order to sublimate the south polar glaciers. This is equivalent to a mass of approximately 39 million tonnes, that is, about three times the amount of CFCs manufactured on Earth from 1972 to 1992 (when CFC production was banned by international treaty). Maintaining the temperature would require continual production of such compounds as they are destroyed due to photolysis. It has been estimated that introducing 170 kilotons of optimal greenhouse compounds (CFCFCF, CFSCFCF, SF, SFCF, SF(CF)) annually would be sufficient to maintain a 70-K greenhouse effect given a terraformed atmosphere with earth-like pressure and composition.
https://en.wikipedia.org/wiki?curid=4923933
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Along with the magazine a student research organisation, PoWER (Promotion of Work Experience and Research) has been started. Under it several independent student groups are working on projects like the Lunar Rover for ISRO, alternate energy solutions under the Group for Environment and Energy Engineering, ICT solutions through a group Young Engineers, solution for diabetes, green community solutions through ideas like zero water and zero waste quality air approach. Through BRaIN (Biological Research and Innovation Network) students interested in solving biological problems get involved in research projects like genetically modifying fruit flies to study molecular systems and developing bio-sensors to detect alcohol levels. A budget of Rs 1.5 to 2 crore has been envisaged to support student projects that demonstrate technology.
https://en.wikipedia.org/wiki?curid=14894
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Cytokinins are a class of plant hormones named for their control of cell division (especially cytokinesis). The natural cytokinin zeatin was discovered in corn, "Zea mays", and is a derivative of the purine adenine. Zeatin is produced in roots and transported to shoots in the xylem where it promotes cell division, bud development, and the greening of chloroplasts. The gibberelins, such as gibberelic acid are diterpenes synthesised from acetyl CoA via the mevalonate pathway. They are involved in the promotion of germination and dormancy-breaking in seeds, in regulation of plant height by controlling stem elongation and the control of flowering. Abscisic acid (ABA) occurs in all land plants except liverworts, and is synthesised from carotenoids in the chloroplasts and other plastids. It inhibits cell division, promotes seed maturation, and dormancy, and promotes stomatal closure. It was so named because it was originally thought to control abscission. Ethylene is a gaseous hormone that is produced in all higher plant tissues from methionine. It is now known to be the hormone that stimulates or regulates fruit ripening and abscission, and it, or the synthetic growth regulator ethephon which is rapidly metabolised to produce ethylene, are used on industrial scale to promote ripening of cotton, pineapples and other climacteric crops.
https://en.wikipedia.org/wiki?curid=4183
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Another 1986 release was Falcom's "Xanadu Scenario II", an early example of an expansion pack. The game was non-linear, allowing the eleven levels to be explored in any order. "" simplified the RPG mechanics of "Xanadu", such as removing the character customization and simplifying the numerical statistics into icons, and emphasized faster-paced platform action, with a strict 30-minute time limit. The action took place entirely in a side-scrolling view rather than switching to a separate overhead combat screen like its predecessor. These changes "Romancia" more like a side-scrolling action-adventure game. Square's 1986 release, "Cruise Chaser Blassty", was a sci-fi RPG that had the player control a customizable mecha robot from a first-person view. That same year also saw the arcade release of the sequel to "The Tower of Druaga", "The Return of Ishtar", an early action RPG to feature two-player cooperative gameplay, dual-stick control in single player, a female protagonist, the first heroic couple in gaming, and the first password save system in an arcade game.
https://en.wikipedia.org/wiki?curid=32408675
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Similar to most positive (+) ssRNA viruses, flaviviruses generate organelle-like structures in the endoplasmic reticulum (ER) of the host organism for replication. Since the ER is involved "in de novo" biogenesis of some cell organelles, viruses take advantage of the replication location to take over some of the organelle functions for its own replication cycle. Viral genome replication in the ER occurs in structures called virus replication organelles. The organelles include two distinct subdomains, vesicle packets (VP) and convoluted membranes (CMs). The site of viral genome replication is found within the vesicle packets which are clusters of small vesicle compartments. The function of CMs is relatively unknown, but they are described as electron-dense amorphous structures near the VPs. The large single polypeptide encoded by the genome is processed in the ER membrane by host or viral proteases. The large polypeptide is divided into three structural proteins (capsid, prM, and E) and a group of non-structural proteins (NS1-NS5). The viral genomic RNA forms a nucleocapsid complex with the capsid protein which aids in genome packaging into mature virus particles. The prM and E proteins are considered significant components of the virus particle and can even form spherical virus particles. The exact functions of NS proteins are relatively unknown, however, they are assumed to play a role in the formation of virus particle replication organelles. The NS1 protein has a large ectodomain which is believed to function in the deformation of the ER membrane from the luminal side. NS2B protein, a transmembrane protein, directly interacts with NS3 which is a soluble protein anchored to the membrane. With its protease activity and RNA helicase activity, the NS3 protein is involved in viral polyprotein processing and viral RNA replication. NS5 plays a role in the replication of the viral genomic RNA and the formation of the 5’-cap structure for protein translation with its RNA dependent and RNA polymerase (RdRp) activity and methyltransferase activity. The 5′-end possesses a type I cap (m7GpppAmp) that is not seen in viruses of the other genera. Proteins N2SA, NS4A, and NS4B are membrane-integrated proteins but have no clear function.
https://en.wikipedia.org/wiki?curid=62579271
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Wozniak's open-architecture design and Apple II's multiple expansion slots permitted a wide variety of third-party devices, including peripheral cards, such as serial controllers, display controllers, memory boards, hard disks, networking components, and real-time clocks. There were plug-in expansion cards—such as the Z-80 SoftCard—that permitted Apple II to use the Z80 processor and run programs for the CP/M operating system, including the dBase II database and the WordStar word processor. The Z80 card also allowed the connection to a modem, and thereby to any networks that a user might have access to. In the early days, such networks were scarce. But they expanded significantly with the development of bulletin board systems in later years. There was also a third-party 6809 card that allowed OS-9 Level One to be run. Third-party sound cards greatly improved audio capabilities, allowing simple music synthesis and text-to-speech functions. Apple II accelerator cards doubled or quadrupled the computer's speed.
