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Demographic analysis examines and measures the dimensions and dynamics of populations; it can cover whole societies or groups defined by criteria such as education, nationality, religion, and ethnicity. Educational institutions usually treat demography as a field of sociology, though there are a number of independent demography departments. These methods have primarily been developed to study human populations, but are extended to a variety of areas where researchers want to know how populations of social actors can change across time through processes of birth, death, and migration. In the context of human biological populations, demographic analysis uses administrative records to develop an independent estimate of the population. Demographic analysis estimates are often considered a reliable standard for judging the accuracy of the census information gathered at any time. In the labor force, demographic analysis is used to estimate sizes and flows of populations of workers; in population ecology the focus is on the birth, death, migration and immigration of individuals in a population of living organisms, alternatively, in social human sciences could involve movement of firms and institutional forms. Demographic analysis is used in a wide variety of contexts. For example, it is often used in business plans, to describe the population connected to the geographic location of the business. Demographic analysis is usually abbreviated as DA. For the 2010 U.S. Census, The U.S. Census Bureau has expanded its DA categories. Also as part of the 2010 U.S. Census, DA now also includes comparative analysis between independent housing estimates, and census address lists at different key time points.
https://en.wikipedia.org/wiki?curid=45642
365,780
1,350,777
At this juncture, Rome was crushed by an invasion of central Italy by the Gallic Senones tribe. Routed in the Battle of the River Allia in 386 BC, the Roman army fled to Veii, leaving their city at the mercy of the Gauls, who proceeded to ransack it and then demand a huge ransom in gold to leave. The effects of this disaster on Roman power are a matter of controversy between scholars. The ancient authors emphasize the catastrophic nature of the damage, claiming that it took a long time for Rome to recover. Cornell, however, argues that the ancients greatly exaggerated the effects and cites the lack of archaeological evidence for major destruction and the building of the so-called "Servian" Wall as evidence that Rome recovered swiftly. The wall, whose 11 km-circuit enclosed 427 hectares (an increase of 50% over the Tarquinian city) was a massive project that would have required an estimated five million man-hours to complete, implying plentiful financial and labour resources. Against this, Eckstein argues that the history of Rome in the fifty years subsequent to 386 BC appears a virtual replay of the previous century. There were wars against the same enemies except Veii (i.e. the Volsci, Aequi, and Etruscans) in the same geographical area, and indeed against other Latin city-states, such as Praeneste and Tibur, just 30 miles away. In addition, a treaty concluded with Carthage in c. 348 BC seems to describe Rome's sphere of control as much the same area as in a previous treaty signed in the first years of the Republic 150 years earlier: just Old Latium, and not even all of that.
https://en.wikipedia.org/wiki?curid=25818724
1,350,031
1,566,463
Subsequently, in early 1968, Drake and Schweitzer unofficially, as friends, founded the company Windsurfing International in Southern California to manufacture, promote and license Drake's Windsurfer design. Drake's Santa Monica home address, the place where he had invented windsurfing, was listed as their business's first address. Soon after their "gentleman's handshake deal" Drake was asked by his employer to temporarily relocate himself and his family to the other side of the country to serve as a top level air and space engineer at the Pentagon in Washington DC. Unfortunately Mr. Drake, never signed a formal legal agreement with Mr. Schweitzer, which opened the door for Schweitzer to legally incorporate Windsurfing International as a firm without including Drake as a partner. Drake believed that because he and Schweitzer were joined on the patent that they also were partners at Windsurfing International, and he further believed that because his relation to Schweitzer and his family was warm, cordial and trusting that Schweitzer would act in good faith to protect and foster Drake's interests in their young sport while he was away for two years on other important business. Drake learned the hard way that business can quickly erode relationships. Schweitzer signed lucrative contacts and collected royalty fees to license the production of over 100,000 Windsurfers in Europe without ever informing Drake or sharing any of the proceeds.
https://en.wikipedia.org/wiki?curid=23117343
1,565,576
2,024,392
Hertel was born in Bad Salzungen, Thuringia. After his Abitur in the special branch for music in Wernigerode, Hertel studied musicology in Halle from 1969 to 1973. Afterwards he was a master student for composition at the Academy of Arts, Berlin with Siegfried Matthus. From 1974 to 1982, he was head of incidental music at the Staatsschauspiel Dresden and worked as a freelance composer and head of the Young Composers Section in the Dresden Composers' Association (commissioned operas "Leonce and Lena" and "Till"). He received composition prizes in Halle and the Hans Stieber Prize of the Radio of the GDR. After his compositional promotion (among others by the two Leipzig music publishers Peters and Deutscher Verlag für Musik), he was banned from working on and realising cross-genre projects. After leaving Germany in 1985 for artistic and cultural-political reasons, he devoted himself primarily to the realisation of musical-scenic projects; among them "Cernunnos for 7 reed players, bulls and live electronics" for the 1993 Donaueschinger Musiktage edition with the ; the opening installation for the 1996 Lucerne International Music Festival "aus der erde durch den wind" - a mobile open-air music for various wind, vocal and bell ensembles and the sound transport of natural sound samples, and in 1999 the cartoon opera "Das Biest des Monsieur Racine" after Tomi Ungerer commissioned by the Theater Basel. In 1991, he received the Art Prize of the City of Munich for experimental theatre. He has held teaching posts at music academies and drama schools among others in Hamburg, Bochum, Frankfurt and Munich. He has realised numerous commissioned works, song recitals and theatre music for over 40 German-speaking theatres. From 2002 to 2008, he was head of incidental music at the ; there he created the experimental musical-scenic series "mund & knie 1-12", for which he was awarded the Leipzig Theatre Prize in 2009.
https://en.wikipedia.org/wiki?curid=66412243
2,023,228
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The simpler and somewhat more economical alternative was the Joly screen process. This required no special camera or viewer, just a special color-compensating filter for the camera lens and a special holder for the photographic plates. The holder contained the heart of the system: a clear glass plate on which very fine lines of three colors had been ruled in a regular repeating pattern, completely covering its surface. The idea was that instead of taking three separate complete photographs through three colored filters, the filters could be in the form of a large number of very narrow strips (the colored lines) allowing the necessary color information to be recorded in a single compound image. After the negative was developed, a positive transparency was printed from it and a viewing screen with red, green and blue lines in the same pattern as the lines of the taking screen was applied and carefully aligned. The colors then appeared as if by magic. The transparency and screen were very like the layer of monochrome liquid crystal elements and overlay of hair-thin red, green and blue color filter stripes which create the color image in a typical LCD display. This was the invention of Irish scientist John Joly, although he, like so many other inventors, eventually discovered that his basic concept had been anticipated in Louis Ducos du Hauron's long-since-expired 1868 patent.
https://en.wikipedia.org/wiki?curid=444758
270,529
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Seagrass are a group of about 60 angiosperm species that have adapted to an aquatic life, and can grow in meadows along the shores of all continents except Antarctica. Seagrass meadows form in maximum depths of up to 50 metres, depending on water quality and light availability, and can include up to 12 different species in one meadow. These seagrass meadows are highly productive habitats that provide many ecosystem services, including sediment stabilization, habitat and biodiversity, better water quality, and carbon and nutrient sequestration. The current documented seagrass area is 177,000 km, but is thought to underestimate the total area since many areas with large seagrass meadows have not been thoroughly documented. Most common estimates are 300,000 to 600,000 km, with up to 4,320,000 km suitable seagrass habitat worldwide. Although seagrass makes up only 0.1% of the area of the ocean floor, it accounts for approximately 10–18% of the total oceanic carbon burial. Currently global seagrass meadows are estimated to store as much as 19.9 Pg (gigaton, or billion tons) of organic carbon. There has been considerable attention to how large-scale seaweed cultivation in the open ocean can act as a form of carbon sequestration. Academic studies have demonstrated that nearshore seaweed forests constitute a source of blue carbon, as seaweed detritus is carried by wave currents into the middle and deep ocean thereby sequestering carbon.
https://en.wikipedia.org/wiki?curid=36995466
574,704
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Over 21 million people were killed or injured in World War I; in many cases, all of the men in one family were killed, numerous cities in Europe were destroyed, and family life throughout the world was greatly affected. While the United States suffered the fewest casualties, family life was still greatly affected as husbands were deployed and wives had to begin working. As the war draft suddenly removed many men from factory work, the factories began soliciting for women workers in traditionally male-dominated areas. Therefore, women had less time to spend at home with the children, as many of them would have before the war. As fathers, uncles, brothers, and grandfathers deployed in military service, women filled their places in factories and offices, changing the ways young children and teens received home nurturing. Additionally, women moving into new roles in society had lasting effects on children and family life after the war. President Woodrow Wilson stated, "We have made partners of the women in this war; shall we admit them only to a partnership of suffering and sacrifice and toil and not to a partnership of privilege and right?" As women began working in the factories, more of society began to realize the need for women's rights; while women had been granted suffrage (voting rights) to varying degrees in several states beginning in the late 19th century, they were now guaranteed full suffrage throughout the United States by the 19th Amendment to the United States Constitution passed in August, 1920. This also paved the way for the children of future generations by creating greater career opportunities for girls and women; as women gained a stronger voice, girls became more involved in the workforce and education and prepared for roles outside of the home. Additionally, family life was affected after the war as more and more women entered the work force, moving away from the traditional stay-at-home mother and housewife role.
https://en.wikipedia.org/wiki?curid=26048493
1,726,857
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The Arash sniper rifle is a semi-automatic weapon with rotating bolt and gunpowder gas system has an eight riflings straight back from left to right. It is 180 cm-long weapon, and is equipped with optical cameras. It is typically used as a shoulder-fired weapon. The rifle weighs between 18 and 20 kilograms, and fires 20 mm ammunition. It is fired in a standing position with a forward bipod and the gun resting over the user's shoulder, similar to an RPG. The stock is positioned midway along the length of the weapon with the pistol grip just forward of it. It is arranged in a bullpup configuration with the trigger assembly forward of the magazine, which is loaded behind the user's back, making reloading awkward. The recoil of firing a 20 mm round is mitigated by a huge cone-shaped quadruple baffle muzzle brake and the design of the gun which makes it pivot on the operator's shoulder. The scope appears to use a copy of the Barrett Optical Ranging System (BORS), which calculates atmospheric conditions to determine the rifle's optimal position to take an accurate shot. The position of the scope is relatively high, making it difficult to fire the rifle in the prone position, so the Iranians operate it using two-man motorcycle teams to perform "shoot and scoot" tactics. The Arash can be used to target hostile helicopters at a range of approximately 2,000 meters, and has the ability to be used against ground and armored targets as well as enemy trenches.
https://en.wikipedia.org/wiki?curid=53191891
1,482,784
1,876,424
While there are differing accounts, it's generally acknowledged that the world's first aerial forest patrol was flown as a demonstration for the US Forest Service on 29 June 1915 at Trout Lake, Wisconsin in a Curtiss Flying Boat by aviation pioneer and wealthy Chicago sportsman Logan “Jack” Vilas. The idea took hold and US Forest Service later joined with the Army Air Service in 1919 to operate regular aerial fire patrols over national forests. However, lack of wireless radios for communication between the pilot and the ground was a major problem and the program paused in 1925.Discussion took place between the Forests Commission Victoria (FCV) and the Air Board as early as 1926, and then over a period of years prior to 1929-30, with the view to commencing regular fire patrols using RAAF aircraft but a lack of safe landing areas proved the main obstacle. Eventually, the first fire spotting aircraft in Victoria was deployed on 18 February 1930 when a RAAF Westland Wapiti from No.1 Squadron operating out of Point Cook near Melbourne flew over the nearby Dandenong Ranges. This is also believed to be an Australian first.
https://en.wikipedia.org/wiki?curid=57882206
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Ultrasonication offers great potential in the processing of liquids and slurries, by improving the mixing and chemical reactions in various applications and industries. Ultrasonication generates alternating low-pressure and high-pressure waves in liquids, leading to the formation and violent collapse of small vacuum bubbles. This phenomenon is termed cavitation and causes high speed impinging liquid jets and strong hydrodynamic shear-forces. These effects are used for the deagglomeration and milling of micrometre and nanometre-size materials as well as for the disintegration of cells or the mixing of reactants. In this aspect, ultrasonication is an alternative to high-speed mixers and agitator bead mills. Ultrasonic foils under the moving wire in a paper machine will use the shock waves from the imploding bubbles to distribute the cellulose fibres more uniformly in the produced paper web, which will make a stronger paper with more even surfaces. Furthermore, chemical reactions benefit from the free radicals created by the cavitation as well as from the energy input and the material transfer through boundary layers. For many processes, this sonochemical (see sonochemistry) effect leads to a substantial reduction in the reaction time, like in the transesterification of oil into biodiesel.
https://en.wikipedia.org/wiki?curid=31780
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Electrical power is usually generated by electro-mechanical generators driven by steam produced from fossil fuel combustion, or the heat released from nuclear reactions; or from other sources such as kinetic energy extracted from wind or flowing water. The modern steam turbine invented by Sir Charles Parsons in 1884 today generates about 80 percent of the electric power in the world using a variety of heat sources. Such generators bear no resemblance to Faraday's homopolar disc generator of 1831, but they still rely on his electromagnetic principle that a conductor linking a changing magnetic field induces a potential difference across its ends. The invention in the late nineteenth century of the transformer meant that electrical power could be transmitted more efficiently at a higher voltage but lower current. Efficient electrical transmission meant in turn that electricity could be generated at centralised power stations, where it benefited from economies of scale, and then be despatched relatively long distances to where it was needed.
https://en.wikipedia.org/wiki?curid=9550
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The Soviet Buran program attempted to produce a class of spaceplanes launched from the Energia rocket, in response to the US Space Shuttle. It was intended to operate in support of large space-based military platforms as a response to the Strategic Defense Initiative. Buran only had orbital maneuvering engines, unlike the Space Shuttle, Buran did not fire engines during launch, instead relying entirely on Energia to lift it out of the atmosphere. It copied the airframe and thermal protection system design of the US Space Shuttle Orbiter, with a maximum payload of 30 metric tons (slightly higher than that of the Space Shuttle), and weighed less. It also had the capability to land autonomously. Due to this, some retroactively consider it to be the more capable launch vehicle. By the time the system was ready to fly in orbit in 1988, strategic arms reduction treaties made Buran redundant. On November 15, 1988, Buran and its Energia rocket were launched from Baikonur Cosmodrome in Kazakhstan, and after two orbits in three hours, glided to a landing a few miles from its launch pad. While the craft survived that re-entry, the heat shield was not reusable. This failure resulted from United States counter intelligence efforts. After this test flight, the Soviet Ministry of Defense would defund the program, considering it relatively pointless compared to its price.
https://en.wikipedia.org/wiki?curid=723059
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The development of planar technologies was driven at first by the needs of the US military, but today they can be found in mass-produced household items such as mobile phones and satellite TV receivers. According to Thomas H. Lee, Harold A. Wheeler may have experimented with coplanar lines as early as the 1930s, but the first documented planar transmission line was stripline, invented by Robert M. Barrett of the Air Force Cambridge Research Center, and published by Barrett and Barnes in 1951. Although publication did not occur until the 1950s, stripline had actually been used during World War II. According to Barrett, the first stripline power divider was built by V. H. Rumsey and H. W. Jamieson during this period. As well as issuing contracts, Barrett encouraged research in other organisations, including the Airborne Instruments Laboratory Inc. (AIL). Microstrip followed soon after in 1952 and is due to Grieg and Engelmann. The quality of common dielectric materials was at first not good enough for microwave circuits, and consequently, their use did not become widespread until the 1960s. Stripline and microstrip were commercial rivals. "Stripline" was the brand name of AIL who made air stripline. Microstrip was made by ITT. Later, dielectric-filled stripline under the brand name "triplate" was manufactured by Sanders Associates. "Stripline" became a generic term for dielectric filled stripline and "air stripline" or "suspended stripline" is now used to distinguish the original type.
