Search results for "CONTACT"

showing 10 items of 1003 documents

Semiochemical exploitation by two egg parasitoids,Trissolcus basalis and Trissolcus brochymenae (Hymenoptera: Scelionidae)

Chemo-orientation in egg parasitoids, a self-controlled movement in time and space, is led by volatile or substrate-borne chemicals distribution in the environment for purposes of locating host, food, mates and other resources. The perception of these chemical stimuli can be either from a distance by exploiting long-range infochemicals in the case of volatile chemoreception and/or upon contact with the cues when wasps are relatively close to the host in the case of contact chemo-reception by perceiving short-range infochemicals. In the present thesis, two different examples of chemo-orientation were treated. The first is an olfactory chemo-reception concerning Trissolcus basalis (Wollaston)…

Settore AGR/11 - Entomologia Generale E ApplicataVolatile cues substrate-borne cues contact olfaction sensilla Trissolcus basalis Trissolcus brochymenae.
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Endogenous and exogenous factors affecting host chemical footprint exploitation by a hymenopterous egg parasitoid

2014

During the host location process, parasitoids encounter and explore a great variety of volatile and contact semiochemicals from the host-plant complex. In the system Nezara viridula and its egg parasitoid Trissolcus basalis, when wasps land on a plant, they can taste chemical footprints left by walking adult hosts. These cues represent a set of indirect host-related contact kairomones that induce arrestment and motivated searching behavior, as they drive wasps in an area where there is a high probability of finding hosts but are not able to “promise” the presence of the suitable host stage. Patch time allocation is strongly modified by experience gained during foraging on host traces. In fa…

Settore AGR/11 - Entomologia Generale E Applicatasearching behavior Trissolcus basal is Nezara viridula contact kairomone
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UNA PROCEDURA AUTOMATIZZATA PER LA DETERMINAZIONE DELLE CARATTERISTICHE MICROSTRUTTURALI DELLE SABBIE MEDIANTE ANALISI DI IMMAGINI DI SEZIONI SOTTILI

2012

È ben noto che il comportamento meccanico microscopico delle sabbie - e in generale dei terreni granulari - trae origine dalle loro caratteristiche microstrutturali, quali, per esempio, il numero di coordinazione dei singoli grani, l’indice di contatto intergranulare (grain contact ratio) e l’indice di addensamento dei grani (packing density index). Appare, quindi, di notevole importanza la determinazione degli indici predetti con alto grado di affidabilità e di ripetibilità. Lo studio dell’assetto dei contatti intergranulari e il calcolo degli indici che lo caratterizzano, viene condotta comunemente su immagini piane dell’insieme di grani mediante esame visuale e restituzione grafica assis…

Settore ICAR/07 - GeotecnicaSettore ICAR/04 - Strade Ferrovie Ed AeroportiMicrostruttura Grain Contact Analisi di Immagini Tecniche di Segmentazione Packing Density Locked SandsMicrostructure Grain Contact Image Analysis Segmentation Techniques Packing Density Locked Sands.
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Electrochemical deposition of CIGS on electropolished Mo

2012

Settore ING-IND/23 - Chimica Fisica ApplicataCIGS Electrodeposition Mo Back-contact Solar Cells
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PMRs Utilizing Non–Pressure-Driven Membrane Techniques

2018

In the present chapter it is shown how photocatalytic membrane reactors utilizing membrane processes, which are not pressure driven, can exploit various mechanisms to obtain a substantial improvement of the process. The fundamentals of this particular type of membrane reactors are reviewed including the effects of the most important parameters and the methods and rules of coupling photocatalysis and membrane separation. The survey of the studies on photocatalytic membrane reactors (PMRs) utilizing pervaporation, dialysis, membrane contactors and membrane distillation offers the opportunity of discussing the advantages with respect to PMRs adopting pressure driven membrane processes. Indeed,…

Settore ING-IND/24 - Principi Di Ingegneria ChimicaMaterials scienceMembrane reactorFoulingbusiness.industrySettore ING-IND/25 - Impianti ChimiciDialysiMembrane distillationMembrane distillationequipment and suppliesphotocatalytic membranes photocatalysis photocatalytic membrane reactorsMembrane technologyMembranePervaporationMembrane reactorsSettore CHIM/07 - Fondamenti Chimici Delle TecnologiePervaporationProcess engineeringbusinessMembrane contactor
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Multi Stage Flash Desalination with Direct Mixing Condensation

2011

Multi Stage Flash desalination technology has been a leading technology in the desalination market for the last four decades. However as a result of the continuous increase of costs for the special materials required for the tube bundles the share of MSF technology in the market is nowadays steadily shrinking. Aim of the present work is to present a novel configuration for the MSF process. In the proposed arrangement evaporation occurs in a multi stage vertical column filled with packing material to enhance the achievement of flashing equilibrium in each stage, while condensation occurs in a second column through direct mixing with a colder water stream. Thermal integration for the recovery…

