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The total active reflection coefficient (TARC) within mathematics and physics scattering theory, relates the total incident power to the total outgoing
Total active reflection coefficient
Total_active_reflection_coefficient
The active reflection coefficient (ARC) is the reflection coefficient for a single antenna element in an array antenna, in the presence of mutual coupling
Active_reflection_coefficient
Measure used in radio engineering and telecommunications
Mismatch loss Return loss SWR meter Time-domain reflectometer Total active reflection coefficient Knott, Eugene F.; Shaeffer, John F.; Tuley, Michael T. (2004)
Standing_wave_ratio
Topics referred to by the same term
secreted protein of the immune system, also known as CCL17 Total active reflection coefficient, a measure of multi-port radio antennas Transit Authority
TARC
Graphical calculator used in electrical engineering
transmission line and impedance-matching problems. It plots a complex reflection coefficient ( Γ {\displaystyle \Gamma } ) on a grid of normalized electrical
Smith_chart
Set of multiple antennas which work together
account the worst possible excitations. Digital antenna array Total active reflection coefficient Wikimedia Commons has media related to Array antennas. Carr
Antenna_array
Tendency of matter to change volume in response to a change in temperature
strain) divided by the change in temperature is called the material's coefficient of linear thermal expansion. For small temperature changes, this is nearly
Thermal_expansion
Spectroscopy technique
than reflection, and considered scatter to be in all directions. He used the symbols k and s for absorption and isotropic scattering coefficients, and
Diffuse reflectance spectroscopy
Diffuse_reflectance_spectroscopy
Physical process by which matter takes up a photon's energy and stores it
"absorption coefficient")[citation needed] The Molar attenuation coefficient (also called "molar absorptivity"), which is the absorption coefficient divided
Absorption (electromagnetic radiation)
Absorption_(electromagnetic_radiation)
Values which describe behavior of a linear electric circuit
such as gain, return loss, voltage standing wave ratio (VSWR), reflection coefficient and amplifier stability. The term 'scattering' is more common to
Scattering_parameters
Property in optics
when reaching the interface, as well as the critical angle for total internal reflection, their intensity (Fresnel equations) and Brewster's angle. The
Refractive_index
Strength of an object's radar echo
one-dimensional reflection calculations to calculate the surface impedance, then two dimensional numerical calculations to calculate the diffraction coefficients of
Radar_cross_section
Property that an increasing voltage results in a decreasing current
in the opposite direction, toward the resonator part. The reflection coefficient of the active device Γ N = V 2 / V 1 {\displaystyle \Gamma _{N}=V_{2}/V_{1}}
Negative_resistance
Acoustic sensing method
region long after the conflict has ceased. The sound reflection characteristics of the target of an active sonar, such as a submarine, are known as its target
Sonar
Property of waves that can oscillate with more than one orientation
actual reflection coefficient (which requires careful photometric calibration of the illuminating beam) but the ratio of the p and s reflections, as well
Polarization_(waves)
Device for measuring a physical quantity
thermometer principle: relation between temperature and volume of a liquid (coefficient of thermal expansion). Alcohol thermometer Mercury-in-glass thermometer
List_of_measuring_instruments
matrix analysis Reflecting telescope Reflection (optics) Refracting telescope Refraction Reflection coefficient Refractive index Refractometer Retroreflector
Index_of_optics_articles
Light-conducting fiber
of refraction. Light is kept in the core by the phenomenon of total internal reflection which causes the fiber to act as a waveguide. Fibers that support
Optical_fiber
Infrared imaging used to reveal temperature
with an emissivity coefficient of 0.02. An example of a substance with high emissivity would be asphalt, with an emissivity coefficient of .98. A black body
Thermography
Optical filter
retained in the limit. For dual FSS, the reflection coefficient of the patch will be equal to the transmission coefficient of the mesh. Circuit duality The dual
Frequency_selective_surface
Obtaining information through non-contact sensors
split into "active" remote sensing (when a signal is emitted by a sensor mounted on a satellite or aircraft to the object and its reflection is detected
Remote_sensing
Meteorological instrumentation
light beam is quantified as an attenuation coefficient. Any departure from the clear air extinction coefficient (e.g. in fog) is measured and is inversely
Scatterometer
Using sunlight for internal lighting
expressed by its VT coefficient (Visual Transmittance), also known as visual light transmittance (VLT). As the name suggests, this coefficient measures how much
Daylighting_(architecture)
Battery electric mid-size luxury SUV
