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

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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 installed power capacity of this in megawatt?

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Battersea Power Station. Council.## Planning consent.The Council gave planning consent on 11 November 2010. REO hoped for construction to begin in 2011, but this has now been cancelled. The station structure itself was expected to be repaired and secure by 2016, with completion of the whole project by 2020. Plans now include the construction of 3,400 apartments and 3500000 (sqft) of office space. Approximately 28,000 inhabitants and 25,000 workers are expected to occupy the space once complete.## Lenders allow more time.Reuters reported on 1 September 2011 that lenders would allow more time for a new equity partner to be found:Lenders to the owner.

Battersea Power Station. with the Northern line extension and its new Battersea Power Station terminus completed in 2021. Circus West Village now has over 1500 residents and over 23 restaurants, cafes and retailers now open.WilkinsonEyre was appointed in 2013 to carry out the restoration of the Grade II* listed Power Station. Work commenced in 2013 and plans included the restoration of the art deco structure internally and externally, reconstruction of the chimneys, and refurbishment of the historic cranes and jetty as a new river taxi stop. Restoration work on the power station's chimneys was completed in 2017. In 2019, the jetty in front.

Battersea Power Station. provide "the gateway to the entire development and the new Northern line extension".## London Underground extension.The London Underground's Northern line has been extended to serve Nine Elms and the power station, branching off at Kennington station. Two stations, Nine Elms station and Battersea Power Station station, opened on 20 September 2021. The construction cost £1.1 billion and is 3 (km) long.## Apple.In September 2016, Apple announced plans to consolidate 1,400 London employees, from seven locations, at the station by 2021, occupying around 500,000 square feet of the power station building as its new London headquarters. The move was later delayed.


Question: What is the closest upper taxonomy of this insect?

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Phalangium opilio. Phalangium opilio is a species of harvestman belonging to the family Phalangiidae.## Distribution.It is "the most widespread species of harvestman in the world", occurring natively in Europe, and much of Asia. The species has been introduced to North America, North Africa and New Zealand.## Habitat.This species can be found in a wide range of habitats, including meadows, bogs, forests, and various types of anthropogenic habitats, such as gardens, fields, hedgerows, lawns, quarries, green places in built-up areas, walls and bridges.## Description.Females have a body length of 6 – 9 (mm), males are slightly smaller at 4 – 7 (mm). Males.

Phalangium opilio. however have longer legs; the second leg is about 54 (mm) in males and 38 (mm) in females. Males and females are similarly coloured and marked, although males' markings tend to be less clear. The body has a three-lobed darker "saddle", usually with spots or dashes in the midline. Both sexes show many tubercules with small spikes on the anterior surface of their body."Mitopus morio" has a very similar appearance, but "P. opilio" can be distinguished by the two pale "denticles" (small teeth-like structures) below the anterior margin of the carapace. Males have long forward-pointing "horns" on the second segment.

Phalangium opilio. of their chelicerae.## Biology."Phalangium opilio" is normally an univoltine species and overwinters as eggs. Eggs are laid in moist areas and hatch in three-five months. The immatures undergo several molts and reach maturity in two-three months. These harvestmans usually feed on soft-bodied animals such as aphids, caterpillars, leafhoppers, beetle larvae, mites, but sometime it may scavenge on hard-bodied animals such as various arthropods. They are also known to feed on "Helicoverpa zea" eggs, and thus can act as biological pest control for soybean crops. The species is nocturnal, as is typical of opilionids.


Question: What equipment or engine is used by this item to provide power?

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Electric motor. An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor's shaft. An electric generator is mechanically identical to an electric motor, but operates with a reversed flow of power, converting mechanical energy into electrical energy.Electric motors can be powered by direct current (DC) sources, such as from batteries, or rectifiers, or by alternating current (AC) sources, such as a power grid, inverters or electrical generators.Electric.

Electric motor. braking with traction motors, electric motors can be used in reverse as generators to recover energy that might otherwise be lost as heat and friction.Electric motors produce linear or rotary force (torque) intended to propel some external mechanism, such as a fan or an elevator. An electric motor is generally designed for continuous rotation, or for linear movement over a significant distance compared to its size. Magnetic solenoids are also transducers that convert electrical power to mechanical motion, but can produce motion over only a limited distance.## History.## Early motors.Before modern electromagnetic motors, experimental motors that worked by electrostatic force.

Electric motor. persistent electric currents. Hans Christian Ørsted discovered in 1820 that an electric current creates a magnetic field, which can exert a force on a magnet. It only took a few weeks for André-Marie Ampère to develop the first formulation of the electromagnetic interaction and present the Ampère's force law, that described the production of mechanical force by the interaction of an electric current and a magnetic field. The first demonstration of the effect with a rotary motion was given by Michael Faraday on 3 September 1821 in the basement of the Royal Institution. A free-hanging wire was dipped into a.

Electric motor. pool of mercury, on which a permanent magnet (PM) was placed. When a current was passed through the wire, the wire rotated around the magnet, showing that the current gave rise to a close circular magnetic field around the wire. Faraday published the results of his discovery in the "Quarterly Journal of Science", and sent copies of his paper along with pocket-sized models of his device to colleagues around the world so they could also witness the phenomenon of electromagnetic rotations. This motor is often demonstrated in physics experiments, substituting brine for (toxic) mercury. Barlow's wheel was an early refinement.

Electric motor. to this Faraday demonstration, although these and similar homopolar motors remained unsuited to practical application until late in the century.In 1827, Hungarian physicist Ányos Jedlik started experimenting with electromagnetic coils. After Jedlik solved the technical problems of continuous rotation with the invention of the commutator, he called his early devices "electromagnetic self-rotors". Although they were used only for teaching, in 1828 Jedlik demonstrated the first device to contain the three main components of practical DC motors: the stator, rotor and commutator. The device employed no permanent magnets, as the magnetic fields of both the stationary and revolving components were produced.

Electric motor. then higher performance.In 1855, Jedlik built a device using similar principles to those used in his electromagnetic self-rotors that was capable of useful work. He built a model electric vehicle that same year.A major turning point came in 1864, when Antonio Pacinotti first described the ring armature (although initially conceived in a DC generator, i.e. a dynamo). This featured symmetrically-grouped coils closed upon themselves and connected to the bars of a commutator, the brushes of which delivered practically non-fluctuating current. The first commercially successful DC motors followed the developments by Zénobe Gramme who, in 1871, reinvented Pacinotti's design and adopted.

Electric motor. from such tasks as handling grain or pumping water. Household uses (like in washing machines, dishwashers, fans, air conditioners and refrigerators (replacing ice boxes)) of electric motors reduced heavy labor in the home and made higher standards of convenience, comfort and safety possible. Today, electric motors consume more than half of the electric energy produced in the US.## AC motors.In 1824, French physicist François Arago formulated the existence of rotating magnetic fields, termed Arago's rotations, which, by manually turning switches on and off, Walter Baily demonstrated in 1879 as in effect the first primitive induction motor. In the 1880s many.

Electric motor. stator, which does not. It also includes two electrical parts, a set of magnets and an armature, one of which is attached to the rotor and the other to the stator, together forming a magnetic circuit: Field magnets - The magnets create a magnetic field that passes through the armature. These can be electromagnets or permanent magnets. The field magnet is usually on the stator and the armature on the rotor, but in some types of motor these are reversed.## Bearings.The rotor is supported by bearings, which allow the rotor to turn on its axis. The bearings are in turn.

Electric motor. supported by the motor housing.## Rotor.The rotor is the moving part that delivers the mechanical power. The rotor typically holds conductors that carry currents, which the magnetic field of the stator exerts force on to turn the shaft. Alternatively, some rotors carry permanent magnets, and the stator holds the conductors. Permanent magnets offer high efficiency over a larger operating speed and power range.An air gap between the stator and rotor allows it to turn. The width of the gap has a significant effect on the motor's electrical characteristics. It is generally made as small as possible, as a large gap.

Electric motor. weakens performance. It is the main source of the low power factor at which motors operate. The magnetizing current increases and the power factor decreases with the air gap, so narrow gaps are better. Conversely, gaps that are too small may pose mechanical problems in addition to noise and losses.The motor shaft extends through the bearings to the outside of the motor, where the load is applied. Because the forces of the load are exerted beyond the outermost bearing, the load is said to be overhung.## Stator.The stator surrounds the rotor, and usually holds field magnets, which are either electromagnets.

Electric motor. consisting of wire windings around a ferromagnetic iron core or permanent magnets. These create a magnetic field that passes through the rotor armature, exerting force on the windings. The stator core is made up of many thin metal sheets that are insulated from each other, called laminations. Laminations are used to reduce energy losses that would result if a solid core were used. Resin-packed motors, used in washing machines and air conditioners, use the damping properties of resin (plastic) to reduce noise and vibration. These motors encapsulate the stator in plastic.## Armature.The armature consists of wire windings on a ferromagnetic.

