1,721,090 research outputs found
Neuronal mechanisms mediating the variability of somatosensory evoked potentials during sleep oscillations in cats
No full textThe slow oscillation (SO) generated within the corticothalamic system is composed of active and silent states. The studies of response variability during active versus silent network states within thalamocortical system of human and animals provided inconsistent results. To investigate this inconsistency, we used electrophysiological recordings from the main structures of the somatosensory system in anaesthetized cats. Stimulation of the median nerve (MN) elicited cortical responses during all phases of SO. Cortical responses to stimulation of the medial lemniscus (ML) were virtually absent during silent periods. At the ventral-posterior lateral (VPL) level, ML stimuli elicited either EPSPs in isolation or EPSPs crowned by spikes, as a function of membrane potential. Response to MN stimuli elicited compound synaptic responses and spiked at any physiological level of membrane potential. The responses of dorsal column nuclei neurones to MN stimuli were of similar latency, but the latencies of antidromic responses to ML stimuli were variable. Thus, the variable conductance velocity of ascending prethalamic axons was the most likely cause of the barrages of synaptic events in VPL neurones mediating their firing at different level of the membrane potential. We conclude that the preserved ability of the somatosensory system to transmit the peripheral stimuli to the cerebral cortex during all the phases of sleep slow oscillation is based on the functional properties of the medial lemniscus and on the intrinsic properties of the thalamocortical cells. However the reduced firing ability of the cortical neurones during the silent state may contribute to impair sensory processing during sleep
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
Techniques for Portraying a Main Character in Yakut Epic: Investigating Olonkho Texts of Nyurgun Bootur the Swift by P. Oyunsky and Kulun Kullustuur the Obstinate by I. Timofeev-Teploukhov
Get PDFIntroduction. The article examines Yakut heroic olonkho epics — Nyurgun Bootur the Swift by P. Oyunsky and Kulun Kullustuur the Obstinate by I. Timofeev-Teploukhov — for techniques employed to create portraits of main characters. According to N. Yemelyanov, the olonkho Kulun Kullustuur the Obstinate recorded from taleteller I. Timofeev-Teploukhov clusters with earliest patterns of archaic epic, while that of Yakut writer P. Oyunsky (Nyurgun Bootur the Swift) is the first literary adaptation of olonkho texts. The study attempts an insight into how and which particular portrayal techniques were used by P. Oyunsky and I. Timofeev-Teploukhov to depict main characters of theirs. The comparative approach to the narratives recorded in different periods shall make it possible to trace the use of portrayal techniques, which shall underline the unique artistic features characterizing each of the taletellers, and show how such portrayal patterns developed to gain deeper associative essentials in further olonkho texts. Goals. The study aims to identify some distinct features inherent to the techniques of creating main characters’ portraits in the olonkhos Nyurgun Bootur the Swift and Kulun Kullustuur the Obstinate, and outline ethnic specifics in portrayal characteristics. To facilitate this, the paper shall classify portrayals, articulate types of techniques and their functions in portraying a main character, identify stable formulas employed to depict heroes, determine specific features of portrayal as a key technique for the making of an epic hero. The work reviews the existing types of epic portraits, their functions and attributes, examines some visual means serving to unveil the images of main characters. Results. The study attests to the examined narratives are characterized by an increased stability of depictive portrayals with peripheral parts (artistic and emotional epithets) tending to vary. Each such depictive portrayal proves multifunctional, semantically wide, and technically relevant. The descriptions of the heroes’ appearances are somewhat idealized and rich in comparisons, repetitions, evaluative epithets. Portrayal agendas of P. Oyunsky vary through history and depend on actual artistic methods and style employed by the author who pays special attention to fictional details depicted in the context of folk traditions. The study of the techniques helps identify which innovative tools P. Oyunsky used when he was creating his Nyurgun Bootur the Swift
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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