Search results for "vol"
showing 10 items of 19880 documents
Kinetics of phase separation in thin films: Lattice versus continuum models for solid binary mixtures
2008
A description of phase separation kinetics for solid binary (A,B) mixtures in thin film geometry based on the Kawasaki spin-exchange kinetic Ising model is presented in a discrete lattice molecular field formulation. It is shown that the model describes the interplay of wetting layer formation and lateral phase separation, which leads to a characteristic domain size $\ell(t)$ in the directions parallel to the confining walls that grows according to the Lifshitz-Slyozov $t^{1/3}$ law with time $t$ after the quench. Near the critical point of the model, the description is shown to be equivalent to the standard treatments based on Ginzburg-Landau models. Unlike the latter, the present treatmen…
Vinificazione in bianco in presenza di chips di quercia di origine e livello di tostatura diversi
2011
Some musts from Grillo grapes, a cultivar autochthonous of western Sicily, fermented with medium toasted American oak chips or with non toasted French oak chips (Classic Line – HTS enology) have been vinified. the wines were significantly different as regards the contents in volatile and non volatile compounds extracted from American and French oak chips. a slight increase in alcoholic fermentation rate and in some cases a higher content of ethyl esters and medium chain fatty acids, were observed in musts charged with chips, independently of their origin. In wines obtained from musts charged with french medium toasted oak chips, the content in furans was higher (5-methylfurfural, trans-meth…
Habitat area and local habitat conditions outweigh fragmentation effects on insect communities in vineyards
2022
Fragmentation of habitat, for example by intensive agricultural practices, can be detrimental to local biodiversity. However, it often remains unclear whether such biodiversity declines are caused by loss of habitat area or increased fragmentation, and how habitat quality factors into it. In our study system, vegetated vineyards are typically small, and isolated from one another, potentially limiting the distribution and dispersal of organisms. In a full-factorial experiment of a priori selected vegetated vineyard patches of differing size and fragmentation, we aimed to disentangle the effects of habitat area (area of vegetated vineyards), habitat fragmentation (number of vegetated vineyard…
Learn to Cache: Machine Learning for Network Edge Caching in the Big Data Era
2018
The unprecedented growth of wireless data traffic not only challenges the design and evolution of the wireless network architecture, but also brings about profound opportunities to drive and improve future networks. Meanwhile, the evolution of communications and computing technologies can make the network edge, such as BSs or UEs, become intelligent and rich in terms of computing and communications capabilities, which intuitively enables big data analytics at the network edge. In this article, we propose to explore big data analytics to advance edge caching capability, which is considered as a promising approach to improve network efficiency and alleviate the high demand for the radio resou…
Creating and maintaining social networks: women’s participation in Basque pilota. [Creación y mantenimiento de redes sociales: participación de mujer…
2015
Basque pilota is a traditional sport played mainly by men. A project emerged in 2005 to promote female participation: Emakumea Pilotari (Woman pelota player). In this article we present the main points that emerged from an ethnographic study of the social relationships that playing Basque pilota can provide. The study was carried out in 2011-2012 season with a purposive sample of 28 adult women Basque pilota players (pilotaris) (between 22 and 60 years old). 26 participants were pilotaris in recreational groups and the other two were their trainers. The results suggest that a sense of community, team membership, the development of a general reciprocity and group security are the most import…
Low mimosine content and nutrient-rich foliage of two Leucaena leucocephala varieties: a potential fodder resource in Mediterranean agroforestry syst…
2022
Leucaena leucocephala is worldwide used for wood production, reforestation and for feeding livestock. To assess the potential use of leucaena for animal nutrition, we analysed the composition of methanolic extracts of leaf samples of two varieties occurring in Sicily (Mediterranean area), also determining the presence of mimosine.
Work commitment and engagement in south Italian volunteers
2009
Objectives. Recent research on volunteering has increased its interest in integrating different theoretical models such as motivational and socio-psychological ones. The current research replicates and extends a Swiss survey (Guntert, 2008) among a sample of Italian volunteers. The aim was to examine the antecedents (mainly in terms of motivational factors and identification) of outcomes such as commitment and engagement towards volunteering. Methods. To examine these antecedents and the outcomes, a questionnaire was administered to a sample of 165 young Italian adults who were engaged in various voluntary associations in south Italy (Campania and Sicilia). Results. Our analyses, underlinin…
Teachers’ Emotional Intelligence, Burnout, Work Engagement, and Self-Efficacy during COVID-19 Lockdown
2023
Teachers’ psychological well-being is a crucial aspect that influences learning in a classroom climate. The aim of the study was to investigate teachers’ emotional intelligence, burnout, work engagement, and self-efficacy in times of remote teaching during COVID-19 lockdown. A sample of 65 teachers (Mage = 50.49), from early childhood through lower secondary education, were recruited during a period of school closure to answer self-report questionnaires and other measures assessing study variables. Results showed that during the COVID-19 pandemic, teachers reported higher levels of burnout and lower levels of self-esteem due to multiple challenges related to remote teaching and …
Formare educatori e insegnanti ludici
2020
Che cosa significa “formare insegnanti ed educatori ludici”? Partendo dal significato del termine “Ludico”, il saggio approfondisce in cosa consista la “capacità di giocare” con i bambini e di promuovere il loro gioco libero. Propone quindi una riflessione riguardo ad ambiti, percorsi e metodologie per la formazione sottolineando come questa debba essere caratterizzata: da un apprendimento centrato sull’esperienza, sull’osservazione e sull’auto-osservazione; dalla dimensione di gruppo; dalla interazione tra pari, da attività focalizzate sui linguaggi artistico-espressivi; da un’attenzione alla dimensione psico-corporea ed emotiva. Nella parte conclusiva viene presentato un possibile modello…
Recognizing Video Resolution by Monitoring Memory Metrics in Mobile Clients
2019
Content delivery is one of the most successful applications in mobile networks. Mobile edge servers are significantly contributing to the improvement of this type of applications, by also performing resolution adaptations as a function of the radio link quality observed by the users. In this paper, we face the problem of dynamically tracking the perceived video resolution by mobile clients in a mobile edge environment to guarantee an agreed Service Level Agreement (SLA). To this purpose, we propose a protocol-agnostic approach, based on monitoring some memory metrics of a running video streaming process at the mobile client, for identifying the time-varying resolution of the video content.