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A vacuum (pl.: vacuums or vacua) is space devoid of matter. The word is derived from the Latin adjective vacuus (neuter vacuum) meaning "vacant" or "void"...

A vacuum tube, electron tube, thermionic valve (British usage), or tube (North America) is a device that controls electric current flow in a high vacuum...

A vacuum cleaner, also known simply as a vacuum (or a hoover in the UK), is a device that uses suction, and often agitation, in order to remove dirt and...

VACUUM is a set of normative guidance principles for achieving training and test dataset quality for structured datasets in data science and machine learning...

In quantum field theory, a false vacuum is a hypothetical vacuum state that is locally stable but does not occupy the most stable possible ground state...

The speed of light in vacuum, often called simply the speed of light and commonly denoted c, is a universal physical constant exactly equal to 299792458 m⋅s−1...

Vacuum is the absence of matter, or the very high, but imperfect, vacuum of the Solar System and interstellar space. Vacuum may also refer to: Vacuum...

The vacuum magnetic permeability (variously vacuum permeability, permeability of free space, permeability of vacuum, magnetic constant) is the magnetic...

Vacuum permittivity, commonly denoted ε0 (pronounced "epsilon nought" or "epsilon zero"), is the value of the absolute dielectric permittivity of classical...

A vacuum flask (also known as a Dewar flask, Dewar bottle or thermos) is an insulating storage vessel that slows the speed at which its contents change...

Vacuum induction melting (VIM) utilizes electric currents to melt metal within a vacuum. The first prototype was developed in 1920. Induction heating...

Vacuum or suction aspiration is a procedure that uses a vacuum source to remove an embryo or fetus through the cervix. The procedure is performed to induce...

and political history, the term power vacuum, also known as a power void, is an analogy between a physical vacuum to the political condition "when someone...

Vacuum energy is an underlying background energy that exists in space throughout the entire universe. The vacuum energy is a special case of zero-point...

A vacuum arc can arise when the surfaces of metal electrodes in contact with a good vacuum begin to emit electrons either through heating (thermionic emission)...

vacuum) or the QCD vacuum which deals with quantum chromodynamics (e.g., color charge interactions between quarks, gluons and the vacuum). A vacuum can...

Vacuum consolidation (or vacuum preloading) is a soft soil improvement method that has been successfully used by geotechnical engineers and specialists...

A robotic vacuum cleaner, sometimes called a robovac, is an autonomous vacuum cleaner which has a limited vacuum floor cleaning system combined with sensors...

Look up quantum or vacuum in Wiktionary, the free dictionary. The quantum vacuum state or simply quantum vacuum is the state with the lowest possible energy...

A vacuum bed is a device sometimes used in BDSM play. A person is placed in a latex envelope spanned by a frame and a suction pump or floor vacuum removes...

Vacuum extraction (VE), also known as ventouse (French for suction cup), is a method to assist delivery of a baby using a vacuum device. It is used in...

Vacuum packing is a method of packaging that removes air from the package prior to sealing. This method involves placing items in a plastic film package...

A vacuum truck, vacuum tanker, vactor truck, vactor, vac-con truck, vac-con is a tank truck that has a pump and a tank. The pump is designed to pneumatically...

A vacuum airship, also known as a vacuum balloon, is a hypothetical airship that is evacuated rather than filled with a lighter-than-air gas such as hydrogen...

A vacuum-tube computer, now termed a first-generation computer, is a computer that uses vacuum tubes for logic circuitry. While the history of mechanical...

The vacuum exercise is an exercise which involves contracting some internal abdominal muscles, primarily the transverse abdominal muscle, and not as much...

Vacuum distillation or distillation under reduced pressure is a type of distillation performed under reduced pressure, which allows the purification of...

non-gimbaling vacuum-optimized Raptor Vacuum engines would provide primary thrust for the second stage, for a total of nine engines. Raptor Vacuums were envisioned...

Henry is a cylinder vacuum cleaner brand by Numatic International, and is the only mass-produced consumer vacuum cleaner still made in the United Kingdom...

The solutions to the vacuum field equations are called vacuum solutions. Flat Minkowski space is the simplest example of a vacuum solution. Nontrivial...

In quantum field theory, the quantum vacuum state (also called the quantum vacuum or vacuum state) is the quantum state with the lowest possible energy...

Socony merged with Vacuum Oil Company, from which the Mobil name first originated, in 1931 and subsequently renamed itself to "Socony-Vacuum Oil Company"....

bagless vacuum cleaners (using cyclonic separation and brushless electric motors), heatless hand dryers, bladeless fans/heaters, and robotic vacuum cleaners...

The Vacuum is a free newspaper published in Belfast, Northern Ireland by the arts organisation Factotum. Each issue is themed and contains critical commentary...

A vacuum insulated panel (VIP) is a form of thermal insulation consisting of a gas-tight enclosure surrounding a rigid core, from which the air has been...

A vacuum pump is a type of pump device that draws gas particles from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was...

In electrical engineering, a vacuum interrupter is a switch which uses electrical contacts in a vacuum. It is the core component of medium-voltage circuit-breakers...

material interfaces, such as electrical conductors and dielectrics, alters the vacuum expectation value of the energy of the second-quantized electromagnetic...

In quantum physics, a quantum fluctuation (also known as a vacuum state fluctuation or vacuum fluctuation) is the temporary random change in the amount...

Vacuum bag may refer to: Vacuum packing of vacuum-sealed bags Vacuum bag moulding The dustbag of a Vacuum cleaner This disambiguation page lists articles...

Vacuum cooling is a rapid cooling technique for any porous product that has free water and uses the principle of evaporative cooling. Vacuum cooling is...

A vacuum chamber is a rigid enclosure from which air and other gases are removed by a vacuum pump. This results in a low-pressure environment within the...

Look up vacuum catastrophe in Wiktionary, the free dictionary. Vacuum catastrophe can mean: the cosmological constant problem in cosmology the divergence...

The vacuum brake is a braking system employed on trains and introduced in the mid-1860s. A variant, the automatic vacuum brake system, became almost universal...

Vacuum valve may refer to: Trickle valve, a type of airlock Vacuum breaker, an anti-siphon valve Vacuum delay valve, an automobile component Vacuum tube...

In general relativity, a vacuum solution is a Lorentzian manifold whose Einstein tensor vanishes identically. According to the Einstein field equation...

A vacuum bazooka is a pipe-based cannon which uses a vacuum pump (often a vacuum cleaner) to reduce pressure in front of the projectile and therefore propel...

A central vacuum cleaner (also known as built-in or ducted) is a type of vacuum cleaner appliance installed into a building as a semi-permanent fixture...

Vacuum drying is the mass transfer operation in which the moisture present in a substance, usually a wet solid, is removed by means of creating a vacuum...

A thermobaric weapon, also called an aerosol bomb, or a vacuum bomb, is a type of explosive munition that works by dispersing an aerosol cloud of gas,...

A vacuum breaker is a device that prevents water from being siphoned backward in a direction it is not desired to go. They are commonly placed on a bibcock...

420 kN (95,000 lbf) in vacuum, and performing with a specific impulse of 261 s (2.56 km/s) at sea level and 303 s (2.97 km/s) in vacuum. The Merlin 1B was...

Vacuum bubble may refer to Vacuum bubbles in quantum field theory Vacuum bubbles in cosmology Vacuum bubbles in hydrodynamics This disambiguation page...

Edwards Ltd is a British multinational vacuum pump and exhaust gas management systems manufacturer. Its headquarters are in Burgess Hill, UK, and has been...

pressure and vacuum. Instruments used to measure and display pressure mechanically are called pressure gauges, vacuum gauges or compound gauges (vacuum & pressure)...

Vacuum forming is a simplified version of thermoforming, where a sheet of plastic in various forms of high-impact polystyrene sheet (HIPS) for low impact...

ineffective. Physical techniques involve extension devices, hanging weights, and vacuum pressure. There is also significant overlap between techniques intended...

In chemistry, a vacuum oven is an oven that can also apply a vacuum to its contents. Such devices are useful for removing solvent or dehydrating samples...

The QCD vacuum is the quantum vacuum state of quantum chromodynamics (QCD). It is an example of a non-perturbative vacuum state, characterized by non-vanishing...

households: corded vacuum cleaners. cordless vacuum cleaners robotic vacuum cleaners mini or handheld vacuum cleaners and window vacuums cleaners For decades...

A vacuum mattress, or vacmat, is a medical device used for the immobilisation of patients, especially in case of a vertebra, pelvis or limb trauma (especially...

In quantum field theory, and specifically quantum electrodynamics, vacuum polarization describes a process in which a background electromagnetic field...

