1,720,959 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
Application of hydrophilic-lipophilic deviation (HLD) formulation concept to multiple emulsion.
No full textDouble emulsions: formulations, scope and vehicular systems.
No full textMultiple emulsions are complex and
metastable systems. The droplets of the dispersed
phasecontain even smaller dispersed droplets
themselves.Each dispersed globule in the double
emulsion forms avesicular structure with single or
multiple aqueouscompartments separated from the
aqueous phase by alayer of oil phase compartments.
They could bepotentially applied to several usages so
aspharmaceutical drug delivery, foods and
cosmetics.W/O/W emulsions present many
interestingpossibilities for the controlled release of
drugs andcosmetics. They can entrap substances in the
inneraqueous phase, protect them from degradation
andmodulate their release rate to improve product
efficacy.
It has been shown that this release depends on
variousmechanisms. The composition of the
multipleemulsions is significant importance since the
differentsurfactants, along with the nature and
concentration ofthe oil phase, will affect thestability of
the doubleemulsion. Several works has been done on
the nature ofoils in relation to the selected emulsifiers
and theirinfluence on the manufacturing conditions, as
well ason the stability of the double emulsion. The
emulsifiers
have been found to migrate from one interface to
theother and alter the interfacial emulsifier
organization. It seems that the stability could be
improved byincreasing the lipophilic surfactant
concentration,which could strengthen the interfacial
film
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
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