A data streaming apparatus broadcasts data, encoded by a layered encoding algorithm, each layer of encoded data frames being conveyed within separate respective streams of data packets of a predetermined packet structure. For example, one embodiment provides a stent graft including an occlusive material having a preset, overlapping configuration comprising at least three inverted overlapping layers that are folded over one another. This beam propagates through the media to the reflective layer on the opposite side, and is reflected back through the media for readout of the transmission hologram. A plurality of logic transistors are formed outside of the first SRAM array, the plurality of logic transistors including at least first and second logic transistor having first and second gate pitches defined between their source and drain contacts. The weakly conductive property of the electrode enables the prevention of undesirable electrostatic discharge, user skin irritation and electrode corrosion caused by direct contact between the electrode and the user’s skin and also exhibit’s a substantially higher sensitivity than electrodes covered with an insulative material.