In cavity quantum electrodynamics, a vacuum Rabi oscillation is a damped oscillation of an initially excited atom coupled to an electromagnetic resonator...

of European Mullard–Philips vacuum tubes and their American equivalents. Most post-war European thermionic valve (vacuum tube) manufacturers have used...

In organic chemistry. flash vacuum pyrolysis (FVP) is a technique that entails heating a precursor molecule intensely and briefly, often in an argon atmosphere...

A vacuum ejector, or simply ejector, or aspirator, is a type of vacuum pump, which produces vacuum by means of the Venturi effect. In an ejector, a working...

Superfluid vacuum theory (SVT), sometimes known as the BEC vacuum theory, is an approach in theoretical physics and quantum mechanics where the fundamental...

In theoretical physics, particularly fringe physics, polarizable vacuum (PV) and its associated theory refer to proposals by Harold Puthoff, Robert H....

hypoallergenic vacuum cleaner is a vacuum cleaner with filters designed to retain the vast majority (ideally at least 99.97%) of particles within the vacuum system...

Vacuum Oil Company was an American oil company. After being taken over by the original Standard Oil Company and then becoming independent again, in 1931...

A vacuum fryer is a deep-frying device housed inside a vacuum chamber. With vacuum frying it is easier to maintain natural colors and flavours of the finished...

A vacuum engine refers to any kind of engine which derives its force from air pressure against one side of the piston, while also having a partial vacuum...

Vacuum Modulator is an engine load sensing device that converts engine vacuum into a transmission valve body input. Most vacuum modulators operate with...

A vacuum servo (also called a brake booster, power booster, or power brake unit) is a component used on motor vehicles in their braking system, to provide...

In large scale oceanic civil engineering, vacuum-anchors are used to anchor gravity-based structures (such as the Troll A Oil Platform) in the soft bottomed...

Vacuum casting is a casting process for elastomers using a vacuum to draw the liquid material into the mold. This process is used when air entrapment...

vacuum sewer or pneumatic sewer system is a method of transporting sewage from its source to a sewage treatment plant. It maintains a partial vacuum,...

Unsolved problem in physics Why is the vacuum energy density much smaller than a zero-point energy suggested by quantum field theory? More unsolved problems...

physics, the vacuum level refers to the energy of a free stationary electron that is outside of any material (it is in a perfect vacuum). It may be taken...

Vacuum cementing or vacuum welding is the natural process of solidifying small objects in a hard vacuum.[clarification needed] The most notable example...

field theory, the theta vacuum is the semi-classical vacuum state of non-abelian Yang–Mills theories specified by the vacuum angle θ that arises when...

Manifold vacuum, or engine vacuum in a petrol engine is the difference in air pressure between the engine's intake manifold and Earth's atmosphere. Manifold...

Vacuum melting may refer to : Vacuum induction melting Vacuum arc remelting Any melting in a Vacuum furnace Vacuum metallurgy This disambiguation page...

Vacuum evaporation is the process of causing the pressure in a liquid-filled container to be reduced below the vapor pressure of the liquid, causing the...

is frozen and its water is allowed to sublime under reduced pressure or vacuum. The loss of snow from a snowfield during a cold spell is often caused by...

have longer wavelengths. Wavelength depends on the medium (for example, vacuum, air, or water) that a wave travels through. Examples of waves are sound...

Vacuum casting may refer to: Casting (filling), the general casting concept of using a vacuum to fill a mold cavity Vacuum casting (elastomers), the casting...

England, the company designs and manufactures household appliances such as vacuum cleaners, air purifiers, hand dryers, bladeless fans, heaters, hair dryers...

Vacuum deposition is a group of processes used to deposit layers of material atom-by-atom or molecule-by-molecule on a solid surface. These processes operate...

In astrophysics, a gravastar (a blend word of "gravitational vacuum star") is an object hypothesized in a 2001 paper by Pawel O. Mazur and Emil Mottola...

unit computers, vacuum switches were employed to regulate the flow of engine vacuums in automobiles. For instance, a dual port vacuum switch located in...

A vacuum coffee maker brews coffee using two chambers where vapor pressure and gravity produce coffee. This type of coffee maker is also known as vac pot...

Vacuum activities (or vacuum behaviours) are innate fixed action patterns (FAPs) of animal behaviour that are performed in the absence of a sign stimulus...

An atmospheric vacuum breaker (AVB) is a backflow prevention device used in plumbing to prevent backflow of non-potable liquids into the drinking water...

Henry is a series of canister vacuum cleaners which were first manufactured by Numatic International in 1981, and are most notable for their human-like...

A vacuum arc thruster (VAT) is a form of electric spacecraft propulsion. It uses a vacuum arc discharge, across an insulator, between two electrodes to...

High vacuum may refer to: A vacuum with pressure in the range from 100 mPa to 100 nPa High Vacuum, the 1957 novel by Charles Eric Maine See also: Ultra-high...

The QED vacuum or quantum electrodynamic vacuum is the field-theoretic vacuum of quantum electrodynamics. It is the lowest energy state (i.e., the ground...

quantum field theory, the vacuum expectation value (VEV) of an operator is its average or expectation value in the vacuum. The vacuum expectation value of...

A mercury vacuum is a vacuum cleaner specifically designed to collect mercury metal, for instance to clean up spills of the element. It is a requirement...

A vacuum splint is a device like a small vacuum mattress that is used in emergency medicine as a temporary splint. Vacuum splints operate by extracting...

The Schlenk line (also vacuum gas manifold) is a commonly used chemistry apparatus developed by Wilhelm Schlenk. It consists of a dual manifold with several...

A vacuum flange is a flange at the end of a tube used to connect vacuum chambers, tubing and vacuum pumps to each other. Vacuum flanges are used for scientific...

Pfeiffer Vacuum Technology AG is a German manufacturer of vacuum pumps. It is headquartered in Aßlar in Germany with 70% of the total production catering...

Vacuum bag moulding is the primary composite manufacturing process for producing laminated structures. It is common in the aerospace industry. It utilizes...

Molecular distillation is vacuum distillation below the pressure of 0.01 torr. 0.01 torr is one order of magnitude above high vacuum, where fluids are in the...

Vacuum molding most commonly refers to the metal casting process. It may also refer to: Vacuum forming, a plastic forming process Vacuum bag molding, a...

A vacuum variable capacitor is a variable capacitor which uses a high vacuum as the dielectric instead of air or other insulating material. This allows...

The Quantum Vacuum: An Introduction to Quantum Electrodynamics is a physics textbook written by Peter W. Milonni in 1993. The book covers zero-point energy...

An automated vacuum waste collection system, also known as pneumatic refuse collection, or automated vacuum collection (AVAC), transports waste at high...

Vacuum grease is a lubricant with low volatility and is used for applications in low pressure environments. Lubricants with higher volatility would evaporate...

Legal vacuum may refer to: A legal context which is non liquet ("it is not clear"), there is no applicable law, or in which some injustice is uncorrected...

Vacuum is a Swedish pop band consisting of Mattias Lindblom and Anders Wollbeck. They also work as song writers and producers under the same name. As songwriters...

in flat space. This state is usually called the Bunch–Davies vacuum or Euclidean vacuum, actually was first obtained by N.A. Chernikov and E. A. Tagirov...

It is one of the major producers of vacuum cleaners in the United Kingdom, producing the Henry domestic vacuum cleaner and its related models, which...

Lagrangian describes the non-linear dynamics of electromagnetic fields in vacuum and is consequently an example of nonlinear electrodynamics. It was first...

method of thin-film deposition. The source material is evaporated in a vacuum. The vacuum allows vapor particles to travel directly to the target object (substrate)...

mansion to rescue Mario and battles ghosts by capturing them through a vacuum cleaner supplied by Professor E. Gadd. Luigi's Mansion received a positive...

Vacuum Assisted Resin Transfer Molding (VARTM) or Vacuum Injected Molding (VIM) is a closed mold, out of autoclave (OOA) composite manufacturing process...

Vacuum metallurgy is the field of materials technology that deals with making, shaping, or treating metals in a controlled atmosphere, at pressures significantly...

Vacuum Diagrams is a collection of science fiction short stories by British writer Stephen Baxter. The collection connects the novels of the Xeelee Sequence...

Vacuum Flowers is a science fiction novel by American writer Michael Swanwick, published in 1987. It is an early example of the cyberpunk genre, and features...

science does not equate vacuum with nothing. The vacuum in quantum field theory is filled with virtual particles. The quantum vacuum is often viewed as a...

A vacuum fluorescent display (VFD) is a display device once commonly used on consumer electronics equipment such as video cassette recorders, car radios...

