Question: What is the source of energy of this vehicle?

Instruction: Retrieve a Wikipedia paragraph that provides an answer to the given query about the image.

Steam locomotive. A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, oil or, rarely, wood) to heat water in the locomotive's boiler to the point when it becomes gaseous and its volume increases 1,700 times. Functionally, it is a steam engine on wheels.In most locomotives, the steam is admitted alternately to each end of its cylinders, in which pistons are mechanically connected to the locomotive's main wheels. Fuel and water supplies are usually carried with the locomotive, either on.

Steam locomotive. a train along the tramway from the Pen-y-darren ironworks, near Merthyr Tydfil, to Abercynon in South Wales. Accompanied by Andrew Vivian, it ran with mixed success. The design incorporated a number of important innovations that included using high-pressure steam which reduced the weight of the engine and increased its efficiency.Trevithick visited the Newcastle area in 1804 and had a ready audience of colliery (coal mine) owners and engineers. The visit was so successful that the colliery railways in north-east England became the leading centre for experimentation and development of the steam locomotive. Trevithick continued his own steam propulsion experiments through.

Steam locomotive. Völklingen), but neither could be returned to working order after being dismantled, moved and reassembled. On 7 December 1835, the "Adler" ran for the first time between Nuremberg and Fürth on the Bavarian Ludwig Railway. It was the 118th engine from the locomotive works of Robert Stephenson and stood under patent protection.In Russia, the first steam locomotive was built in 1834 by Cherepanovs, however, it suffered from the lack of coal in the area and was replaced with horse traction after all the woods nearby had been cut down. The first Russian Tsarskoye Selo steam railway started in 1837 with.

Steam locomotive. Hungary which used the water-tube Brotan boiler.A boiler consists of a firebox where the fuel is burned, a barrel where water is turned into steam and a smokebox which is kept at a slightly lower pressure than outside the firebox.Solid fuel, such as wood, coal or coke, is thrown into the firebox through a door by a fireman, onto a set of grates which hold the fuel in a bed as it burns. Ash falls through the grate into an ashpan. If oil is used as the fuel, a door is needed for adjusting the air flow, maintaining the firebox,.

Steam locomotive. This pressure difference causes air to flow up through the coal bed and keeps the fire burning.The search for thermal efficiency greater than that of a typical fire-tube boiler led engineers, such as Nigel Gresley, to consider the water-tube boiler. Although he tested the concept on the LNER Class W1, the difficulties during development exceeded the will to increase efficiency by that route.The steam generated in the boiler not only moves the locomotive, but is also used to operate other devices such as the whistle, the air compressor for the brakes, the pump for replenishing the water in the boiler.

Steam locomotive. in various configurations, including two tanks alongside (side tanks or pannier tanks), one on top (saddle tank) or one between the frames (well tank).The fuel used depended on what was economically available to the railway. In the UK and other parts of Europe, plentiful supplies of coal made this the obvious choice from the earliest days of the steam engine. Until 1870, the majority of locomotives in the United States burned wood, but as the Eastern forests were cleared, coal gradually became more widely used until it became the dominant fuel worldwide in steam locomotives. Railways serving sugar cane farming.

Steam locomotive. operations burned bagasse, a byproduct of sugar refining. In the US, the ready availability and low price of oil made it a popular steam locomotive fuel after 1900 for the southwestern railroads, particularly the Southern Pacific. In the Australian state of Victoria, many steam locomotives were converted to heavy oil firing after World War II. German, Russian, Australian and British railways experimented with using coal dust to fire locomotives.During World War 2, a number of Swiss steam shunting locomotives were modified to use electrically heated boilers, consuming around 480 kW of power collected from an overhead line with a pantograph.

Steam locomotive. These locomotives were significantly less efficient than electric ones; they were used because Switzerland was suffering a coal shortage because of the War, but had access to plentiful hydroelectricity.A number of tourist lines and heritage locomotives in Switzerland, Argentina and Australia have used light diesel-type oil.Water was supplied at stopping places and locomotive depots from a dedicated water tower connected to water cranes or gantries. In the UK, the US and France, water troughs ("track pans" in the US) were provided on some main lines to allow locomotives to replenish their water supply without stopping, from rainwater or snowmelt that.

Steam locomotive. be removed by hand at the end of the run. As with the arrestor, a screen was incorporated to retain any large embers.Locomotives of the British Railways standard classes fitted with self-cleaning smokeboxes were identified by a small cast oval plate marked "S.C.", fitted at the bottom of the smokebox door. These engines required different disposal procedures and the plate highlighted this need to depot staff.## Stokers.A factor that limits locomotive performance is the rate at which fuel is fed into the fire. In the early 20th century some locomotives became so large that the fireman could not shovel coal.

Steam locomotive. such equipment.Booster engines were also fitted to tender trucks in the US and known as auxiliary locomotives. Two and even three truck axles were connected together using side rods which limited them to slow-speed service.## Firedoor.The firedoor is used to cover the firehole when coal is not being added. It serves two purposes, first, it prevents air being drawn over the top of the fire, rather forcing it to be drawn through it. The second purpose is to safeguard the train crew against blowbacks. It does, however, have a means to allow some air to pass over the top of.

Steam locomotive. of smoke for the engine driver to breathe as the locomotive passed through mountain tunnels and snow sheds. Another variation was the Camelback locomotive, with the cab situated halfway along the boiler. In England, Oliver Bulleid developed the SR Leader class locomotive during the nationalisation process in the late 1940s. The locomotive was heavily tested but several design faults (such as coal firing and sleeve valves) meant that this locomotive and the other part-built locomotives were scrapped. The cab-forward design was taken by Bulleid to Ireland, where he moved after nationalisation, where he developed the "turfburner". This locomotive was more.

Steam locomotive. steam is either a by-product or is cheaply available). The water vessel ("boiler") is heavily insulated, the same as with a fired locomotive. Until all the water has boiled away, the steam pressure does not drop except as the temperature drops.Another class of fireless locomotive is a compressed-air locomotive.## Mixed power.## Steam diesel hybrid locomotive.Mixed power locomotives, utilising both steam and diesel propulsion, have been produced in Russia, Britain and Italy.## Electric-steam locomotive.Under unusual conditions (lack of coal, abundant hydroelectricity) some locomotives in Switzerland were modified to use electricity to heat the boiler, making them electric-steam locomotives.## Steam-electric locomotive.A steam-electric.

Steam locomotive. railways used dynamometer cars to measure tractive force at speed in actual road testing.British railway companies have been reluctant to disclose figures for drawbar horsepower and have usually relied on continuous tractive effort instead.## Relation to wheel arrangement.Classification is indirectly connected to locomotive performance. Given adequate proportions of the rest of the locomotive, power output is determined by the size of the fire, and for a bituminous coal-fuelled locomotive, this is determined by the grate area. Modern non-compound locomotives are typically able to produce about 40 drawbar horsepower per square foot of grate. Tractive force, as noted earlier, is largely.

Steam locomotive. solids on the inside the surfaces of pipes and heat exchangers. This precipitation is principally caused by thermal decomposition of bicarbonate ions but also happens in cases where the carbonate ion is at saturation concentration. The resulting build-up of scale restricts the flow of water in pipes. In boilers, the deposits impair the flow of heat into the water, reducing the heating efficiency and allowing the metal boiler components to overheat.The reciprocating mechanism on the driving wheels of a two-cylinder single expansion steam locomotive tended to pound the rails (see hammer blow), thus requiring more maintenance. Raising steam from coal.

Steam locomotive. took a matter of hours, and created serious pollution problems. Coal-burning locomotives required fire cleaning and ash removal between turns of duty. Diesel or electric locomotives, by comparison, drew benefit from new custom-built servicing facilities. The smoke from steam locomotives was also deemed objectionable; the first electric and diesel locomotives were developed in response to smoke abatement requirements, although this did not take into account the high level of less-visible pollution in diesel exhaust smoke, especially when idling. In some countries, however, power for electric locomotives is derived from steam generated in power stations, which are often run by coal.##.

Steam locomotive. Unknown Warrior" project, GWR "47xx 4709, 2999 "Lady of Legend", 1014 "County of Glamorgan" and 6880 "Betton Grange" projects. These United Kingdom based new build projects are further complemented by the new build Pennsylvania Railroad 5550 project in the United States. One of the group's goals is to surpass the steam locomotive speed record held by the 4468 "Mallard" when the 5550 is completed and for the 5550 to fill in a huge gap in steam locomotive preservation.In 1980, American financier Ross Rowland established American Coal Enterprises to develop a modernised coal-fired steam locomotive. His ACE 3000 concept attracted considerable.

Steam locomotive. same company also rebuilt a German DR Class 52.80 2-10-0 locomotive to new standards with modifications such as roller bearings, light oil firing and boiler insulation.## Climate change.The future use of steam locomotives in the United Kingdom is in doubt because of government policy on climate change. The Heritage Railway Association is working with the All-Party Parliamentary Group on Heritage Rail in an effort to continue running steam locomotives on coal.Many tourist railroads use oil-fired steam locomotives (or have converted their locomotives to run on oil) to reduce their environmental footprint, and because fuel oil can be easier to obtain.

