1,721,060 research outputs found
Distribution of hyoscyamine and scopolamine in Datura stramonium
No full textThe production of hyoscyamine and scopolamine in Datura stramonium has been investigated in the different plant parts, at different stages of their life cycle. Maximum contents were found in the stems and leaves of young plants, hyoscyamine being always the predominant component. (C) 2001 Elsevier Science B.V. All rights reserved
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
Caratteristiche distintive e strategie di prevenzione e intervento sul cyber-bullismo in Italia [Distinctive features, prevention and intervention strategies on cyberbullying in Italy]
Full text linkNel corso degli ultimi anni la continua evoluzione dei mezzi di comunicazione ha fatto sì che una parte significativa della comunicazione e delle relazioni interpersonali si spostasse su un piano virtuale. La familiarità di bambini e adolescenti con i nuovi strumenti di comunicazione, tuttavia, può avere conseguenze dannose a causa di un utilizzo non consapevole della tecnologia, ponendo questi soggetti in una condizione di vulnerabilità. Il cyberbullismo si configura come una nuova forma di comportamento aggressivo, per certi aspetti più dannosa rispetto al bullismo tradizionale, perché difficilmente controllabile dalla vittima che ha un’oggettiva difficoltà nel difendersi rispetto a un autore che si muove in un mondo contraddistinto dall’immaterialità ed è spesso protetto dall’anonimato della rete. Il presente lavoro si propone di fornire una revisione critica della letteratura sul cyberbullismo analizzandone le definizioni disponibili, le relative concettualizzazioni teoriche e le loro criticità, in- dividuando le caratteristiche distintive a confronto con il bullismo tradizionale ed esaminando le evidenze scientifiche disponibili circa le strategie di intervento e prevenzione nel contesto italiano.During the last years, the continuous evolution of the social media has led to a shift of the communication and interpersonal relationships towards a virtual level. However, the familiarity of children and adolescents with the new communication tools can have harmful consequences due to an unaware use of technology, making these subjects more vulnerable for new forms of aggression. Cyberbullying is a new form of aggressive behaviour, in some respects more harmful than traditional bullying, because the victim has an objective difficulty defending himself/herself against an author who moves in a world characterized by immateriality and is often protected by network anonymity. This paper aims to provide a critical review of the literature on cyberbullying by analysing the available theoretical conceptualizations, identifying the distinctive features in comparison with traditional bullying and examining the scientific evidence about intervention and prevention strategies in the Italian context
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
Aggression Toward Healthcare workers: The effect of indirect victimization on burnout dimensions
No full textPhysical and verbal aggression can occur with significant frequency in the working life of healthcare workers. The effects of such events on the psychological health of victims of workplace aggression have been shown, but their indirect effect has not yet been studied. The present brief report describes an exploratory study investigating the effect of indirect victimization on burnout dimensions in healthcare workers. Two hundred ninety-seven workers completed an online questionnaire to detect direct/indirect workplace-related victimization experiences and the Maslach Burnout Inventory (MBI). The direct physical victimization typology produced a significant effect on all the burnout dimensions while the verbal type had a significant impact on emotional exhaustion and depersonalization, but not on personal accomplishment. Indirect victimization due to verbal aggression produced a significant effect on depersonalization. Aggression prevention and risk containment is important to safeguard workers against violent events but also to preserve perception of a safe workplace protected from all types of aggression. © 2020 Taylor & Francis
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