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Doping of a pure silicon array. Silicon based intrinsic semiconductor becomes extrinsic when impurities such as boron and antimony are introduced.. In semiconductor production, doping is the intentional introduction of impurities into an intrinsic (undoped) semiconductor for the purpose of modulating its electrical, optical and structural properties.
Incidence of the use of performance-enhancing drugs ("doping") in football seems to be lower than in other sports. However, this could also be explained by the low amount of unannounced drug testing during training. There were also no further investigations or consequences in the Operación Puerto doping case or other revelations. [1]
Modulation doping is a technique for fabricating semiconductors such that the free charge carriers are spatially separated from the donors. Because this eliminates scattering from the donors, modulation-doped semiconductors have very high carrier mobilities .
The use of anabolic steroids and performance-enhancing drugs in American football is officially prohibited by virtually every sanctioning body. The National Football League (NFL) began to test players for steroid use during the 1987 season, and started to issue suspensions to players during the 1989 season. [ 1 ]
This process is known as doping, and the resulting semiconductors are known as doped or extrinsic semiconductors. Apart from doping, the conductivity of a semiconductor can be improved by increasing its temperature. This is contrary to the behavior of a metal, in which conductivity decreases with an increase in temperature. [4]
In cycling, mechanical doping is the use of a secret motor to propel the bicycle. It is banned by the Union Cycliste Internationale. One of the first allegations of mechanical doping was in the 2010 Tour of Flanders. The first, and so far only, confirmed use of mechanical doping was at the 2016 UCI Cyclo-cross World Championships. Bike ...
The NCAA will allow commercial sponsor advertisements on football fields for regular-season games in all three divisions beginning this season, creating a new revenue stream for schools facing ...
In semiconductor physics, the depletion region, also called depletion layer, depletion zone, junction region, space charge region, or space charge layer, is an insulating region within a conductive, doped semiconductor material where the mobile charge carriers have diffused away, or been forced away by an electric field.