Counts，提升 14km 续航 [Xiaomi Motors: YU7's 100-step active air intake grille can reduce the vehicle's drag coefficient by 18 counts and increase its range by 14km
Xiaomi_YU7
Data acquisition method for earth sciences
overall reflectance increases as diffuse reflection, instead of specular reflection, dominates. Specular reflection by smooth surface, for example calm water
Remote_sensing_in_geology
Type of feedforward neural network
kernel coefficients directly from images of hand-written numbers. Learning was thus fully automatic, performed better than manual coefficient design,
Convolutional_neural_network
Object detection system using radio waves
to "odd" looking stealth aircraft. These precautions do not totally eliminate reflection because of diffraction, especially at longer wavelengths. Half
Radar
Pressure exerted upon any surface exposed to electromagnetic radiation
the reflection coefficient of intensity), so that the increase is less than double. For a diffusely reflective surface, the details of the reflection and
Radiation_pressure
Type of artificial neural network
reflection. Translation is a change in location in one or more dimensions. Rotation is a change in orientation. Scale is a change in size. Reflection
Capsule_neural_network
Optical device with parallel mirrors
preferred because it has greater heat conduction and still has a low coefficient of expansion. In 2005, some telecommunications equipment companies began
Fabry–Pérot_interferometer
Branch of physics that studies light
called total internal reflection and allows for fibre optics technology. As light travels down an optical fibre, it undergoes total internal reflection allowing
Optics
Statistical method
between lasso coefficient estimates and so-called soft thresholding. It also reveals that (like standard linear regression) the coefficient estimates do
Lasso_(statistics)
Battery electric full-size sedan
dampers, an active shutter grille, and an active rear wing with four adjustment levels on higher end models. The company claims the drag coefficient of the
Xiaomi_SU7
Smallest amount of fissile material needed to sustain a nuclear reaction
expansion associated with temperature increase also contributes a negative coefficient of reactivity since fuel atoms are moving farther apart. A mass that
Critical_mass
Type of statistical analysis
crystals, and phase-separated polymers and RNA/protein condensates. Total internal reflection fluorescence (TIRF) is a microscopy approach that is only sensitive
Fluorescence correlation spectroscopy
Fluorescence_correlation_spectroscopy
1887 investigation of the speed of light
were all negative. This could be explained by using Fresnel's dragging coefficient, according to which the aether and thus light are partially dragged by
Michelson–Morley_experiment
light in a subwavelength-scale low refractive index region by total internal reflection. A slot-waveguide consists of two strips or slabs of high-refractive-index
Slot-waveguide
Type of optical fiber
outer cladding. This enables the inner cladding to guide light by total internal reflection in the same way the core does, but for a different range of wavelengths
Double-clad_fiber
Modes of vibration in mathematics
conjecture S. Bedo; W. Luthy; H. P. Weber (1993). "The effective absorption coefficient in double-clad fibers". Optics Communications. 99 (5–6): 331–335. Bibcode:1993OptCo
Dirichlet_eigenvalue
Device that orients a payload towards the Sun
increasing path length is referred to as the air mass (AM) or air mass coefficient, where AM0 is at the top of the atmosphere, AM1 refers to the direct
Solar_tracker
Study of the propagation of sound in water
assigning a reflection coefficient whose magnitude is less than one. For example, close to normal incidence, the reflection coefficient becomes R = −
Underwater_acoustics
Cable assembly containing one or more optical fibers that are used to carry light
Optical fiber consists of a core and a cladding layer, selected for total internal reflection due to the difference in the refractive index between the two
Fiber-optic_cable
is one of the world's wealthiest countries per capita, but its Gini coefficient is high in comparison to developed countries. Statistics on income inequality
Economy_of_Singapore
Opposition of a circuit to a current when a voltage is applied
displayed; for example, in a radio antenna, the standing wave ratio or reflection coefficient may be more useful than the impedance alone. The measurement of
Electrical_impedance
Type of non-invasive imaging technique
Fluorescence imaging with one nanometer accuracy (FIONA): utilizes total internal reflection illumination to reduce noise and increase brightness of fluorophores
Fluorescence_imaging
Chemical element with atomic number 8 (O)
Fertility of Sea Waters by H.W. Harvey, 1955, citing C.J.J. Fox, "On the coefficients of absorption of atmospheric gases in sea water", Publ. Circ. Cons. Explor
Oxygen
Physical property of allowing light
waveguide that transmits light along its axis by the process of total internal reflection. The fiber consists of a core surrounded by a cladding layer.