https://en.wikipedia.org/wiki?curid=2275
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Intervertebral disc volume changes were quantified by magnetic resonance imaging in response to varying scenarios of axial unloading. The cross-sectional areas and the transverse proton relaxation constants (T2) of IVDs were indices used to monitor adaptive changes of the intervertebral discs to overnight bed rest (over 5 weeks and 17 weeks) and after 8 days of spaceflight. The averaged expansion of IVDs with bed rest appeared to reach an equilibrium anywhere between 9 hours and 4 days of unloading with the expansion ranging between 10-40% of baseline, pre-bed rest values (mean = 22%). There were mild increases in T2 relaxation times relative to increases in disc area. Restoration of IVD volumes after unloading was not evaluated systematically but Table 1 provides a relative comparison of the elapsed time in 1 G at which time the measured IVD volumes were no different from baseline measurements; the relative periods of recovery appear to lengthen as the period of IVD adaptation to unloading increases.
https://en.wikipedia.org/wiki?curid=37228900
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Cervical cancer is caused by human papilloma virus (HPV) expressing E6 and E7 oncoproteins, which inactivate the tumor suppressor protein p53 and pRb respectively. Withaferin A was found to down regulate expression of E6 and E7 oncoproteins, induce accumulation of p53, causes G2/M cell cycle arrest, alters the expression levels of apoptotic markers Bcl2, Bax and caspase3. In athymic mice model, withaferin reduced 70% of the tumor volume. Therefore, withaferin A can be a potential therapeutic agent for the treatment of cervical cancer without major side effects. Withaferin A has been shown to enhance radiation-induced apoptosis in certain cell lines. However, its mechanism of action on cell death is not well understood. It has been suggested that sensitization of cancer cells to radiation is due to the inhibition of NF-κB. It exhibits anti-tumor as well as anti-inflammatory activities. It can act as an immuno-suppressant by inhibiting NF-κB activation. In animal models, it prevented skin cancer induced by ultraviolet radiation. The antioxidant property of withaferin aid in the prevention of DNA damage by mutagens; in combination with detoxifying, anti-inflammatory and immunomodulatory effects, it can contribute to the chemopreventive action.
https://en.wikipedia.org/wiki?curid=33219149
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In the era of expensive memory this was a real concern, notably because memory was also much slower than the CPU. Since a RISC design's codice_1 would actually require four instructions (two loads, an add, and a save), the machine would have to do much more memory access to read the extra instructions, potentially slowing it down considerably. This was offset to some degree by the fact that the new designs used what was then a very large instruction word of 32-bits, allowing small constants to be folded directly into the instruction instead of having to be loaded separately. Additionally, the results of one operation are often used soon after by another, so by skipping the write to memory and storing the result in a register, the program did not end up much larger, and could in theory run much faster. For instance, a string of instructions carrying out a series of mathematical operations might require only a few loads from memory, while the majority of the numbers being used would be either constants in the instructions, or intermediate values left in the registers from prior calculations. In a sense, in this technique some registers are used to "shadow" memory locations, so that the registers are used as proxies for the memory locations until their final values after a group of instructions have been determined.
https://en.wikipedia.org/wiki?curid=1355137
1,299,974
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The idea of using a high-speed maglev transportation system to link Washington DC and Baltimore dates back to the 1990s. Section 1218 of the "Transportation Equity Act for the 21st Century" created a National Magnetic Levitation Transportation Technology Deployment Program. The program is administered by the Federal Railroad Administration (FRA), a unit of the U.S. Department of Transportation. The objective of the program is to demonstrate high-speed maglev technology in commercial service through a project of about 40 miles in length, so that it can be considered later in the century for implementation in a longer distance intercity corridor application. Section 1218 envisioned $1 billion in federal funding for a single demonstration system which must be matched by other sources 2 to 1. FRA selected seven projects for further study in May 1999, and they received $55 million in further funding to develop their proposals. Of these seven, Baltimore–Washington and Pittsburgh advanced to next stage as semi-finalists in April 2001.
https://en.wikipedia.org/wiki?curid=5786785
1,334,476
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Candidates for the "special material" are polystyrene and a substance called "Fogbank", an unclassified codename. Fogbank's composition is classified, though aerogel has been suggested as a possibility. It was first used in thermonuclear weapons with the W76 thermonuclear warhead, and produced at a plant in the Y-12 Complex at Oak Ridge, Tennessee, for use in the W76. Production of Fogbank lapsed after the W76 production run ended. The W76 Life Extension Program required more Fogbank to be made. This was complicated by the fact that the original Fogbank's properties were not fully documented, so a massive effort was mounted to re-invent the process. An impurity crucial to the properties of the old Fogbank was omitted during the new process. Only close analysis of new and old batches revealed the nature of that impurity. The manufacturing process used acetonitrile as a solvent, which led to at least three evacuations of the Fogbank plant in 2006. Widely used in the petroleum and pharmaceutical industries, acetonitrile is flammable and toxic. Y-12 is the sole producer of Fogbank.
https://en.wikipedia.org/wiki?curid=2269463
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The use of medicines to treat disease in food-producing animals is regulated in nearly all countries, although some countries prescription-control their antibiotics, meaning only qualified veterinary surgeons can prescribe and in some cases dispense them. Historically, the restrictions have existed to prevent contamination of mainly meat, milk, eggs and honey with chemicals that are in any way harmful to humans. Treating a sick animal with medicines may lead the animal product containing some of those medicines when the animal is slaughtered, milked, lays eggs or produces honey, unless withdrawal periods are adhered to which stipulate a period of time to ensure the medicines have left the animal's system sufficiently to avoid any risk. Scientific experiments provide data for each medicine in each application, showing how long it is present in the body of an animal and what the animal's body does to metabolise the medicine. By the use of 'drug withdrawal periods' before slaughter or the use of milk or eggs from treated animals, veterinarians and animal owners ensure that the meat, milk and eggs is safe and free of any contamination. However, some countries have also banned or heavily controlled routine use of antibiotics for growth stimulation or the preventative control of disease arising from deficiencies in management or facilities. This is not over concerns about residues, but about the growth of antibiotic resistance.
