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Voids
Void may refer to: Science, engineering, and technology * Void (astronomy), the spaces between galaxy filaments that contain no galaxies * Void (composites), a pore that remains unoccupied in a composite material * Void, synonym for vacuum, a space containing no matter * Void, a bubble within a mechanical part that causes cavitation when it collapses * Void, an unwanted air pocket formed during injection moulding * VoID or Vocabulary of Interlinked Datasets, an RDF vocabulary to enable the discovery and use of linked data sets * Void coefficient, the change in the reactivity of a nuclear reactor when voids form in moderator or coolant fluids * Void Linux, a Linux distribution * Void ratio, the volume of void-space to solid space in a material * Void safety, in object-oriented programming, a guarantee that no object references will have null values * Void type, in programming languages, a keyword indicating the absence of data * Void set or empty set, the mathematical set wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Void (astronomy)
Cosmic voids (also known as dark space) are vast spaces between filaments (the largest-scale structures in the universe), which contain very few or no galaxies. The cosmological evolution of the void regions differs drastically from the evolution of the Universe as a whole: there is a long stage when the curvature term dominates, which prevents the formation of galaxy clusters and massive galaxies. Hence, although even the emptiest regions of voids contain more than ~15% of the average matter density of the Universe, the voids look almost empty for an observer. Voids typically have a diameter of 10 to 100 megaparsecs (30 to 300 million light-years); particularly large voids, defined by the absence of rich superclusters, are sometimes called supervoids. They were first discovered in 1978 in a pioneering study by Stephen Gregory and Laird A. Thompson at the Kitt Peak National Observatory. Voids are believed to have been formed by baryon acoustic oscillations in the Big Bang, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Void (composites)
A void is a pore that remains unfilled with polymer and fibers in a composite material. Voids are typically the result of poor manufacturing of the material and are generally deemed undesirable. Voids can affect the mechanical properties and lifespan of the composite. They degrade mainly the matrix-dominated properties such as interlaminar shear strength, longitudinal compressive strength, and transverse tensile strength. Voids can act as crack initiation sites as well as allow moisture to penetrate the composite and contribute to the anisotropy of the composite. For aerospace applications, a void content of approximately 1% is still acceptable, while for less sensitive applications, the allowance limit is 3-5%. Although a small increase in void content may not seem to cause significant issues, a 1-3% increase in void content of carbon fiber reinforced composite can reduce the mechanical properties by up to 20% Void content in composites is represented as a ratio, also called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Void Coefficient
In nuclear engineering, the void coefficient (more properly called void coefficient of reactivity) is a number that can be used to estimate how much the reactivity of a nuclear reactor changes as voids (typically steam bubbles) form in the reactor moderator or coolant. Net reactivity in a reactor is the sum total of all these contributions, of which the void coefficient is but one. Reactors in which either the moderator or the coolant is a liquid typically will have a void coefficient value that is either negative (if the reactor is under-moderated) or positive (if the reactor is over-moderated). Reactors in which neither the moderator nor the coolant is a liquid (e.g., a graphite-moderated, gas-cooled reactor) will have a void coefficient value equal to zero. It is unclear how the definition of 'void' coefficient applies to reactors in which the moderator/coolant is neither liquid nor gas ( supercritical water reactor). Explanation Nuclear fission reactors run on nuclear chai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cavitation
Cavitation is a phenomenon in which the static pressure of a liquid reduces to below the liquid's vapour pressure, leading to the formation of small vapor-filled cavities in the liquid. When subjected to higher pressure, these cavities, called "bubbles" or "voids", collapse and can generate shock waves that may damage machinery. These shock waves are strong when they are very close to the imploded bubble, but rapidly weaken as they propagate away from the implosion. Cavitation is a significant cause of wear in some engineering contexts. Collapsing voids that implode near to a metal surface cause cyclic stress through repeated implosion. This results in surface fatigue of the metal causing a type of wear also called "cavitation". The most common examples of this kind of wear are to pump impellers, and bends where a sudden change in the direction of liquid occurs. Cavitation is usually divided into two classes of behavior: inertial (or transient) cavitation and non-inertial c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Voids (album)
''Voids'' is the sixth and final full-length album from Minus the Bear, released on March 3, 2017. It is their fourth full-length album to be released on Suicide Squeeze Records (and their first on the label since 2007's ''Planet of Ice'') and was produced by Sam Bell. It is their only album recorded with drummer Kiefer Matthias, who had joined the band in 2015 to replace Erin Tate. Track listing Personnel Minus the Bear * Jake Snider Jake Snider (born March 22, 1976) is the former lead vocalist and guitarist in the band Minus the Bear. He also plays guitar in Onalaska. He has previously been a part of the bands Sharks Keep Moving and State Route 522. He also plays guitar i ... - Lead vocals, Guitar * Dave Knudson - Guitar, Bass * Kiefer Matthias - Drums, Percussion * Cory Murchy - Bass * Alex Rose - Keyboards, Vocals Additional personnel * Produced by Sam Bell * Mastered by Greg Calbi References Minus the Bear albums 2017 albums Suicide Squeeze Records albums ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Void Ratio
