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An active surface is a surface of a radio telescope that is under active computer control of its shape. Large radio telescopes (more than 10 m in diameter
Active_surface
Substance that lowers surface tension
surface tension or interfacial tension between two liquids, a liquid and a gas, or a liquid and a solid. The word surfactant is a blend of "surface-active
Surfactant
Catalyst surface active in redox reactions
the electrochemical surface area (ECSA) is the portion of a catalyst's surface that actively partakes in redox reactions.The surface area of a catalyst
Electrochemical_surface_area
Series of personal computers, tablets and interactive whiteboards by Microsoft
models (Surface RT and Surface 2) ran on ARM32, and a select handful of models starting with the Surface Pro X in 2019 run on ARM64. The Surface line has
Microsoft_Surface
Circular depression in a solid astronomical body formed by the impact of a smaller object
moons and asteroids. On other planets and moons that experience more active surface geological processes, such as Earth, Venus, Europa, Io, Titan, and Triton
Impact_crater
Radio telescope in Guizhou, China
world's largest single-dish telescope. It has a novel design, using an active surface made of 4,500 metal panels which form a moving parabola shape in real
Five-hundred-meter Aperture Spherical Telescope
Five-hundred-meter_Aperture_Spherical_Telescope
Missile guidance technique
Active radar homing (ARH) is a missile guidance method in which a missile contains a radar transceiver (in contrast to semi-active radar homing, which
Active_radar_homing
Shaping technology for reflecting telescopes
Telescope Active surface – similar technology for radio telescopes. List of telescope parts and construction Hardy, John W. (June 1977). "Active optics:
Active_optics
aerially accessible open space including at least one operationally active surface such as a runway for a plane to take off or a helipad, and often includes
Lists_of_airports
Naval continuous wave fire-control radar
Aegis Combat System. It provides terminal target illumination for semi-active surface-to-air missiles. The antenna is mechanically steered, uses a parabolic
AN/SPG-62
Rupture in a planet's crust where material escapes
floor. In shallow water, active volcanoes disclose their presence by blasting steam and rocky debris high above the ocean's surface. In the deep ocean basins
Volcano
Traditional Chinese art of design-cutting
It refers to cutting a design into the bottom face of the seal (the active surface used for stamping, rather than the sides or top). It is also known as
Seal_carving
Smallest Galilean moon of Jupiter
indicates a young and active surface: based on estimates of the frequency of cometary bombardment that Europa experiences, the surface is about 20 to 180
Europa_(moon)
Digital pen made by Microsoft
The Surface Pen is an active stylus and digital pen developed by Microsoft for its series of Surface computing devices. It is designed to showcase the
Surface_Pen
Porous material with a high specific surface area supporting a catalyst
heterogeneous catalysis is leaching, a form of deactivation where active species on the surface of a solid catalyst are lost in the liquid phase. Leaching is
Catalyst_support
Offset at ground-level after earthquakes
that is built across a fault zone that may be active, in addition to any risk from ground shaking. Surface rupture entails vertical or horizontal movement
Surface_rupture
Chemical compound
only stable form of aluminum oxide, does not have such a chemically active surface and is not used as a sorbent. Activated alumina is used for a wide range
Activated_alumina
Geological fault likely to be the source of an earthquake sometime in the future
earthquakes as a cause. Effects of movement on an active fault include strong ground motion, surface faulting, tectonic deformation, landslides and rockfalls
Active_fault
Acoustic sensing method
helicopters) and by noisy platforms (most surface ships) but rarely by submarines. When active sonar is used by surface ships or submarines, it is typically
Sonar
Innermost Galilean moon of Jupiter
revealed Io to be a geologically active world, with numerous volcanic features, large mountains, and a young surface with no obvious impact craters. The
Io_(moon)
Treadmill which can convey objects in two dimensions
