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 .
FTDNA is the only good option for Y-DNA testing (I recommend testing at least 37 markers) and mtDNA (full sequence is best if you can afford it). FTDNA also guarantees storage of the unused DNA, making it an excellent choice for elderly relatives whose DNA you may want to test further down the road.