Steam locomotive. than coal of the proper type and sizing for locomotives. For example, the Grand Canyon Railway runs its steam locomotives on used vegetable oil.An organization called the Coalition for Sustainable Rail (CSR) is developing an environmentally friendly coal substitute made from torrefied biomass. In early 2019, they performed a series of tests using Everett Railroad to evaluate the performance of the biofuel, with positive results. The biofuel was found to burn slightly faster and hotter than coal. The goal of the project is primarily to find a sustainable fuel for historic steam locomotives on tourist railroads, but CSR has also.


Question: What is the source of energy of this vehicle?

Instruction: Retrieve a Wikipedia paragraph that provides an answer to the given query about the image.

Steam locomotive. A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, oil or, rarely, wood) to heat water in the locomotive's boiler to the point when it becomes gaseous and its volume increases 1,700 times. Functionally, it is a steam engine on wheels.In most locomotives, the steam is admitted alternately to each end of its cylinders, in which pistons are mechanically connected to the locomotive's main wheels. Fuel and water supplies are usually carried with the locomotive, either on.

Steam locomotive. a train along the tramway from the Pen-y-darren ironworks, near Merthyr Tydfil, to Abercynon in South Wales. Accompanied by Andrew Vivian, it ran with mixed success. The design incorporated a number of important innovations that included using high-pressure steam which reduced the weight of the engine and increased its efficiency.Trevithick visited the Newcastle area in 1804 and had a ready audience of colliery (coal mine) owners and engineers. The visit was so successful that the colliery railways in north-east England became the leading centre for experimentation and development of the steam locomotive. Trevithick continued his own steam propulsion experiments through.

Steam locomotive. Völklingen), but neither could be returned to working order after being dismantled, moved and reassembled. On 7 December 1835, the "Adler" ran for the first time between Nuremberg and Fürth on the Bavarian Ludwig Railway. It was the 118th engine from the locomotive works of Robert Stephenson and stood under patent protection.In Russia, the first steam locomotive was built in 1834 by Cherepanovs, however, it suffered from the lack of coal in the area and was replaced with horse traction after all the woods nearby had been cut down. The first Russian Tsarskoye Selo steam railway started in 1837 with.

Steam locomotive. Hungary which used the water-tube Brotan boiler.A boiler consists of a firebox where the fuel is burned, a barrel where water is turned into steam and a smokebox which is kept at a slightly lower pressure than outside the firebox.Solid fuel, such as wood, coal or coke, is thrown into the firebox through a door by a fireman, onto a set of grates which hold the fuel in a bed as it burns. Ash falls through the grate into an ashpan. If oil is used as the fuel, a door is needed for adjusting the air flow, maintaining the firebox,.

Steam locomotive. This pressure difference causes air to flow up through the coal bed and keeps the fire burning.The search for thermal efficiency greater than that of a typical fire-tube boiler led engineers, such as Nigel Gresley, to consider the water-tube boiler. Although he tested the concept on the LNER Class W1, the difficulties during development exceeded the will to increase efficiency by that route.The steam generated in the boiler not only moves the locomotive, but is also used to operate other devices such as the whistle, the air compressor for the brakes, the pump for replenishing the water in the boiler.

Steam locomotive. in various configurations, including two tanks alongside (side tanks or pannier tanks), one on top (saddle tank) or one between the frames (well tank).The fuel used depended on what was economically available to the railway. In the UK and other parts of Europe, plentiful supplies of coal made this the obvious choice from the earliest days of the steam engine. Until 1870, the majority of locomotives in the United States burned wood, but as the Eastern forests were cleared, coal gradually became more widely used until it became the dominant fuel worldwide in steam locomotives. Railways serving sugar cane farming.

Steam locomotive. operations burned bagasse, a byproduct of sugar refining. In the US, the ready availability and low price of oil made it a popular steam locomotive fuel after 1900 for the southwestern railroads, particularly the Southern Pacific. In the Australian state of Victoria, many steam locomotives were converted to heavy oil firing after World War II. German, Russian, Australian and British railways experimented with using coal dust to fire locomotives.During World War 2, a number of Swiss steam shunting locomotives were modified to use electrically heated boilers, consuming around 480 kW of power collected from an overhead line with a pantograph.

Steam locomotive. These locomotives were significantly less efficient than electric ones; they were used because Switzerland was suffering a coal shortage because of the War, but had access to plentiful hydroelectricity.A number of tourist lines and heritage locomotives in Switzerland, Argentina and Australia have used light diesel-type oil.Water was supplied at stopping places and locomotive depots from a dedicated water tower connected to water cranes or gantries. In the UK, the US and France, water troughs ("track pans" in the US) were provided on some main lines to allow locomotives to replenish their water supply without stopping, from rainwater or snowmelt that.

Steam locomotive. be removed by hand at the end of the run. As with the arrestor, a screen was incorporated to retain any large embers.Locomotives of the British Railways standard classes fitted with self-cleaning smokeboxes were identified by a small cast oval plate marked "S.C.", fitted at the bottom of the smokebox door. These engines required different disposal procedures and the plate highlighted this need to depot staff.## Stokers.A factor that limits locomotive performance is the rate at which fuel is fed into the fire. In the early 20th century some locomotives became so large that the fireman could not shovel coal.

Steam locomotive. such equipment.Booster engines were also fitted to tender trucks in the US and known as auxiliary locomotives. Two and even three truck axles were connected together using side rods which limited them to slow-speed service.## Firedoor.The firedoor is used to cover the firehole when coal is not being added. It serves two purposes, first, it prevents air being drawn over the top of the fire, rather forcing it to be drawn through it. The second purpose is to safeguard the train crew against blowbacks. It does, however, have a means to allow some air to pass over the top of.

Steam locomotive. of smoke for the engine driver to breathe as the locomotive passed through mountain tunnels and snow sheds. Another variation was the Camelback locomotive, with the cab situated halfway along the boiler. In England, Oliver Bulleid developed the SR Leader class locomotive during the nationalisation process in the late 1940s. The locomotive was heavily tested but several design faults (such as coal firing and sleeve valves) meant that this locomotive and the other part-built locomotives were scrapped. The cab-forward design was taken by Bulleid to Ireland, where he moved after nationalisation, where he developed the "turfburner". This locomotive was more.

Steam locomotive. steam is either a by-product or is cheaply available). The water vessel ("boiler") is heavily insulated, the same as with a fired locomotive. Until all the water has boiled away, the steam pressure does not drop except as the temperature drops.Another class of fireless locomotive is a compressed-air locomotive.## Mixed power.## Steam diesel hybrid locomotive.Mixed power locomotives, utilising both steam and diesel propulsion, have been produced in Russia, Britain and Italy.## Electric-steam locomotive.Under unusual conditions (lack of coal, abundant hydroelectricity) some locomotives in Switzerland were modified to use electricity to heat the boiler, making them electric-steam locomotives.## Steam-electric locomotive.A steam-electric.

Steam locomotive. railways used dynamometer cars to measure tractive force at speed in actual road testing.British railway companies have been reluctant to disclose figures for drawbar horsepower and have usually relied on continuous tractive effort instead.## Relation to wheel arrangement.Classification is indirectly connected to locomotive performance. Given adequate proportions of the rest of the locomotive, power output is determined by the size of the fire, and for a bituminous coal-fuelled locomotive, this is determined by the grate area. Modern non-compound locomotives are typically able to produce about 40 drawbar horsepower per square foot of grate. Tractive force, as noted earlier, is largely.

Steam locomotive. solids on the inside the surfaces of pipes and heat exchangers. This precipitation is principally caused by thermal decomposition of bicarbonate ions but also happens in cases where the carbonate ion is at saturation concentration. The resulting build-up of scale restricts the flow of water in pipes. In boilers, the deposits impair the flow of heat into the water, reducing the heating efficiency and allowing the metal boiler components to overheat.The reciprocating mechanism on the driving wheels of a two-cylinder single expansion steam locomotive tended to pound the rails (see hammer blow), thus requiring more maintenance. Raising steam from coal.

Steam locomotive. took a matter of hours, and created serious pollution problems. Coal-burning locomotives required fire cleaning and ash removal between turns of duty. Diesel or electric locomotives, by comparison, drew benefit from new custom-built servicing facilities. The smoke from steam locomotives was also deemed objectionable; the first electric and diesel locomotives were developed in response to smoke abatement requirements, although this did not take into account the high level of less-visible pollution in diesel exhaust smoke, especially when idling. In some countries, however, power for electric locomotives is derived from steam generated in power stations, which are often run by coal.##.

Steam locomotive. Unknown Warrior" project, GWR "47xx 4709, 2999 "Lady of Legend", 1014 "County of Glamorgan" and 6880 "Betton Grange" projects. These United Kingdom based new build projects are further complemented by the new build Pennsylvania Railroad 5550 project in the United States. One of the group's goals is to surpass the steam locomotive speed record held by the 4468 "Mallard" when the 5550 is completed and for the 5550 to fill in a huge gap in steam locomotive preservation.In 1980, American financier Ross Rowland established American Coal Enterprises to develop a modernised coal-fired steam locomotive. His ACE 3000 concept attracted considerable.

