sign convention


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sign convention

[′sīn kən‚ven·chən]
(optics)
A convention as to which quantities, such as angles, distances, and radii of curvature, are positive and which are negative in computations involving a lens or a mirror.
References in periodicals archive ?
1881 Britain persuades Turkey to sign convention with Greece.
The cabinet accorded approval to sign Convention for the Avoidance of Double Taxation and the Prevention of Fiscal Evasion with respect to Taxes on Income between Pakistan and the Republic of Bulgaria.
Despite accepting and sign convention, some nations avoid because of lack of motivation and financial difficulties doing their duties.
A node and its sign convention can be seen in Figure 4.
"We are making every possible effort to bring back Dr Aafia Siddiqui and we are trying to sign convention on prisoners swap with US for this purpose, he underscored.
A means of getting rid of the most misleading sign convention of geometrical optics has been offered in Bhattacharjee (2002, 2012).
For the second edition, he has changed the sign convention for Gaussian optics to the Cartesian sign convention, as used in advanced books, and made other changes.
(NOTEREF _Ref194065771 \h \* MERGEFORMAT) Though many of the traffic signs prescribed by the Road Sign Convention are symbolic, thereby transcending the language barriers of international travel, illiterate individuals with little education may still have difficulty understanding the many varied and intricate road signs and traffic patterns.
Changing the traditional sign convention in thermodynamics can eliminate confusion and erroneous results
Hafez Abo Saada, member of the National Council for Human Rights (NCHR), commented to Daily News Egypt about the state's action in this regard, saying that NCHR is attempting to sign conventions for protecting people from enforced disappearances.
It details the nature of optical imaging and the coordinate systems and sign conventions; the optomechanical influence functions; the optomechanical constraint equations that control the position, orientation, and size of the images of simple and complex optical systems; other optical elements that can be incorporated into the optomechanical constraint equations, such as the flat-fold mirror, powered mirror, window, diffraction grafting, and prism; computational methods; analysis performed using the equations; and their application to an optical image correlator, a fiber optic spread-spectrum encoder, and an infrared imager.
The petition launched by the Kesri Lehar campaign urged the UK Government to press the Indian government to sign conventions which would abolish the death penalty in India.