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Dew point

The dew point is the temperature to which air must be cooled to become saturated with water vapor. When further cooled, the airborne water vapour will condense to form liquid water; when air cools to its dew point through contact with a surface, colder than the air, water will condense on the surface. When the temperature is below the freezing point of water, the dew point is called the frost point, as frost is formed rather than dew; the measurement of the dew point is related to humidity. A higher dew point means. If all the other factors influencing humidity remain constant, at ground level the relative humidity rises as the temperature falls. In normal conditions, the dew point temperature will not be greater than the air temperature, since relative humidity cannot exceed 100%. In technical terms, the dew point is the temperature at which the water vapor in a sample of air at constant barometric pressure condenses into liquid water at the same rate at which it evaporates. At temperatures below the dew point, the rate of condensation will be greater than that of evaporation, forming more liquid water.

The condensed water is called frost if it freezes. In the air, the condensed water is called either fog or a cloud, depending on its altitude when it forms. If the temperature is below the dew point, the vapor is called supersaturated; this can happen. A high relative humidity implies. A relative humidity of 100% indicates the dew point is equal to the current temperature and that the air is maximally saturated with water; when the moisture content remains constant and temperature increases, relative humidity decreases, but the dew point remains constant. General aviation pilots use dew point data to calculate the likelihood of carburetor icing and fog, to estimate the height of a cumuliform cloud base. Increasing the barometric pressure increases the dew point; this means that, if the pressure increases, the mass of water vapor in the air must be reduced in order to maintain the same dew point. For example, consider New York and Denver; because Denver is at a higher elevation than New York, it will tend to have a lower barometric pressure.

This means that if the dew point and temperature in both cities are the same, the amount of water vapor in the air will be greater in Denver. When the air temperature is high, the human body uses the evaporation of sweat to cool down, with the cooling effect directly related to how fast the perspiration evaporates; the rate at which perspiration can evaporate depends on how much moisture is in the air and how much moisture the air can hold. If the air is saturated with moisture, perspiration will not evaporate; the body's thermoregulation will produce perspiration in an effort to keep the body at its normal temperature when the rate at which it is producing sweat exceeds the evaporation rate, so one can become coated with sweat on humid days without generating additional body heat. As the air surrounding one's body is warmed by body heat, it will rise and be replaced with other air. If air is moved away from one's body with a natural breeze or a fan, sweat will evaporate faster, making perspiration more effective at cooling the body.

The more unevaporated perspiration, the greater the discomfort. A wet bulb thermometer uses evaporative cooling, so it provides a good measure for use in evaluating comfort level. Discomfort exists when the dew point is low; the drier air can cause skin to become irritated more easily. It will dry out the airways; the US Occupational Safety and Health Administration recommends indoor air be maintained at 20–24.5 °C with a 20–60% relative humidity, equivalent to a dew point of 4.0 to 15.5 °C. Lower dew points, less than 10 °C, correlate with lower ambient temperatures and causes the body to require less cooling. A lower dew point can go along with a high temperature only at low relative humidity, allowing for effective cooling. People inhabiting tropical and subtropical climates acclimatize somewhat to higher dew points. Thus, a resident of Singapore or Miami, for example, might have a higher threshold for discomfort than a resident of a temperate climate like London or Chicago. People accustomed to temperate climates begin to feel uncomfortable when the dew point gets above 15 °C, while others might find dew points up to 18 °C comfortable.

Most inhabitants of temperate areas will consider dew points above 21 °C oppressive and tropical-like, while inhabitants of hot and humid areas may not find this uncomfortable. Thermal comfort depends not just on physical environmental factors, but on psychological factors. Devices called; these devices consist of a polished metal mirror, cooled as air is passed over it. The temperature at which dew forms is, by definition, the dew point. Manual devices of this sort can be used to calibrate other types of humidity sensors, automatic sensors may be used in a control loop with a humidifier or dehumidifier to control the dew point of the air in a building or in a smaller space for a manufacturing process. A well-known approximation used to calculate the dew point, given just the actual air temperature, T and relative humidity, RH, is the Magnus formula: The more complete formulation and origin of this approximation involves the in