https://en.wikipedia.org/wiki?curid=39288501
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Pearson (born 1 April 1972) grew up in Kidderminster where he attended Franche Middle School and Wolverley High School in Wolverley. His father had a keen interest in guitar and played in folk bands. This may have been an early inspiration for Ewan who played both piano and cello in his youth. Indeed, his early interest in synthesisers and programming led him to collaborate with schoolmates Gareth James and James Hill in the band "Sample the Dog". Most of the material was covers of Ewan's heroes New Order, Depeche Mode etc., but he also tried his hand at writing. Pearson admits in recent interviews that his writing was somewhat derivative, but it was his natural ability to accurately reproduce the sounds of his favourite synth bands that gave him a good grounding in programming and production. It was during this time that he developed his trademark production style that can still be heard in his work today. He attended Girton College, Cambridge, where he studied English literature and graduated with a first. He went on to study a master's degree in philosophy and cultural studies at Royal Holloway, University of London which focused in part on the place of dance music in popular culture and resulted in the publication of "Discographies" which he co-wrote with Jeremy Gilbert.
https://en.wikipedia.org/wiki?curid=7073958
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The hearth of every "prytaneion" and domestic household was sacred to the goddess Hestia, whose presence and cult within the "prytaneion" and households justified the civil, political and religious basis of the city's public life, and the community's decisions concerning treaties, laws, institutions and traditions. In founding a new colony, live embers of Hestia's fire were carried from the parent-"polis" to the colonial "prytaneion", where they were used to kindle the new colony's sacred, sacrificial fire. Without an "agora", sacrificial fire, altar and Hestia, there could be no city. This aside, "poleis" were largely self-defined; they need not be politically independent, they might use any of various regional Greek dialects and their size seems to have been an irrelevance to their definition as "poleis", or modern identification as "city-states". Some were enclosed within larger states. Some had only 200-500 male citizens and no more than a few square kilometers of agricultural land. Others were very populous, or became so through confederation, with estimated populations of many thousands, and with lands and influence extending many miles into surrounding countryside, or across the Mediterranean Sea. Land hunger and warfare were endemic. The two largest and most powerful of these states, Sparta and Athens, mutually antagonistic for much of their history, both acknowledged the same protective deities. Where Sparta chose conquest and subjection of its Greek-speaking neighbours to the immediate west (see Mantinea), Athens used her navy to help establish new, colonial "poleis" much further afield.
https://en.wikipedia.org/wiki?curid=40139134
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The Devils Mountain Fault separates two similar but distinctive ensembles of Mesozoic (pre-Tertiary, before the dinosaurs died) or older rock. On the north is the Helena—Haystack mélange (HH mélange, purple in the diagram at right), on the south the Western and Eastern mélange belts (WEMB, blue). There are some interesting relationships here. E.g., HH mélange rock has been found in Manastash Ridge, 110 km to the south (look for the small sliver of purple near the bottom of the diagram). Also, the sedimentary Chuckanut Formation (part of the NWCS, green) north of the DMF correlates to the Suak and Roslyn Formations just north of Manastash Ridge. All this is explained by right-lateral strike-slip motion on the Straight Creek Fault, which initiated about 50 to 48 Ma (millions of years ago). This is just after the terrane carrying the Olympic Mountains came into contact with the North American continent. These mélanges may have been off-shore islands or seamounts that were caught between the Olympic terrane and the North American continent, and were pushed up (obducted) onto the latter. Other similar rock has been found at the Rimrock Lake Inlier (bottom of diagram), in the San Juan Islands, and in the Pacific Coast Complex along the West Coast Fault on the west side of Vancouver Island. It appears the entire DDMFZ and Leech River fault system was pushed onto the early continental margin from an original alignment along the OWL. This is an important observation because the Strawberry Point, Utsalady Point, Southern Whidbey Island, and various other unnamed faults lying between the DDMFZ and the OWL – all of which converge at the western end of the DDMFZ – seem to be intermediate versions of the DDMFZ.
https://en.wikipedia.org/wiki?curid=27651043
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Aquaponics offers a diverse and stable polyculture system that allows farmers to grow vegetables and raise fish at the same time. By having two sources of profit, farmers can continue to earn money even if the market for either fish or plants goes through a low cycle. The flexibility of an aquaponic system allows it to grow a large variety of crops including ordinary vegetables, herbs, flowers and aquatic plants to cater to a broad spectrum of consumers. Herbs, lettuce and speciality greens such as basil or spinach are especially well suited for aquaponic systems due to their low nutritional needs. For the growing number of environmentally conscious consumers, products from aquaponic systems are organic and pesticide free, whilst also leaving a small environmental footprint. Aquaponic systems additionally are economically efficient due to low water usage, effective nutrient cycling and needing little land to operate. Because soil isn't needed and only a little bit of water is required, aquaponic systems can be set up in areas that have traditionally poor soil quality or contaminated water. More importantly, aquaponic systems are usually free of weeds, pests and diseases that would affect soil, which allows them to consistently and quickly produce high quality crops to sell.
https://en.wikipedia.org/wiki?curid=466801
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Artificial photosynthesis uses techniques including nanotechnology to store solar electromagnetic energy in chemical bonds by splitting water to produce hydrogen and then using carbon dioxide to make methanol. Researchers in this field strived to design molecular mimics of photosynthesis that use a wider region of the solar spectrum, employ catalytic systems made from abundant, inexpensive materials that are robust, readily repaired, non-toxic, stable in a variety of environmental conditions and perform more efficiently allowing a greater proportion of photon energy to end up in the storage compounds, i.e., carbohydrates (rather than building and sustaining living cells). However, prominent research faces hurdles, Sun Catalytix a MIT spin-off stopped scaling up their prototype fuel-cell in 2012, because it offers few savings over other ways to make hydrogen from sunlight.
https://en.wikipedia.org/wiki?curid=25784
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FT8 or Franke & Taylor 8 is a frequency shift keying digital mode which was released on June 29, 2017, by the creators Joe Taylor, K1JT and Steve Franke, K9AN along with the software package WSJT. FT8 is a popular form of digital weak signal communication used primarily by amateur radio operators to communicate on amateur radio bands with a majority of traffic occurring on the HF amateur bands. It is currently the most popular digital mode on spotting networks such as PSK Reporter. The mode offers operators the ability to communicate in unfavorable environments such as during low sun spot numbers, high RF noise, or during low power operations. With advances in signal processing technology FT8 is able to decode signals with a signal to noise ratio as low as −20 dB, which is significantly lower than CW or SSB transmissions. The mode works by sending signals in 15-second-blocks with 12.64 seconds of transmission time and 2.36 seconds of decode time, this gives the mode five words per minutes effective transmission. The mode requires each computer to be synced up in time with each other with most users making use of either NTP or GPS to ensure transmissions fall in the proper window. This allows FT8 transmission to support up to 13 characters, the mode uses forward error correction to ensure proper transmission and decoding. As the mode is quite limited in the number of words that it can send, it only sends enough information to ensure a contact with each station. There are multiple uses for FT8 including contesting, testing antennas, and for scientific research.
https://en.wikipedia.org/wiki?curid=55681284
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In November 1936, the U.S. Army's cavalry branch decided to modernize and needed a fully armored vehicle, capable of keeping up with the cavalry and of fulfilling regular combat duties. Prohibited from developing tanks by the National Defense Act of 1920, it could not develop a "tank" in the conventional sense, so opted for a smaller and lighter "car" class vehicle. It came up with the T7 Combat Car, designed and built at the Rock Island Arsenal between 1937 and 1938, which was based on the M1 Combat Car but with an extended chassis and a convertible suspension - the ability to travel using wheels or tracks. The only prototype T7 Combat Car (No. W40223) was shipped to Aberdeen Proving Grounds in August 1938 for testing. While it showed good speed and performance, cavalry branch representatives were not impressed. Tests were delayed until 1939, but they were reasonably successful. The vehicle even participated in the First Army maneuvers at Plattsburgh, New York, in 1939, where the cavalrymen liked it. However, in October 1939, the cavalry branch formed new requirements for their combat vehicles which specified regular tracked (not combined) suspension. The reason for that decision was that the tracks were already available in reasonable quantity and quality and thus there was no need for the complexity and higher cost associated with convertible vehicles.[2] Furthermore, the heavy M2 Browning machine gun it was equipped with was determined insufficient for the role. The ongoing war in Europe at the time proved that, in order for a vehicle to be successful, it needed a proper cannon. In October 1939, despite its potential, the Mechanized Cavalry Board recommended further development and test of the T7 Combat Car program, and all other such convertible vehicles, be canceled, marking the end of wheel-tracked combat vehicle development for the U.S. Army.
https://en.wikipedia.org/wiki?curid=25658417
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International experiments were selected by the CMSA and the United Nations Office for Outer Space Affairs (UNOOSA) in a UN session in 2019. 42 applications were submitted, and nine experiments were accepted. Some of the experiments are a continuation to the ones on Tiangong-2 such as POLAR-2, an experiment of researching Gamma-ray burst polarimetry, proposed by Switzerland, Poland, Germany and China. Canadian Professor Dr. Tricia Larose from the University of Oslo develops a cutting-edge cancer research experiment for the station. The 31-day experiment will test to see if weightlessness has a positive effect in stopping cancer growth. The High Energy Cosmic Ray Detector project is conducted by a 200 scientists team from Europe, mainland China, Hong Kong, and Taiwan. Under UNOOSA framework, Tiangong is also expected to host experiments from Belgium, France, Germany, India, Italy, Japan, Kenya, Mexico, the Netherlands, Peru, Russia, Saudi Arabia, and Spain, involving 23 institutions and 17 countries.
https://en.wikipedia.org/wiki?curid=2481401
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In December 2019, the virus COVID-19 emerged as a threat to worldwide public health and, over the following years, ignited novel inquiry into modern-age medical ethics. For example, since the first discovery of COVID-19 in Wuhan, China and subsequent global spread by mid-2020, calls for the adoption of Open Science principles dominated research communities. Some academics believed that Open Science principles — like constant communication between research groups, rapid translation of study results into public policy, and transparency of scientific processes to the public — represented the only solutions to halt the impact of the virus. Others, however, cautioned that these interventions may lead to side-stepping safety in favor of speed, wasteful use of research capital, and creation of public confusion. Drawbacks of these practices include resource-wasting and public confusion surrounding the use of hydroxychloroquine and azithromycin as treatment for COVID-19 — a combination which was later shown to have no impact on COVID-19 survivorship and carried notable cardiotoxic side-effects — as well as a type of vaccine hesitancy specifically due to the speed at which COVID-19 vaccines were created and made publicly available. However, Open Science also allowed for the rapid implementation of life-saving public interventions like wearing masks and social distancing, the rapid development of multiple vaccines and monoclonal antibodies that have significantly lowered transmission and death rates, and increased public awareness about the severity of the pandemic as well as explanation of daily protective actions against COVID-19 infection, like hand washing.
https://en.wikipedia.org/wiki?curid=237248
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The Next Generation Science Standards (NGSS) are based on the "Framework K–12 Science Education" that was created by the National Research Council. They have three dimensions that are integrated in instruction at all levels. The first is core ideas, which consists of specific content and subject areas. The second is science and engineering practices. Students are expected not just to learn content but to understand the methods of scientists and engineers. Specific science and engineering practices that the Framework identifies as essential for all students to learn are identified and described in Appendix F of the Next Generation Science Standards. These practices are asking questions and defining problems; developing and using models; planning and carrying out investigations; analyzing and interpreting data; using mathematics and computational thinking; constructing explanations and designing solutions; engaging in argument from evidence; and obtaining, evaluating, and communicating information. The third is cross-cutting concepts: key underlying ideas that are common to a number of topics. The NGSS give equal emphasis to engineering design and to scientific inquiry. In addition, they are aligned with the Common Core State Standards by grade and level of difficulty. The standards describe "performance expectations" for students in the area of science and engineering. They define what students must be able to do in order to show competency.
https://en.wikipedia.org/wiki?curid=38314163
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Within poetry, University of Cambridge alumni include the poets Edmund Spenser, author of "The Faerie Queene", metaphysical poets John Donne, who wrote "For Whom the Bell Tolls", George Herbert and Andrew Marvell, and John Milton, who is renowned for "Paradise Lost", Restoration poet and playwright John Dryden, pre-romantic poet Thomas Gray best known his "Elegy Written in a Country Churchyard", William Wordsworth, and Samuel Taylor Coleridge, whose joint work "Lyrical Ballads" is often cited as marking the beginning of the Romantic movement, later Romantics including Lord Byron and the post-romantic Lord Tennyson, authors of the best known carpe diem poems, including Robert Herrick known for "To the Virgins, to Make Much of Time" with the first line "Gather ye rosebuds while ye may", and Andrew Marvell, who authored "To His Coy Mistress", classical scholar and lyric poet A. E. Housman, war poets Siegfried Sassoon and Rupert Brooke, modernist T. E. Hulme, confessional poets Ted Hughes, Sylvia Plath, and John Berryman, and, more recently, Cecil Day-Lewis, Joseph Brodsky, Kathleen Raine, and Geoffrey Hill. At least nine Poets Laureate graduated from the University of Cambridge. University alumni have also made notable contributions to literary criticism, having produced, among others, F. R. Leavis, I. A. Richards, C. K. Ogden, and William Empson, often collectively known as the Cambridge Critics, the Marxists Raymond Williams, sometimes regarded as the founding father of cultural studies, and Terry Eagleton, author of "Literary Theory: An Introduction", the most successful academic book ever published, the aesthetician Harold Bloom, new historicist Stephen Greenblatt, and biographical writers including Lytton Strachey, a central figure in the Bloomsbury Group, Peter Ackroyd, and Claire Tomalin.
https://en.wikipedia.org/wiki?curid=25978572
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A large militia force arrived from Salem and Marblehead. They might have cut off Percy's route to Charlestown, but these men halted on nearby Winter Hill and allowed the British to escape. Some accused the commander of this force, Colonel Timothy Pickering, of permitting the troops to pass because he still hoped to avoid war by preventing a total defeat of the regulars. Pickering later claimed that he had stopped on Heath's orders, but Heath denied this. It was nearly dark when Pitcairn's Marines defended a final attack on Percy's rear as they entered Charlestown. The regulars took up strong positions on the hills of Charlestown. Some of them had been without sleep for two days and had marched in 21 hours, eight hours of which had been spent under fire. But now they held high ground protected by heavy guns from HMS "Somerset". Gage quickly sent over line companies of two fresh regiments—the 10th and 64th—to occupy the high ground in Charlestown and build fortifications. Although they were begun, the fortifications were never completed and would later be a starting point for the militia works built two months later in June before the Battle of Bunker Hill. General Heath studied the position of the British Army and decided to withdraw the militia to Cambridge.
https://en.wikipedia.org/wiki?curid=4321886
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A research result may be of scientific and commercial interest, but patents are normally only issued for practical processes, and so someone—not necessarily the researchers—must come up with a specific practical process. Another consideration is commercial value; for example, while there are many ways to accomplish nuclear fusion, the ones of commercial value are those that generate more energy than they require to operate. The process to commercially exploit research varies widely. It can involve licensing agreements or setting up joint ventures and partnerships to share both the risks and rewards of bringing new technologies to market. Other corporate vehicles, e.g. spin-outs, are used where the host organization does not have the necessary will, resources, or skills to develop new technology. Often these approaches are associated with raising of venture capital (VC) as a means of funding the development process, a practice more common in the United States than in the European Union, which has a more conservative approach to VC funding. Research spin-off companies are a popular vehicle of commercialisation in Canada, where the rate of licensing of Canadian university research remains far below that of the US.