Steam locomotive. same company also rebuilt a German DR Class 52.80 2-10-0 locomotive to new standards with modifications such as roller bearings, light oil firing and boiler insulation.## Climate change.The future use of steam locomotives in the United Kingdom is in doubt because of government policy on climate change. The Heritage Railway Association is working with the All-Party Parliamentary Group on Heritage Rail in an effort to continue running steam locomotives on coal.Many tourist railroads use oil-fired steam locomotives (or have converted their locomotives to run on oil) to reduce their environmental footprint, and because fuel oil can be easier to obtain.

Steam locomotive. than coal of the proper type and sizing for locomotives. For example, the Grand Canyon Railway runs its steam locomotives on used vegetable oil.An organization called the Coalition for Sustainable Rail (CSR) is developing an environmentally friendly coal substitute made from torrefied biomass. In early 2019, they performed a series of tests using Everett Railroad to evaluate the performance of the biofuel, with positive results. The biofuel was found to burn slightly faster and hotter than coal. The goal of the project is primarily to find a sustainable fuel for historic steam locomotives on tourist railroads, but CSR has also.


Question: What is the facet of this object?

Instruction: Determine the Wikipedia snippet that matches the question of this image.

Octagon. In geometry, an octagon (from the Greek ὀκτάγωνον "oktágōnon", "eight angles") is an eight-sided polygon or 8-gon.A "regular octagon" has Schläfli symbol {8} and can also be constructed as a quasiregular truncated square, t{4}, which alternates two types of edges. A truncated octagon, t{8} is a hexadecagon, {16}. A 3D analog of the octagon can be the rhombicuboctahedron with the triangular faces on it like the replaced edges, if one considers the octagon to be a truncated square.## Properties of the general octagon.The sum of all the internal angles of any octagon is 1080°. As with all polygons, the external.

Octagon. angles total 360°.If squares are constructed all internally or all externally on the sides of an octagon, then the midpoints of the segments connecting the centers of opposite squares form a quadrilateral that is both equidiagonal and orthodiagonal (that is, whose diagonals are equal in length and at right angles to each other).The midpoint octagon of a reference octagon has its eight vertices at the midpoints of the sides of the reference octagon. If squares are constructed all internally or all externally on the sides of the midpoint octagon, then the midpoints of the segments connecting the centers of opposite.

Octagon. squares themselves form the vertices of a square.## Regular octagon.A regular octagon is a closed figure with sides of the same length and internal angles of the same size. It has eight lines of reflective symmetry and rotational symmetry of order 8. A regular octagon is represented by the Schläfli symbol {8}.The internal angle at each vertex of a regular octagon is 135° (formula_1 radians). The central angle is 45° (formula_2 radians).## Area.The area of a regular octagon of side length "a" is given byformula_3In terms of the circumradius "R", the area isformula_4In terms of the apothem "r" (see also.

Octagon. inscribed figure), the area isformula_5These last two coefficients bracket the value of pi, the area of the unit circle.The area can also be expressed asformula_6where "S" is the span of the octagon, or the second-shortest diagonal; and "a" is the length of one of the sides, or bases. This is easily proven if one takes an octagon, draws a square around the outside (making sure that four of the eight sides overlap with the four sides of the square) and then takes the corner triangles (these are 45–45–90 triangles) and places them with right angles pointed inward, forming a square.

Octagon. The edges of this square are each the length of the base.Given the length of a side "a", the span "S" isformula_7The span, then, is equal to the "silver ratio" times the side, a.The area is then as above:formula_8Expressed in terms of the span, the area isformula_9Another simple formula for the area is formula_10More often the span "S" is known, and the length of the sides, "a", is to be determined, as when cutting a square piece of material into a regular octagon. From the above,formula_11The two end lengths "e" on each side (the leg lengths of the triangles (green.

Octagon. in the image) truncated from the square), as well as being formula_12 may be calculated asformula_13## Circumradius and inradius.The circumradius of the regular octagon in terms of the side length "a" isformula_14and the inradius isformula_15## Diagonals.The regular octagon, in terms of the side length "a", has three different types of diagonals:Short diagonal;Medium diagonal (also called span or height), which is twice the length of the inradius;Long diagonal, which is twice the length of the circumradius.The formula for each of them follows from the basic principles of geometry. Here are the formulas for their length:Short diagonal: formula_16 ;Medium diagonal: formula_17 ;.

Octagon. ("silver ratio" times a) Long diagonal: formula_18 .## Construction and elementary properties.A regular octagon at a given circumcircle may be constructed as follows:Draw a circle and a diameter AOE, where O is the center and A, E are points on the circumcircle.Draw another diameter GOC, perpendicular to AOE.(Note in passing that A,C,E,G are vertices of a square).Draw the bisectors of the right angles GOA and EOG, making two more diameters HOD and FOB.A,B,C,D,E,F,G,H are the vertices of the octagon.A regular octagon can be constructed using a straightedge and a compass, as 8 = 23, a power of two:The regular octagon.

Octagon. can be constructed with meccano bars. Twelve bars of size 4, three bars of size 5 and two bars of size 6 are required.Each side of a regular octagon subtends half a right angle at the centre of the circle which connects its vertices. Its area can thus be computed as the sum of 8 isosceles triangles, leading to the result:formula_19for an octagon of side "a".## Standard coordinates.The coordinates for the vertices of a regular octagon centered at the origin and with side length 2 are:(±1, ±(1+)) (±(1+), ±1).## Dissection.Coxeter states that every zonogon (a 2"m"-gon whose opposite sides are.

Octagon. parallel and of equal length) can be dissected into "m"("m"-1)/2 parallelograms.In particular this is true for regular polygons with evenly many sides, in which case the parallelograms are all rhombi. For the "regular octagon", "m"=4, and it can be divided into 6 rhombs, with one example shown below. This decomposition can be seen as 6 of 24 faces in a Petrie polygon projection plane of the tesseract. The list defines the number of solutions as 8, by the 8 orientations of this one dissection. These squares and rhombs are used in the Ammann–Beenker tilings.## Skew octagon.A skew octagon is a.

Octagon. skew polygon with 8 vertices and edges but not existing on the same plane. The interior of such an octagon is not generally defined. A "skew zig-zag octagon" has vertices alternating between two parallel planes.A regular skew octagon is vertex-transitive with equal edge lengths. In 3-dimensions it will be a zig-zag skew octagon and can be seen in the vertices and side edges of a square antiprism with the same D4d, [2+,8] symmetry, order 16.## Petrie polygons.The regular skew octagon is the Petrie polygon for these higher-dimensional regular and uniform polytopes, shown in these skew orthogonal projections of in A7,.

Octagon. B4, and D5 Coxeter planes.## Symmetry of octagon.The "regular octagon" has Dih8 symmetry, order 16. There are 3 dihedral subgroups: Dih4, Dih2, and Dih1, and 4 cyclic subgroups: Z8, Z4, Z2, and Z1, the last implying no symmetry.On the regular octagon, there are 11 distinct symmetries. John Conway labels full symmetry as r16. The dihedral symmetries are divided depending on whether they pass through vertices (d for diagonal) or edges (p for perpendiculars) Cyclic symmetries in the middle column are labeled as g for their central gyration orders. Full symmetry of the regular form is r16 and no symmetry is.

Octagon. labeled a1.The most common high symmetry octagons are p8, an isogonal octagon constructed by four mirrors can alternate long and short edges, and d8, an isotoxal octagon constructed with equal edge lengths, but vertices alternating two different internal angles. These two forms are duals of each other and have half the symmetry order of the regular octagon.Each subgroup symmetry allows one or more degrees of freedom for irregular forms. Only the g8 subgroup has no degrees of freedom but can seen as directed edges.## Uses of octagons.The octagonal shape is used as a design element in architecture. The Dome of.


Question: In which year was this item invented or discovered?

Instruction: Determine the Wikipedia snippet that matches the question of this image.

Telephone. A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals that are transmitted via cables and other communication channels to another telephone which reproduces the sound to the receiving user. The term is derived from ("tēle", "far") and φωνή ("phōnē", "voice"), together meaning "distant voice". A common short form of the term is phone, which came into use almost immediately after the first patent was issued.In 1876, Alexander Graham Bell.

Telephone. inventions such as radio, television, the light bulb, and the computer, several inventors pioneered experimental work on "voice transmission over a wire" and improved on each other's ideas. New controversies over the issue still arise from time to time. Charles Bourseul, Antonio Meucci, Johann Philipp Reis, Alexander Graham Bell, and Elisha Gray, amongst others, have all been credited with the invention of the telephone.Alexander Graham Bell was the first to be awarded a patent for the electric telephone by the United States Patent and Trademark Office (USPTO) in March 1876. Before Bell's patent, the telephone transmitted sound in a way.