Lusk Covered Bridge

The Lusk Covered Bridge was once located north of Marshall, United States. Two single-span dual lane Lattice Truss covered bridges were located at the site, one of which replaced the other. Salmon Lusk constructed the first bridge in 1840, after its destruction by flood in 1847, Lusk constructed the second. Both bridges were located on private land. Vermont native, Captain Salmon Lusk, had been part of General William Henry Harrison's expedition in 1811. Being sent out to scout a Route to Prophet's Town he traveled up the east side of the Wabash River to the mouth of Sugar Creek, which he followed to the Narrows. Eleven years his military service complete, he moved to this area with his wife Polly Beard Lusk. In 1825 he would use the one thousand acre grant that he had received for his military service to claim the land around the Narrows. In 1826 Lusk built a grist mill at the Narrows. By 1840 a sturdy bridge was needed to cross Sugar Creek. At least two open bridges had been built in the area.

Records show that Salmon Lusk built a two lane covered bridge just upstream from the current bridge. The materials for the bridge would have came from his land. On New Years Day, 1847, the Lusk Bridge, Lusk Mill, Prior Wright's Store and other buildings associated with these were washed away by a freshet on Sugar Creek. With the destruction of his first covered bridge at this spot on New Year's Day, 1847, Salmon Lusk would go on to rebuild the bridge that same year; this would be the fourth bridge built at this spot. The mill would not be rebuilt though and Prior Wright moved his business to Rockport, future site of the Jackson Covered Bridge. Record for Parke County show that William Blacklege was hired to conduct repairs on the bridge in 1866 for $800; these were the same flooding waters that damaged the Harrison Covered Bridge. Little is known of its destruction. No bridge spanned Sugar Creek at the site until the Narrows Covered Bridge was built in 1882. Parke County Covered Bridges Parke County Covered Bridge Festival Lusk Home and Mill Site

Henndorf am Wallersee

Henndorf am Wallersee named Henndorf, is a municipality of 4,777 inhabitants in the district of Salzburg-Umgebung in the state of Salzburg in Austria. The town was first mentioned in 6th century. Henndorf is located around 16 kilometres by the Wallersee lake; the municipality borders with Eugendorf, Neumarkt am Wallersee, Seekirchen am Wallersee, Köstendorf and Thalgau. It is divided into 9 Katastralgemeinden: the town of Henndorf and 8 villages: Carl Zuckmayer, German writer, lived for some years in Henndorf Richard Mayr renowned Austrian Bass-Baritone was closely associated with Henndorf. Salzkammergut Salzkammergut-Lokalbahn Salzburg S-Bahn Municipal site of Henndorf Henndorf on "Salzburg Wiki"

Frits Van den Berghe

Frits Van den Berghe was a Belgian expressionist and surrealist painter and illustrator. His father was the Librarian at the University of Ghent. From 1898 to 1904, he studied at the Royal Academy of Fine Arts under Jean Delvin. In 1904, on the recommendation of his fellow painter, Alfons Dessenis, he went to stay at the art colony in Sint-Martens-Latem, it was there he met Gustaaf De Smet and Constant Permeke. Together, they established, he obtained what would prove to be the lifelong support of the journalist and art promoter, Paul-Gustave van Hecke. In 1907 he was married and, shortly after, became a professor at the Ghent Academy. A few years his family life and artistic career were disturbed by a relationship with the actress, Stella van de Wiele. In 1914, he spent six months in the United States. During World War I, he became a refugee in the Netherlands. He, Stella and De Smet toured the art colonies in Amsterdam and Laren, where he taught, his work matured and came under the influence of Freudian psychoanalysis.

In 1922, after returning to Belgium, he lived with De Permeke in Oostende. After that, he and De Smet moved about western Flanders, seeking inspiration, settled in Afsnee at a villa supplied by Van Hecke, he spent some time in Brussels, but the Great Depression eliminated the market for any sort of modern art, so he returned to Ghent and became an illustrator for the Socialist newspaper, Vooruit. He worked for them until his death. From 1937 to 1938, he drew the panels for a comic strip written by Jean Ray. During his years, he painted in a surrealistic style, replete with dream visions and hallucinations. Major retrospectives were held in 1962 and 1984. On the sixtieth anniversary of his death, in 1999, a large exhibition was held in Oostende with, for the first time, his illustrations, his painting, "Zondag", was included in the German series 1000 Meisterwerke and featured on a Belgian postage stamp in 2001. Piet Boyens, Patrick Derom, Gilles Marquenie: Frits Van Den Berghe: Catalogue Raisonné, Exhibitions International, 2012 ISBN 90-532-5136-7 Anne Marie Musschoot, Yves T'Sjoen, Joost De Geest: Frits Van den Berghe en Richard Minne.

