Search results for "Hard"

Study of energetic properties of different tree organs in six Olea europaea L. cultivars

2021

AbstractPruning is an important horticultural practice for the management of olive orchards (Olea europaea L.) that generates a considerable amount of residues every year. Olive orchards are increasingly expanding beyond the Mediterranean Basin to new growing Countries (Australia, California, Argentina, Chile and Uruguay) and this will certainly lead to larger availability of pruning material. Currently, the interest in use of olive tree pruning residues for energy purposes is increasing but unfortunately, the information on the differences among organs of the tree, in terms of calorific value and ash content, is scarce. Another unknown aspect is the effect of cultivar vigour on dry matter …

Modeling olive ecophysiological response to soil water deficit.

2011

Assessment of the Vegetation Parameters of Almond and Vine Plants for Designing a Compact Tractor

2018

The aim of this research is to assess the vegetation parameters of almond and vine plants, aimed at designing a compact tractor suitable for these orchards. The research is part of the Italian project TRACLAS, involving the Universities of Palermo, Milan, Bari, “Tuscia” of Viterbo and Agricultural Research and Economics - Research Unit for Agricultural Engineering (CREA-ING) of Treviglio (Bergamo). Based on the results of the surveys carried out in a sample of almond and vine farms, it was possible to define the vegetation parameters that will allow to design a very low and narrow tractor equipped with a fixed ROPS and suitable for these orchards.

First data on the repellent activity of essential oils of Citrus limon towards medfly (Ceratitis capitata)

2012

The biological activity of peel essential oils of two Sicilian cultivars of C. limon, ‘Interdonato’ and ‘Lunario’, was investigated by electrophysiological recordings (EAG) and field trials on Ceratitis capitata (Wiedemann) (Diptera Tephritidae). The EAG data showed a remarkable dose-response relationship and a low activation threshold dose (10-3M) for both essential oil extracts. In field tests, essential oils showed a good repellent and antiovipositional activi- ty on ‘Navelina’ oranges, and in particular the essential oils of ‘Lunario’ pro- vided the same results of kaolin. Potential applications of essential oils from C. limon cultivars against C. capitata in organic farming are discuss…

Primi studi sulla biologia e sul controllo di Cydia funebrana (Treitschke) in susineti biologici siciliani

2011

First studies on biology and control of Cydia funebrana (treitschke) in Sicilian organic plum orchards. Cydia funebrana (Treitschke), considered the key pest in the Sicilian plum orchards. Few studies were carried out in Sicily concerning C. funebrana life cycle, forecasting models and the effectiveness of some products permitted in organic plum orchards. In 2010 researches were carried out in three Sicilian plum orchards, two in Palermo Province (Monreale and San Giuseppe Jato) and one in Agrigento Province (Castrofilippo), in order to monitor the population, to evaluate damage levels caused by the plum moth and to estimate how many generations it could complete by Charmillot’s forecasting…

FACTORS AFFECTING THE INFESTATION DUE TO BACTROCERA OLEAE (ROSSI) IN SEVERAL SICILIAN OLIVE CULTIVARS

2010

Mytilococcus gloverii (Packard) (Homoptera: Diaspididae) parasitism by Encarsia herndoni Girault (Hymenoptera: Aphelinidae) twenty years after its in…

2009

X-Ray microcalorimeter detectors - Technology developments for high energy astrophysics space missions

2020

Improvements in the design, fabrication, and performance of astronomical detectors has ushered in the so-called era of multi messenger astrophysics, in which several different signals (electromagnetic waves, gravitational waves, neutrinos, cosmic rays) are processed to obtain detailed descriptions of their sources. Soft x-ray instrumentation has been developed in the last decades and used on board numerous space missions. This has allowed a deep understanding of several physical phenomena taking place in astrophysical sources of different scales from normal stars to galaxy clusters and huge black holes. On the other hand, imaging and spectral capabilities in the the hard x-rays are still la…

Hardening structures isolated by double sliding devices: Seismic reliability-based design approach

2019

This study deals with seismic reliability-based design (SRBD) relationships in terms of behavior factors and displacement demands for hardening structures equipped with double friction pendu-lum system (DFPS) bearings. An equivalent 3dof system having a hardening post-yield slope is adopted to describe the superstructure behavior, whereas velocity-dependent laws are assumed to model the responses of the two surfaces of the DFPS. The yielding characteristics of the super-structures are defined for increasing behavior factors in compliance with the seismic hazard of L’Aquila site (Italy) and with NTC18 assuming a lifetime of 50 years. Considering several natural seismic records and building p…

È un paesaggio?

2015

Il paesaggio è concreto o astratto? È materiale o immateriale? Si può toccare o si può solo vedere… o forse si può solo pensare o immaginare? È solo una esperienza estetica? È utile? È naturale o è anche artificiale? È una costruzione culturale? Come se ne fa l’esperienza… ognuno per sé o collettivamente… standosene a casa, in un museo, o all’interno del paesaggio stesso? Chi vede il paesaggio e chi no? Il contadino o lo scienziato? O nessuno dei due?... A partire da queste domande vengono confrontati frammenti di teorie e riflessioni di alcuni speciali studiosi, sulle quali posizioni trasversali poter impostare un discorso attuale sul riconoscimento e la trasformazione del paesaggio: Luciu…