Telephone. that was similar to the telegraph. This method used vibrations and circuits to send electrical pulses, but was missing key features. Bell found that this method produced a sound through intermittent currents, but in order for the telephone to work a fluctuating current reproduced sounds the best. The fluctuating currents became the basis for the working telephone, creating Bell's patent. That first patent by Bell was the "master patent" of the telephone, from which other patents for electric telephone devices and features flowed. The Bell patents were forensically victorious and commercially decisive.In 1876, shortly after Bell's patent application, Hungarian engineer.

Telephone. that English technicians to whom Mr. Manzetti illustrated his method for transmitting spoken words on the telegraph wire intend to apply said invention in England on several private telegraph lines". However, telephones would not be demonstrated there until 1876, with a set of telephones from Bell. 28 December 1871: Antonio Meucci files patent caveat No. 3335 in the U.S. Patent Office titled "Sound Telegraph", describing communication of voice between two people by wire. A 'patent caveat' was not an invention patent award, but only an unverified notice filed by an individual that he or she intends to file a regular.

Telephone. patent application in the future. 1874: Meucci, after having renewed the caveat for two years does not renew it again, and the caveat lapses. 6 April 1875: Bell's U.S. Patent 161,739 "Transmitters and Receivers for Electric Telegraphs" is granted. This uses multiple vibrating steel reeds in make-break circuits. 11 February 1876: Elisha Gray invents a liquid transmitter for use with the telephone but does not build one. 14 February 1876: Gray files a patent caveat for transmitting the human voice through a telegraphic circuit. 14 February 1876: Alexander Graham Bell applies for the patent "Improvements in Telegraphy", for electromagnetic telephones.

Telephone. using what is now called amplitude modulation (oscillating current and voltage) but which he referred to as "undulating current". 19 February 1876: Gray is notified by the U.S. Patent Office of an interference between his caveat and Bell's patent application. Gray decides to abandon his caveat. 7 March 1876: Bell's U.S. patent 174,465 "Improvement in Telegraphy" is granted, covering "the method of, and apparatus for, transmitting vocal or other sounds telegraphically…by causing electrical undulations, similar in form to the vibrations of the air accompanying the said vocal or other sound." 10 March 1876: The first successful telephone transmission of clear.

Telephone. speech using a liquid transmitter when Bell spoke into his device, "Mr. Watson, come here, I want to see you." and Watson heard each word distinctly. 30 January 1877: Bell's U.S. patent 186,787 is granted for an electromagnetic telephone using permanent magnets, iron diaphragms, and a call bell. 27 April 1877: Edison files for a patent on a carbon (graphite) transmitter. The patent 474,230 was granted 3 May 1892, after a 15-year delay because of litigation. Edison was granted patent 222,390 for a carbon granules transmitter in 1879.## Early commercial instruments.Early telephones were technically diverse. Some used a water microphone,.

Telephone. (MMS) Party line (telephony) Phone hacking Satellite phone SIM card Spamming Telephone keypad Telephone jack and plug Telephone tapping Tip and ring Videophone Brooks, John (1976). "Telephone: The first hundred years". HarperCollins. Casson, Herbert Newton. (1910) "The history of the telephone" online. Coe, Lewis (1995). "The Telephone and Its Several Inventors: A History." Jefferson, NC: McFarland & Co. Evenson, A. Edward (2000). "The Telephone Patent Conspiracy of 1876: The Elisha Gray – Alexander Bell Controversy." Jefferson, NC: McFarland & Co. Fischer, Claude S. (1994) "America calling: A social history of the telephone to 1940" (Univ of California Press, 1994) Huurdeman,.

Telephone. Anton A. (2003). "The Worldwide History of Telecommunications" Hoboken: NJ: Wiley-IEEE Press. John, Richard R. (2010). "Network Nation: Inventing American Telecommunications." Cambridge, MA: Harvard University Press. MacDougall, Robert. "The People's Network: The Political Economy of the Telephone in the Gilded Age." Philadelphia: University of Pennsylvania Press. Mueller, Milton. (1993) "Universal service in telephone history: A reconstruction." "Telecommunications Policy" 17.5 (1993): 352–69. Todd, Kenneth P. (1998), "A Capsule History of the Bell System". American Telephone & Telegraph Company (AT&T). Early U.S. Telephone Industry Data Virtual museum of early telephones The Telephone, 1877 —"Telegraphy" (Bell's first telephone patent)—Alexander Graham Bell US 186,787—"Electric.


Question: What is the closest parent taxonomy of this animal?

Instruction: You have to find a Wikipedia segment that answers the question about the displayed image.

Arctic fox. The Arctic fox (Vulpes lagopus), also known as the white fox, polar fox, or snow fox, is a small fox native to the Arctic regions of the Northern Hemisphere and common throughout the Arctic tundra biome. It is well adapted to living in cold environments, and is best known for its thick, warm fur that is also used as camouflage. It has a large and very fluffy tail. In the wild, most individuals do not live past their first year but some exceptional ones survive up to 11 years. Its body length ranges from 46 to 68 (cm), with a.

Arctic fox. generally rounded body shape to minimize the escape of body heat.The Arctic fox preys on many small creatures such as lemmings, voles, ringed seal pups, fish, waterfowl, and seabirds. It also eats carrion, berries, seaweed, and insects and other small invertebrates. Arctic foxes form monogamous pairs during the breeding season and they stay together to raise their young in complex underground dens. Occasionally, other family members may assist in raising their young. Natural predators of the Arctic fox are golden eagles, Arctic wolves, polar bears, wolverines, red foxes, and grizzly bears.## Behavior.Arctic foxes must endure a temperature difference of up.

Arctic fox. to 90-100 (C-change) between the external environment and their internal core temperature. To prevent heat loss, the Arctic fox curls up tightly tucking its legs and head under its body and behind its furry tail. This position gives the fox the smallest surface area to volume ratio and protects the least insulated areas. Arctic foxes also stay warm by getting out of the wind and residing in their dens. Although the Arctic foxes are active year-round and do not hibernate, they attempt to preserve fat by reducing their locomotor activity. They build up their fat reserves in the autumn, sometimes.

Arctic fox. increasing their body weight by more than 50%. This provides greater insulation during the winter and a source of energy when food is scarce.## Reproduction.In the spring, the Arctic fox's attention switches to reproduction and a home for their potential offspring. They live in large dens in frost-free, slightly raised ground. These are complex systems of tunnels covering as much as 1000 (m2) and are often in eskers, long ridges of sedimentary material deposited in formerly glaciated regions. These dens may be in existence for many decades and are used by many generations of foxes.Arctic foxes tend to select dens.

Arctic fox. that are easily accessible with many entrances, and that are clear from snow and ice making it easier to burrow in. The Arctic fox builds and chooses dens that face southward towards the sun, which makes the den warmer. Arctic foxes prefer large, maze-like dens for predator evasion and a quick escape especially when red foxes are in the area. Natal dens are typically found in rugged terrain, which may provide more protection for the pups. But, the parents will also relocate litters to nearby dens to avoid predators. When red foxes are not in the region, Arctic foxes will.

Arctic fox. use dens that the red fox previously occupied. Shelter quality is more important to the Arctic fox than the proximity of spring prey to a den.The main prey in the tundra are lemmings, which is why the white fox is often called the "lemming fox". The white fox's reproduction rates reflect the lemming population density, which cyclically fluctuates every 3–5 years. When lemmings are abundant, the white fox can give birth to 18 pups, but they often do not reproduce when food is scarce. The "coastal fox" or blue fox lives in an environment where food availability is relatively consistent,.

Arctic fox. and they will have up to 5 pups every year.Breeding usually takes place in April and May, and the gestation period is about 52 days. Litters may contain as many as 25 (the largest litter size in the order Carnivora). The young emerge from the den when 3 to 4 weeks old and are weaned by 9 weeks of age.Arctic foxes are primarily monogamous and both parents will care for the offspring. When predators and prey are abundant, Arctic foxes are more likely to be promiscuous (exhibited in both males and females) and display more complex social structures. Larger packs.

Arctic fox. of foxes consisting of breeding or non-breeding males or females can guard a single territory more proficiently to increase pup survival. When resources are scarce, competition increases and the number of foxes in a territory decreases. On the coasts of Svalbard, the frequency of complex social structures is larger than inland foxes that remain monogamous due to food availability. In Scandinavia, there are more complex social structures compared to other populations due to the presence of the red fox. Also, conservationists are supplying the declining population with supplemental food. One unique case, however, is Iceland where monogamy is the most.

Arctic fox. prevalent. The older offspring (1-year-olds) often remain within their parent's territory even though predators are absent and there are fewer resources, which may indicate kin selection in the fox.## Diet.Arctic foxes generally eat any small animal they can find, including lemmings, voles, other rodents, hares, birds, eggs, fish, and carrion. They scavenge on carcasses left by larger predators such as wolves and polar bears, and in times of scarcity also eat their feces. In areas where they are present, lemmings are their most common prey, and a family of foxes can eat dozens of lemmings each day. In some locations.

Arctic fox. in northern Canada, a high seasonal abundance of migrating birds that breed in the area may provide an important food source. On the coast of Iceland and other islands, their diet consists predominantly of birds. During April and May, the Arctic fox also preys on ringed seal pups when the young animals are confined to a snow den and are relatively helpless. They also consume berries and seaweed, so they may be considered omnivores. This fox is a significant bird-egg predator, consuming eggs of all except the largest tundra bird species. When food is overabundant, the Arctic fox buries (caches).

