Search results for "69"
showing 10 items of 1106 documents
The cork oak in the Mountains of Palermo (Italy): ecological insights from the south-eastern edge of its distribution range
2020
Abstract: The uneven presence of the cork oak (Quercus suber L.) within its distribution range is not only determined by its climatic requirements but also by specific edaphic needs. Although most of the natural populations thrive in acidic soils deriving from metamorphic or volcanic rock outcrops, some cork oak populations are found growing in soils deriving from calcareous bedrock, which are considered less suitable. We carried out a multidisciplinary investigation at the south eastern edge of the Q. suber distribution range (Mountains of Palermo, NW Sicily), including soil, floristic, and vegetation surveys, aimed at: (i) assessing the native or introduced origin of some peculiar cork oa…
Could cattle ranching and soybean cultivation be sustainable? A systematic review and a meta-analysis for the Amazon
2021
Abstract: Tropical forests are being destroyed to make space for agricultural activities with the assumption that they are required to feed the growing global population. Consequently, more sustainable practices are needed to guarantee food security and environmental protection of highly threatened natural biodiversity hotspots like the Amazon rainforest. Cattle ranching and soybean cultivation are by far the greater drivers of land use change and deforestation in the Amazon region. We performed a systematic review of papers related to these two main drivers and a meta-analysis on the effects of sustainable practices on different ecosystem services. The results of the review highlight a lar…
Diagnostic Multidisciplinary Investigations for Cultural Heritage at Etna Volcano: A Case Study from the 1669 Eruption in the Mother Church at the Ol…
2022
Misterbianco is located on the southern flank of Mt. Etna (Unesco site), in eastern Sicily (Italy). This site, also known as Monasterium Album, has a long and tormented history linked with volcanic activity of Mt. Etna and regional seismicity. This site received much attention in the 2000s when excavation works brought to light a 14th century church remains below the thick layer of the 1669 lava. This study documents the first diagnostic multidisciplinary survey performed at this site 350 years after the eruption: the investigations were performed by using techniques such as ground-penetrating radar, infrared thermography, a terrestrial laser scanner and a drone survey to analyze the site’s…
La ricostruzione delle crociere della sala colonnare del castello Maniace di Siracusa dopo il terremoto del 1693
2013
Costruito nella prima metà del XIII secolo per conto dell’imperatore Federico II, il castello Maniace di Siracusa concentra il suo enigma nella vasta sala colonnare (che era composta da venticinque crociere quadrate) e nei criteri costruttivi adottati per la sua realizzazione. Recenti ricerche sul campo e un’attenta rilettura documentaria del “progetto di restauro” post terremoto del 1693 hanno offerto nuovi strumenti utili a comprendere specifiche tecniche e procedure esecutive dell’intero organismo. Si è potuto così dimostrare che la differenza materica delle coperture (pietra calcarea bianca e lavica) è, in realtà, prodotto degli interventi di ricostruzione. Il nodo costruttivo, che la s…
Modello numerico per la simulazione e l’ottimizzazione di controlli non distruttivi con ultrasuoni
2013
I controlli non distruttivi basati sull’impiego di ultrasuoni sono ampiamente usati per la loro efficacia e affidabilità nel rilevamento di difetti. La generazione di onde ultrasonore e la propagazione in strutture di forma non regolare sono difficili da analizzare, soprattutto se la sorgente impiegata è un laser. Le tecniche numeriche per la simulazione del fenomeno reperibili in letteratura mostrano limiti di applicabilità per frequenze nel campo dei MHz e lunghezze d’onda molto corte. In questo lavoro presentiamo un metodo numerico in grado di risolvere accuratamente ed efficientemente problemi di generazione di onde ultrasonore tramite laser, con frequenze nel range dei MHz, e di propag…
Manuel Vázquez Montalbán y sus heterónimos en la revistra "Triunfo"
2022
The volume collects and analyzes the collaborations of Manuel Vázquez Montalbán in the magazine Triunfo, from the opinion article, to the report, from the short story to the comic strip, focusing on the use of heteronomous words. Following the path of the genre, the style and the narrative perspectives of the different contributions, the fertile osmosis between literary discourse and journalistic discourse is thus verified. The weekly appeared in 1946 in Valencia, playing a role of theater and film information and criticism. Since its transfer to Madrid in 1948, the magazine expanded its interests, inserting articles on domestic and foreign policy, until, in the 1960s, it became the intelle…
Percentile values of the standing broad jump in children and adolescents aged 6-18 years old
2020
The standing broad jump (SBJ) is a valid, reliable and feasible field-based test, which can evaluate explosive strength of the lower limbs and physical fitness. This study aimed to provide normative data for the SBJ for male and female children and adolescents and describe differences in performance between age groups and genders. A total number of 2140 children and adolescents, sampled in seven European nations have been included for analysis. The SBJ was performed to derive percentile values for gender and each age group. In general, males have greater jumping performance compared to females. Data demonstrate a linear increase in the jumping distance for both males and females until adole…
Il problem solving aritmetico: analisi dei processi cognitivi e metacognitivi e illustrazione del software "Risolvere problemi aritmetici"
2010
Il presente contributo esamina la letteratura relativa al problem solving matematico ed illustra uno strumento multimediale per la soluzione dei problemi aritmetici in bambini del secondo ciclo della scuola primaria e in bambini che presentano difficoltà in tale area. Il software presenta sia un modulo test, in cui vengono presentati problemi aritmetici di livello di difficoltà crescente, che un modulo di training. Il training è stato elaborato in base alle più recenti ricerche nell’area del problem solving matematico e prevede attività sulla comprensione, rappresentazione, categorizzazione e pianificazione del problema. Il training prevede inoltre particolari attività che stimolano l’uso d…
The use of Technology in the promotion of Children's Emotional Intelligence: The multimedia program "Developing Emotional Intelligence"
2018
"Developing Emotional Intelligence” is an Italian language multimedia tool created for children between 8 and 12 years of age. The software is based on the four ‘branches’ of model of emotional intelligence proposed by Mayer and Salovey and aims to evaluate and improve abilities in perception of emotions; using emotion to facilitate thought; understanding emotions; and managing emotions. In the software, four characters represent the four branches of emotional intelligence and guide children through the ‘world of emotions’ using drawings, animations, music, sounds and verbal instructions. The software is comprised of two components, namely an assessment section (27 items) and a training sec…
On the hidden significance of differing micro-sites on tree-ring based climate reconstructions
2015
Tree-ring chronologies are commonly extended back in time by combining samples from living trees with relict material preserved in man-made structures or natural archives (e.g. lakes). Although spatially close, these natural archives and living-tree-sites often comprise different micro-climates. Inhomogeneous growth conditions among these habitats, which may yield offsets in growth-rates, require caution in data processing. Here we assess species-specific growth dynamics in two micro-habitats and their potential effects on long chronologies by combining tree-ring data from different living-tree-sites with an âartificialâ subfossil dataset. Well replicated (nâ>â80) Norway spruce (…