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  2. Inverted river delta - Wikipedia

    en.wikipedia.org/wiki/Inverted_river_delta

    An inverted river delta exists behind this strait. The Tagus River City of Lisbon and Tagus river delta as seen from space. Another example is the delta of the Tagus river in Portugal, although due to sedimentation this delta is now only very partially inverted, with the valley now mostly filled with sediment. It is still about 15 km wide and ...

  3. 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 ...

  4. Alpha Delta Theta (social) - Wikipedia

    en.wikipedia.org/wiki/Alpha_Delta_Theta_(social)

    Chapters. 25 originally. 13 at merger with ΦΜ. Merged. Phi Mu (1939) Website. Phi Mu Homepage. Alpha Delta Theta ( ΑΔΘ) was a national collegiate sorority operating in the United States from 1919 to 1939. The sorority officially affiliated with Phi Mu fraternity on August 30, 1939.

  5. Fly River - Wikipedia

    en.wikipedia.org/wiki/Fly_River

    Delta The original survey map created by L.M. D'Albertis in 1876. The delta of the Fly River is over 100 km wide at its entrance, but only 11 km wide at the apex upstream of Kiwai Island. The delta contains 3 main distributary channels (the Southern, Northern, and Far Northern Entrances) that branch from a common point (the “apex”).

  6. Delta Flight Museum - Wikipedia

    en.wikipedia.org/wiki/Delta_Flight_Museum

    Delta Ship 41 is by far one of the most faithfully restored passenger transport DC-3s in the world, evidenced by the fact that in 2001, it was the first aircraft to be presented with an award from the National Trust for Historic Preservation. Delta Ship 41 is the only remaining Delta passenger Douglas DC-3 left in existence.

  7. Ohanaeze Ndigbo - Wikipedia

    en.wikipedia.org/wiki/Ohanaeze_Ndigbo

    Ohanaeze Ndigbo // ⓘ is an Igbo socio-cultural organization in Nigeria. The group aims to represent the interests of all Igbo communities within and outside Nigeria. Although the group is not a political party, one of its main objectives is to foster unity among its members in order to more effectively represent the political interests of ...

  8. Abyss & Apex Magazine - Wikipedia

    en.wikipedia.org/wiki/Abyss_&_Apex_Magazine

    Abyss & Apex has therefore published a rather broad range of subgenres of both science fiction and fantasy, everything from hypertext science fiction to YA fantasy. Past and present editors. Abyss & Apex was founded by Carol Burrell, and published by Burrell under the ByrenLee Press imprint, Riverdale, New York. Elizabeth Bear was managing ...

  9. δ15N - Wikipedia

    en.wikipedia.org/wiki/Δ15N

    δ. 15. N. In geochemistry, hydrology, paleoclimatology and paleoceanography, δ15N (pronounced "delta fifteen n") or delta-N-15 is a measure of the ratio of the two stable isotopes of nitrogen, 15 N: 14 N. [1]