1,720,976 research outputs found
Macroalgal photophysiology in the intertidal zone on Tromsøya
No full textMacroalgal physiology in the winter spring transition was analysed variable fluorescence tools. Estimates include quantum yield and the parameters alpha and maximum rates for electron transport rate versus irradiance curve fits. The species included: Pelvetia canaliculate, Fucus spiralis, Fucus vesiculosus, Ascophyllum nodosum and Fucus serratus
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
Temporal and spatial variability of sympagic metazoans in a high-Arctic fjord, Svalbard
Full text linkSvalbard is one of the fastest warming regions in the Arctic including massive loss
in fjord sea ice both in terms of area coverage, ice thickness and duration. Sea ice
is a habitat for a wide variety of microscopic flora and fauna, and we know little
about the impact of accelerated loss of sea ice on this unique sea ice community.
Here, we present the first study on the seasonal progression and spatial
distribution of the sympagic meiofauna community, in a Svalbard fjord.
Further, the meiofauna community in sea ice versus the water column below
were compared to investigate the link between the two habitats. In total, we
found 12 taxa associated with the sea ice and 15 taxa in the water column below
with 11 taxa occurring in both habitats. However, a Canonical-analysis (CA)
showed that despite similarities in taxa the two mediums were distinctly different
(potentially) due to the low abundance of ice nematodes and polychaete
juveniles, in pelagic samples. Temporally, ice meiofauna abundances ranged
from 9.7 to 25.3 x 103 ind m-2 from beginning of March to end of April, following
the seasonal build-up of ice algal biomass from 0.02 to 15.99 mg Chl a m-2
during the same time span. For the transect stations, the lowest ice meiofauna
abundance was recorded at the outermost station (VMF2) with 1.6 x 103 ind m-2
and the highest abundance at the mid-station MS with 25.3 x 103 ind m-2. Our
results indicate that fjord ice harbors most ice algae and sympagic meiofauna in
its lower 10-cm with highest values in the lowermost 2-cm, at the sea ice water
interface. Sympagic meiofauna communities were mostly dominated by
nematodes or polychaete juveniles. We observed the phenology of ice
nematodes through the maturation of females and hatching of juveniles from
eggs. Polychaete larvae developed (quickly) into juveniles and grew
morphological features indicative of readiness for settlement. Thus, we
propose, that as with other parts of the Arctic, sea ice in Svalbard fjords plays
an important role in the life cycle of ice nematodes and for accelerating the
growth of polychaete larvae. Loss of coastal sea ice may therefore negatively
impact coastal biodiversity and affect recruitment for some benthic infauna
in Svalbard
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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