1,720,976 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
Defense mechanisms and personality psychopatology in adolescence. A correlation study between DMRS and SWAP-200.
No full textStudy of the dosimetric robustness of PVA-GTA based Fricke gels against manufacture parameters
No full textPurpose. Fricke gel dosimeters (FGDs) based on poly-vinyl alcohol
(PVA) as gelling agent and glutaraldehyde (GTA) as cross-linker,
were developed with the aim to overcome the drawbacks affecting
the FGDs prepared with traditional natural gel matrices like gelatin
or agarose [1]. Here, we investigate the dosimetric robustness of
PVA-GTA FGDs against parameters influencing their preparation, like
pH and temperature of gelling.
Materials and Methods. PVA-GTA matrices undergo gelling by
heating instead of cooling. Gelling temperatures from 6 C to 40
C were considered. FGDs with PVA and GTA concentrations of
10% w/w and 1% w/w respectively, were arranged preparing Fricke
solutions with different amounts of sulfuric acid in the interval
18–100 mM. FGDs in spectrophotometry cuvettes (10 mm optical
path) were uniformly irradiated with a 137Cs source. The optical
absorbance (OA) properties and dose-response in the interval
0–35 Gy were investigated. Furthermore, FGDs in form of thin
layers (3 mm optical path, area 10 5 cm2
) were irradiated with
80 kV X-rays producing a steep dose gradient. Light transmittance
images were acquired before irradiation and at consecutive
times up to 6 h post-irradiation to derive the Fe3+ diffusion
coefficient.
Results. OA spectra and dose-response curves of FGDs were independent of the gelling temperature. A sensitivity of approximately
0.073 Gy-1 was obtained. By contrast, as in traditional FGDs, sulfuric
acid concentration significantly affected the OA spectra as well as
the sensitivity and linearity of the PVA-GTA FGDs. Both gelling temperature gradient and pH did not influence the Fe3+ diffusion coefficient, assessed equal to approximately 0.22 mm2
/h, i.e. more than
two times lower than in traditional FGDs.
Conclusions. The robustness of PVA-GTA-FGDs against preparation
parameters represent a significant advantage over traditional FGDs.
In particular, the response independence of the gelling temperature
may enable the manufacture of large FGD phantoms without any
gradient in sensitivit
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
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
- …
