1,720,967 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
AVASPEC 2048: an innovative spectroscopic methodology to differentiate the natural emeralds from the synthetic ones
No full textNew and sophisticated synthetic gems are constantly introduced in the market making the
identification of them very difficult, if one uses only the microscope. In this paper we present
the results obtained from a new methodology, the AvaSpec-2048 spectrometer, that can help
to identify the natural emeralds from the synthetic ones. The AvaSpec-2048 spectrometer
is an original instrument that can acquire electromagnetic spectra in a range between 400
nm and 1000 nm (VIS-NIR), and can be used to identify gemological materials allowing an
accurate discrimination of natural products from the artificial ones. The physical and optical
properties, microscopic features and absorption spectra of natural and synthetic emeralds
have been also investigated through others traditional methodologies such as optical analysis,
specific gravities, refractive indices and Vis-NIR spectroscopy. The comparison of the
absorption spectra obtained with the AvaSpec-2048 spectrometer could also allow to identify
the ore of extraction (and not only the State)
Gemological, physical and chemical properties of prase opals from Hanety Hill (Tanzania)
No full textChemical, physical and gemological properties of some green “prase” opals from Hanety
Hill in Central Tanzania were investigated. The color of the opals ranges from clear green to
apple green, diaphaneity from translucent to semitransparent, luster is vitreous, and all result
inert to UV lamp radiations. Specific gravity values are between 2.11-2.13, refractive indices
between 1.439 and 1.458. XRD and FTIR analyses show the opals belong to the CT type,
with prevailing tridymite. SEM observations revealed a mammillary structure formed by
spherules with a diameter around 10-12 μm, on their turn composed of silica microspheres.
The opals show a homogeneous chemical composition with very high contents of Ni and
lower of Mg, Ca, Fe and transition elements like Zn, Cr and Co. Al and K are nearly absent.
The chemical composition of the opals reflects that of serpentine rocks. Because of its
abundance, the cromophore element responsible for the green color is Ni. Prase opals may
have formed through the process of low temperature metamorphism, which generated the
serpentinite from a magmatic ultrafemic rock
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
- …