A vacuum furnace is a type of furnace in which the product in the furnace is surrounded by a vacuum during processing. The absence of air or other gases...

improve cardiopulmonary function are employed. An alternative to surgery, the vacuum bell, was described in 2006; the procedure is also referred to as treatment...

thermal conductivity gauge used for the measurement of the pressures in vacuum systems. It was invented in 1906 by Marcello Pirani. Marcello Stefano Pirani...

pump rotates. This type of pump is considered less suitable than other vacuum pumps for high-viscosity and high-pressure fluids[citation needed], and...

"Love in a Vacuum" is a song by American band 'Til Tuesday, which was released in 1985 as the third and final single from their debut studio album Voices...

chamber, and a vacuum pump to keep the vacuum chamber below ambient enough pressure. The workpiece is placed on the top of the vacuum chamber and thus...

chamber Vacuum distillation Vacuum evaporation Vacuum flange Vacuum furnace Vacuum gauge Vacuum grease Vacuum oven Vacuum packing Vacuum pump Vacuum tube...

Vacuum cooking may refer to: Vacuum flask cooking Sous-vide, a type of sealing vacuum cooking Sousvide Supreme This disambiguation page lists articles...

Vacuum arc remelting (VAR) is a secondary melting process for production of metal ingots with elevated chemical and mechanical homogeneity for highly demanding...

vacuum switches, vacuum motors, and other vacuum devices. The engine in a common automobile produces almost 20 inches of mercury (68 kPa) of vacuum,...

Materials for use in vacuum need to be materials that show very low rates of outgassing in vacuum and, where applicable, are tolerant to bake-out temperatures...

or solar cells where the current of interest is the reverse current. In vacuum tubes (including cathode ray tubes) it is the negative terminal where electrons...

The British Vacuum Council (BVC) is the link between scientists and engineers within the UK and the International Union for Vacuum Science, Technique and...

Vacuum is a quarterly peer-reviewed scientific journal published by the Elsevier. Founded in 1951, the journal covers the fundamental research and technical...

Gravity-vacuum transit (GVT) was a form of transportation developed by American inventor Lawrence Edwards in the early 1960s. The origin of this technology...

Vacuum column may refer to A device used in vacuum distillation A feature of a tape drive that serves as a low-inertia magnetic tape buffer: 9-track tape#Typical...

The Standard Vacuum Oil Company was an American joint venture by Standard Oil of New Jersey and Socony-Vacuum Oil (aka Mobil) established in 1931 to make...

Ultra-high vacuum (often spelled ultrahigh in American English, UHV) is the vacuum regime characterised by pressure lower than about 1×10−9 torrs (1×10−9 mbar;...

Goblin Vacuum Cleaners was a British brand of vacuum cleaners made from the early 1900s until the early 2000s. In the early 1930s, Goblin vacuum cleaners...

(5) Safety Vacuum Release System (SVRS) - The term 'safety vacuum release system' means a vacuum release system capable of providing vacuum release at...

A pressure vacuum breaker (PVB) is a type of backflow prevention device, used to keep non-potable (or contaminated) water from entering the water supply...

A nanoscale vacuum-channel transistor (NVCT) is a transistor in which the electron transport medium is a vacuum, much like a vacuum tube. In a traditional...

The manual vacuum cleaner was a type of non-electric vacuum cleaner, using suction to remove dirt from carpets, being powered by human muscle, similar...

A thermal vacuum chamber (TVAC) is a vacuum chamber in which the radiative thermal environment is controlled. Typically the thermal environment is achieved...

Vacuum filtration is a fast filtration technique used to separate solids from liquids. By flowing through the aspirator, water will suck out the air contained...

Lovetune for Vacuum is the debut album by Austrian musical project Soap&Skin, released in 2009 on PIAS Recordings. It is listed as #38 on musicOMH's Top...

Glatten, Germany. The family-run company is one of the leading suppliers of vacuum technology in the fields of automation and manual handling and is also active...

business as The Kirby Company (stylized as KIRBY), is a manufacturer of vacuum cleaners, home cleaning products and accessories, located in Cleveland,...

Vacuum tube characteristics (also called tube curves, valve characteristics or valve curves) describes the electrical relationships between electrode voltages...

founded the Dyson company. He is best known as the inventor of the bagless vacuum cleaner, which works on the principle of cyclonic separation. In the Sunday...

in which he deliberately suffocated two kittens in a plastic bag with a vacuum cleaner. He later published a second video of himself, this time drowning...

in free space) is equal to the product of the vacuum permeability μ0 and the speed of light in vacuum c. Before 2019, the values of both these constants...

Sous vide (/suː ˈviːd/; French for 'under vacuum'), also known as low-temperature, long-time (LTLT) cooking, is a method of cooking invented by the French...

the Kerr vacuum family (two parameters). In this sense, the Kerr vacuums are the simplest stationary axisymmetric asymptotically flat vacuum solutions...

A vacuum filler is a machine used for filling pasty products. The pasty products are moved with the aid of a vane cell feed system under a vacuum. Levelling...

under the term vacuum casting. Vacuum pressure casting (VPC), properly referred to as vacuum assist direct pour, uses gas pressure and a vacuum to improve...

Negative-pressure wound therapy (NPWT), also known as a vacuum assisted closure (VAC), is a therapeutic technique using a suction pump, tubing, and a dressing...

The Korean Vacuum Society (KMS; Korean: 한국진공학회) is an academic organization in South Korea incorporated under the Ministry of Science and ICT. Their work...

effects had never been experimentally observed. While the speed of light in vacuum is a universal constant (c = 299,792,458 m/s), the speed in a material may...

A vacuum ceramic filter is designed to separate liquids from solids for dewatering of ore concentrates purposes. The device consists of a rotator, slurry...

spacetime vacuum lacking vacuum energy). Quantum mechanics heavily favors smaller fluctuations that "borrow" the least amount of energy from the vacuum. Typically...

cordless vacuums, scrubbers, hair dryers, robotic lawn mowers, and robot vacuum cleaners and mops. The company specializes in the production of vacuum cleaners...

The intermittent vacuum therapy (IVT) is a treatment conducted in case of venous and arterial issues as well as in rehabilitation (after sports injuries...

horror vacui (Latin: horror of the vacuum) or plenism (/ˈpliːnɪzəm/)—commonly stated as "nature abhors a vacuum", for example by Spinoza—is a hypothesis...

14, 1965) was an American entrepreneur and businessman, specializing in vacuum tubes and radio manufacturing. He is best known for being the most successful...

A Rotary Vacuum Filter Drum consists of a cylindrical filter membrane that is partly sub-merged in a slurry to be filtered. The inside of the drum is held...

carpets. Common methods include hot water extraction, dry-cleaning, and vacuuming. Hot water extraction, sometimes mistakenly called "steam cleaning", uses...

breakers. Today, oil-filled equipment has largely been replaced by air-blast, vacuum, or SF6 equipment, allowing large currents and power levels to be safely...

in "inches of mercury vacuum" (inHg), down to a 30 inHg vacuum. Inches of mercury is also used in automotive cooling system vacuum test and fill tools....

The Keidel vacuum tube was a type of blood collecting device, first manufactured by Hynson, Wescott and Dunning in around 1922. This vacuum was one of...

Messier 109 (also known as NGC 3992 or the Vacuum Cleaner Galaxy) is a barred spiral galaxy exhibiting a weak inner ring structure around the central bar...

have the solution, but it works only in the case of spherical cows in a vacuum." John Harte, who received his Ph.D. from the University of Wisconsin in...

Vacuum-tube computers, now called first-generation computers, are programmable digital computers using vacuum-tube logic circuitry. They were preceded...

action of these generators, and can thus be excited out of the asymmetric vacuum by these generators. Thus, they can be thought of as the excitations of...

such as pulse engines or jet engines, so rocket engines can be used in a vacuum, and they can achieve great speed, beyond escape velocity if enough delta...

Nature Bears a Vacuum is a 7" EP released by indie rock band The Shins. The EP was released on the Omnibus Records label in 1998. According to one reviewer...

of a material expressed as a ratio with the electric permittivity of a vacuum. A dielectric is an insulating material, and the dielectric constant of...

separation process with a vacuum. For oxygen and nitrogen VSA systems, the vacuum is typically generated by a blower. Hybrid vacuum pressure swing adsorption...

the electric vacuum cleaner industry during most of the 20th century, to the point where the Hoover brand name became synonymous with vacuum cleaners and...

(formally the American Vacuum Society, Inc.) is a professional and scientific society founded in 1953 as a committee on vacuum technology. The AVS supports...

of refraction), often denoted n, is the ratio of the speed of light in vacuum (c) to the speed of light in a given optical medium (v), n=c/v. The refractive...

symmetries, but the lowest-energy vacuum solutions do not exhibit that same symmetry. When the system goes to one of those vacuum solutions, the symmetry is...

dependent and invented by Alexander Zarchin, freezes seawater in a vacuum. Under vacuum conditions the ice, desalinated, is melted and diverted for collection...

