1,721,038 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
EFFECTS OF INDICAXANTHIN ON HUMAN MOTOR CORTICAL EXCITABILITY AND PLASTICITY
No full textThe role of nutraceuticals has risen interest in the last decade for complex biological activities exerted on pathophysiological processes such as oxidative stress, inflammatory conditions and excitotoxicity. In this regard, the effects of nutraceuticals on basic functions of neuronal processes, such as cortical excitability and cortical plasticity are still to be unveiled. Translational studies performed on phytochemicals (PhC) with anti-inflammatory and antioxidant properties could trace the path for the possible modulation of neuronal excitability in humans, phenomena involved in neurodegenerative alterations and cell stress. In this context, Opuntia ficus indica is a mediterranean plant containing a betalaine pigment, indicaxanthin, that has been studied for its numerous activities, in particular the ability to cross the Blood-brain barrier (BBB) and to influence neuronal excitability in rats. On these bases we aimed to assess the effects of acute intake of indicaxanthin (IX) on human cortical excitability and plasticity. Eight healthy, right handed male subjects (mean age: 20-45 years) were recruited . No-one had a history or clinical signs of neurological diseases, brain trauma or use of drugs affecting cortical excitability as assessed by a clinical neurologist. Safety guidelines for Non Invasive Brain Stimulation (NIBS) studies were rigidly applied for both stimulation and inclusion criteria. Intracortical facilitation (ICF), short-lasting intracortical inhibition (SICI) and test stimulus (TEST) were recorded (10 times each in a pseudo-randomized order) by means of a paired pulse Transcranial Magnetic Stimulation (TMS) stimulator (Magstim Co, Dyfed UK) before (PRE-TDCS) and after (POST-TDCS) 20’ of anodal transcranial direct current stimulation (tDCS, Neuroconn, Ilmenau, Germany) delivered over right M1. The same data were recorded in baseline condition
(T0) and 2 hours after intake of 400g of cactus pear fruit (T1) in separate sessions. IX significantly increased PRE-TDCS TEST (p<0.01), and PRE-TDCS ICF( p<0.05) whereas PRE-TDCS SICI was unchanged, and significantly reduced POST-TDCS ICF (p<0.0001) and SICI (p<0.001). Our data support the hypothesis that IX is able to modulate human cortical excitability consistently with preclinical evaluations, and specifically to increase excitability of Human Motor Cortex. Moreover, the paradoxical effects after anodal tDCS seems to suggest that the excitatory drive exerted by IX is also able to induce homeostatic responses on motor cortical plasticity
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
Composizione comprendente indicaxantina per uso per la prevenzione e il trattamento del diabete mellito di tipo 2, obesità, stress ossidativo e patologie infiammatorie.
No full textkoamabayili/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
Towards AI literacy : a proposal of a framework based on the episodes of Situated Learning
No full text- …