https://en.wikipedia.org/wiki?curid=40364158
460,478
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Due to the restructuring of forces at the end of the Cold War, surplus US Army M1A1s were absorbed by the US Marines replacing their M60A1s on a one for one basis, allowing the Marine Corps to quickly become an all-M1 tank force at reduced cost. Except for a small number in TRADOC service for the combat training of units in Europe, most M60s were placed in reserve. Some 1,400 were transferred to NATO allies from 1991 to 1993 under the Treaty on Conventional Armed Forces in Europe and some were sold, mainly to Middle Eastern countries. Tanks were given to a few nations under governmental grants. They were finally declared as excess to US needs in 1994. They were superseded in National Guard service by the M1 version of the Abrams MBT and fully replaced by the M1A1.
https://en.wikipedia.org/wiki?curid=470028
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Sidgwick's "Methods of Ethics" was—and is—important for many reasons. Though earlier utilitarians like William Paley, Jeremy Bentham, and John Stuart Mill had sketched versions of utilitarian ethics, Sidgwick was the first theorist to develop the theory in detail and to investigate how it relates both to other popular ethical theories and to conventional morality. His efforts to show that utilitarianism is substantially compatible with common moral values helped to popularize utilitarian ethics in the late-nineteenth and early-twentieth centuries. The careful, painstaking, and detailed way Sidgwick discusses moral problems was an important influence on G. E. Moore, Bertrand Russell, and other founders of Anglo-American analytic philosophy. Contemporary ethicists Derek Parfit and Peter Singer have acknowledged Sidgwick as a major influence on their thought. As Sidgwick scholar J. B. Schneewind has noted, the "Methods" “is widely viewed as one of the best works of moral philosophy ever written. His account of classical utilitarianism is unsurpassed. His discussions of the general status of morality and of particular moral concepts are models of clarity and acumen. His insights about the relations between egoism and utilitarianism have stimulated much valuable research. And his way of framing moral problems, by asking about the relations between commonsense beliefs and the best available theories, has set much of the agenda for twentieth-century ethics.”
https://en.wikipedia.org/wiki?curid=25688571
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The objectives of the IAMI are to sensitize the Indian medical community to the benefits of Information Technology (IT), bring about awareness and ensure greater utilization of IT in healthcare facilities across the length and breadth of India. The IAMI also aims to bring together the computer professionals and medical professionals and to provide necessary assistance and guidance to other organizations to implement and reap the benefits of IT for a high quality health care. It supports introduction of computer literacy along with medical education, development of computerized clinical records as well as medical digital libraries, access to information and creation of databases and Knowledge Bases for AI applications. IAMI emphasizes organized research and development of medical informatics as an independent discipline. It provides various communication and interaction channels among its members by means of e-groups and through publication of a scholarly journal (IJMI).
https://en.wikipedia.org/wiki?curid=6954804
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This model, a reaction–diffusion model first proposed in 1979, is based on the self-organizing properties of excitable media described by Alan Turing in 1952. The excitable medium is the limb bud mesenchyme, in which cells interact by positively autoregulatory morphogens such as transforming growth factor beta (TGF-β) and inhibitory signaling pathways involving fibroblast growth factor (FGF) and Notch signalling. Proximodistal and craniocaudal axes are not considered to be independently specified, but instead emerge by transitions in the number of parallel elements as the undifferentiated apical zone of the growing limb bud undergoes reshaping. This model only specifies a "bare bones" pattern. Other factors like sonic hedgehog (Shh) and Hox proteins, primary informational molecules in the other models, are proposed instead to play a fine-tuning role.
https://en.wikipedia.org/wiki?curid=8134498
1,293,959
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However, it seems that the results of the raid were a lot more effective than the press had led people to believe. All of the bombs were dropped into the correct target box, except for one string of bombs which had missed the area completely because of a radar failure. After about a week, US Army teams began to enter the area and reported almost total destruction of all life in the area. Additional missions were cancelled and did not resume until July. There was initially some skepticism about the usefulness of a high-altitude radar bomb drop against guerrilla forces. Nevertheless, within a few months there was universal acceptance of the power of the B-52 raids as a new type of artillery. By November 1965, the B-52s were able to support the 1st Air Cavalry Division in mopping up operations near Pleiku.
https://en.wikipedia.org/wiki?curid=15948763
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The first assault was made on 17 January. Near the coast, the British X Corps (56th and 5th Divisions) forced a crossing of the Garigliano (followed some two days later by the British 46th Division on their right) causing General Fridolin von Senger und Etterlin, commander of the German XIV Panzer Corps, and responsible for the Gustav defences on the south western half of the line, some serious concern as to the ability of the German 94th Infantry Division to hold the line. Responding to Senger's concerns, Kesselring ordered the 29th and 90th Panzergrenadier Divisions from the Rome area to provide reinforcement. There is some speculation as to what might have been if X Corps had had the reserves available to exploit their success and make a decisive breakthrough. The corps did not have the extra men, but there would certainly have been time to alter the overall battle plan and cancel or modify the central attack by the U.S. II Corps to make men available to force the issue in the south before the German reinforcements were able to get into position. As it happened, Fifth Army HQ failed to appreciate the frailty of the German position and the plan was unchanged. The two divisions from Rome arrived by 21 January and stabilized the German position in the south. In one respect, however, the plan was working in that Kesselring's reserves had been drawn south. The three divisions of Lieutenant General McCreery's X Corps sustained some 4,000 casualties during the period of the first battle.
https://en.wikipedia.org/wiki?curid=33088
353,934
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The majority of ERVs that occur in vertebrate genomes are ancient, inactivated by mutation, and have reached genetic fixation in their host species. For these reasons, they are extremely unlikely to have negative effects on their hosts except under unusual circumstances. Nevertheless, it is clear from studies in birds and non-human mammal species including mice, cats and koalas, that younger (i.e., more recently integrated) ERVs can be associated with disease. The number of active ERVs in the genome of mammals is negatively related to their body size suggesting a contribution to the Peto's paradox through cancer pathogenesis. This has led researchers to propose a role for ERVs in several forms of human cancer and autoimmune disease, although conclusive evidence is lacking.
