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The delta function was introduced by physicist Paul Dirac, and has since been applied routinely in physics and engineering to model point masses and instantaneous impulses. It is called the delta function because it is a continuous analogue of the Kronecker delta function, which is usually defined on a discrete domain and takes values 0 and 1.
Delta Sigma Theta Sorority, Inc. ( ΔΣΘ) is a historically African American sorority. The organization was founded by college-educated women dedicated to public service with an emphasis on programs that assist the African American community. Delta Sigma Theta was founded on January 13, 1913 by twenty-two women at Howard University in Washington, D.C. Membership is open to any woman ...
Delta ratio. Delta ratio, or " delta-delta ", is a formula that can be used to assess elevated anion gap metabolic acidosis and to evaluate whether a mixed acid–base disorder ( metabolic acidosis) is present. The anion gap (AG) without potassium is calculated first and if a metabolic acidosis is present, results in either a high anion gap ...
Delta Air Lines Flight 191 was a regularly scheduled Delta Air Lines domestic service from Fort Lauderdale, Florida, to Los Angeles with an intermediate stop at Dallas/Fort Worth International Airport (DFW). On August 2, 1985, the Lockheed L-1011 TriStar operating Flight 191 encountered a microburst while on approach to land at DFW. The aircraft impacted ground just over one mile (1.6 km ...
Inland deltas. Okavango Delta. In rare cases the river delta is located inside a large valley and is called an inverted river delta. Sometimes a river divides into multiple branches in an inland area, only to rejoin and continue to the sea. Such an area is called an inland delta, and often occurs on former lake beds.
The Mississippi Delta, also known as the Yazoo–Mississippi Delta, or simply the Delta, is the distinctive northwest section of the U.S. state of Mississippi (and portions of Arkansas and Louisiana) that lies between the Mississippi and Yazoo rivers. The region has been called "The Most Southern Place on Earth" [1] ("Southern" in the sense of ...
Logarithmic mean temperature difference. In thermal engineering, the logarithmic mean temperature difference ( LMTD) is used to determine the temperature driving force for heat transfer in flow systems, most notably in heat exchangers. The LMTD is a logarithmic average of the temperature difference between the hot and cold feeds at each end of ...
Delta Lea Goodrem AM (born 9 November 1984) is an Australian singer, songwriter, television personality and actress. Goodrem signed a recording contract with Sony Music at the age of 15.