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The flip-disc display (or flip-dot display) is an electromechanical dot matrix display technology used for large outdoor signs, normally those that will be exposed to direct sunlight. Flip-disc technology has been used for external destination signs on buses and trains across North America , Europe and Australia , as well as for variable ...
The signs became so common throughout the area that they were near-icons of Southern California motoring. Their popularity led to Magnetic Signal wigwags appearing at railroad crossings across the United States—including on Alaska's Copper River and Northwestern Railway [ 1 ] and on several Hawaiian railroads—and across Canada, Mexico, and ...
For situations where more than one message needs to be communicated [a], ISO 3864 also provides guidance for "multiple signs", which consist of two or more symbol and text messages combined into a single sign. Additionally, fire protection and safe condition signs, which mark the location of equipment or exits can be combined with an arrow to ...
Magnetic moment, magnetic dipole moment: m, μ B, Π: Two definitions are possible: using pole strengths, = using currents: = ^ a = pole separation N is the number of turns of conductor A m 2 [I][L] 2: Magnetization: M
Are you one of the most mysterious, enigmatic star signs?
In electromagnetism, the magnetic susceptibility (from Latin susceptibilis 'receptive'; denoted χ, chi) is a measure of how much a material will become magnetized in an applied magnetic field. It is the ratio of magnetization M ( magnetic moment per unit volume ) to the applied magnetic field intensity H .
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