The classical example of thermionic emission is the emission of electrons from a hot cathode into a vacuum (also known as thermal electron emission or the Edison effect) in a vacuum tube. The hot cathode can be a metal filament, a coated metal filament, or a separate structure of metal or carbides or borides of transition metals.
Low confidence regions are areas for which there s a small amount of DNA evidence found in your sample. All ethnicities with predicted percentages of less than 4.5% appear as low confidence regions. Inferior complex is low complex .
A low white blood cell count can be related to a number of causes, including viral infections, cancer and diminished immune system function, according to MayoClinic. Detailed blood screening is the first step necessary to determine the specific cause. A low white blood cell count is called leukopenia. Leukopenia is best defined as a decrease in the number of white blood cells, called leukocytes, in the blood. The test that determines blood cell count is the white blood cell (WBC) test, which is often included as one part of the complete blood count (CBC) test.