In one embodiment, a method for data management includes receiving a request for information associated with an incompatible foreign data source and the compatible native data source. The main member has a chamber therein, a first passageway communicated to the chamber, a resting portion at a bottom of the chamber, an aperture on the resting portion, a vertical chamber communicated with the aperture and a second passageway communicated with the vertical chamber. The alloy layer has a thickness of 5 to 60 \u03bcm, inclusive. Then, a plurality of first stripe patterns and at least two second stripe patterns are generated. In addition, recesses are formed in the insulation structures before forming said first conductive layer. Sensing of salivary flow rate may be further augmented by sensing concentration of at least one analyte in saliva in order to determine a state of euhydration or dehydration.