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 .
Family Tree DNA is the only company that stores your DNA for 25 years allowing you to order additional tests using the original sample. Family Tree DNA is the only company to offer the SNP Assurance Program: if no ancestral haplogroup can be estimated with 100% certainty, FTDNA will SNP test your sample for free.