Arctic fox. the surplus as a reserve.Arctic foxes survive harsh winters and food scarcity by either hoarding food or storing body fat. Fat is deposited subcutaneously and viscerally in Arctic foxes. At the beginning of winter, the foxes have approximately 14740 kJ of energy storage from fat alone. Using the lowest BMR value measured in Arctic foxes, an average sized fox (3.5 (kg)) would need 471 kJ/day during the winter to survive. Arctic foxes can acquire goose eggs (from greater snow geese in Canada) at a rate of 2.7–7.3 eggs/h, and they store 80–97% of them. Scats provide evidence that they eat.

Arctic fox. the eggs during the winter after caching. Isotope analysis shows that eggs can still be eaten after a year, and the metabolizable energy of a stored goose egg only decreases by 11% after 60 days (a fresh egg has about 816 kJ). Researchers have also noted that some eggs stored in the summer are accessed later the following spring prior to reproduction.## Adaptations.The Arctic fox lives in some of the most frigid extremes on the planet, but they do not start to shiver until the temperature drops to -70 (°C). Among its adaptations for survival in the cold is its.

Arctic fox. dense, multilayered pelage, which provides excellent insulation. Additionally, the Arctic fox is the only canid whose foot pads are covered in fur. There are two genetically distinct coat color morphs: white and blue. The white morph has seasonal camouflage, white in winter and brown along the back with light grey around the abdomen in summer. The blue morph is often a dark blue, brown, or grey color year-round. Although the blue allele is dominant over the white allele, 99% of the Arctic fox population is the white morph. Two similar mutations to MC1R cause the blue color and the lack.

Arctic fox. of seasonal color change. The fur of the Arctic fox provides the best insulation of any mammal.The fox has a low surface area to volume ratio, as evidenced by its generally compact body shape, short muzzle and legs, and short, thick ears. Since less of its surface area is exposed to the Arctic cold, less heat escapes from its body.## Sensory modalities.The Arctic fox has a functional hearing range between 125 Hz–16 kHz with a sensitivity that is ≤ 60 dB in air, and an average peak sensitivity of 24 dB at 4 kHz. Overall, the Arctic foxes hearing is.

Arctic fox. less sensitive than the dog and the kit fox. The Arctic fox and the kit fox have a low upper-frequency limit compared to the domestic dog and other carnivores. The Arctic fox can easily hear lemmings burrowing under 4-5 inches of snow. When it has located its prey, it pounces and punches through the snow to catch its prey.The Arctic fox also has a keen sense of smell. They can smell carcasses that are often left by polar bears anywhere from 10 to 40 (km). It is possible that they use their sense of smell to also track down polar.

Arctic fox. bears. Additionally, Arctic foxes can smell and find frozen lemmings under 46 – 77 (cm) of snow, and can detect a subnivean seal lair under 150 (cm) of snow.## Physiology.The Arctic fox contains advantageous genes to overcome extreme cold and starvation periods. Transcriptome sequencing has identified two genes that are under positive selection: Glycolipid transfer protein domain containing 1 (GLTPD1) and V-akt murine thymoma viral oncogene homolog 2 (AKT2). GLTPD1 is involved in the fatty acid metabolism, while AKT2 pertains to the glucose metabolism and insulin signaling.The average mass specific BMR and total BMR are 37% and 27% lower in.

Arctic fox. the winter than the summer. The Arctic fox decreases its BMR via metabolic depression in the winter to conserve fat storage and minimize energy requirements. According to the most recent data, the lower critical temperature of the Arctic fox is at −7 (C) in the winter and 5 (C) in the summer. It was commonly believed that the Arctic fox had a lower critical temperature below −40 (C). However, some scientists have concluded that this statistic is not accurate since it was never tested using the proper equipment.About 22% of the total body surface area of the Arctic fox dissipates.

Arctic fox. heat readily compared to red foxes at 33%. The regions that have the greatest heat loss are the nose, ears, legs, and feet, which is useful in the summer for thermal heat regulation. Also, the Arctic fox has a beneficial mechanism in their nose for evaporative cooling like dogs, which keeps the brain cool during the summer and exercise. The thermal conductivity of Arctic fox fur in the summer and winter is the same; however, the thermal conductance of the Arctic fox in the winter is lower than the summer since fur thickness increases by 140%. In the summer, the.

Arctic fox. thermal conductance of the Arctic foxes body is 114% higher than the winter, but their body core temperature is constant year-round.One way that Arctic foxes regulate their body temperature is by utilizing a countercurrent heat exchange in the blood of their legs. Arctic foxes can constantly keep their feet above the tissue freezing point (−1 (C)) when standing on cold substrates without losing mobility or feeling pain. They do this by increasing vasodilation and blood flow to a capillary rete in the pad surface, which is in direct contact with the snow rather than the entire foot. They selectively vasoconstrict.

Arctic fox. blood vessels in the center of the foot pad, which conserves energy and minimizes heat loss. Arctic foxes maintain the temperature in their paws independently from the core temperature. If the core temperature drops, the pad of the foot will remain constantly above the tissue freezing point.## Size.The average head-and-body length of the male is 55 (cm), with a range of 46 to 68 (cm), while the female averages 52 (cm) with a range of 41 to 55 (cm). In some regions, no difference in size is seen between males and females. The tail is about 30 (cm) long in.

Arctic fox. both sexes. The height at the shoulder is 25 to 30 (cm). On average males weigh 3.5 (kg), with a range of 3.2 to 9.4 (kg), while females average 2.9 (kg), with a range of 1.4 to 3.2 (kg).## Taxonomy."Vulpes lagopus" is a 'true fox' belonging to the genus "Vulpes" of the fox tribe Vulpini, which consists of 12 extant species. It is classified under the subfamily Caninae of the canid family Canidae. Although it has previously been assigned to its own monotypic genus "Alopex", recent genetic evidence now places it in the genus "Vulpes" along with the majority of.

Arctic fox. other foxes.It was originally described by Carl Linnaeus in the 10th edition of "Systema Naturae" in 1758 as "Canis lagopus". The type specimen was recovered from Lapland, Sweden. The generic name "vulpes" is Latin for "fox". The specific name "lagopus" is derived from Ancient Greek λαγώς ("lagōs", "hare") and πούς ("pous", "foot"), referring to the hair on its feet similar to those found in cold-climate species of hares.Looking at the most recent phylogeny, the Arctic fox and the red fox ("Vulpes vulpes") diverged approximately 3.17MYA. Additionally, the Arctic fox diverged from its sister group, the kit fox ("Vulpes macrotis"), at.

Arctic fox. about 0.9MYA.## Origins.The origins of the Arctic fox have been described by the "out of Tibet" hypothesis. On the Tibetan Plateau, fossils of the extinct ancestral Arctic fox ("Vulpes qiuzhudingi") from the early Pliocene (5.08–3.6 MYA) were found along with many other precursors of modern mammals that evolved during the Pliocene (5.3–2.6 MYA). It is believed that this ancient fox is the ancestor of the modern Arctic fox. Globally, the Pliocene was about 2–3 °C warmer than today, and the Arctic during the summer in the mid-Pliocene was 8 °C warmer. By using stable carbon and oxygen isotope analysis of.

Arctic fox. fossils, researchers claim that the Tibetan Plateau experienced tundra-like conditions during the Pliocene and harbored cold-adapted mammals that later spread to North America and Eurasia during the Pleistocene Epoch (2.6 million-11,700 years ago).## Subspecies.Besides the nominate subspecies, the common Arctic fox, "V. l. lagopus", four other subspecies of this fox have been described: Bering Islands Arctic fox, "V. l. beringensis" Greenland Arctic fox, "V. l. foragoapusis" Iceland Arctic fox, "V. l. fuliginosus" Pribilof Islands Arctic fox, "V. l. pribilofensis"## Distribution and habitat.The Arctic fox has a circumpolar distribution and occurs in Arctic tundra habitats in northern Europe, northern Asia, and.

Arctic fox. North America. Its range includes Greenland, Iceland, Fennoscandia, Svalbard, Jan Mayen (where it was hunted to extinction) and other islands in the Barents Sea, northern Russia, islands in the Bering Sea, Alaska, and Canada as far south as Hudson Bay. In the late 19th century, it was introduced into the Aleutian Islands southwest of Alaska. However, the population on the Aleutian Islands is currently being eradicated in conservation efforts to preserve the local bird population. It mostly inhabits tundra and pack ice, but is also present in Canadian boreal forests (northeastern Alberta, northern Saskatchewan, northern Manitoba, Northern Ontario, Northern Quebec,.

Arctic fox. and Newfoundland and Labrador) and the Kenai Peninsula in Alaska. They are found at elevations up to 3000 (m) above sea level and have been seen on sea ice close to the North Pole.The Arctic fox is the only land mammal native to Iceland. It came to the isolated North Atlantic island at the end of the last ice age, walking over the frozen sea. The Arctic Fox Center in Súðavík contains an exhibition on the Arctic fox and conducts studies on the influence of tourism on the population. Its range during the last ice age was much more extensive.

