1,721,012 research outputs found
Conolophus marthae sp. nov. (Squamata, Iguanidae), a new species of land iguana from the Galápagos archipelago
No full textGentile, Gabriele, Snell, Howard (2009): Conolophus marthae sp. nov. (Squamata, Iguanidae), a new species of land iguana from the Galápagos archipelago. Zootaxa 2201: 1-10, DOI: 10.5281/zenodo.18962
FIGURE 6 in Conolophus marthae sp. nov. (Squamata, Iguanidae), a new species of land iguana from the Galápagos archipelago
No full textFIGURE 6. Head-bob display of Conolophus marthae sp. nov. Multiple series (a, b, c, and d) of head-bob performed by the Holotype (June 2006). The series were performed with the following time intervals between each other: a–b, 27 seconds; b–c, 34 seconds; c–d, 11 seconds.Published as part of Gentile, Gabriele & Snell, Howard, 2009, Conolophus marthae sp. nov. (Squamata, Iguanidae), a new species of land iguana from the Galápagos archipelago, pp. 1-10 in Zootaxa 2201 on page 7, DOI: 10.5281/zenodo.18962
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
The Effects of Predation on the Fecundity of Lava Lizards, Tropidurus Delanonis, of the Galapagos Islands, Ecuador
No full textv, 28 p.Life history traits of an organism, such as number of reproductive
events per season, number and size of offspring, and time of reproductive
maturity, shape that organism's reproductive strategy. Lava lizards,
Tropidurus delanonis, of Gardner Bay, Espanola Island, Galapagos
Archipelago, constitute four reproductively isolated populations which
provide appropriate conditions for investigating variation in this
phenomenon. Each population inhabits a different island of the bay. Two of
these four islands are inhabited by the snake, Phylodryas biserialis, which
preys upon the lizards. On islands with snakes, females have significantly
shorter life spans which may select for compensatorily increased fecundity. To
investigate the effects of the increased predation various characteristics
associated with life history were measured. Females who had just finished
laying eggs were captured and weighed immediately after laying their eggs.
Eggs were then removed from the nests and the lengths, breadths, and masses
were recorded. Even though female body mass did not differ between islands
with snakes and islands without snakes, lizards on islands with snakes laid
larger clutches (more eggs with greater total mass) than lizards on islands
without snakes. Additionally, eggs laid by lizards on islands with snakes were
smaller than those found on islands without snakes. Thus, these observations
are consistent with the hypothesis that, through an increase in clutch size and
total clutch mass, the presence of snakes is selecting for increased fecundity in
lizards inhabiting those islands. Also, eggs on islands without snakes may be
larger resulting in improved hatchling survival in the presence of increased
intraspecific competition. These data provide insight into the complex nature
of life history traits and suggest approaches which may facilitate better
understanding of the evolution of reproductive strategies.Department of Biology. University of New Mexico. Albuquerque, New Mexico
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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