Search results for "reserva"

Call Admission Control in Single and Two-Tier Cellular Networks

2010

We consider four strategies for call admission control (CAC) in single and two-tier cellular networks, which are designed to ensure advantage of handover calls: dynamic redundancy (cutoff priority scheme), partial dynamic redundancy (fractional guard channel scheme), static redundancy (rigid division-based CAC scheme) and restriction of the number of new calls admitted (new call bounding scheme). We show the advantage of dynamic reservation by numerical analysis. We strictly prove it in the case of two-channel system with losses.

No Reservations Required: Achieving Fairness between Wi-Fi and NR-U with Self-Deferral Only

2021

Wireless technologies coexisting in unlicensed bands should receive a fair share of the available channel resources, even when they use different access methods. We consider the problem of coexistence between Wi-Fi and New Radio Unlicensed (NR-U) nodes, which employ, respectively, a random and scheduled access scheme. The latter typically resorts to reservation signals (RSs), which allow keeping the control of the channel until the start of the next synchronized slot. This mechanism, although effective for increasing the channel access opportunities of scheduled-based nodes, is also a waste of channel resources. We investigate alternative solutions, based on self-deferral only. We built ana…

Preliminary Results on Carrizo Citrange Synthetic Seeds Dessiccation and PVS2-Vitrification as Pre-Treatments To Cryopreservation

2011

Simple techniques suitable for long-term storage of Plasmopara viticola

2006

Summary. Propagules of Plasmopara viticola or fragments of P. viticola infected host tissue were stored by three techniques, freezing at –25°C, dehydration with CaCl2, and freeze-drying. Viability tests were performed periodically until exhaustion of the testing sample. P. viticola samples that were frozen at -25°C remained viable for eight years, whereas the CaCl2 dehydrated samples remained viable for eight and a half years. Freeze-drying was the most successful long-term storage method, being able to preserve samples for almost 21 years.

EFFECTS OF CITRUS ESSENTIAL OILS ON THE MICROBIOLOGICAL SAFETY OF PRIMO SALE CHEESE

In the last years, the consumers demanding foods with no chemical preservatives for food conservation, determined an interest by the food industries for the use of natural biopreservatives. Several essential oils from various plants and fruits have been characterized for their antibacterial activities in order to select new biopreservatives. The aim of this work was to evaluate the organoleptic effect of citrus essential oils to be applied in the processing of sheeps’ milk “Primo Sale” cheese and the inhibitory effect on the main bacterial pathogens of dairy interest. In order to better evaluate the antibacterial effect, the first approach was based on pasteurized milk, in view of the futur…

Conservation of forest biodiversity in Sicily: contribution of the University of Palermo Germplasm Bank (Italy)

2017

Germplasm Banks dedicated to the wild plants seeds conservation play a unique role in integrating the in situ conservation of endemic, rare or endangered plant species. One of the missions of the Seed Bank of the University of Palermo (HBP-Bank) is to support the conservation of biodiversity with particular attention to the spectrum of genetic diversity of plants belonging to Mediterranean habitat. Abies nebrodensis (Lojac.) Mattei is an relict species, consisted of 30 natural individuals, gathered in a small area of the Madonie Natural Park in Sicily (1500 -1600 m above s.l.), recorded on the checklist “TOP 50 Mediterranean Island Plants”. It is also one of eight conifers species criticall…

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…

COLLECTION, PROCESSING, PRESERVATION AND TRADING OF WILD EDIBLE MUSHROOMS

2013

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.

Wooden churches in Lithuania : analysis of failures and degradations, guidelines for restoration

2016

La maggior parte degli edifici di culto in legno lituani versa in una penosa condizione di degrado, poiché le comunità locali non sempre rivolgono la dovuta attenzione ai fenomeni di dissesto e degrado e spesso le competenze tecniche capaci di salvaguardare tale patrimonio sono andate perdute. Le cause più frequenti di questo stato di fatto derivano da una inadeguata manutenzione (sia ordinaria che straordinaria), dal deterioramento del legno (ascrivibile per lo più ad infestazioni di funghi e insetti) o da dissesti e stati deformativi delle strutture dovuti ad errori nella tecnica costruttiva o all’errato dimensionamento delle sezioni costitutive degli elementi di base delle singole unità …