1,721,002 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Investigation of the effectiveness and robustness of a MEMS-based structural health monitoring system for composite laminates
Get PDFFailure of layered composites can be triggered by
small inner defects; such defects can be present inside the
composite from the beginning, or can be incepted by external
actions during the life cycle of the structure. Defects generally
evolve, under repeated loadings, into a delamination or debonding
between adjacent laminae, and cannot be easily detected as
they are masked by the composite skin: ad hoc health monitoring
systems are therefore required. To prevent any distortion of
the composite microstructure, which may trigger by itself the
nucleation of the aforementioned defects, sensors should not
be embedded inside the composite; in addition, to avoid a
mechanical interaction between the monitoring system and the
structure, sensors should be as lighter as possible. To comply
with these two major requirements, we have recently investigated
a microelectromechanical system-based, surface-mounted health
monitoring strategy for laminates. In this paper, we provide the
results of an experimental campaign to show the effectiveness of
this strategy, in terms of sensitivity to the length of delamination
in standard specimens (independently of the loading conditions
at the tip of the delamination), and its robustness, in terms of
repeatability of the outcomes relevant to the monitored state.
The experimental data are compared with analytical predictions
based on beam bending theory, showing a good accuracy
Variations on the Author
Get PDF“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
Get PDFWe 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
Get PDFWe 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
Modeling of fluid damping in resonant micro-mirrors with out-of-plane comb-drive actuation
Get PDFComb-drive micromirrors are becoming of interest for a broad range of light
manipulation applications. Due to technical reasons, some of these applications require
packaging of the micromirror’s optical module in ambient air. Furthermore, micromirrors
for picoprojectors application are required to function at high frequencies in order to
achieve high resolution images. Accordingly, a study of the energy dissipated due to the
interaction between the moving parts of the micromirror and the surrounding air, leading to
fluid damping, is an important issue. Even if air damping has been thoroughly studied, an
extension to large air domain distortion linked to large tilting angles of torsional
micromirrors is still partially missing. In such situations, the flow formation turns out to be
far more complex than that assumed in analytical models. This task is here accomplished
by adopting three-dimensional computational fluid dynamics models; specifically, two
models, holding at different length scales, are adopted to attack the problem through an
automated dynamic remeshing method. The time evolution of the torque required to
compensate for the fluid damping term is computed for a-specific micromirror geometry
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
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