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Vernier (aero-engine Manufacturer)
Vernier may refer to: * Vernier, Switzerland * Vernier (surname) * Pierre Vernier, French mathematician and inventor of the Vernier scale * Vernier scale, a secondary measuring device * Vernier thruster, a secondary control mechanism on spacecraft * Vernier throttle, a secondary control mechanism on aircraft * Vernier Software & Technology, an educational technology supplier * Vernier acuity, a type of visual acuity See also * Marais-Vernier * Veneer (other) {{disambiguation, surname ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vernier, Switzerland
Vernier () is a municipality in the Canton of Geneva, Switzerland. It is divided into different sections: Vernier Village, Le Lignon, Aïre, Les Avanchets, Cointrin and Châtelaine. Geography Vernier has an area, , of . Of this area, or 13.2% is used for agricultural purposes, while or 9.6% is forested. Of the rest of the land, or 72.5% is settled (buildings or roads), or 4.3% is either rivers or lakes and or 0.1% is unproductive land.Swiss Federal Statistical Office-Land Use Statistics 2009 data accessed 25 March 2010 Of the built up area, industrial buildings made up 10.0% of the total area while housing and buildings made up 32.8% and transportation infrastructure made up 15.9%. Power and water infrastructure as well as other special develo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vernier (surname)
Vernier is a French surname. Notable people with the surname include: *Émile Louis Vernier (1829–1887), French painter *Marie Vernier Marie Vernier or ''Venier'' (fl. 1590 – fl.1627), was a French stage actress, known also as Mlle La Porte. She is commonly thought to be the first French actress to be known by name. Life Vernier was from Sens, where her father was ''procureur a ... (fl. 1590–1627), French actress and theatre director * Pierre Vernier (1580–1637), French mathematician and engineer * Pierre Vernier (born 1931), French actor {{surname, Vernier French-language surnames ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pierre Vernier
Pierre Vernier (19 August 1580 at Ornans, Franche-Comté (at that time ruled by the Spanish Habsburgs, now part of France) – 14 September 1637, same location) was a French mathematician and instrument-inventor. He was the inventor and eponym of the vernier scale used in measuring devices. Life He was born in Ornans, France, in 1580. He was taught science by his father. He became captain and castellan of the castle at Ornans, for the King of Spain. He was also later councillor and director general of economy in the County of Burgundy. In Brussels, in the year 1631, Vernier published his treatise ''La construction, l'usage, et les propriétés du quadrant nouveau de mathématique'', and dedicated it to the Infanta. In it, he described the ingenious device which now bears his name, the vernier scale. To a quadrant with a primary scale in half degrees Vernier proposed to attach a movable sector, thirty-one half degrees in length but divided into thirty equal parts (each pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vernier Scale
A vernier scale, named after Pierre Vernier, is a visual aid to take an accurate measurement reading between two graduation markings on a linear scale by using mechanical interpolation, thereby increasing resolution and reducing measurement uncertainty by using vernier acuity to reduce human estimation error. It may be found on many types of instrument measuring linear or angular quantities, but in particular on a vernier caliper which measures internal or external diameter of hollow cylinders. The vernier is a subsidiary scale replacing a single measured-value pointer, and has for instance ten divisions equal in distance to nine divisions on the main scale. The interpolated reading is obtained by observing which of the vernier scale graduations is coincident with a graduation on the main scale, which is easier to perceive than visual estimation between two points. Such an arrangement can go to a higher resolution by using a higher scale ratio, known as the vernier constant. A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vernier Thruster
A vernier thruster is a rocket engine used on a spacecraft for fine adjustments to the attitude or velocity of a spacecraft. Depending on the design of a craft's maneuvering and stability systems, it may simply be a smaller thruster complementing the main propulsion system, or it may complement larger attitude control thrusters, or may be a part of the reaction control system. The name is derived from vernier calipers (named after Pierre Vernier) which have a primary scale for gross measurements, and a secondary scale for fine measurements. Vernier thrusters are used when a heavy spacecraft requires a wide range of different thrust levels for attitude or velocity control, as for maneuvering during docking with other spacecraft. On space vehicles with two sizes of attitude control thrusters, the main ACS (Attitude Control System) thrusters are used for larger movements, while the verniers are reserved for smaller adjustments. Due to their weight and the extra plumbing required ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vernier Throttle
A vernier throttle is a throttle often used in aircraft. It uses a cable and a screw mechanism to provide the operator precise control over an engine's operation. The concept is similar in use to vernier calipers which have a primary scale for gross measurements, and a secondary scale for fine measurements. Like other inventions that bear his name, the Vernier throttle is based on the work of mathematician Pierre Vernier. Vernier throttles are commonly used in aircraft. A similar mechanism is also used in reciprocating (gasoline) aircraft engines to set the mixture to an appropriate value for a given altitude. {{aircraft-stub Aircraft controls ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vernier Software & Technology
Vernier Software & Technology is an educational software company located in Beaverton, Oregon, that produces technology used for scientific education. Vernier is one of the first companies to popularize the use of computers and sensor technology, known as "probeware" or "Microcomputer Based Labs" (MBL), during laboratory experiments. History Vernier Software & Technology was founded in 1981 in Portland, Oregon, at the home of David Vernier, a high-school physics teacher, and Christine Vernier, a local business manager. The first software programs developed by David Vernier were scientific simulations for Apple II computers. In 1982, David developed the program ''Graphical Analysis'', which allowed an individual to manually enter data into a table and display the data as a graph. That year, the company started producing data-acquisition software and providing instructions for individuals to build their own sensors. Gradually, the company expanded the product line to include softw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vernier Acuity
Vernier acuity (from the term "vernier scale", named after astronomer Pierre Vernier) is a type of visual acuity – more precisely of hyperacuity – that measures the ability to discern a disalignment among two line segments or gratings. A subject's vernier (IPA: ) acuity is the smallest visible offset between the stimuli that can be detected. Because the disalignments are often much smaller than the diameter and spacing of retinal receptors, vernier acuity requires neural processing and "pooling" to detect it. Because vernier acuity exceeds acuity by far, the phenomenon has been termed hyperacuity. Vernier acuity develops rapidly during infancy and continues to slowly develop throughout childhood. At approximately three to twelve months old, it surpasses grating acuity in foveal vision in humans. However, vernier acuity decreases more quickly than grating acuity in peripheral vision. Vernier acuity was first explained by Ewald Hering in 1899, based on earlier data by Alfred V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marais-Vernier
Marais-Vernier () is a commune in the Eure department in Normandy in northern France. It is situated near the left bank of the Seine, at the edge of a wetland (the ''Marais Vernier'') formed by an old branch of the Seine. The wetland was cut off from the river with dams in the 17th century. Part of it is used for farming (cattle, Camargue horses, Scottish Highland Cattle), part is a protected area which is important for birds like storks. The village itself is situated on the edge of the wetland. Population See also *Communes of the Eure department The following is a list of the 585 communes of the Eure department of France. The communes cooperate in the following intercommunalities (as of 2020): [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