In the early days of electronics, devices that used vacuum tubes (called valves in British contexts), such as radios, were powered by batteries. Each battery...

manufactures vacuum cleaners, including uprights, cordless, canisters, sticks and handhelds. Eureka also manufactures aftermarket vacuum accessories,...

the company traces its roots as far back as 1866 to the founding of the Vacuum Oil Company, which would become part of ExxonMobil through its own merger...

with a vacuum atmosphere using a carbon filament. In 1840, British scientist Warren De la Rue enclosed a coiled platinum filament in a vacuum tube and...

Red Bacteria Vacuum (レッドバクテリアバキューム) is an all-girl Japanese punk band from Osaka formed in 1998 consisting of Ikumi (guitar/vocals), Kassan (bass/vocals...

of other vacuum-tube oscillators. Vacuum-tube feedback oscillators became the basis of radio transmission by 1920. However, the triode vacuum tube oscillator...

A vacuum insulated evaporator (VIE) is a form of pressure vessel that allows the bulk storage of cryogenic liquids including oxygen, nitrogen and argon...

necrosis of left femoral head. Man of 45 years with AIDS. The intravertebral vacuum cleft sign (at white arrow) is a sign of avascular necrosis. Avascular necrosis...

production of vacuum cleaners under license from the American Keller Manufacturing Company of Philadelphia (producer of the Santo vacuum cleaners), on...

space is lethal without appropriate protection: the greatest threat in the vacuum of space derives from the lack of oxygen and pressure, although temperature...

Vacuum in the Dark is the second novel written by Jen Beagin, published in 2019 by Simon & Schuster. It is the sequel to Pretend I'm Dead. Literary Hub...

Wunderlich refers to a series of vacuum tubes introduced in the early 1930s. Wunderlichs were designed to be used as full-wave detectors in AM radio receivers...

engine, Mach-effect or MEGA drives, quantum drive claims, and the quantum vacuum thruster. No reactionless drive has become an accepted propulsion technology...

target in straight lines and impact energetically on the substrates or vacuum chamber (causing resputtering). Alternatively, at higher gas pressures,...

based on the development of components and systems for the generation of vacuum and gas management engineering. In 1850, the merchant Martin Kothe founded...

theorem, the Schwarzschild metric is the most general spherically symmetric vacuum solution of the Einstein field equations. A Schwarzschild black hole or...

were sealed with grease and the air was pumped out, the sphere contained a vacuum and could not be pulled apart by teams of horses. Once the valve was opened...

energy would not prevent a star being created by a quantum transition of the vacuum. George Gamow recounted putting this idea to Albert Einstein: "Einstein...

and/or fissures or cracks in the bedrock. A vacuum toilet is a flush toilet that is connected to a vacuum sewer system, and removes waste by suction....

The Journal of Vacuum Science and Technology is a peer-reviewed scientific journal published in two parts, A and B, by the American Institute of Physics...

This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes. Before the advent of semiconductor devices...

subjected to an internal vacuum (i.e., low pressure) that is lower than the equipment can withstand. In such cases, vacuum relief valves are used to...

structure surrounding the vacuum vessel and the superconducting magnets, with the purpose of providing a super-cool vacuum environment. Its thickness...

Demand vacuum in economics and marketing is the effect created by consumer demand on the supply chain. The term refers to an analogy whereby consumer demand...

containers/carriers through networks of tubes by compressed air or by partial vacuum. They are used for transporting solid objects, as opposed to conventional...

Rogers Vacuum Tube Company (formally named Radio Manufacturing Corporation Limited) was founded as the Standard Radio Manufacturing Corporation in 1925...

heated in a vacuum or in an inert atmosphere to avoid chemical side reactions (such as combustion or hydrolysis). Pyrolysis in a vacuum also lowers the...

however, much later it was revived to express the energy density of space, or vacuum energy, that arises in quantum mechanics. It is closely associated with...

arsenide and germanium are also used. The obsolete thermionic diode is a vacuum tube with two electrodes, a heated cathode and a plate, in which electrons...

induction and magnetizing force when forming a magnetic field in a classical vacuum. A closely related property of materials is magnetic susceptibility, which...

delivery. Engine vacuum is the difference between the pressures in the intake manifold and ambient atmospheric pressure. Engine vacuum is a "gauge" pressure...

phases: Expanding vacuum state with high potential energy Phase transition to true vacuum Slow roll and reheating A "vacuum" or "vacuum state" in quantum...

Vacuum fusion is an analytical chemistry technique, used for determining the oxygen, hydrogen, and sometimes nitrogen content of metals. While ineffective...

chromodynamics (QCD), the gluon condensate is a non-perturbative property of the QCD vacuum which could be partly responsible for giving masses to light mesons. If...

presentation on radiography is a radiolucent cleft often called a vacuum phenomenon, or vacuum sign. Pneumarthrosis is associated with osteoarthritis and spondylosis...

A thermal cooker, or a vacuum flask cooker, is a cooking device that uses thermal insulation to retain heat and cook food without the continuous use of...

process, a vacuum of 50–100 microbar is applied, by the vacuum system, to remove the solvent.[citation needed] A two-stage rotary vacuum pump is used...

works only as part of a vacuum insulation system. For use in cryogenics, wrapped MLI can be installed inside the annulus of vacuum jacketed pipes. MLI may...

the Lodge. His obituary credited him with being the inventor of the gas vacuum engine and the screw propeller. In patents dated 4 December 1823 and 22...

pipette types work by creating a partial vacuum above the liquid-holding chamber and selectively releasing this vacuum to draw up and dispense liquid. Measurement...

gases, compressed air, irrigation, plastic pressure pipe systems, and vacuum system applications. There are three basic types of plastic pipe: Extruded...

English engineer, best known for having invented one of the first powered vacuum cleaners. He also designed Ferris wheels, suspension bridges and factories...

This protocol works by having the sender inject energy into the quantum vacuum state which the receiver can then extract positive energy from. QET differs...

Swedish multinational industrial company. It manufactures compressors, vacuum equipment, pumps, generators, assembly tools, quality assurance equipment...

were primarily used on railways where vacuum brakes were used to brake the train, but where there was no vacuum brake on the steam locomotive itself,...

excavator, or vacuum excavator, is a construction vehicle that removes heavy debris or other materials from a hole on land using vacuuming. Suction excavators...

the mid-1920s, amplifying vacuum tubes revolutionized radio receivers and transmitters. John Ambrose Fleming developed a vacuum tube diode. Lee de Forest...

from about 200 to 600 or higher; heavy gas oil also is known as "heavy vacuum gas oil" (HVGO). In the fluid catalytic cracking process, the HGO feedstock...

Porosity sealing is done through the process of vacuum impregnation. Vacuum impregnation is a preferred OEM process that seals porosity and leak paths...

Gas chromatography–vacuum ultraviolet spectroscopy (GC-VUV) is a universal detection technique for gas chromatography. VUV detection provides both qualitative...

FOTON-M3 mission in low Earth orbit, where they were exposed to space's vacuum for 10 days, and reanimated, just by rehydration, back on Earth. In 2011...

experimental methods and repeatable demonstrations on the physics of the vacuum, atmospheric pressure, electrostatic repulsion, his advocacy for the reality...

sublimation pump (TSP) is a type of vacuum pump used to remove residual gas in ultra-high vacuum systems, maintaining the vacuum. Its construction and principle...

scroll compressor (also called spiral compressor, scroll pump and scroll vacuum pump) is a device for compressing air or refrigerant. It is used in air...

named because they are emitted by the negative electrode, or cathode, in a vacuum tube. To release electrons into the tube, they first must be detached from...

Ivanka Vacuuming was a piece of livestreamed performance art by American artist Jennifer Rubell which showed an Ivanka Trump look-alike vacuuming crumbs...

chances of a spin. The vacuum booster or vacuum servo is used in most modern hydraulic brake systems which contain four wheels, the vacuum booster is attached...

can be described as a perturbation theory of the electromagnetic quantum vacuum. Richard Feynman called it "the jewel of physics" for its extremely accurate...

propagation of matter or information faster than the speed of light in vacuum (c). The special theory of relativity implies that only particles with zero...

purpose of his experiment is to prove that the source of "horror of the vacuum" by nature comes from atmospheric pressure. For much of human history, the...

easily. Today, modern street sweepers are mounted on truck bodies and can vacuum debris that accumulates in streets. The need for rubbish to be removed from...

broadcasting was not established until the 1920s, following the development of vacuum tube receivers and transmitters. AM radio remained the dominant method of...

or an aspirator. An ejector operates on similar principles to create a vacuum feed connection for braking systems etc. The motive fluid may be a liquid...

remotely starting industrial vacuum cleaners from power tools. Several power tools, cordless battery packs, and industrial vacuum cleaners ship with wireless...