https://en.wikipedia.org/wiki?curid=315952
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Weather nearly derailed the 1961 season. Late April snow storms delayed the opening of Duluth-area courses into the first week of May resulting in the cancellation of meets and leaving a little more than two weeks for try-outs and preparation for the conference tournament. A rescheduled meet against Superior State was the only pre-MIAC tournament competition UMD was able to accomplish and served as a team tryout. In beating the Yellowjackets. Ron Johnson and Tom Maas showed little rust after the winter lay-off shooting 73 and 77 respectively on a still partially snow-covered Nemadji Golf Course. Despite the truncated season, UMD found its game quickly and successfully defended its MIAC team title by three strokes over Macalester College. Balance was the key to UMD's victory. While no UMD golfer placed in the top three, Jim “Cub” Olson, Ron Johnson and Tom Maas all finished in the top ten with Rolle Hoch just missing out of that group. Unfortunately, while the team earned the right to play in the NAIA national tournament, the athletic department was unable to allocate funds to participate at the Shawnee Oklahoma event.
https://en.wikipedia.org/wiki?curid=50172482
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Plans for a Hubble successor materialized as the Next Generation Space Telescope project, which culminated in plans for the James Webb Space Telescope (JWST), the formal successor of Hubble. Very different from a scaled-up Hubble, it is designed to operate colder and farther away from the Earth at the L2 Lagrangian point, where thermal and optical interference from the Earth and Moon are lessened. It is not engineered to be fully serviceable (such as replaceable instruments), but the design includes a docking ring to enable visits from other spacecraft. A main scientific goal of JWST is to observe the most distant objects in the universe, beyond the reach of existing instruments. It is expected to detect stars in the early Universe approximately 280 million years older than stars HST now detects. The telescope is an international collaboration between NASA, the European Space Agency, and the Canadian Space Agency since 1996, and was launched on December 25, 2021, on an Ariane 5 rocket. Although JWST is primarily an infrared instrument, its coverage extends down to 600 nm wavelength light, or roughly orange in the visible spectrum. A typical human eye can see to about 750 nm wavelength light, so there is some overlap with the longest visible wavelength bands, including orange and red light.
https://en.wikipedia.org/wiki?curid=40203
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It seems that for the majority of its history, people in Lower Mesopotamia mostly lived in cities and the rise of village settlement only began in the second half of the second millennium BC when sites of more than two hectares constitute more than a quarter of known settlements. This 'ruralisation' of Babylonia continued in the following centuries. A large portion of the farmers must have resided in urban settlements, although some of these were quite small - surface area cannot decisively distinguish villages and cities (a site like Haradum, which is considered to be a city because of the buildings found in it, covered only 1 hectare). Nevertheless, texts indicate various types of rural settlement, whose exact nature is not easy to define: the /"kapru(m)" were some sort of hamlet or large farm, but some settlements that seem to be villages were referred to with the same terms used to refer to cities (particularly /"ālu(m)"). The only definite 'village' that has been excavated in the south is the site of Sakheri Sughir near Ur, which dates to the archaic period, but only a very small area of the site has been excavated and only a few parts of buildings have been identified. Elsewhere, rural people are attested in texts living in isolated brick farmhouses, camps of tents like nomads, or in reed huts ("huṣṣetu(m)") that were characteristic of the south. There were also centres - often fortified - which served as centres for the exploitation of large areas ("dunnu(m)" and "dimtu(m)", the latter literally meaning 'tower'). An example has been excavated in the Balikh valley at Tell Sabi Abyad which is a walled settlement measuring 60 x 60 metres containing a master's house, a steward's house, some administrative buildings, and a few other structures. Salvage excavations in the Hamrin basin in the Diyala valley have partially revealed several similar centres from the Kassite period, containing workshops of artisans (especially potters): Tell Yelkhi (a kind of rural manor), Tell Zubeidi, and Tell Imlihiye. Other things were also built in rural areas, such as cisterns, threshing floors, and granaries.
https://en.wikipedia.org/wiki?curid=59427724
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As the United States entered World War II, enrollment among male students dropped significantly, allowing female students to outnumber male students for the first time in the school's history. In 1945, UGA accepted a donation of about 100 paintings from the New York art collector Alfred Holbrook and created the Georgia Museum of Art. In 1946, the School of Veterinary Medicine was re-established as a separate school, 13 years after it was discontinued as part of the agricultural college. The following year, the quarterly literary journal "The Georgia Review" began publication. After Jonathan Rogers' brief tenure as president (1949–1950), Omer Clyde Aderhold started his 17-year-long stint as UGA president. During his tenure, the university sold Coordinate Campus to the U.S. Navy. He opened the school's main library, the Ilah Dunlap-Little Memorial Library, in 1952, and in 1964, established the School of Social Work. The university also built a new Science Center on South Campus consisting of six buildings. After UGA's pharmacy school moved to the new facility on the South Campus, the two portions of the campus took on distinct characteristics, with North Campus focused on arts, humanities, and law, and South Campus focused on natural sciences and agricultural programs.
https://en.wikipedia.org/wiki?curid=378232
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After outreach education operations in 1997 proved that the majority of population within the region had difficulty in understanding mathematics and science, the organization began developing hands-on programs that would help overcome these issues. In 1998, the Kentucky General Assembly appropriated $1.6 million for the construction of the building and another $1 million for the centers equipment. The awarded funds were based on figures provided by a consulting architect working under the assumption that costs were significantly lower than those required for a project built on the campus of a community college. The centers board of directors noticed this mistake and was forced to downsize the building plan. The new revised plans called for a facility, with an 85-seat, . planetarium, . exhibit area, . science classroom, gift shop and offices. In 2000, the organization received an additional $1 million for the construction of the building. Groundbreaking ceremonies were held on November 9, 2001 and construction began in September 2002. Finally in March 2004, the East Kentucky Center for Science, Mathematics and Technology, which was shortened to the Eastern Kentucky Science Center, opened to the public.
https://en.wikipedia.org/wiki?curid=28960158
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While tribocorrosion phenomena may affect many materials, they are most critical for metals, especially the normally corrosion resistant so-called passive metals. The vast majority of corrosion resistant metals and alloys used in engineering (stainless steels, titanium, aluminium etc.) fall into this category. These metals are thermodynamically unstable in the presence of oxygen or water and they derive their corrosion resistance from the presence at the surface of a thin oxide film, called the passive film, which acts as a protective barrier between the metal and its environment. Passive films are usually just a few atomic layers thick. Nevertheless, they can provide excellent corrosion protection because if damaged accidentally they spontaneously self-heal by metal oxidation. However, when a metal surface is subjected to severe rubbing or to a stream of impacting particles the passive film damage becomes continuous and extensive. The self-healing process may no longer be effective and in addition it requires a high rate of metal oxidation. In other words, the underlying metal will strongly corrode before the protective passive film is reformed, if at all. In such a case, the total material loss due to tribocorrosion will be much higher than the sum of wear and corrosion one would measure in experiments with the same metal where only wear or only corrosion takes place. The example illustrates the fact that the rate of tribocorrosion is not simply the addition of the rate of wear and the rate of corrosion but it is strongly affected by synergistic and antagonistic effects between mechanical and chemical mechanisms. To study such effects in the laboratory, one most often uses mechanical wear testing rigs which are equipped with an electrochemical cell. This permits one to control independently the mechanical and chemical parameters. For example, by imposing a given potential to the rubbing metal one can simulate the oxidation potential of the environment and in addition, under certain conditions, the current flow is a measure of the instantaneous corrosion rate. Volume loss due to electrochemical dissolution can be measured by Faraday's laws of electrolysis and subtracted from total volume loss in tribocorrosion so the sum of mechanical wear loss and the synergies can be calculated. For a deeper understanding tribocorrosion experiments are supplemented by detailed microscopic and analytical studies of the contacting surfaces.
https://en.wikipedia.org/wiki?curid=21574599
1,599,175
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In November 1844, the anonymously published popular science book "Vestiges of the Natural History of Creation", written by Scottish journalist Robert Chambers, widened public interest in the concept of transmutation of species. "Vestiges" used evidence from the fossil record and embryology to support the claim that living things had progressed from the simple to the more complex over time. But it proposed a linear progression rather than the branching common descent theory behind Darwin's work in progress, and it ignored adaptation. Darwin read it soon after publication, and scorned its amateurish geology and zoology, but he carefully reviewed his own arguments after leading scientists, including Adam Sedgwick, attacked its morality and scientific errors. "Vestiges" had significant influence on public opinion, and the intense debate helped to pave the way for the acceptance of the more scientifically sophisticated "Origin" by moving evolutionary speculation into the mainstream. While few naturalists were willing to consider transmutation, Herbert Spencer became an active proponent of Lamarckism and progressive development in the 1850s.
https://en.wikipedia.org/wiki?curid=29932
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The practice of variolation (also known as inoculation) first came out of East Asia. First writings documenting variolation in China appear around 1500. Scabs from smallpox victims who had the disease in its mild form would be selected, and the powder was kept close to body temperature by means of keeping it close to the chest, killing the majority of the virus and resulting in a more mild case of smallpox. Scabs were generally used when a month old, but could be used more quickly in hot weather (15–20 days), and slower in winter (50 days). The process was carried out by taking eight smallpox scabs and crushing them in a mortar with two grains of "Uvularia grandiflora" in a mortar. The powder was administered nasally through a silver tube that was curved at its point, through the right nostril for boys and the left nostril for girls. A week after the procedure, those variolated would start to produce symptoms of smallpox, and recovery was guaranteed. In India, where the European colonizers came across variolation in the 17th century, a large, sharp needle was dipped into the pus collected from mature smallpox sores. Several punctures with this needle were made either below the deltoid muscle or in the forehead, and then were covered with a paste made from boiled rice. Variolation spread farther from India to other countries in south west Asia, and then to the Balkans.
https://en.wikipedia.org/wiki?curid=20790125
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A high temperature anhydrous example is PCMOF2, which consists of sodium ions coordinated to a trisulfonated benzene derivative. To improve performance and allow for higher operating temperatures, water can be replaced as the proton carrier by less volatile imidazole or triazole molecules within the pores. The maximum temperature achieved was 150 °C with an optimum conductivity of 5 × 10 S/cm, which is lower than other current electrolyte membranes. However, this model holds promise for its temperature regime, anhydrous conditions, and ability to control the quantity of guest molecules within the pores, all of which allowed for the tunability of proton conductivity. Additionally, the triazole-loaded PCMOF2 was incorporated into a H/air membrane-electrode assembly and achieved an open circuit voltage of 1.18 V at 100 °C that was stable for 72 hours and managed to remain gas tight throughout testing. This was the first instance that proved MOFs could actually be implemented into functioning fuel cells, and the moderate potential difference showed that fuel crossover due to porosity was not an issue.
https://en.wikipedia.org/wiki?curid=1049596
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Schoonhoven and associates, from Blaney et al 1985 to Schoonhoven et al 1992, illuminate the interplay between chemoreceptor stimuli in Lepidoptera and Orthoptera. They used "Helicoverpa armigera", "Spodoptera littoralis", "S. frugiperda", "Chloridea virescens", and grasshoppers. They find that most insects respond immediately and roughly equally to phagostimulant indicating good food and phagodeterrent indicating a food to be avoided, or a material which is not food substances. They also present some divergent examples, both delayed response suggesting that food decisions were mediated by cognition and not just simple chemoreception and unequal chemoreceptor stimulation with gustatory cells firing equally when presented with any material, but deterrent cells firing to a greater degree for undesirable materials. (They also investigate similar questions of seeking/avoidance in common questions of dietary "balance" of protein and carbohydrate i.e. less risky dietary choices where toxins are not the deciding factor and find similar results, with some insects eating solely by chemoreception and some showing delayed decisions, suggesting cognition.) Both salicin and caffeine are antifeedants, and some of the Schoonhoven group's investigations test both the deterrence they produce and habituation to them. The Glendinning group has done some similar work. They find "Manduca sexta"s habituation to "salicin" to be cognitively mediated because deterrent sensory cell stimulation barely decreases even when avoidance ceases. On the other hand Glendinning et al 1999 finds "M. sexta" habituation to "caffeine" to be due to change in chemoreceptor activation because it decreases significantly, and at the same time as cessation of feeding avoidance. The same work tests the cross-effects of habituation between the two chemicals, finding that they probably share a second messenger. For both phagostimulus and deterrence stimuli they find that the effects of multiple stimulations by multiple substances upon the same cells, simultaneously produce additive effects, up to the cell's firing rate ceiling.
https://en.wikipedia.org/wiki?curid=15367337
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Cavalier-Smith has published extensively on the classification of protists. One of his major contributions to biology was his proposal of a new kingdom of life: the Chromista, although the usefulness of the grouping is questionable given that it is generally agreed to be an arbitrary (polyphyletic) grouping of taxa. He also proposed that all chromista and alveolata share the same common ancestor, a claim later refuted by studies of morphological and molecular evidence by other labs. He named this new group the Chromalveolates. He also proposed and named many other high-rank taxa, like Opisthokonta (1987), Rhizaria (2002), and Excavata (2002), though he himself consistently does not include Opisthonkonta as a formal taxon in his schemes. Together with Chromalveolata, Amoebozoa (he amended their description in 1998), and Archaeplastida (which he called Plantae since 1981) the six formed the basis of the taxonomy of eukaryotes in the middle 2000s. He has also published prodigiously on issues such as the origin of various cellular organelles (including the nucleus, mitochondria), genome size evolution, and endosymbiosis. Though fairly well known, many of his claims have been controversial and have not gained widespread acceptance in the scientific community to date. Most recently, he has published a paper citing the paraphyly of his bacterial kingdom, the origin of Neomura from Actinobacteria and taxonomy of prokaryotes.
https://en.wikipedia.org/wiki?curid=49392751
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His early research focused on an esoteric group of minerals, metamictization Nb-Ta-Ti oxides that are unusual because they have become amorphous due to radiation damage caused by the presence of radioactive elements. Over the past forty years, the early study of these unusual minerals has blossomed into a broadly based research program on radiation effects in complex ceramic materials. This has led to the development of techniques to predict the long-term behavior of materials, such as those used in radioactive waste disposal. He is the author or co-author of over 750 research publications and the editor or co-editor of 18 monographs, proceedings volumes or special issues of journals. He has published widely in mineralogy, geochemistry, materials science, nuclear materials, physics and chemistry in over 100 different ISI journals. He has been granted a patent for the development of a highly durable material for the immobilization of plutonium from dismantled nuclear weapons. He is a Founding Editor of the magazine, "Elements", which is now supported by 18 earth science societies. He is a Principal Editor for "Nano LIFE", an interdisciplinary journal focused on collaboration between physical and medical scientists. In 2014, he was appointed as one of the Founding Executive Editors of "Geochemical Perspective Letters" and to the Editorial Advisory Board for "Applied Physics Reviews".
