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81Kneeboarding (towsport) — Kneeboarding is an aquatic sport where the participant is towed on a buoyant, convex, and hydrodynamically shaped board at a planing speed behind a motorboat. In the usual configuration of a tow sport kneeboard, riders sit on their heels on the… …
82Absolute time and space — See also: Absolute rotation, Bucket argument, Rotating spheres, and Inertial frame of reference Originally introduced by Sir Isaac Newton in the Philosophiæ Naturalis Principia Mathematica, the concepts of absolute time and space provided a… …
83108-form Wu family tai chi chuan — The different slow motion solo form training sequences of T ai Chi Ch uan are the best known manifestation of T ai Chi for the general public. In English, they are usually called the hand form or just the form ; in Mandarin it is usually called… …
84Revolutions per minute — (abbreviated rpm, RPM, r/min, or r·min−1) is a unit of frequency: the number of full rotations completed in one minute around a fixed axis. It is most commonly used as a measure of rotational speed or angular velocity of some mechanical component …
85N-dimensional space — In mathematics, an n dimensional space is a topological space whose dimension is n (where n is a fixed natural number). The archetypical example is n dimensional Euclidean space, which describes Euclidean geometry in n dimensions.Many familiar… …
86Mental rotation — is the ability to rotate mental representations of two dimensional and three dimensional objects. Contents 1 Introduction 2 How mental rotation ability is assessed …
87Jacobi eigenvalue algorithm — The Jacobi eigenvalue algorithm is a numerical procedure for the calculation of all eigenvalues and eigenvectors of a real symmetric matrix. Description Let varphi in mathbb{R}, , 1 le k < l le n and let J(varphi, k, l) denote the n imes n matrix …
88Crosstrack — Game box Players 2 4 Age range 8+ …
89Brushed DC electric motor — A brushed DC motor is an internally commutated electric motor designed to be run from a direct current power source. Contents 1 Simple two pole DC motor 2 The commutating plane 2.1 Compensation for stator field distortion …
90Emotiv Systems — is an Australian origin [ [http://emotiv.com/corporate/5 0/5 1.htm Contact ] ] electronics company developing brain computer interfaces based on electroencephalography (EEG) technology. Emotiv Systems was founded in 2003 by four scientists and… …
