Search results for "Icon"

Icona vs quadro. Il dualismo visuale dell'ekphrasis dostoevskiana

2015

In questo articolo vengono esaminati alcuni aspetti degli interessi figurativi di Fëdor Michajlovič Dostoevskij, che com’è noto fu attento osservatore di opere d’arte, con lo scopo di individuare le modalità di appropriazione delle immagini da parte dell’autore This article examines some aspects of the figurative interests of Fyodor Mikhailovich Dostoevsky, who is known as an attentive observer of works of art, with the aim of identifying the ways in which the images were appropriated by the author

Conditions of the recognition of the civil status of transexual and transgender people

2018

La ricerca intende dimostrare che in Europa, e in particolare in diversi ordinamenti nazionali come ad esempio quello italiano e quello inglese, sono stati fatti passi in avanti molto significativi nel tentativo di elaborare uno statuto giuridico completo a favore delle persone transessuali e transgender, con una chiara individuazione dei loro diritti e dei loro doveri. L’ordinamento italiano è pervenuto alla conclusione che una combinazione di misure legislative, in piena armonia con le pronunce della Corte Costituzionale e della Corte di Cassazione, era fortemente necessaria per dare origine ad una serie di principii volti a promuovere al più alto rango dei diritti umani fondamentali le a…

I libri e l’ingegno. Studi sulla biblioteca dell’architetto (XV-XX secolo)

2010

O Brasil na rota das migrações internacionais qualificadas espanholas no século XXI

2018

In order to understand recent migration, it is crucial to analyze the migratory modalities such as skilled international migration to Brazil, especially considering the ongoing transnational economic processes and their effects on the corresponding societies. Therefore, this article seeks to understand how the migratory dynamics of highly skilled Spanish professionals to the country are established taking into account the theoretical contribution of the circulation of brains and the category of knowledge workers. For this purpose, information from Brazilian?s Ministry of Labor is used on labor authorizations, financial contributions and insertion in the formal market in Spain; as well as da…

Infrastrutture, territorio, città. Il Campus Universitario come ambito di studio e sperimentazione

2011

L’obiettivo della ricerca, condotta all’interno del laboratorio di laurea tenuto dal prof. Vincenzo Melluso, è quello di riconfigurare l’area del Campus Universitario di Palermo attraverso la complessiva nuova definizione della mobilità interna. In particolare s’intende esplorare il rapporto tra carrabilità e pedonalità proponendo un modo alternativo di fruizione dello spazio del Campus basato su una pedonalità diffusa ed una carrabilità limitata. Questo obiettivo mette in evidenza tre questioni che il progetto intende affrontare: Ridefinizione dei tracciati esistenti;inserimento del sistema infrastrutturale APM; inserimento di nuove architetture destinate a servizi ed attrezzature. Come ba…

Surfactant-assisted synthesis of Cd1−xCoxS nanocluster alloys and their structural, optical and magnetic properties

2010

We report the synthesis of Co-doped CdS nanoclusters (Cd1−xCoxS) for different doping concentrations (x = 0.10, 0.20 and 0.30) and characterization of their structural, optical, and magnetic properties. The structural properties studied by X-ray diffraction revealed hexagonal-greenockite structure and a decrease of the lattice parameters (a and c) with doping, showing incorporation of Co in the lattice. The morphology of the nanoclusters was studied by scanning electron microscopy. The optical absorption studies, using diffused reflectance spectroscopy, revealed that Co doping modifies the absorption band edge. Ferromagnetic phase was observed in the magnetization measurements at room-tempe…

Cathodoluminescence and photoluminescence study of trap centers in amorphous silicon oxynitride

2002

Amorphous silicon oxynitride (a-SiO/sub x/N/sub y/) films with different compositions were prepared using low-pressure chemical vapor deposition (LPCVD) technique, The cathodoluminescence and photoluminescence of this samples were measured from the red band to the ultraviolet band to study the trap centers in silicon oxynitride. A 1.8-1.9 eV band was found and is attributed to the oxygen and nitrogen atoms with unpaired electrons whereas the 2.7 eV band is attributed to two-fold coordinated silicon atoms with two electrons. The 5.4 eV shoulder is due to the peroxy radicals and other ultraviolet bands are supposed to due due to the Si-Si bonds.

Anomalous and normal Hall effect in hydrogenated amorphous Si prepared by plasma enhanced chemical vapor deposition

2010

The double sign anomaly of the Hall coefficient has been studied in p -doped and n -doped hydrogenated amorphous silicon grown by plasma enhanced chemical vapor deposition and annealed up to 500 °C. Dark conductivity as a function of temperature has been measured, pointing out a conduction mechanism mostly through the extended states. Anomalous Hall effect has been observed only in the as-deposited n -doped film, disappearing after annealing at 500 °C, while p -doped samples exhibit normal Hall effect. When Hall anomaly is present, a larger optical band gap and a greater Raman peak associated with Si-H bond are measured in comparison with the cases of normal Hall effect. The Hall anomaly wi…

Enhanced Heterogeneous Catalytic Conversion of Furfuryl Alcohol into Butyl Levulinate

2014

We study the catalytic condensation of furfuryl alcohol with 1-butanol to butyl levulinate. A screening of several commercial and as-synthesized solid acid catalysts shows that propylsulfonic acid-functionalized mesoporous silica outperforms the state-of-the-art phosphotungstate acid catalysts. The catalyst is prepared via template-assisted sol-gel polycondensation of TEOS and MPTMS. It gives 96 % yield (and 100 % selectivity) of butyl levulinate in 4h at 110 °C. Reaction profiles before and after a hot filtration test confirm that the active catalytic species do not leach into the solution. The catalyst synthesis, characterization, and mode of operation are presented and discussed. Sour ca…

Solvothermal Synthesis of Molybdenum–Tungsten Oxides and Their Application for Photoelectrochemical Water Splitting

2018

Molybdenum and tungsten oxides are of interest as semiconductors for the production of clean and sustainable energy. Here we show that synergistic effects arising from a combination of noncrystalli...