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    Appropriate Similarity Measures for Author Cocitation Analysis

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    We provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis

    UMNH:Mamm:1259

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    UMNH:Mamm:1259 Voucher Specimen Study Ski

    England and Normandy, 1204-1259

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    In 1204, Normandy submitted to King Philip Augustus of France but the kings of England refused to acknowledge the loss of the duchy, or of the other Angevin possessions conquered by the French kings, until the Treaty of Paris of 1259 - Apart from king John's grandiose attempt of 1214 to recover all the conquered provinces, no serious attempt was made by an English king between 1204 and 1259 to recover the duchy. Consequently, most modern historians tend to speak of the "loss of Normandy" in 1204 and the "formal" surrender of all English claims there to in 1259 as if the events of the former date had effectively severed England and Normandy forever. It is generally felt that on the whole the links with England were very soon forgotten and that after 1204 the duchy settled down quite happily under her new French masters who adopted a conciliatory policy towards her. This thesis questions the current orthodoxy as summarized above. It examines Anglo-Norman relations between 1204 and 1259 and reveals that strong ecclesiastical, economic and tenurial link continued to exist between England and Normandy throughout the period. Consideration is also given to the relations of the various sectors of Norman society with their new Capetian rulers and it is suggested that these were not as harmonious as previously supposed. Finally, an attempt is made to assess the political significance of these two factors as far as Anglo-French relations were concerned

    RAAPRAPPORT 1259

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    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

    1259. Chronicon Britannicum

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    1259. Chronicon Britannicum. In: Molinier Auguste. Les Sources de l'histoire de France - Des origines aux guerres d'Italie (1494). II. Époque féodale, les Capétiens jusqu'en 1180. Paris : A. Picard et fils, 1902. p. 67
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