170,716 research outputs found
Recovering the architectural patrimony of South Italy: The Medieval Kingdm of Sicily Image Dataabse
No full textThe Medieval Kingdom of Sicily Image Database uses new media technologies to reframe
our understanding of medieval Europe by focusing on the role of the built environment for the formation
of State identity in the medieval Kingdom of Sicily during the Norman, Swabian, Angevin
and Aragonese dynasties (c. 950-1420). The material in the database is important for two reasons:
the significance of South Italy as a prototype of multicultural State formation and the highly fragmentary
condition (war bombardment, earthquakes, urban transformation) of the sites that played
a central role in the power structures of the Kingdom. A comprehensive database of historical images
of monuments and cities (prints, drawings, maps, photographs) made by scholars, artists and
travellers from the fifteenth century to the twentieth century, can enable scholars and the public to
recover the appearance of the landscape, cities, and individual monuments prior to radical renovation
or destructions. An interdisciplinary research team is conducting a systematic survey and critical
cataloguing of images dispersed in the archives, museums and libraries of Italy, Europe and US
Introduzione a: Reimpiego, rilavorazione, rifunzionalizzazione: la “lunga vita” della scultura medievale nei cantieri di Età moderna, a cura di Paola Vitolo, Clario Di Fabio, Laura Cavazzini, in «Mélanges de l’École française de Rome» 2021, 133/1, pp. 1-120.
No full textUn’Isola nel contesto mediterraneo: politica, cultura e arte nella Sicilia e nell’Italia meridionale in Età medievale e moderna
No full textAtti del convengo internazionale: Un’Isola nel contesto mediterraneo: politica, cultura e arte nella Sicilia e nell’Italia meridionale in Età medievale e moderna. Convegno di chiusura del Progetto FIR 2014 “Regine, re e viceré: immagini e strategie del potere in Sicilia fra tardo medioevo e prima età moderna. Le fonti materiali per una storia dinamica del territorio / Queens, kings and viceroys: images and strategies of power in Sicily between late Middle Ages and Early Modern Age. Material sources for a dynamic history of the territory”. Catania, Dipartimento di Scienze della Formazione, 21 marzo
La scultura in stucco
No full textAnalisi della produzione di scultura in stucco del Medioevo campano, con nuove attribuzioni e segnalazioni
Decomposition of topologies on lattices and hyperspaces
No full textThe notion of decomposable topology is introduced in a partially ordered set, and in particular in the lattice C(X) of all closed subsets (ordered by reverse inclusion) of a topological space X, which is also called the hyperspace of X. This notion is closely related to the concepts, defined in the same framework, of lower, upper and strong upper topology.
In this paper we investigate decomposability and unique decomposability of the main hyperspace topologies, and of topologies which are defined on some quite natural lattices or semilattices
On the infimum of the Hausdorff metric topologies
No full textGiven a metrizable space X and a compatible metric d, one defines the Hausdorff metric topology Hd and the upper and lower Hausdorff topologies corresponding to d, Hd+ and Hd- respectively, on the collection C(X) of all closed subsets of X.
In this paper we consider the infima τ, τ+ and τ−, of the topologies Hd, Hd+ and Hd- respectively, where d runs over the set M(X) of all compatible metrics on X. These topologies are sequential, that is, they are completely characterized by convergent sequences.
In particular, the topologies τ+ and τ− are investigated in detail: a suitable topology U+ is defined which has the same convergent sequences as τ+, and the lower Vietoris topology V− plays a similar role with respect to τ−.
We show that, in general, the equality τ = τ+ ∨ τ− does not hold. We also show that τ is a T2-topology on C(X) if and only if X is locally compact
Activated carbons from hydrothermal carbonization of municipal solid waste
No full text1. Introduction – In recent years, the global production of municipal solid waste (MSW) has increased. A significant amount of the waste that is not suitable for recycling is incinerated or landfilled, raising serious environmental issues. This has promoted the investigation of more sustainable technologies for waste exploitation and conversion towards valuable materials. Hydrothermal carbonization (HTC) has received considerable attention for its potential to process heterogeneous organic wastes. Operating under aqueous conditions at moderate temperatures and autogenous pressure, HTC yields a carbonaceous solid product known as hydrochar. The condensed carbon structure makes hydrochar attractive as a feedstock to produce materials such as activated carbons [1]. In the present study the potential of HTC to valorize a waste stream from mechanical biological treatment of mixed MSW, specifically the under-sieve fraction, which is currently landfilled, was explored. Activated carbons were prepared through HTC followed by chemical activation, and tested for the removal of pollutants, namely Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX), from aqueous phases. The investigation was performed through the Design of Experiment (DoE) - Response Surface Methodology (RSM) approach, in order to assess the optimal process conditions to achieve the desired product properties.
