Linear elasticityLinear elasticity is a mathematical model of how solid objects deform and become internally stressed due to prescribed loading conditions. It is a simplification of the more general nonlinear theory of elasticity and a branch of continuum mechanics. The fundamental "linearizing" assumptions of linear elasticity are: infinitesimal strains or "small" deformations (or strains) and linear relationships between the components of stress and strain. In addition linear elasticity is valid only for stress states that do not produce yielding.
Radio waveRadio waves are a type of electromagnetic radiation with the longest wavelengths in the electromagnetic spectrum, typically with frequencies of 300 gigahertz (GHz) and below. At 300 GHz, the corresponding wavelength is 1mm, which is shorter than the diameter of a grain of rice. At 30 Hz the corresponding wavelength is ~, which is longer than the radius of the Earth. Wavelength of a radio wave is inversely proportional to its frequency, because its velocity is constant.
Poisson's ratioIn materials science and solid mechanics, Poisson's ratio (nu) is a measure of the Poisson effect, the deformation (expansion or contraction) of a material in directions perpendicular to the specific direction of loading. The value of Poisson's ratio is the negative of the ratio of transverse strain to axial strain. For small values of these changes, is the amount of transversal elongation divided by the amount of axial compression. Most materials have Poisson's ratio values ranging between 0.0 and 0.5.
Surface waveIn physics, 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 liquids, such as ocean waves. Gravity waves can also occur within liquids, at the interface between two fluids with different densities. Elastic surface waves can travel along the surface of solids, such as Rayleigh or Love waves. Electromagnetic waves can also propagate as "surface waves" in that they can be guided along with a refractive index gradient or along an interface between two media having different dielectric constants.
Martin (name)Martin may either be a given name or surname. In Scotland, Martin or McMartin is a common surname of Scottish Gaelic origin. Martin is, however, more common as a masculine given name in many languages and cultures. It comes from the Latin name Martinus, which is a late derived form of the name of the Roman god Mars, protective godhead of the Latins and, therefore, god of war. The meaning is usually rendered in reference to the god as "of Mars", or "of war/warlike" ("martial").
Martín FierroMartín Fierro, also known as El Gaucho Martín Fierro, is a 2,316-line epic poem by the Argentine writer José Hernández. The poem was originally published in two parts, El Gaucho Martín Fierro (1872) and La Vuelta de Martín Fierro (1879). The poem supplied a historical link to the gauchos' contribution to the national development of Argentina, for the gaucho had played a major role in Argentina's independence from Spain.
Paul MartinPaul Edgar Philippe Martin (born August 28, 1938), also known as Paul Martin Jr., is a Canadian lawyer and politician who served as the 21st prime minister of Canada and the leader of the Liberal Party of Canada from 2003 to 2006. The son of former secretary of state for external affairs Paul Martin Sr., Martin was a lawyer from Ontario before he became president and the chief executive officer of Canada Steamship Lines in 1973. He held that position until his election as a member of Parliament for the Montreal riding of LaSalle—Émard in 1988.
Collectivity of Saint MartinThe Collectivity of Saint Martin (Collectivité de Saint-Martin), commonly known as simply Saint Martin (Saint-Martin, sɛ̃ maʁtɛ̃), is an overseas collectivity of France in the West Indies in the Caribbean, on the northern half of the island of Saint Martin, as well as some smaller adjacent islands. Saint Martin is separated from the island of Anguilla by the Anguilla Channel. Its capital is Marigot. With a population of 32,489 as of January 2019 on an area of , it encompasses the northern 60% of the divided island of Saint Martin, and some neighbouring islets, the largest of which is Île Tintamarre.
Aston MartinAston Martin Lagonda Global Holdings PLC is a British manufacturer of luxury sports cars and grand tourers. Its predecessor was founded in 1913 by Lionel Martin and Robert Bamford. Steered from 1947 by David Brown, it became associated with expensive grand touring cars in the 1950s and 1960s, and with the fictional character James Bond following his use of a DB5 model in the 1964 film Goldfinger. Their sports cars are regarded as a British cultural icon.
