سامانه امتحانات مرکز آموزش و تحقیق خانه کارگر, آفتاب سامانه امتحانات مرکز آموزش و تحقیق خانه کارگر
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Optical Detector Definitions of Characteristics. 3dB Bandwidth. The frequency where the photodetector's output electrical power has dropped 3 dB from a lowfrequency reference. We specify the more conservative electrical 3 dB, rather than the larger optical 3 dB. (Optical 3 dB is equivalent to the electrical 6dB frequency.)
The discovery of erythropoietin (EPO) simplified blood doping in sports, but improved detection methods, for EPO has forced cheating athletes to return to blood transfusion. Autologous blood transfusion with cryopreserved red blood cells (RBCs) is the method of choice, because no valid method exists to accurately detect such event. In endurance sports, it can be estimated that elite athletes ...