https://en.wikipedia.org/wiki?curid=2311903
709,523
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John Crawford (3 May 1746 – 9 May 1813), an introducer of vaccination into America and investigator into the cause of disease, was born in the north of Ireland May 3, 1746. He was the second of four sons of a Protestant clergyman, all of whom became professional men, his brother Adair being physician to St. Thomas' Hospital, London, and professor of chemistry at Woolwich. At seventeen he entered Trinity College Dublin, and afterwards went to the Leyden University, where he graduated M. D. He then made two voyages to the East Indies as surgeon in the East India Company's service. About 1778 he was married and shortly after received an appointment as surgeon to the Naval Hospital on the Island of Barbadoes, a position of great responsibility. In 1780 a terrible hurricane devastated the island, where upon he furnished aid and medicines to the afflicted inhabitants without stint and without compensation. In 1781 he returned to England on account of bad health and during the voyage lost his wife. In 1790 he received from the Dutch government the appointment of surgeon-major to the colony of Demerara in South America; there he had charge of a military hospital of sixty to eighty beds.
https://en.wikipedia.org/wiki?curid=58030865
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Coral is a calcifying organism, putting it at high risk for decay and slow growth rates as ocean acidification increases. Aragonite assists the coral as they build their skeletons because it is another form of calcium carbonate (CaCO) that is more soluble. When the pH of the water decreases, aragonite decreases as well, leading to the loss of calcium carbonate uptake in corals. Levels of aragonite have decreased by 16% since industrialization and could be lower in some portions of the Great Barrier Reef due to the current, which allows northern corals to take up more aragonite than southern corals. Aragonite is predicted to reduce by 0.1 by 2100 which could greatly hinder coral growth. Since 1990, calcification rates of "Porites", a common large reef-building coral in the Great Barrier Reef, have decreased by 14.2% annually. Aragonite levels across the Great Barrier Reef itself are not equal; due to currents and circulation, some portions of the Great Barrier Reef can have half as much aragonite as others. Levels of aragonite are also affected by calcification and production, which can vary from reef to reef. If atmospheric carbon dioxide reaches 560 ppm, most ocean surface waters will be adversely undersaturated with respect to aragonite and the pH will have reduced by about 0.24 units – from almost 8.2 today to just over 7.9. At this point (sometime in the third quarter of this century at current rates of carbon dioxide increase) only a few parts of the Pacific will have levels of aragonite saturation adequate for coral growth. Additionally, if atmospheric carbon dioxide reaches 800 ppm, the ocean surface water pH decrease will be 0.4 units and total dissolved carbonate ion concentration will have decreased by at least 60%. Recent estimates state that with business-as-usual emission levels, the atmospheric carbon dioxide could reach 800 ppm by the year 2100. At this point, it is almost certain that all reefs of the world will be in erosional states. Increasing the pH and replicating pre-industrialization ocean chemistry conditions in the Great Barrier Reef, however, led to an increase in coral growth rates by 7%.
https://en.wikipedia.org/wiki?curid=51017707
2,011,810
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CMA activity declines with age in many cell types of old rodents and in cells of older humans. This impairment of CMA in aging is mainly due to a decrease in the levels of LAMP-2A at the lysosomal membrane, because of reduced stability of the CMA receptor and not due to decreased de novo synthesis. Studies in a transgenic mouse model in which normal levels of LAMP-2A are maintained throughout life, showed that these animals had ‘cleaner’ cells, better response to stress – and overall, a better health-span. These studies support the possible contribution of declined CMA activity to poor cellular homeostasis and inefficient response to stress characteristic of old organisms. High-fat diet inhibits CMA. This is because of a decrease in the stability of the CMA receptor at the lysosomal surface. More recently CMA has been implicated in the regeneration capacity of new blood cells by sustaining hematopoietic stem cell function.
https://en.wikipedia.org/wiki?curid=37860179
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Making up about two percent of cases of paralytic polio, bulbar polio occurs when poliovirus invades and destroys nerves within the bulbar region of the brain stem. The bulbar region is a white matter pathway that connects the cerebral cortex to the brain stem. The destruction of these nerves weakens the muscles supplied by the cranial nerves, producing symptoms of encephalitis, and causes difficulty breathing, speaking and swallowing. Critical nerves affected are the glossopharyngeal nerve (which partially controls swallowing and functions in the throat, tongue movement, and taste), the vagus nerve (which sends signals to the heart, intestines, and lungs), and the accessory nerve (which controls upper neck movement). Due to the effect on swallowing, secretions of mucus may build up in the airway, causing suffocation. Other signs and symptoms include facial weakness (caused by destruction of the trigeminal nerve and facial nerve, which innervate the cheeks, tear ducts, gums, and muscles of the face, among other structures), double vision, difficulty in chewing, and abnormal respiratory rate, depth, and rhythm (which may lead to respiratory arrest). Pulmonary edema and shock are also possible and may be fatal.
https://en.wikipedia.org/wiki?curid=25107
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Soon after the book's first publication, Bernard Bloch, editor of the prestigious journal "Language", gave linguist Robert Benjamin Lees, a colleague of Chomsky's at MIT, the opportunity to write a review of the book. Lees's very positive essay-length review appeared in the July–September 1957 issue of "Language". This early but influential review made "Syntactic Structures" visible on the linguistic research landscape. Shortly thereafter the book created a putative "revolution" in the discipline. Later, some linguists began to question whether this was really a revolutionary breakthrough. A critical and elaborate account is given in "Chomskyan (R)evolutions". Although Frederick Newmeyer states that "the publication of "Syntactic structures" has had profound effects, both intellectually for the study of language and sociologically for the field of linguistic", John R. Searle, three decades after his original review, wrote that "Judged by the objectives stated in the original manifestoes, the revolution has not succeeded. Something else may have succeeded, or may eventually succeed, but the goals of the original revolution have been altered and in a sense abandoned." As for "LSLT", it would be 17 more years before it saw publication.
