Methods, apparatus and systems to keep a desired element properly addressed in a structured document in which particular elements are addressed, even if the structured document is modified. Limiting amplification in conjunction with a logarithmic detection splits an input signal path in two, providing separate phase and amplitude information for downstream digital signal processing, where the separate phase and amplitude information is processed without variable gain artifacts. Database administrators are immediately notified of reoccurring database job failures by e-mail, pager notifications, or other alert methods. The fluidizing gas supplying component supplies a fluidizing gas for fluidizing the bed of silicon particles to a bottom of the heating zone. The responses are memorized by the doll device and are used to select the next interaction. Each display item includes a location to be displayed on the touchscreen.