A first time division multiplex time slot is provided which is defined as a bi-directional channel for use in a TDM network including a source node and a destination node. A sub-slit for forming an open stub that is connected to the U-turn portion and that provides the U-turn portion with electrostatic capacitance is formed in the feeding radiation electrode. The receiver assembly includes an analyzer for polarimetrically processing the signal, including differencing the signal to generate a difference electric field proportional to the difference of the sample and reference electric fields. The device may extract the identifier from the received message, compare the extracted identifier to an identifier that is associated with the call, and determine whether the call routing device correctly forwarded the call based on the comparison. Methods are conducted using sequencing technology to detect and enumerate immunoglobulin isotype profiles within a heterogeneous biological sample. The shovel device is adapted to create an edge portion and further has a rearward wall so as to more easily allow the repositioning of removed earth from the edge region.