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  2. Delta Air Lines - Wikipedia

    en.wikipedia.org/wiki/Delta_Air_Lines

    Delta Air Lines is one of the major airlines of the United States and a legacy carrier headquartered in Atlanta, Georgia. The United States' oldest operating airline and the seventh-oldest operating worldwide, Delta along with its subsidiaries and regional affiliates, including Delta Connection, operates over 5,400 flights daily and serves 325 destinations in 52 countries on six continents.

  3. SkyMiles - Wikipedia

    en.wikipedia.org/wiki/SkyMiles

    SkyMiles is the frequent-flyer program of Delta Air Lines that offers points (or "miles") to passengers traveling on most fare types, as well as to consumers who utilize Delta co-branded credit cards, which accumulate towards free awards such as airline tickets, business and first-class upgrades, and luxury products. [1]

  4. Logarithmic mean temperature difference - Wikipedia

    en.wikipedia.org/wiki/Logarithmic_mean...

    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 ...

  5. Dirac delta function - Wikipedia

    en.wikipedia.org/wiki/Dirac_delta_function

    t. e. In mathematical analysis, the Dirac delta function (or δ distribution ), also known as the unit impulse, [1] is a generalized function on the real numbers, whose value is zero everywhere except at zero, and whose integral over the entire real line is equal to one. [2] [3] [4] Since there is no function having this property, modelling the ...

  6. Delta (situational awareness system) - Wikipedia

    en.wikipedia.org/wiki/Delta_(situational...

    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 ...

  7. Delta County, Texas - Wikipedia

    en.wikipedia.org/wiki/Delta_County,_Texas

    www .deltacountytx .com. Delta County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 5,230. [1] Its county seat and largest city is Cooper. [2] The county was founded in 1870 and is named for its triangular shape, [3] which resembles the Greek letter delta . Meanders of two forks of the Sulphur River ...

  8. Delta Reservoir - Wikipedia

    en.wikipedia.org/wiki/Delta_Reservoir

    Delta Reservoir, also known as Delta Lake, is a reservoir located in Oneida County, New York, United States. [2] It was formed by the impoundment of the Mohawk River. Most of the lake is within the southwest part of the Town of Western, north of Rome. The western part of the lake is in the Town of Lee .

  9. ΔT - Wikipedia

    en.wikipedia.org/wiki/ΔT

    The symbols Δt and ΔT (spoken as "delta T") are commonly used in a variety of contexts. Time. ΔT (timekeeping) the difference between two time scales, Universal Time and Terrestrial Time, which results from a drift in the length of a day; The interval of time used in determining velocity; The increment between successive nerve impulses