Settore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciDesalinationSettore ING-IND/25 - Impianti Chimicidirect contact condensation
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CFD simulations of dense solid–liquid suspensions in baffled stirred tanks: Prediction of the minimum impeller speed for complete suspension

2012

Abstract In the literature on mechanically agitated solid–liquid systems, several methods are described to estimate the minimum impeller speed Njs at which all particles are suspended, but few studies have been devoted so far to their critical comparative assessment [67] . In the present paper, several alternative Njs prediction methods are applied to CFD results obtained for selected test cases covering a broad range of suspension conditions and impeller speeds. Results are compared with one another and with classic empirical correlations [88] . The aim of the work is to assess the adequacy of different methods for predicting Njs and, more generally, to contribute to a viable CFD-based str…

Settore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciWork (thermodynamics)Engineeringbusiness.industrySettore ING-IND/25 - Impianti ChimiciGeneral Chemical EngineeringMixing (process engineering)Mechanical engineeringGeneral ChemistryMechanicsStirred tank Multi-fluid model Computational fluid dynamics Solid–liquid two-phase flow Complete suspension speed Sufficient suspension speed Unsuspended solids criterionComputational fluid dynamicsIndustrial and Manufacturing EngineeringControl volumeImpellerEnvironmental ChemistrySuspension (vehicle)Reynolds-averaged Navier–Stokes equationsbusinessContactorChemical Engineering Journal
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SALUTE E SICUREZZA NEI LUOGHI DI LAVORO: LE RISPOSTE INTEGRATE DEGLI ORDINAMENTI STATALE E INTERSINDACALE

2020

Il saggio analizza la risposta dell’ordinamento intersindacale all’emergenza epidemiologica da Covid-19 in materia di salute e sicurezza nei luoghi di lavoro attraverso una disamina del Protocollo del 24 aprile 2020, e delle prime applicazioni contrattualcollettive. Tecnicismi a parte, lo studio sottolinea come le misure pattuite dalle parti sociali specificano ed integrano gli obblighi inderogabili e generali di legge in materia di salute e sicurezza. Infine, il saggio si interroga sulla compatibilità tra meccanismi di contact tracing e privacy all'insegna di una prospettiva multi-livello. The essay focuses on the recent measures undertaken by social partners against Covid-19 in the field …

Settore IUS/07 - Diritto Del LavoroCovid-19 health and safety in the workplace industrial relations legislation contact tracing privacy.Covid-19 salute e sicurezza nei luoghi di lavoro relazioni industriali legge contact tracing privacy.
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Contatti culturali, identità e popolamento nel territorio imerese

2016

Il lavoro prende in considerazione il problema dei rapporti tra coloni greci e comunità indigene nel territorio di Himera, sulla base dei risultati della prospezione archeologica condotta per tre decenni nelle valli dei fiumi Imera settentrionale, Torto e S. Leonardo. Vengono esaminati gli elementi di cultura materiale che permettono di definire i modi dell'interazione culturale tra coloni e indigeni, nonché di ricostruire i paesaggi politici, socio-economici e il paesaggio del sacro nelle diverse aree indagate e nei diversi comprensori. La ricerca infatti permette di delineare, oltre alle usuali organizzazioni insediative e agricole della chora politiké e della éremos chora, anche articola…

Settore L-ANT/09 - Topografia AnticaSettore L-ANT/07 - Archeologia ClassicaThis work focuses on the problem of cultural contacts between Greek colonists and indigenous communities in the territory of Himera based on the results of the archaeological survey conducted for three decades in the valleys of the northern Imera Torto and S. Leonardo rivers. The elements of material culture that enable us to define the ways of cultural interaction between settlers and indigenous peoples as well as to reconstruct the political socio-economic and sacred landscapes in the various districts investigated are examined. In fact the research allows to outline in addition to the usual settlement and agricultural organizations of chora politiké and éremos chora articulated areas within the territory of Himera and to understand the landmarks of the rural settlement alongside the presence of highland settlements . Therefore the center-periphery approach is abandoned for a more articulated analysis demonstrating different forms of settlement and cultural contact in the three river valleys of the Himera hinterland.
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Strategies for conservation of a minority language. Between convergence and hybridization

2019

The Arbëresh linguistic varieties constitute a rich field of investigation for interesting phenomena of language attrition and contact. Because of the ancient and prolonged situation of bilingualism between Albanian and Italo-Romance varieties an interesting set of phenomena of code-switching, loan, convergence and hybridization has presented itself. This research concerns the Arbëresh linguistic minority of Greci, a small town in the Campanian region of southern Italy. Within Arbëria, the widespread archipelago of Albanian-speaking communities which occupies a vast territory in southern Italy, the preservation of Arbëresh presents very different sociolinguistic situations. Inside Arbëria G…

Settore L-FIL-LET/12 - Linguistica ItalianaDialectologylinguistic minoritiesSociolinguisticLanguage attritionArbëresh linguistic varieties minority language convergence hybridization language attrition and contact
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