Arctic fox. than it is now, and fossil remains of the Arctic fox have been found over much of northern Europe and Siberia.The color of the fox's coat also determines where they are most likely to be found. The white morph mainly lives inland and blends in with the snowy tundra, while the blue morph occupies the coasts because its dark color blends in with the cliffs and rocks.## Migrations and travel.During the winter, 95.5% of Arctic foxes utilize commuting trips, which remain within the fox's home range. Commuting trips in Arctic foxes last less than 3 days and occur between 0–2.9.

Arctic fox. times a month. Nomadism is found in 3.4% of the foxes, and loop migrations (where the fox travels to a new range, then returns to its home range) are the least common at 1.1%. Arctic foxes in Canada that undergo nomadism and migrations voyage from the Canadian archipelago to Greenland and northwestern Canada. The duration and distance traveled between males and females is not significantly different.Arctic foxes closer to goose colonies (located at the coasts) are less likely to migrate. Meanwhile, foxes experiencing low-density lemming populations are more likely to make sea ice trips. Residency is common in the Arctic.

Arctic fox. fox population so that they can maintain their territories. Migratory foxes have a mortality rate >3 times higher than resident foxes. Nomadic behavior becomes more common as the foxes age.In July 2019, the Norwegian Polar Institute reported the story of a yearling female which was fitted with a GPS tracking device and then released by their researchers on the east coast of Spitsbergen in the Svalbard group of islands. The young fox crossed the polar ice from the islands to Greenland in 21 days, a distance of 1,512 (km). She then moved on to Ellesmere Island in northern Canada, covering.

Arctic fox. a total recorded distance of 3,506 (km) in 76 days, before her GPS tracker stopped working. She averaged just over 46 (km) a day, and managed as much as 155 (km) in a single day.## Conservation status.The Arctic fox has been assessed as least concern on the IUCN Red List since 2004. However, the Scandinavian mainland population is acutely endangered, despite being legally protected from hunting and persecution for several decades. The estimate of the adult population in all of Norway, Sweden, and Finland is fewer than 200 individuals. Of these, especially in Finland, the Arctic fox is even classified.

Arctic fox. as critically endangered, because even though the animal was pacified in Finland since 1940, the population has not recovered despite that. As a result, the populations of Arctic fox have been carefully studied and inventoried in places such as the Vindelfjällens Nature Reserve (Sweden), which has the Arctic fox as its symbol.The abundance of the Arctic fox tends to fluctuate in a cycle along with the population of lemmings and voles (a 3- to 4-year cycle). The populations are especially vulnerable during the years when the prey population crashes, and uncontrolled trapping has almost eradicated two subpopulations.The pelts of Arctic.

Arctic fox. foxes with a slate-blue coloration were especially valuable. They were transported to various previously fox-free Aleutian Islands during the 1920s. The program was successful in terms of increasing the population of blue foxes, but their predation of Aleutian Canada geese conflicted with the goal of preserving that species.The Arctic fox is losing ground to the larger red fox. This has been attributed to climate change—the camouflage value of its lighter coat decreases with less snow cover. Red foxes dominate where their ranges begin to overlap by killing Arctic foxes and their kits. An alternative explanation of the red fox's gains.

Arctic fox. involves the gray wolf. Historically, it has kept red fox numbers down, but as the wolf has been hunted to near extinction in much of its former range, the red fox population has grown larger, and it has taken over the niche of top predator. In areas of northern Europe, programs are in place that allow the hunting of red foxes in the Arctic fox's previous range.As with many other game species, the best sources of historical and large-scale population data are hunting bag records and questionnaires. Several potential sources of error occur in such data collections. In addition, numbers.

Arctic fox. vary widely between years due to the large population fluctuations. However, the total population of the Arctic fox must be in the order of several hundred thousand animals.The world population of Arctic foxes is thus not endangered, but two Arctic fox subpopulations are. One is on Medny Island (Commander Islands, Russia), which was reduced by some 85–90%, to around 90 animals, as a result of mange caused by an ear tick introduced by dogs in the 1970s. The population is currently under treatment with antiparasitic drugs, but the result is still uncertain.The other threatened population is the one in Fennoscandia.

Arctic fox. (Norway, Sweden, Finland, and Kola Peninsula). This population decreased drastically around the start of the 20th century as a result of extreme fur prices, which caused severe hunting also during population lows. The population has remained at a low density for more than 90 years, with additional reductions during the last decade. The total population estimate for 1997 is around 60 adults in Sweden, 11 adults in Finland, and 50 in Norway. From Kola, there are indications of a similar situation, suggesting a population of around 20 adults. The Fennoscandian population thus numbers around 140 breeding adults. Even after local.

Arctic fox. lemming peaks, the Arctic fox population tends to collapse back to levels dangerously close to nonviability.The Arctic fox is classed as a "prohibited new organism" under New Zealand's Hazardous Substances and New Organisms Act 1996, preventing it from being imported into the country. Arctic rabies virus Nowak, Ronald M. (2005). "Walker's Carnivores of the World". Baltimore: Johns Hopkins Press. . State of the Environment Norway: Arctic fox Smithsonian Institution – North American Mammals: Vulpes lagopus Photo Gallery by islandsmyndir.is.


Question: What is the source of energy of this facility?

Instruction: I want to find a paragraph from Wikipedia that answers my question about this image.

Photovoltaic system. A photovoltaic system, also PV system or solar power system, is an electric power system designed to supply usable solar power by means of photovoltaics. It consists of an arrangement of several components, including solar panels to absorb and convert sunlight into electricity, a solar inverter to convert the output from direct to alternating current, as well as mounting, cabling, and other electrical accessories to set up a working system. It may also use a solar tracking system to improve the system's overall performance and include an integrated battery. PV systems convert light directly into electricity, and are not to.

Photovoltaic system. be confused with other solar technologies, such as concentrated solar power or solar thermal, used for heating and cooling. A solar array only encompasses the ensemble of solar panels, the visible part of the PV system, and does not include all the other hardware, often summarized as balance of system (BOS). PV systems range from small, rooftop-mounted or building-integrated systems with capacities from a few to several tens of kilowatts, to large utility-scale power stations of hundreds of megawatts. Nowadays, most PV systems are grid-connected, while off-grid or stand-alone systems account for a small portion of the market.Operating silently and.

Photovoltaic system. systems, building-integrated vs. rack-mounted systems, residential vs. utility systems, distributed vs. centralized systems, rooftop vs. ground-mounted systems, tracking vs. fixed-tilt systems, and new constructed vs. retrofitted systems. Other distinctions may include, systems with microinverters vs. central inverter, systems using crystalline silicon vs. thin-film technology, and systems with modules.About 99 percent of all European and 90 percent of all U.S. solar power systems are connected to the electrical grid, while off-grid systems are somewhat more common in Australia and South Korea. PV systems rarely use battery storage. This may change, as government incentives for distributed energy storage are implemented and investments.

Photovoltaic system. in storage solutions gradually become economically viable for small systems. A typical residential solar array is rack-mounted on the roof, rather than integrated into the roof or facade of the building, which is significantly more expensive. Utility-scale solar power stations are ground-mounted, with fixed tilted solar panels rather than using expensive tracking devices. Crystalline silicon is the predominant material used in 90 percent of worldwide produced solar modules, while its rival thin-film has lost market-share. About 70 percent of all solar cells and modules are produced in China and Taiwan, only 5 percent by European and US-manufacturers. The installed capacity.

Photovoltaic system. for both small rooftop systems and large solar power stations is growing rapidly and in equal parts, although there is a notable trend towards utility-scale systems, as the focus on new installations is shifting away from Europe to sunnier regions, such as the Sunbelt in the U.S., which are less opposed to ground-mounted solar farms and cost-effectiveness is more emphasized by investors.Driven by advances in technology and increases in manufacturing scale and sophistication, the cost of photovoltaics is declining continuously. There are several million PV systems distributed all over the world, mostly in Europe, with 1.4 million systems in Germany.

Photovoltaic system. The International Energy Agency expects solar power to become the world's largest source of electricity by 2050, with solar photovoltaics and concentrated solar thermal contributing 16% and 11% to the global demand, respectively.## Solar grid-connection.A grid connected system is connected to a larger independent grid (typically the public electricity grid) and feeds energy directly into the grid. This energy may be shared by a residential or commercial building before or after the revenue measurement point, depending on whether the credited energy production is calculated independently of the customer's energy consumption (feed-in tariff) or only on the difference of energy (net.

Photovoltaic system. metering). These systems vary in size from residential (2–10 kWp) to solar power stations (up to 10s of MWp). This is a form of decentralized electricity generation. Feeding electricity into the grid requires the transformation of DC into AC by a special, synchronising grid-tie inverter. In kilowatt-sized installations the DC side system voltage is as high as permitted (typically 1000 V except US residential 600 V) to limit ohmic losses. Most modules (60 or 72 crystalline silicon cells) generate 160 W to 300 W at 36 volts. It is sometimes necessary or desirable to connect the modules partially in parallel.

