1,721,215 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
Enhancing the Sustainability of the Aviation Industry: Airlines’ Commitment to “Green” Practices
Full text linkThe aviation industry represents an important polluter, being responsible for increasing
environmental impacts on global scale. Aiming to approach the adoption of suitable policies
in the aviation industry towards the achievement of the national and international
sustainability goals, the present research tackles airlines’ commitment to aviation-related
environmental issues, as well as their willingness to adopt sustainable aviation fuel (i.e., bio
jet fuel) and sustainable development strategies, focusing on those companies operating
flights in the Karol Wojtyła Airport (Bari, Italy). The paper adopts the χ2 test and the logistic
regression to investigate three different hypotheses related to airlines’ headquarters, carriers’
typology (i.e., low-cost or not, flag carriers or not) and years of service. Results outline that
traditional airlines, either flag carriers or not, as well as South and North American
companies, are more likely to be aware of aviation environmental consequences, publishing
environmental reports and offering to passengers the chance to participate to climate change
reduction (e.g., through online carbon offset programs or more expensive ticket to produce
bio jet fuels). In addition, airlines transiting in Karol Wojtyła Airport show a small
willingness to share information through environmental reports and are scarcely intentioned
to make use of bio jet fuels, confirming that low-cost companies are still less attentive
towards aviation environmental issues. The present research contributes to the empirical
studies on sustainable aviation and carriers’ commitment to environmental strategies,
highlighting the need to enhance carbon offsets programs and digital technologies as the
online compensation of CO2 emissions
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
Wet Aggregate Stability Index: precision assessment of Tiulin method through an inter-laboratory test
No full textMethod providing
indices for judging soil structure stability can be used to estimate
the soil quality allowing comparison between agro-management systems.
For this reason, the laboratory test and the indices generated have
to be very carefully evaluated in order to avoid misleading information.
The present work aims at assessing the precision of the Tiulin method
for determining soil aggregate stability through an inter-laboratory test,
according to the validation procedure proposed by ISO (1994)
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