Beta-plus (Î² +) radiation is the emission of positrons, which are the antimatter form of electrons. When a positron slows to speeds similar to those of electrons in the material, the positron will annihilate an electron, releasing two gamma photons of 511 keV in the process.
The Congressional Budget Office puts the cut-off lower, at $347,000 in 2007, or $252,000 after subtracting federal taxes and adding back transfers. Measured by net worth, rather than income, the top 1% started at $6.9m in 2009, according to the Federal Reserve, down 23% from 2007.
Salary. According to the U.S. Bureau of Labor Statistics (BLS) as of May 2010, computer and information systems managers earned an average of $115,780 a year. The top 10 percent earned more than $166,400 while the bottom 10 percent earned less than $71,420.he BLS found that the average yearly income for those working in finance and insurance was $118,010 in May 2010. IT professionals who work in manufacturing, government or health care earned, on average, $117,050, $110,030 and $101,840, respectively.