Inkjet print head dies are directly seated upon an exterior of a tubular member so as to face different directions. Each of the microbeam delivery devices or synchrotron irradiation ports is adapted to deliver at least one microbeam of radiation along a microbeam delivery axis, wherein the microbeam delivery axes of the plurality of microbeam delivery devices cross within a common target volume. Further, a silicon oxide film forming step of oxidizing the silicon film after the heat treatment step to generate a silicon oxide film, and a silicon oxide film removal step of removing the silicon oxide film may be included. A server system may determine that the zoom level indicated in the request is less than a threshold value and identify content items within the viewable area which meet predefined criteria for being considered expensive. At least one remote unit transmits a training sequence in at least one upstream OFDM signal to the host unit and the host unit uses the training sequence to assist in demodulating the upstream OFDM signal of the at least one remote unit.