The radiation magnetohydrodynamics (RMHD) system couples the ideal equations with a gray transfer equation. main challenge is that travels at speed of light while changes time scale fluid. scales these two processes can vary dramatically. In order to use mesh sizes and steps are independent light, asymptotic preserving (AP) schemes in both space desired. this paper, we develop an AP scheme for ...

We present an efficient variance-reduced particle simulation technique for solving the linearized Boltzmann transport equation in the relaxation-time approximation used for phonon, electron, and radiative transport, as well as for kinetic gas flows. The variance reduction is achieved by simulating only the deviation from equilibrium. We show that in the limit of small deviation from equilibrium...

in recent years, the trend in solving optimization problems has been directed toward using heuristic algorithms such as neural networks, genetic and ant colony algorithms. the main reason for this trend can be attributed to the fact that these algorithms can be efficiently adjusted to the specific search space to which they are applied and consequently they can be used for many optimization pro...

How does the electoral geography of legislative districts affect pork barreling? This article presents a formal model extending Mayhew’s classic credit-claiming theory to account for the electoral geography of bicameralism. Under bicameralism, upper chamber (Senate) and lower chamber (Assembly) legislators who share overlapping constituencies must collaborate to bring home pork projects. Collab...

Lattice Boltzmann simulations are used to investigate spinodal decomposition in a two-dimensional binary fluid with equilibrium lamellar and droplet phases. We emphasise the importance of hydrodynamic flow to the phase separation kinetics. For mixtures slightly asymmetric in composition the fluid phase separates into bulk and lamellar phases with the lamellae forming distinctive spiral structur...

Stability of foundations near slopes is one of the important and complicated problems in geotechnical engineering, which has been investigated by various methods such as limit equilibrium, limit analysis, slip-line, finite element and discrete element. The complexity of this problem is resulted from the combination of two probable failures: foundation failure and overall slope failure. The curr...

Abstract We use the notion of Halpern-type sequence recently introduced by present authors to conclude two strong convergence theorems for solving bilevel equilibrium problems proposed Yuying et al. and some authors. Our result excludes assumptions as were cases in their results.