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Black-headed gulls, bar-tailed godwits and sanderlings foraging on a beach. A mixed-species feeding flock, also termed a mixed-species foraging flock, mixed hunting party or informally bird wave, is a flock of usually insectivorous birds of different species that join each other and move together while foraging. [1]
Đồng Văn District consists of two townships, Đồng Văn and Phố Bảng, and the communes of Hố Quáng Phìn, Lũng Cú, Lũng Phìn, Lũng Táo, Lũng Thầu, Má Lé, Phố Cáo, Phố Là, Sà Phìn, Sảng Tủng, Sính Lủng, Sủng Là, Sủng Trái, Tả Lủng, Tả Phìn, Thài Phìn Tủng and Vần Chải.
The song thất lục bát (雙七六八, literally "double seven, six eight") is a Vietnamese poetic form, which consists of a quatrain comprising a couplet of two seven-syllable lines followed by a Lục bát couplet (a six-syllable line and an eight-syllable line).
Ammonium perchlorate composite propellant (APCP) is a solid rocket propellant.It differs from many traditional solid rocket propellants such as black powder or zinc-sulfur, not only in chemical composition and overall performance but also by being cast into shape, as opposed to powder pressing as with black powder.
A modern self-contained HPLC Schematic representation of an HPLC unit (1) solvent reservoirs, (2) solvent degasser, (3) gradient valve, (4) mixing vessel for delivery of the mobile phase, (5) high-pressure pump, (6) switching valve in "inject position", (6') switching valve in "load position", (7) sample injection loop, (8) pre-column (guard column), (9) analytical column, (10) detector (i.e ...
A typical finite-dimensional mixture model is a hierarchical model consisting of the following components: . N random variables that are observed, each distributed according to a mixture of K components, with the components belonging to the same parametric family of distributions (e.g., all normal, all Zipfian, etc.) but with different parameters
Bánh cáy is a variety of Vietnamese bánh (translates loosely as "cake" or "bread") made in the Thái Bình Province of northern Vietnam.It is made of sticky rice, sugar, gac or gardenia, sesame, carrots, mandarin orange peel, and lard.
Trần Quốc Hoàn (23 January 1916 – 5 September 1986) was the first and longest-serving Minister of Public Security of North Vietnam.He served in that role from 1952 through unification to 1981.