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Exceptional Exposure Tables
Decompression in the context of diving derives from the reduction in ambient pressure experienced by the diver during the ascent at the end of a dive or hyperbaric exposure and refers to both the reduction in pressure and the process of allowing dissolved inert gases to be eliminated from the tissues during this reduction in pressure. When a diver descends in the water column the ambient pressure rises. Breathing gas is supplied at the same pressure as the surrounding water, and some of this gas dissolves into the diver's blood and other tissues. Inert gas continues to be taken up until the gas dissolved in the diver is in a state of equilibrium with the breathing gas in the diver's lungs, (see: "Saturation diving"), or the diver moves up in the water column and reduces the ambient pressure of the breathing gas until the inert gases dissolved in the tissues are at a higher concentration than the equilibrium state, and start diffusing out again. Dissolved inert gases such as nit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernest Moir Airlock 1889
Ernest is a given name derived from the Germanic word ''ernst'', meaning "serious", often shortened to Ernie. Notable people and fictional characters with the name include: People *Archduke Ernest of Austria (1553–1595), son of Maximilian II, Holy Roman Emperor *Ernest, Margrave of Austria (1027–1075) *Ernest, Duke of Bavaria (1373–1438) *Ernest, Duke of Opava (c. 1415–1464) *Ernest, Margrave of Baden-Durlach (1482–1553) *Ernest, Landgrave of Hesse-Rheinfels (1623–1693) *Ernest Augustus, Elector of Brunswick-Lüneburg (1629–1698) *Ernest, Count of Stolberg-Ilsenburg (1650–1710) *Ernest Augustus, King of Hanover (1771–1851), son of King George III of Great Britain *Ernest II, Duke of Saxe-Coburg and Gotha (1818–1893), sovereign duke of the Duchy of Saxe-Coburg and Gotha *Ernest Augustus, Crown Prince of Hanover (1845–1923) *Ernest, Landgrave of Hesse-Philippsthal (1846–1925) *Ernest Augustus, Prince of Hanover (1914–1987) *Prince Ernst August of Hano ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atmosphere (unit)
The standard atmosphere (symbol: atm) is a unit of pressure defined as Pa. It is sometimes used as a ''reference pressure'' or ''standard pressure''. It is approximately equal to Earth's average atmospheric pressure at sea level. History The standard atmosphere was originally defined as the pressure exerted by a 760 mm column of mercury at and standard gravity (''g''n = ). It was used as a reference condition for physical and chemical properties, and the definition of the centigrade temperature scale set 100 °C as the boiling point of water at this pressure. In 1954, the 10th General Conference on Weights and Measures (CGPM) adopted ''standard atmosphere'' for general use and affirmed its definition of being precisely equal to dynes per square centimetre (). This defined pressure in a way that is independent of the properties of any particular substance. In addition, the CGPM noted that there had been some misapprehension that the previous definition (from the 9th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perfusion
Perfusion is the passage of fluid through the circulatory system or lymphatic system to an organ (anatomy), organ or a tissue (biology), tissue, usually referring to the delivery of blood to a capillary bed in tissue. Perfusion may also refer to fixation via perfusion, used in histological studies. Perfusion is measured as the rate at which blood is delivered to tissue, or volume of blood per unit time (blood volumetric flow rate, flow) per unit tissue mass. The SI unit is m3/(s·kg), although for human organs perfusion is typically reported in ml/min/g. The word is derived from the French verb ''perfuser'', meaning to "pour over or through". All animal tissues require an adequate blood supply for health and life. Poor perfusion (malperfusion), that is, ischemia, causes health problems, as seen in cardiovascular disease, including coronary artery disease, cerebrovascular disease, peripheral artery disease, and many other conditions. Tests verifying that adequate perfusion exists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Downtown Hudson Tubes
The Downtown Hudson Tubes (formerly the Cortlandt Street Tunnel) are a pair of tunnels that carry PATH trains under the Hudson River in the United States, between New York City to the east and Jersey City, New Jersey, to the west. The tunnels run between the World Trade Center station on the New York side and the Exchange Place station on the New Jersey side. PATH operates two services through the Downtown Tubes, Newark–World Trade Center and Hoboken–World Trade Center. The former normally operates 24/7, while the latter only operates on weekdays. Description The Downtown Hudson Tubes use a roughly east-southeast to west-northwest path under the Hudson River, connecting Manhattan in the east with Jersey City in the west. Each track is located in its own tube, which enables better ventilation by the so-called piston effect. When a train passes through the tunnel it pushes out the air in front of it toward the closest ventilation shaft, and also pulls air into the rail t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernest William Moir
Sir Ernest William Moir (9 June 1862 – 14 June 1933) was a British civil engineer and the first Moir baronet. He is credited with inventing the first medical airlock while working on the Hudson River Tunnel in New York in 1889. Early life The son of Alexander Mitchell Moir and of Scottish descent, he was born in London and was educated at University College School. At a young age he showed a great interest in mechanics and became expert in mechanical and engineering work while in college. Aged about 15, Moir joined the engineering works of Messrs. Robert Napier and Sons in Glasgow where he served an apprenticeship as a mechanical engineer. He studied engineering at University College London before joining the firm of William Arrol in Glasgow where he started in the drawing office. In his early career he also came into close contact with John Fowler, Benjamin Baker and John Wolfe Barry. Engineering projects Moir was the assistant to James Henry Greathead (1844–96) on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paul Bert
Paul Bert (17 October 1833 – 11 November 1886) was a French zoologist, physiologist and politician. He is sometimes given the nickname "Father of Aviation Medicine". Life Bert was born at Auxerre ( Yonne). He studied law, earning a doctorate in Paris; then, under the influence of the zoologist Louis Pierre Gratiolet (1815–1865), he took up physiology, becoming one of Claude Bernard's most brilliant students. After graduating at Paris as doctor of medicine in 1863, and doctor of science in 1866, he was appointed professor of physiology successively at Bordeaux (1866) and the Sorbonne (1869). After the "Commune de Paris" (1870) he began to take part in politics as a supporter of Gambetta. In 1874 he was elected to the Assembly, where he sat on the extreme left, and in 1876 to the chamber of deputies. He was one of the most determined enemies of clericalism, and an ardent advocate of "liberating national education from religious sects, while rendering it accessible to eve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brooklyn Bridge
The Brooklyn Bridge is a cable-stayed suspension bridge in New York City, spanning the East River between the boroughs of Manhattan and Brooklyn. Opened on May 24, 1883, the Brooklyn Bridge was the first fixed crossing of the East River. It was also the List of longest suspension bridge spans#History of longest suspension spans, longest suspension bridge in the world when opened, with a main span of and a deck above Mean High Water. The span was originally called the New York and Brooklyn Bridge or the East River Bridge but was officially renamed the Brooklyn Bridge in 1915. Proposals for a bridge connecting Manhattan and Brooklyn were first made in the early 19th century; these plans evolved into what is now the Brooklyn Bridge, designed by John A. Roebling. The project's chief engineer, his son Washington Roebling, contributed further design work, assisted by the latter's wife, Emily Warren Roebling. Construction started in 1870 and was overseen by the New York Bridge Comp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eugène Bucquoy
Eugene is a common male given name that comes from the Greek εὐγενής (''eugenēs''), "noble", literally "well-born", from εὖ (''eu''), "well" and γένος (''genos''), "race, stock, kin". Henry George Liddell, Robert Scott, ''A Greek-English Lexicon'', on Perseus Gene is a common shortened form. The feminine variant is or Eugenie. Other male foreign-language variants include: People Notable people with the given name Eugene or Eugène include:Christianity *Eugene or |