cost, more restricted device. The immersive vision is that of a large active surface upon which the user is able to walk freely and unfettered. The second
Omnidirectional_treadmill
rankings-related records are based on ATP rankings, which began in 1973. The names of active players appear in boldface. Last updated February 1, 2026 Updated as of
Open Era tennis records – Men's singles
Open_Era_tennis_records_–_Men's_singles
This is a list of active Brazilian Navy ships. The Navy has approximately 63 ships in commission, including 10 major surface combatants, 6 submarines,
List of active Brazilian Navy ships
List_of_active_Brazilian_Navy_ships
Astronomy telescope in Mexico
waves in the wave lengths from approximately 0.85 to 4 mm. It has an active surface with a diameter of 50 metres (160 ft) and 1,960 square metres (21,100 sq ft)
Large_Millimeter_Telescope
Technique of both listening to what is said and replying with an accurate summary
listening. Integrating active listening into these interactions promotes trust and encourages participants to move beyond surface-level exchanges. With
Active_listening
Study of physical and chemical phenomena that occur at the interface of two phases
catalytically active metal particles and supporting oxides; these are produced by growing ultra-thin films or particles on a single crystal surface. Relationships
Surface_science
Fourth planet from the Sun
Probes have been active on Mars continuously since 1997. At times, more than ten probes have simultaneously operated in orbit or on the surface, more than at
Mars
Motor car race
previous layout; although Mexico City was located on a geologically active surface; so the circuit was very bumpy- and the most fearsome and spectacular
1986_Mexican_Grand_Prix
Israeli naval defense radar system
providing guidance illumination and mid course updates to both active and semi-active surface-to-air missiles and anti-ship missiles, with multiple simultaneous
EL/M-2248_MF-STAR
Ground-launched missile designed to attack aerial targets
A surface-to-air missile (SAM), also known as a ground-to-air missile (GTAM) or surface-to-air guided weapon (SAGW), is a missile designed to be launched
Surface-to-air_missile
Methods of removing contaminants from underwater surfaces
removal of the surface of some anti-fouling coatings may actually improve the performance by exposing a fresh layer with more concentrated active materials
In-water_surface_cleaning
Electric charges present on the surface of a solid
A surface charge is an electric charge present on a two-dimensional surface. These electric charges are constrained on this 2-D surface, and surface charge
Surface_charge
Sand- to boulder-sized particle of debris in the Solar System
features of many of those objects. On other planets and moons with active surface geological processes, such as Earth, Venus, Mars, Europa, Io, and Titan
Meteoroid
Algebraic variety of dimension two
and early 20th centuries. It remains an active field of research. In the simplest cases, algebraic surfaces are studied as algebraic varieties over the
Algebraic_surface
devices. They are most relevant for devices where the electronic active area is near a surface, as is the case in two-dimensional electron systems and in quantum
Surface_phonon
Radio telescope in Green Bank, WV, US
The surface area of the GBT is a 100-by-110-meter active surface with 2,209 actuators (small motors used to adjust the position) for the 2,004 surface panels
Green_Bank_Telescope
Wind turbine component
a device is able to exert very high braking forces due to the high active surface. This is achieved with a simple industrial air pressure compression
Yaw_system
interference from the matrix molecules of MALDI. SALDI substituted an active surface of specific substrates, usually made of inorganic components, for the
Surface-assisted laser desorption/ionization
Surface-assisted_laser_desorption/ionization
Electrochemical process
application of CO stripping is the determination of the electrochemically active surface area ( E C S A {\displaystyle ECSA} ). Compared to hydrogen adsorption/desorption
CO_stripping
Large baleen whale species
bottlenose dolphins. Humpbacks are highly active at the surface, performing aerial behaviors such as breaching, surface slapping with the tail fluke (lobtailing)
Humpback_whale
Topics referred to by the same term
