Nonvolatile memory devices, memory systems and related methods of operating nonvolatile memory devices are presented. The heat-processing step is carried out while controlling a vapor pressure of a refractory metal oxo-acid generated on a surface of the high-melting metal layer. Light pulses are transmitted into the interior of the dishwasher and received by the receiving unit. A vehicle accident risk is determined based on the nearby object location and velocity. In the resultant mounting structure, the thermoplastic resin layer covers substantially the entire surface except for the soldered portion of the electronic component and a portion of the solder. The preferred anthracycline agent is selected from the group of daunorubicin, doxorubicin, and idarubicin, while the preferred cytidine analog is selected from the group of cytarabine, gemcitabine, or 5-azacytidine.