Transparency_and_translucency
Type of intelligence gathering
sounds is scattered, and this is taken into account by assigning a reflection coefficient whose magnitude is less than one. Rather than measuring surface
Geophysical_MASINT
Device that emits light via optical amplification
lasers or laser amplifiers where the light is guided due to the total internal reflection in a single mode optical fiber are instead called fiber lasers
Laser
Theory of interwoven space and time by Albert Einstein
theoretical explanations were proposed to explain Fresnel's dragging coefficient, that were completely at odds with each other. Even before the Michelson–Morley
Special_relativity
Electric charge generated in certain solids due to mechanical stress
s66 = 1/G12, where G12 is the shear modulus. In total, there are four piezoelectric coefficients, dij, eij, gij, and hij defined as follows: d i j =
Piezoelectricity
Array of antennas creating a steerable beam
imaging scanners (phased array ultrasonics), oil and gas prospecting (reflection seismology), and military sonar systems. The term "phased array" is also
Phased_array
Quantum optical theoretical system
{\displaystyle n_{0}={\frac {1}{3}}(2m-2s+\alpha +1)} , and differential coefficient C x = s ( s + 1 ) − x ( x + 1 ) {\displaystyle C_{x}={\sqrt {s(s+1)-x(x+1)}}}
Tavis–Cummings_model
Smallest type of blood vessel
pressure (πc) Interstitial oncotic pressure (πi) Filtration coefficient (Kf) Reflection coefficient (σ) Disorders of capillary formation as a developmental
Capillary
Ionized part of Earth's upper atmosphere
ultraviolet radiation from the Sun. Heaviside and Kennelly proposed atmospheric reflection as a model for long-range radio wave propagation, in which the electrically
Ionosphere
Object that reflects an image
they strike the mirror (incident light). This property, called specular reflection, distinguishes a mirror from objects that diffuse light, breaking up the
Mirror
Country in West Asia
International Monetary Fund. 14 April 2026. Retrieved 18 April 2026. "Gini Index coefficient". The World Factbook. Archived from the original on 26 January 2026.
Israel
Polarization state
and s linear polarizations are found by applying the Fresnel coefficients of reflection, which are generally different for those two linear polarizations
Circular_polarization
Signal processing filter
change by any appreciable amount. Typically, 15 to 25 iterations produce coefficient differences in the order of than 1.e-15. To illustrate the steps, the
Elliptic_filter
between the phases according to its partition coefficient which is also called the distribution coefficient, distribution constant, or partition ratio and
Countercurrent_chromatography
Species of bovid mammal
from the multiple extreme population bottlenecks in the TSBH led to a coefficient of inbreeding of 0.367, equal to the level of inbreeding that results
American_bison
Mathematical transform that expresses a function of time as a function of frequency
expansion as a trigonometric integral, or a Fourier integral expansion. The coefficient functions a and b can be found by using variants of the Fourier cosine
Fourier_transform
Optical Cavity
design interfaces such that light ray paths fulfill total internal reflection conditions or Bragg reflection conditions. For light confined within much smaller
Nanophotonic_resonator
Surface-sensitive spectroscopy technique
strength can be improved by using special geometries, such as a total internal reflection setup which uses a prism to change the angles so they are close
Sum frequency generation spectroscopy
Sum_frequency_generation_spectroscopy
Matrix representing a Euclidean rotation
rotation combines a proper rotation with reflections (which invert orientation). In other cases, where reflections are not being considered, the label proper
Rotation_matrix
Laws in physics about force and motion
\mathbf {v} +\mathbf {\xi } \,} where γ {\displaystyle \gamma } is a drag coefficient and ξ {\displaystyle \mathbf {\xi } } is a force that varies randomly
Newton's_laws_of_motion
Country in Northern Europe
Outlook Database, October 2025: Edition (Latvia)". October, 14 2025. "Gini coefficient of equivalised disposable income". Eurostat. Archived from the original
Latvia
Ratio of energy extracted from sunlight in solar cells
transmission and reflection. Measures can be taken to reduce these losses. The reflection losses, which can account for up to 10% of the total incident energy
Solar-cell_efficiency
or a pull, a torque can be thought of as a twist to an object. total internal reflection toughness The ability of a material to absorb energy and plastically
Glossary_of_physics
Solar-cell architecture
performance derating of 93% were announced by Enel in 2022. The temperature coefficient refers to how the output power of a solar module changes with temperature
Heterojunction_solar_cell
XEU before 1999). These averages conceal wide intra-year spreads. The coefficient of variation gives an indication of this. It also shows the extent to
Economy_of_the_United_Kingdom
Mathematical models of strategic interactions
altruist must be less than the benefit b to the recipient multiplied by the coefficient of relatedness r. The more closely related two organisms are causes the
Game_theory
Form of carbon
the highest sound velocity. It has low adhesion and friction, and its coefficient of thermal expansion is extremely low. Its optical transparency extends
Diamond
Country in Southern Africa
some 56% lived below the poverty line in 2014. Having the highest Gini coefficient of 0.67, South Africa is considered one of the most economically unequal