activity Surfactant, a surface active agent This disambiguation page lists articles associated with the title Surface activity. If an internal link incorrectly
Surface_activity
Surface coated by antimicrobials to inhibit microbial growth
antimicrobial surface is coated by an antimicrobial agent that inhibits the ability of microorganisms to grow on the surface of a material. Such surfaces are becoming
Antimicrobial_surface
Medium to long-range surface-to-air missile
navigation system and active radar seeker guidance as the Barak-8, although some modifications to the software and to the missile control surfaces are likely. The
Barak_8
Type of missile guidance system
Semi-active radar homing (SARH) is a common type of missile guidance system, perhaps the most common type for longer-range air-to-air and surface-to-air
Semi-active_radar_homing
Average measure of particle size
having the same volume/surface area ratio as the entire spray. SMD is especially important in calculations where the active surface area is important. Such
Sauter_mean_diameter
Component of stress coplanar with a material cross section
redox reaction. The ion disappearance occurs only on the microprobe active surface, causing the development of the diffusion boundary layer, in which the
Shear_stress
Compact region at a galaxy's center with abnormally high luminosity
An active galactic nucleus (AGN) is a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum
Active_galactic_nucleus
Layer of topsoil above permafrost
depth in permafrost areas, due to solar heating of the surface. Thus, the primary determinant of active layer thickness is the maximum temperature attained
Active_layer
Depression caused by an impact or geologic activity
moons and asteroids. On other planets and moons that experience more active surface geological processes, such as Earth, Venus, Europa, Io and Titan, visible
Crater
launched the Surface Mouse alongside the Surface Keyboard. It is compatible with any Bluetooth-enabled device. Most Surface tablets have an active pen that
List of Microsoft Surface accessories
List_of_Microsoft_Surface_accessories
Pile built of accumulated spoil
OCLC 893682144. Humphries, Neil (2013-03-01). "CASE STUDY: The Contribution of Active Surface Mines in the Conservation of Lichen Communities in the South Wales Coalfield
Spoil_tip
Type of automotive suspension
caused by the road surface. Active suspensions are divided into two classes: true active suspensions, and adaptive or semi-active suspensions. While adaptive
Active_suspension
Software framework by Microsoft introduced in 1996
Retrieved 12 March 2009. The term ActiveX surfaced in the Microsoft world in early 1996. "Microsoft announces ActiveX Technologies". News Center. Microsoft
ActiveX
Analytical methodology in spectroscopy
a vital tool for surface chemistry. Nanotechnology, used in materials science, involves active catalytic sites on a reagent surface with at least one
Operando_spectroscopy
Natural satellite orbiting Earth
bright ray-like streaks. The Moon was volcanically active until 1.2 billion years ago, surfacing lava mostly on the thinner near side of the Moon, filling
Moon
Type of input device
computer Microsoft Tablet PC Surface Pen Samsung Galaxy Note series Universal Stylus Initiative Hughes, Andrew (2011). "Active Pen Input and the Android
Active_pen
Materials testing procedure
on the object surface by infrared techniques, such as in the case of ultrasound excitation. A lot of methods were developed for active thermography for
Active_thermography
Planet that is composed primarily of silicate rocks or metals
Among these bodies, only the Earth has an active surface hydrosphere. Europa is believed to have an active hydrosphere under its ice layer. During the
Terrestrial_planet
Theory describing chemical reaction rates
should be normalized to the concentration of active surface sites, an approximation called the surface reactant equi-density approximation (SREA). Curtin–Hammett
Transition_state_theory
Strait in British Columbia
Active Pass (Saanich: SḴŦAḴ) is a strait separating Galiano Island in the north and Mayne Island in the south in the southern Gulf Islands, British Columbia
Active_Pass
Chemical compound
usually porous, and the BET surface area can range from less than 100 m2/g to several hundred m2/g. The very large active surface makes synthetic magnesium
Synthetic_magnesium_silicate
American band
