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  2. Rotation of axes in two dimensions - Wikipedia

    en.wikipedia.org/wiki/Rotation_of_axes_in_two...

    In mathematics, a rotation of axes in two dimensions is a mapping from an xy-Cartesian coordinate system to an x′y′-Cartesian coordinate system in which the origin is kept fixed and the x′ and y′ axes are obtained by rotating the x and y axes counterclockwise through an angle .

  3. Rotation matrix - Wikipedia

    en.wikipedia.org/wiki/Rotation_matrix

    In 4-space n = 4, the four eigenvalues are of the form e ±iθ, e ±iφ. The null rotation has θ = φ = 0. The case of θ = 0, φ ≠ 0 is called a simple rotation, with two unit eigenvalues forming an axis plane, and a two-dimensional rotation orthogonal to the axis plane. Otherwise, there is no axis plane.

  4. Rotations in 4-dimensional Euclidean space - Wikipedia

    en.wikipedia.org/wiki/Rotations_in_4-dimensional...

    The trajectory of a point can be written as a function of time as {ξ 10 + ω 1 t, η 0, ξ 20 + ω 2 t} and stereographically projected onto its associated torus, as in the figures below. [8] In these figures, the initial point is taken to be {0, ⁠ π / 4 ⁠, 0}, i.e. on the Clifford torus. In Fig. 1, two simple rotation trajectories are ...

  5. CORDIC - Wikipedia

    en.wikipedia.org/wiki/CORDIC

    CORDIC (coordinate rotation digital computer), Volder's algorithm, Digit-by-digit method, Circular CORDIC (Jack E. Volder), [1] [2] Linear CORDIC, Hyperbolic CORDIC (John Stephen Walther), [3] [4] and Generalized Hyperbolic CORDIC (GH CORDIC) (Yuanyong Luo et al.), [5] [6] is a simple and efficient algorithm to calculate trigonometric functions, hyperbolic functions, square roots ...

  6. Electroglottographic wavegram - Wikipedia

    en.wikipedia.org/wiki/Electroglottographic_wavegram

    strips are rotated 90 degrees counter-clockwise; Glottal cycle duration is normalized by scaling the individual glottal cycle plots to the same height; the resulting graphs are combined to form the final display, the EGG wavegram. Wavegram data can be influenced by the anatomical baseline of the individual;

  7. Monica C. Lozano - Pay Pals - The Huffington Post

    data.huffingtonpost.com/paypals/monica-c-lozano

    The Monica C. Lozano Stock Index From January 2008 to December 2012, if you bought shares in companies when Monica C. Lozano joined the board, and sold them when she left, you would have a -17.7 percent return on your investment, compared to a -2.8 percent return from the S&P 500.

  8. California town prays for recovery of 2 kindergartners in ...

    www.aol.com/2-students-wounded-suspected-gunman...

    A Northern California community came together Friday night to pray for two little boys who underwent surgery and remain in critical condition after they were wounded in a shooting at a small ...

  9. Quaternions and spatial rotation - Wikipedia

    en.wikipedia.org/wiki/Quaternions_and_spatial...

    3D visualization of a sphere and a rotation about an Euler axis (^) by an angle of In 3-dimensional space, according to Euler's rotation theorem, any rotation or sequence of rotations of a rigid body or coordinate system about a fixed point is equivalent to a single rotation by a given angle about a fixed axis (called the Euler axis) that runs through the fixed point. [6]