1,721,154 research outputs found
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
Interferometric SAR Phase Unwrapping via the Finite Element Method
No full textThe authors present a new twodimensional algorithm for interferometric synthetic aperture radar phase unwrapping based
on the finite element method. The proposed technique allows an efficient least-squares solution carried out in time domain. Weighting
functions can be introduced without increasing computational requirements. The possibility to speed up computations via a multigrid technique is discussed. A noise-robust extension of the
proposed technique is also investigated. Presented experiments on real ERS-1 data, as well as on simulated patterns, demonstrate the precision and efficiency of the procedure
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