1,721,002 research outputs found
Four decades of mathematical system theory
Full text linkAs a follow-up to the volume Three Decades of Mathematical System Theory that the authors of this paper edited in 1989 at the occasion of the fiftieth birthday of Jan Willems, we discuss some trends that have become more visible in the past decade. It is argued that system theory is ready to play a role in many different fields of science. Three examples of nontraditional application areas are discussed
The most powerful unfalsified model in identification: festschrift on the occasion of the 60th Birthday of Jan Willems
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The most powerful unfalsified model in identification: festschrift on the occasion of the 60th Birthday of Jan Willems
No full text
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
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