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Optical cage system in a vacuum chamber. An optical cage system is an optomechanical system that is used to mount optical elements such as lenses and mirrors together in a rigid assembly. Optical systems built this way can be more compact than can be achieved using an optical table, and the system provides more flexibility than an optical rail.
In 1754, Jean-Antoine Nollet published an account of the cage effect in his Leçons de physique expérimentale. [2]In 1755, Benjamin Franklin observed the effect by lowering an uncharged cork ball suspended on a silk thread through an opening in an electrically charged metal can.
Spherical cage containing watermelons in Russia. A cage is an enclosure often made of mesh, bars, or wires, used to confine, contain or protect something or someone.A cage can serve many purposes, including keeping an animal or person in captivity, capturing an animal or person, and displaying an animal at a zoo.
Battery cages are a housing system used by factory farms for various animal production methods, but primarily for egg-laying hens. The name arises from the arrangement of rows and columns of identical cages connected, in a unit, as in an artillery battery. Although the term is usually applied to poultry farming, similar cage systems are used ...
An IDF Caterpillar D9 armored bulldozer equipped with slat armor surrounding its driver's cab. Slat armor (or slat armour in British English), also known as bar armor, cage armor, and standoff armor, is a type of vehicle armor designed to protect against high-explosive anti-tank (HEAT) attacks, as used by anti-tank guided missiles (ATGMs) and rocket-propelled grenades (RPGs).
The CAGED system is an acronym for the chords C, A, G, E, and D. This acronym is shorthand for the use of barre chords that can be played anywhere on the fret board as described above. Some guitar instructors use it to teach students the open chords that can work as barre chords across the fret board.
It is also designed to allow maximum comfort of the animal and to provide a secure, chew proof environment. An external ventilation unit supplies the cages with fresh HEPA-filtered air which passes through the filter lids. The ventilation-system mostly consists of two tubes for ingoing and outgoing air.
Bureaucracies were distinct from the feudal system and patrimonialism where people were promoted on the basis of personal relationships. [6] In bureaucracies, there was a set of rules that are clearly defined and promotion through technical qualifications, seniority [7] and disciplinary control.