https://en.wikipedia.org/wiki?curid=48770600
1,961,579
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New derivatives of daptomycin (Figure 9) were originally generated by exchanging the third NRPS subunit ("dptD") with the terminal subunits from the A54145 (Factor B1) or calcium-dependent antibiotic pathways to create molecules containing Trp13, Ile13, or Val13. "dptD" is responsible for incorporating the penultimate amino acid, 3-methyl-glutamic acid (3mGlu12), and the last amino acid, Kyn13, into the chain. This exchange was achieved without engineering the interpeptide docking sites. These whole-subunit exchanges have been coupled with the deletion of the Glu12-methyltransferase gene, with module exchanges at intradomain linker sites at Ala8 and Ser11, and with variations of natural fatty-acid side chains to generate over 70 novel lipopeptides in significant quantities; most of these resultant lipopeptides have potent antibacterial activities. Some of these compounds have "in vitro" antibacterial activities analogous to daptomycin. Further, one displayed ameliorated activity against an "E. coli" imp mutant that was defective in its ability to assemble its inherent lipopolysaccharide. A number of these compounds were produced in yields that spanned from 100 to 250 mg/liter; this, of course, opens up the possibility for successful scale-ups by fermentation techniques. Only a small percentage of the possible combinations of amino acids within the peptide core have been investigated thus far.
https://en.wikipedia.org/wiki?curid=1758235
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Advances in the biology of genomes have enabled geneticists to investigate the course of human evolution within centuries. Jonathan Pritchard and a postdoctoral fellow, Yair Field, counted the singletons, or changes of single DNA bases, which are likely to be recent because they are rare and have not spread throughout the population. Since alleles bring neighboring DNA regions with them as they move around the genome, the number of singletons can be used to roughly estimate how quickly the allele has changed its frequency. This approach can unveil evolution within the last 2,000 years or a hundred human generations. Armed with this technique and data from the UK10K project, Pritchard and his team found that alleles for lactase persistence, blond hair, and blue eyes have spread rapidly among Britons within the last two millennia or so. Britain's cloudy skies may have played a role in that the genes for light hair could also cause light skin, reducing the chances of vitamin D deficiency. Sexual selection could also favor blond hair. The technique also enabled them to track the selection of polygenic traits—those affected by a multitude of genes, rather than just one—such as height, infant head circumferences, and female hip sizes (crucial for giving birth). They found that natural selection has been favoring increased height and larger head and female hip sizes among Britons. Moreover, lactase persistence showed signs of active selection during the same period. However, evidence for the selection of polygenic traits is weaker than those affected only by one gene.
https://en.wikipedia.org/wiki?curid=54472601
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Ocular oncology, especially retinoblastoma, has been the principal research area of Honavar and he is known to have contributed to the understanding and treatment of various tumors affecting the ocular surface and orbit. Working on retinoblastoma, he developed various therapeutic and management protocols which included high-dose and periocular chemotherapy, adjuvant therapy to mitigate the high risk of metastasis and multimodal management of orbital affection of the disease and he is reported to have treated over 2000 pediatric retinoblastoma patients with a success rate above of 85%. At L. V. Prasad Eye Institute, he was the first to perform intra-ocular brachytherapy procedure, along with Vijay Anand Reddy. His studies have been documented by way of a number of articles of which many have been listed by online article repositories such as Google Scholar and ResearchGate. Besides, he has contributed chapters to books published by others. He is a section editor for "Asia Pacific Academy of Ophthalmology" and is a member of the advisory committee of International Council of Ophthalmology. He serves as the scientific program coordinator of Oculoplastic Association of India and has also mentored research scholars in their studies. The invited speeches delivered by him include the "BOPSS 2016" of the British Oculoplastic Surgery Society.
https://en.wikipedia.org/wiki?curid=53688917
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Global Census of Marine Life on Seamounts (commonly CenSeam) is a global scientific initiative, launched in 2005, that is designed to expand the knowledge base of marine life at seamounts. Seamounts are underwater mountains, not necessarily volcanic in origin, which often form subsurface archipelagoes and are found throughout the world's ocean basins, with almost half in the Pacific. There are estimated to be as many as 100,000 seamounts at least one kilometer in height, and more if lower rises are included. However, they have not been explored very much—in fact, only about half of one percent have been sampled—and almost every expedition to a seamount discovers new species and new information. There is evidence that seamounts can host concentrations of biologic diversity, each with its own unique local ecosystem; they seem to affect oceanic currents, resulting among other things in local concentration of plankton which in turn attracts species that graze on it, and indeed are probably a significant overall factor in biogeography of the oceans. They also may serve as way stations in the migration of whales and other pelagic species. Despite being poorly studied, they are heavily targeted by commercial fishing, including dredging. In addition they are of interest to potential seabed mining.
https://en.wikipedia.org/wiki?curid=22023966
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In 1937, the German Ministry of Aviation issued a specification for a short-range, three-seat reconnaissance aircraft with a good all-round view to support the German army in the field, replacing the Henschel Hs 126, which had just entered service. A power of about 850–900 hp (630–670 kW) was specified. The specification was issued to Arado and Focke-Wulf. Arado's design, the Ar 198, which was initially the preferred option, was a relatively conventional single-engined high-wing monoplane with a glazed gondola under the fuselage. Focke-Wulf's chief designer Kurt Tank's design, the Fw 189, was a twin-boom design, powered by two Argus As 410 engines instead of the expected single engine. As a "twin-boom" design like the earlier Dutch Fokker G.I, the Fw 189 used a central crew gondola for its crew accommodation, which for the Fw 189 would be designed with a heavily glazed and framed "stepless" cockpit forward section, which used no separate windscreen panels for the pilot (as with many German medium bombers from 1938 onwards). Blohm & Voss proposed as a private venture something even more radical: chief designer Dr. Richard Vogt's unique asymmetric BV 141. Orders were placed for three prototypes each of the Arado and Focke-Wulf designs, in April 1937.
https://en.wikipedia.org/wiki?curid=454903
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Developments in firearms accelerated during the 19th and 20th centuries. Breech-loading became more or less a universal standard for the reloading of most hand-held firearms and continues to be so with some notable exceptions (such as mortars). Instead of loading individual rounds into weapons, magazines holding multiple munitions were adopted—these aided rapid reloading. Automatic and semi-automatic firing mechanisms meant that a single soldier could fire many more rounds in a minute than a vintage weapon could fire over the course of a battle. Polymers and alloys in firearm construction made weaponry progressively lighter and thus easier to deploy. Ammunition changed over the centuries from simple metallic ball-shaped projectiles that rattled down the barrel to bullets and cartridges manufactured to high precision. Especially in the past century particular attention has focused on accuracy and sighting to make firearms altogether far more accurate than ever before. More than any single factor though, firearms have proliferated due to the advent of mass production—enabling arms-manufacturers to produce large quantities of weaponry to a consistent standard.
https://en.wikipedia.org/wiki?curid=11966
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Around the 1930s plant nutritionists investigated diseases of certain plants, and thereby, observed symptoms related to existing soil conditions such as salinity. In this context, water culture experiments were undertaken with the hope of delivering similar symptoms under controlled laboratory conditions. This approach forced by Dennis Robert Hoagland led to innovative model systems (e.g., green algae Nitella) and standardized nutrient recipes playing an increasingly important role in modern plant physiology. In 1929, William Frederick Gericke of the University of California at Berkeley began publicly promoting that the principles of solution culture be used for agricultural crop production. He first termed this cultivation method "aquiculture" created in analogy to "agriculture" but later found that the cognate term aquaculture was already applied to culture of aquatic organisms. Gericke created a sensation by growing tomato vines high in his back yard in mineral nutrient solutions rather than soil. He then introduced the term "Hydroponics", water culture, in 1937, proposed to him by , a phycologist with an extensive education in the classics. Hydroponics is derived from neologism υδρωπονικά (derived from Greek ύδωρ=water and πονέω=cultivate), constructed in analogy to γεωπονικά (derived from Greek γαία=earth and πονέω=cultivate), geoponica, that which concerns agriculture, replacing, γεω-, earth, with ὑδρο-, water.
https://en.wikipedia.org/wiki?curid=14133
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Typically, an MFL tool consists of two or more bodies. One body is the magnetizer with the magnets and sensors and the other bodies contain the electronics and batteries. The magnetizer body houses the sensors that are located between powerful "rare-earth" magnets. The magnets are mounted between the brushes and tool body to create a magnetic circuit along with the pipe wall. As the tool travels along the pipe, the sensors detect interruptions in the magnetic circuit. Interruptions are typically caused by metal loss and which in most cases is corrosion and the dimensions of the potential metal loss is denoted previously as "feature." Other features may be manufacturing defects and not actual corrosion. The feature indication or "reading" includes its length by width by depth as well as the o'clock position of the anomaly/feature. Mechanical damage such as shovel gouges can also be detected. The metal loss in a magnetic circuit is analogous to a rock in a stream. Magnetism needs metal to flow and in the absence of it, the flow of magnetism will go around, over or under to maintain its relative path from one magnet to another, similar to the flow of water around a rock in a stream. The sensors detect the changes in the magnetic field in the three directions (axial, radial, or circumferential) to characterize the anomaly. The sensors are typically oriented axially which limits data to axial conditions along the length of the pipeline. Other designs of smart pigs can address other directional data readings or have completely different functions than that of a standard MFL tool. Oftentimes an operator will run a series of inspection tools to help verify or confirm MFL readings and vice versa. An MFL tool can take sensor readings based on either the distance the tool travels or on increments of time. The choice depends on many factors such as the length of the run, the speed that the tool intends to travel, and the number of stops or outages that the tool may experience.
https://en.wikipedia.org/wiki?curid=3168401
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After completing her PhD, Dayhoff studied electrochemistry under Duncan A. MacInnes at the Rockefeller Institute from 1948 to 1951. In 1952, she moved to Maryland with her family and later received research fellowships from the University of Maryland (1957–1959), working on a model of chemical bonding with Ellis Lippincott. At Maryland, she gained her first exposure to a new high-speed computer, the IBM model 7094. After this ended, she joined the National Biomedical Research Foundation in 1960 as Associate Director (a position she held for 21 years). At the NBRF, she began to work with Robert Ledley, a dentist who had obtained a degree in physics and become interested in the possibilities of applying computational resources to biomedical problems. He had authored one of the earliest studies of biomedical computation, "Report on the Use of Computer in Biology and Medicine." With their combined expertise, they published a paper in 1962 entitled "COMPROTEIN: A computer program to aid primary protein structure determination" that described a "completed computer program for the IBM 7090" that aimed to convert peptide digests to protein chain data. They actually began this work in 1958, but were not able to start programming until late 1960.
https://en.wikipedia.org/wiki?curid=1645612
1,416,956
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Because of the improvements "Taq" polymerase provided in PCR DNA replication: higher specificity, fewer nonspecific products, and simpler processes and equipment, it has been instrumental in the efforts made to detect diseases. “The use of Polymerase Chain Reaction (PCR) in infectious disease diagnosis, has resulted in an ability to diagnose early and treat appropriately diseases due to fastidious pathogens, determine the antimicrobial susceptibility of slow growing organisms, and ascertain the quantum of infection.” The implementation of "Taq" polymerase has saved countless lives. It has served an essential role in the detection of many of the world’s worst diseases, including: tuberculosis, streptococcal pharyngitis, atypical pneumonia, AIDS, measles, hepatitis, and ulcerative urogenital infections. PCR, the method used to recreate copies of specific DNA samples, makes disease detection possible by targeting a specific DNA sequence of a targeted pathogen from a patient’s sample and amplifying trace amounts of the indicative sequences by copying them up to billions of times. Although this is the most accurate method of disease detection, especially for HIV, it is not performed as often as alternative, inferior tests because of the relatively high cost, labor, and time required.
https://en.wikipedia.org/wiki?curid=2193281
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"Podospora anserina" has a definite life span and shows senescence phenotypically (by slower growth, less aerial hyphae, and increased pigment production in distal hyphae). However, isolates show either increased life span or immortality. To study the process of aging many genetic manipulations to produce immortal strains or increase life-span have been done. In general, the mitochondrion and mitochondrial chromosome is investigated (note that animals, closely related to fungi, contain similar organelles like mitochondria). This is because during respiration reactive oxygen species are produced that limit the life span and over time defective mitochondrial DNA can accumulate. With this knowledge, much focus turned to nutrition availability, respiration (ATP synthesis) and oxidases, like cytochrome c oxidase. Carotenoids, pigments also found in plants and provide health benefits to humans, are known to be in fungi like "Podospora's" divergent ancestor "Neurospora crassa". In "N. crassa" (and other fungi) cartenoids "al" genes, namely focused provide UV radiation protection. Overexpressed of "al-2" "Podospora anserina" increased life span by 31%. Calorie restriction studies show that decreased nutrition, like sugar, increase life span (likely due to slower metabolism and thus decreased reactive oxygen species production or induced survival genes). Also, intracellular copper levels were found to be correlated with growth. This was studied in Grisea-deleted and ex1-deleted strains, as well as in a wild type s strain. "Podospora" without Grisea, a cooper transcription factor, had decreased intracellular copper levels which lead to use of an alternative respiratory pathway that consequently produced less oxidative stress.
https://en.wikipedia.org/wiki?curid=34481954
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Through a series of experiments, Wertheimer discovered that a person observing a pair of alternating bars of light can, under the right conditions, experience the illusion of movement between one location and the other. He noted that this was a perception of motion absent any moving object. That is, it was pure phenomenal motion. He dubbed it phi ("phenomenal") motion. Wertheimer's publication of these results in 1912 marks the beginning of Gestalt psychology. In comparison to von Ehrenfels and others who had used the term "gestalt" earlier in various ways, Wertheimer's unique contribution was to insist that the "gestalt" is perceptually primary. The gestalt defines the parts from which it is composed, rather than being a secondary quality that emerges from those parts. Wertheimer took the more radical position that "what is given me by the melody does not arise ... as a secondary process from the sum of the pieces as such. Instead, what takes place in each single part already depends upon what the whole is", (1925/1938). In other words, one hears the melody first and only then may perceptually divide it up into notes. Similarly, in vision, one sees the form of the circle first—it is given "im-mediately" (i.e., its apprehension is not mediated by a process of part-summation). Only after this primary apprehension might one notice that it is made up of lines or dots or stars.
https://en.wikipedia.org/wiki?curid=70402
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Karl Jansky made the discovery of the first astronomical radio source serendipitously in the early 1930s. As a newly hired radio engineer with Bell Telephone Laboratories, he was assigned the task to investigate static that might interfere with short wave transatlantic voice transmissions. Using a large directional antenna, Jansky noticed that his analog pen-and-paper recording system kept recording a persistent repeating signal or "hiss" of unknown origin. Since the signal peaked about every 24 hours, Jansky first suspected the source of the interference was the Sun crossing the view of his directional antenna. Continued analysis, however, showed that the source was not following the 24-hour daily cycle of the Sun exactly, but instead repeating on a cycle of 23 hours and 56 minutes. Jansky discussed the puzzling phenomena with his friend, astrophysicist Albert Melvin Skellett, who pointed out that the observed time between the signal peaks was the exact length of a sidereal day; the time it took for "fixed" astronomical objects, such as a star, to pass in front of the antenna every time the Earth rotated. By comparing his observations with optical astronomical maps, Jansky eventually concluded that the radiation source peaked when his antenna was aimed at the densest part of the Milky Way in the constellation of Sagittarius.
https://en.wikipedia.org/wiki?curid=82961
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"S. oneidensis" MR-1 can change the oxidation state of metals. These microbial processes allow exploration of novel applications, for example, the biosynthesis of metal nanomaterials. In contrast to chemical and physical methods, microbial processes for synthesizing nanomaterials can be achieved in aqueous phase under gentle and environmentally benign conditions. Many organisms can be utilized to synthesize metal nanomaterials. "S. oneidensis" is able to reduce a diverse range of metal ions extracellularly and this extracellular production greatly facilitates the extraction of nanomaterials. The extracellular electron transport chains responsible for transferring electrons across cell membranes are relatively well characterized, in particular outer membrane c-type cytochromes MtrC and OmcA. A 2013 study suggested that it is possible to alter particle size and activity of extracellular biogenic nanoparticles via controlled expression of the genes encoding surface proteins. An important example is the synthesis of silver nanoparticle by "S. oneidensis", where its antibacterial activity can be influenced by the expression of outer membrane c-type cytochromes. Silver nanoparticles are considered to be a new generation of antimicrobial as they exhibit biocidal activity towards a broad range of bacteria, and are gaining importance with the increasing resistance in antibiotics by pathogenic bacteria. "Shewanella" has been seen in laboratory settings to bioreduce a substantial amount of palladium and dechlorinate near 70% of polychlorinated biphenyls The production of nanoparticles by "S. oneidensis" MR-1 are closely associated to the MTR pathway (e.g. silver nanoparticles), or the hydrogenase pathway (e.g. palladium nanoparticles).
