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 .
Y & Mitochondrial are totally useless in giving a person an overall view of their ancestry. Understand that Y & Mitochondrial testing is very exact but represent a tiny part of your total ancestry. Most of your DNA is Autosomal. It is what is used in the overall ancestral testing. However Autosomal does not come down in a straight line unchanged. There are no Haplogroups with Autosomal.