2. Experimental – The under-sieve fraction from the mechanical treatment of mixed MSW was provided by Scapigliato S.r.l., a waste management company located in Tuscany (Italy). HTC tests were conducted in a laboratory-scale stainless-steel reactor. Activated carbons were prepared by chemical activation of hydrochar (HC) using potassium hydroxide (KOH). Tests were performed in a fixed bed tubular reactor at different activation temperatures (500-700 °C) and impregnation ratios KOH/HC (0.5–1.5 wt/wt), according to a randomized design matrix obtained by DoE-RSM. Batch adsorption experiments were carried out using BTEX solutions in tap water with the activated carbons produced.
3. Results and Discussion – The obtained results demonstrated the feasibility of HTC for the waste feedstock considered. The joint effect of process parameters (temperature, time, and solid load) on the yield and properties of the hydrochar produced was evaluated. Predictive models were developed by RSM analysis, and the optimum conditions for maximizing the carbon yield were identified and selected to produce hydrochar for activated carbons preparation: 190 °C reaction temperature, 60 min reaction time, and 5 wt % solid load. The chemical activation stage led to the development of a porous structure, as evident by scanning electron microscopy (SEM) analysis (Image 1). RSM analysis allowed to investigate the effects of activation temperature and KOH/HC impregnation ratio on activated carbons morphology and adsorption capacity. Specific surface areas reaching up to 587 m2/g were achieved with the highest activation temperature and impregnation ratio explored. Notably, the maximum BTEX removal efficiency, approximately 85 %, was attained under mild activation conditions (600 °C) (Image 2).
4. Conclusions – The results evidenced that hydrothermal carbonization followed by chemical activation is a promising way to convert waste into valuable adsorbents suitable for contaminants removal from water.
5. References
[1] E. Stefanelli, S. Vitolo, N. Di Fidio, M. Puccini, J. Environ. Manag., 345, (2023) p. 118887
The Medieval Kingdom of Sicily Image Database. A Tribute to Caroline Bruzelius
No full textIn 2021 a group of researchers and students on both sides of the Atlantic Ocean toasted ten years of The Medieval Kingdom of Sicily Image Database project (https://kos.aahvs.duke.edu/): a collection of historical images of medieval monuments in Southern Italy launched in 2011 in order to document the turbulent history of this highly stratified patrimony, images that testify to the cultural richness of the Italian South. Online since October 2016, the project was fostered by Caroline Bruzelius at Duke University (NC) and, if it has become an invaluable research and study tool, it is thanks to her charisma and her indefatigable enthusiasm in the face of new challenges, both of which have helped her become as much a leading light in the world of Digital Humanities as she had already become in the field of medieval architecture. The papers presented in this volume, authored by both scientific collaborators and students, are a tribute to her, to celebrate ten years of the project and ideally to reap the fruit of the ambitious and visionary idea that set it all in train
The Kingdom of Sicily Image Database
No full textThe Kingdom of Sicily Image Database uses new media technologies to reframe our understanding of medieval Europe by focusing on the role of the built environment for the formation of state identity in the medieval Kingdom of Sicily ruled by Norman, Swabian, Angevin and Aragonese dynasties (950-1420). The theme is important for two reasons: the significance of South Italy as a prototype of multicultural state formation and the highly fragmentary (war bombardment, earthquakes, urban transformation) state of the sites that played a central role in the power structures of this new state. A comprehensive database of historical images of monuments and cities (prints, drawings, maps, photographs, etc.) made by scholars, artists and travellers from the 15th to the 20th centuries, can enable scholars and the public to recover the appearance of the landscape, of cities, and of individual monuments prior to radical renovations or destructions. An interdisciplinary research team is conducting a systematic survey and critical cataloguing of images dispersed in the archives, museums and libraries of Italy, Europe and US
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