Vacuum blasting is an abrasive blasting method, also referred to as dustless blasting or closed loop abrasive blasting. The method is characterized by...

to propose that our universe originated as a quantum fluctuation of the vacuum. Tryon was born and raised in Terre Haute, Indiana. He took his first physics...

A vactrain (short for vacuum tube train) is a type of high-speed transport system where vehicles travel through partially evacuated tubes or tunnels. By...

A Perfect Vacuum (Polish: Doskonała próżnia) is a 1971 book by Polish author Stanisław Lem, the largest and best known collection of Stanisław Lem's fictitious...

deposit of reactive material that is placed inside a vacuum system to complete and maintain the vacuum. When gas molecules strike the getter material, they...

X-rays, to gamma rays. All forms of EMR travel at the speed of light in a vacuum and exhibit wave–particle duality, behaving both as waves and as discrete...

can occur within solids, liquids, or gases (and theoretically even in a vacuum). However, the specific breakdown mechanisms are different for each kind...

acceleration). This is known as the principle of relativity. The speed of light in vacuum is the same for all observers, regardless of the motion of light source...

Electric, is an obsolete vacuum tube electronic oscillator circuit which uses a negative resistance characteristic in early tetrode vacuum tubes, caused by a...

efficiency. This technique is often referred to as vacuum degasification. Specialized vacuum chambers, called vacuum degassers, are used to degas materials through...

depressurized to near atmospheric pressure. Vacuum pumps: A vacuum pump sucks air or air/steam mixtures from the chamber. Vacuum pumps have been shown to improve...

The Taub–NUT metric (/tɔːb nʌt/, /- ˌɛn.juːˈtiː/) is an exact solution to Einstein's equations. It may be considered a first attempt in finding the metric...

stations utilize a water spray equipped vacuum building. All individual CANDU units on site are connected to this vacuum building by a large pressure relief...

slightly rotate, thereby advancing the ignition timing. Vacuum advance typically uses manifold vacuum to adjust the ignition timing, for example to improve...

which unbonded sand is held in the flask with a vacuum. The pattern is specially vented so that a vacuum can be pulled through it. A heat-softened thin...

electron in the vacuum as a reference point for energies. This approach is not advisable unless one is careful to define exactly where the vacuum is. The problem...

then over. However, it has been demonstrated that siphons can operate in a vacuum and to heights exceeding the barometric height of the liquid. Consequently...

In vacuum tube technology, HT or high tension describes the main power supply to the circuit, which produces the current between anode and cathode. It...

electrical circuit. A plasma contactor changes the electrically insulating vacuum into a conductor by providing movable electrons and positive gas ions. This...

Tung-Sol was an American manufacturer of electronics, mainly lamps and vacuum tubes. In 1904, the company started as a small business in New York City...

solved the problem in 1935 by vacuumizing the system, which allowed a reduction in friction generated at high speeds. Vacuum systems also enabled the maintenance...

The penis pump is a vacuum pump that is used as an aid in cases of impotence, that is, when sufficient rigidity of the organ for engaging in sexual intercourse...

pressures are necessary. To achieve these low pressures, a vacuum chamber is needed. The vacuum chamber typically includes windows so that the atoms can...

direction of current. Physically, rectifiers take a number of forms, including vacuum tube diodes, wet chemical cells, mercury-arc valves, stacks of copper and...

A vacuum dry box is a piece of safety equipment which can provide an inert, or controlled atmosphere for handling sensitive materials. These devices can...

be divided into "air-to-vacuum" engines, which start their work at sea level and finish it at vacuum conditions, and "vacuum" engines, which perform all...

freeze dried. Fresh fruit is frozen and placed in a drying chamber under a vacuum. Heat is applied, and water evaporates from the fruit while it is still...

automatic vacuum brake. This system was similar to the simple vacuum system, except that the creation of vacuum in the train pipe exhausted vacuum reservoirs...

the world's largest thermal vacuum chamber. It was originally commissioned for nuclear-electric power studies under vacuum conditions, but was later decommissioned...

successful portable electric vacuum cleaner that revolutionized household carpet cleaning. His device was not the first vacuum cleaner, but it was the first...

The van Musschenbroek vacuum pump is an instrument from the late 17th century constructed by the Dutch craftsman Johannes Joosten van Musschenbroek [nl]...

watt is a unit of measurement that represents the true suction power of vacuum cleaners. It is calculated by multiplying the airflow (in cubic metres per...

floor-standing drives that used vacuum columns to buffer long U-shaped loops of tape. Between active control of powerful reel motors and vacuum control of these U-shaped...

anode and cathode is different for electrical devices such as diodes and vacuum tubes where the electrode naming is fixed and does not depend on the actual...

A triode is an electronic amplifying vacuum tube (or thermionic valve in British English) consisting of three electrodes inside an evacuated glass envelope:...

A Roomba is an autonomous robotic vacuum cleaner made by the company iRobot, and was first introduced in September 2002. Roombas have a set of sensors...

{D}}(\alpha )|0\rangle } where | 0 ⟩ {\displaystyle |0\rangle } is the vacuum state, D ( α ) {\displaystyle D(\alpha )} is the displacement operator and...

amplify was the triode vacuum tube, invented in 1906 by Lee De Forest, which led to the first amplifiers around 1912. Vacuum tubes were used in almost...

vacua are usually labeled by the vacuum expectation values of scalar fields, as Lorentz invariance forces the vacuum expectation values of any higher...

business. Petron's history dates back to September 7, 1933, when Socony-Vacuum Oil Company (Standard Oil of New York) and Standard Oil of New Jersey (also...

The Sprengel pump is a vacuum pump that uses drops of mercury falling through a small-bore capillary tube to trap air from the system to be evacuated....

transistors replaced vacuum tubes in computer designs, giving rise to the "second generation" of computers. Compared to vacuum tubes, transistors have...

maximum thrust of 7,530 kN (1,690,000 lbf) and the upper stage's single vacuum optimized Archimedes at 1,110 kN (250,000 lbf). It was expected to have...

manufacturer of mechanical musical instruments before it became a major vacuum maker. In 1889, Gustave Brachhausen, the foreman of the Symphonion music...

extremes of temperature, desiccation, impact, radiation, and exposure to the vacuum of space. In 1834, C.A.S. Schulze, giving the first formal description of...

ground-glass rim of the desiccator lid must be greased with a thin layer of vacuum grease, petroleum jelly or other lubricant to ensure an airtight seal. In...

devices. Compared with the vacuum tube, transistors are generally smaller and require less power to operate. Certain vacuum tubes have advantages over...

but an operating theater is generally equipped with a central system of vacuum tubes. Most aspirators are therefore portable, for use in ambulances and...

to produce vacuum tubes. As time passed, production and elemental techniques of the vacuum tube transformed into the manufacturing of vacuum fluorescent...

The two main kinds of filtration used in laboratories are gravity and vacuum/suction. Gravity filtration is often used in chemical laboratories to filter...

other components free-flowing. Vacuum swing adsorption (VSA) uses the same principle as PSA but swings between vacuum pressures and atmospheric pressure...

Radiola III regenerative broadcast receiver. By using a pair of low-power vacuum tubes in push–pull configuration, the amplifier allowed the use of a loudspeaker...

include: Oxygen Medical air Nitrous oxide Nitrogen Carbon dioxide Medical vacuum Waste anaesthetic gas disposal (WAGD; US usage) or anaesthetic gas scavenging...

time-varying signals. Many electronic devices, such as diodes, transistors and vacuum tubes, whose function is processing time-varying (AC) signals, also require...

of classical approximation to a nonzero vacuum energy. These are discussed here as distinct from the vacuum solutions in which the cosmological constant...

rocket using a cluster of nine identical engines on the first stage, and one vacuum-optimized version with a longer nozzle on the second stage. This arrangement...

leisure hours or during the weekend, people may feel a sense of "existential vacuum" and emptiness. In political philosophy, emptiness is associated with nihilism...

any vacuum pump (typically mechanical) used to initially evacuate a vacuum system, as a first stage towards achieving high vacuum or ultra high vacuum. The...

The Dirac sea is a theoretical model of the electron vacuum as an infinite sea of electrons with negative energy. It was first postulated by the British...

Thrust is a reaction force described quantitatively by Newton's third law. When a system expels or accelerates mass in one direction, the accelerated mass...

12AX7 (also known as ECC83) is a miniature dual-triode vacuum tube with high voltage gain. Developed around 1946 by RCA engineers in Camden, New Jersey...

contains ultra-low levels of particle densities, constituting a near-perfect vacuum of predominantly hydrogen and helium plasma, permeated by electromagnetic...

