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1. 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.
SSAA choir. In music, SSAA is an initialism referring to a choir composed of two distinct Soprano (S) sections and two distinct Alto (A) sections. In an SSAA choir, First Sopranos sing the highest musical line, followed by Second Sopranos, First Altos, and Second Altos on the lowest line. First sopranos typically have the melody, with second ...
Delta ( / ˈdɛltə /; [1] uppercase Δ, lowercase δ; Greek: δέλτα, délta, [ˈðelta]) [2] is the fourth letter of the Greek alphabet. In the system of Greek numerals it has a value of 4. It was derived from the Phoenician letter dalet 𐤃. [3] Letters that come from delta include Latin D and Cyrillic Д .
Lava delta. Lava deltas, similar to river deltas, form wherever sufficient sub-aerial flows of lava enter standing bodies of water. The lava cools and breaks up as it encounters the water, with the resulting fragments filling in the adjacent seabed topography such that the flow can move further offshore sub-aerially.
Truly. Delta Zeta ( ΔΖ, also known as DZ) is an international college sorority founded on October 24, 1902, at Miami University in Oxford, Ohio . Delta Zeta has 170 collegiate chapters in the United States and Canada, and over 200 alumnae chapters in Canada, the United Kingdom, and the United States. As of 2013, there are over 244,400 college ...
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 ...
Delta is a situational awareness [1] and battlefield management system developed and used in Ukraine. The system integrates information from a broad network of participants, including troops, civilian officials, and vetted bystanders; [2] and a wide range of streams, [1] including sensors, intelligence sources, surveillance satellites and ...
The logarithmic decrement is defined as the natural log of the ratio of the amplitudes of any two successive peaks: where x ( t) is the overshoot (amplitude - final value) at time t and x(t + nT) is the overshoot of the peak n periods away, where n is any integer number of successive, positive peaks. The damping ratio is then found from the ...