angle de correction
31ASTRODYNAMIQUE — L’astrodynamique est la science qui s’attache à expliciter la dynamique des astres et des forces qui les font se mouvoir. Par extension, la dynamique des satellites artificiels lui est assimilée. On peut dès lors définir l’astrodynamique comme la …
32VISION — «Toute la conduite de notre vie dépend de nos sens, entre lesquels celui de la vue étant le plus universel et le plus noble. Il n’y a point de doute que les inventions qui servent à augmenter sa puissance ne soient des plus utiles qui puissent… …
33Mathematical discussion of rangekeeping — In naval gunnery, when long range guns became available, an enemy ship would move some distance after the shells were fired. It became necessary to figure out where the enemy ship, the target, was going to be when the shells arrived. The process… …
34microscope — /muy kreuh skohp /, n. 1. an optical instrument having a magnifying lens or a combination of lenses for inspecting objects too small to be seen or too small to be seen distinctly and in detail by the unaided eye. 2. (cap.) Astron. the… …
35eye disease — Introduction any of the diseases or disorders that affect the human eye (eye, human). This article briefly describes the more common diseases of the eye and its associated structures, the methods used in examination and diagnosis, and the… …
36photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …
37TOPOGRAPHIE — Étymologiquement, la topographie (du grec 精礼神礼﨟, «lieu») consiste à représenter graphiquement un lieu sur le papier; l’opération correspondante est le levé topographique et le support en est la minute de levé. Deux cas sont à envisager. Dans le… …
38Keystone effect — The Keystone effect is caused by attempting to project an image onto a surface at an angle, as with a projector not quite centered onto the screen it is projecting on. It is a distortion of the image dimensions, making it look like a trapezoid.… …
39HSL and HSV — Fig. 1. HSL (a–d) and HSV (e–h). Above (a, e): cut away 3D models of each. Below: two dimensional plots showing two of a model’s three parameters at once, holding the other constant: cylindrical shells (b, f) of constant saturation, in this case… …
40Magnetic declination — Example of magnetic declination showing a compass needle with a positive (or easterly ) variation from geographic north. Magnetic declination is the angle between magnetic north (the direction the north end of a compass needle points) and true… …