https://en.wikipedia.org/wiki?curid=1790730
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The high cost of IGCC is the biggest obstacle to its integration in the power market; however, most energy executives recognize that carbon regulation is coming soon. Bills requiring carbon reduction are being proposed again both the House and the Senate, and with the Democratic majority it seems likely that with the next President there will be a greater push for carbon regulation. The Supreme Court decision requiring the EPA to regulate carbon (Commonwealth of Massachusetts et al. v. Environmental Protection Agency et al.)[20] also speaks to the likelihood of future carbon regulations coming sooner, rather than later. With carbon capture, the cost of electricity from an IGCC plant would increase approximately 33%. For a natural gas CC, the increase is approximately 46%. For a pulverized coal plant, the increase is approximately 57%. This potential for less expensive carbon capture makes IGCC an attractive choice for keeping low cost coal an available fuel source in a carbon constrained world. However, the industry needs a lot more experience to reduce the risk premium. IGCC with CCS requires some sort of mandate, higher carbon market price, or regulatory framework to properly incentivize the industry.
https://en.wikipedia.org/wiki?curid=4538124
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In 1988, Gallaudet University students decided that they would take matters of their education into their own hands. The sixth president of Gallaudet had announced in late 1987 that he would be resigning his position as president. By early 1988, the committee that selected the candidates had narrowed it down to three finalists, two of which, Dr. Harvey Corson and Dr. I. King Jordan, were deaf, and one of which, Dr. Elisabeth Zinser, was hearing. On March 6, it was announced hastily through press release (even though the selection committee was supposed to come on campus) that Zinser, the only hearing candidate, had become the seventh president of the university. There had been rallies beforehand for a deaf president (most notably on March 1), but on the 6th, the rallying changed into protest. Students and faculty went on marches, made signs, and gave demonstrations. The students locked the gates to the university and refused let the school open until Zinser resigned. Under intense pressure from the students protesting, Zinser resigned on the fifth day of the protest, March 10. Many students decided to stay on campus instead of going on Spring Break, which was scheduled to begin on March 11. Two days later, on March 13 Jane Spilman resigned and was replaced by Phil Bravin as chair of the Board of Trustees, a taskforce was created to figure out how to achieve a 51% majority of deaf people on the Board of Trustees, and no one received any punishment for being in the protest. I. King Jordan was named eighth president—and first deaf president—of Gallaudet University.
https://en.wikipedia.org/wiki?curid=34322525
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The future of space architecture hinges on the expansion of human presence in space. Under the historical model of government-orchestrated exploration missions initiated by single political administrations, space structures are likely to be limited to small-scale habitats and orbital modules with design life cycles of only several years or decades. The designs, and thus architecture, will generally be fixed and without real time feedback from the spacefarers themselves. The technology to repair and upgrade existing habitats, a practice widespread on Earth, is not likely to be developed under short term exploration goals. If exploration takes on a multi-administration or international character, the prospects for space architecture development by the inhabitants themselves will be broader. Private space tourism is a way the development of space and a space transportation infrastructure can be accelerated. Virgin Galactic has indicated plans for an orbital craft, SpaceShipThree. The demand for space tourism is one without bound. It is not difficult to imagine lunar parks or cruises by Venus. Another impetus to become a spacefaring species is planetary defense.
https://en.wikipedia.org/wiki?curid=23516569
1,062,383
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More recently, the city of Detroit has started investing in urban green initiatives. In 2019, Mike Duggan, the mayor of Detroit, outlined plans to increase demolition of blighted properties in the city. One proposed way to revitalize Detroit was through the creation of community gardens, green spaces, and urban orchards. Detroit's largest upcoming project is the Joe Louis Greenway (JLG), a 32-mile non-motorized loop which will stretch from the downtown Detroit Riverfront to Highland Park. The trail is estimated to cost $50 million raising concerns from residents who feel the money could be better spent addressing the blight and unemployment in the city. The leaders of the project argue the JLG will bring neighborhood stabilization and development resulting in affordable housing and jobs. Scholars identify two potential trajectories for the project: green gentrification, where "open space will move into private hands, rather than being dedicated to community or public use", or green reparations where "projects would be undertaken with a specific intent of achieving social equity". Detroit's public officials have the opportunity and power to steer JLG along either of the paths, only one of which benefits predominately minority communities and areas of historical disinvestment.
https://en.wikipedia.org/wiki?curid=450257
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Longitudinal variations of physiological indices, as diverse as complete blood counts (CBC) or physical activity records collected by wearable devices, along individual aging trajectories revealed a linear increase of the organism state fluctuations range with age. The broadening could be explained by a progressive loss of physiological resilience measured by the inverse auto-correlation times of the organism state fluctuations. Extrapolation of this data suggested that organism state recovery time and variance could simultaneously diverge at a critical point of 120 – 150 years of age corresponding to a complete loss of resilience and hence should be incompatible with survival. The criticality resulting in the end of life is an intrinsic biological property of an organism that is independent of stress factors and signifies a fundamental or absolute limit of human lifespan. The evidence of the divergence of the organism state fluctuations and hence the loss of resilience at a limiting age of approximately 130 years can also be found in the age-dependent variation of the DNA-methylation profiles obtained from human blood samples.
https://en.wikipedia.org/wiki?curid=232786
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In June 1984, the collection of artifacts and films numbered 900 cataloged items. Examples of acquisitions of computers in the preceding year included an Apple 1, Burroughs B-500, Digital Equipment Corp. PDP-1, Franklin Ace 100, and IBM SAGE: AN/FSQ-7 components. Several types of memory were acquired, including core memory, plasma cell memory, rope memory, selectron tube, magnetic cards, mercury delay line, and fixed-head drum. In the following years noteworthy acquisitions of computers included: Amdahl 470V/6, Apollo Domain DN100 workstation, Control Data Little Character, Data General Eclipse, Evans & Sutherland Line Drawing System-2, Osborne 1, SCELBI 8H minicomputer, and a Sinclair ZX80. To the nascent historical software collection, the first BASIC written for the Altair and VisiCalc Beta Test Version 0.1 was added.
