|
Chevron B16 - 001
Chevron (often relating to V-shaped patterns) may refer to: Science and technology * Chevron (aerospace), sawtooth patterns on some jet engines * Chevron (anatomy), a bone * ''Eulithis testata'', a moth * Chevron (geology), a fold in rock layers * Chevron (land form), a sediment deposit across the earth's surface * Chevron nail, a rare transient fingernail ridge pattern seen in children * Chevron plot, a way of representing data Organisations * ''The Chevron'', former newspaper at the University of Waterloo, Ontario, Canada * Chevron Corporation, an American multinational energy corporation ** ''Chevron U.S.A., Inc. v. Natural Resources Defense Council, Inc.'', 467 U.S. 837 (1984), a United States Supreme Court case dealing with administrative law * Chevron Cars Ltd, a British racing car constructor * Chevron Engineering Ltd, a New Zealand car maker People * Philip Chevron (1957–2013), Irish singer/songwriter * The Chevrons, an American pop group Places * Chevron, W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chevron (aerospace)
The turbofan or fanjet is a type of airbreathing jet engine that is widely used in aircraft propulsion. The word "turbofan" is a portmanteau of "turbine" and "fan": the ''turbo'' portion refers to a gas turbine engine which achieves mechanical energy from combustion, and the ''fan'', a ducted fan that uses the mechanical energy from the gas turbine to force air rearwards. Thus, whereas all the air taken in by a turbojet passes through the combustion chamber and turbines, in a turbofan some of that air bypasses these components. A turbofan thus can be thought of as a turbojet being used to drive a ducted fan, with both of these contributing to the thrust. The ratio of the mass-flow of air bypassing the engine core to the mass-flow of air passing through the core is referred to as the bypass ratio. The engine produces thrust through a combination of these two portions working together; engines that use more jet thrust relative to fan thrust are known as ''low-bypass turb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hebron
Hebron ( ar, الخليل or ; he, חֶבְרוֹן ) is a State of Palestine, Palestinian. city in the southern West Bank, south of Jerusalem. Nestled in the Judaean Mountains, it lies Above mean sea level, above sea level. The second-largest city in the West Bank (after East Jerusalem), and the third-largest in the Palestinian territories (after East Jerusalem and Gaza City, Gaza), it has a population of over 215,000 Palestinians (2016), and seven hundred Israeli settlement, Jewish settlers concentrated on the outskirts of its Old City of Hebron, Old City. It includes the Cave of the Patriarchs, which Jewish, Christian, and Islamic traditions all designate as the burial site of three key Patriarchs (Bible), patriarchal/Patriarchs (Bible), matriarchal couples. The city is often considered one of the Four Holy Cities, four holy cities in Judaism. as well as in Islam. Hebron is considered one of the oldest cities in the Levant. According to the Bible, Abraham settled in Hebr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rank Insignia
An insignia () is a sign or mark distinguishing a group, grade, rank, or function. It can be a symbol of personal power or that of an official group or governing body. On its own, an insignia is a sign of a specific or general authority and is usually made of metal or fabric. Together, insignias form a decoration with the different elements of a rank, grade, or dignity. There are many types of insignia, including civil and military decorations, crowns, emblems, and coats of arms. Singular/plural "Insignia" can be used either as a plurale tantum word, i.e. unchanged for both singular and plural, or it can take the plural form "insignias", both equally valid options. The singular "insigne" is rarely used. History The use of insignias predates history, both for personal and group (especially military) use. When the insignia was meant to be seen, it was placed at top of a pole or the head of a spear. The Persians used a golden eagle as an insignia, the Assyrians a dove, and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Advanced Combat Optical Gunsight
The Advanced Combat Optical Gunsight (ACOG) is a series of prismatic telescopic sights manufactured by Trijicon. The ACOG was originally designed to be used on the M16 rifle and M4 carbine, but Trijicon has also developed ACOG accessories for other firearms. Models provide fixed-power magnification levels from 1.25× to 6×. ACOG reticles are illuminated at night by an internal tritium phosphor. Some versions have an additional daytime reticle illumination via a passive external fiberoptic light pipe or are LED-illuminated using a dry battery. The first ACOG model, known as the TA01, was released in 1987. History The first ACOG model, known as the TA01, was released in 1987. In 1995, United States Special Operations Command selected the 4×32 TA01 as the official scope for the M4 carbine and purchased 12,000 units from Trijicon. Between 2004 and 2005, the ACOG was selected as the official Rifle Combat Optic of the United States Marine Corps, prompting Trijicon to produ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trill (music)
The trill (or shake, as it was known from the 16th until the early 20th century) is a musical ornament consisting of a rapid alternation between two adjacent notes, usually a semitone or tone apart, which can be identified with the context of the trillTaylor, Eric. ''The AB Guide to Music Theory: Part I'', p. 92. (compare mordent and tremolo). It is sometimes referred to by the German Triller, the Italian trillo, the French trille or the Spanish trino. A cadential trill is a trill associated with each cadence. A trill provides rhythmic interest, melodic interest, and—through dissonance—harmonic interest. Sometimes it is expected that the trill will end with a turn (by sounding the note below rather than the note above the principal note, immediately before the last sounding of the principal note), or some other variation. Such variations are often marked with a few appoggiaturas following the note bearing the trill indication. Notation In most modern musical notatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
