Census Bureau Reports 64 Percent Increase in Number of Children Living with a Grandparent Over Last Two Decades. In 2009, 7.8 million children lived with at least one grandparent, a 64 percent increase since 1991 when 4.7 million children lived with a grandparent, according to a new report from the U.S. Census Bureau.
Epsilon (uppercase Îµ, lowercase Îµ or lunate Ïµ; Greek: Î­ÏÎ¹Î»Î¿Î½) is the fifth letter of the Greek alphabet, corresponding phonetically to a mid front unrounded vowel /e/. In the system of Greek numerals it has the value five. It was derived from the Phoenician letter He .
The E in Delta E comes from the German word Empfindung, meaning feeling, sensation. Delta comes from the Greek language, and is used in mathematics (as the symbol Î) to signify an incremental change in a variable, i.e., a difference. So, Delta E comes to mean a difference in sensation. A Delta E of 1 between two colors that are not touching one another is is generally considered to be barely perceptible by the average human observer; a Delta E between 3 and 6 is typically ...