In thermal management systems that employ EHD devices to motivate flow of air between ventilated boundary portions of an enclosure, it can be desirable to have some heat transfer surfaces participate in electrohydrodynamic acceleration of fluid flow while providing additional heat transfer surfaces that may not. In some examples, biodegradable vascular grafts and methods of fabricating and uses of such are disclosed. The system further includes a sensor associated with each array of sensor openings for sensing energy passing through the sensor openings to thereby sense the item on the transport element. Each configurable interior tile includes a set of configurable logic circuits and a set of configurable routing interconnect circuits for routing signals between the configurable logic circuits. The system comprises means for selecting one shade among mixed shades, means for presenting the selected mixed shade as well as means for specifying the selected mixed shade for making paint in the desired color tone. The valve element is movable from a bypass position to a flow through position in response to discharge pressure of the pump.