https://en.wikipedia.org/wiki?curid=3461266
1,766,604
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Teller was one of the strongest and best-known advocates for investigating non-military uses of nuclear explosives, which the United States explored under Operation Plowshare. One of the most controversial projects he proposed was a plan to use a multi-megaton hydrogen bomb to dig a deep-water harbor more than a mile long and half a mile wide to use for shipment of resources from coal and oil fields through Point Hope, Alaska. The Atomic Energy Commission accepted Teller's proposal in 1958 and it was designated Project Chariot. While the AEC was scouting out the Alaskan site, and having withdrawn the land from the public domain, Teller publicly advocated the economic benefits of the plan, but was unable to convince local government leaders that the plan was financially viable.
https://en.wikipedia.org/wiki?curid=37782
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Paleontology in Utah refers to paleontological research occurring within or conducted by people from the U.S. state of Utah. Utah has a rich fossil record spanning almost all of the geologic column. During the Precambrian, the area of northeastern Utah now occupied by the Uinta Mountains was a shallow sea which was home to simple microorganisms. During the early Paleozoic Utah was still largely covered in seawater. The state's Paleozoic seas would come to be home to creatures like brachiopods, fishes, and trilobites. During the Permian the state came to resemble the Sahara desert and was home to amphibians, early relatives of mammals, and reptiles. During the Triassic about half of the state was covered by a sea home to creatures like the cephalopod "Meekoceras", while dinosaurs whose footprints would later fossilize roamed the forests on land. Sand dunes returned during the Early Jurassic. During the Cretaceous the state was covered by the sea for the last time. The sea gave way to a complex of lakes during the Cenozoic era. Later, these lakes dissipated and the state was home to short-faced bears, bison, musk oxen, saber teeth, and giant ground sloths. Local Native Americans devised myths to explain fossils. Formally trained scientists have been aware of local fossils since at least the late 19th century. Major local finds include the bonebeds of Dinosaur National Monument. The Jurassic dinosaur "Allosaurus fragilis" is the Utah state fossil.
https://en.wikipedia.org/wiki?curid=37799157
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In the late 1990s a consensus developed in the field of archaeology that archaeological data in digital form was highly fragile due to both an inadequate understanding of technical threats to its sustainability and the lack of an infrastructure to preserve it in the long term. In April 1996 a consortium comprising eight Departments of Archaeology from UK Universities joined forces with the Council for British Archaeology (CBA) to put a proposal to the Arts and Humanities Data Service Executive to establish an Archaeology Data Service. This service was to host a digital archive for archaeologists and to provide advice and guidance to the archaeological community on how to create and manage their digital datasets. As a result, the ADS was established at the University of York Department of Archaeology in September 1996 with two full-time members of staff and under the directorship of Professor Julian D. Richards. From 1996 until 2008 the ADS hosted AHDS Archaeology, a subject centre devoted to archaeology funded by the Arts and Humanities Research Council via the AHDS. The AHDS closed in March 2008 as a result of a controversial decision by the AHRC to withdraw funding. The ADS now receives funding directly from AHRC, rather than through the AHDS, it is also funded by other Higher Education and cultural heritage sector organisations including the European Union.
https://en.wikipedia.org/wiki?curid=23942156
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Without a National Science Foundation, the military stepped in, with the Office of Naval Research (ONR) filling the gap. The war had accustomed many scientists to working without the budgetary constraints imposed by pre-war universities. Bush helped create the Joint Research and Development Board (JRDB) of the Army and Navy, of which he was chairman. With passage of the National Security Act on July 26, 1947, the JRDB became the Research and Development Board (RDB). Its role was to promote research through the military until a bill creating the National Science Foundation finally became law. By 1953, the Department of Defense was spending $1.6 billion a year on research; physicists were spending 70 percent of their time on defense related research, and 98 percent of the money spent on physics came from either the Department of Defense or the Atomic Energy Commission (AEC), which took over from the Manhattan Project on January 1, 1947. Legislation to create the National Science Foundation finally passed through Congress and was signed into law by Truman in 1950.
https://en.wikipedia.org/wiki?curid=32767
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The series employs various degrees of safety- or courtesy-related censorship. Vulgar language is censored, as the show is considered family-friendly, and most such language occurs spontaneously when the team is surprised or overexcited; at other times, a deliberate effort is made to keep the scripted material clean. In addition to the standard bleep, the show often uses a relevant or humorous sound effect. Euphemisms and scientific terminology are used for potentially offensive terms. In the "Peeing on the Third Rail" myth, the show censored the valve used to release urine from the dummy. The names of ingredients used in the production of hazardous materials and some explosives are usually censored to prevent amateurs from recreating potentially dangerous substances. For example, in the "Hindenburg" special, Savage ignited thermite with a hypergolic mixture of "blur" (a syrupy, pale blue liquid) and "blur" (a dark powder). In a Civil War-themed episode, the ingredients for making a form of homemade black powder were censored in similar fashion.
https://en.wikipedia.org/wiki?curid=627304
81,418
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In the mid 20th century John Fleetwood Baker went on to develop the plasticity theory of structures, providing a powerful tool for the safe design of steel structures. The possibility of creating structures with complex geometries, beyond analysis by hand calculation methods, first arose in 1941 when Alexander Hrennikoff submitted his D.Sc thesis at MIT on the topic of discretization of plane elasticity problems using a lattice framework. This was the forerunner to the development of finite element analysis. In 1942, Richard Courant developed a mathematical basis for finite element analysis. This led in 1956 to the publication by J. Turner, R. W. Clough, H. C. Martin, and L. J. Topp's of a paper on the "Stiffness and Deflection of Complex Structures". This paper introduced the name "finite-element method" and is widely recognised as the first comprehensive treatment of the method as it is known today.
