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  2. Frame of reference - Wikipedia

    en.wikipedia.org/wiki/Frame_of_reference

    In particle physics experiments, it is often useful to transform energies and momenta of particles from the lab frame where they are measured, to the center of momentum frame "COM frame" in which calculations are sometimes simplified, since potentially all kinetic energy still present in the COM frame may be used for making new particles.

  3. Vector field - Wikipedia

    en.wikipedia.org/wiki/Vector_field

    A map from this sphere to a unit sphere of dimension n − 1 can be constructed by dividing each vector on this sphere by its length to form a unit length vector, which is a point on the unit sphere S n−1. This defines a continuous map from S to S n−1. The index of the vector field at the point is the degree of this map. It can be shown ...

  4. Harvard Laboratory for Computer Graphics and Spatial Analysis

    en.wikipedia.org/wiki/Harvard_Laboratory_for...

    The Laboratory's Odyssey project created a geographic information system that served as a milestone in the development of integrated mapping systems. [2] The Laboratory influenced numerous computer graphic, mapping and architectural systems such as Intergraph , Computervision , and Esri .

  5. Field line - Wikipedia

    en.wikipedia.org/wiki/Field_line

    A vector field defines a direction and magnitude at each point in space. A field line is an integral curve for that vector field and may be constructed by starting at a point and tracing a line through space that follows the direction of the vector field, by making the field line tangent to the field vector at each point.

  6. Momentum mapping format - Wikipedia

    en.wikipedia.org/wiki/Momentum_mapping_format

    Material point method discrete format. Momentum mapping format is a key technique in the Material Point Method (MPM) for transferring physical quantities such as momentum, mass, and stress between a material point and a background grid. [1] The Material Point Method (MPM) is a numerical technique using a mixed Eulerian-Lagrangian description ...

  7. Logistic map - Wikipedia

    en.wikipedia.org/wiki/Logistic_map

    The reason that the dyadic transformation is also called the bit-shift map is that when y is written in binary notation, the map moves the binary point one place to the right (and if the bit to the left of the binary point has become a "1", this "1" is changed to a "0"). A cycle of length 3, for example, occurs if an iterate has a 3-bit ...

  8. Local reference frame - Wikipedia

    en.wikipedia.org/wiki/Local_reference_frame

    In theoretical physics, a local reference frame (local frame) refers to a coordinate system or frame of reference that is only expected to function over a small region or a restricted region of space or spacetime. The term is most often used in the context of the application of local inertial frames to small regions of a gravitational field.

  9. World line - Wikipedia

    en.wikipedia.org/wiki/World_line

    Each point of a world line is an event that can be labeled with the time and the spatial position of the object at that time. For example, the orbit of the Earth in space is approximately a circle, a three-dimensional (closed) curve in space: the Earth returns every year to the same point in space relative to the sun. However, it arrives there ...