Surface was an American music group formed New Jersey, beginning in 1983. They are best known for their No. 1 pop and R&B hit "The First Time". During
Surface_(band)
Missile designed to detect and home on an enemy radio emission source
examples are: JDAM and JDAM-ER, air-to-surface GPS bomb AMRAAM, active radar homing air-to-air missile R-77, active radar homing air-to-air missile Unlike
Anti-radiation_missile
Active stylus protocol developed by Microsoft
Pen Protocol (MPP) is an active-pen communication protocol developed by Microsoft for digital pen input on Microsoft Surface and other Windows devices
Microsoft_pen_protocol
Cancelled NASA lander for Europa
hydrothermal energy and chemistry. A surface mission can take advantage of the relatively young, active surface of Europa as this activity may allow deep
Europa_Lander
2-in-1 PC by Microsoft
own active cooling system. The device contains two USB 3.0 Gen-1 ports, a USB-C port, 3.5 mm headphone jack, full-sized SD card slot, and two Surface Connect
Surface_Book_2
Noninvasive type of medical imaging
signal-to-noise ratio, e.g., by using active surface electrodes, further reduces imaging errors. Some of the latest EIT systems with active electrodes monitor the performance
Electrical impedance tomography
Electrical_impedance_tomography
Missile designed to be launched from aircraft
or active radar homing, which is less effective against multiple, small, fast-moving land targets. There is some cross-over between air-to-surface missiles
Air-to-surface_missile
Measurement of physical and chemical properties of nanoparticles
porosity and other surface irregularities and therefore may be inaccurate. Real-time diffusion chargers measure the "active surface area", the area of
Characterization of nanoparticles
Characterization_of_nanoparticles
Catalytic process
still in its infancy, there are clear advantages to utilizing a plasmon-active surface over traditional photocatalysts. Their ability to utilize energy from
Plasmonic_catalysis
2-in-1 detachable by Microsoft
Surface 3 is a 2-in-1 detachable from the Microsoft Surface series, introduced by Microsoft in 2015. Unlike its predecessor, the Surface 2, Surface 3
Surface_3
indicated in bold. A surface sweep refers to the achievement of winning all of the Big Titles tied to a specific court surface at least once during a
List of ATP Big Titles singles champions
List_of_ATP_Big_Titles_singles_champions
Type of ion-surface binding
adsorbed ions that can bind to the surface through covalent bonding. Inner sphere complexes describe active surface sites that are involved in nucleation
Inner_sphere_complex
This is a list of active ships of the Royal Swedish Navy. These ships are operated by the 1st Submarine Flotilla which is based at the Karlskrona Naval
List of active Swedish Navy ships
List_of_active_Swedish_Navy_ships
Shipborne multi-function radar
Active Phased Array Radar (APAR) is a shipborne active electronically scanned array multifunction 3D radar (MFR) developed and manufactured by Thales Nederland
Active_Phased_Array_Radar
Planned NASA orbiter mission to Venus
and active volcanism on Venus, but the extent of this volcanic activity is not completely known. Moreover, it is unknown to what degree surface water
VERITAS_(spacecraft)
Corps Aviation#Current inventory List of currently active United States naval aircraft List of active United States Air Force aircraft List of military
List of active United States military aircraft
List_of_active_United_States_military_aircraft
Variant surface glycoprotein (VSG) is a ~60kDa protein which densely packs the cell surface of protozoan parasites belonging to the genus Trypanosoma
Variant_surface_glycoprotein
Spectroscopic technique
Surface-enhanced Raman spectroscopy or surface-enhanced Raman scattering (SERS) is a surface-sensitive technique that enhances Raman scattering by molecules
Surface-enhanced Raman spectroscopy
Surface-enhanced_Raman_spectroscopy
Power generation technology
benchmarking is the electrochemical surface area (ECSA) which accounts for the actual catalyst surface that actively partake in redox reactions. Its knowledge
Proton-exchange membrane fuel cell
Proton-exchange_membrane_fuel_cell
One of the five fighting arms of the British Royal Navy
Surface vessels form one of the five fighting arms of the Royal Navy. During much of the medieval period, fleets or "king's ships" were often established