Photovoltaic system. direct and angled light, somewhat reducing the benefit of tracking.Trackers and sensors to optimise the performance are often seen as optional, but they can increase viable output by up to 45%. Arrays that approach or exceed one megawatt often use solar trackers. Considering clouds, and the fact that most of the world is not on the equator, and that the sun sets in the evening, the correct measure of solar power is insolation – the average number of kilowatt-hours per square meter per day. For the weather and latitudes of the United States and Europe, typical insolation ranges from 2.26.

Photovoltaic system. be used. Many meters accumulate bidirectionally, some systems use two meters, but a unidirectional meter (with detent) will not accumulate energy from any resultant feed into the grid. In some countries, for installations over 30 kWp a frequency and a voltage monitor with disconnection of all phases is required. This is done where more solar power is being generated than can be accommodated by the utility, and the excess can not either be exported or stored. Grid operators historically have needed to provide transmission lines and generation capacity. Now they need to also provide storage. This is normally hydro-storage, but.

Photovoltaic system. large systems, although this is more commonly done with wind power than solar power, and results in a substantial loss of revenue. Three-phase inverters have the unique option of supplying reactive power which can be advantageous in matching load requirements.Photovoltaic systems need to be monitored to detect breakdown and optimize operation. There are several photovoltaic monitoring strategies depending on the output of the installation and its nature. Monitoring can be performed on site or remotely. It can measure production only, retrieve all the data from the inverter or retrieve all of the data from the communicating equipment (probes, meters, etc.).

Photovoltaic system. concentrating sunlight up to 400 times or more, with efficiencies of 24–28 percent, exceeding those of regular systems. Various designs of systems are commercially available but not very common. However, ongoing research and development is taking place.CPV is often confused with CSP (concentrated solar power) that does not use photovoltaics. Both technologies favor locations that receive much sunlight and directly compete with each other.## Hybrid.A hybrid system combines PV with other forms of generation, usually a diesel generator. Biogas is also used. The other form of generation may be a type able to modulate power output as a function of.

Photovoltaic system. photovoltaic thermal hybrid" (CPVT) system is similar to a PVT system. It uses concentrated photovoltaics (CPV) instead of conventional PV technology, and combines it with a solar thermal collector. CPV/CSP system is a proposed novel solar hybrid system, combining concentrator photovoltaics with the non-PV technology of concentrated solar power (CSP), or also known as concentrated solar thermal. PV diesel system combines a photovoltaic system with a diesel generator. Combinations with other renewables are possible and include wind turbines.## Floating solar arrays.Floating solar arrays are PV systems that float on--or are built over--the surface of drinking water reservoirs, quarry lakes, irrigation.

Photovoltaic system. saved 0.75 (acre) that would have been required for a land-based system. Another benefit of a floatovoltaic system is that the panels are kept at a cooler temperature than they would be on land, leading to a higher efficiency of solar energy conversion. The floating PV array also reduces the amount of water lost through evaporation and inhibits the growth of algae.Utility-scale floating PV farms are starting to be built. The multinational electronics and ceramics manufacturer Kyocera will develop the world's largest, a 13.4 MW farm on the reservoir above Yamakura Dam in Chiba Prefecture using 50,000 solar panels. Salt-water.


Question: What is the conservation status of this animal? (The status is assigned by the international union for conservation of nature. Choose one among Endangered,Least Concern,Critically Endangered,extinct species,extinct in the wild,Vulnerable,Near Threatened,Data Deficient).

Instruction: You have to find a Wikipedia segment that answers the question about the displayed image.

Sea otter. bites, raising concerns that the population had reached a plateau. However, the population increased markedly from 2015 to 2016, with the United States Geological Survey (USGS) California sea otter survey 3-year average reaching 3,272 in 2016, the first time it exceeded the threshold for delisting from the Endangered Species Act (ESA). If populations continued to grow and ESA delisting occurred, southern sea otters would still be fully protected by state regulations and the Marine Mammal Protection Act, which set higher thresholds for protection, at approximately 8,400 individuals. However, ESA delisting seems unlikely due to a precipitous population decline recorded in.


Question: What is the closest parent taxonomy of this bird?

Instruction: Determine the Wikipedia snippet that matches the question of this image.

Clark's nutcracker. Clark's nutcracker ("Nucifraga columbiana"), sometimes referred to as Clark's crow or woodpecker crow, is a passerine bird in the family Corvidae, native to the mountains of western North America. The nutcracker is an omnivore, but subsists mainly on pine nuts, burying seeds in the ground in the summer and then retrieving them in the winter by memory.## Etymology and history.The bird was described by the Lewis and Clark Expedition, with William Clark first observing it in 1805 along the banks of the Salmon River, a tributary of the Columbia River. Its scientific name literally means "nutcracker of the Columbia." Lewis.

Clark's nutcracker. recorded a more detailed description in 1806. A skin collected by the expedition was obtained by the ornithologist Alexander Wilson, who used it to produce an engraving for his monumental "American Ornithology".## Taxonomy.Originally placed in the genus "Corvus" by Lewis, Clark's nutcracker was later included in "Nucifraga" by Wilson, which also includes two Old World species with similar lifestyles and habitats.## Distribution and habitat.This species is present in western North America from British Columbia and western Alberta in the north to Baja California and central New Mexico in the south. There is also a small isolated population on the peak.

Clark's nutcracker. of Cerro Potosí, elevation 3,700 metres (12,200 ft), in Nuevo León, northeast Mexico. It is mainly found in mountains at altitudes of 900–3,900 metres (3,000–12,900 ft) in conifer forest. It is not migratory except in the sense of moving back and forth locally between areas of higher and lower elevation. Outside the breeding season, it may wander extensively to lower altitudes and also further east as far as Illinois (and exceptionally, Pennsylvania), particularly following any cone crop failure in its normal areas.## Description."Nucifraga columbiana" can reach an average length of 28.8 (cm). It is slightly smaller than its Eurasian relative.

Clark's nutcracker. the spotted nutcracker ("N. caryocatactes"). Most of its body has feathers that are ashy-grey and loose in texture. The wings and tail are black and white. The central tail feathers are black and the outer ones white. The bill, legs and feet are also black. The bill is long, stout, and cone-shaped.Measurements: Length: 10.6-11.8 in (27-30 cm) Weight: 3.7-5.7 oz (106-161 g) Wingspan: 24 in (61 cm)## Food.The most important food resources for this species are the seeds of pines ("Pinus" sp.), principally the two cold-climate (high altitude) species of white pine ("Pinus" subgenus "Strobus") with large seeds "P. albicaulis.

Clark's nutcracker. and "P. flexilis", but also using other high-altitude species like "P. balfouriana, P. longaeva" and "P. monticola". During migrations to lower altitudes, it also extensively uses the seeds of pinyon pines. The isolated Cerro Potosí population is strongly associated with the local endemic Potosi pinyon "Pinus culminicola". All Clark's Nutcrackers have a sublingual pouch capable of holding around 50–150 seeds, depending on the size of the seeds; the pouch greatly enhances the birds' ability to transport and store seeds.Clark's nutcrackers store seeds, usually in the ground for later consumption, in caches of 1–15 seeds (average of 3–4 seeds). Depending on.

Clark's nutcracker. the cone crop as well as the tree species, a single Clark's nutcracker can cache as many as 98,000 seeds per season. The birds regularly store more than they actually need as insurance against seed theft by other animals (squirrels, etc.), as well as low availability of alternative foods; this surplus seed is left in the cache, and may be able to germinate and grow into new trees, if the conditions are right. Through this activity of caching and over-storing, the bird is perpetuating its own habitat. Closely tied in with this storage behavior is the bird's remarkable long-term spatial.

Clark's nutcracker. memory; they are able to relocate caches of seeds with great accuracy, even nine months later, and even when the cache sites are buried under up to a meter (3 ft) of snow. Its powers of memory exemplify the high intelligence of the Corvidae. Clark's nutcrackers are known for storing a recovering large numbers of seed catches that are critical for winter survival. Short-term memory tasks reveal that nutcrackers can remember spatial information better than visual information. It was demonstrated that the catch recovery ability of Clarks nutcracker is derived from a memory system that has evolved differently for storing.

Clark's nutcracker. spatial information. The diet also includes a wide range of insect prey, berries and other fruits, small mammals and occasionally flesh from carcasses. Eggs and nestlings are sometimes devoured, and peanuts and suet have become a favorite at bird tables. Food is taken both from the ground and from trees, where the nutcrackers are very agile among the branches. The birds are able to extract food by clasping pine cones in such a way that the cones are held between one or both feet. The birds then hack the cones open with their strong bills. Rotten logs are also hacked.

Clark's nutcracker. into in order to locate large beetle grubs, and animal dung may be flipped over in search of insects. Clark's nutcrackers can also be opportunistic feeders in developed areas, and are known to some as "camp robbers".## Nesting.The species usually nests in pines or other types of conifers during early spring. Two to four eggs are laid, incubation usually occurring in 16–18 days. Incubation is performed by both the male and female parents, and both the male and the female develop brood patches. The young are typically fledged by around the 22nd day. The fledglings follow their parents around for.

