1,721,070 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
Explicit expressions related to degenerate Cauchy numbers and their generating function: Explicit expressions related to degenerate Cauchy numbers
No full textFeng Qi, Ai-Qi Liu, and Dongkyu Lim, Explicit expressions related to degenerate Cauchy numbers and their generating function, In: J. Singh, D. Kumar, H. Dutta, D. Baleanu, and S. Purohit (eds), Mathematical Modelling, Applied Analysis and Computation, ICMMAAC 2018 (Jaipur, India, July 6-8, 2018), Springer Proceedings in Mathematics & Statistics, vol. 272, Chapter 2, pp. 41--52, Springer, Singapore, 2019; available online at https://doi.org/10.1007/978-981-13-9608-3_2.International audienceIn the paper, by virtue of the Fa\`a di Bruno formula and two identities for the Bell polynomials of the second kind, the authors establish an explicit expression for degenerate Cauchy numbers and find explicit, meaningful, and significant expressions for coefficients in a family of nonlinear differential equations for the generating function of degenerate Cauchy numbers
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
Sub-diffusion equations of fractional order and their fundamental solutions
No full textThe time-fractional diffusion equation
is obtained by generalizing the standard diffusion equation
by using a proper time-fractional derivative
of order in the Riemann-Liouville (R-L) sense
or of order in the Caputo (C) sense,
with
The two forms are equivalent and the fundamental solution of
the associated {Cauchy} problem is interpreted as
a probability density of a {self-similar} non-Markovian stochastic process,
related to a phenomenon of sub-diffusion
(the variance grows in time sub-linearly).
A further generalization is obtained by considering
a continuous or discrete distribution of fractional
time-derivatives of order less than one.
Then the two forms are no longer equivalent.
However, the fundamental solution still is a probability density
of a non-Markovian process but one exhibiting a distribution of time-scales
instead of being self-similar:
it is expressed in terms of an integral
of Laplace type suitable for numerical computation.
We consider with some detail two cases
of diffusion of distributed order: the double order and
the uniformly distributed order discussing
the differences between the R-L and C approaches.
For these cases
we analyze in detail the behaviour
of the fundamental solutions
(numerically computed) and
of the corresponding variance
(analytically computed) through
the exhibition of several plots.
While for the R-L and for the C cases the fundamental solutions seem not to differ too much
for moderate times,
the behaviour of the corresponding variance for small and large times
differs in a remarkable way
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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