Electric motor. core. Electric current passing through the wire causes the magnetic field from the field magnet to exert a force (Lorentz force) on it, turning the rotor, which delivers the mechanical output. Windings are wires that are laid in coils, usually wrapped around a laminated, soft, iron, ferromagnetic core so as to form magnetic poles when energized with current.Electric machines come in salient- and nonsalient-pole configurations. In a salient-pole motor the ferromagnetic cores on the rotor and stator have projections called poles facing each other, with a wire winding around each pole below the pole face, which become north or south.

Electric motor. poles of the magnetic field when current flows through the wire. In a nonsalient-pole (or distributed field or round-rotor) motor, the ferromagnetic core is a smooth cylinder, with the windings distributed evenly in slots about the circumference. Supplying alternating current in the windings creates poles in the core that rotate continuously. A shaded-pole motor has a winding around part of the pole that delays the phase of the magnetic field for that pole.## Commutator.A commutator is a rotary electrical switch that supplies current to the rotor. It periodically reverses the flow of current in the rotor windings as the shaft.

Electric motor. each rotor winding would reverse with each half turn, so the rotor would stop. Commutators are inefficient and commutated motors have been mostly replaced by brushless direct current motors, permanent magnet motors, and induction motors.## Motor supply and control.## Motor supply.A DC motor is usually supplied through a split ring commutator as described above. AC motors' commutation can be achieved using either a slip ring commutator or external commutation. It can be fixed-speed or variable-speed control type, and can be synchronous or asynchronous. Universal motors can run on either AC or DC.## Motor control.DC motors can be operated at variable.

Electric motor. speeds by adjusting the voltage applied to the terminals or by using pulse-width modulation (PWM).AC motors operated at a fixed speed are generally powered directly from the grid or through motor soft starters.AC motors operated at variable speeds are powered with various power inverter, variable-frequency drive or electronic commutator technologies.The term electronic commutator is usually associated with self-commutated brushless DC motor and switched reluctance motor applications.## Types.Electric motors operate on one of three physical principles: magnetism, electrostatics and piezoelectricity.In magnetic motors, magnetic fields are formed in both the rotor and the stator. The product between these two fields gives rise.

Electric motor. to a force, and thus a torque on the motor shaft. One, or both, of these fields must change with the rotation of the rotor. This is done by switching the poles on and off at the right time, or varying the strength of the pole.The main types are DC motors and AC motors, with the latter replacing the former. AC electric motors are either asynchronous or synchronous.Once started, a synchronous motor requires synchrony with the moving magnetic field's speed for all normal torque conditions.In synchronous machines, the magnetic field must be provided by means other than induction, such as.

Electric motor. from separately excited windings or permanent magnets.A fractional-horsepower motor either has a rating below about 1 horsepower (0.746 kW), or is manufactured with a standard-frame size smaller than a standard 1 HP motor. Many household and industrial motors are in the fractional-horsepower class.Notes: Rotation is independent of the frequency of the AC voltage. Rotation is equal to synchronous speed (motor-stator-field speed). In SCIM, fixed-speed operation rotation is equal to synchronous speed, less slip speed. In non-slip energy-recovery systems, WRIM is usually used for motor-starting but can be used to vary load speed. Variable-speed operation. Whereas induction- and synchronous-motor drives are.

Electric motor. typically with either six-step or sinusoidal-waveform output, BLDC-motor drives are usually with trapezoidal-current waveform; the behavior of both sinusoidal and trapezoidal PM machines is, however, identical in terms of their fundamental aspects. In variable-speed operation, WRIM is used in slip-energy recovery and double-fed induction-machine applications. A cage winding is a shorted-circuited squirrel-cage rotor, a wound winding is connected externally through slip rings. Mostly single-phase with some three-phase.Abbreviations: BLAC – Brushless AC BLDC – Brushless DC BLDM – Brushless DC motor EC – Electronic commutator PM – Permanent magnet IPMSM – Interior permanent-magnet synchronous motor PMSM – Permanent magnet synchronous motor.

Electric motor. SPMSM – Surface permanent magnet synchronous motor SCIM – Squirrel-cage induction motor SRM – Switched reluctance motor SyRM – Synchronous reluctance motor VFD – Variable-frequency drive WRIM – Wound-rotor induction motor WRSM – Wound-rotor synchronous motor LRA – Locked-rotor amps: The current you can expect under starting conditions when you apply full voltage. It occurs instantly during start-up. RLA – Rated-load amps: The maximum current a motor should draw under any operating conditions. Often mistakenly called running-load amps, which leads people to believe, incorrectly, that the motor should always pull these amps. FLA – Full-load amps: Changed in 1976 to.

Electric motor. "RLA – rated-load amps".## Self-commutated motor.## Brushed DC motor.Most DC motors are small permanent magnet (PM) types. They contain a brushed internal mechanical commutation to reverse motor windings' current in synchronism with rotation.## Electrically excited DC motor.A commutated DC motor has a set of rotating windings wound on an armature mounted on a rotating shaft. The shaft also carries the commutator. Thus, every brushed DC motor has AC flowing through its windings. Current flows through one or more pairs of brushes that touch the commutator; the brushes connect an external source of electric power to the rotating armature.The rotating armature.

Electric motor. consists of one or more wire coils wound around a laminated, magnetically "soft" ferromagnetic core. Current from the brushes flows through the commutator and one winding of the armature, making it a temporary magnet (an electromagnet). The magnetic field produced interacts with a stationary magnetic field produced by either PMs or another winding (a field coil), as part of the motor frame. The force between the two magnetic fields rotates the shaft. The commutator switches power to the coils as the rotor turns, keeping the poles from ever fully aligning with the magnetic poles of the stator field, so that.

Electric motor. – A set of windings that produces a magnetic field. Commutation: A mechanical technique in which rectification can be achieved, or from which DC can be derived.The five types of brushed DC motor are: Shunt-wound Series-wound Compound (two configurations): Cumulative compound Differentially compounded Permanent magnet (not shown) Separately excited (not shown).## Permanent magnet.A permanent magnet (PM) motor does not have a field winding on the stator frame, relying instead on PMs to provide the magnetic field. Compensating windings in series with the armature may be used on large motors to improve commutation under load. This field is fixed and cannot.

Electric motor. be adjusted for speed control. PM fields (stators) are convenient in miniature motors to eliminate the power consumption of the field winding. Most larger DC motors are of the "dynamo" type, which have stator windings. Historically, PMs could not be made to retain high flux if they were disassembled; field windings were more practical to obtain the needed flux. However, large PMs are costly, as well as dangerous and difficult to assemble; this favors wound fields for large machines.To minimize overall weight and size, miniature PM motors may use high energy magnets made with neodymium; most are neodymium-iron-boron alloy. With.

Electric motor. their higher flux density, electric machines with high-energy PMs are at least competitive with all optimally designed singly-fed synchronous and induction electric machines. Miniature motors resemble the structure in the illustration, except that they have at least three rotor poles (to ensure starting, regardless of rotor position) and their outer housing is a steel tube that magnetically links the exteriors of the curved field magnets.## Electronic commutator (EC).## Brushless DC.Some of the problems of the brushed DC motor are eliminated in the BLDC design. In this motor, the mechanical "rotating switch" or commutator is replaced by an external electronic switch.

Electric motor. synchronised to the rotor's position. BLDC motors are typically 85%+ efficient, reaching up to 96.5%, while brushed DC motors are typically 75–80% efficient.The BLDC motor's characteristic trapezoidal counter-electromotive force (CEMF) waveform is derived partly from the stator windings being evenly distributed, and partly from the placement of the rotor's permanent magnets. Also known as electronically commutated DC or inside-out DC motors, the stator windings of trapezoidal BLDC motors can be single-phase, two-phase or three-phase and use Hall effect sensors mounted on their windings for rotor position sensing and low cost closed-loop commutator control.BLDC motors are commonly used where precise speed.

Electric motor. motors are usually used in small equipment such as computers and are generally used in fans to remove heat. They make little noise, which is an advantage in equipment that is affected by vibrations.Modern BLDC motors range in power from a fraction of a watt to many kilowatts. Larger BLDC motors rated up to about 100 kW are used in electric vehicles. They also find use in electric model aircraft.## Switched reluctance motor.The switched reluctance motor (SRM) has no brushes or permanent magnets, and the rotor has no electric currents. Torque comes from a slight misalignment of poles on the.

Electric motor. rotor with poles on the stator. The rotor aligns itself with the magnetic field of the stator, while the stator field windings are sequentially energized to rotate the stator field.The magnetic flux created by the field windings follows the path of least magnetic sending the flux through rotor poles that are closest to the energized poles of the stator, thereby magnetizing those poles of the rotor and creating torque. As the rotor turns, different windings are energized, keeping the rotor turning.SRMs are used in some appliances and vehicles.## Universal AC/DC motor.A commutated, electrically excited, series or parallel wound motor is.

Electric motor. referred to as a universal motor because it can be designed to operate on either AC or DC power. A universal motor can operate well on AC because the current in both the field and the armature coils (and hence the resultant magnetic fields) synchronously reverse polarity, and hence the resulting mechanical force occurs in a constant direction of rotation.Operating at normal power line frequencies, universal motors are often used in sub-kilowatt applications. Universal motors formed the basis of the traditional railway traction motor in electric railways. In this application, using AC power on a motor designed to run on.

