Wyoming SeminaryWyoming Seminary, founded in 1844, is a Methodist college preparatory school located in the Wyoming Valley of Northeastern Pennsylvania. The "Lower School," which consists of preschool - 8th-grade students, is located in Forty Fort. The "Upper School," comprising 9th-grade to postgraduate students, is located in Kingston. It is near the Susquehanna River and the city of Wilkes-Barre. Locally and in some publications, it is sometimes referred to as "Sem." As a boarding school, only Upper School students may board on campus.
Definite quadratic formIn mathematics, a definite quadratic form is a quadratic form over some real vector space V that has the same sign (always positive or always negative) for every non-zero vector of V. According to that sign, the quadratic form is called positive-definite or negative-definite. A semidefinite (or semi-definite) quadratic form is defined in much the same way, except that "always positive" and "always negative" are replaced by "never negative" and "never positive", respectively.
Tangent bundleIn differential geometry, the tangent bundle of a differentiable manifold is a manifold which assembles all the tangent vectors in . As a set, it is given by the disjoint union of the tangent spaces of . That is, where denotes the tangent space to at the point . So, an element of can be thought of as a pair , where is a point in and is a tangent vector to at . There is a natural projection defined by . This projection maps each element of the tangent space to the single point .
Marder (infantry fighting vehicle)The Schützenpanzer Marder 1 (ˈʃʏt͜sn̩ˌpant͜sɐ ˈmaʁdɐ ˈaɪ̯ns; "Schützen" carrying "Armour"-ed fighting vehicle "Marten 1") is a tracked German infantry fighting vehicle designed for use with the West German Panzergrenadiere units, mechanized infantry specialized for IFV combat. It has been operated by the German Army as the main Panzergrenadiere IFV from 1970s through to the present day. Developed as part of the rebuilding of West Germany's armoured fighting vehicle industry, the Marder has proven to be a successful and solid infantry fighting vehicle design.
Landless Workers' MovementLandless Workers' Movement (Movimento dos Trabalhadores Rurais Sem Terra, MST) is a social movement in Brazil, inspired by Marxism, generally regarded as one of the largest in Latin America, with an estimated informal membership of 1.5 million across 23 of Brazil's 26 states. MST defines its goals as access to the land for poor workers through land reform in Brazil, and activism around social issues that make land ownership more difficult to achieve, such as unequal income distribution, racism, sexism, and media monopolies.
PaintPaint is a liquid pigment that, after application to a solid material, and allowed to dry, adds a film-like layer to protect, add color, or provide texture. Paint can be made in many colors—and in many different types. Most paints are either oil-based or water-based, and each has distinct characteristics. For one, it is illegal in most municipalities to discard oil-based paint down household drains or sewers. Clean-up solvents are also different for water-based paint than oil-based paint.
Convex functionIn mathematics, a real-valued function is called convex if the line segment between any two distinct points on the graph of the function lies above the graph between the two points. Equivalently, a function is convex if its epigraph (the set of points on or above the graph of the function) is a convex set. A twice-differentiable function of a single variable is convex if and only if its second derivative is nonnegative on its entire domain.
Inverse trigonometric functionsIn mathematics, the inverse trigonometric functions (occasionally also called arcus functions, antitrigonometric functions or cyclometric functions) are the inverse functions of the trigonometric functions (with suitably restricted domains). Specifically, they are the inverses of the sine, cosine, tangent, cotangent, secant, and cosecant functions, and are used to obtain an angle from any of the angle's trigonometric ratios. Inverse trigonometric functions are widely used in engineering, navigation, physics, and geometry.
Linear subspaceIn mathematics, and more specifically in linear algebra, a linear subspace or vector subspace is a vector space that is a subset of some larger vector space. A linear subspace is usually simply called a subspace when the context serves to distinguish it from other types of subspaces. If V is a vector space over a field K and if W is a subset of V, then W is a linear subspace of V if under the operations of V, W is a vector space over K.
Emmanuel GdoutosEmmanuel E. Gdoutos (Greek: Εμμανουήλ Ε. Γδούτος, born June 2, 1948) is a Greek academic, Professor Emeritus at the Democritus University of Thrace and Full Member of the Academy of Athens. He has worked in experimental mechanics, fracture mechanics, composite materials, and sandwich structures. His main scientific accomplishments include the solution of many problems of crack growth under combination of opening-mode and sliding-mode loading which were published in his book: “Problems of Mixed-Mode Crack Propagation.
Tucuruí DamThe Tucuruí Dam (Tucuruí means "grasshopper's water", translated from Tupí language; Tucuruí) is a concrete gravity dam on the Tocantins River located on the Tucuruí County in the State of Pará, Brazil. The main purpose of the dam is hydroelectric power production and navigation. It is the first large-scale hydroelectric project in the Brazilian Amazon rainforest. The installed capacity of the 25-unit plant is . Phase I construction began in 1980 and ended in 1984 while Phase II began in 1998 and ended in 2010.
Linear mapIn mathematics, and more specifically in linear algebra, a linear map (also called a linear mapping, linear transformation, vector space homomorphism, or in some contexts linear function) is a mapping between two vector spaces that preserves the operations of vector addition and scalar multiplication. The same names and the same definition are also used for the more general case of modules over a ring; see Module homomorphism. If a linear map is a bijection then it is called a .
