A mathematical model for the analysis of a gas-solid reacting system is presented. This model is an alternative to the classical shrinking-core model. The model
In 2011, Chinese researcher Ni found the solution of the Oppenheimer-Volkoff problem for a stable configuration of stellar object with no internal source of ene
Six-spoke Sun wheels have previously been described by us from Mesopotamia, rock-carvings in Sweden and a golden sky dome from Sweden. The division of the Sun w