https://en.wikipedia.org/wiki?curid=17326228
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According to a French documentary television film "Tank on the Moon" by Jean Afanassieff, the Lunokhod design returned to the limelight 15 years later due to the Chernobyl nuclear power plant disaster on April 26, 1986. The East German-built remote controlled bulldozers available to Soviet civil defense troops weighed dozens of tons too heavy to operate on the remaining parts of the partially collapsed reactor building roof. Human labourers could not be employed to shovel debris since work shifts were limited to 90-second intervals due to intense ionizing radiation.
https://en.wikipedia.org/wiki?curid=45114
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The first bones of "Neovenator" were discovered in the summer of 1978, when a storm made part of the Grange Chine collapse. Rocks containing fossils fell to the beach of Brighstone Bay on the southwestern coast of the Isle of Wight. The rocks consisted of plant debris bed L9 within the variegated clays and marls of the Wessex Formation dating from the Barremian stage of the Early Cretaceous, about 125 million years ago. They were first collected by the Henwood family and shortly afterwards by geology student David Richards. Richards sent the remains to the Museum of Isle of Wight (now Dinosaur Isle) and the British Museum of Natural History. In the latter institution paleontologist Alan Jack Charig determined that the bones belonged to two kinds of animal: "Iguanodon" and some theropod. The ""Iguanodon"", later referred to "Mantellisaurus" and ultimately made the separate genus "Brighstoneus", generated the most interest and in the early 1980s a team was sent by the BMNH to secure more of its bones. On that occasion an additional theropod tail vertebra was discovered.
https://en.wikipedia.org/wiki?curid=2825408
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Veerabhadran "Ram" Ramanathan (born 24 November 1944) is Edward A. Frieman Endowed Presidential Chair in Climate Sustainability Scripps Institution of Oceanography, University of California, San Diego. He has contributed to many areas of the atmospheric and climate sciences including developments to general circulation models, atmospheric chemistry, and radiative transfer. He has been a part of major projects such as the Indian Ocean Experiment (INDOEX) and the Earth Radiation Budget Experiment (ERBE), and is known for his contributions to the areas of climate physics, Climate Change and atmospheric aerosols research. He is now the Chair of Bending the Curve: Climate Change Solutions education project of University of California. He has received numerous awards, and is a member of the US National Academy of Sciences. He has spoken about the topic of global warming, and written that "the effect of greenhouse gases on global warming is, in my opinion, the most important environmental issue facing the world today."
https://en.wikipedia.org/wiki?curid=19642269
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Hyperbaric (high-pressure) medicine uses special oxygen chambers to increase the partial pressure of around the patient and, when needed, the medical staff. Carbon monoxide poisoning, gas gangrene, and decompression sickness (the 'bends') are sometimes addressed with this therapy. Increased concentration in the lungs helps to displace carbon monoxide from the heme group of hemoglobin. Oxygen gas is poisonous to the anaerobic bacteria that cause gas gangrene, so increasing its partial pressure helps kill them. Decompression sickness occurs in divers who decompress too quickly after a dive, resulting in bubbles of inert gas, mostly nitrogen and helium, forming in the blood. Increasing the pressure of as soon as possible helps to redissolve the bubbles back into the blood so that these excess gasses can be exhaled naturally through the lungs. Normobaric oxygen administration at the highest available concentration is frequently used as first aid for any diving injury that may involve inert gas bubble formation in the tissues. There is epidemiological support for its use from a statistical study of cases recorded in a long term database.
https://en.wikipedia.org/wiki?curid=22303
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This technique analyzes the time difference between the excitation of the sample molecule and the release of energy as another photon. Repeating this process many times will give a decay profile. Pulsed lasers or LEDs can be used as a source of excitation. Part of the light passes through the sample, the other to the electronics as "sync" signal. The light emitted by the sample molecule is passed through a monochromator to select a specific wavelength. The light then is detected and amplified by a photomultiplier tube (PMT). The emitted light signal as well as reference light signal is processed through a constant fraction discriminator (CFD) which eliminates timing jitter. After passing through the CFD, the reference pulse activates a time-to-amplitude converter (TAC) circuit. The TAC charges a capacitor which will hold the signal until the next electrical pulse. In reverse TAC mode the signal of "sync" stops the TAC. This data is then further processed by an analog-to-digital converter (ADC) and multi-channel analyzer (MCA) to get a data output. To make sure that the decay is not biased to early arriving photons, the photon count rate is kept low (usually less than 1% of excitation rate).
https://en.wikipedia.org/wiki?curid=4136723
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Before the forming of the ARL, the United States Army had research facilities dating back to 1820 when the laboratory at Watertown Arsenal, Massachusetts, studied pyrotechnics and waterproof paper cartridges. This facility would evolve into the Materials Technology Laboratory. Most pre-WWII military research occurred within the military by military personnel, but in 1945, the Army published a policy affirming the need for civilian scientific contributions in military planning and weapons production. Non-military involvement before this time was frequent; however, methods for contribution to warfare technology was on limited and incidental basis. On June 11, 1946, a new research and development division of the War Department General Staff was created; however, due to internal forces within the military which supported the traditional technical service structure the division was closed. A variety of reorganizations took place over the next four decades, which put many organizations in command of Army research and development. Often commanders of these organizations were advocates of the reorganization, while some middle level management was opposed to the change.
https://en.wikipedia.org/wiki?curid=3678878
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The TS040's design permitted four-wheel drive, and its chassis consisted of carbon fibre and aluminium materials. Front airflow to cool the chassis was enabled with exit ducts under the wing mirror stalk at the back of the front wheel guards. Independent push-rod suspensions are linked to a bellcrank, and the torsion bar is mounted at the pivot point. Total, Toyota's petrol supplier, worked with the team to enhance fuel efficiency and performance. The car's seven-speed sequential gearbox was made of aluminium, and the multiplate clutch was supplied to Toyota by ZF Friedrichshafen. The TS040's driveshaft was the constant-velocity joint type (including tripods), with a viscous-constructed mechanical locking differential. The dual-circuit Brembo brake discs, made of lightweight carbon ceramic materials, enabled hydraulically-activated power steering. Michelin remained the team's tyre supplier.