Clark's nutcracker. several months, possibly in order to learn the complex seed storage behavior.## Whitebark pine mutualism.Clark's nutcracker is the primary seed disperser for whitebark pine ("Pinus albicaulis"). Whitebark pine is in decline throughout its range, due to infection by white pine blister rust ("Cronartium ribicola"), widespread outbreaks of mountain pine beetle, and the long-term effects of fire suppression. The Clark's nutcracker is an integral part of the whitebark pine restoration process: the Clark's nutcracker must remain in whitebark pine forests and cache the seeds in excess, so that healthy trees will continue to grow. If whitebark pine declines into extinction, the.

Clark's nutcracker. Clark's nutcracker will lose an important source of food and may no longer be seen in areas where the tree is the primary source of seed, such as Glacier National Park.## Vocalization.The voice of this bird is extremely varied and produces many different sounds. However, the most frequent call is commonly described as "". Lanner, R. M. (1996). "Made for each other: a symbiosis of birds and pines". OUP. Balda R., Kamil C., Linking Life Zones, Life History Traits, Ecology, and Spatial Cognition in Four Allopatric Southwestern Seed Caching Corvids, 2006 NatureServe reportClark's nutcracker photo gallery VIREO Clark's nutcracker on.

Clark's nutcracker. the Internet Bird CollectionClark's nutcracker at All About BirdsWhitebark Pine Ecosystem Foundation.


Question: What is the conservation status of this plant? (The status is assigned by the international union for conservation of nature. Choose one among Endangered,Least Concern,Critically Endangered,extinct species,extinct in the wild,Vulnerable,Near Threatened,Data Deficient).

Instruction: Determine the Wikipedia snippet that matches the question of this image.

Longan. be listed as Vulnerable on the IUCN Red List. If left alone, longan tree stumps will resprout and the listing was upgraded to Near Threatened in 1998. Recent field data are inadequate for a contemporary IUCN assessment.## History.The longan is believed to originate from the mountain range between Myanmar and southern China. Other reported origins include India, Sri Lanka, upper Myanmar, north Thailand, Kampuchea (more commonly known as Cambodia), north Vietnam and New Guinea.Its earliest record of existence draws back to the Han dynasty in 200 BC. The emperor had demanded lychee and longan trees to be planted in his.


Question: What type of wing is designed for this object?

Instruction: You have to find a Wikipedia segment that answers the question about the displayed image.

Airplane. An airplane or aeroplane (informally plane) is a fixed-wing aircraft that is propelled forward by thrust from a jet engine, propeller, or rocket engine. Airplanes come in a variety of sizes, shapes, and wing configurations. The broad spectrum of uses for airplanes includes recreation, transportation of goods and people, military, and research. Worldwide, commercial aviation transports more than four billion passengers annually on airliners and transports more than 200 billion tonne-kilometers of cargo annually, which is less than 1% of the world's cargo movement. Most airplanes are flown by a pilot on board the aircraft, but some are designed to.

Airplane. and either Latin "planus", "level", or Greek πλάνος ("planos"), "wandering". "Aéroplane" originally referred just to the wing, as it is a plane moving through the air. In an example of synecdoche, the word for the wing came to refer to the entire aircraft.In the United States and Canada, the term "airplane" is used for powered fixed-wing aircraft. In the United Kingdom and Ireland and most of the Commonwealth, the term "aeroplane" () is usually applied to these aircraft.## History.## Antecedents.Many stories from antiquity involve flight, such as the Greek legend of Icarus and Daedalus, and the Vimana in ancient Indian.

Airplane. of Birds" (1502), noting for the first time the distinction between the center of mass and the center of pressure of flying birds.In 1799, George Cayley set forth the concept of the modern airplane as a fixed-wing flying machine with separate systems for lift, propulsion, and control. Cayley was building and flying models of fixed-wing aircraft as early as 1803, and he built a successful passenger-carrying glider in 1853. In 1856, Frenchman Jean-Marie Le Bris made the first powered flight, by having his glider "L'Albatros artificiel" pulled by a horse on a beach. Then the Russian Alexander F. Mozhaisky also.

Airplane. subsequently abandoned work on it.In the 1890s, Lawrence Hargrave conducted research on wing structures and developed a box kite that lifted the weight of a man. His box kite designs were widely adopted. Although he also developed a type of rotary aircraft engine, he did not create and fly a powered fixed-wing aircraft.Between 1867 and 1896, the German pioneer of human aviation Otto Lilienthal developed heavier-than-air flight. He was the first person to make well-documented, repeated, successful gliding flights. Lilienthal's work led to him developing the concept of the modern wing, his flight attempts in 1891 are seen as the.

Airplane. rigorously inspected to search for imperfections and defects. After approval by inspectors, the plane is put through a series of flight tests to assure that all systems are working correctly and that the plane handles properly. Upon passing these tests, the plane is ready to receive the "final touchups" (internal configuration, painting, etc.), and is then ready for the customer.## Characteristics.## Airframe.The structural parts of a fixed-wing aircraft are called the airframe. The parts present can vary according to the aircraft's type and purpose. Early types were usually made of wood with fabric wing surfaces, When engines became available for.

Airplane. to stabilize the plane's pitch (tilt up or down) and mounts the elevators, which provide pitch control. "Landing gear", a set of wheels, skids, or floats that support the plane while it is on the surface. On seaplanes, the bottom of the fuselage or floats (pontoons) support it while on the water. On some planes the landing gear retracts during flight to reduce drag.## Wings.The wings of a fixed-wing aircraft are static planes extending either side of the aircraft. When the aircraft travels forwards, air flows over the wings, which are shaped to create lift. This shape is called an.

Airplane. airfoil and is shaped like a bird's wing.## Wing structure.Airplanes have flexible wing surfaces which are stretched across a frame and made rigid by the lift forces exerted by the airflow over them. Larger aircraft have rigid wing surfaces which provide additional strength.Whether flexible or rigid, most wings have a strong frame to give them their shape and to transfer lift from the wing surface to the rest of the aircraft. The main structural elements are one or more spars running from root to tip, and many ribs running from the leading (front) to the trailing (rear) edge.Early airplane engines.

Airplane. control, most fixed-wing types have an empennage comprising a fin and rudder which act horizontally and a tailplane and elevator which act vertically. These control surfaces can typically be trimmed to relieve control forces for various stages of flight. This is so common that it is known as the conventional layout. Sometimes there may be two or more fins, spaced out along the tailplane.Some types have a horizontal "canard" foreplane ahead of the main wing, instead of behind it. This foreplane may contribute to the lift, the trim, or control of the aircraft, or to several of these.## Controls and.


Question: Who commissioned this building?

Instruction: I want to find a paragraph from Wikipedia that answers my question about this image.

Gate of All Nations. The Gate of All Nations (Old Persian: "duvarthim visadahyum") also known as the Gate of Xerxes, is located in the ruins of the ancient city of Persepolis, Iran.The construction of the Stairs of All Nations and the Gate of All Nations was ordered by the Achaemenid king Xerxes I (486-465 BC), the successor of the founder of Persepolis, Darius I the Great.## Building.The structure consisted of one large room whose roof was supported by four stone columns with bell-shaped bases. Parallel to the inner walls of this room ran a stone bench, interrupted at the doorways. The outside walls, made.


Question: Which place is this plant endemic to?

Instruction: You have to find a Wikipedia segment that answers the question about the displayed image.

Rhopalostylis sapida. Rhopalostylis sapida, commonly known as nīkau (), is a palm tree endemic to New Zealand, and the only palm native to mainland New Zealand.## Etymology. is a Māori word; in the closely related Eastern Polynesian languages of the tropical Pacific, it refers to the fronds or the midrib of the coconut palm.## Distribution.The nīkau palm is the only palm species endemic to mainland New Zealand. Its natural range is coastal and lowland forest on the North Island, and on the South Island as far south as Okarito (43°20′S) in the west and Banks Peninsula (43°5′S) in the east. It also.

Rhopalostylis sapida. occurs on Chatham Island and Pitt Island/Rangiauria to the south-east of New Zealand, where it is the world's southernmost palm at 44° 18'S latitude.Nīkau grow up to 15 m tall, with a stout, green trunk which bears grey-green leaf scars. The trunk is topped by a smooth, bulging crownshaft up to 1 m long. The fronds are up to 3 m long, and the closely set, sometimes overlapping leaflets are up to 1m long. The inflorescence is multibranched and from 20 to 40 cm long. The tightly packed flowers are unisexual and coloured lilac to pink. Male flowers are borne.

Rhopalostylis sapida. degrees of frost, but are damaged even more severely by sudden large drops in temperature even above freezing. Nīkau grow well in areas with a mild Mediterranean climate.## Variation.The nīkau palm shows considerable variation in the wild. Plants from the South Island and the offshore islands of the North Island have larger, more-gracefully-arching fronds and are popular in cultivation. The Chatham Islands form is particularly different, having a distinct juvenile form and larger fruits, and a thicker covering of fine hairs on the fronds. More research is needed into its precise relationship with the mainland form. The New Zealand nīkau.