A railcar operating shaft assembly including an operating shaft having first and second ends with a capstan provided at each end of the operating shaft. Silicon or silicon compound can be limited from being eluted into the ink from a circuit board formed from a silicon wafer or the like. The analysis can be a sound pressure level difference, a correlation, a coherence, and a spectral difference. The padding material may be a gel or foam. The method includes adjusting a measurement cycle in a satellite signal receiver by computing a position state comprising at least one of a velocity and a heading of the satellite signal receiver, detecting a change in the position state, and automatically adjusting a frequency of the measurement cycle in response to the change in the position state.