Generating an output signal having a frequency of 1 of the frequency of the input signal, wherein M represents an integer and F represents a non-zero fraction. The compartment can contain permanent or removable psychological message andor printed messages. The system includes a central server accessible via a network having a processor, software, random memory, and data storage hardware. The textual query is determined to include a carrier phrase of one or more words that is reserved by a first third-party application program installed on the computing device. While not circulating drilling fluid through the wellbore, a second resistivity of the formation drilled is measured.