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An EPC RFID tag used by Wal-Mart.. The Electronic Product Code (EPC) is designed as a universal identifier (using an idiosyncratic numerical code for each different commodity [1]) that provides a unique identity for every physical object anywhere in the world, for all time.
The definition of the AQI in a particular nation reflects the discourse surrounding the development of national air quality standards in that nation. [13] A website allowing government agencies anywhere in the world to submit their real-time air monitoring data for display using a common definition of the air quality index has recently become ...
The Hartman Personality Profile is based on the notion that all people possess one of four driving "core motives". [3] The Color Code is based on four types of personality, identified by color: Red, (motivated by power); Blue, (motivated by intimacy); White, (motivated by peace); and Yellow, (motivated by fun). [4]
Mixing red, green, and blue sources to produce white light needs electronic circuits to control the blending of the colors. Since LEDs have slightly different emission patterns, the color balance may change depending on the angle of view, even if the RGB sources are in a single package, so RGB diodes are seldom used to produce white lighting.
The Hall effect is the production of a potential difference (the Hall voltage) across an electrical conductor that is transverse to an electric current in the conductor and to an applied magnetic field perpendicular to the current.
The angle α, is the angle between the two edges connecting the vertex d to the vertices b and c. The angle β , does so for the vertices a and c , while γ , is defined by the position of the vertices a and b .
Color (American English) or colour (British and Commonwealth English) is the visual perception based on the electromagnetic spectrum. Though color is not an inherent property of matter, color perception is related to an object's light absorption, reflection, emission spectra, and interference.
A flat coating does not directly increase the size of the light cone in the semiconductor; it provides an intermediate wider cone angle in the coating, but the critical angle between rays in the semiconductor and in the air beyond the coating does not change. With a curved coating or encapsulation, however, efficiency can be further increased.