Electric motor. DC would experience efficiency losses due to eddy current heating of their magnetic components, particularly the motor field pole-pieces that, for DC, would have used solid (un-laminated) iron. They are now rarely used.An advantage is that AC power may be used on motors that specifically have high starting torque and compact design if high running speeds are used. By contrast, maintenance is higher and lifetimes are shortened. Such motors are used in devices that are not heavily used, and have high starting-torque demands. Multiple taps on the field coil provide (imprecise) stepped speed control. Household blenders that advertise many speeds.

Electric motor. an asynchronous AC motor where power is transferred to the rotor by electromagnetic induction, much like transformer action. An induction motor resembles a rotating transformer, because the stator (stationary part) is essentially the primary side of the transformer and the rotor (rotating part) is the secondary side. Polyphase induction motors are widely used in industry.## Cage and wound rotor.Induction motors may be divided into Squirrel Cage Induction Motors (SCIM) and Wound Rotor Induction Motors (WRIM). SCIMs have a heavy winding made up of solid bars, usually aluminum or copper, electrically connected by rings at the ends of the rotor. The.

Electric motor. bars and rings as a whole are much like an animal's rotating exercise cage.Currents induced into this winding provide the rotor magnetic field. The shape of the rotor bars determines the speed-torque characteristics. At low speeds, the current induced in the squirrel cage is nearly at line frequency and tends to stay in the outer parts of the cage. As the motor accelerates, the slip frequency becomes lower, and more current reaches the interior. By shaping the bars to change the resistance of the winding portions in the interior and outer parts of the cage, a variable resistance is effectively.

Electric motor. steering wheels.Another common application is to control the throttle of an internal combustion engine with an electronic governor. The motor works against a return spring to move the throttle in accord with the governor output. The latter monitors engine speed by counting electrical pulses from the ignition system or from a magnetic pickup and depending on the speed, makes small adjustments to the amount of current. If the engine slows down relative to the desired speed, the current increases, producing more torque, pulling against the return spring and opening the throttle. Should the engine run too fast, the governor reduces.

Electric motor. the current, allowing the return spring to pull back and reduce the throttle.## Synchronous motor.A synchronous electric motor is an AC motor. It includes a rotor spinning with coils passing magnets at the same frequency as the AC and produces a magnetic field to drive it. It has zero slip under typical operating conditions. By contrast induction motors must slip to produce torque. One type of synchronous motor is like an induction motor except that the rotor is excited by a DC field. Slip rings and brushes conduct current to the rotor. The rotor poles connect to each other and.

Electric motor. when slip rate decreases sufficiently, the rotor (a smooth cylinder) becomes temporarily magnetized. Its distributed poles make it act like a permanent magnet synchronous motor. The rotor material, like that of a common nail, stays magnetized, but can be demagnetized with little difficulty. Once running, the rotor poles stay in place; they do not drift.Low-power synchronous timing motors (such as those for traditional electric clocks) may have multi-pole permanent magnet external cup rotors, and use shading coils to provide starting torque. "Telechron" clock motors have shaded poles for starting torque, and a two-spoke ring rotor that performs like a discrete.

Electric motor. allows for a smaller electronic converter but the cost of the rotor winding and slip rings may offset the saving in the power electronics components. Difficulties affect controlling speed near synchronous speed limit applications.## Special magnetic motors.## Rotary.## Ironless or coreless rotor motor.The coreless or ironless DC motor is a specialized permanent magnet DC motor. Optimized for rapid acceleration, the rotor is constructed without an iron core. The rotor can take the form of a winding-filled cylinder, or a self-supporting structure comprising only wire and bonding material. The rotor can fit inside the stator magnets; a magnetically soft stationary cylinder.

Electric motor. inside the rotor provides a return path for the stator magnetic flux. A second arrangement has the rotor winding basket surrounding the stator magnets. In that design, the rotor fits inside a magnetically soft cylinder that can serve as the motor housing, and provides a return path for the flux.Because the rotor is much lower mass than a conventional rotor, it can accelerate much more rapidly, often achieving a mechanical time constant under one millisecond. This is especially true if the windings use aluminum rather than (heavier) copper. The rotor has no metal mass to act as a heat sink;.

Electric motor. even small motors must be cooled. Overheating can be an issue for these designs.The vibrating alert of cellular phones can be generated by cylindrical permanent-magnet motors, or disc-shaped types that have a thin multipolar disc field magnet, and an intentionally unbalanced molded-plastic rotor structure with two bonded coreless coils. Metal brushes and a flat commutator switch power to the rotor coils.Related limited-travel actuators have no core and a bonded coil placed between the poles of high-flux thin permanent magnets. These are the fast head positioners for rigid-disk ("hard disk") drives. Although the contemporary design differs considerably from that of loudspeakers,.

Electric motor. it is still loosely (and incorrectly) referred to as a "voice coil" structure, because some earlier rigid-disk-drive heads moved in straight lines, and had a drive structure much like that of a loudspeaker.## Pancake or axial rotor motor.The printed armature or pancake motor has windings shaped as a disc running between arrays of high-flux magnets. The magnets are arranged in a circle facing the rotor spaced to form an axial air gap. This design is commonly known as the pancake motor because of its flat profile.The armature (originally formed on a printed circuit board) is made from punched copper sheets.

Electric motor. with 180 (C), Class H rating.The unique advantage of ironless DC motors is the absence of cogging (torque variations caused by changing attraction between the iron and the magnets). Parasitic eddy currents cannot form in the rotor as it is totally ironless, although iron rotors are laminated. This can greatly improve efficiency, but variable-speed controllers must use a higher switching rate (>40 kHz) or DC because of decreased electromagnetic induction.These motors were invented to drive the capstan(s) of magnetic tape drives, where minimal time to reach operating speed and minimal stopping distance were critical. Pancake motors are widely used in.

Electric motor. high-performance servo-controlled systems, robotic systems, industrial automation and medical devices. Due to the variety of constructions now available, the technology is used in applications from high temperature military to low cost pump and basic servos.Another approach (Magnax) is to use a single stator sandwiched between two rotors. One such design has produced peak power of 15 kW/kg, sustained power around 7.5 kW/kg. This yokeless axial flux motor offers a shorter flux path, keeping the magnets further from the axis. The design allows zero winding overhang; 100 percent of the windings are active. This is enhanced with the use of rectangular-crosssection.

Electric motor. copper wire. The motors can be stacked to work in parallel. Instabilities are minimized by ensuring that the two rotor discs put equal and opposing forces onto the stator disc. The rotors are connected directly to one another via a shaft ring, cancelling out the magnetic forces.Magnax motors range in size from 0.15-5.4 (m) in diameter.## Servo motor.A servo motor is a motor that is used within a position-control or speed-control feedback system. Servomotors are used in applications such as machine tools, pen plotters, and other process systems. Motors intended for use in a servomechanism must have predictable characteristics for.

Electric motor. speed, torque, and power. The speed/torque curve is important and is high ratio for a servo motor. Dynamic response characteristics such as winding inductance and rotor inertia are important; these factors limit performance. Large, powerful, but slow-responding servo loops may use conventional AC or DC motors and drive systems with position or speed feedback. As dynamic response requirements increase, more specialized motor designs such as coreless motors are used. AC motors' superior power density and acceleration characteristics tends to favor permanent magnet synchronous, BLDC, induction, and SRM drive approaches.A servo system differs from some stepper motor applications in that position.

Electric motor. feedback is continuous while the motor is running. A stepper system inherently operates open-loop—relying on the motor not to "miss steps" for short term accuracy—with any feedback such as a "home" switch or position encoder external to the motor system.## Stepper motor.Stepper motors are typically used to provide precise rotations. An internal rotor containing permanent magnets or a magnetically soft rotor with salient poles is controlled by a set of electronically switched external magnets. A stepper motor may also be thought of as a cross between a DC electric motor and a rotary solenoid. As each coil is energized in.

Electric motor. turn, the rotor aligns itself with the magnetic field produced by the energized field winding. Unlike a synchronous motor, the stepper motor may not rotate continuously; instead, it moves in steps—starting and then stopping—advancing from one position to the next as field windings are energized and de-energized in sequence. Depending on the sequence, the rotor may turn forwards or backwards, and it may change direction, stop, speed up or slow down at any time.Simple stepper motor drivers entirely energize or entirely de-energize the field windings, leading the rotor to "cog" to a limited number of positions. Microstepping drivers can proportionally.

Electric motor. made them uncompetitive—thus newer hard disk drives use voice coil-based head actuator systems. (The term "voice coil" in this connection is historic; it refers to the structure in a cone-type loudspeaker.)Stepper motors are often used in computer printers, optical scanners, and digital photocopiers to move the active element, the print head carriage (inkjet printers), and the platen or feed rollers.So-called quartz analog wristwatches contain the smallest commonplace stepping motors; they have one coil, draw little power, and have a permanent magnet rotor. The same kind of motor drives battery-powered quartz clocks. Some of these watches, such as chronographs, contain more.

