1,720,967 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
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
Phenotypic and genotypic characterization of lactic acid bacteria isolated from pecorino abruzzo cheese.
No full textkoamabayili/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
Effects of three active ingredients on soil bacterial communities
No full textThe use of bioactive molecules for medical purposes is an important field of industrial activity and gives
rise to release a large amount of chemicals in the environment. Industrial farm producing such molecules
are suitable places to investigate the possible release of contaminants and their effects on biological
communities. Soil microbes are directly affected when active molecules reach environment and thereafter
they are very suitable as experimental tool. Side effects on humans and animals require specific
toxicological studies, to which the knowledge deriving from soil microorganisms can give benefits (Boxall,
2004).
Our research has been focused on the assessment of the effects of glimepiride, ramipril and
pentoxifillyne, three active ingredients belonging to different therapeutic classes, on the functional and
genetic diversity of the bacterial community in soil.
Soil samples of different physical and chemical characteristics were collected from areas exposed to the
risk of contamination by active ingredients inside a pharmaceutical farm estate (I) and from a control (E).
Aliquots of each soil (I, E) were placed separately in plastic boxes and amended respectively with 0, 5,
50, 500 mg/Kg of each active ingredient. Changes in microbial diversity were monitored by culturedependent
methods: bacterial enumeration (CFU), community level physiological profiles (CLPPs)
measured by Biolog EcoplateTM and a culture-independent technique DGGE, over a period of 3 months.
The DGGE profiles of treated and untreated soils were different during the incubation period. In
particular, ramipril treated soils showed a noticeable decrease in bands number respect to the control
soils after 60 and 90 days.
At 90 days, CFU isolated from soils (E), treated with three active ingredients were significantly smaller (P
< 0.05) than the ones from control; soils (I) treated with pentoxifillyne (50 and 500 mg/Kg) and ramipril
(5 mg/Kg) on the contrary gave higher CFU figures.
Results of cluster analysis performed on Biolog data showed that functional abilities of the soil microbial
communities were altered by application of the active ingredients. In particular, a) CLPPs of the
glimepiride and ramipril treatments, especially 500 mg/Kg, differed from the control; b) CLPPs of
pentoxifillyne treated soils taken from pharmaceutical farm (I) were sharply different from control than
pentoxifillyne treated soil taken outside (E). Soil characters were influential on bacterial community
response to active ingredients.
Differences were found on substrate utilization in the Biolog EcoplateTM between treated and untreated
soil, mainly as to the intensity of substrate assimilation.
In conclusion, this study shows that both genetic and metabolic potential of soil microbial communities
are affected by application of these active ingredients
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