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Adizov S.M.,Academy of Sciences of Uzbekistan | Ashurov J.,Academy of Sciences of Uzbekistan | Karimov Z.,Tashkent Institute of Irrigation and Melioration | Yuldashev P.K.,Academy of Sciences of Uzbekistan | Tashkhodjaev B.,Academy of Sciences of Uzbekistan
Acta Crystallographica Section E: Structure Reports Online | Year: 2013

The title compound, C19H20N2O·C2H5OH, is an ethanol solvate of an indol alkaloid which was extracted from the plant Vinca erecta. The fused piperidine ring adopts an approximate boat conformation and the pyrrolidine ring an envelope conformation with one of the methylene C atoms at the flap. An intramolecular N - H...O hydrogen bond forms an S6 ring motif. In the crystal, norfulorocurarine and ethanol molecules are linked into a chain along the c-axis direction through N - H...O and O - H...N hydrogen bonds. Source

Isakov A.Z.,Tashkent Institute of Irrigation and Melioration | Bugakov A.G.,Academy of Sciences of Uzbekistan
Applied Solar Energy (English translation of Geliotekhnika) | Year: 2014

Problems and aspects of the service management of power engineering and its significance for the operation of photovoltaic power plants are considered. © 2014, Allerton Press, Inc. Source

Abdikarimov R.A.,Tashkent Financial Institute | Khudayarov B.A.,Tashkent Institute of Irrigation and Melioration
International Applied Mechanics | Year: 2014

The dynamic stability of viscoelastic plates of variable stiffness is analyzed. The deflections are described by partial integro-differential equations of motion. The Bubnov–Galerkin method based on monomial and polynomial approximation of deflections is used to reduce the problem to ordinary integro-differential equations with time as an independent variable. These equations are solved numerically using a singular kernel. A numerical problem-solving algorithm based on this method is described. A number of new mechanical effects are revealed. © 2014, Springer Science+Business Media New York. Source

Khudayarov B.A.,Tashkent Institute of Irrigation and Melioration
International Applied Mechanics | Year: 2010

The flutter of a viscoelastic plate in a supersonic gas flow is studied. A technique and algorithm for numerical solution of nonlinear integro-differential equations with weakly singular kernels are elaborated. The critical flutter speed of viscoelastic plates is determined © 2010 Springer Science+Business Media, Inc. Source

Karimov A.,International Water Management Institute | Mavlonov A.,Institute of Hydrogeology and Engineering Geology | Miryusupov F.,Institute of Hydrogeology and Engineering Geology | Gracheva I.,Institute of Hydrogeology and Engineering Geology | And 2 more authors.
Water International | Year: 2012

Storing flow of the Syrdarya River in the aquifers of the upstream Fergana Valley in winter and recovery of this water in summer is examined as a solution for competing demands between upstream hydropower and downstream irrigation. Modelling of the Isfara and Sokh aquifers suggests the potential of reducing the Syrdarya River flow to the Fergana Valley downstream by 540 Mm 3 in winter and increasing it by 540 Mm 3 in summer. Implementing the proposed strategy in only these two aquifers would cover over 25% of the summer water deficit in the Syrdarya River downstream. © Copyright 2012 International Water Resources Association. Source

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