Search results for "edge"

How a traditional agricultural protection structure acts in conditioning the internal microclimate: a statistical analytical approach to Giardino Pan…

2014

This work aims to analyze the traditional agricultural technique of the Giardino Pantesco, typical of the isle of Pantelleria (Sicily, Italy). With this particular technique a single citrus tree is encircled by a drywall of volcanic rocks allowing it to grow even in the island's unfavorable meteorological conditions. This technique has been analyzed by placing one instrumental array inside the Giardino and one outside and by measuring different environmental variables. The aim of the work is therefore to understand what is the drywall's effect on the tree by analyzing the time series produced by the sensors, using cross-correlation techniques and reducing the series' autocorrelation, so tha…

Traditional use of wood in Sicily

2020

The results of a multidisciplinary survey on the use of wood in Sicily are presented here. This research, based on a thorough review of the information available from numerous sources, mostly related to Socio-economic Sciences and Humanities, sheds light on the lasting, widespread and diversified use of many tens of woody species - native and cultivated - growing on the island. This work represents an initial contribution to a topic largely overlooked the national and regional literature concerning forest sciences and wood technology. Contrariwise, the very precise information available on the specific uses of wood from certain Sicilian woody species clearly testifies to the profound knowle…

Ecological infrastructures in a vineyard of West Sicily

2008

GoMilkSicily: an opportunity for transfer of knowledge

2006

Schede per la flora ornamentale siciliana. 61-67

2013

With the aim to improve the knowledge of the ornamental flora of Sicily, a series of reports on the most rare and significant species found in the historic or public gardens and parks has been started since 2001. The plants taken in consideration are examined as far as taxonomy, geographical origin, biology, ecology are concerned, also taking into account their condition in Sicily with respect to introduction, sanitary status, occurrence, etc... Furthermore, germplasm conservation is, when possible, provided in the Botanical Garden of Palermo. Each taxon is treated in a single report. Here the reports 61-67, by F. Argento, M.R. Cucco, E. Di Gristina & R. Oliveri, are presented. These concer…

Schede 27/36. In: Schicchi, R, Raimondo, FM. Schede per il censimento degli alberi monumentali di Sicilia 27-36.

2012

Sicilian monumental trees reports. 27-36. – The reports 27-36 concerning unpublished monumental trees surveyed in Sicily are here presented. They are: the Almond tree of Rifesi Santuary [Prunus dulcis (Mill.) D. A. Webb var. dul- cis]; the Ash tree (Fraxinus angustifolia Vahl subsp. angustifolia) in Alefina land and Tusa country; the Olive trees (Olea euro- paea L. subsp. europaea var. europaea) in the following lands: Murro, Fontecà and Serra Bruno; the largest Apple tree of Crescimanno (Malus crescimannoi Raimondo) and the Hawthorn tree (Crataegus monogyna Jacq.) of Piano Menta; the Willow tree of Mangalaviti Homes (Salix alba L. subsp. vitellina ) and the Common Yew of Tassita Wood (Tax…

Schede per il censimento degli alberi monumentali di Sicilia. 37-43

2013

The reports 37-50 concerning unpublished monumental trees sur- veyed in Sicily are here presented. They are: the Cherry tree of Ciccio Faranda, the Almond tree of Corte del Sole [Prunus dulcis (Mill.) D. A. Webb var. dulcis], the Olive trees (Olea europaea L. var. europaea) in the following lands: Innari, Maviti, Misilmeri and Favorita Park; the Common pear (Pyrus communis L.) of the Pistacchiera.

Vacuum-ultraviolet absorption of amorphous SiO2: intrinsic disorder and role of silanol groups

2008

We present a study on the vacuum-ultraviolet VUV absorption properties of amorphous SiO2 a-SiO2 with high concentrations of silanol groups Si-OH . We found that the absorption spectra are made up of a couple of exponential profiles. The first, in the range from 7.5 to 8.1 eV, was attributed to Si-OH group absorption, while the second, in the range from 8.1 to 8.25 eV, was ascribed to the intrinsic absorption. The VUV absorption cross section of Si-OH groups in a-SiO2 was determined as well. The intrinsic absorption was found to be affected by the Si-OH concentration: high silanol group contents allow lower values of the Urbach energy. This result is interpreted in terms of a reduction in th…

Sturctural disorder and silanol groups content in amorphous SiO2

2009

We present a study on the features of the Urbach edge in amorphous silicon dioxide a-SiO2 . The effects of temperature on the absorption edge in the range from 4 to 300 K were studied in both materials having negligible dry, 1017 cm−3 and significant wet, 1019 cm−3 silanol groups contents. Remarkable differences in the values and in the temperature dependence of the Urbach energy in the dry and wet samples were observed. These differences are interpreted as a consequence of a drastic reduction in the degree of disorder in wet materials, which turn out to be characterized by an electronic structure more similar to that of crystalline quartz. Furthermore, our results indicate that silanol gro…

The submerged structure and stratal architecture of the Neapolitan Yellow Tuff (NYT) caldera, offshore the Campi Flegrei, (Eastern Tyrrhenian Margin)…

2012

The Campi Flegrei is an active volcanic area defined by a quasi-circular depression that covers some 200 km2 of the coastal zone of SW Italy, a large part of which develops off the Naples (Pozzuoli) Bay (Fig. 1). The area has been active at least since 60 ka BP ( Pappalardo et al., 1999), and is structurally dominated by a caldera, 6 km in diameter, associated with the eruption of the Neapolitan Yellow Tuff (NYT), a 40 km3 Dense Rock Equivalent (DRE) ignimbrite (Scarpati et al., 1993) dated at ca 15 ka BP (Deino et al., 2004), that covered the district now occupied by the city of Naples, the Campi Flegrei and a large area of the continental shelf off the Pozzuoli Bay. The volcanological evo…