Trencséyi, RékaElsayed, Mohamed2021-05-032021-05-032021-04-27http://hdl.handle.net/2437/308090When modeling transport by diffusion or conduction in thin layers, large differences in dimensions of the different domains are common. If the model has a sandwich structure, we can replace the thinnest layers with a thin-layer approximation, provided that the difference in thickness is large.56ennanotechnologythin filmsDEENK Témalista::Fizika