A cathode ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams, which are directed and controlled to display...

technology. When high tech gets old, it can become low tech–for example, vacuum tube electronics. Further, high tech is also in contrast to the concept...

and dirt. Vacuum-packed banknotes also take up less space in containers used for transportation. Currency units are vacuum packed using a vacuum sealer....

turbomolecular pump is a type of vacuum pump, superficially similar to a turbopump, used to obtain and maintain high vacuum. These pumps work on the principle...

equalization devices, preamplifiers and amplifiers (both solid-state and vacuum tube), loudspeakers (including horn, electrostatic and magnetostatic speakers)...

Penetron (a 2 colour see-through CRT) A vacuum tube is based on current conduction through a vacuum (see Vacuum tube). Diode or rectifier tube Amplification...

were prone to explosion unless carefully operated. Vacuum safety valves (or combined pressure/vacuum safety valves) are used to prevent a tank from collapsing...

hydrocarbons into products having higher quality performance. Atmospheric and vacuum distillation of crude oils are the main primary separation processes producing...

experiments about lifting weight using vacuum. Otto von Guericke researched vacuum practically, but used pumps to create the vacuum. Robert Hooke did hide a phrase...

permittivity εr which is the ratio of the absolute permittivity ε and the vacuum permittivity ε0 κ = ε r = ε ε 0   . {\displaystyle \kappa =\varepsilon _{\mathrm...

trigger allergy and asthma symptoms. For a HEPA filter in a vacuum cleaner to be effective, the vacuum cleaner must be designed so that all the air drawn into...

better than 1 nanometer. Specimens are observed in high vacuum in a conventional SEM, or in low vacuum or wet conditions in a variable pressure or environmental...

current to flow between the cathode and anode electrodes. The vacuum version is called a vacuum krytron, or sprytron. The krytron was one of the earliest...

Compactrons are a type of vacuum tube, which contain multiple electrode structures packed into a single enclosure. They were designed to compete with early...

Entropic force Entropic gravity List of quantum gravity researchers Superfluid vacuum theory Einstein–Cartan theory H. Kleinert (1987). "Gravity as Theory of...

Enhancement mode, P‑channel MOSFET Vacuum tube diode Vacuum tube triode Vacuum tube tetrode (pin letters not part of symbol) Vacuum tube pentode For multiple pole...

in the history of Vacuum Cleaner development by the Best Cordless Vacuum Guide. In 2014 Vax diversified its product range from vacuums, carpet washers and...

Neyco is a French company founded in 1954, specialist in High Vacuum, UHV, Inorganic materials and thin films. Initially created to allow access to International...

medium-voltage AC motor controllers use vacuum contactors. High voltage AC contactors (greater than 1,000 volts) may use vacuum or an inert gas around the contacts...

with an electron beam given off by a charged tungsten filament under high vacuum. The electron beam causes atoms from the target to transform into the gaseous...

gas-phase reactions and improve film uniformity across the wafer. Ultrahigh vacuum CVD (UHVCVD) – CVD at very low pressure, typically below 10−6 Pa (≈ 10−8...

that in quantum field theory the virtual anti-electron contribution to the vacuum polarization would break the equivalence of inertial and gravitational mass...

an observer who is uniformly accelerating through empty space (Minkowski vacuum) will perceive a thermal bath. This means that even in the absence of any...

The 845 power triode is a radio transmitting vacuum tube which can also be used as an audio amplifier and modulation tube. Typically, the plate is machined...

used in childbirth. Their use can serve as an alternative to the ventouse (vacuum extraction) method. Forceps births, like all assisted births, should be...

An X-ray tube is a vacuum tube that converts electrical input power into X-rays. The availability of this controllable source of X-rays created the field...

shielding electrodes in vacuum circuit-breakers (PDF). 20th International Symposium on Discharges and Electrical Insulation in Vacuum. Archived from the original...

used in some early vacuum tube radios because they were more sensitive than the vacuum tube grid-leak detector. During the vacuum tube era, the term "detector"...

of light in vacuum. For optical signals, the velocity factor is the reciprocal of the refractive index. The speed of radio waves in vacuum, for example...

both for measuring the fluid flow and for moving other fluids (e.g. in a vacuum ejector). In inviscid fluid dynamics, an incompressible fluid's velocity...

similar metal would strongly adhere if brought into contact while in a vacuum . Micro and nano-scale cold welding has shown potential in nanofabrication...

UK using the Very Large Telescope reported observational indications of vacuum birefringence from RX J1856.5−3754. A degree of polarization of about 16%...

manifold. This provides full engine vacuum (and hence, full vacuum advance) at idle. Some vacuum advance units have two vacuum connections, one at each side...

non-ferrous metals Zirconium Magnesium Carbon Tungsten Vacuum deoxidation is a method which involves using a vacuum to remove impurities. A portion of the carbon...

contains an extra term responsible for the electric polarization of the vacuum. This potential was found by Edwin Albrecht Uehling in 1935. Uehling's corrections...

Galileo proposed that a vacuum held the water up and that it could not hold any more. At the time the existence of vacuums was controversial. Galileo's...

principle, which allows the virtual particles to spontaneously emerge from vacuum at short time and space ranges. The concept of virtual particles arises...

hot-filament gauge or hot-cathode gauge, is the most widely used low-pressure (vacuum) measuring device for the region from 10−3 to 10−10 Torr. It is a triode...

Stark's Vacuum Museum, also known as Stark's Vacuum Cleaner Museum, is a vacuum cleaner museum in Portland, Oregon. It showcases more than 100 vacuums from...

conveyed by vacuum sewer. Pipelines range in size from pipes of 125 millimetres (4.9 in) in diameter up to 280 millimetres (11 in) in diameter. Vacuum sewer...

reflow can be augmented by the addition of a late-stage vacuum chamber.  Introducing a vacuum chamber to the reflow process allows voids and bubbles to...

under vacuum. A vacuum bell jar is placed on a base which is vented to a hose fitting, that can be connected via a hose to a vacuum pump. A vacuum is formed...

railways were divided–some using vacuum brakes and some using air brakes–but there was a gradual standardization on the vacuum brake. Some locomotives, e.g...

Goldberg–Sachs theorem is a result in Einstein's theory of general relativity about vacuum solutions of the Einstein field equations relating the existence of a certain...

household, as the core technology in bagless types of portable vacuum cleaners and central vacuum cleaners. Cyclones are also used in industrial and professional...

placed along its periphery. The stream of air is provided by a vacuum system, driven by a vacuum pump, or a venturi. Air passing through the narrowest portion...

Iwata Kabushiki-gaisha) is a Japanese manufacturer of air compressors, vacuum pumps, spray guns, and coating systems used in industrial, automotive, and...

The Black & Decker DustBuster (now stylized as dustbuster) is a cordless vacuum cleaner that was introduced in January 1979. Mark Proett and Carroll Gantz...

fluid left on an infant's head after they have been delivered by vacuum extraction. A vacuum extraction is a type of assistance used during vaginal delivery...

from a solid surface into a vacuum. However, field emission can take place from solid or liquid surfaces, into a vacuum, a fluid (e.g. air), or any non-conducting...

a system of record forming wherein the mold pressure was replaced by a vacuum. In this technique, the mold cavity was evacuated, and vinyl was introduced...

which uses discrete transistors instead of vacuum tubes. The first generation of electronic computers used vacuum tubes, which generated large amounts of...

2015. The novel was reissued as a hardcover in 2018 by Simon & Schuster. Vacuum in the Dark, a sequel to Pretend I'm Dead, received a starred Kirkus review...

electrodynamic tethers) or cooling. Thermionic vacuum tubes emit electrons from a hot cathode into an enclosed vacuum and may steer those emitted electrons with...

rectifier. Thyratrons can handle much greater currents than similar hard-vacuum tubes. Electron multiplication occurs when the gas becomes ionized, producing...

Rexair LLC is an American manufacturer of vacuum cleaners based in Troy, Michigan. Rexair is predominantly known for its production and marketing of a...

values of gm for a small-signal vacuum tube are 1 to 10 mS. It is one of the three characteristic constants of a vacuum tube, the other two being its gain...

named after William Stanley Jr. who invented the first all-steel insulated vacuum bottle in 1913. Stanley was established in 1915. The Stanley brand has since...

term can describe the result of some food preservation practices, such as vacuum packing and canning. Packaging materials include glass, aluminum cans, metal...

first practical electronic amplifier, the three-element "Audion" triode vacuum tube in 1908. This helped start the Electronic Age, and enabled the development...

travel, and t is the time at which the wave is described. Plane waves in vacuum are the simplest case of wave propagation: no geometric constraint, no interaction...

may also be used to treat overjets. Removable retainers include Hawley, Vacuum-formed, Begg and Barrer. They provide orthodontic retention when worn and...

hard brush after it had dried. Vacuum metallizing involves heating the coating metal to its boiling point in a vacuum chamber, then letting condensation...

licensing agreements. Key technologies—including wireless transmission systems, vacuum tubes, and receiver circuits—were protected by patents held by individual...

curvature. Evacuated tube solar cookers are essentially vacuum sealed between two layers of glass. The vacuum allows the tube to act both as a "super" greenhouse...

repeatedly return to the same house. Outside, they find a box containing vacuum-sealed, flavorless food. Tom sets the house on fire and the couple sleeps...

