42,772 articles
Maxwell fluid
A Maxwell fluid is an idealized viscoelastic material, proposed by James Clerk Maxwell in 1867, that models stress relaxation as a spring and dashpot in series.
Maxwell lattices
A Maxwell lattice is a mechanical frame with average coordination 2d, exactly balancing degrees of freedom and constraints, sitting on the verge of mechanical instability.
Maxwell model
The Maxwell model is a linear viscoelastic model in rheology that represents a material as a spring and dashpot in series, describing stress relaxation in polymers and soft matter.
Maxwell relations
The Maxwell relations, also called Maxwell's thermodynamic relations, are four thermodynamic equations equating partial derivatives of temperature, pressure, volume, and entropy, letting measurable quantities replace unmeasurable entropy derivatives.
Maxwell stress tensor
The Maxwell stress tensor, also called the electromagnetic stress tensor, is a second-rank tensor giving the mechanical force per unit area transmitted by an electromagnetic field, used to compute electromagnetic forces and momentum conservation.
Maxwell–Boltzmann distribution
The Maxwell–Boltzmann distribution, or Maxwell distribution, gives the probability of molecular speeds in an ideal gas at thermal equilibrium, derived by James Clerk Maxwell in 1859 and extended by Ludwig Boltzmann in 1868.
Maxwell–Boltzmann statistics
Maxwell–Boltzmann statistics, also known as Boltzmann statistics, is the classical statistical description of identical, distinguishable particles in thermal equilibrium; applied to gases, it yields the Maxwell–Boltzmann distribution of molecular speeds, derived by Maxwell in 1860.
Maxwell's demon
Maxwell's demon is a thought experiment by James Clerk Maxwell in which a being sorts gas molecules by speed, apparently violating the second law of thermodynamics.
Maxwell's equations
Maxwell's equations are the four coupled laws, including Gauss's law and Faraday's law, that govern electric and magnetic fields and underlie all of classical electromagnetism.
Maxwell's equations in covariant form
Maxwell's equations in covariant form are two tensor equations, ∂μ F^μν = μ0 J^ν and ∂[α Fβγ] = 0, that combine the four 3-vector Maxwell equations and display Lorentz invariance.
May 2011 United States tornado outbreak
A May 2011 tornado sequence headlined by the EF-5 Joplin, Missouri tornado on May 22, which killed 158 people, followed by an Oklahoma outbreak that killed 11.
May 2024 solar storms
The May 2024 solar storms, known as the Gannon storm, drove the first G5 extreme geomagnetic storm since 2003, with naked-eye aurora visible as far south as Mexico and India.
May Nyman
May Nyman is an American materials chemist, the Terence Bradshaw Chemistry Professor at Oregon State University since 2012, known for polyoxometalates and the first niobium heteropolyanions.
Maya calendar
The Maya calendar is a set of interlocking timekeeping systems developed by the Maya, combining a 260-day ritual count, a 365-day year, and the Long Count.
Maya numerals
Maya numerals, also called Mayan numerals, are the number symbols of the ancient Maya, a base-20 system using dots, bars, and a shell glyph for zero.
Mayall II
Mayall II, also called G1, is the brightest globular cluster of the Andromeda galaxy, containing at least 300,000 old stars and orbiting about 130,000 light-years from M31's nucleus.
Mayenite electride
Mayenite electride (C12A7:e⁻) is an inorganic electride in which electrons trapped in mayenite's crystal cages act as anions; it is best known as the electron-donating support for ruthenium ammonia synthesis catalysts.
Mayfly optimization algorithm
The mayfly optimization algorithm (MA) is a swarm-based metaheuristic introduced by Zervoudakis and Tsafarakis in 2020, combining particle swarm search with genetic crossover to optimize functions.
Mayon
Mayon (Bulkang Mayon), also called Mount Mayon, is the Philippines' most active volcano, a 2,462-meter stratovolcano on Luzon known for its near-perfect symmetrical cone, with eruptions recorded since 1616.
Maytansine
Maytansine is a cytotoxic natural product of the ansamycin family, isolated in 1972 from the Ethiopian shrub Maytenus serrata, that kills dividing cells by binding β-tubulin.
MB-pol water model
MB-pol is a data-driven many-body potential energy function for water, fitted entirely to high-level CCSD(T) ab initio data with no empirical parameters by Francesco Paesani's group at UC San Diego.
McArthur Forest Fire Danger Index
The McArthur Forest Fire Danger Index (FFDI) is an Australian index of bushfire danger in eucalypt forests, developed by Alan McArthur and used operationally from 1967.
McDiarmid's inequality
McDiarmid's inequality, also called the bounded differences inequality, is a concentration inequality stating that functions of independent random variables with bounded coordinate changes concentrate around their mean.
McDonald Observatory
McDonald Observatory is an astronomical observatory in West Texas's Davis Mountains, operated by The University of Texas at Austin and home to the Hobby-Eberly Telescope, one of the world's largest.
MCG-02-53-003
MCG-02-53-003, also known as the Aquarius Dwarf (DDO 210), is a faint dwarf irregular galaxy in Aquarius, on the isolated periphery of the Local Group.
MCG-03-01-015
MCG-03-01-015 is the Morphological Catalog of Galaxies designation for the Wolf–Lundmark–Melotte galaxy (WLM, also DDO 221), an isolated Local Group dwarf irregular in Cetus about 3 million light-years from Earth.
MCG-06-07-001
MCG-06-07-001, also cataloged as ESO 356-04, is the Fornax dwarf spheroidal galaxy, a small satellite of the Milky Way discovered by Harlow Shapley in 1938.
McKay correspondence
The McKay correspondence, first observed by John McKay in 1980, links finite subgroups of SU(2) to affine ADE Dynkin diagrams via the irreducible representations of each group.
McKay graph
The McKay graph, or McKay quiver, is a graph encoding how a finite group's irreducible representations combine by tensor product with a chosen representation, introduced by John McKay around 1980.
McLaughlin group
The McLaughlin group (McL) is one of the 26 sporadic finite simple groups, of order 898,128,000, discovered by Jack McLaughlin in 1969 and tied to the Leech lattice and the McLaughlin graph on 275 vertices.