1,721,028 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
The dual nature of (stellar) feedback in galaxy evolution
Full text linkFeedback processes are central to the evolution of galaxies since they regulate the baryon flow to and from them. However, these processes are extremely difficult to simulate owing to large range of spatial scales that need to be modelled. In the cosmological context there is a general consensus on feedback being a “negative” process that limits the conversion of gas into stars by the creation of large-scale outflows. On smaller scales high-resolution simulations have shown that (stellar) feedback can actually promote gas accretion from the hot phase of the CGM (the so-called corona), thus acting as a “positive” feedback mechanism. How these two opposed natures of feedback can co-exist in the current paradigm of galaxy evolution is still not clear. In this talk, I will illustrate the dual nature of feedback processes and its implications for the evolution of galaxies by focusing on the current status of the numerical simulations in which feedback plays a key role
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
Formation and evolution of young massive clusters in galaxy mergers: the SMUGGLE view
Full text linkGalaxy mergers are known to host abundant young massive cluster (YMC)
populations, whose formation mechanism is still not well-understood. Here, we
present a high-resolution galaxy merger simulation with explicit star formation
and stellar feedback prescriptions to investigate how mergers affect the
properties of the interstellar medium and YMCs. Compared with a controlled
simulation of an isolated galaxy, the mass fraction of dense and high-pressure
gas is much higher in mergers. Consequently, the mass function of both
molecular clouds and YMCs becomes shallower and extends to higher masses.
Moreover, cluster formation efficiency is significantly enhanced and correlates
positively with the star formation rate surface density and gas pressure. We
track the orbits of YMCs and investigate the time evolution of tidal fields
during the course of the merger. At an early stage of the merger, the tidal
field strength correlates positively with YMC mass, , which systematically affects the shape of the mass function and age
distribution of the YMCs. At later times, most YMCs closely follow the orbits
of their host galaxies, gradually sinking into the center of the merger remnant
due to dynamical friction, and are quickly dissolved via efficient tidal
disruption. Interestingly, YMCs formed during the first passage, mostly in
tidal tails and bridges, are distributed over a wide range of galactocentric
radii, greatly increasing their survivability because of the much weaker tidal
field in the outskirts of the merger system. These YMCs are promising
candidates for globular clusters that survive to the present day.Comment: 15 pages, 12 figures. MNRAS accepted on Mar. 9t
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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