A continuous measurement-while-drilling surveying apparatus includes a fiber optic gyroscope sensitive to rotation about the tool spin axis of the bottom hole assembly and a second fiber optic gyroscope sensitive to rotation of the bottom hole assembly about an axis normal to the tool spin axis. After targeting superabsorbent material into a segment of absorbent core material, a first sensor is used to determine a change in concentration of superabsorbent material over the length of the segment, or alternatively, a rate-of-change in the concentration is determined. A timestamp indicating when the level of actual network bandwidth utilization was monitored is then provided. A coating liquid for forming the semiconductor film includes both a component for forming the semiconductor film as well as the spacer particles, dispersed in a dispersion medium. A method of manufacturing the flexible energy conversion device is also provided.