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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Enhanced lattice boltzmann modelling of axisymmetric flows
No full textAn enhanced axisymmetric Lattice Boltzmann fluid simulation model developed by the second author involves no calculation for velocity gradients and has the feature that all external force terms can simply be added to the model. In this paper, the model is extended and applied to investigate the characteristics of two complex axisymmetric flows for further assessment of its capability. First of all, Taylor-Couette flow for Newtonian and non-Newtonian fluids is considered. The combined effects of the Reynolds number, the radius ratio and the power-law index n on the flow characteristics are analysed for an annular space of finite aspect ratio. Different forced axisymmetric laminar coldflow jets are then taken into account with different values of forcing amplitudes in the jets. The numerical results are compared with existing numerical results and experimental data reported in the literature to demonstrate the accuracy of the model
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