1,721,232 research outputs found
Il potere magico di Federico II, Signore del mondo e degli elementi. Ideologia del sapere e ideologia del potere negli affreschi della cripta della cattedrale di Anagni
Full text linkFrederick II stands out in the context of the first half of the XIII century as repre-senting the peculiar attributes of the medieval emperor. However, the Swabian ruler, shaping an innovative political construction (“a work of art,” according to the defini-tion of Burckhardt), was considered the immutator saeculi who, by virtue of a singu-lar demiurgic capacity (the synthesis of calculation and artifice, but, also, of genius and recklessness) was able to “subvert the order,” placing himself – from opposite points of view – as sol invictus and rex pestilentiae, cooperator Dei and preambulum Anti- christi, lex animata and filius iniquitatis. A particular cycle of frescoes pre-served in the crypt of the cathedral of Anagni testifies to its irreducible contrast with pontifical authority. The cycle, investigated from a symbolic-political perspective, reveals itself to be a singular object of study, fraught with symbolic pathos and allusions to a magical-sacred universe within which the Church attempted to act as the sole hermeneutical navigator
Il sovrano demiurgo. Federico II di Svevia, ideologia e simbolica del potere. II edizione
No full textLa figura di Federico II, al di là di letture troppo mitizzanti, si staglia nel panorama del suo tempo (la prima metà del XIII secolo) con gli attributi propri dell’imperatore e dell’uomo medievale.
Tuttavia, è innegabile che il sovrano svevo, plasmando una innovativa costruzione politica (un’opera d’arte, secondo la definizione di Jacob Burckhardt), finì per assumere caratteristiche così liminari, che ci consentono di riconoscere in lui, immutator saeculi, un antesignano della modernità.
Si rende così evidente quella capacità demiurgica, sintesi di calcolo e artificio, ma, anche, di genio e sregolatezza, in forza della quale Federico fu, di volta in volta, riconosciuto sol invictus e rex pestilentiae, cooperator Dei e preambulum Antichristi, lex animata e filius iniquitatis.
Se sull’uomo e sul mito che da secoli l’accompagna ben difficilmente si può avere la pretesa di dire cose del tutto nuove, innovativa può essere considerata, invece, la prospettiva d’indagine – simbolico-politica – di questo libro, al cui vaglio saranno passati istituti giuridici e monumenti normativi (la defensa e le Constitutiones Melphitanae), prodotti del genio creativo e controverse dottrine filosofiche (l’augustale e l’averroismo politico). Particolarissimi oggetti di studio, tutti gravidi di pathos simbolico, che saranno indagati nel contesto di quell’affascinante età di transizione che implicherà la rapida trasformazione delle istituzioni politiche europee
Evaluation of peaked lateral transshipment in inventory systems subject to a service constraint
No full textOptimal Stock Allocation in Single Echelon Inventory Systems Subject to a Service Constraint
No full textAnaerobic digestion of mechanically sorted organic waste: The influence of storage time on the energetic potential
No full textThe separate collection is the privileged practice to manage municipal solid waste (MSW) in order to meet the more and more ambitious recovery targets enforced by legislation. Nevertheless, considerable amounts of unsorted MSW are still produced at European level and mechanical biological treatments (MBTs) are widely spread to pursue their valorization. Most MBT plants rely on aerobic biostabilization methods, whose product cannot be qualified as compost and raises the issue of its fate. Anaerobic digestion is an interesting option to treat mechanically selected organic waste, but its feasibility may be limited by the prolonged storage time of this kind of waste. This study evaluated the variation of the energetic potential of the organic fraction mechanically sorted from MSW deposited for different periods. Results showed that such potential decreased by 46% after only 3 days storage and further reduction was observed with increasing the deposit time. Experimental outcomes allowed the identification of an inverse relation between methane production and deposit time and addressed the proposal of a simplified approach to estimate the maximum storage period to take the greatest advantage from the anaerobic treatment of mechanically sorted organic waste
The valorisation of residual waste bales by urban mining
No full textIn the last decade, the approach to waste management has undergone severe changes. The urgent need to face the sustainable demand for energy and materials while limiting the burdens associated to traditional waste handling practices have figured out the concept of waste as a resource. New strategies boosting the extensive recovery and diverting waste from disposal activities have been promoted and framed in the wider context of the urban mining, promoting the full exploitation of waste as resource for either new materials or energy production. Such approach has been recently proposed to handle over 5 million tons of pretreated municipal solid waste produced and stored in the form of bales in Campania Region, in southern Italy, between 2000 and 2009. However, since the feasibility of this approach is related to the waste composition as well as to the selection process, an experimental study was performed at an industrial mechanical treatment plant to assess the potential for valorisation of this
waste. Results showed that the overall sustainability of the urban mining strategies for the management of Campania waste bales is tightly linked to the flexibility of the selection process scheme to be adopted, which should make the waste recovery fit the market demand of either material or energy
Composting of organic solid waste of municipal origin: the role of research in enhancing its sustainability
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