Stripverhalen 1931–1935, Snoeck-Ducaju & Zoon, 1996 ISBN 90-506-6167-X Emile Langui, Frits Van den Berghe 1883–1939. De mens en zijn werk, Antwerp, 1968 Paul-Gustave Van Hecke, Frits Van den Berghe, Volume 9 of "Monographies de l'art belge: Série 2", De Sikkel, 1950 Frits Van den Berghe @ the Lambiek Comiclopedia

Torrumbarry

Torrumbarry is a town in northern Victoria, Australia. The town is in the Shire of Campaspe local government area and on the Murray Valley Highway, 241 kilometres north of the state capital, Melbourne. At the 2016 census, Torrumbarry had a population of 279; the town was once large but shrunk over time. The town still houses a hall, a general store and a post office; the town is home to an important weir situated on the Murray River, a few kilometres north of the township. The weir was built in the 1920s, it operated efficiently until 1992. After numerous unsuccessful repairs, it was decided the weir would be rebuilt with a new design, completed during 1996. An information centre was built outlining the history of the weir. A post office was built at the weir in 1919 but closed 5 years due to the fact it was used. Media related to Torrumbarry, Victoria at Wikimedia Commons Campaspe Shire Suburb profile

Lilienthal Bekas

The Lilienthal Bekas is a 2/3 seat, high wing single engine pusher ultralight from Ukraine. First flown in 1993, it has been produced in several variants; the Lilienthal Bekas is a pod and boom, multi-purpose, pusher configuration ultralight with a high wing and low-set boom carrying a T-tail. The well glazed pod carries the constant chord wing at its top; the wing is braced to the lower fuselage by two pairs of cross braced struts and is fitted with flaps, which have a maximum deflection of 40°. A fixed, tricycle undercarriage with a castoring nosewheel is mounted on the pod; the engine is mounted behind the cabin. The engine is cowled on some aircraft but not all. Much of the slim boom is occupied by a broad chord fin with a straight swept leading edge. On some aircraft it is extended forwards with a fillet; the rudder hinge slightly swept, is at the end of the boom. The tailplane is of constant chord and braced to the end of the boom by a strut on each side; the aircraft has JAR-VLA certification.

The X-32 Bekas first flew in March 1993 and received its Ukrainian certification in 1995. The Rotax 582 and 912 variants were certified in 2005 respectively. Between 2003 and 2006, the X-32 and X-34 were marketed by JAI as the RumBird X-32 and GulfBird X-34. in India and South Asian Countries X-32 and X-34 are being marketed and produced by Their Indian partners Engenious Aerospace Ltd. http://engeniousaerospace.com/project/aircraft-x32/ By 2009, more than 400 X-32s had been sold. Data from Jane's All the World's Aircraft 2010/11 X-32AT Bekas Sports version, certified for limited aerobatics. X-32UT Bekas Dual control trainer version. X-32CK Bekas Agricultural version, which may be fitted with spray bars fed from tank replacing rear seat. X-32CX Bekas Agricultural version for crop spraying X-32A Bekas Ski undercarriage. X-32H Bekas Float undercarriage. X-34 Bekas Widened cabin with the two passengers side-by-side on a rear bench seat. Data from Jane's All the World's Aircraft 2010/11General characteristics Crew: one Capacity: one passenger Length: 6.55 m Wingspan: 9.00 m Height: 2.00 m Wing area: 12.33 m2 Airfoil: NACA 4412 Empty weight: 300 kg Max takeoff weight: 495 kg Powerplant: 1 × Rotax 912 flat-four, 60 kW Propellers: 3-bladed VPSH 2 Donchak variable pitch pusherPerformance Cruise speed: 120 km/h Stall speed: 55 km/h power off, flaps down Never exceed speed: 158 km/h Endurance: 3 hrs 20 min on normal fuel load g limits: +3.8/-1.9 Rate of climb: 5.0 m/s Official website Engenious Aerospace