We present a discontinuous Galerkin method for melting/solidification problems based on the “linearized enthalpy approach,” which is derived from conservative form of energy transport equation and does not depend use so-called mushy zone. symmetric interior penalty Lax–Friedrichs flux to discretize diffusive convective terms, respectively. Time discretized with second-order implicit backward di...

a field study of social and political foundation of education is citizenship education. the main purpose of this research was to study citizenship education approaches and perspectives. the current research categorized in field of theoretical methods in which a descriptive- interpretive approach was utilized in data analysis. the most important findings of this research was that critical and so...