https://en.wikipedia.org/wiki?curid=41475424
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The two most frequently measured cosmogenic nuclides are beryllium-10 and aluminum-26. These nuclides are particularly useful to geologists because they are produced when cosmic rays strike oxygen-16 and silicon-28, respectively. The parent isotopes are the most abundant of these elements, and are common in crustal material, whereas the radioactive daughter nuclei are not commonly produced by other processes. As oxygen-16 is also common in the atmosphere, the contribution to the beryllium-10 concentration from material deposited rather than created "in situ" must be taken into account. Be and Al are produced when a portion of a quartz crystal (SiO) is bombarded by a spallation product: oxygen of the quartz is transformed into Be and the silicon is transformed into Al. Each of these nuclides is produced at a different rate. Both can be used individually to date how long the material has been exposed at the surface. Because there are two radionuclides decaying, the ratio of concentrations of these two nuclides can be used without any other knowledge to determine an age at which the sample was buried past the production depth (typically 2–10 meters).
https://en.wikipedia.org/wiki?curid=23722965
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The "Ezh2" gene (enhancer of zeste homolog 2) is a component of polycomb repressive complex 2 (PRC2). This histone methyltransferase performs its biological activity by catalyzing the trimethylation of histone 3 lysine 27 (H3K27me3). The biological function of this gene allows for it to transcriptionally repress the target, "Hox", inhibitor genes of osteochodrogenesis. "Ezh2" is crucial for epigenetic regulation of specific patterning during osteochondrogenesis, or bone and cartilage development, of the craniofacial skeletal elements. By repressing inhibitors, "Ezh2" promotes bone and cartilage formation in facial skeletal features arising from the neural crest. Above average "Ezh2" expression has become a biological marker for the most aggressive form for breast cancer known as Inflammatory Breast Cancer (IBC). But in 2013, a study performed by Zhaomei Mu and his associates concluded that the knockdown gene for "Ezh2" inhibited both the migration and invasion of IBC cells. Also "in vivo", its knockdown gene suppressed tumor growth, most likely by the presence of fewer blood vessels, or reduced angiogenesis, in the "Ezh2" knockdown tumor versus "Ezh2" tumors.
https://en.wikipedia.org/wiki?curid=50133413
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The National Conference on Undergraduate Research (NCUR) was established at University of North Carolina at Asheville in 1987 with 400 students from campuses countrywide presenting their work. From its inception, NCUR included students from the sciences, the arts, the humanities, and the social sciences. Students were encouraged to present their work in collaboration with faculty members in a variety of media and formats from posters to performances. NCUR continued and expanded, beginning to move to different campus hosts in 1989. Currently approximately 4000 students participate annually, drawn from all fields and from any college or university. The Council on Undergraduate Research (CUR) was established in 1987 also with a focus on faculty chemistry research at primarily undergraduate institutions that included the students as co-investigators with their faculty mentors. Over time, CUR welcomed other sciences and then non-sciences and also added an At Large group. The two organizations co-existed until 2010 when they decided to combine forces. Currently, the combined organization is called CUR and it sponsors a NCUR each year.
https://en.wikipedia.org/wiki?curid=5100323
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On April 23, 2014, the Federal Communications Commission (FCC) was reported to be considering a new rule that would permit Internet service providers to offer content providers a faster track to send content, thus reversing their earlier net neutrality position. A possible solution to net neutrality concerns may be municipal broadband, according to Professor Susan Crawford, a legal and technology expert at Harvard Law School. On May 15, 2014, the FCC decided to consider two options regarding Internet services: first, permit fast and slow broadband lanes, thereby compromising net neutrality; and second, reclassify broadband as a telecommunication service, thereby preserving net neutrality. On November 10, 2014, President Obama recommended the FCC reclassify broadband Internet service as a telecommunications service in order to preserve net neutrality. On January 16, 2015, Republicans presented legislation, in the form of a U.S. Congress HR discussion draft bill, that makes concessions to net neutrality but prohibits the FCC from accomplishing the goal or enacting any further regulation affecting Internet service providers (ISPs). On January 31, 2015, AP News reported that the FCC will present the notion of applying ("with some caveats") Title II (common carrier) of the Communications Act of 1934 to the internet in a vote expected on February 26, 2015. Adoption of this notion would reclassify internet service from one of information to one of telecommunications and, according to Tom Wheeler, chairman of the FCC, ensure net neutrality. The FCC is expected to enforce net neutrality in its vote, according to "The New York Times".
https://en.wikipedia.org/wiki?curid=13692
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In the area of evidence-based guidelines and policies, the explicit insistence on evidence of effectiveness was introduced by the American Cancer Society in 1980. The U.S. Preventive Services Task Force (USPSTF) began issuing guidelines for preventive interventions based on evidence-based principles in 1984. In 1985, the Blue Cross Blue Shield Association applied strict evidence-based criteria for covering new technologies. Beginning in 1987, specialty societies such as the American College of Physicians, and voluntary health organizations such as the American Heart Association, wrote many evidence-based guidelines. In 1991, Kaiser Permanente, a managed care organization in the US, began an evidence-based guidelines program. In 1991, Richard Smith wrote an editorial in the "British Medical Journal" and introduced the ideas of evidence-based policies in the UK. In 1993, the Cochrane Collaboration created a network of 13 countries to produce systematic reviews and guidelines. In 1997, the US Agency for Healthcare Research and Quality (AHRQ, then known as the Agency for Health Care Policy and Research, or AHCPR) established Evidence-based Practice Centers (EPCs) to produce evidence reports and technology assessments to support the development of guidelines. In the same year, a National Guideline Clearinghouse that followed the principles of evidence-based policies was created by AHRQ, the AMA, and the American Association of Health Plans (now America's Health Insurance Plans). In 1999, the National Institute for Clinical Excellence (NICE) was created in the UK.
https://en.wikipedia.org/wiki?curid=10013
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