Electric motor. 1978 era HP 7225A pen plotter used two linear stepper motors to move the pen along the X and Y axes.## Electromagnetism.## Force and torque.An electric motor converts electrical energy to mechanical energy through the force between two opposed magnetic fields. At least one of the two magnetic fields must be created by an electromagnet through the magnetic field caused by an electrical current.The force between a current formula_1 in a conductor of length formula_2 perpendicular to a magnetic field formula_3 may be calculated using the Lorentz force law: formula_4Note: X denotes vector cross product. The most general approaches to.

Electric motor. resistance Ir2 – square of current induced in the rotor s – motor slip; i.e., difference between synchronous speed and slip speed, which provides the relative movement needed for current induction in the rotor.## Back EMF.The movement of armature windings of a direct-current or universal motor through a magnetic field, induce a voltage in them. This voltage tends to oppose the motor supply voltage and so is called "back electromotive force (EMF)". The voltage is proportional to the running speed of the motor. The back EMF of the motor, plus the voltage drop across the winding internal resistance and brushes,.

Electric motor. enacted legislation to encourage the manufacture and use of higher-efficiency motors. Electric motors have efficiencies ranging from at least 15% for shaded pole motors, up to 98% for permanent magnet motors, with efficiency also dependent on load. Peak efficiency is usually at 75% of the rated load. So (as an example) a 10 HP motor is most efficient when driving a load that requires 7.5 HP. Efficiency also depends on motor size; larger motors tend to be more efficient. Some motors can not operate continually for more than a specified period of time (e.g. for more than an hour per.

Electric motor. run)## Goodness factor.Eric Laithwaite proposed a metric to determine the 'goodness' of an electric motor: formula_21Where: formula_22 is the goodness factor (factors above 1 are likely to be efficient) formula_23 are the cross sectional areas of the magnetic and electric circuit formula_24 are the lengths of the magnetic and electric circuits formula_25 is the permeability of the core formula_20 is the angular frequency the motor is driven atFrom this, he showed that the most efficient motors are likely to have relatively large magnetic poles. However, the equation only directly relates to non PM motors.## Performance parameters.## Torque.Electromagnetic motors derive torque.

Electric motor. from the vector product of the interacting fields. Calculating torque requires knowledge of the fields in the air gap. Once these have been established, the torque is the integral of all the force vectors multiplied by the vector's radius. The current flowing in the winding produces the fields. For a motor using a magnetic material the field is not proportional to the current.A figure relating the current to the torque can inform motor selection. The maximum torque for a motor depends on the maximum current, absent thermal considerations.When optimally designed within a given core saturation constraint and for a given.

Electric motor. active current (i.e., torque current), voltage, pole-pair number, excitation frequency (i.e., synchronous speed), and air-gap flux density, all categories of electric motors/generators exhibit virtually the same maximum continuous shaft torque (i.e., operating torque) within a given air-gap area with winding slots and back-iron depth, which determines the physical size of electromagnetic core. Some applications require bursts of torque beyond the maximum, such as bursts to accelerate an electric vehicle from standstill. Always limited by magnetic core saturation or safe operating temperature rise and voltage, the capacity for torque bursts beyond the maximum differs significantly across motor/generator types.Electric machines without a.

Electric motor. transformer circuit topology, such as that of WRSMs or PMSMs, cannot provide torque bursts without saturating the magnetic core. At that point, additional current cannot increase torque. Furthermore, the permanent magnet assembly of PMSMs can be irreparably damaged.Electric machines with a transformer circuit topology, such as induction machines, induction doubly-fed electric machines, and induction or synchronous wound-rotor doubly-fed (WRDF) machines, permit torque bursts because the EMF-induced active current on either side of the transformer oppose each other and thus contribute nothing to the transformer coupled magnetic core flux density, avoiding core saturation.Electric machines that rely on induction or asynchronous principles.

Electric motor. the air-gap area and the back-iron depth, which are determined by the power rating of the armature winding set, the speed of the machine, and the achievable air-gap flux density before core saturation. Despite the high coercivity of neodymium or samarium-cobalt permanent magnets, continuous torque density is virtually the same amongst electric machines with optimally designed armature winding sets. Continuous torque density relates to method of cooling and permissible operation period before destruction by overheating of windings or permanent magnet damage.Other sources state that various e-machine topologies have differing torque density. One source shows the following:where—specific torque density is normalized.

Electric motor. to 1.0 for the surface permanent magnet (SPM)—brushless ac, 180° current conduction.Torque density is approximately four times greater for liquid cooled motors, compared to those which are air cooled.A source comparing direct current, induction motors (IM), PMSM and SRM showed:Another source notes that PMSM up to 1 MW have considerably higher torque density than induction machines.## Continuous power density.The continuous power density is determined by the product of the continuous torque density and the constant torque speed range. Electric motors can achieve densities of up to 20KW/KG, meaning 20 Kilowatts of output power per kilogram.## Acoustic noise and vibrations.Acoustic noise.

Electric motor. and vibrations are usually classified in three sources: mechanical sources (e.g. due to bearings) aerodynamic sources (e.g. due to shaft-mounted fans) magnetic sources (e.g. due to magnetic forces such as Maxwell and magnetostriction forces acting on stator and rotor structures)The latter source, which can be responsible for the "whining noise" of electric motors, is called electromagnetically induced acoustic noise.## Standards.The following are major design, manufacturing, and testing standards covering electric motors: American Petroleum Institute: API 541 Form-Wound Squirrel Cage Induction Motors – 375 kW (500 Horsepower) and Larger American Petroleum Institute: API 546 Brushless Synchronous Machines – 500 kVA and.

Electric motor. 60072 Dimensions and output series for rotating electrical machines National Electrical Manufacturers Association: MG-1 Motors and Generators Underwriters Laboratories: UL 1004 – Standard for Electric Motors Indian Standard: IS:12615-2018 – Line Operated Three Phase a.c. Motors (IE CODE) “Efficiency Classes and Performance Specification” (Third Revision)## Non-magnetic motors.An electrostatic motor is based on the attraction and repulsion of electric charge. Usually, electrostatic motors are the dual of conventional coil-based motors. They typically require a high-voltage power supply, although small motors employ lower voltages. Conventional electric motors instead employ magnetic attraction and repulsion, and require high current at low voltages. In the.

Electric motor. produces acoustic or ultrasonic vibrations to produce linear or rotary motion. In one mechanism, the elongation in a single plane is used to make a series of stretches and position holds, similar to the way a caterpillar moves.An electrically powered spacecraft propulsion system uses electric motor technology to propel spacecraft in outer space. Most systems are based on electrically accelerating propellant to high speed, while some systems are based on electrodynamic tethers principles of propulsion to the magnetosphere. Electric generator Regenerative brake Goodness factor Motor capacitor Traction motor Motor controller Houston, Edwin J.; Kennelly, Arthur, "Recent Types of Dynamo-Electric Machinery",.


Question: How many levels does this building have?

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

30 St Mary Axe. 30 St Mary Axe (previously known as the Swiss Re Building and informally known as the Gherkin) is a commercial skyscraper in London's primary financial district, the City of London. It was completed in December 2003 and opened in April 2004. With 41 floors, it is 180 (m) tall and stands on the sites of the former Baltic Exchange and Chamber of Shipping, which were extensively damaged in 1992 in the Baltic Exchange bombing by a device placed by the Provisional IRA in St Mary Axe, a narrow street leading north from Leadenhall Street.After plans to build the 92-storey Millennium.


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

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

Muscovy duck. The Muscovy duck (Cairina moschata) is a large duck native to the Americas, from the Rio Grande Valley of Texas and Mexico south to Argentina and Uruguay. Small wild and feral breeding populations have established themselves in the United States, particularly in Florida, Louisiana, Massachusetts, the Big Island of Hawaii, as well as in many other parts of North America, including southern Canada. Feral Muscovy ducks are found in New Zealand, Australia, and in parts of Europe.It is a large duck, with the males about 76 (cm) long, and weighing up to 7 (kg). Females are noticeably smaller, and only.

Muscovy duck. a tropical bird, it adapts well to cooler climates, thriving in weather as cold as −12 (C) and able to survive even colder conditions. In general, Barbary duck is the term used for "C. moschata" in a culinary context.The domestic subspecies, "Cairina moschata domestica", is commonly known in Spanish as the "pato criollo". They have been bred since pre-Columbian times by Native Americans and are heavier and less able to fly long distances than the wild subspecies. Their plumage color is also more variable. Other names for the domestic breed in Spanish are "pato casero" ("backyard duck") and "pato mudo.

