1,721,093 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
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
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
The role of the schizophrenia risk gene DiGeorge Critical Region 2 in projection neuron maturation in the medial prefrontal cortex
No full textSchizophrenia spectrum disorders have been linked to developmental alterations in the migration, maturation and function of projection neurons in brain regions such as the human dorsolateral prefrontal cortex. To explain these defects, many candidate risk genes have been proposed, some of which belonging to the 22q11.2DS region. This is the case of DGCR2, a schizophrenia risk gene previously shown in the lab to control the migration of superficial layer neocortical projection neurons.
For this thesis, we focused on the implication of Dgcr2 in the post-natal maturation of projection neurons dendritic spines. In this purpose, we performed a morphological analysis of spines coming from mice brains which underwent knock-down of Dgcr2 expression specifically in projection neurons during their development. We noticed a globally more immature dendritic spine profile in the Dgcr2 knock-down condition, a result compatible with previous findings in schizophrenia.
As a second aim, we also analysed results from a new genetic transfection method: in utero electroporation using a triple-electrode probe. We tested if this approach allows us to target efficiently, selectively and bilaterally a murine brain region called medial prefrontal cortex. This latter is known for its strong anatomical and functional homologies with the human dorsolateral prefrontal cortex. We showed that this technique presents a lot of advantages in comparison with its previous version using two electrodes, but also some limitations. We also identified some parameters in the procedure we have to improve in order to create a valid murine behavioural model of a medial prefrontal Dgcr2 knock-down alteration. </p
Impact of early-life serotonin dysregulation on cortical interneuron development
No full textEarly-life deficiency of the serotonin transporter (SERT) gives rise to a wide range of psychiatric-relevant phenotypes. Among the targets of early-life serotonin, the serotonin receptor 3A (5-HT3AR) specifically controls the embryonic migration and postnatal cortical laminar positioning of caudal ganglionic eminence (CGE) derived cortical interneurons (cINs). Here we investigated the impact of early-life SERT deficiency on the migration and positioning of CGE-derived cortical INs in SERT-ko mice and in mice exposed to the SERT inhibitor fluoxetine during the late embryonic period using microarray-based expression analysis and confocal imaging. We further aimed to identify the genetic programs that control the diversity of 5-HT3AR-expressing interneurons using single-cell RNA sequencing. Postnatal studies revealed that SERT-deficiency affects the cortical laminar distribution of specific CGE-derived interneuron. Preliminary single-cell results indicate that the combinatorial expression of transcription factors Nr2f2 and Sp8 may be a promising method to start re-classifying 5-HT3AR-expressing IN subtypes into biologically relevant subgroups
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
