1,721,020 research outputs found
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
ZmMPK6, a novel maize MAP kinase that interacts with 14-3-3 proteins
No full textAlthough an increasing body of evidence indicates that plant MAP kinases are involved in a number of cellular processes, such as cell cycle regulation and cellular response to abiotic stresses, hormones and pathogen attack, very little is known about their biochemical properties and regulation mechanism. In this paper we report on the identification and characterization of a novel member of the MAP kinase family from maize, ZmMPK6. The amino acid sequence reveals a high degree of identity with group D plant MAP kinases. Recombinant ZmMPK6, expressed in Escherichia coli, is an active enzyme able to autophosphorylate. Remarkably, ZmMPK6 interacts in vitro with GF14-6, a maize 14-3-3 protein and the interaction is dependent on autophosphorylation. The interacting domain of ZmMPK6 is on the C-terminus and is comprised between amino acid 337 and amino acid 467. Our results represent the first evidence of an interaction between a plant MAP kinase and a 14-3-3 protein. Possible functional roles of this association in vivo are discussed
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
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
Fatal phaeochromocytoma in pregnancy. Case report
No full textA case of phaeochromocytoma in pregnancy is reported. In this case, the tumour, without any symptoms during pregnancy, remained undiagnosed. A severe iachycardia occurred during cesarean section; successively, the woman developed pulmonary oedema. The woman died of cardio-respiratory failure, four days after the onset of the arrhythmia. The diagnosis of phaeochromocytoma was made only at autopsy
In vitro and ex vivo evaluation of the anti-Giardia duodenalis activity of the supernatant of SLAB51 (SivoyTM)
No full textThe effects on Giardia duodenalis growth (G), adherence (A), and viability (V) of SivoyTM
probiotic supernatant were evaluated in vitro and ex vivo. SivoyTM (101 UFC) was in vitro
cultured and the obtained supernatant was filtered, adjusted at pH 7, and added (100 μl/ml) as
such (FS) or after heat-treatment to G. duodenalis (5×104) cultures in TYI-S-33 medium.
Negative and metronidazole 20 μg/ml (M) treated controls were used. Ex vivo, five- 1 cm long
mice duodenal portions were cultivated in standard conditions with 5X105 G. duodenalis
trophozoites/ml, while to further five duodenal portions similarly cultured and infected, FS 200μl
was added. After 12 and 18h, samples were fixed in 10% buffered formalin and histologically
processed to score Giardia infection and cell damage. Cells proliferation/apoptosis were scored
by TUNEL, Caspase–3, and Ki67 tests. All data, in triplicate, were statistically evaluated (P<
0.05). Results showed that FS significantly reduced Giardia G and V respect to negative
controls but its efficacy was lower than that of M, while the inhibition of A was similar to that of
M. Moreover, the effects of FS were significantly lowered by heat-treatment and the reduction
was statistically higher at 90°C than at 56°C, indicating a heat-sensitive nature of active FS
compounds. In ex vivo trials, in intestinal sections treated with FS respect to untreated controls
viable G. duodenalis trophozoites and enterocyte TUNEL+ and Caspase-3 expression were
significantly reduced, while enterocyte Ki67 expression was significantly increased, confirming
the anti-G. duodenalis activity of FS observed in vitro
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