https://en.wikipedia.org/wiki?curid=16297790
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The recent history of transition suggested that weak political institutions and entrenched interest groups had hindered economic reform. The EBRD's "Transition Report 2013" looked at the relationship between transition and democratization. The report acknowledged that the academic literature was divided on whether economic development fostered democracy but argued that there was nonetheless strong empirical support for the hypothesis. It suggested that countries with high inequality were less inclined to support a limited and accountable state. In general, the proportion of the population with an income of between US$10–50 a day (the so-called "middle class") correlated with the level of democracy; however this correlation disappeared in transition countries with high income inequality. Those countries with large natural resource endowments, for example oil and gas producers like Russia and Kazakhstan, had less accountable governments and faced less electoral pressure to tackle powerful vested interests because the government could rely on resource rents and did not have to tax the population heavily. Countries with a strong institutional environment – that is, effective rule of law, secure property rights and uncorrupted public administration and corporate governance – were better placed to attract investment and undertake restructuring and regulatory change.
https://en.wikipedia.org/wiki?curid=1489819
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Major General Henry H. "Hap" Arnold became aware of the UK's jet program when he attended a taxiing demonstration of the Gloster E.28/39 in April 1941. The subject had been mentioned, but not in-depth, as part of the Tizard Mission the previous year. He requested and was given, the plans for the aircraft's powerplant, the Power Jets W.1, which he took back to the U.S. He also arranged for an example of the engine, the Whittle W.1X turbojet, to be flown to the U.S. on 1 October in a Consolidated B-24 Liberator, along with drawings for the more powerful W.2B/23 engine and a small team of Power Jets engineers. On 4 September, he offered the U.S. company General Electric a contract to produce an American version of the engine, which subsequently became the General Electric I-A. On the following day, he approached Lawrence Dale Bell, head of Bell Aircraft Corporation, to build a fighter to utilize it. Bell agreed and set to work on producing three prototypes. As a disinformation tactic, the USAAF gave the project the designation P-59A, to suggest it was a development of the unrelated Bell XP-59 fighter project which had been canceled. The design was finalized on 9 January 1942, and construction began. In March, long before the prototypes were completed, an order for 13 YP-59A pre-production aircraft was added to the contract.
https://en.wikipedia.org/wiki?curid=364859
948,778
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Neurogenetics is a field that is rapidly expanding and growing. The current areas of research are very diverse in their focuses. One area deals with molecular processes and the function of certain proteins, often in conjunction with cell signaling and neurotransmitter release, cell development and repair, or neuronal plasticity. Behavioral and cognitive areas of research continue to expand in an effort to pinpoint contributing genetic factors. As a result of the expanding neurogenetics field a better understanding of specific neurological disorders and phenotypes has arisen with direct correlation to genetic mutations. With severe disorders such as epilepsy, brain malformations, or mental retardation a single gene or causative condition has been identified 60% of the time; however, the milder the intellectual handicap the lower chance a specific genetic cause has been pinpointed. Autism for example is only linked to a specific, mutated gene about 15–20% of the time while the mildest forms of mental handicaps are only being accounted for genetically less than 5% of the time. Research in neurogenetics has yielded some promising results, though, in that mutations at specific gene loci have been linked to harmful phenotypes and their resulting disorders. For instance a frameshift mutation or a missense mutation at the "DCX" gene location causes a neuronal migration defect also known as lissencephaly. Another example is the "ROBO3" gene where a mutation alters axon length negatively impacting neuronal connections. Horizontal gaze palsy with progressive scoliosis (HGPPS) accompanies a mutation here. These are just a few examples of what current research in the field of neurogenetics has achieved.
https://en.wikipedia.org/wiki?curid=18143331
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Among different histologic subtypes of RCC, PRCC is the second most predominant type and accounts for 10-15% of all renal tumors. In the case of the United States, it is estimated that the incidence of PRCC will rise to 3,500 to 5,000 cases annually. Generally, PRCC is more prevalent among men than women, while the reported sex ratio (M: F) varies from 1.8:1 to 3.8:1. The mean age at presentation is identified as 52–66 years old; however, no statistically significant difference was found in the incidence of PRCC between the younger (< 40 years) and older adult groups (>40 years). In terms of racial variation, several studies have proven that people with African or Afro-Caribbean ancestry tend to have higher chances of being diagnosed with PRCC. According to the National Cancer Database, PRCC was more common in the Non-Hispanic Black population (38.9%) when compared to other races – Asian American (18.0%), Non-Hispanic White (13.2%), and Hispanic White populations (6.1%).
https://en.wikipedia.org/wiki?curid=63591324
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Ceramography evolved along with other branches of materialography and ceramic engineering. Alois de Widmanstätten of Austria etched a meteorite in 1808 to reveal proeutectoid ferrite bands that grew on prior austenite grain boundaries. Geologist Henry Clifton Sorby, the "father of metallography," applied petrographic techniques to the steel industry in the 1860s in Sheffield, England. French geologist Auguste Michel-Lévy devised a chart that correlated the optical properties of minerals to their transmitted color and thickness in the 1880s. Swedish metallurgist J.A. Brinell invented the first quantitative hardness scale in 1900. Smith and Sandland developed the first microindention hardness test at Vickers Ltd. in London in 1922. Swiss-born microscopist A.I. Buehler started the first metallographic equipment manufacturer near Chicago in 1936. Frederick Knoop and colleagues at the National Bureau of Standards developed a less-penetrating (than Vickers) microindention test in 1939. Struers A/S of Copenhagen introduced the electrolytic polisher to metallography in 1943. George Kehl of Columbia University wrote a book that was considered the bible of materialography until the 1980s. Kehl co-founded a group within the Atomic Energy Commission that became the International Metallographic Society in 1967.
https://en.wikipedia.org/wiki?curid=14695652
1,490,009
1,833,670
Property records date back to 1732 when Thomas Fuller owned the tract on land then known as the Natick Plain. The property earned the sobriquet Elm Bank after Colonel John Jones acquired the land in 1740 and planted elm trees along the riverside. After being occupied by families named Loring, Broad, and Otis, the property was sold for $10,000 in 1874 to Benjamin Pierce Cheney, a founder of a delivery company that became American Express. At the time of Cheney's death in 1895, the property contained over 200 acres (80 hectares), and passed to his eldest daughter Alice in 1905. In 1907, Alice and her husband, Dr. William Hewson Baltzell, engaged the architectural firm of Carrère and Hastings to design a Neo-Georgian manor house. They also commissioned the Olmsted Brothers firm, the most prominent landscape designers of the era, for the estate's site planning and to design new gardens and improve existing ones. In the 1940s, the property became a seminary housing a group of Stigmatine Fathers, who constructed a school building and ran a summer camp in the 1960s and 1970s. The Commonwealth of Massachusetts purchased the property in the mid 1970s. It then served as the home of the Quinobin Regional Technical School.
https://en.wikipedia.org/wiki?curid=1702906
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Dr. Robbins left the Public Health Service and joined Methodist Hospital in Indianapolis where, working with Jack Hall, MD, he developed the first set of health hazard tables. This culminated in the publication of "How to Practice Prospective Medicine" in 1970 – a guide for practising physicians, which outlined the health risk assessment questionnaire, risk computations and patient feedback strategies. During the 1960s, some researchers in California formed the Human Population Laboratory (HPL) to investigate factors contributing to quality of life. Inspired by a research article reporting on the HPL's Alameda County Study on the best lifestyle practices for good health, Don R. Hall, DrPH, developed a Health Age Assessment algorithm on a calculator while a masters student at Loma Linda University in 1972. In 1977, Hall coded his longevity calculations on a TRS-80, creating the first computerized health risk assessment. Within a year, he had programmed 12 health assessments on single topics such as nutrition, fitness, weight, and stress. In 1979, when personal desktop computers became readily available, he packaged all 12 assessments together on a floppy disk and marketed it as a comprehensive health risk assessment. It wasn't until 1980, when the Centers for Disease Control and Prevention released a publicly available version, that the HRA became widely used, particularly in workplace settings.
https://en.wikipedia.org/wiki?curid=15588392
1,250,025
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For its predecessor I-SPY 1, 10 cancer centers and the National Cancer Institute (NCI SPORE program and the NCI Cooperative groups) collaborated to identify response indicators that would best predict survival for women with high-risk breast cancer. During 2002–2006, the study monitored 237 patients undergoing neoadjuvant therapy before surgery. Iterative MRI and tissue samples monitored the biology of patients to chemotherapy given in a neoadjuvant setting, or presurgical setting. Evaluating chemotherapy's direct impact on tumor tissue took much less time than monitoring outcomes in thousands of patients over long time periods. The approach helped to standardize the imaging and tumor sampling processes, and led to miniaturized assays. Key findings included that tumor response was a good predictor of patient survival, and that tumor shrinkage during treatment was a good predictor of long-term outcome. Importantly, the vast majority of tumors identified as high risk by molecular signature. However, heterogeneity within this group of women and measuring response within tumor subtypes was more informative than viewing the group as a whole. Within genetic signatures, level of response to treatment appears to be a reasonable predictor of outcome. Additionally, its shared database has furthered the understanding of drug response and generated new targets and agents for subsequent testing.
https://en.wikipedia.org/wiki?curid=65297106
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The Taung Child was originally thought to have been about six years old at death because of the presence of deciduous teeth, but it is now believed to have been about three or four, based on studies of rates of enamel deposition on the teeth. There was some debate over the age of this creature initially because it was unclear if it grew at the speed of a human, or of an ape. Compared to an ape, it would have been aged about 4 years, and compared to a human, it would have been aged around 5–7 years old. Comparison of the Taung Child fossil to the skull of a nine-year-old modern child suggest that "A. africanus" had a growth rate to adolescence more similar to that of modern apes, like chimpanzees (genus "Pan"), than to that of modern "Homo sapiens". The creature stood tall and weighed between . It had a cranial capacity of 400–500 cc, which is comparable to that of a modern adult chimpanzee. Because mature brain size is attained within the first few years of life, the relatively small size is unlikely be attributed to the specimen being a juvenile. The skull also possesses features more commonly found in humans than apes, including a rising forehead and round eye sockets. Although the lower portion of the nose resembled a chimpanzee, the overall shorter shape was human-like. Likewise the lower portion of the face was protruded albeit to a lesser degree than in modern apes. A bony shelf found within the inner jaw of apes could not be found. Dart opted to describe the remains as a "man-ape" rather than as an "ape-man" to highlight the more human features present compared to the remains found of the more recent Pithecanthropus erectus.
https://en.wikipedia.org/wiki?curid=1767352
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Northwestern's professional schools had been founded or affiliated with the university at various times in its history and consequently their facilities were scattered throughout Chicago. In connection with a 1917 master plan for a central Chicago campus and President Scott's capital campaign, of land were purchased at the Corner of Chicago Avenue and Lake Shore Drive for $1.5 million in 1920. George McKinlock donated $250,000 to have the campus named in honor of his son, Alexander McKinlock Jr. who died in World War I, but his financial losses during the Great Depression prevented him from fulfilling his pledge, so the university forgave his debt and the name defaulted to the Chicago campus instead. James Gamble Rogers was given a commission to create a master plan for the major buildings on the new campus which he designed in a collegiate gothic style. In 1923, Mrs. Montgomery Ward donated $8 million to the campaign to fund the construction of the Montgomery Ward Memorial Building to house the medical and dental schools and create endowments for faculty chairs, research grants, scholarships, and building maintenance. The building would become the first skyscraper housing academic facilities in the United States. In addition to the Ward Building, Rogers designed Wieboldt Hall to house facilities for the School of Commerce and Levy Mayer Hall to house the School of Law. The new campus comprising these three new buildings were dedicated during a two-day-long ceremony in June 1927. The Chicago campus continued to expand with the addition of Thorn Hall in 1931 and Abbott Hall in 1939.
https://en.wikipedia.org/wiki?curid=10414221
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A hypothesis of "Albertosaurus" life history postulates that hatchlings died in large numbers, but have not been preserved in the fossil record due to their small size and fragile construction. After just two years, juveniles were larger than any other predator in the region aside from adult "Albertosaurus", and more fleet of foot than most of their prey animals. This resulted in a dramatic decrease in their mortality rate and a corresponding rarity of fossil remains. Mortality rates doubled at age twelve, perhaps the result of the physiological demands of the rapid growth phase, and then doubled again with the onset of sexual maturity between the ages of fourteen and sixteen. This elevated mortality rate continued throughout adulthood, perhaps due to the high physiological demands of procreation, including stress and injuries received during intraspecific competition for mates and resources, and eventually, the ever-increasing effects of senescence. The higher mortality rate in adults may explain their more common preservation. Very large animals were rare because few individuals survived long enough to attain such sizes. High infant mortality rates, followed by reduced mortality among juveniles and a sudden increase in mortality after sexual maturity, with very few animals reaching maximum size, is a pattern observed in many modern large mammals, including elephants, African buffalo, and rhinoceros. The same pattern is also seen in other tyrannosaurids. The comparison with modern animals and other tyrannosaurids lends support to this life history hypothesis, but bias in the fossil record may still play a large role, especially since more than two-thirds of all "Albertosaurus" specimens are known from one locality. "Albertosaurus" and "Gorgosaurus" individuals both grow the most rapidly during a four-year period until they are approximately 16.
https://en.wikipedia.org/wiki?curid=10040475
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In order for the substrate adapter unit Cdc4 to bind to Sic1, a minimum of any six of the nine cyclin-dependent kinase sites on Sic1 have to be phosphorylated. In other words: There is a threshold number of phosphorylation sites in order to achieve receptor-ligand binding. As recently stated, this "suggests that the ultrasensitivity in the Sic1-Cdc4 system may be driven at least in part by cumulative electrostatic interactions". In general, an ultrasensitive enzyme requires less than 81-fold increase in stimulus to drive it from 10% to 90% activity. "Ultrasensitivity" highlights that the upstroke of the stimulus/response curve is steeper than the one that is obtained for a hyperbolic Michaelis-Menten enzyme. Thus, ultrasensitivity allows a highly sensitive response: A graded input can be transformed into a sharply thresholded output. The development of B-type cyclin–cyclin-dependent kinase activity, as well as the onset of DNA replication, requires degradation of Sic1 in the late G1 phase of the cell cycle. The WD domain of Cdc4 binds to the phosphorylated form of Sic1. Each bond to a Sic1-Phosphate is weak, but together the binding is strong enough to enable Sic1-degradation via the pathway described before. Hence, in this case ultrasensitivity allows precise definition ("fine tuning") of the time point in which destruction of Sic1 occurs, leading to initiation of the next step in the cell cycle (-> DNA replication).