The void ratio of a mixture is the ratio of the volume of voids to volume of solids. It is a dimensionless quantity in materials science, and is closely related to porosity as follows: :e = \frac = \frac = \frac and :\phi = \frac = \frac = \frac where e is void ratio, \phi is porosity, ''VV'' is the volume of void-space (such as fluids), ''VS'' is the volume of solids, and ''V''''T'' is the total or bulk volume. This figure is relevant in composites, in mining (particular with regard to the properties of tailings), and in soil science. In geotechnical engineering, it is considered one of the state variables of soils and represented by the symbol ''e''. Note that in geotechnical engineering, the symbol \phi usually represents the angle of shearing resistance, a shear strength (soil) parameter. Because of this, the equation is usually rewritten using n for porosity: :e = \frac = \frac = \frac and :n = \frac = \frac = \frac where e is void ratio, n is porosity, ''VV'' is the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Injection Moulding
Injection moulding (U.S. spelling: injection molding) is a manufacturing process for producing parts by injecting molten material into a mould, or mold. Injection moulding can be performed with a host of materials mainly including metals (for which the process is called die-casting), glasses, elastomers, confections, and most commonly thermoplastic and thermosetting polymers. Material for the part is fed into a heated barrel, mixed (using a helical screw), and injected into a mould cavity, where it cools and hardens to the configuration of the cavity. After a product is designed, usually by an industrial designer or an engineer, moulds are made by a mould-maker (or toolmaker) from metal, usually either steel or aluminium, and precision-machined to form the features of the desired part. Injection moulding is widely used for manufacturing a variety of parts, from the smallest components to entire body panels of cars. Advances in 3D printing technology, using photopolymers that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VoID
Void may refer to: Science, engineering, and technology * Void (astronomy), the spaces between galaxy filaments that contain no galaxies * Void (composites), a pore that remains unoccupied in a composite material * Void, synonym for vacuum, a space containing no matter * Void, a bubble within a mechanical part that causes cavitation when it collapses * Void, an unwanted air pocket formed during injection moulding * VoID or Vocabulary of Interlinked Datasets, an RDF vocabulary to enable the discovery and use of linked data sets * Void coefficient, the change in the reactivity of a nuclear reactor when voids form in moderator or coolant fluids * Void Linux, a Linux distribution * Void ratio, the volume of void-space to solid space in a material * Void safety, in object-oriented programming, a guarantee that no object references will have null values * Void type, in programming languages, a keyword indicating the absence of data * Void set or empty set, the mathematical set with no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Void Type
The void type, in several programming languages derived from C and Algol68, is the return type of a function that returns normally, but does not provide a result value to its caller. Usually such functions are called for their side effects, such as performing some task or writing to their output parameters. The usage of the void type in such context is comparable to procedures in Pascal and syntactic constructs which define subroutines in Visual Basic. It is also similar to the unit type used in functional programming languages and type theory. See Unit type#In programming languages for a comparison. C and C++ also support the pointer to void type (specified as void *), but this is an unrelated notion. Variables of this type are pointers to data of an ''unspecified'' type, so in this context (but not the others) void * acts roughly like a universal or top type. A program can probably convert a pointer to any type of data (except a function pointer) to a pointer to void and b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Void (Vanna Album)
''VOID'' is the fifth studio album by the punk rock band Vanna. It was released in 2014 on Pure Noise Records. The album was the band's first release on the record company. It marks a change to their sound, as it is more melodic and aggressive than their previous releases. The band streamed the album on SoundCloud in full a week before release. The album had its highest release and first appearance on the Billboard top 200, with sales over 1800+ copies and charting at #157 along with charting on Heatseeker (#20). This was attributed to their successful performance on the 2014 Vans Warped Tour. Track listing Personnel ;Vanna *Davey Muise – vocals *Nicholas Lambert – guitar *Joel Pastuszak – guitar, vocals *Shawn Marquis – bass, vocals *Eric Gross – drums ;Production *Produced, mixed and mastered by Will Putney at The Machine Shop, Weehawken Weehawken is a township in the northern part of Hudson County, in the U.S. state of New Jersey. It is located largely on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Void (Intronaut Album)
''Void'' is the debut full-length studio album by American post-metal band Intronaut. It was released on August 23, 2006 in the United States through Goodfellow Records. Track listing Credits Band members * Sacha Dunable − guitar, vocals * Leon del Muerte − guitar, vocals * Joe Lester − bass * Danny Walker − drums A drum kit (also called a drum set, trap set, or simply drums) is a collection of drums, cymbals, and other Percussion instrument, auxiliary percussion instruments set up to be played by one person. The player (drummer) typically holds a pair o ..., samples Other * Recorded and mixed by John Haddad at the Trench Studios * Logo, illustrations and layout by Justin Bartlett References {{Authority control Intronaut albums 2006 debut albums ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VOID (NaNa Album)
NaNa (Japanese ナナ) is a Japanese musical duo from Tokyo, Japan, consisting of Chikako Watanabe and Shigeo Tamaru . Their music draws on several influences including alternative rock, experimental rock, trip hop and downtempo. History Watanabe (vocal) and Tamaru (guitar/producer) came together to form NaNa in 1996. NaNa's chief goal was to create high quality demo tapes that would showcase their music to the world market. In the summer of 1997, NaNa got an offer from Ryuichi Sakamoto to be on his Radio show, and they appeared on the program. This led NaNa into their debut from Sakamoto's label. NaNa's first EP topped the Indies chart including Tower Records in Tokyo. Afterward they released two albums and four EP from Gut/Forlife label and Warner Music Japan. In 2007, they started digital distribution on iTunes and Amazon. Then they have since increased the number of the listeners little by little in different countries. Starting in 2007, NaNa's tracks have gradually received ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