Vacuuming Completely Nude in Paradise is a 2001 comedy-drama film produced by the BBC in association with Destiny Films. It was directed by Danny Boyle...

The Electrolux Trilobite is a robotic vacuum cleaner manufactured by the Swedish corporation Electrolux. First demonstrated as a prototype in 1996, the...

Dongqi founded Ecovacs Robotics as an original equipment manufacturer for vacuum cleaners under the name TEK Electrical Company. The company rebranded in...

magnetic field that it produces. Similarly, the measured speed of light in vacuum remains unchanged, whatever the location in time and space, and whatever...

hydrogen. Theoretically, an aerostatic vehicle could be made to use a vacuum or partial vacuum. As early as 1670, over a century before the first manned hot-air...

substance. Outgassing is a challenge to creating and maintaining clean high-vacuum environments. NASA and ESA maintain lists of materials with low-outgassing...

typically designed for process control and contamination monitoring in vacuum systems. When constructed as a quadrupole mass analyzer, there exist two...

inserts are made by vacuum forming an acrylic or PVC (poly vinyl chloride) sheet which is heated then formed in a mold by applying vacuum. Having the proper...

It became IBM's standard tape drive for their early vacuum-tube era computer systems. Later vacuum-tube machines and first-generation transistor computers...

specializing in vacuum equipment and related products, headquartered in Chigasaki, Kanagawa, Japan. In 1952, the company was established as Japan Vacuum Engineering...

sandwiches or on their own. They can be purchased canned, pre-sliced (usually in vacuum packs), or they can be sliced to order, most often in delicatessens and...

A fire hose vacuum is a small pneumatic device that removes residual air from the inside of a fire hose, thus making it smaller and somewhat rigid. This...

used as it gives far superior insulation, and sometimes other gases or a vacuum are employed. Possibly the earliest use of double glazing was in Siberia...

based on real vacuum tube circuits and non-linearities, mathematically simulating the large-signal transfer functions of various vacuum tubes and output...

for its robotic sweeping and mopping devices and handheld cordless stick vacuums. Xiaomi played a key role in the company's founding. Beijing Roborock Technology...

electrons is transformed into heat upon impact. EBW is often performed under vacuum conditions to prevent dissipation of the electron beam. Electron-beam welding...

name of vacuum cleaners made by Stein & Co GmbH, a company based in the German town of Velbert. They produce a range of upright and cylinder vacuum cleaners...

High Vacuum is a science fiction novel by Charles Eric Maine. It was first published in 1957 by Hodder & Stoughton. The first crewed Moon ship, Alpha,...

gel is always used to help the pump maintain a vacuum, in the same way vacuum grease is used with a vacuum pump in scientific applications. The gel also...

The Vacuum Tower Telescope (VTT) is an evacuated-optics solar telescope located at the Teide Observatory on Tenerife in the Canary Islands. It is operated...

Chicago, Illinois, filed her patent for the first vacuum coffee maker that truly automated the vacuum brewing process, while eliminating the need for a...

the vacuum homogeneously across the external surfaces and to avoid any folds of the vacuum bag being transferred to the laminate surface; the vacuum bag...

his postulation of the magnetic-field-induced superconductivity of the vacuum. Chernodub attended Lycée 145 in Kyiv from 1980 to 1990. He earned a bachelor's...

centrifugal force acting as a seal. Liquid-ring pumps are typically used as vacuum pumps, but can also be used as gas compressors. The function of a liquid-ring...

"Telefunken AG"). During the Second World War, Telefunken was a supplier of vacuum tubes, transmitters and radio relay systems, and developed Funkmess facilities...

The Fetron was a range of solid-state, plug-compatible replacements for vacuum tubes (valves). Fetrons were manufactured by Teledyne Semiconductor from...

hydraulic connections from a pump or engine system, compressed air, and engine vacuum; or the engine may be directly tapped through a mechanical connection. Modern...

stop a motor vehicle. It uses a combination of mechanical components and vacuum assistance to multiply the pressure applied to the brake pedal by the driver...

Wertheim is a brand of domestic vacuum cleaners and floor care products. The Wertheim brand name used to be sold in Australia and New Zealand through Godfreys...

The RCA BIZMAC was a vacuum-tube computer manufactured by RCA from 1956 to 1962. Although RCA was noted for their pioneering work in transistors, the company...

feet (69 m) below ground. Enclosed within the concrete tower is a vertical vacuum tube with 3-foot-thick walls. The optical path starts at a heliostat on...

Dewar Dewar (caste), a fishing caste from India Vacuum flask (also known as a Dewar flask), a vacuum-insulated container used to maintain internal temperature...

almost 40 years. The company was initially called Vacuum Chronometer Corp., which manufactured vacuum watches (sold under several well-known trademarks)...

designed to test certain characteristics of vacuum tubes (thermionic valves). Tube testers evolved along with the vacuum tube to satisfy the demands of the time...

products, including: Cordless Vacuum Cleaner NEX Cordless Vacuum Cleaner F8 Cordless Vacuum Cleaner F8 Lite LiteMattress Vacuum Cleaner History of Xiaomi...

PVLAS (Polarizzazione del Vuoto con LASer, "polarization of the vacuum with laser") aims to carry out a test of quantum electrodynamics and possibly detect...

or onto a mold and cooled to a finished shape. Its simplified version is vacuum forming. In its simplest form, a small tabletop or lab size machine can...

particles are massless. At a critical temperature, the Higgs field develops a vacuum expectation value; some theories suggest the symmetry is spontaneously broken...

A Büchner flask, also known as a vacuum flask, filter flask, suction flask, side-arm flask, or Bunsen flask, is a thick-walled Erlenmeyer flask with a...

suggested that the quantum vacuum could be viewed as a "relativistic ether". Paul Davies writes that while the quantum vacuum resembles in some ways the...

electronics. Electrons can exist as free particles. As particle beams in a vacuum, free electrons can be accelerated, focused, and used for applications such...

a Fellow of the American Physical Society and a Fellow of the American Vacuum Society. He has patented multiple inventions. Freeouf was born in Lincoln...

Crookes–Hittorf tube) is an early experimental discharge tube with partial vacuum invented by English physicist William Crookes and others around 1869–1875...

system of a two-level atom interacting with a quantized field mode (i.e. the vacuum) within an optical cavity. This model predicted that the rate of spontaneous...

by working them at a partial vacuum, supplied by the main engine condensers. On modern diesel-powered ships, this vacuum can instead be produced by an...

The 807 is a beam tetrode vacuum tube, widely used in audio- and radio-frequency power amplifier applications. 807s were used in audio power amplifiers...

sterile glass or plastic test tube with a colored rubber stopper creating a vacuum seal inside of the tube, facilitating the drawing of a predetermined volume...

created neutron star (if one was created), creating a supernova. A high vacuum exists within all cathode-ray tubes. If the outer glass envelope is damaged...

back end of the needle. The vacuum in the tube then automatically draws the needed blood directly from the vein. Multiple vacuum tubes can be attached to...

bottom of the pump and out the exhaust. They were the first type of high vacuum pumps operating in the regime of free molecular flow, where the movement...

the years, from hydraulic, pneumatic, and electromechanical clutches to vacuum-operated, electromagnetic, and even centrifugal clutches. Fluid couplings...

fire engine uses a vacuum to draw water from a portable water tank, pool, or other static water source. It is built to withstand vacuum, rather than pressure...

was the first site to use an automated vacuum collection system, with the first system installed in 1961. "Vacuum system history". Envacgroup. Archived...

tube, a vacuum tube converting incident photons into an electric signal. Photomultiplier tubes (PMTs for short) are members of the class of vacuum tubes...

business of Eames Vacuum Brake Company. Eames Vacuum Brake Company had previously been in existence since 1876 manufacturing vacuum brakes. The new company...

room.[citation needed] A bug vacuum (bug vac, aspirator, or suck-a-bug) is a type of small but powerful portable vacuum cleaner, usually with internal...

may also be accomplished by decantation and centrifugation followed by vacuum drying, or it may be obtained directly from cream by breaking the emulsion...