Muscovy duck. muschiata", Spanish "pato almizclado" and Swedish "myskand". In English, however, musk duck refers to the Australian species "Biziura lobata".## Genus name "Cairina".The currently assigned genus name Cairina, meanwhile, traces its origin to Aldrovandi and the mistaken belief that the birds came from Egypt: translated, the current scientific name of the Muscovy duck means "the musky one from Cairo".## Other names.In some regions the name "Barbary duck" is used for domestic and "Muscovy duck" for wild birds; in other places, "Barbary duck" refers specifically to the dressed carcass, while "Muscovy duck" applies to living "C. moschata", regardless of whether they are.

Muscovy duck. wild or domestic. In general, "Barbary duck" is the usual term for "C. moschata" in a culinary context.## Taxonomy and systematics.The species was first scientifically described by Carl Linnaeus in his 1758 edition of "Systema Naturae" as "Anas moschata", literally meaning "musk duck". It was later transferred to the genus "Cairina", making its current binomial name "Cairina moschata".The Muscovy duck was formerly placed into the paraphyletic "perching duck" assemblage, but subsequently moved to the dabbling duck subfamily (Anatinae). Analysis of the mtDNA sequences of the cytochrome "b" and NADH dehydrogenase subunit 2 genes, however, indicates that it might be closer.

Muscovy duck. to the genus "Aix" and better placed in the shelduck subfamily Tadorninae. In addition, the other species of "Cairina", the rare white-winged duck ("C. scutulata"), seems to belong to a distinct genus ("Asarcornis").## Ecology.This non-migratory species normally inhabits forested swamps, lakes, streams and nearby grassland and farm crops, and often roosts in trees at night. The Muscovy duck's diet consists of plant material (such as the roots, stems, leaves, and seeds of aquatic plants and grasses, as well as terrestrial plants, including agricultural crops) obtained by grazing or dabbling in shallow water, and small fish, amphibians, reptiles, crustaceans, insects, millipedes,.


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

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

Tussilago. Tussilago farfara, commonly known as coltsfoot, is a plant in the tribe Senecioneae in the family Asteraceae, native to Europe and parts of western and central Asia. The name "tussilago" is derived from the Latin "tussis", meaning cough, and "ago", meaning to cast or to act on. It has had uses in traditional medicine, but the discovery of toxic pyrrolizidine alkaloids in the plant has resulted in liver health concerns."Tussilago farfara" is the only accepted species in the genus Tussilago, although more than two dozen other species have at one time or another been considered part of this group. Most.

Tussilago. of them are now regarded as members of other genera "(Chaptalia, Chevreulia, Farfugium, Homogyne, Leibnitzia, Petasites, Senecio)."## Description.Coltsfoot is a perennial herbaceous plant that spreads by seeds and rhizomes. "Tussilago" is often found in colonies of dozens of plants. The flowers, which superficially resemble dandelions, bear scale-leaves on the long stems in early spring. The leaves of coltsfoot, which appear after the flowers have set seed, wither and die in the early summer. The flower heads are of yellow florets with an outer row of bracts. The plant is typically 10–30 (cm) in height. The leaves have angular teeth on.

Tussilago. their margins.## Distribution.Coltsfoot is widespread across Europe, Asia, and North Africa, from Svalbard to Morocco to China and the Russian Far East. It is also a common plant in North and South America where it has been introduced, most likely by settlers as a medicinal item. The plant is often found in waste and disturbed places and along roadsides and paths. In some areas it is considered an invasive species.## Name.The common name comes from the leaf's supposed resemblance in shape to a colt's foot. It is a 16th century translation of the medieval Latin name "pes pulli", meaning "foal's.

Tussilago. foot". Other common names include tash plant, ass's foot, bull's foot, coughwort (Old English), farfara, foal's foot, foalswort, and horse foot. Sometimes it is confused with "Petasites frigidus", or western coltsfoot.It has been called "bechion", "bechichie", or "bechie", from the Ancient Greek word for "cough". Also "ungula caballina" ("horse hoof"), and "chamæleuce".## Uses.Coltsfoot has been used in herbal medicine and has been consumed as a food product with some confectionery products, such as Coltsfoot Rock. "Tussilago farfara" leaves have been used in traditional Austrian medicine internally (as tea or syrup) or externally (directly applied) for treatment of disorders of the.

Tussilago. respiratory tract, skin, locomotor system, viral infections, flu, colds, fever, rheumatism and gout. An extract of the fresh leaves has also been used to make cough drops and hard candy.Coltsfoot is used as a food plant by the larvae of some Lepidoptera species including the Gothic and small angle shades. It is also visited by honeybees, providing pollen and nectar.## Toxicity."Tussilago farfara" contains tumorigenic pyrrolizidine alkaloids. Senecionine and senkirkine, present in coltsfoot, have the highest mutagenetic activity of any pyrrolozidine alkaloid, tested using "Drosophila melanogaster" to produce a comparative genotoxicity test.Two cases of supposed liver damage (and death) due to.

Tussilago. coltsfoot tea have been shown to actually be the result of mistaken identity. In one, coltsfoot tea causing severe liver problems in an infant was actually the result of "Adenostyles alliariae" (alpendost). In another case, an infant developed liver disease and died because the mother drank tea originally believed to contain coltsfoot during her pregnancy, but which was later shown to be "Petasites hybridus" (butterbur) or a similar species. In one 27-year-old male, ingesting a multicomponent herbal supplement that included coltsfoot may have caused him to develop non-lethal deep vein thrombosis and pulmonary embolism.In response, the German government banned the.

Tussilago. sale of coltsfoot. Clonal plants of coltsfoot free of pyrrolizidine alkaloids were then developed in Austria and Germany. This has resulted in the development of the registered variety "Tussilago farfara" 'Wien', which has no detectable levels of these alkaloids. List of herbs with known adverse effects R. Schubert & G. Wagner: "Botanisches Wörterbuch" Ulmer, Stuttgart 1993, H. Haeupler & Th. Muer: "Bildatlas der Farn- und Blütenpflanzen Deutschlands" Ulmer Verlag, Stuttgart, 2000. . Gerhard Madaus: "Lehrbuch der biologischen Heilmittel" Bd 1. Heilpflanzen. G. Thieme, Leipzig 1938, Olms, Hildesheim 1979. Guide des plantes sauvages comestibles et toxiques, les guides du naturaliste, François.

Tussilago. Couplan et Eva Stinner Кирпичников М. Э. Семейство сложноцветные, или астровые (Asteraceae, или Compositae) // Жизнь растений. В 6-ти т. / Под ред. А. Л. Тахтаджяна. — М.: Просвещение, 1981. — Т. 5. Ч. 2. Цветковые растения. — С. 462–476. — 300000 экз. Coltsfoot information.


Question: What is the typical diameter (in 1) of this object?

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

Tetrahedron. regular tetrahedron.The following Cartesian coordinates define the four vertices of a tetrahedron with edge length 2, centered at the origin, and two level edges:formula_1Expressed symmetrically as 4 points on the unit sphere, centroid at the origin, with lower face level, the vertices are:formula_2formula_3formula_4formula_5with the edge length of formula_6.Still another set of coordinates are based on an alternated cube or demicube with edge length 2. This form has Coxeter diagram and Schläfli symbol h{4,3}. The tetrahedron in this case has edge length 2. Inverting these coordinates generates the dual tetrahedron, and the pair together form the stellated octahedron, whose vertices are.

Tetrahedron. those of the original cube.Tetrahedron: (1,1,1), (1,−1,−1), (−1,1,−1), (−1,−1,1)Dual tetrahedron: (−1,−1,−1), (−1,1,1), (1,−1,1), (1,1,−1)## Angles and distances.For a regular tetrahedron of edge length "a":With respect to the base plane the slope of a face (2) is twice that of an edge (), corresponding to the fact that the "horizontal" distance covered from the base to the apex along an edge is twice that along the median of a face. In other words, if "C" is the centroid of the base, the distance from "C" to a vertex of the base is twice that from "C" to the midpoint of an.

Tetrahedron. two tetrahedra in the cube). The symmetries of a regular tetrahedron correspond to half of those of a cube: those that map the tetrahedra to themselves, and not to each other.The tetrahedron is the only Platonic solid that is not mapped to itself by point inversion.The regular tetrahedron has 24 isometries, forming the symmetry group Td, [3,3], (*332), isomorphic to the symmetric group, "S"4. They can be categorized as follows: T, [3,3]+, (332) is isomorphic to alternating group, "A"4 (the identity and 11 proper rotations) with the following conjugacy classes (in parentheses are given the permutations of the vertices, or.

Tetrahedron. correspondingly, the faces, and the unit quaternion representation): identity (identity; 1) rotation about an axis through a vertex, perpendicular to the opposite plane, by an angle of ±120°: 4 axes, 2 per axis, together , etc.; ) rotation by an angle of 180° such that an edge maps to the opposite edge: , etc.; ) reflections in a plane perpendicular to an edge: 6 reflections in a plane combined with 90° rotation about an axis perpendicular to the plane: 3 axes, 2 per axis, together 6; equivalently, they are 90° rotations combined with inversion (x is mapped to −x): the.

