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The sign of the weight of a tensor density, such as the weight of the determinant of the covariant metric tensor. The active and passive sign convention of current, voltage and power in electrical engineering. A sign convention used for curved mirrors assigns a positive focal length to concave mirrors and a negative focal length to convex mirrors.
Illustration of the "reference directions" of the current (), voltage (), and power () variables used in the passive sign convention.If positive current is defined as flowing into the device terminal which is defined to be positive voltage, then positive power (big arrow) given by the equation = represents electric power flowing into the device, and negative power represents power flowing out.
Many commercial offset printers have accepted the submission of press-ready PDF files as a print source, specifically the PDF/X-1a subset and variations of the same. [83] The submission of press-ready PDF files is a replacement for the problematic need for receiving collected native working files.
The cash flow sign convention is that money you pay out has a minus sign, while money you take in has a plus sign (or no sign). [1] Most financial calculators (and spreadsheets) follow the Cash Flow Sign Convention. This is simply a way of keeping the direction of the cash flow straight.
In addition, the problem with sign conventions in the exponential factor arises not only with electrodynamic waves but in all cases where one deals with Fourier transforms of real-valued waves, and the choice is that of whether positive-energy (=positive-frequency) waves turn clockwise or counterclockwise, I'm happy if someone puts this into a ...
Latitude is a number preceded by a sign character. A plus sign (+) denotes northern hemisphere or the equator, and a minus sign (-) denotes southern hemisphere. [d] The integer part of the number is a fixed length. The number of digits in that part indicates the units, thus leading zero(es) must be filled when necessary.