09-28-2021-1848 - reflexion hyperplane

 In mathematics, a reflection (also spelled reflexion)^[1] is a mapping from a Euclidean space to itself that is an isometry with a hyperplane as a set of fixed points; this set is called the axis (in dimension 2) or plane (in dimension 3) of reflection. The image of a figure by a reflection is its mirror image in the axis or plane of reflection. For example the mirror image of the small Latin letter p for a reflection with respect to a vertical axis would look like q. Its image by reflection in a horizontal axis would look like b. A reflection is an involution: when applied twice in succession, every point returns to its original location, and every geometrical object is restored to its original state.

https://en.wikipedia.org/wiki/Reflection_(mathematics)

design principles

https://en.wikipedia.org/wiki/Scaling_(geometry)

https://en.wikipedia.org/wiki/Reflection_(mathematics)

https://en.wikipedia.org/wiki/Norm_(mathematics)#Zero_norm

https://en.wikipedia.org/wiki/Uncorrelatedness_(probability_theory)

https://en.wikipedia.org/wiki/Quaternions_and_spatial_rotation#Quaternion-derived_rotation_matrix

https://en.wikipedia.org/wiki/Reflection_symmetry

https://en.wikipedia.org/wiki/Graphite-moderated_reactor

Monday, September 27, 2021

09-26-2021-2252 - Particle Radiation Range, Energy Density Tables, Gravimetry

Monday, September 27, 2021

09-26-2021-2113 - Corona Discharge electrical breakdown conductive leak charge into air, corona ring, ion wind, Hall effect thruster, Magnetohydrodynamic drive, Field-emission electric propulsion, plasma, Air ioniser, ion thruster, plasma actuator, AC, etc..