Tetrahedron. are projected as circular arcs on the plane.## Helical stacking.Regular tetrahedra can be stacked face-to-face in a chiral aperiodic chain called the Boerdijk–Coxeter helix. In four dimensions, all the convex regular 4-polytopes with tetrahedral cells (the 5-cell, 16-cell and 600-cell) can be constructed as tilings of the 3-sphere by these chains, which become periodic in the three-dimensional space of the 4-polytope's boundary surface.## Irregular tetrahedra.Tetrahedra which do not have four equilateral faces are categorized and named by the symmetries they do possess.If all three pairs of opposite edges of a tetrahedron are perpendicular, then it is called an orthocentric tetrahedron.

Tetrahedron. to the opposite faces are inversely proportional to the areas of these faces.For a tetrahedron with vertices,, and, the volume is , or any other combination of pairs of vertices that form a simply connected graph. This can be rewritten using a dot product and a cross product, yieldingformula_9If the origin of the coordinate system is chosen to coincide with vertex d, then d = 0, soformula_10where a, b, and c represent three edges that meet at one vertex, and is a scalar triple product. Comparing this formula with that used to compute the volume of a parallelepiped, we conclude.

Tetrahedron. that the volume of a tetrahedron is equal to of the volume of any parallelepiped that shares three converging edges with it.The absolute value of the scalar triple product can be represented as the following absolute values of determinants:formula_11orformula_12whereformula_13are expressed as row or column vectors.Henceformula_14whereformula_15which givesformula_16where "α", "β", "γ" are the plane angles occurring in vertex d. The angle "α", is the angle between the two edges connecting the vertex d to the vertices b and c. The angle "β", does so for the vertices a and c, while "γ", is defined by the position of the vertices a and.

Tetrahedron. b.If we do not require that d = 0 thenformula_17Given the distances between the vertices of a tetrahedron the volume can be computed using the Cayley–Menger determinant:formula_18where the subscripts represent the vertices and "d" is the pairwise distance between them – i.e., the length of the edge connecting the two vertices. A negative value of the determinant means that a tetrahedron cannot be constructed with the given distances. This formula, sometimes called Tartaglia's formula, is essentially due to the painter Piero della Francesca in the 15th century, as a three dimensional analogue of the 1st century Heron's formula for the.

Tetrahedron. area of a triangle.Let be three edges that meet at a point, and the opposite edges. Let be the volume of the tetrahedron; thenformula_19whereformula_20The above formula uses six lengths of edges, and the following formula uses three lengths of edges and three angles.formula_21## Heron-type formula for the volume of a tetrahedron.If , , , , , are lengths of edges of the tetrahedron (first three form a triangle; with opposite , opposite , opposite ), thenformula_22where formula_23 formula_24## Volume divider.Any plane containing a bimedian (connector of opposite edges' midpoints) of a tetrahedron bisects the volume of the tetrahedron.## Non-Euclidean volume.For.

Tetrahedron. segment joining the midpoints of two opposite edges is called a "bimedian" of the tetrahedron. Hence there are four medians and three bimedians in a tetrahedron. These seven line segments are all concurrent at a point called the "centroid" of the tetrahedron. In addition the four medians are divided in a 3:1 ratio by the centroid (see Commandino's theorem). The centroid of a tetrahedron is the midpoint between its Monge point and circumcenter. These points define the "Euler line" of the tetrahedron that is analogous to the Euler line of a triangle.The nine-point circle of the general triangle has an.

Tetrahedron. is a diagonal of one of the cube's faces. For one such embedding, the Cartesian coordinates of the vertices are(+1, +1, +1);(−1, −1, +1);(−1, +1, −1);(+1, −1, −1).This yields a tetrahedron with edge-length 2, centered at the origin. For the other tetrahedron (which is dual to the first), reverse all the signs. These two tetrahedra's vertices combined are the vertices of a cube, demonstrating that the regular tetrahedron is the 3-demicube.The volume of this tetrahedron is one-third the volume of the cube. Combining both tetrahedra gives a regular polyhedral compound called the compound of two tetrahedra or stella octangula.The interior.

Tetrahedron. of the stella octangula is an octahedron, and correspondingly, a regular octahedron is the result of cutting off, from a regular tetrahedron, four regular tetrahedra of half the linear size (i.e., rectifying the tetrahedron).The above embedding divides the cube into five tetrahedra, one of which is regular. In fact, five is the minimum number of tetrahedra required to compose a cube. To see this, starting from a base tetrahedron with 4 vertices, each added tetrahedra adds at most 1 new vertex, so at least 4 more must be added to make a cube, which has 8 vertices.Inscribing tetrahedra inside the.

Tetrahedron. and counterclockwise orientations of the surface.Putting any of the four vertices in the role of "O" yields four such identities, but at most three of them are independent: If the "clockwise" sides of three of them are multiplied and the product is inferred to be equal to the product of the "counterclockwise" sides of the same three identities, and then common factors are cancelled from both sides, the result is the fourth identity.Three angles are the angles of some triangle if and only if their sum is 180° (π radians). What condition on 12 angles is necessary and sufficient for.

Tetrahedron. them to be the 12 angles of some tetrahedron? Clearly the sum of the angles of any side of the tetrahedron must be 180°. Since there are four such triangles, there are four such constraints on sums of angles, and the number of degrees of freedom is thereby reduced from 12 to 8. The four relations given by this sine law further reduce the number of degrees of freedom, from 8 down to not 4 but 5, since the fourth constraint is not independent of the first three. Thus the space of all shapes of tetrahedra is 5-dimensional.## Law of.

Tetrahedron. faces are "F"a, "F"b, "F"c, and "F"d. Thenformula_29For vertices "A", "B", "C", and "D", interior point "P", and feet "J", "K", "L", and "M" of the perpendiculars from "P" to the faces, and suppose the faces have equal areas, thenformula_30## Inradius.Denoting the inradius of a tetrahedron as "r" and the inradii of its triangular faces as "r""i" for "i" = 1, 2, 3, 4, we haveformula_31with equality if and only if the tetrahedron is regular.If "A""1", "A""2", "A""3" and "A""4" denote the area of each faces, the value of "r" is given byformula_32.This formula is obtained from dividing the tetrahedron.

Tetrahedron. tetrahedra. One example has one edge of 896, the opposite edge of 990 and the other four edges of 1073; two faces are isosceles triangles with areas of and the other two are isosceles with areas of , while the volume is .A tetrahedron can have integer volume and consecutive integers as edges, an example being the one with edges 6, 7, 8, 9, 10, and 11 and volume 48.## Related polyhedra and compounds.A regular tetrahedron can be seen as a triangular pyramid.A regular tetrahedron can be seen as a degenerate polyhedron, a uniform "digonal antiprism", where base polygons are.

Tetrahedron. is arccos(−), or approximately 109.47°.Water, , also has a tetrahedral structure, with two hydrogen atoms and two lone pairs of electrons around the central oxygen atoms. Its tetrahedral symmetry is not perfect, however, because the lone pairs repel more than the single O–H bonds.Quaternary phase diagrams of mixtures of chemical substances are represented graphically as tetrahedra.However, quaternary phase diagrams in communication engineering are represented graphically on a two-dimensional plane.## Electricity and electronics.If six equal resistors are soldered together to form a tetrahedron, then the resistance measured between any two vertices is half that of one resistor.Since silicon is the most.

Tetrahedron. rolled appearing around the bottom or on the top vertex. Some Rubik's Cube-like puzzles are tetrahedral, such as the Pyraminx and Pyramorphix.## Geology.The tetrahedral hypothesis, originally published by William Lowthian Green to explain the formation of the Earth, was popular through the early 20th century.## Weaponry.Some caltrops are based on tetrahedra as one spike points upwards regardless of how they land and can be easily made by welding two bent nails together.## Contemporary art.The Austrian artist Martina Schettina created a tetrahedron using fluorescent lamps. It was shown at the light art biennale Austria 2010.It is used as album artwork, surrounded.


Question: Which significant event was held in this building?

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

Venetian Towers. Venice.They were originally envisaged in Léon Jaussely's city expansion plan of 1907, and designed by architect and built in the period 1927 to 1929, as part of the redevelopment of the area for the 1929 Barcelona International Exposition. Reventós was also involved in a number of other projects featured in the exhibition, such as the Greek Theatre (Teatre Grec), the Spanish Village (Poble Espanyol), and the buildings of the Montjuïc Funicular on the nearby hill of Montjuïc.They serve an ornamental function, to mark the entrance to the exhibition district, now known as Fira de Barcelona, and the start of the.

Venetian Towers. which included replacing the roofs which were originally of slate.In 2009, a survey detected defects in the stonework in both towers, and resulted in netting being wrapped around the viewing galleries to catch any falling debris.During September 2013, the towers started undergoing extensive restoration work costing €472,000. The work was expected to be completed in January 2014, and it enabled the removal of the netting which had previously been put in place.