Surface vessels of the Royal Navy
Surface_vessels_of_the_Royal_Navy
Viscous water-insoluble liquid
hydrocarbons and is hydrophobic and lipophilic. Oils are usually flammable and surface active. Most oils are unsaturated lipids that are liquid at room temperature
Oil
Type of semiconductor laser diode
distributed Bragg reflector (DBR) mirrors parallel to the wafer surface with an active region consisting of one or more quantum wells for the laser light
Vertical-cavity surface-emitting laser
Vertical-cavity_surface-emitting_laser
Radio telescope
000 kg). The primary mirror is 64 metres (210 ft) in diameter. It has an active surface consisting of 1008 aluminum panels in 14 rows. Each panel has an area
Sardinia_Radio_Telescope
United States Navy occupational rating
colloquially referred to[by whom?] as "ping jockeys" on board surface vessels, after the sound of active sonar. They are also referred to as “shower techs” by
Sonar_technician
Form of carbon with an extremely high surface area
light, fluffy, and its kernels have a high surface-area-to-volume ratio. Activated is sometimes replaced by active. Because it is so porous on a microscopic
Activated_carbon
Physical phenomenon
a surface wave is a mechanical wave that propagates along the interface between differing media. A common example is gravity waves along the surface of
Surface_wave
Hypothesis that complex extraterrestrial life is improbable and extremely rare
has since been found to be quite the contrary, with a geologically active surface possessing organic molecules and mountain ranges like Tenzing Montes
Rare_Earth_hypothesis
American energy company
coal from ten regional business units supported by active underground mines, seven active surface mines and four coal preparation plants located throughout
HDG_International_Group
Type of automobile suspension technology
Active Body Control, or ABC, is the Mercedes-Benz brand name used to describe electronically controlled hydropneumatic suspension. This suspension improves
Active_Body_Control
Effects of a drug on living things
a complex chemical mixture, this activity is exerted by the substance's active ingredient or pharmacophore but can be modified by the other constituents
Biological_activity
Rate of air temperature movement
convection. Radiative heat gains are absorbed by active and non-active cooling surfaces. If absorbed by active surfaces then heat gains become an instant cooling
Cooling_load
Missile used to attack ships
conceivably, even infantrymen firing shoulder-launched missiles. The term surface-to-surface missile (SSM) is used when appropriate. The longer-range anti-ship
Anti-ship_missile
Physico-chemical processes contributing to protect a surface against oxidation
When exposed to air, many metals naturally form a hard, relatively inert surface layer, usually an oxide (termed the "native oxide layer") or a nitride
Passivation_(chemistry)
Fault zone of the east coast of New Zealand's North Island
Island Shear Belt) is a set of southwest–northeast trending seismically-active faults in the North Island of New Zealand that carry much of the dextral
North_Island_Fault_System
Eleventh generation of Microsoft Surface Pro
supersede the Surface Pro 9 and Surface Pro X. It was released shortly after the Intel x86-based Surface Pro 10, and unveiled alongside the Surface Laptop (7th
Surface_Pro_(11th_generation)
American pop music duo
Surfaces is an American music group based in College Station, Texas. Their music is a blend of surf music, jazz, soul, pop rock, hip hop, reggae, and calypso
Surfaces_(band)
Surface that allows a pilot to adjust and control an aircraft's flight attitude
Flight control surfaces are aerodynamic devices allowing a pilot to adjust and control the aircraft's flight attitude. The primary function of these is
Flight_control_surfaces
Type of phased-array radar
3 Chū-SAM Medium Range Surface-to-Air MissileSystem (Chu-SAM, SAM-4) multifunction radar OPS-24 (The world's first Naval Active Electronically Scanned
Active electronically scanned array
Active_electronically_scanned_array
This is a list of active German Navy ships as of 2022. There are approximately 65 ships in commission including; 11 frigates, 5 corvettes, 2 minesweepers
List of active German Navy ships
List_of_active_German_Navy_ships
ACTIVE SURFACE
ACTIVE SURFACE
Boy/Male
British, English, Indian, Russian
Work
Boy/Male
English
Active.
