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Sostoyanie Armyanskoy tserkvi v gody stalinskoy diktatury. Repressii armyanskikh svyashchennosluzhiteley. Uchastie Armyanskoy tserkvi v protivostoyanii sovetskoy vlasti Armenii. Pomoshch sv. Echmiadzina v sozdanii tankovoy kolonny David Sasunskiy i uchastie ego v gody Vtoroy mirovoy voyny protiv fashistskoy Germanii. Deyatelnost sv. Echmiadzina v poslevoennye gody.Repatriatsiya armyan v Sovetskuyu Armeniyu v 1940-50kh. gg. i uchastie armyanskogo dukhovenstva v etom protsesse.

A presentation of the state of the art in a theory of oscillatory and wave phenomena in hydrodynamical flows. It uses a unified approach for waves of different physical origins. A characteristic feature of this approach is that hydrodynamical phenomena are considered in terms of physics - that is, the complement of the conventionally employed formal mathematical approach. Some physical concepts such as wave energy and momentum in a moving fluid are analyzed, taking into account induced mean flow. The physical mechanisms responsible for hydrodynamic instability of shear flows are considered...