The effects of using both directions and directional subdividing on adaptive gridembedding on the computational time and the number of grid points required for the same accuracy are considered. Directional subdividing is used from the beginning of the adaptation procedure without any restriction. To avoid the complication of unstructured grid, the semi-structured grid was used. It is used to so...

Reaching an electricity system which is both economically efficient and environmentally friendly is motivating countries to design and execute different types of TOU demand response programs. But there are certain deficiencies which prevent these programs to effectively modify the load shape. Smart grid as a means could help the electricity system to reach the highest demand side management ...

Among the adaptive-grid methods, redistribution and embedding techniques have been the focus of more attention by researchers. Simultaneous or combined adaptive techniques have also been used. This paper describes a combination of adaptive-grid embedding and redistribution methods on semi-structured grids for two-dimensional invisid flows. Since the grid is semi-structured, it is possible to us...

Grid computing environments include heterogeneous resources shared by a large number of computers to handle the data and process intensive applications. In these environments, the required resources must be accessible for Grid applications on demand, which makes the resource discovery as a critical service. In recent years, various techniques are proposed to index and discover the Grid resource...

We present a new time-dependent approach for probing the dynamics and high-resolution spectroscopy of Rydberg systems in the presence of external fields. The procedure is based on the extension of a recent development of a generalized pseudospectral time-dependent method which allows for non-uniform spatial grid discretization, and long-time propagation of the time-dependent Schrodinger equatio...

The effect of hydrostatic pressure on the incommensurate antiferromagnetic structure of CeRhIn5 is investigated with neutron diffraction using a He pressure cell. At 3.8 kbar, the staggered magnetic moment is 0.37(4) μB per Ce at 1.6 K, which is the same as the ambient-pressure value. The Néel temperature TN = 3.8(1) K is also the same as the ambient-pressure one, although the curve of order pa...

We have performed simulations of driven, supersonic, magnetohydrodynamic turbulence following the growth and saturation of an initially weak magnetic field via small-scale dynamo amplification. The results are compared between two different numerical methods and codes: smoothed particle magnetohydrodynamics (SPMHD) with the PHANTOM code, and the grid-based code FLASH. We find that the growth ra...

Sedimentation dynamics of magnetite (γ-Fe3O4) nanopowders (10 20 nm) in water in the presence of a gradient magnetic field was studied by optical and Nuclear Magnetic Resonance (NMR) relaxometry methods. The magnetic field B ≤ 0.3 T, dB/dz ≤ 0.13 T/cm was produced by the system of permanent strip magnets. The initial sedimentation rate of the nanoparticles in water and under magnetic fields is ...

This paper develops an effective control framework for DC voltage control and power-sharing of multi-terminal DC (MTDC) grids based on an optimal power flow (OPF) procedure and the voltage-droop control. In the proposed approach, an OPF algorithm is executed at the secondary level to find optimal reference of DC voltages and active powers of all voltage-regulating converters. Then, the voltage ...