The coumarin ring system in the title asymmetric alkyne, C18H12O2, is approximately planar (r.m.s. deviation of the 11 non-H atoms = 0.048 Å), and is inclined with respect to the methyl-benzene ring, forming a dihedral angle of 33.68 (4)°. In the crystal, supra-molecular zigzag chains along the c-axis direction are formed via weak C-H⋯O hydrogen bonds, and these are connected into double layers...

In the title compound, C22H27N2O2, the piperidine ring adopts a half-chair conformation with the benzene rings inclined in a trans orientation with respect to the piperidine ring [dihedral angle between the benzene rings = 89.1 (1)°]. In the crystal, a three-centre asymmetric N-H⋯O/C-H⋯O hydrogen-bonding inter-action leads to the formation of chains extending along the a-axis direction.

Numerical and analytical solutions of Stokes theory couple stress fluid under the effects constant, space, variable viscosity in inclined channel are discussed here. The considered is described mathematically with definition tensor. dimensional form boundary value problem transformed into dimensionless by defining quantities then solved help perturbation technique. expressions velocity temperat...

This paper separately evaluates the effects of inclination and asymmetry solar coronal loops on resonant absorption kink magnetohydrodynamic (MHD) oscillations. We modelled a typical loop by straight axisymmetric cylindrical magnetic flux tube filled with cold plasma. solved dispersion relation numerically for different values longitudinal mass density stratification. show that, in inclined asy...

This paper studies the optimal pricing strategy of a hotel that establishes an online distribution channel through cooperation with an online travel agency (OTA). The OTA promotes the hotel and sells hotel rooms through its website and receives commission from the hotel for rooms sold. Through a sequence game model, this paper derives the optimal decision on the unit commission of the hotel and...

We examine and compare four different joint-network-channel-codes (JNCC) and three reference systems for the multiple-access relay channel (MARC) with block Rayleigh fading channels for symmetric and asymmetric setups. Two of the JNCC’s were presented previously in the literature and the other two are novel approaches. The JNCC’s outperform the reference systems and achieve a diversity gain for...

Abstract: In this paper, we consider the unsteady hydromagnetic incompressible viscous fluid flow through a porous medium in a horizontal channel under prescribed discharge, under the influence of inclined magnetic field. The undisturbed flow is due to a constant pressure gradient and the unsteadiness in the flow is created by imposing a time – dependent flux condition. The solutions for the ve...

The title salt, 2C7H11N2 (+)·2C7H4NO4 (-)·3H2O, crystallized with two anions and two cations in the asymmetric unit, together with three water mol-ecules. Both 4-di-methyl-amino-pyridinium cations are protonated at their pyridine N atoms with the plane of the N(CH3)2 hetero atoms inclined to the pyridine ring by 4.5 (2) and 1.4 (2)°. In the 2-nitro-benzoate anions, the carboxyl and nitro groups...