1,721,014 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
Examination of the effects of botulinum toxin therapy on intracortical excitability and writing movements in patients with writer’s cramp
No full textDas Ziel der Untersuchungen bestand darin, bei Schreibkrampf-Patienten mittels MEP-Untersuchungen und dazu parallelen Schreibanalysen die Effekte einer Botulinumtoxin-Behandlung auf neurophysiologische Parameter wie die intrakortikale Exzitabilität einerseits, und klinische Kenngrößen wie objektive Schriftparameter andererseits zu untersuchen. Die Ergebnisse zeigten eine signifikante Beeinflussung der pathologisch reduzierten intrakortikalen Inhibition bei Schreibkrampf-Patienten durch die Botulinumtoxin-Therapie. Trotz eines deutlichen subjektiven klinischen Effekts der Botulinumtoxin-Therapie spiegelte sich dieser nicht in den objektiven Messungen der Schriftparameter bei der Untersuchung von einfachen Kreisbewegungen wider.The aim of the study was to analyse the effects of botulinum toxin therapy on neurophysiological parameters such as intracortical excitability on the one hand, and clinical parameters such as objective writing parameters on the other, in patients with writer’s cramp by means of MEP-measures and parallel writing analysis.
The results of the study showed a significant influence on the pathologically reduced intracortical inhibition in patients with writer´s cramp as a result of botulinum toxin therapy.
Despite a clear subjective clinical effect of botulinum toxin therapy, there was however no significant effect evident on the objective measurement of writing parameters when simple circular movements were examined
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
Functional connectivity of cerebral and cerebellar networks in patients with writer's cramp investigated with resting state fMRI
Get PDFMittels fMRT wurden Veränderungen funktioneller Ruhe-Konnektivität bei Schreibkrampf-Patienten nachgewiesen. Im cerebellären, sensomotorischen, lateral sensomotorischen und default mode Netzwerk zeigten sich Areale mit erhöhter oder erniedrigter Konnektivität. Dazu zählten Zerebellum, Thalamus, Gyrus frontalis, Gyrus prä- / postzentralis, Lobulus parazentralis, Lobulus parietalis, Zingulum, Precuneus, Lobus insularis und Gyrus temporalis. Dies stützt die Hypothese einer funktionellen Störung im Bereich der zerebello-thalamo-kortikalen Achse bei Schreibkrampf-Patienten.The present fMRI investigation was able to show changes of functional connectivity in writer’s cramp patients at rest. The cerebellar, sensorimotor, lateral motor function and default mode networks showed areas with increased or decreased functional connectivity. This is the case with cerebellum, thalamus, frontal gyrus, cingulum, precuneus, lobus insularis, precentral gyrus, postcentral gyrus, paracentral lobule, temporal gyrus and parietal lobule. These findings support the hypothesis that in the case of writer’s cramp, a functional disturbance in the region of the cerebello-thalamo-cortical pathway is present
Investigation of somatosensory representations in patients with writer’s cramp during tactile stimulation in fMRI
No full textDie Pathophysiologie des Schreibkrampfs (SK) ist bisher nur unzureichend verstanden, das sensorische System scheint jedoch eine wichtige Rolle zu spielen. Wir untersuchten systematisch die zentrale Reizverarbeitung taktiler Stimulation betroffener und nicht betroffener Körperregionen bei SK und Gesunden. Schreibkrampfpatienten zeigten u.a. eine Überaktivität im S1-Handareal während Stimulation der rechten Hand. Dies könnte durch vermindert funktionierende hemmende Netzwerke bedingt sein.The pathophysiology of writer’s cramp (WC) is not completely understood. Previous studies indicate that the sensory system may play an important part. We investigated systemically central processing and cortical representations of punctate tactile stimulation of affected and unaffected body parts in WC and healthy controls. Results included a significant higher activation of the primary somatosensory hand area during stimulation of the right hand in WC. This could be due to loss of inihition
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