Disclosed herein is an apparatus that includes a ferrocapacitor disposed on a damascene barrier film. Solutions include using cryostats with multiple cooling circuits. In particular, this invention describes a system for draining fluid from a brain or spinal fluid cavity according to the inventive method of processing pressure signals. Billboards which are substantially flush with the ground surface are located in the airside, preferably adjacent the runways. Users are presented a series of questions and based on their answers and clicking on buttons with the answers embedded in them, they are linked to webpages with the correct research method or statistical test based on their responses to the questions presented. A method for preparing the material, and uses of the material for separating an analyte from an undesired constituent are also provided.