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As early as 2005, the National Highway Traffic Safety Administration had received complaints concerning erratic speedometer and gauge readings from numerous makes and models of GM vehicles. [1] No deaths or injuries were ever attributed to the erratic gauges, but owners of the vehicles felt the problem was a safety concern.
A group of tell-tales showing lights for "brake fluid", "stop lamp" and "check engine" Graphical tell-talesA tell-tale, sometimes called an idiot light [1] or warning light, is an indicator of malfunction or operation of a system, indicated by a binary (on/off) illuminated light, symbol or text legend.
A particular choice of the scalar and vector potentials is a gauge (more precisely, gauge potential) and a scalar function ψ used to change the gauge is called a gauge function. [citation needed] The existence of arbitrary numbers of gauge functions ψ(r, t) corresponds to the U(1) gauge freedom of this theory. Gauge fixing can be done in many ...
A break of gauge exists between Argentina and Brazil, 1,435 mm (4 ft 8 + 1 ⁄ 2 in) to 1,000 mm (3 ft 3 + 3 ⁄ 8 in). A break of gauge exists between Uruguay and Brazil, 1,435 mm (4 ft 8 + 1 ⁄ 2 in) to 1,000 mm (3 ft 3 + 3 ⁄ 8 in) at Santana do Livramento. A train on 1435 mm standard-gauge track leaving Russia.
In electromagnetism, the Lorenz gauge condition or Lorenz gauge (after Ludvig Lorenz) is a partial gauge fixing of the electromagnetic vector potential by requiring = The name is frequently confused with Hendrik Lorentz , who has given his name to many concepts in this field. [ 1 ] (
The gauge-invariant perturbation theory is based on developments by Bardeen (1980), [7] Kodama and Sasaki (1984) [8] building on the work of Lifshitz (1946). [9] This is the standard approach to perturbation theory of general relativity for cosmology. [10]
This is very important in the Standard Model because left and right chirality components are treated differently by the gauge interactions. In particular, under weak isospin SU(2) transformations the left-handed particles are weak-isospin doublets, whereas the right-handed are singlets – i.e. the weak isospin of ψ R is zero.
A "gauge fixing" is needed, i.e. we need to impose 4 (arbitrary) constraints on the coordinate system in order to obtain unequivocal results. These constraints are known as coordinate conditions. A popular choice of gauge is the so-called "De Donder gauge", also known as the harmonic condition or harmonic gauge
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