1,720,984 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
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
TAILORING ZnO-BASED PIEZOTRONIC SENSORS BY CHEMICAL SPECIATION
No full textThis work shows the potentiality of analytical speciation as a precious tool in the hands
of a chemist to design ZnO nanostructures (n-ZnO)1 and tune the performances of the
resulting sensors (Figure 1). This principle was firstly applied to 1D n-ZnO piezotronics
wearable heartbeat piezotronic detectors, prepared at mild conditions (85°C, 12 hours)
on flexible circuit boards2 and to the seamless integration of 2D n-ZnO (85°C, 24 hours)
onto flexible ITO/PET strain sensors devices3
. The strain sensors show better
performances in comparison to 1D ZnO based devices along with self-cleaning
properties triggered by the ZnO photocatalytic effect. These devices are easily wearable
and indeed allow for the real time piezoresistive monitoring of finger and elbow
bending (Figure 1). The resistance variation upon bending (about 4-fold) outperforms
similar devices based on 1D -ZnO. Lastly, the two-fold increase of the zinc ions
concentrations and the extension of the reaction time to 60 hours, leads to 3D n-ZnO
structures, namely ZnO cauliflowers. These systems show excellent photocatalytic
activity and are fully integrable into cellulose acetate films to obtain nanocomposite suitable for regenerative medicine platforms
A Fluorescent Perspective on Water Structuring: ACDAN in Salt Solutions and Hydrogels
Full text linkThe interactions and structural organization of water molecules play a crucial role in a wide range of physical, chemical, and biological processes. The ability of water to form hydrogen bonds (H-bonds) underpins its unique properties and enables it to respond dynamically to various environmental factors. These interactions at the molecular level may affect vital processes like protein folding, enzyme activity, and cellular organization. The presence of solutes and spatial constraints can alter the H-bonding network of water, and these effects are ubiquitous in the biological environment. In this study, we analyzed the fluorescence of 2-acetyl-6-(dimethylamino)naphthalene (ACDAN) fluorescence emission in water solutions containing kosmotropic and chaotropic salts and in agar hydrogels. Recently, this dye has proven invaluable in studying water network structure and dynamics, as its fluorescence signal changes based on the local dielectric environment, revealing variations in the dipolar relaxation of water. Our results show that ACDAN spectral response correlates with the degree of water ordering, providing important insights into solute–water interactions and water dynamics in free and confined environments
Electrochemical analysis of rationally designed ZnO nanostructures for biodegradable cellular scaffolds
Full text linkThis work shows a preliminary analysis of a wet-chemistry synthesized platform based on ZnO nanostructures (n-ZnO) for application in regenerative medicine. n-ZnO stability is investigated by electrochemical in-situ sensing of zinc ions released by n-ZnO soaked in simulated biofluids. Impedance analysis allows detecting subtle changes in the bulk solutionimpedance in the range 1 Hz-50 kHz, which can be ascribed to the release of ionic species in solution, among which Zn2+ ions. In parallel, a voltammetry analysis by low-cost mercury-free screen-printed sensors shows the release of Zn2+ ions at not harmful concentrations
- …
