Search results for "valori"
showing 10 items of 365 documents
Un approccio nello state space di un problema di controllo finanziario
2004
Nell'ambito dei metodi di sintesi che si prefiggono l’obbiettivo di ottenere un sistema a ciclo chiuso con la desiderata distribuzione di autovalori della matrice dinamica (per la nota relazione che esiste tra detti autovalori ed i modi del sistema) nel presente lavoro si propone un procedimento di sintesi applicato ad un problema di portafoglio, al fine di evidenziare l’efficacia di tali strumenti d’indagine anche in ambito finanziario.
Bagheria città della bella architettura barocca e tardo barocca - Bagheria Il Barocco e il Tardo Barocco
2020
La realizzazione delle ville nella Conca d’Oro di Palermo ha un incremento significativo nella seconda metà del Seicento. Prima di quel periodo, il territorio attorno a Palermo era puntellato da torri, bagli, cappelle rurali e rare architetture suburbane per la residenza stagionale. Le direttrici della cultura della villeggiatura sono rappresentate ad est di Palermo da Bagheria e Santa Flavia, e a ovest da Mezzo Monreale, Pallavicino e S. Lorenzo. Anche nella “Bagaria”, contrada appartenente a Palermo fino al 1826, anno in cui divenne comune autonomo, alle numerose torri, bagli fortificati e cappelle rurali si cominciarono ad aggiungere, già a metà del Seicento numerose ville, che costituiv…
Accordi per la promozione della fruizione (art. 105)
2000
Commento all'art. 105 del Testo unico dei beni culturali e ambientali.
Beni paesaggistici
2019
Il lavoro rappresenta un commento all'art. 134 del Codice dei beni culturali e del paesaggio
Optimization of acetate production from citrus wastewater fermentation
2021
Abstract Citrus wastewater is a sugar-rich waste stream suitable for the recovery of energy of material from its treatment. In this study, fermentation of citrus wastewater was carried out to assess the optimal conditions to maximize the bioconversion of the organic substrate into acetate. Unbalanced nutrient (C: N: P 200:0.1:0.1) enabled the highest acetate production. The presence of the particulate organic fraction enabled to obtain a higher acetate concentration regardless the initial COD concentration. Initial pH values higher than 5 did not cause substantial differences on the maximum bioconversion of COD into acetate in Trial 3, whereas pH lower than 5 hindered the hydrolysis process…
Catalytic valorisation of Chlorella sp. algae to obtain 5-Hydroxymethylfurfural in the presence of Nb2O5 or NbOPO4
2023
Microalgae are interesting biomass able to growth in not-arable lands, in wastewaters or seawaters. There are plenty of species of microalgae and several of them find application in various industrial sectors because they are source of several products in an integrated biorefinery view. In this work two acidic heterogeneous catalysts, namely Nb2O5 and NbOPO4 have been used. Both are commercial products provided by CBMM and they have been physico-chemically characterised. The isomerisation/dehydration reactions proceed through a tandem pathway involving the Lewis and Brønsted acid sites provided by the surface of the acidic solids giving rise to the isomerization of glucose to fructose, foll…
A Solar Photothermocatalytic approach for the CO2 conversion: Investigation of different synergisms on CoO-CuO/Brookite TiO2-CeO2 catalysts
2022
Abstract The photoactive features of the least common polymorph of TiO2, i.e. brookite, were combined with the thermocatalytic redox ones of cerium oxide, focusing on the effects of the addition of small amounts of Co-Cu oxides for the solar CO2 conversion. By considering the characterization data, a surface segregation of the hosted metal oxides on the TiO2-CeO2 composite was evidenced, and their presence increased the amount of oxygen vacancies and improved the charge carriers separation. The bimetallic oxides-based sample was the most performing one in the photocatalytic carbon dioxide reduction at room temperature. The formation of carbon monoxide and methane was 5 and 0.5 μmol g−1h−1, …
Photocatalytic CO 2 Valorization by Using Ti O2 , ZrO2 and Graphitic Based Semiconductors
2018
In this century, a broad scientific interest has been devoted to fulfill sustainable industrial processes and climatic change remediation. In this prospective, various green technologies have been studied to valorize CO 2• The aim of this research is the CO 2 reduction in presence of water by using the photocatalytic technology with nanomaterials as the photocatalysts. The present work overviews the main outcomes obtained by using graphitic and oxide based photocatalysts both in gas/solid and liquid/solid batch reactors under simulated solar light. In all gas/solid regime tests the major products detected were methane, carbon monoxide, and acetaldehyde.
Démocratisation de l'enseignement supérieur et emprise des parcours
2014
This article looks at how the organization of the education system and the pathways leading to higher education enable social mobility or on the contrary the reproduction of inequalities. We thus compare three countries: France, Switzerland, and Canada. The results using panel data in these three countries show two different situations. The more higher education is valued rather than vocational training, the more inequalities tend to increase. The competition is such that it is the youth with a privileged social background who benefit more from its expansion. On the other hand, when the vocational education and training is more valued, inequalities in higher education could tend to be more …