The transition from agriculture towards manufacturing serves as a key feature in economic development in developing countries. In such the transition, there occurs a flow of laboring force from rural (agricultural) to urban (industrial) areas, resulting in the drop in agricultural GDP but the rise in industrial GDP. This substantially affects the economic structures as the rural to urban...
Two dimensional (2D) materials have drawn a lot of attention due to the outstanding properties apart from their bulk counterpart. Since the discovery of the graphene, many 2D materials have been synthesized such as BN, MoS$_2$, WS$_2$, and ZnO. These new 2D materials open the opportunity in manufacturing the next generation nano-scale electronic devices. Recently, novel 2D materials, i.e....
CH$_3$NH$_3$PbI$_3$-based perovskite solar cell continues to attract great attention because its power conversion efficiency has been increased rapidly, from 3.8% in 2009 to 22.1% in late 2017. However, the existence of the toxic Pb hindered further large-scale application. Recently, there are several Pb-free candidates that have been proposed. Among all promising candidates, the Bi-based...
In this work, the disease spreading under SEIR framework (susceptible-exposed-infected-recovered) and agent-based model was investigated via discrete magnetic spin and Monte Carlo simulation. The defined systems were two-dimensional square-lattice-like, where the spins (representing susceptible, exposed, infected, and recovered agents) were allocated on lattice sites. Taking flu-like disease...
In this work We consider the equation motion of an accelerating finite spherical shell charged particle which brings to the Landau-Lifshitz equation. This equation show that an acceleration of charged particle depends on an external force and its derivative. We find the solution of the acceleration from external rectangular force. SO that we solve the velocity and position of the charged...
The air pollution studies usually scoped on the pollutant convection and diffusion from the emission sources. An emphasis on horizontal directions as how wide the range of pollution can spread out is a key parameter. The study domains are usually set at very large horizontal dimensions (xy-direction) compare with the vertical dimension (z-direction). In a recent work, the stochastic Lagrangian...
In this study, the magnetization and hysteresis of thin film were study under the applying magnetic field and laser pulses by using the Monte Carlo and Finite Element method. The results show that the hysteresis loop will be existed when the frequency of applied laser pulse is a multiple integer time the frequency of magnetic field. If the frequency of laser pulse that is non-integer times the...
The traffic congestion is a big problem in our country and in the world. Management of traffic becomes a very important issue. In this project, management of traffic light stop was studied with computer simulation. We simulated the traffic flow model under condition of a Cellular automata model using C programming. Our objectives are to simulate traffic flow through traffic light using...
Reaction-diffusion equations can describe a wide range of transport processes in physical, chemical and biological systems. The solutions of this equations predict that the particle or population density evolves as the traveling wave with unlimited constant speed. As we know, the speed of sound is highest admissible value in a medium. However, this property is lost in the conventional...