South_Africa
Thin layer of material
substrate surface. The interaction is characterized by the sticking coefficient, the fraction of incoming species thermally equilibrated with the surface
Thin_film
Personality trait
characterized introverts as people whose energy tends to expand through reflection and dwindle during interaction. This is similar to Jung's view, although
Extraversion_and_introversion
Number, approximately 1.618
with rational coefficients, it is an algebraic number. Its minimal polynomial, the polynomial of lowest degree with integer coefficients that has the golden
Golden_ratio
Form of electromagnetic radiation
semiconductor wafer, the index of refraction (n) and the extinction Coefficient (k) can be determined via the Forouhi–Bloomer dispersion equations. The
Infrared
Method of spatial measurement using laser
densities of clouds, cloud particle properties (extinction coefficient, backscatter coefficient, depolarization), temperature, pressure, wind, humidity,
Lidar
(1999), Federal Guidance Report 13, page 16: "For example, the ingestion coefficient risk for 40K would not be appropriate for an application to ingestion
List of common misconceptions about science, technology, and mathematics
List_of_common_misconceptions_about_science,_technology,_and_mathematics
Country in Central Europe
International Monetary Fund. 14 April 2026. Retrieved 14 April 2026. "Gini coefficient of equivalised disposable income – EU-SILC survey". ec.europa.eu. Eurostat
Slovenia
Device that transmits and receives radio waves
horizontally polarized antenna reflects off the ground, with almost total reflection at the grazing angles important for ground wave propagation. That reflected
Antenna_(radio)
British economist (1883–1946)
with his conventional coefficient of risk and weight, c, in chapter 26. In addition to his academic work, the 1920s saw Keynes active as a journalist selling
John_Maynard_Keynes
would have a yearly income of $5,150. The difference in income is also a reflection of the difference in retirement payments to urban retirees versus rural
Economy_of_China
First jet aircraft in U.S. operational service
200 lb (5,534 kg) Max takeoff weight: 16,856 lb (7,646 kg) Zero-lift drag coefficient: 0.0134 Frontal area: 32 sq ft (3.0 m2) Powerplant: 1 × Allison J33-A-35
Lockheed_P-80_Shooting_Star
most egalitarian, according to the calculation provided by the Gini coefficient. From 2006 onwards, the economy faced problems of growing inflation and
Economy_of_Iceland
Device used to produce electricity from light
which increases light collection owing to light trapping from total internal reflection of light within the resin. Research has been conducted into structuring
Solar_cell
Spread of world views, products, ideas, capital and labor
traditional metrics, such as GDP, and look to other measures, such as the Gini coefficient or the Happy Planet Index, and point to a "multitude of interconnected
Globalization
Country in the Horn of Africa
original on 20 November 2023. Retrieved 20 October 2023. "Gini Index coefficient". CIA World Factbook. Archived from the original on 17 July 2021. Retrieved
Djibouti
Type of energy transfer
Heat recovery steam generator Heat recovery ventilation Heat transfer coefficient Heat wave History of heat Orders of magnitude (temperature) Relativistic
Heat
Pseudoscience linking character and blood type
subjects found that six genes affected human personality. However, the coefficient of determination was as low as 0.04%. This is usually considered to be
Blood_type_personality_theory
Megathrust earthquake off Japan's east coast
coupling coefficient surrounded by areas of relatively low coupling coefficients in the west, north, and south. From the averaged coupling coefficient of 0
2011 Tōhoku earthquake and tsunami
2011_Tōhoku_earthquake_and_tsunami
Winners of satirical science award
Kiyoshi; Tanaka, Kensei; Uchijima, Daichi; Sakai, Rina (2012). "Frictional Coefficient under Banana Skin". Tribology Online. 7 (3): 147–151. doi:10.2474/trol
List of Ig Nobel Prize winners
List_of_Ig_Nobel_Prize_winners
number of active hedge funds doubled to 60. Israel-based hedge funds have registered an increase of 162% from 2006 to 2012, when they managed a total of $2
Economy_of_Israel
Microstate in Southern Europe
World Economic Outlook (April 2026). Retrieved 21 July 2026. "Gini coefficient (income)". Departament d'Estadística. Government of Andorra. 2024 data
Andorra
Developmental model adopted in Kerala
38000 beds for the total population, making the population to bed ratio 879—one of the highest in the country. There is an active, state-supported nutrition
Kerala_model
Theory of gravitation as curved spacetime
symbols (sometimes called the affine connection coefficients or Levi-Civita connection coefficients) which is symmetric in the two lower indices. Greek
General_relativity
Natural internal process that regulates the sleep-wake cycle
temperature compensation. The Q10 temperature coefficient is a measure of this compensating effect. If the Q10 coefficient remains approximately 1 as temperature
Circadian_rhythm
Class of instruments
1960s. EBLs detect the total backscattered signal (particle and molecular contributions). Profiles of the extinction coefficient have to be estimated using
Atmospheric_lidar
Country in Central Europe
In 2016, the armed forces had 31,080 personnel on active duty, the operative reserve brought the total number of troops to fifty thousand. In 2016, it was
Hungary
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