1,721,137 research outputs found
Mi spezzo e mi piego”. Posture, sollevamenti e disturbi muscoloscheletrici tra insegnanti prescolari
No full textLa psicologia del lavoro e delle organizzazioni di fronte alla sfida del benessere nei luoghi di lavoro.
No full textLa psicologia del lavoro e delle organizzazioni di fronte alla sfida del benessere nei luoghi di lavoro.
Teachers’ work ability: a study of relationships between collective efficacy and self-efficacy beliefs
Full text linkGloria Guidetti,1 Sara Viotti,1 Andreina Bruno,2 Daniela Converso1 1Department of Psychology, University of Turin, Turin, Italy; 2Department of Education Science, University of Genoa, Genoa, Italy Introduction: Work ability constitutes one of the most studied well-being indicators related to work. Past research highlighted the relationship with work-related resources and demands, and personal resources. However, no studies highlight the role of collective and self-efficacy beliefs in sustaining work ability. Purpose: The purpose of this study was to examine whether and by which mechanism work ability is linked with individual and collective efficacies in a sample of primary and middle school teachers. Materials and methods: Using a dataset consisting of 415 primary and middle school Italian teachers, the analysis tested for the mediating role of self-efficacy between collective efficacy and work ability. Results: Mediational analysis highlights that teachers’ self-efficacy totally mediates the relationship between collective efficacy and perceived work ability. Conclusion: Results of this study enhance the theoretical knowledge and empirical evidence regarding the link between teachers’ collective efficacy and self-efficacy, giving further emphasis to the concept of collective efficacy in school contexts. Moreover, the results contribute to the study of well-being in the teaching profession, highlighting a process that sustains and promotes levels of work ability through both collective and personal resources. Keywords: collective efficacy, mediation, self-efficacy, teachers, work abilit
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
Can mindfulness mitigate the energy-depleting process and increase job resources to prevent burnout? A study on the mindfulness trait in the school context
Full text linkBackgroundPast studies in the teaching context provided evidence of the role of mindfulness-based intervention in improving occupational wellbeing. This study aims to increase the extant knowledge by testing the mechanism that links teachers’ mindfulness at work to occupational wellbeing. Rooted in the job demand–resource model, the mindfulness trait is conceptualized as a personal resource that has the ability to impact and interact with job demands and resources, specifically workload stress appraisal and perceived meaningfulness of work, in affecting teachers’ burnout.MethodsA sample of primary, middle, and secondary school teachers (N = 605) completed a questionnaire that aimed to assess teachers’ mindfulness trait and the measures of the quality of occupational life in the school context. Confirmatory factor analysis (CFA) was conducted to test the model fit indices; further analyses were performed to test the hypotheses about mediation and moderation effects.ResultsThe CFA showed good model fit indices. Further analyses highlighted that teachers’ mindfulness is negatively associated with workload stress appraisal and that positively influenced work meaning, in turn mediating the relationship between mindfulness and burnout. Finally, mindfulness moderated the effect of workload stress appraisal on burnout.ConclusionsRooted in the job demand–resource model, this study emphasizes an underrepresented personal resource, that is, the mindfulness trait at work, and the links that favor its impact on burnout. Practical and future research implications are also discussed.</div
Pantothenate kinase-associated neurodegeneration: Novel mutations in the PANK2 gene in an Argentinean young woman
Full text linkNeurodegeneration with brain iron accumulation (NBIA) refers to a heterogeneous group of disorders.1–3 The pantothenate kinase-associated neurodegeneration (PKAN) is an autosomal recessive disorder caused by defective iron metabolism associated with mutations in the pantothenate kinase 2 (PANK2) gene on chromosome 20p13–p12.3.Fil: Gatto, Emilia Mabel. Instituto de Neurociencias Buenos Aires; ArgentinaFil: Etcheverry, Jose L.. Instituto de Neurociencias Buenos Aires; ArgentinaFil: Converso, Daniela Paola. Universidad de Buenos Aires. Facultad de Medicina. Hospital de Clínicas General San Martín. Laboratorio de Metabolismo del Oxígeno; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Bidinost, Carla. Universidad de Buenos Aires. Facultad de Medicina. Hospital de Clínicas General San Martín. Laboratorio de Metabolismo del Oxígeno; ArgentinaFil: Rosa, Alberto Luis. Universidad de Buenos Aires. Facultad de Medicina. Hospital de Clínicas General San Martín. Laboratorio de Metabolismo del Oxígeno; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentin
Hypoxia induces complex I inhibition and ultrastructural damage by increasing mitochondrial nitric oxide in developing CNS
Full text linkNO-mediated toxicity contributes to neuronal damage after hypoxia; however, the molecular mechanisms involved are still a matter of controversy. Since mitochondria play a key role in signalling neuronal death, we aimed to determine the role of nitrative stress in hypoxia-induced mitochondrial damage. Therefore, we analysed the biochemical and ultrastructural impairment of these organelles in the optic lobe of chick embryos after in vivo hypoxia- reoxygenation. Also, we studied the NO-dependence of damage and examined modulation of mitochondrial nitric oxide synthase (mtNOS) after the hypoxic event. A transient but substantial increase in mtNOS content and activity was observed at 0-2 h posthypoxia, resulting in accumulation of nitrated mitochondrial proteins measured by immunoblotting. However, no variations in nNOS content were observed in the homogenates, suggesting an increased translocation to mitochondria and not a general de novo synthesis. In parallel with mtNOS kinetics, mitochondria exhibited prolonged inhibition of maximal complex I activity and ultrastructural phenotypes associated with swelling, namely, fading of cristae, intracristal dilations and membrane disruption. Administration of the selective nNOS inhibitor 7-nitroindazole 20 min before hypoxia prevented complex I inhibition and most ultrastructural damage. In conclusion, we show here for the first time that hypoxia induces NO-dependent complex I inhibition and ultrastructural damage by increasing mitochondrial NO in the developing brain.Fil: Giusti, Sebastián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Biología Celular y Neurociencia "Prof. Eduardo de Robertis". Universidad de Buenos Aires. Facultad de Medicina. Instituto de Biología Celular y Neurociencia; ArgentinaFil: Converso, Daniela Paola. Universidad de Buenos Aires. Facultad de Medicina. Hospital de Clínicas General San Martín; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay; ArgentinaFil: Poderoso, Juan J.. Universidad de Buenos Aires. Facultad de Medicina. Hospital de Clínicas General San Martín; ArgentinaFil: Fiszer, Sara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Biología Celular y Neurociencia "Prof. Eduardo de Robertis". Universidad de Buenos Aires. Facultad de Medicina. Instituto de Biología Celular y Neurociencia; Argentin
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