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    Monitoring Hydrogen Absorption in Pd Electrodes by means of Electric and Electrochemical Signals

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    A reliable, nondestructive methodology to determine the actual hydrogen content in hydrogen storage electrodes has been developed. This methodology is based on relative electric resistance measurements, backed up by measurements of electrode potential, since both quantities are or are derived from electric signals, easy to handle and use in automatic data acquisition lines. The setup and procedure for relative resistance measurements, both under electrolysis and at open circuit conditions, will be described and discussed in terms of possible error sources and their relevant uncertainties, on the basis of the results obtained for the Pd-H system, chosen as model system. The use of electric and electrochemical signals to determine the current-potential distribution along the electrode as a function of the cell geometry and the working conditions will also be presented

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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