https://en.wikipedia.org/wiki?curid=26625162
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Ultra-short-baseline (USBL) systems and the related super-short-baseline (SSBL) systems rely on a small (ex. 230 mm across), tightly integrated transducer array that is typically mounted on the bottom end of a strong, rigid transducer pole which is installed either on the side or in some cases on the bottom of a surface vessel. Unlike LBL and SBL systems, which determine position by measuring multiple distances, the USBL transducer array is used to measure the target "distance" from the transducer pole by using signal run time, and the target "direction" by measuring the phase shift of the reply signal as seen by the individual elements of the transducer array. The combination of distance and direction fixes the position of the tracked target relative to the surface vessel. Additional sensors including GPS, a gyro or electronic compass and a vertical reference unit are then used to compensate for the changing position and orientation (pitch, roll, bearing) of the surface vessel and its transducer pole. USBL systems offer the advantage of not requiring a sea floor transponder array. The disadvantage is that positioning accuracy and robustness is not as good as for LBL systems. The reason is that the fixed angle resolved by a USBL system translates to a larger position error at greater distance. Also, the multiple sensors needed for the USBL transducer pole position and orientation compensation each introduce additional errors. Finally, the non-uniformity of the underwater acoustic environment cause signal refractions and reflections that have a greater impact on USBL positioning than is the case for the LBL geometry.
https://en.wikipedia.org/wiki?curid=21898118
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Aristotle opposed the utopian style of theorizing, deciding to rely on the understood and observed behaviors of people in reality to formulate his theories. Stemming from an underlying moral assumption that life is valuable, the philosopher makes a point that scarce resources ought to be responsibly allocated to reduce poverty and death. This 'fear of goods' led Aristotle to exclusively support 'natural' trades in which personal satiation was kept at natural limit of consumption. 'Unnatural' trade, as opposed to the intended limit, was classified as the acquisition of wealth to attain more wealth instead of to purchase more goods. Cutting more along the grain of reality, Aristotle did not only set his mind on how to give people direction to make the right choices but wanted each person equipped with the tools to perform this moral duty. In his own words, "Property should be in a certain sense common, but, as a general rule, private; for, when everyone has a distinct interest, men will not complain of one another, and they will make more progress because everyone will be attending to his own business... And further, there is the greatest pleasure in doing a kindness or service to friends or guests or companions, which can only be rendered when a man has private property. These advantages are lost by excessive unification of the state.”
https://en.wikipedia.org/wiki?curid=171171
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When designing the game from an artistic viewpoint, the team took various pieces of work as inspiration. Robert Polidori's photographs of Lower Ninth Ward following Hurricane Katrina were used as a reference point when designing the flooded areas of Pittsburgh. "[Polidori] did these amazingly beautiful, horrific photos... it's not just decay and rot and post-apocalyptic grey, it's a human world that we're playing with when we portray this destruction," said Straley. The concept of post-apocalyptic environments was considered a "starting point" for the artists. The art team also strived to achieve realism within every piece of art. Straley explained that the artists "would be like, I'm going to make this the most awesome fucking wall ever," in terms of creating attractive environments. The art department were forced to fight for things that they wished to include, due to the high demand during development. Ultimately, the team settled on a balance between simplicity and detail; while Straley and Druckmann preferred the former, the art team preferred the latter. The artistic composition of the game's locations was also a feature strongly focused on, in order to evoke varying emotions from players. In the final weeks of development, roles from the art department were undertaken by other members of the team; for example, Straley hand-arranged the texts on the game's training screens, a task that lead artist Nate Wells found unusual. "I have never even heard of a game director doing that! That's like... an intern task," Wells said.
https://en.wikipedia.org/wiki?curid=45204814
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The U.S. Army began seeking a guided mortar in response to fighting conditions experienced during the War in Afghanistan. Taliban fighters often engaged troops in small unit actions from prepared fighting positions on ridgelines and high ground. These types of ambushes offered limited exposure targets to direct fire weapons, and close air support was limited from rules of engagement and bad weather. Troops also spotted Taliban movements along distant ridgelines or valleys but didn't have the range with direct fire weapons to engage them. Because of this, the Army started the Accelerated Precision Mortar Initiative (APMI) from an urgent operational needs statement in February 2009 to create a GPS-guided 120 mm mortar with accuracy of CEP at ; because APMI was an urgent request, it was accelerated by an Other Transaction Authority rather the traditional acquisition process. GPS was chosen over laser designation as the guidance system because the enemy frequently ducked down behind ridges and rock outcroppings, so laser designation would have limited ability to target them, while a GPS round could give accurate targeting even when taking cover behind obstacles. In April 2010, the Army announced that ATK had won a competitive shoot-off during the winter against competitors Raytheon and General Dynamics, and been selected to provide a new precision-guided mortar under the APMI needs statement.
https://en.wikipedia.org/wiki?curid=6805466
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Early practitioners of IORT treated primarily abdominal malignancies using superficial X-rays (75–125 kV) and later orthovoltage x-rays (up to 300 kV in energy) prior to the advent of technology that enabled high-energy electrons. For the first 75 years, X-ray IORT was used mostly for palliation, but there were a few anecdotal reports of long-term survivors. In the early 1980s, when the use of electron IORT was increasing and showed promising results for certain indications, a handful of hospitals installed othovoltage units in lightly shielded ORs to see if this lower cost approach could achieve comparable results to that of electron IORT. This approach was less costly than building a shielded OR for an electron IORT unit and eliminated the logistics involved with patient transportation. However, it had a number of problems that limited its appeal. X-ray IORT has a poor uniformity of dose as a function of depth of penetration, the radiation does not stop at a pre-defined depth but continues to deposit radiation to underlying structures, and can do damage to boney structures if too high a dose is delivered. Despite its long use (since the 1930s), fewer than 1000 patients have been treated with this approach, and it is no longer offered at most centers.
https://en.wikipedia.org/wiki?curid=11146999
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Health technology assessment (HTA) is a multidisciplinary process that uses systematic and explicit methods to evaluate the properties and effects of a health technology. Health technology is conceived as any intervention (test, device, medicine, vaccine, procedure, program) at any point in its lifecycle (pre-market, regulatory approval, post-market, disinvestment). HTA aim is to inform "decision-making in order to promote an equitable, efficient, and high-quality health system""."" " It has other definitions including "a method of evidence synthesis that considers evidence regarding clinical effectiveness, safety, cost-effectiveness and, when broadly applied, includes social, ethical, and legal aspects of the use of health technologies. The precise balance of these inputs depends on the purpose of each individual HTA. A major use of HTAs is in informing reimbursement and coverage decisions by insurers and national health systems, in which case HTAs should include benefit-harm assessment and economic evaluation." And "a multidisciplinary process that summarises information about the medical, social, economic and ethical issues related to the use of a health technology in a systematic, transparent, unbiased, robust manner. Its aim is to inform the formulation of safe, effective, health policies that are patient focused and seek to achieve best value. Despite its policy goals, HTA must always be firmly rooted in research and the scientific method".
https://en.wikipedia.org/wiki?curid=22406877
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Land-based systems were used because there were severe technical problems operating on ships, mainly due to the effects of the superstructure on the wavefront of arriving radio signals. However, these problems were overcome under the technical leadership of the Polish engineer Wacław Struszyński, working at the Admiralty Signal Establishment. As ships were equipped, a complex measurement series was carried out to determine these effects, and cards were supplied to the operators to show the required corrections at various frequencies. By 1942, the availability of cathode ray tubes improved and was no longer a limit on the number of huff-duff sets that could be produced. At the same time, improved sets were introduced that included continuously motor-driven tuning, to scan the likely frequencies and sound an automatic alarm when any transmissions were detected. Operators could then rapidly fine-tune the signal before it disappeared. These sets were installed on convoy escorts, enabling them to get fixes on U-boats transmitting from over the horizon, beyond the range of radar. This allowed hunter-killer ships and aircraft to be dispatched at high speed in the direction of the U-boat, which could be located by radar if still on the surface or ASDIC if submerged.
https://en.wikipedia.org/wiki?curid=1453216
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The highest oxidation states may be uncommon to everyday life, or even industrial usage. For example, the synthesis of mercury tetrafluoride, the first compound to achieve an oxidation state above +2 for a group 12 element, breaking the filled 5d-shell, again showing the significance of the relativistic effects on the heavy elements, and fueling the debate over whether mercury, cadmium, and zinc are transition metals, occurred at cryogenic temperatures and the compound decomposes at the temperatures of solid nitrogen. More unstable still, a rare cobalt(V) species, the cation, has only been observed in gas phase (with no interactions with other atoms, thus no shown stability in any chemical environment). The reason why such unstable species exist is complicated, yet can be summarized as follows on the example of the hypothesized molecule: According to the modern calculations, five fluorine atoms and one nitrogen atoms can theoretically arrange themselves in different ways, such as and , and , , etc. The + system is of the smallest energy (most stable). However, if a molecule was synthesized, it would have to go through a high-energy transitional state, from which it could decay into two molecules. But since the transitional state is higher in energy than the hexatomic molecule, the energy difference would need to be added to reach the transitional state and thus allow the decay. This energy is called reaction activation barrier. (The second decay mode has an analogical position.) Thus if little energy was added (low temperatures), then the compound could exist; however, the synthesis is a serious problem (not yet solved).
https://en.wikipedia.org/wiki?curid=39292926
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Two days after exposure, on December 4, patient 2-MG visited a local doctor but did not mention the mysterious heating source, and the doctor assumed he was drunk. The resulting treatment however did clear up the symptoms. On December 15, patient 1-DN and 2-MG developed burning and itching on the small of their backs, where the radiation source had been closest. Patient 1-DN lost his voice as well, but did not seek care at that time. The wife of patient 3-MB and the brother of patient 2-MG learned that all three men were ill with similar symptoms, including increasing desquamation, especially on their backs. The wife and brother reached out to the police, who suggested that all three men seek medical attention. All three patients were finally hospitalized on December 22, and it was determined they had ARS. Patient 3-MB was released on January 23, 2002, as his injury was mild. The other patients remained in serious condition, and the Government of Georgia petitioned the IAEA for help treating them. The IAEA intervened: patient 1-DN was sent to Burnasyan Federal Medical Biophysical Center in Moscow, and Patient 2-MG was sent to the Percy military hospital in Paris. Patient 2-MG was hospitalized for over a year, and required extensive skin grafts, but survived and was discharged on March 18, 2003. Patient 1-DN's injuries lingered. He had received the greatest exposure on his back, as well as damage to his heart and vital organs. A large radiation ulcer formed on much of his upper left back. Despite intensive care, repeated antibiotics, multiple surgeries, and an attempted skin graft, the wound did not heal. His condition was complicated by tuberculosis, which prevented effective treatment of lung injury. Past drug use had also weakened his health. He developed sepsis, and died of heart failure on May 13, 2004, 893 days after first exposure.
https://en.wikipedia.org/wiki?curid=67844064
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A multitude of reasons contributed to the ultimate cancellation of the RAH-66 program. According to aviation author James Williams, efforts to speed up the program via the elimination of risk-mitigation measures and the stream of continuous adjustments to account for annual budget cuts to the rotorcraft resulted in the formation of a negative cycle that functioned to greatly extend the rotorcraft's development schedule. Over the course of the Comanche's development, multiple government agencies had acted to cut the number of helicopters that were intended to be ordered; one particularly common basis for such curtailments was that the Cold War had ended and thus such quantities were unnecessary (a phenomenon known as the "Peace Dividend"). However, significant reductions in volume directly resulted in the rapid climbs in the projections of the Comanche's unit cost; in turn, this stimulated and gave validity to critics of the program, such as the Army Acquisition Executive James Ambrose, who had prominently declared that the Army would not receive any aircraft "costing a dollar over $7.5 million".
https://en.wikipedia.org/wiki?curid=396698
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An endoscope is an inspection instrument composed of image sensor, optical lens, light source and mechanical device, which is used to look deep into the body by way of openings such as the mouth or anus. A typical endoscope applies several modern technologies including optics, ergonomics, precision mechanics, electronics, and software engineering. With an endoscope, it is possible to observe lesions that cannot be detected by X-ray, making it useful in medical diagnosis. Endoscopes use tubes which are only a few millimeters thick to transfer illumination in one direction and high-resolution images in real time in the other direction, resulting in minimally invasive surgeries. It is used to examine the internal organs like the throat or esophagus. Specialized instruments are named after their target organ. Examples include the cystoscope (bladder), nephroscope (kidney), bronchoscope (bronchus), arthroscope (joints) and colonoscope (colon), and laparoscope (abdomen or pelvis). They can be used to examine visually and diagnose, or assist in surgery such as an arthroscopy.
https://en.wikipedia.org/wiki?curid=421149
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International regulators of precursor chemicals consider it necessary to recognise and protect the legal trade of these chemicals, while at the same time preventing their diversion from such trade for use in the illegal manufacture of narcotic drugs and psychoactive substances. For example, phenylacetic acid is used legally in the production of penicillin, flavourings, perfume, and cleaning solutions, but it can also be used in the illegal manufacture of amphetamines and methamphetamine. The international framework for precursor control is set out under Articles 12 and 13 of the 1988 United Nations Convention against Illicit Traffic in Narcotic Drugs and Psychotropic Substances, requiring UN member states to establish and enforce regulatory systems that monitor the trade in their country, as well as movement of precursor chemicals into and out of their country (e.g. transshipment). Monitoring is carried out through measures including the licensing and registration of operators, procedures and requirements governing movement of chemicals, as well as documentation, record keeping and labelling requirements. The International Narcotics Control Board has also established tools including the Pre-Export Notification Online (PEN-Online) and Precursors Incident Communication (PICS) systems, in addition to annual information reporting through 'Form D' and the International Special Surveillance List (ISSL) for non-controlled and designer chemicals which can be used as precursors themselves for certain illicit drugs or pre-precursors, to support UN Member States in their domestic regulatory efforts and cross-border coordination. There is also harmonised legislation across Europe which puts a control system in place with the aim to achieve a balance between precursor diversion prevention without inhibiting legal trade.
https://en.wikipedia.org/wiki?curid=36201623
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Volumes of the "Éléments" have appeared periodically since the publication of the first "Fascicule" ("Installment") in 1939 by Éditions Hermann, with several being published during the 1950s and 1960s, Bourbaki's most productive period and time of greatest influence. Several years have sometimes passed before the publication of a new volume, and various factors have contributed to a slow pace of publication. The group's working style is slow and rigorous, and a final product is not deemed acceptable unless it is unanimously approved by the group. Further, World War II interrupted Bourbaki's activities during its early years. In the 1970s a legal dispute arose with Hermann, the group's original publisher, concerning copyright and royalty payments. The Bourbaki group won the involved lawsuit, retaining copyright over the work authored under the pseudonym, but at a price: the legal battle had dominated the group's attention during the 1970s, preventing them from doing productive mathematical work under the Bourbaki name. Following the lawsuit and during the 1980s, publication of new volumes was resumed via Éditions Masson. From the 1980s through the 2000s Bourbaki published very infrequently, with the result that in 1998 "Le Monde" pronounced the collective "dead". However, in the 2010s Bourbaki resumed publication of the "Éléments" with a revised and expanded edition of the eighth chapter of "Algebra" and a new book on algebraic topology, which had originally been planned as the eleventh chapter of the group's book on general topology. Springer Verlag became Bourbaki's current publisher during the 21st century, reprinting the "Éléments" while also publishing new volumes. Some early versions of the "Éléments" can be viewed at an online archive, and the mathematical historian Liliane Beaulieu has documented the sequence of publication.
