1,721,054 research outputs found
Certain Aspects of Bonobo Female Sexual Repertoire Are Related to Urinary Testosterone Metabolite Levels
No full textWe examined the unknown relationship between testosterone and sexual behaviour in female bonobos (Pan paniscus) on a daily and long-term level. In most animal species, sexual behaviours mainly focus on reproduction. Bonobos, however, also use sexual interactions to a large extent to maintain and restore social relationships. They display an elaborate sexual repertoire that is expressed during fertile as well as non-fertile periods in life and exhibit a high degree of female control over sexual interactions. Using urinary testosterone metabolite levels of cycling and non-cycling females, we found no relationship between daily differences in testosterone metabolite concentrations and any of the sexual behaviours. However, long-term differences in the variables partially confirm the hypothesis of Jurke et al. [2001] stating that in bonobos testosterone is primarily related to non-reproductive sexual interactions. Furthermore, remarkably, a negative correlation of testosterone metabolite levels with the frequency of the females’ sexual inspections was demonstrated. No correlation was found with the frequency of sexual presentations performed by the females and with the frequency of masturbation. We present a case study on this topic in an immigrating female
Urinary testosterone-metabolite levels and dominance rank in male and female bonobos (**Pan paniscus**)
No full textUrinary testosterone metabolite levels and aggressive behaviors in male and female bonobos (**Pan paniscus**)
No full textApplication of Urinary and Fecal Steroid Measurements for Monitoring Ovarian Function and Pregnancy in the Bonobo (Pan paniscus) and Evaluation of Perineal Swelling Patterns in Relation to Endocrine Events1
No full textUrinary Testosterone Metabolite Levels in Bonobos: A Comparison with Chimpanzees in Relation to Social System
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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
- …