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

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

Liquidambar styraciflua. American sweetgum (Liquidambar styraciflua), also known as American storax, hazel pine, bilsted, redgum, satin-walnut, star-leaved gum, alligatorwood, or simply sweetgum, is a deciduous tree in the genus "Liquidambar" native to warm temperate areas of eastern North America and tropical montane regions of Mexico and Central America. Sweetgum is one of the main valuable forest trees in the southeastern United States, and is a popular ornamental tree in temperate climates. It is recognizable by the combination of its five-pointed star-shaped leaves (similar to maple leaves) and its hard, spiked fruits. It is currently classified in the plant family Altingiaceae, but was.

Liquidambar styraciflua. formerly considered a member of the Hamamelidaceae.## Names.This plant's genus name "Liquidambar" was first given by Linnaeus in 1753 from the Latin ('fluid') and the Arabic ('amber'), in allusion to the fragrant terebinthine juice or gum which exudes from the tree. Its specific epithet "styraciflua" is an old generic name meaning 'flowing with storax' (a plant resin). The name "storax" has long been confusingly applied to the aromatic gum or resin of this species, that of "L. orientalis" of Turkey, and to the resin better known as benzoin from various tropical trees in the genus "Styrax".The sweetgum has a Nahuatl.

Liquidambar styraciflua. name, "Ocotzocuahuitl", which translates to 'tree that gives pine resin' from "ocotl" ('pine'), "tzotl" ('resin'), "cuahuitl" ('tree'), which refers to the use of the tree's resin.The common name "sweetgum" refers to the species' "sweetish gum", contrasting with the blackgum ("Nyssa sylvatica"), only distantly related, with which the sweetgum overlaps broadly in range. The species is also known as the "redgum", for its reddish bark.## History.The earliest known published record of "Liquidambar styraciflua" is in a work by Spanish naturalist Francisco Hernández published posthumously in 1615, in which he describes the species as a large tree producing a fragrant gum resembling.

Liquidambar styraciflua. liquid amber, whence the genus name "Liquidambar." In John Ray's "Historia Plantarum" (1686) it is called "Styrax liquida". However, the first mention of any use of the amber is described by Juan de Grijalva, the nephew of the governor of Cuba, in the year 1517.Juan de Grijalva tells of gift exchanges with the Mayas "who presented them with, among other things, hollow reeds of about a span long filled with dried herbs and sweet-smelling liquid amber which, when lighted in the way shown by the natives, diffused an agreeable odour."The species was introduced into Europe in 1681 by John Banister,.

Liquidambar styraciflua. the missionary collector sent out by Bishop Compton, who planted it in the palace gardens at Fulham in London, England.## Fossil record.An ancestor of "Liquidambar styraciflua" is known from Tertiary-aged fossils in Alaska, Greenland, and the mid-continental plateau of North America, much further north than "Liquidambar" now grows. A similar plant is also found in Miocene deposits of the Tertiary of Europe.## Description.## Size."Liquidambar styraciflua" is a medium-sized to large tree, growing anywhere from 50 - 70 (ft) in cultivation and up to 150 (ft) in the wild, with a trunk up 2 - 3 (ft) in diameter, on average.

Liquidambar styraciflua. Trees may live to 400 years. The tree is a symmetrical shape and crowns into an egg shape when the branches get too heavy after its first two years of cultivation.## Bark and branches.Another distinctive feature of the tree is the peculiar appearance of its small branches and twigs. The bark attaches itself to these in plates edgewise instead of laterally, and a piece of the leafless branch with the aid of a little imagination readily takes on a reptilian form; indeed, the tree is sometimes called "alligatorwood".The bark is a light brown tinged with red and sometimes gray with.

Liquidambar styraciflua. dark streaks and has a density of 37 (lb/cuft). It is deeply fissured with scaly ridges. The branches carry layers of cork. The branchlets are pithy, many-angled, winged, and at first covered with rusty hairs, finally becoming red brown, gray or dark brown. As an ornamental tree, the species has a drawback—the branches may have ridges or "wings" that cause more surface area, increasing weight of snow and ice accumulation on the tree. However, the wood is heavy and hard with an interlocking grain, but is difficult to season.## Leaves.The leaves usually have five (but sometimes three or seven) sharply.

Liquidambar styraciflua. pointed palmate lobes. They are 3-5 (in) wide on average and have three distinct bundle scars.They are long and broad, with a 6 – 10 (cm) petiole. The rich dark green, smooth, shiny, star-shaped leaves generally turn brilliant yellow, orange, red, and purple colors in the autumn. This autumnal coloring has been characterized as not simply a flame, but a conflagration. Its reds and yellows compare to that of the maples ("Acer"), and in addition it has the dark purples and smoky browns of the ash "(Fraxinus)". However, in the northern part of its range, and where planted in yet.

Liquidambar styraciflua. colder areas, the leaves are often killed by frost while still green. On the other hand, in the extreme southern or tropical parts of its range, some trees are evergreen or semi-evergreen, with negligible fall color. The leaves are 3-7 (in) broad with glandular serrate teeth. The base is truncate or slightly heart-shaped. They come out of the bud plicate, downy, pale green, when full grown are bright green, smooth, shining above, paler beneath. They contain tannin and when bruised give a resinous fragrance.While the starry five-pointed leaves of "Liquidambar" resemble those of some maples ("Acer"), "Liquidambar" is easily distinguished.

Liquidambar styraciflua. from "Acer" by its glossy, leathery leaves that are positioned singly (alternate), not in pairs (opposite) on the stems. Luna and Promethea moth caterpillars feed on the leaves.## Flowers.The flowers typically appear in spring and persist into autumn/fall, sometimes persisting into winter. They are typically about 1 – 1+1/2 (in) in diameter and are covered with rusty hairs. The flowers are unisexual and greenish in color. Staminate flowers in terminal racemes 2-3 (in) long, the pistillate in a solitary head on a slender peduncle borne in the axil of an upper leaf. Staminate flowers destitute of calyx and corolla, but.

Liquidambar styraciflua. are surrounded by hairy bracts. Stamens indefinite; filaments short; anthers introrse. Pistillate flowers with a two-celled, two-beaked ovary, the carpels produced into a long, recurved, persistent style. The ovaries all more or less cohere and harden in fruit. There are many ovules but few mature.## Fruit.The distinctive compound fruit is hard, dry, and globose, 1 – 1+1/2 (in) in diameter, composed of numerous (40–60) capsules. Each capsule, containing one to two small seeds, has a pair of terminal spikes (for a total of 80–120 spikes). When the fruit opens and the seeds are released, each capsule is associated with a.

Liquidambar styraciflua. small hole (40–60 of these) in the compound fruit.Fallen, opened fruits are often abundant beneath the trees; these have been popularly nicknamed "burr (or bir) balls", "gum balls", "space bugs", "sticker balls", or "spike balls".The fruit is a multicapsular spherical head and hangs on the branches during the winter. The woody capsules are mostly filled with abortive seeds resembling sawdust. The seeds are about 1/4 (in) thick, winged, and wind-dispersed. Goldfinches, purple finches, squirrels, and chipmunks eat the seeds of the tree. The seeds stratify within 30–90 days at 33–41 (F) or soaked in water for 15–20 days.The long-stemmed fruit.

Liquidambar styraciflua. balls of "Liquidambar" resemble those of the American sycamore or buttonwood ("Platanus occidentalis"), but are spiny and remain intact after their seeds are dispersed; the softer fruits of "Platanus" disintegrate upon seed dispersal. The long-persisting fallen spiked fruits can be unpleasant to walk on; sweet gum is banned in some places for this reason. In abundance, they can leave a lawn lumpy. The winter buds are yellow brown, 1/4 (in) long, acute. The inner scales enlarge with the growing shoot, becoming 1/2 (in) long, green tipped with red.## Distribution.Sweetgum is one of the most common hardwoods in the southeastern United.

Liquidambar styraciflua. States, where it occurs naturally in lowlands from southwestern Connecticut south to central Florida, through central Ohio and west to Illinois, southern Missouri, and eastern Texas, but not colder highland areas of Appalachia or the Midwestern states. The species also occurs in Mexico from southern Nuevo León south to Chiapas, as well as in Guatemala, El Salvador, Nicaragua and Honduras. In Mexico and Central America, it is a characteristic plant of cloud forests, growing at middle elevations in various mountainous areas where the climate is humid and more temperate.The US government distribution maps for this species are incorrect concerning the.

Liquidambar styraciflua. southern limit of distribution in Florida. This species occurs abundantly at Highlands Hammock State Park, Sebring, Highlands County, FL, and even southwest of Lake Okeechobee. (see the Univ. South Florida Atlas of Florida Plants)Grown as an ornamental tree in Australia, "Liquidambar styraciflua" has a distribution on mainland Australia from southwestern Western Australia, southern South Australia, New South Wales, Victoria, and all the way up to the Atherton Tablelands in far North Queensland.## Uses.## Wood.Sweetgum "(Liquidambar styraciflua)" is one of the most important commercial hardwoods in the Southeastern United States. Its wood is bright reddish brown (with the sapwood nearly white).

