1,721,019 research outputs found
The Rhaphidophoridae cave crickets of the Eastern Mediterranean area: a check list of species from the Balkan peninsula, Greek islands and Turkey
No full textProceeding
Ther cave crickets of the Eastern Mediterranean area: a contribution to the study of Balkan and Anatolian Rhaphidophoridae diversity
No full textICSB 2010 Abstract Boo
Genetic divergence in the cave cricket Troglophilus neglectus (Orthoptera Rhaphidophoridae): mitochondrial and nuclear DNA data.
Full text linkIn this study we used sequence polymorphisms at one mitochondrial and one nuclear gene (Cytochrome Oxidase subunit I and
Internal Transcribed Spacer 1, respectively) to assess the degree of genetic divergence among 21 populations of the cave cricket Troglophilus neglectus (Orthoptera, Rhaphidophoridae), a species whose currently known range extends from the Balkan Peninsula to Southern Bavaria. Nineteen populations were sampled in Northern Italy, Slovenia, Croatia and Bosnia and Herzegovina, while two populations came from Germany (Lower Saxony) and Czech Republic, thus well outside the species range. Molecular data revealed a high level of fragmentation, with most of the study populations bearing exclusive haplotypes, the sole exception being the German and Czech specimens, which carried haplotypes also occurring at Slovenian locations. Spatial distribution of genetic heterogeneity and pattern of genetic divergence argue in favor of a recent origin of the two Central European populations, possibly through man-mediated dispersal event(s). These populations being not considered, our data are in remarkable agreement with a previous study based on allozymes conducted on a subset of populations of the same species and, more generally, with what is known on the population genetics of peri-Mediterranean Rhaphidophorids
The genus Dolichopoda in Greece: A description of new species from the Ionian Regions and Peloponnisos (Orthoptera Rhaphidophoridae)
No full textDescription of five new Dolichopoda species from the Ionian area of Western Greece together with a description of the female for D. pavesii from Kefalonia island and the male of D. dalensi from North-eastern Peloponnisos are reported. Considering the other 6 species already documented in the area (including the North of the Peloponnisos), there is now a total of 11 recorded species of Dolichopoda which currently inhabit the underground areas of this zone. These new data, therefore, help better define the already high diversity of the genus in the Hellenic region (25 species in all) reinforcing the hypothesis that there was a central area of dispersion of the Dolichopoda in the ancient Aegean plate
Dolichopoda muceddai Rampini & Di Russo, nuova specie di una famiglia di Ortotteri nuova per la Sardegna (Orthoptera Rhaphidophoridae)
No full textMolecular biogeography in East-Mediterranean area as revealed from the phylogeny of the cave cricket genus Troglophilus (Orthoptera, Rhaphidophoridae).
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
- …
