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With the goal of bringing to reseachers of the ancient andean khipus with a tool to share and process electronically the current corpus of these ancient information devices, I present on this paper a proposal for a Quipu Description Format QDF, a XML based file format designed to describe such documents in a systematic and computer standard way.
Current interpretation of pH-metering tracings takes into account several variables which indirectly reflect how many times and for how long time pH falls below a threshold value and how efficient is acid clearance. In this investigation we have tested the hypothesis that area under pH curve summarizes all the former values in one single figure. We have… (More)