Search results for " role"
showing 10 items of 359 documents
Rolewicz-type chaotic operators
2015
In this article we introduce a new class of Rolewicz-type operators in l_p, $1 \le p < \infty$. We exhibit a collection F of cardinality continuum of operators of this type which are chaotic and remain so under almost all finite linear combinations, provided that the linear combination has sufficiently large norm. As a corollary to our main result we also obtain that there exists a countable collection of such operators whose all finite linear combinations are chaotic provided that they have sufficiently large norm.
Analysing tasks for the Flipped Classroom from the perspective of Realistic Mathematical Education
2018
International audience; The advent of Flipped Classroom as a framework for organizing the teaching and learning of mathematics has the potential to revitalize the attention to tasks as a vehicle for meaningful learning in tertiary education. Flipped Classroom is based on the idea of student active learning under close guidance of the university teacher. Due to the possibility to engage the students in meaningful discovery of how mathematics can relate to real-life situations during in-class sessions, the tasks are seen to have a central role in a successful implementation of Flipped Classrooms. This paper explores the realistic mathematics education (RME) as a theoretical framework for task…
Family Register in British English: The First Approach to its Systematic Study
2015
The present study looks into an unexplored area of research as it is the family register. An alternative to recording family conversations is the use of popular TV series, as their success lies in the audience s identification with their characters and their communicative style. This work analyses two highly popular series in UK. The results suggest that this register has its own communicative richness and internal variation, the knowledge of which may be of great help for students and professionals travelling to English-speaking countries and living or relating with native speakers in family environments.
Il lato oscuro della leadership: Framework concettuale e contributo esplorativo
2015
Introduzione: La letteratura sulla leadership, storicamente, si è focalizzata sugli elementi che rendono la relazione capo-collaboratore efficace, cercando di individuare i fattori funzionali a una leadership di successo, dedicando poco spazio a una riflessione su cosa rende un leader inefficace o distruttivo. Solo di recente, diversi studiosi hanno provato a fare chiarezza sul tema del lato oscuro della leadership, proponendo diversi costrutti, come ad esempio “leader repulsivo” (Pearce e Sims, 2002), “leader bullo” (Ferris, 2007), “leader tossico” (Lipman-Blumen, 2005), “manager compromesso” (Lubit, 2004). Tuttavia queste ed altre definizioni sono spesso orientate solo su alcuni comportam…
Dual role of epoxide hydratase in both activation and inactivation of benzo(a)pyrene.
1977
The effect of epoxide hydratase upon the mutagenicity of benzo(a)pyrene was investigated using two Salmonella typhimurium strains (TA 1537 and TA 98). These two bacterial strains were found to differ characteristically in their susceptibility to different mutagens biologically produced from benzo(a)pyrene providing a diagnostic tool to investigate which types of mutagenic metabolites were produced in various metabolic situations. The results showed that the pattern of mutagenic metabolites produced by microsomes from methylcholanthrene-treated mice was very different from that produced by microsomes from phenobarbital-treated or untreated mice. However in all cases at least two mutagenic me…
Hydraulic kinetics of the graft union in different Olea europaea L. scion/rootstock combinations
2007
The hydraulic resistance of young olive trees grafted on rootstocks with contrasting size-controlling potential was measured 30, 90, 360 and 480 days after grafting. Olive (Olea europaea L.) clones inducing plant vigorous growth (Leccino ‘Minerva’, LM) or dwarfing (Leccino ‘Dwarf’, LD) were studied in different scion/rootstock combinations (LD/LD, LD/LM, LM/LD, LM/LM). Plants growing on LD root systems developed lower leaf surface areas (about 50% less) than plants grafted on LM rootstocks. Graft union represented the largest fraction (up to 85%) of whole-plant hydraulic resistance 30 days after grafting, and still represented an important fraction of it 2 months later (40–55%). Four-hundre…
Linking transformational leadership to nurses’ extra-role performance: the mediating role of self-efficacy and work engagement
2011
salanova m., lorente l., chambel m.j. & martinez i.m. (2011) Linking transformational leadership to nurses’ extra-role performance: the mediating role of self-efficacy and work engagement. Journal of Advanced Nursing 67(9), 2256–2266. Abstract Aims. This paper is a report of a social cognitive theory-guided study about the link between supervisors’ transformational leadership and staff nurses’ extra-role performance as mediated by nurse self-efficacy and work engagement. Background. Past research has acknowledged the positive influence that transformational leaders have on employee (extra-role) performance. However, less is known about the psychological mechanisms that may explain the lin…
Measuring Meaning
2021
This study will present a tool designed for meaning extraction with monoclausal sentences in Italian. Its main features will be illustrated with instances of the Italian causative clause type featuring the verb fare ‘make’ (e.g. Egli fa piangere il bambino ‘He makes the child cry’), a construction which invariably embeds a clause (e.g.Il bambino piange ‘The child cries’) with which it establishes an entailment relationship. The tool automatically accomplishes the following tasks: it answers relevantwh- questions (e.g. Who cries? Who makes someone cry?) and detects the entailment. Concurrent with this presentation, this study will also encourage a reflection on the research currently being c…