https://en.wikipedia.org/wiki?curid=38333812
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The painting was shown in England and Scotland in the summer of 1857. After a showing in London, a chromolithograph was made by Day & Son in June, followed by more exhibitions in Glasgow, Manchester, and Liverpool. London's "Art-Journal" wrote, "No work of its class has ever been more successful: it is truth, obviously and certainly. Considered as a painting, it is a production of rare merit: while admirable as a whole, its parts have been carefully considered and studied; broadly and effectively wrought, yet elaborately finished." Famed art critic John Ruskin was impressed, as reported by Church's friend Bayard Taylor: "The exhibitor told me that Ruskin had just been to see it, and that he had found effects in it which he had been waiting for years to find." Ruskin was said to have marvelled at the rainbow, believing at first that the play of light through a window was projected onto the canvas. In September 1858 "Niagara" returned to the United States, where, after another New York showing, it travelled to Washington, D.C., Baltimore, Richmond, and New Orleans. "Cosmopolitan Art Journal" wrote, "The reputation of this work has greatly increased by its English tour. It is now regarded as the finest painting ever executed by any American artist." Another exhibition in New York followed. "Niagara" was exhibited at the 1867 Exposition Universelle in Paris, where it won a silver medal and improved the European view of American art. "Harper's Weekly" wrote, "The European critics declared that the 'Niagara' gave them an entirely new and higher view both of American nature and art.
https://en.wikipedia.org/wiki?curid=58333976
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Pasley arrived at Melbourne on 18 September 1853, having been appointed in the spring of that year Colonial Engineer to the Colony of Victoria. He found himself at the head of a considerable department, to which that of Colonial Architect was very soon added, and subsequently that of Central Road Board. In 1854 he was member of a commission to make arrangements for an exhibition of colonial products at the Paris Exhibition in the following year. In October 1854 he was nominated to a seat on the Victorian Legislative Council. About this time the Ballarat riots broke out, and he offered his services to the Governor, Sir Charles Hotham, and was sent to the goldfields on a special mission. In 1855 the new constitution came into force in Victoria, and the first responsible ministry was formed by William Haines in November 1855, General Pasley taking the portfolio of Commissioner of Public Works. On 10 December he was appointed a member of the Executive Council, and a few months later was made by an Act of Council a joint trustee with Captain (later Lieut.-General Sir) Andrew Clarke, RE, for the Melbourne and Mount Alexander Railway, purchased by Government. In 1856 Captain Pasley was elected to the first Victorian Legislative Assembly for South Bourke, and in March 1857 he resigned with the rest of the Ministry, but ultimately consented to remain as professional head of the Department of Public Works.
https://en.wikipedia.org/wiki?curid=39798917
1,888,426
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When genes from one organism are expressed in another organism the resulting protein sometimes forms inclusion bodies. This is often true when large evolutionary distances are crossed: a cDNA isolated from Eukarya for example, and expressed as a recombinant gene in a prokaryote risks the formation of the inactive aggregates of protein known as inclusion bodies. While the cDNA may properly code for a translatable mRNA, the protein that results will emerge in a foreign microenvironment. This often has fatal effects, especially if the intent of cloning is to produce a biologically active protein. For example, eukaryotic systems for carbohydrate modification and membrane transport are not found in prokaryotes. The internal microenvironment of a prokaryotic cell (pH, osmolarity) may differ from that of the original source of the gene. Mechanisms for folding a protein may also be absent, and hydrophobic residues that normally would remain buried may be exposed and available for interaction with similar exposed sites on other ectopic proteins. Processing systems for the cleavage and removal of internal peptides would also be absent in bacteria. The initial attempts to clone insulin in a bacterium suffered all of these deficits. In addition, the fine controls that may keep the concentration of a protein low will also be missing in a prokaryotic cell, and overexpression can result in filling a cell with ectopic protein that, even if it were properly folded, would precipitate by saturating its environment.
https://en.wikipedia.org/wiki?curid=2381640
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The origins of RPI men's lacrosse began in the 1930s, when the school had a club team; not much else is known about the team when it was a student run club. In 1942, Ned Harkness began coaching the team after the institution recognized it as a varsity sport. Coach Harkness was working part-time as coach and full-time at a local job in Troy, New York. After one season, Harkness was drafted into the Canadian Air Force, leaving the team until his return in 1945. By this point the 13 man roster had significantly grown, and the team began to compete at the highest level with schools around the country such as Dartmouth, Princeton, West Point, Stevens, Yale, and Williams. The 1948 men's lacrosse team represented the United States in the 1948 Olympics in London. This team was undefeated in the United States that year with a record of 11–0, winning the national championship. The team continued this streak into London to beat several English teams while also playing to a 5–5 tie with the British all star team, winning 7 of the 8 games played, with one tie and no losses. The Olympic Sports committee does not list lacrosse as an official event, so these games were considered exhibition matches. Despite this, the RPI lacrosse team received gold medals from the summer games. This 1948 men's team showed such dedication that, when during a trip on a dilapidated bus to an away game the bus broke down, the team proceeded to push the bus for "miles" before the a towing company arrived to tow the team and the bus the rest of the way to the match (which they won). RPI also won the Wingate Memorial Trophy as national collegiate champions (shared with Virginia) in 1952. Future NHL head coach Ned Harkness coached the lacrosse and ice hockey teams, winning national championships in both sports.
https://en.wikipedia.org/wiki?curid=23170884
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The variation in gene frequency between the original population and colony may also trigger the two groups to diverge significantly over the course of many generations. As the variance, or genetic distance, increases, the two separated populations may become distinctively different, both genetically and phenotypically, although not only genetic drift, but also natural selection, gene flow and mutation all contribute to this divergence. This potential for relatively rapid changes in the colony's gene frequency led most scientists to consider the founder effect (and by extension, genetic drift) a significant driving force in the evolution of new species. Sewall Wright was the first to attach this significance to random drift and small, newly isolated populations with his shifting balance theory of speciation. Following behind Wright, Ernst Mayr created many persuasive models to show that the decline in genetic variation and small population size accompanying the founder effect were critically important for new species to develop. However, much less support for this view is shown today, since the hypothesis has been tested repeatedly through experimental research, and the results have been equivocal at best. Speciation by genetic drift is a specific case of peripatric speciation which in itself occurs in rare instances. It takes place when a random change in genetic frequency of population favours the survival of a few organisms of the species with rare genes which cause reproductive mutation. These surviving organisms then breed among themselves over a long period of time to create a whole new species whose reproductive systems or behaviors are no longer compatible with the original population.
https://en.wikipedia.org/wiki?curid=392309
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QBMM is a relatively new simulation technique for granular systems and has attracted interest from researchers in computational physics, chemistry, and engineering. QBMM is similar to traditional CFD methods, which solve the conservation equations of macroscopic properties (i.e., mass, momentum, and energy) numerically, but QBMM accomplishes this by modeling the fluid as consisting of fictive particles, or nodes, that constitute a discretized PDF. A node consists of an abscissa/weight pair and the weight defines the probability of finding a particle that has the value of its abscissa. This quadrature approximation may also be adaptive, meaning that the number of nodes can increase/decrease to accommodate appropriately complex/simple PDF's. Due to its statistical nature, QBMM has several advantages over other conventional Lagrangian methods, especially in dealing with complex boundaries, incorporating microscopic interactions (such as collisions), parallelization of the algorithm, and computational costs being largely independent of particle population. The numerical methods for solving the system of partial differential equations can be interpreted as the propagation (with a flux term) and interactions (source terms) of fictitious particle probabilities in an Eulerian framework.
https://en.wikipedia.org/wiki?curid=44436862
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In 1839, the German anatomist Hermann Friedrich Stannius discovered a pair of novel structures inside the kidneys of sturgeon and bony fishes. He believed that they were a kind of adrenal gland (found in mammals) in these fishes. In 1896, the French physiologist A. Petit demonstrated that removal of one of the structures led to degeneration of the other. He suggested that these structures were endocrine organs. In 1908, the Italian zoologist Ercole Giacomini was the first to describe that these structures were present only in fishes which lack a parathyroid gland. He distinguished and named them "posterior interrenal" from the anterior portion of the kidney, which he named "anterior interrenal". A French Physiologist M. Fontaine reported that the corpuscles were responsible for controlling calcium level in the blood. In 1971 Peter K.T. Pang of Yale University showed in the male killifish, "Fundulus heteroclitus", that the corpuscles control calcium metabolism. He found that removal of the corpuscle led to development of kidney stone and increase in serum calcium level. By the mid 1970s, it was confirmed that the corpuscles secrete a factor that can reduce calcium level, similar to calcitonin but completely different. and Pang gave the prospective name "hypocalcin". The chemical compound was isolated in 1986 from sockeye salmon ("Oncorhynchus nerka"), and since it was from a teleost, it was called "teleocalcin". A better isolation was reported in 1988 from different species, including European eel, tilapia, goldfish, and carp. It was realised that both hypocalcin and teleocalcin are the same. It was conclusively shown that the isolated compound was the factor that reduces calcium level in these fishes. In 1990, the exact chemical composition and biosynthesis war worked out, and was given the name "stanniocalcin" as it was found to be exclusively produced by the corpuscles of Stannius. The complete amino acid sequence was described in 1995.
https://en.wikipedia.org/wiki?curid=48377986
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Tyson then moves on to consider if life on other planets could exist. He explains how Project Diana, performed in the 1940s, showed that radio waves are able to travel in space, and that all of humanity's broadcast signals continue to radiate into space from our planet. Tyson says that projects have since looked for similar signals potentially emanating from other solar systems and that the development and lifespan of extraterrestrial civilizations must be considered for such detection to be realized. According to Tyson, civilizations can be wiped out by cosmic events like supernovae, natural disasters such as the Toba disaster, or even self-destruct through war or other means, making probability estimates difficult. Tyson describes how elliptical galaxies, in which some of the oldest red dwarf stars exist, would offer the best chance of finding established civilizations. He concludes that human intelligence properly applied should allow our species to avoid such disasters and enable us to migrate beyond the Earth before the Sun's eventual transformation into a red giant.
https://en.wikipedia.org/wiki?curid=42818221
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Theoretical physics began at least 2,300 years ago, under the Pre-socratic philosophy, and continued by Plato and Aristotle, whose views held sway for a millennium. During the rise of medieval universities, the only acknowledged intellectual disciplines were the seven liberal arts of the "Trivium" like grammar, logic, and rhetoric and of the "Quadrivium" like arithmetic, geometry, music and astronomy. During the Middle Ages and Renaissance, the concept of experimental science, the counterpoint to theory, began with scholars such as Ibn al-Haytham and Francis Bacon. As the Scientific Revolution gathered pace, the concepts of matter, energy, space, time and causality slowly began to acquire the form we know today, and other sciences spun off from the rubric of natural philosophy. Thus began the modern era of theory with the Copernican paradigm shift in astronomy, soon followed by Johannes Kepler's expressions for planetary orbits, which summarized the meticulous observations of Tycho Brahe; the works of these men (alongside Galileo's) can perhaps be considered to constitute the Scientific Revolution.
https://en.wikipedia.org/wiki?curid=19594028
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An island chain began forming in New Mexico's shallow sea during the Carboniferous. Areas still submerged were home to brachiopods and clams. The islands themselves were thickly vegetated with forests and swamps. Into the Mississippian, crinoids and other fossil life built huge bioherms. The local Mississippian biodiversity included at least 6 kinds of blastoids 202 brachiopods, 33 bryozoans, 57 corals, 85 crinoids, 22 gastropods, 7 nautiloids, 8 pelecypods, 9 trilobites, and others including foraminiferans and starfishes. On land primitive plants grew in New Mexico. The state's Mississippian flora of New Mexico included horsetails and scale trees. Pennsylvanian New Mexico experienced both marine and terrestrial conditions over time. Marine life included more than 157 species of brachiopods, 41 bryozoans, 34 cephalopods, 34 corals, 118 foraminiferans, 87 gastropods, 25 ostracods and 85 pelecypods. Exceptional brachiopod specimens from this time still retain traces of their shell colorations. The foraminiferans were present in "tremendous abundance", with the most common varieties being fusulinids. Other important fossils provide paleoecological evidence for Pennsylvanian parasitism. 60 different kind of plants grew above the surface of New Mexico's Pennsylvanian waters. Early in the ensuing Permian period the local climate dried significantly. Local rivers dried up and fields of sand dunes took their place. Sea levels dropped and the water became extremely salty. During the middle part of the Permian the seas returned to a more typical state. At this time a huge reef system began to form at El Capitan in the southeastern part of the state. Most of New Mexico was under seawater during the ensuing Permian. More than 300 kinds of marine life have been discovered in the state. On land, at least 20 kinds of plants including early conifers, horsetails, and seed ferns grew. New Mexico's terrestrial environments were inhabited by creatures such as "Aerosaurus", "Edaphosaurus", "Limnoscelis", "Ophiacodon", and "Sphenacodon". Many of these creatures' footprints were preserved in mudflats that are contained within the Prehistoric Trackways National Monument in Las Cruces.
https://en.wikipedia.org/wiki?curid=37799149
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Earlier forms of individual trolley scenarios antedated Foot's publication. Frank Chapman Sharp included a version in a moral questionnaire given to undergraduates at the University of Wisconsin in 1905. In this variation, the railway's switchman controlled the switch, and the lone individual to be sacrificed (or not) was the switchman's child. German philosopher of law Karl Engisch discussed a similar dilemma in his habilitation thesis in 1930, as did German legal scholar Hans Welzel in a work from 1951. In his commentary on the Talmud, published long before his death in 1953, Avrohom Yeshaya Karelitz considered the question of whether it is ethical to deflect a projectile from a larger crowd toward a smaller one. Similarly, in "The Strike", a television play broadcast in the United States on June 7, 1954, a commander in the Korean War must choose between ordering an air strike on an encroaching enemy force at the cost of his own 20-man patrol unit, or calling off the strike and risking the lives of the main army made up of 500 men.
https://en.wikipedia.org/wiki?curid=301658
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It was suggested in 2003 that brachiopods had evolved from an ancestor similar to "Halkieria", a slug-like Cambrian animal with "chain mail" on its back and a shell at the front and rear end; it was thought that the ancestral brachiopod converted its shells into a pair of valves by folding the rear part of its body under its front. However, new fossils found in 2007 and 2008 showed that the "chain mail" of tommotiids formed the tube of a sessile animal; one tommotiid resembled phoronids, which are close relatives or a subgroup of brachiopods, while the other tommotiid bore two symmetrical plates that might be an early form of brachiopod valves. Lineages of brachiopods that have both fossil and extant taxa appeared in the early Cambrian, Ordovician, and Carboniferous periods, respectively. Other lineages have arisen and then become extinct, sometimes during severe mass extinctions. At their peak in the Paleozoic era, the brachiopods were among the most abundant filter-feeders and reef-builders, and occupied other ecological niches, including swimming in the jet-propulsion style of scallops. Brachiopod fossils have been useful indicators of climate changes during the Paleozoic. However, after the Permian–Triassic extinction event, brachiopods recovered only a third of their former diversity. A study in 2007 concluded the brachiopods were especially vulnerable to the Permian–Triassic extinction, as they built calcareous hard parts (made of calcium carbonate) and had low metabolic rates and weak respiratory systems. It was often thought that brachiopods went into decline after the Permian–Triassic extinction, and were out-competed by bivalves, but a study in 1980 found both brachiopod and bivalve species increased from the Paleozoic to modern times, with bivalves increasing faster; after the Permian–Triassic extinction, brachiopods became for the first time less diverse than bivalves.
