Search results for "ground"
showing 10 items of 2432 documents
Adrano, Efesto e i Palici. Culti, interazioni etniche e middle ground nella Sicilia antica
2015
Stranieri o nativi che fossero (εἴτε εἶεν ξένοι εἴτε ἐπιχώριοι), coloro che si accostavano ai santuari dei Palici, di Adrano e di Efesto assumevano un atteggiamento ricettivo e fiducioso, effetto di una strategia “macroretorica” che offriva forme di transazione e di mediazione in un quadro diffuso di conflittualità tra individui e tra gruppi. In questo volume, il ricorso al modello interpretativo del middle ground e al concetto di “porosità” culturale mostra che sia le comunità indigene sia quelle greche si ridefinivano in modi differenti nei diversi contesti spazio-temporali e adattavano la propria struttura identitaria alle più svariate circostanze: dal punto di vista di una “ecologia cul…
I tamburi a cornice in Sicilia
2015
Le prime attestazioni della presenza del tamburo a cornice in Sicilia risalgono al V secolo a.C. Lo strumento è poi documentato fino ai giorni nostri attraverso raffigu¬razioni, documenti d’archivio, resoconti di viaggiatori stranieri, testi di interesse folklorico e, piuttosto ampiamente, dalla ricerca etnomusicologica moderna, per mezzo di audio-registrazioni e videofilmati. Morfologia, tecniche esecutive, repertori, decorazioni, contesto d’uso dei tamburelli in Sicilia si inscrivono nel più ampio quadro dell’area italiana (centro-meridionale) e mediterranea, ma con alcune specificità, soprattutto nelle tecniche esecutive. Queste, sebbene affini a quelle impiegate in altre regioni italian…
Didattica della Lingua Tedesca
2014
Il volume offre una riflessione glottodidattica sull’apprendimento del tedesco come lingua straniera alla luce delle ricerche condotte in Germania e in Italia. Si rivolge a chi si accinge a entrare nel mondo dell’insegnamento o è già impegnato nella formazione in ambito linguistico, ma soprattutto a coloro che si orientano verso la ricerca nel contesto universitario nazionale e internazionale del tedesco lingua straniera (DaF). Con questo intento il testo analizza i percorsi di chi apprende una lingua straniera e punta su temi ancora poco trattati in Italia, come ad esempio il lavoro per progetti e la metodologia della ricerca qualitativa.
Ritrattare la metafisica?
2016
L'articolo discute alcune interpretazioni del libro di L. Samonà, Ritrattazioni della metafisica, mettendo in rilievo lo sfondo ontologico della fenomenologia ermeneutica e il carattere dialettico interno alla dimostrazione per via di confutazione del principio inconcusso
Exploring the Underground Economy through System Dynamics to support Public Decision Makers: a preliminary qualitative analysis
2008
To estimate and analyse the underground economy phenomenon, different methods and approaches have been provided in literature. However, such approaches are very often based on static and linear equilibrium models and seldom adopt simulation tools. This paper results from a research project conducted in the Sicily Region (Italy) aimed at investigating – through the System Dynamics methodology – main causes-and-effects relationships underlying the phenomenon of the “hidden workers” at both firm and self-employment level. By combining micro and macro-analysis, the authors present a preliminary causal loop diagram of the investigated phenomenon. Such feedback structure has been built through th…
A geophysical and geochemical approach for seawater intrusion assessment in the Acquedolci coastal aquifer (Northern Sicily)
2007
Vertical electrical sounding (VES’) surveys and chemical analyses of groundwater have been executed in the coastal plain of Acquedolci (Northern Sicily), with the aim to circumscribe seawater intrusion phenomena. This urbanized area is representative of a more general problem interesting most of Mediterranean littoral areas, where intensive overdraft favors a heavy seawater intrusion through the coastline. Aquifer resistivity seems decisively to be conditioned by the chlorine and magnesium content in the main aquifer of the region. Schlumberger VES’, together with piezometric and chemical–physical information of groundwater, allowed us to perform hydrogeological and geophysical elaborations…
Statistical Learning for End-to-End Simulations
2018
End-to-end mission performance simulators (E2ES) are suitable tools to accelerate satellite mission development from concet to deployment. One core element of these E2ES is the generation of synthetic scenes that are observed by the various instruments of an Earth Observation mission. The generation of these scenes rely on Radiative Transfer Models (RTM) for the simulation of light interaction with the Earth surface and atmosphere. However, the execution of advanced RTMs is impractical due to their large computation burden. Classical interpolation and statistical emulation methods of pre-computed Look-Up Tables (LUT) are therefore common practice to generate synthetic scenes in a reasonable…
Mapping Leaf Area Index with a Smartphone and Gaussian Processes
2020
Leaf area index (LAI) is a key biophysical parameter used to determine foliage cover and crop growth in environmental studies. Smartphones are nowadays ubiquitous sensor devices with high computational power, moderate cost, and high-quality sensors. A smartphone app, which is called PocketLAI, was recently presented and tested for acquiring ground LAI estimates. In this letter, we explore the use of state-of-the-art nonlinear Gaussian process regression (GPR) to derive spatially explicit LAI estimates over rice using ground data from PocketLAI and Landsat 8 imagery. GPR has gained popularity in recent years because of its solid Bayesian foundations that offer not only high accuracy but also…
MS-CASPT2 analysis of the UV thermochromism of octamethyltrisilane
2006
We interpret the reversal of the direction of the thermochromic shift of the first absorption band of peralkylated oligosilanes as the silicon chain is extended, based on multistate complete active space second-order perturbation theory (MS-CASPT2) calculations for octamethyltrisilane, Si3Me8. The observed shift is attributed to the effect of b1 distortions from ground state equilibrium geometry on vertical excited state energies and intensities. A generally contracted basis set of atomic natural orbitals (ANOs) at a ground state geometry optimized in the second-order Moller–Plesset perturbation theory (MP2) approximation with Dunning's correlation consistent triple-zeta basis set (cc-pVTZ)…
Simplification of Models
2016
In practical applications the “complete” model, i.e., a model that contains all features that the experts in the application domain consider important, is often quite complicated and difficult to analyse mathematically. A straightforward numerical realization is often costly and may give very little qualitative understanding of the situation. It is therefore important to study if the model can be systematically simplified in order to enhance a qualitative analysis/understanding.