Boy/Male
English
Active.
Boy/Male
Polish
Active.
Male
English
Pet form of English Ace, ACIE means "number one."
Boy/Male
English
Active.
Boy/Male
French American
Born eighth.
Boy/Male
Muslim
Active
Girl/Female
Slavic
Active.
Surname or Lastname
English
English : habitational name from any of various places, for example in Shropshire and Cheshire, named Clive, from the dative case of Old English clif ‘slope’, ‘bank’, ‘cliff’ (see Cliff), originally used after a preposition. In some cases the name may be topographical, with the same origin and meaning.
Girl/Female
Greek
Active.
Girl/Female
German
Active.
Male
English
English pet form of Celtic Arthur, possibly ARTIE means "bear-man."Â
Boy/Male
Indian
Active
Male
English
English surname transferred to forename use, from the name of various places, derived from Old English clif, CLIVE means "bank, cliff, slope."
Girl/Female
German
Active.
Girl/Female
Hindi
Active.
Girl/Female
Greek
Active.
Girl/Female
German
Active.
Boy/Male
Teutonic American English
Active.
ACTIVE SURFACE
ACTIVE SURFACE
Male
Gypsy/Romani
Albanian name BESNIK means "faithful; loyal." In use by the Romani.
Boy/Male
Indian, Sanskrit
Conquerer of the Mind
Girl/Female
English
Form of Sabrina: a princess.
Girl/Female
Tamil
Cloud
Boy/Male
Muslim
Desire
Girl/Female
Tamil
Sukritha | ஸà¯à®•à¯à®°à®¿à®¤à®¾
A person who does good things, Made good
Boy/Male
British, English, Welsh
David's Son; Surname; Variant of David; Beloved
Female
English
Variant spelling of English Amelia, EMELIA means "work."
Girl/Female
Indian
Goddess
Boy/Male
Native American
Guardian of the people.
ACTIVE SURFACE
ACTIVE SURFACE
ACTIVE SURFACE
ACTIVE SURFACE
ACTIVE SURFACE
a.
Not disposed to action or effort; not diligent or industrious; not busy; idle; as, an inactive officer.
a.
Having the power or quality of acting; causing change; communicating action or motion; acting; -- opposed to passive, that receives; as, certain active principles; the powers of the mind.
n.
Action.
a.
Quick in physical movement; of an agile and vigorous body; nimble; as, an active child or animal.
adv.
In an active signification; as, a word used actively.
a.
Doing; active.
a.
Not active; inert; esp., not exhibiting any action or activity on polarized light; optically neutral; -- said of isomeric forms of certain substances, in distinction from other forms which are optically active; as, racemic acid is an inactive tartaric acid.
a.
Given to action rather than contemplation; practical; operative; -- opposed to speculative or theoretical; as, an active rather than a speculative statesman.
a.
Applied to all verbs that express action as distinct from mere existence or state.
a.
Brisk; lively; as, an active demand for corn.
v. t.
To make active.
a.
Requiring or implying action or exertion; -- opposed to sedentary or to tranquil; as, active employment or service; active scenes.
n.
Any one of the active processes going on in an organism; the performance of a function; as, the action of the heart, the muscles, or the gastric juice.
adv.
In an active manner; nimbly; briskly; energetically; also, by one's own action; voluntarily, not passively.
a.
Applied to a form of the verb; -- opposed to passive. See Active voice, under Voice.
a.
Given to action; constantly engaged in action; energetic; diligent; busy; -- opposed to dull, sluggish, indolent, or inert; as, an active man of business; active mind; active zeal.
a.
Implying or producing rapid action; as, an active disease; an active remedy.
a.
In action; actually proceeding; working; in force; -- opposed to quiescent, dormant, or extinct; as, active laws; active hostilities; an active volcano.
a.
Acting in concurrence; united in action.
a.
Not active; having no power to move; that does not or can not produce results; inert; as, matter is, of itself, inactive.