Liquidambar styraciflua. and may have black grain in the heartwood; it is heavy, straight, satiny, and close-grained, but not strong. It takes a beautiful polish, but warps badly in drying. The wood has a specific gravity of 0.5910. It is too liable to decay for outdoor use.In the carpentry industry, the timber is referred to as satin walnut and is one of the most important materials for plywood manufacturers. It is used for furniture, interior trim, railroad ties, cigar boxes, crates, flooring, barrels, woodenware, and wood pulp. It is also used for veneer for plywood. The wood is very compact and fine-grained,.

Liquidambar styraciflua. the heartwood being reddish, and, when cut into planks, marked transversely with blackish belts. Sweetgum is used principally for lumber, veneer, plywood, slack cooperage, fuel, and pulpwood. The lumber is made into boxes and crates, furniture, cabinets for radios, televisions, and phonographs, interior trim, and millwork. The veneer and plywood, (typically backed with some other kind of wood which shrinks and warps less) are used for boxes, pallets, crates, baskets, and interior woodwork. It was formerly used in the interior finish of railroad sleeping cars. Being readily dyed black, it is sometimes substituted for ebony for such uses as inexpensive.

Liquidambar styraciflua. picture frames. The wood is also used to make chopsticks for the East Asian market, as it has a naturally light color with appeal to certain segments of the Asian market.## Resin.The tree's gum resin, for which the tree is named, exudes from the bark of the tree when wounded. It has many names, including liquid amber or copalm balsam. It is a kind of native balsam, or resin, resembling turpentine. It may be clear, reddish, or yellow, with a pleasant smell like ambergris. As the resin ages, it solidifies, the form in which it was historically exported in barrels.

Liquidambar styraciflua. The resin is produced by stripping, boiling, and pressing the tree's bark. The gum was used both medicinally and to make chewing gum.## Shikimic acid."L. styraciflua" seeds may be a renewable source of shikimic acid.## Cultivation."Liquidambar styraciflua" is a popular ornamental and forestal tree, cultivated for its distinctive foliage and intense autumn colors. It is commonly grown throughout its native North American range as well as many other temperate parts of the world, including moderately high elevations in the tropics. It is highly regarded in Bogota, Colombia. The species grows best in moist, acidic loam or clay soil, and tolerates.

Liquidambar styraciflua. poor drainage. It typically grows with other coastal plain species such as willow oak and sweetbay magnolia. Its salt tolerance is moderate. Chlorosis can develop on alkaline soil, especially where organic matter is low. Also, the American sweetgum tree does not grow well in shady areas.Among the many cultivars of "Liquidambar styraciflua" are (those marked have gained the Royal Horticultural Society's Award of Garden Merit): 'Burgundy' – dark red to purple fall colors may persist through winter 'Clydesform' – columnar or narrowly pyramidal; slow growth to 9 meters; yellow-orange fall colors; also sold as 'Emerald Sentinel' 'Festival' – columnar; pale.

Liquidambar styraciflua. green summer leaves; bright fall hues of yellow, pink and red; less hardy than most 'Firehouse' - pyramidal; bright red fall color; defoliates early; little to no seed production 'Goduzam' – variegated; pink to red-purple in autumn; also called 'Gold Dust' 'Grazam' – pyramidal, with glossy leaves. Orange, red and purple fall colors 'Gumball' – dwarf shrubby cultivar seldom more than 2 (m) tall, with purple-red fall color 'Lane Roberts' () 'Moraine' – upright, rounded form, fast growth, red fall color, hardy to −30 °C 'Palo Alto' – various shades of red in fall; best in California 'Parasol' – develops.

Liquidambar styraciflua. rounded crown; mature height 10 meters; deep red fall color 'Penwood' () 'Rotundiloba' – sterile cultivar with rounded lobes on leaves, originally discovered in North Carolina in the 1930s 'Slender Silhouette' – very narrow columnar form 'Worplesdon' () – cutleaf cultivar with orange, red and purple fall colorsThe organizers of the September 11th Memorial in New York donated a grove of sweetgum trees to the Flight 93 Memorial in Shanksville, Pennsylvania.## Infection on "Liquidambar styraciflua".The imperfect fungus "Dicarpella dryina" is a leaf parasite reported to occur on a wide range of host plants, including species of sweetgum ("Liquidambar styraciflua" ).

Liquidambar styraciflua. Limber and Cash reported that leaf spots produced by this pathogen on several different genera of forest trees were 2–5 mm diameter with regular margins. During the summer of 1994 in the Nacogdoches County area of Texas, a prominent leaf spot on sweetgum was widespread. Infected leaves had numerous necrotic lesions, each surrounded by a reddish halo. The lesions tended to merge resulting in large areas of dead tissue. Infection and fungal development of "D. dryina" were investigated on leaves of sweetgum using a combination of microscopic techniques. "D. dryina" infection on sweetgum has been associated with the disease red.

Liquidambar styraciflua. leaf spot. Results of this investigation indicate that "D. dryina" can penetrate leaf tissue directly, thus having the ability to initiate infection on both upper and lower leaf surfaces. In other regions of the U.S., sweetgum populations may not be as susceptible to local populations of this fungus.Environmental stress factors may also be involved, as reports have indicated that herbicide application and chlorosis caused by iron deficiency may increase susceptibility of "D. dryina". Tannins (a type of biomolecule found in trees to protect it from fire, insects, and bacteria) have been reported to occur in healthy tissue of a variety.

Liquidambar styraciflua. of plants including sweetgum. They may prevent pathogen invasion by inhibiting fungal enzyme activity. Although cells of healthy sweetgum tissue appear rich in tannins, these materials apparently were not effective in preventing fungal colonization by "D. dryina". Interactive Distribution Map for "Liquidambar styraciflua" University of Michigan – Dearborn: Native American Ethnobotany of "Liquidambar styraciflua" Landscaping.about.com: American Sweetgum Trees## External links.


Question: What is the parent organization of this aircraft?

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

De Havilland. The de Havilland Aircraft Company Limited () was a British aviation manufacturer established in late 1920 by Geoffrey de Havilland at Stag Lane Aerodrome Edgware on the outskirts of north London. Operations were later moved to Hatfield in Hertfordshire.Known for its innovation, de Havilland was responsible for a number of important aircraft, including the Moth biplane which revolutionised aviation in the 1920s; the 1930s Fox Moth, a commercial light passenger aircraft; the wooden World War II Mosquito multirole aircraft; and the pioneering passenger jet airliner Comet.The de Havilland company became a member of the Hawker Siddeley group in 1960, but.

De Havilland. lost its separate identity in 1963. Later, Hawker Siddeley merged into what is eventually known today as BAE Systems, the British aerospace and defence business. The de Havilland name lives on in De Havilland Canada, which owns the rights to the name and the aircraft produced by de Havilland's former Canadian subsidiary, including the Dash 8 regional airliner previously produced by Bombardier Aerospace.## History.## Origins.In January 1920 Geoffrey de Havilland was working for Airco as technical director and chief designer. BSA bought Airco on 20 January 1920 from George Holt Thomas on the say-so of one BSA director, Percy Martin,.

De Havilland. stronger. As a result, the Comet was extensively redesigned, with oval windows, structural reinforcements and other changes. Rival manufacturers meanwhile heeded the lessons learned from the Comet while developing their own aircraft. The Comet 4 enabled the de Havilland airliner to return to the skies in 1958. By then the United States had its Boeing 707 jet and the Douglas DC-8, both of which were faster and more economical to operate. Orders for the Comet dried up.Hawker Siddeley bought de Havilland in 1960 but kept it as a separate company until 1963. In that year it became the de Havilland.

De Havilland. Division of Hawker Siddeley Aviation and all types in production or development changed their designations from "DH" to "HS". De Havilland's final designs became the Hawker Siddeley Trident (originally the DH.121) and the innovative Hawker Siddley HS.125, originally the DH.125.The DH.121 design was modified to be smaller to fit the needs of one airline—British European Airways. Other airlines found it unattractive and turned to a rival tri-jet, the Boeing 727 which was much the same size as the initial DH.121 design. De Havilland, as Hawker Siddley, built only 117 Tridents, while Boeing went on to sell over 1,800 727s.De Havilland.

De Havilland. was established in March 1939, and work commenced on New Zealand's first aircraft factory at Rongotai. After World War II, the company undertook maintenance and refurbishment work until taken over by Hawker Siddeley International NZ Ltd in 1964. The site of the factory is now part of Wellington International Airport.## de Havilland Engines.As well as a prolific aircraft builder, de Havilland was also a significant producer of aero engines. This went against usual practice: usually engines are designed and produced by a dedicated company though in the UK the Bristol Aeroplane Company had a substantial engine business and Armstrong Whitworth.

De Havilland. Hertfordshire County Council for educational use: the site was then developed as Hatfield Technical College, which is now the College Lane Campus of the University of Hertfordshire. De Havilland was purchased by Hawker Siddeley in 1960 and merged into British Aerospace in 1978. The BAE site then closed in 1993, and the University of Hertfordshire purchased part of the site for the de Havilland Campus. Hatfield's aerospace history is recorded today in the names of local streets, such as Comet Way and Dragon Road.In September 2003 part of the former British aerospace site became the de Havilland campus of the.