SF6, or natural-origin gases) or in another insulating medium (oil or vacuum). Immediately after contact separation, the current continues to flow in...

and similar specialty metal industries. Vacuum arc remelting (VAR) is a secondary remelting process for vacuum refining and manufacturing of ingots with...

several redundant streams. The lower part of a pellet stream has to be in a vacuum tube to avoid excessive drag in the atmosphere. Similar to the top station...

science, some of the most widely recognized being the speed of light in vacuum c, the gravitational constant G, the Planck constant h, the electric constant...

air horn or pipe organ; a bellows used to encourage a fire; a vacuum cleaner and a vacuum pump. All air pumps contain a part that moves (vane, piston,...

system is a pressurized liquid, the MS analyzers commonly operate under high vacuum. Thus, it is not possible to directly pump the eluate from the LC column...

and engine RPM. The vacuum switching valve (VSV) which controls the vacuum supply to the actuator is normally closed and passes vacuum to the actuator when...

city's renewal projects and purchases a vacuum cleaner to tidy his apartment. At night he overhears his new vacuum coughing, and in the morning finds that...

filtration techniques. To obtain solid products a vacuum filtration apparatus can be used. Vacuum filtration uses suction to pull liquid through a Büchner...

they are O-plasma vacuum cleaned (and/or vacuum baked) to reach out-gassing performance similar to Teflon while reaching vacuum leak tightness (permeability...

The Flowbee is an electrically powered vacuum cleaner attachment made for cutting hair. It was developed and filed for patent in 1986 by Rick E. Hunts...

electron-beam furnace (EB furnace) is a type of vacuum furnace employing high-energy electron beam in vacuum as the means for delivery of heat to the material...

sometimes called physical vapor transport (PVT), describes a variety of vacuum deposition methods which can be used to produce thin films and coatings...

boiling process, vacuum sealing jars or cans of apple butter can remove remaining oxygen in the jar, forming a tight seal. The vacuuming process can be...

or mechanically emptied, and then transported to treatment plants with a vacuum truck, a tank and pump mounted on a flatbed truck, a small tank pulled by...

pair that eventually disappears into the vacuum, or for detecting a virtual pair emerging from the vacuum. In Feynman's language, such creation and annihilation...

premise. Quantum vacuum phenomena are often expounded to be uncaused in origin, referring to quantum indeterminacy governing the vacuum state and semantics...

Gaede (25 May 1878 – 24 June 1945) was a German physicist and pioneer of vacuum engineering. Gaede was born in Lehe, Bremerhaven, the son of Prussian Colonel...

elimination of voids by placing the layup within a closed mold and applying vacuum, pressure, and heat by means other than an autoclave. A resin transfer molding...

a maximum electric field or magnetic field before nonlinearity for the vacuum of E c = m e 2 c 3 q e ℏ ≃ 1.32 × 10 18 V / m {\displaystyle E_{\text{c}}={\frac...

Bretonstone, also known as vibro-compression under vacuum, is a formerly-patented technology invented in the early-1970s[citation needed] by Breton S.p...

Folberth Auto Specialty Co. The new vacuum-powered system quickly became standard equipment on automobiles, and the vacuum principle was in use until about...

amplifying device. However, the same attributes are found with MOSFETs or vacuum tubes. In a class-A amplifier, 100% of the input signal is used (conduction...

contributions to the study of fluids, and clarified the concepts of pressure and vacuum by generalising the work of Evangelista Torricelli. The SI unit for pressure...

just 25 Ω/V, a non-linear scale and no zero adjustment on both ranges. Vacuum tube voltmeters or valve voltmeters (VTVM, VVM) were used for voltage measurements...

dispersion for various needs. Vacuum cleaner nozzles come in several different shapes. Vacuum nozzles are used in vacuum cleaners. Some nozzles are shaped...

a microdistillery in Highgate, London. It distills its spirits under a vacuum in glassware, and thus at a lower temperature than traditional pot stills...

in a vacuum. The three main types of vacuum furnace are: single-wall hot retort, double-walled hot retort, and cold-wall retort. Typical vacuum levels...

pumping systems, to allow for the transfer of the electron beam from the high vacuum in the gun area to the high pressure attainable in its specimen chamber...

directivity constant in the formula, and has nothing to do with propagation in vacuum. Directivity of transmitting antenna - the directivity of transmitting antenna...

consequence of vacuum polarization, was observed in 1975. The related process of the scattering of light by light, also a consequence of vacuum polarization...

appliances company based in Mumbai. It makes water purification devices, vacuum cleaners, air purification systems, and home security products. Eureka Forbes...

The International Union for Vacuum Science, Technique, and Applications (IUVSTA) is a union of 35 science and technology national member societies that...

is also a useful concept in the design and study of vacuum systems. Such systems consist of vacuum chambers and the various flow passages and pumps that...

the toy problem Vacuum World has a discrete finite state space in which there are a limited set of configurations that the vacuum and dirt can be in...

line of automated robotic vacuum cleaners produced by LG. The first version of the Roboking was launched during 2001. The vacuum is also sold under the Hom-Bot...

draws more fuel into the airstream. At the same time, the reduced manifold vacuum results in less fuel flow through the idle and off-idle circuits. During...

a spray of water, which caused the steam to condense, forming a partial vacuum in the cylinder. Atmospheric pressure on the top of the piston pushed it...

gas diffusion process of uranium enrichment plants. It typically uses a vacuum chamber in which a sealed container filled with helium is placed. Helium...

A Kugelrohr (German for "ball tube") is a short-path vacuum distillation apparatus typically used to distill relatively small amounts of compounds with...

but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams. An old name for direct current was galvanic...

reels by storing a short length of tape in the vacuum column under relatively low tension. The vacuum columns are chambers open at one end, the openings...

The locomotive was equipped with a No. 40 combination ejector and two vacuum brake cylinders, each 15 inches (381 millimetres) in diameter. In c. 1896...

called Virgin Killers. (This material was re-released in 1993 on Existential Vacuum Records; They also did a recording session with Bob Mould of Hüsker Dü.)...

matter, and therefore transfers energy through an elastic material medium. Vacuum is, from classical perspective, a non-material medium, where electromagnetic...

light travels in a vacuum. Speed of Light may also refer to: Refractive index, the speed of light in a material relative to in vacuum Speed of light (cellular...

considerably higher frequency and power than were possible with conventional vacuum tubes/thermionic valves. This resulted in production of the "Heil tube"...

the guitar and keyboard. He is part of the songwriting and production duo Vacuum together with Mattias Lindblom. Wollbeck has worked with a number of artists...

The 6V6 is a beam-power tetrode vacuum tube. The first of this family of tubes to be introduced was the 6V6G by Ken-Rad Tube & Lamp Corporation in late...

combustion engine. The system usually consists of a tube, a one-way valve and a vacuum source (such as the inlet manifold). The unwanted gases, called blow-by...

Bissell Inc., also known as Bissell Homecare, is an American privately owned vacuum cleaner and floor care product manufacturing corporation headquartered in...

energy between the lowest energy state, the vacuum, and the next lowest energy state. The energy of the vacuum is zero by definition, and assuming that all...

elements occurring at different points in the timeline. The story anthologies (Vacuum Diagrams, Resplendent, and Xeelee: Endurance) each contain stories taking...

is an event which starts from vacuum, then a Wu–Yang monopole emerges, which then disappears again to leave the vacuum in another Gribov copy. BPST instanton...

from the bottom. The flasks are used to cooperate with vacuum aspirator or vacuum pumps in the vacuum filtration, or as additional security during the distillation...

a vacuum, the vacuum level shows the energy − e ϕ {\displaystyle -e\phi } , where ϕ {\displaystyle \phi } is the electrostatic potential. The vacuum can...

control devices may be needed to protect the environment. Vacuum ovens use pyrolysis in a vacuum. This method is very safe because uncontrolled combustion...

26 Broadway, also known as the Standard Oil Building or Socony–Vacuum Building, is an office building adjacent to Bowling Green in the Financial District...

the characteristic sound associated with a vacuum tube amplifier (valve amplifier in British English), a vacuum tube-based audio amplifier. The concept of...

generations prior to its incorporation, developed steam cleaners and upright vacuums. In 2003, Rosenzweig moved the headquarters from Montreal to Needham, Massachusetts...

refer to clearing the uterus of its contents after a miscarriage, such as vacuum aspiration.[citation needed] thefreedictionary.com > exeresis Citing: The...

added to reduce cathode poisoning and sputtering. Although it resembles a vacuum tube in appearance, its operation does not depend on thermionic emission...

underground infrastructure such as pipes or cables. A vehicle which is purely a vacuum truck has a long wide flexible hose without the big solid nozzle with controls...

here the uncertainty depends on phase and is squeezed for some phases. The vacuum state (d) is a special coherent state and is not squeezed. It has zero mean...