1,720,965 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
Hybrid methods for molecular spectroscopy and reactivity
Full text linkIn this thesis a variety of different studies are undertaken coupled together through ap-
plication of the hybrid method ONIOM to compute reaction energies, barrier heights and
vibrational modes of molecules. ONIOM is a means to combine multiple levels of theory such
that different regions of a molecular system are treated with different levels of accuracy
enabling computation on large molecular systems with complex environments at an accuracy
that would be impossible using a single level of theory. The price of ONIOM is a requirement
for computational chemists to specify regions of interest, and in the case of biomolecules
where forcefields are typically used to treat the environment to choose suitably parameterised
forcefield. My initial investigations focused on means to automate this process hence allow
ONIOM to be used within high throughput studies to compute properties of populations of
molecules. Toward this end I present an API allowing construction and execution of ONIOM
calculations including parameterisation for biomolecular simulation which both improves
providence in computational chemical research and enables high throughput calculations.
Following this I investigate ONIOM applied to graphitic fragments first examining a 1,3
dipolar cycloaddition then in order to address the question of how to choose model regions
within these extended delocalised systems I examine whether systematic fragmentation and
use of very cheap computational metrics can allow automatic model selection within a test
hydrogenation reaction. I then turn to an alternative means of computing the effect of the
environment: machine learning and perform a small machine study on solvation of a series
of 6095 constitutional isomers examining whether both the implicit solvation method PCM
and an explicit model of solvation making use of ONIOM can be learned use the machine
learning algorithm Kernel Ridge Regression.
Finally in the last part of my thesis I perform an experimental time resolved spectroscopic
study of the photoactive protein EOSFP examining the photo induced changes that occur both
during and after exposure to the 405nm light which drives photoconversion in this protein
and make use ONIOM to compute vibrational modes that aid assignment of vibrational
spectra.Open Acces
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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