https://en.wikipedia.org/wiki?curid=19827372
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Ha has been recognized internationally for his pioneering work in biophysics. In 2001, he was named a Searle Scholar, recognizing him as an "exceptional young scientist." The following year, he received a National Science Foundation CAREER Award and a Fluorescence Young Investigator Award from the Biophysical Society. In 2003, he was named a for his "high-quality research" and "dedication to the task of teaching undergraduates" and an Alfred P. Sloan Foundation Fellow for "outstanding promise." In 2005, Ha was elected to the American Physical Society and was named an Investigator of the Howard Hughes Medical Institute in the scientific disciplines of Biophysics and Structural Biology, a position he continues to hold today. He received the Michael and Kate Bárány Award of the Biophysical Society in 2007 for "his development and application of novel single molecule physical methods and techniques, and for his ground-breaking discoveries in the single molecule research field." In 2011, Ha won the Ho-Am Prize in Science for his "pioneering application of fluorescence resonance energy transfer techniques to reveal the behavior and physical characteristics of single biomolecules"; this prize is "widely regarded as the Korean equivalent of the Nobel Prizes." He was named the 2012 Scientist of the Year by the Korean-American Scientists and Engineers Association (KSEA) and Korean Federation of Science and Technology Societies (KOFST).
https://en.wikipedia.org/wiki?curid=36647140
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Fortunately, all the world's top teams were able to partake in the next World Championship, which was held in 1986 in Soviet Union. One month before start of tournament, United States won the basketball tournament at the 1986 Goodwill Games in Moscow by beating Soviet Union with great margin of 23 points (83–60). Both reigning Olympic Champions (United States) and World Champions (Soviet Union) won all their group and semifinal matches, and then met in the final match in Moscow. In this final, US team once again proved their superiority by winning with a margin of 20 points (108–88) thus ending the remarkable winning streak of the Soviet team at the World Championships which lasted 56 consecutive matches. This victory became the turning point which marked beginning of the era of dominance of the United States in world women's basketball. At the 1988 Summer Olympics in Seoul, South Korea, the US team defended their Olympic title by beating the Yugoslavia in the final match (77–70) while the Soviet team failed to reach the final and unexpectively finished only in third place for the first time in their history. At the next World Championship which was held in 1990 in Malaysia, Soviet Union lost in the second group round to Czechoslovakia (79–82) and Yugoslavia (63–64) and finished only at fifth place. It was the first and only time the Soviet women's team had failed to reach the podium at the international level competition. Like two years prior, the United States and Yugoslavia once more met in the final match, and US team achieved victory again (88–78) by winning their sixth World title. Two years later, the United States went to 1992 Summer Olympics in Barcelona, Spain in the status of favorites to win - especially after the Yugoslavian team was banned from competition due to United Nations sanctions. However, the former Soviet players who competed for the Unified Team, as a result of Soviet Union's dissolution in December 1991, managed to achieve surprising success after a shocking victory over United States in the semifinals (79–73) and managed a victory over the China in the final match (76–66). The US team finished in third place. This was the last victory of Soviet-born players at the World level competitions, and the Unified Team ceased to exist after that.
https://en.wikipedia.org/wiki?curid=5779563
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Programmed cell death can be reduced or eliminated in the developing nervous system by the targeted deletion of pro-apoptotic genes or by the overexpression of anti-apoptotic genes. The absence or reduction of PCD can cause serious anatomical malformations but can also result in minimal consequences depending on the gene targeted, neuronal population, and stage of development. Excess progenitor cell proliferation that leads to gross brain abnormalities is often lethal, as seen in caspase-3 or caspase-9 knockout mice which develop exencephaly in the forebrain. The brainstem, spinal cord, and peripheral ganglia of these mice develop normally, however, suggesting that the involvement of caspases in PCD during development depends on the brain region and cell type. Knockout or inhibition of apoptotic protease activating factor 1 (APAF1), also results in malformations and increased embryonic lethality. Manipulation of apoptosis regulator proteins Bcl-2 and Bax (overexpression of Bcl-2 or deletion of Bax) produces an increase in the number of neurons in certain regions of the nervous system such as the retina, trigeminal nucleus, cerebellum, and spinal cord. However, PCD of neurons due to Bax deletion or Bcl-2 overexpression does not result in prominent morphological or behavioral abnormalities in mice. For example, mice overexpressing Bcl-2 have generally normal motor skills and vision and only show impairment in complex behaviors such as learning and anxiety. The normal behavioral phenotypes of these mice suggest that an adaptive mechanism may be involved to compensate for the excess neurons.
https://en.wikipedia.org/wiki?curid=374215
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Early researchers, such as Jonathan Pool, considered a concept dating back to the account of the Tower of Babel: that linguistic unity may allow for higher levels of development. While pointing out obvious oversimplifications and the subjectivity of definitions and data collection, Pool suggested that we had yet to see a robust economy emerge from a nation with a high degree of linguistic diversity. In his research Pool used the "size of the largest native-language community as a percentage of the population" as his measure of linguistic diversity. Not much later, however, Horowitz pointed out that both highly diverse and highly homogeneous societies exhibit less conflict than those in between. Similarly, Collier and Hoeffler provided evidence that both highly homogenous and highly heterogeneous societies exhibit lower risk of civil war, while societies that are more polarized are at greater risk. As a matter of fact, their research suggests that a society with only two ethnic groups is about 50% more likely to experience civil war than either of the two extremes. Nonetheless, Mauro points out that ethno-linguistic fractionalization is positively correlated with corruption, which in turn is negatively correlated with economic growth. Moreover, in a study on economic growth in African countries, Easterly and Levine find that linguistic fractionalization plays a significant role in reducing national income growth and in explaining poor policies. In addition, empirical research in the U.S., at the municipal level, has revealed that ethnic fractionalization (based on race) may be correlated with poor fiscal management and lower investments in public goods. Finally, more recent research would propose that ethno-linguistic fractionalization is indeed negatively correlated with economic growth while more polarized societies exhibit greater public consumption, lower levels of investment and more frequent civil wars.
https://en.wikipedia.org/wiki?curid=210183
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After her PhD, Hallberg moved to Germany to work as a postdoctoral researcher at the Max Planck Institute for Solid State Research (MPI-FKF) and at the Max Planck Institute for the Physics of Complex Systems (MPI-PKS). Hallberg returned to the Bariloche Atomic Centre in 1997. She has extensively developed computer simulations to understand quantum matter. She is interested in emergent properties such as conductivity, superconductivity and magnetism. Hallberg is a researcher at National Scientific and Technical Research Council (CONICET) and led the National Atomic Energy Commission (CNEA) condensed matter theory group at the Bariloche Atomic Center. She is a Senior Associate of the International Centre for Theoretical Physics (ICTP) and of the International Center for Theoretical Physics-South American Institute for Fundamental Research (ICTP-SAIFR). Hallberg worked on several numerical tools, including the density matrix renormalization group (DMRG), a numerical method that can be used for low-dimensional strongly correlated bosonic and fermionic systems. She has studied superconductivity, magnetic order and spin-orbit coupling in complex materials and electronic transport in nanoscopic systems. She has visited and collaborated with centers such as the Indian Institute of Sciences (Bangalore), Oxford University (UK), the London Center for Nanotechnology (UK), University of Augsburg (Germany), University of Fribourg (Switzerland), University of Boston and Argonne National Lab (US) and the University of Tokyo.
https://en.wikipedia.org/wiki?curid=60320792
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Sealing is the final step in the anodizing process. Acidic anodizing solutions produce pores in the anodized coating. These pores can absorb dyes and retain lubricants but are also an avenue for corrosion. When lubrication properties are not critical, they are usually sealed after dyeing to increase corrosion resistance and dye retention. There are three most common types of sealing. First, long immersion in boiling-hot (96–100°C/205-212°F) deionized water or steam is the simplest sealing process, although it is not completely effective and reduces abrasion resistance by 20%. The oxide is converted into its hydrated form and the resulting swelling reduces the porosity of the surface. Second, mid-temperature sealing process which works at 160-180°F (60-80°C) in solutions containing organic additives and metal salts. However, this process will likely leach the colors. Third, Cold sealing process, where the pores are closed by impregnation of a sealant in a room-temperature bath, is more popular due to energy savings. Coatings sealed in this method are not suitable for adhesive bonding. Teflon, nickel acetate, cobalt acetate, and hot sodium or potassium dichromate seals are commonly used. MIL-A-8625 requires sealing for thin coatings (Types I and II) and allows it as an option for thick ones (Type III).
https://en.wikipedia.org/wiki?curid=831650
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Saturday's afternoon one hour qualifying session saw each driver limited to twelve laps, with the starting order decided by their fastest laps. During this session, the 107% rule was in effect, which necessitated each driver set a time within 107 per cent of the quickest lap to qualify for the race. The session was held in cloudy weather with occasional rain showers. Michael Schumacher clinched his seventh pole position for the season, his first at the circuit, with a time of 1:14.266. He was joined on the front row of the grid by Coulthard, who was one-tenth of a second slower and was helped by running in the slipstream of teammate Häkkinen on the main straight. Häkkinen qualified third and stated that he was not unhappy with his starting position. Barrichello qualified fourth, three-tenths of a second behind Michael Schumacher, and said he had more grip in his car to improve his time. Trulli qualified fifth. Button took sixth after encountering a yellow flag for Jean Alesi's engine failure on his third run and admitted to pushing too hard at the first corner on his fourth attempt following encouragement by his team. Frentzen slid onto the grass during the session and managed to record the seventh quickest time. Villeneuve who secured eighth believed he could have set a faster time as he spun while on a quick lap. Diniz took ninth having removed some downforce which improved the feel of his car. Ralf Schumacher rounded out the top ten having suffered his spin on his fourth run. Wurz qualified eleventh and said that he was happy with his car. Ricardo Zonta qualified twelfth, blaming his car for his qualifying performance. He was ahead of Verstappen and Salo. Fisichella, who started 15th, stated that understeer and poor grip prevented him from setting a faster lap time. He managed to qualify ahead of Heidfeld and Irvine, who spun during the session. Arrows driver Pedro de la Rosa, Herbert and Alesi filled the next three positions; the latter had a lack of running due to a pneumatic valve system failure in his engine. The two Minardi drivers qualified at the rear of the grid; Gastón Mazzacane in front of Gené.
https://en.wikipedia.org/wiki?curid=1123406
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The apparent, earliest formal division of the geologic record with respect to time was introduced by Thomas Burnet who applied a two-fold terminology to mountains by identifying ""montes primarii"" for rock formed at the time of the 'Deluge', and younger ""monticulos secundarios"" formed later from the debris of the ""primarii"". This attribution to the 'Deluge', while questioned earlier by the likes of da Vinci, was the foundation of Abraham Gottlob Werner's (1749–1817) Neptunism theory in which all rocks precipitated out of a single flood. A competing theory, Plutonism, was developed by Anton Moro (1687–1784) and also used primary and secondary divisions for rock units. In this early version of the Plutonism theory, the interior of Earth was seen as hot, and this drove the creation of primary igneous and metamorphic rocks and secondary rocks formed contorted and fossiliferous sediments. These primary and secondary divisions were expanded on by Giovanni Targioni Tozzetti (1712–1783) and Giovanni Arduino (1713–1795) to include tertiary and quaternary divisions. These divisions were used to describe both the time during which the rocks were laid down, and the collection of rocks themselves (i.e., it was correct to say Tertiary rocks, and Tertiary Period). Only the Quaternary division is retained in the modern geologic time scale, while the Tertiary division was in use until the early 21st century. The Neputism and Plutonism theories would compete into the early 19th century with a key driver for resolution of this debate being the work of James Hutton (1726–1797), in particular his "Theory of the Earth", first presented before the Royal Society of Edinburgh in 1785. Hutton's theory would later become known as uniformitarianism, popularised by John Playfair (1748–1819) and later Charles Lyell (1797–1875) in his "Principles of Geology". Their theories strongly contested the 6,000 year age of the Earth as suggested determined by James Ussher via Biblical chronology that was accepted at the time by western religion. Instead, using geological evidence, they contested Earth to be much older, cementing the concept of deep time.
https://en.wikipedia.org/wiki?curid=12967
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After several years of many changes to the teams, the 2008–09 season came with only one change. Oji Paper renamed themselves to Oji Eagles in July 2008. The league increased China's allowance to seven import players to help their competitiveness. Prior to the start of the regular season a series of exhibition games, dubbed "Anyang Cup 2008" was held in Anyang. Five of the seven teams in the league participated with the Ice Bucks and Rabbits sitting out. Oji won the exhibition tournament without losing a game. The league increased the number of games played to 36 and balanced the schedule by having all teams play each other an equal amount. Early in the season the Halla coach, Shim Eui-sik was suspended for refusal to play after a disputed goal against High1. Halla was forced to forfeit the game, but at the end of the regular season they had finished in first place with 76 points, becoming the first non-Japanese team to do so. Brock Radunske of Halla finished first in goals and points with 29 and 57 respectively. Kunihiko Sakurai, a previous MVP, finished on top with 40 assists in the regular season. The league reduced the number of teams making the playoffs and only five teams advanced. The first round saw a short three games series between the Cranes and High1. The Cranes swept High1 in two games. The second round found the regular season winners, Halla, facing the Cranes and Oji facing the Rabbits. Halla and the Cranes took it to seven games, but Halla lost on home ice. After the previous year's record setting playoff run, Oji found themselves swept by the Rabbits in four games. For the fourth time in five years the final was between the Rabbits and Cranes. The Cranes won for the second time. The Cranes swept the playoffs point race with Kengo Itoh taking the lead with 16 assists and 21 points. Masahito Nishiwaki led with 12 goals. Brock Radunske took the award for MVP of the Year marking the first time the award has gone to an import player. Young Guy of the Year went to Kim Ki-sung, also from Halla.
https://en.wikipedia.org/wiki?curid=2209949
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Starting in the late 1960s, the budget of the NIH as a whole was reduced, which affected NINDS. Training programs were cut. President Richard Nixon's administration directed the institutes to work more aggressively on applied research and projects that would directly affect patients. Natalie Spingarn argues in her book about the politics of health research that the Nixon administration resisted scientists who did were not politically sympathetic to the president. Shannon has described the years between 1967 and 1970 as a time of "progressive constraints": the budgetary process was "chaotic", with "Presidential vetoes, overrides by Congress, proposed recission of funds allocated, acceptance or rejection of these recissions by Congress, impoundment of appropriations, and their later release by court action". In general, increases in the NIH budget during the 1970s and 1980s often did not exceed inflation. Edward F. MacNichol, who was director of NINDS between 1968 and 1973 described his tenure as the end of a "long period of NIH prosperity". Rowland writes that "these years of financial insecurity may have been the most difficult time in the history of NINDS". However, he notes the achievements they made as well. For example, King Engel and his team discovered that prednisone could effectively treat myasthenia gravis and acetazolamide was shown to prevent periodic paralysis.
https://en.wikipedia.org/wiki?curid=237641
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The material is a ternary polyhydride compound of carbon, sulfur and hydrogen with a chemical formula that is thought to be CSH. As of October 2020, the material's molecular structure remains uncharacterized, as extreme pressures and the light elements used are unsuitable for most measurements, such as X-ray determination. The material is synthesized by compressing methane (CH), hydrogen sulfide (HS) and hydrogen (H) in a diamond anvil cell and illuminating with a 532 nm green laser. A starting compound of carbon and sulfur is synthesized with a 1:1 molar ratio, formed into balls less than five microns in diameter, and placed into a diamond anvil cell. Hydrogen gas is then added and the system is compressed to 4.0 GPa and illuminated with a 532-nm laser for several hours. It was reported that the crystal is not stable under 10 GPa and can be destroyed if left at room temperature overnight. Research into the material is ongoing and, as of January 2022, they discovered by using the minimal hopping structure prediction method coupled to the GPU-accelerated sirius library, only 24 stoichiometries are favorable against elemental decomposition, and all of them are carbon-doped H3S crystals. The absence of van Hove singularities or similar peaks in the electronic density of states of more than 3000 candidate phases rules out conventional superconductivity in C-S-H at room temperature.
https://en.wikipedia.org/wiki?curid=65584884
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