2,658 research outputs found
La nuova rivoluzione industriale tra tecno-entusiasmo e tecnologia: un'analisi spaziale del sentiment
No full textImmaginari socio-tecnologici e analisi spaziale delle percezioni. – L’obiettivo di questo lavoro è quello di affrontare l’impatto della diffusione delle tecnologie avanzate non tanto dal punto di vista quan-titativo e della rappresentazione della distribuzione spaziale del fenomeno, quanto sul piano delle percezioni e delle rappresentazioni che emergono dall’ascolto delle voci provenienti dal Web e dai social media. Sembra infatti sempre più urgente contribuire al dibattito sulle recenti rivoluzioni industriali e digitali, esplorando nuove metodologie di analisi del fenomeno e dando spazio a diversi punti di vista e alle opinioni dei soggetti non istituzionali e non protagonisti rispetto alle narrazioni più ricorrenti e pervasive elaborate intorno al pro-gresso tecnologico. A tale proposito, esiste un’ampia letteratura che interpreta i cambiamenti generati dalla quarta rivoluzione industriale facendo riferimento alla produzione di tecnologie sempre più avanzate e alla loro forza dirompente in termini di impatto socioeconomico e di contributo ai diversi campi della vita umana e più recentemente anche ai processi di transizione ecologica (Schwab, 2016). Inoltre, come rilevano diversi studi nel campo della geografia economica e dell’economia regionale (De Propris e Bailey, 2020; Capello e Lenzi, 2022), la diffusione delle tecnologie 4.0 sta producendo trasformazioni non solo sulla vita delle per-sone e sulle comunità locali, ma anche sui sistemi urbani e regionali e sui livelli di sviluppo dei contesti a diverse scale territoriali
Linguistica storica, a cura di Romano Lazzeroni, 1987
No full textChambon Jean-Pierre. Linguistica storica, a cura di Romano Lazzeroni, 1987. In: Nouvelle revue d'onomastique, n°13-14, 1989. Onomastique et révolution : tradition et changement. Nom de rues, noms de lieux, prénoms. p. 207
Linguistica storica, a cura di Romano Lazzeroni, 1987
No full textChambon Jean-Pierre. Linguistica storica, a cura di Romano Lazzeroni, 1987. In: Nouvelle revue d'onomastique, n°13-14, 1989. Onomastique et révolution : tradition et changement. Nom de rues, noms de lieux, prénoms. p. 207
La Toscana degli spazi produttivi. Una lettura geografica dell’evoluzione dell’industria e dei servizi dal dopoguerra ad oggi
No full textOptimal planning of battery systems for power losses reduction in distribution grids
No full textThe minimization of the power losses in the distribution grid is one of the main issue for the Distribution System Operator in order to reduce the management costs of the grid. The recent development of the battery technologies has introduced new possible applications for these systems within the radial distribution grid. In fact, batteries can be opportunely integrated in the grid and managed in order to reduce the power losses, and consequently increasing, for instance, the penetration of the renewable distributed generation and contributing to voltage regulation through reactive power production from battery inverter. In this context, one of the main research interest is the definition of the optimal siting and sizing of the energy storage solutions, considering a battery management capable to reduce network power losses and taking into account battery installation costs.
Since network losses are expressed by means of quadratic function, an approach based on Mixed Integer Quadratically Constrained Quadratic Programming is proposed here to identify possible batteries optimal management strategies capable to minimize the power losses. Evaluation of the grid variables is obtained by the iterative Backward/Forward Sweep method implemented within the formulation of the optimization problem. The reactive power generated by the battery inverter is modeled as well by introducing quadratic constraints in order to further contribute in the network power losses reduction, taking into account the power factor limitation due to the inverter capability curve.
An optimization procedure, called D-XEMS13, based on the formulation of the optimization problem, is implemented within a single loop optimization algorithm in order to identify the best size of the connected BESSs units, capable to maximize the reduction of the power losses in test grids. BESS optimal placement is also identified through a proposed approach based on a nodal sensitivity analysis of the network power losses. Validation of the proposed approach is then obtained by means of a cost/benefit comparison from energy point of view.
Finally, the single loop optimization algorithm is further implemented on two test grids with optimal BESSs sizes and siting, assuming different capability curves for the BESS inverters. The results of simulations with the corresponding benefits are then presented and discussed
La nuova rivoluzione industriale tra tecno-entusiasmo e tecnofobia: un’analisi spaziale del sentiment
No full textThe new industrial revolution between techno-enthusiasm and technophobia: a spatial analysis of sentiment.
The growing diffusion of advanced technologies has led to an intense debate on the existence of a new industrial revolution and its effects on individual lives, local communities, and spaces. The present work aims to contribute to this debate, focusing the attention on the perceptions of changes, which swing between tendencies of techno-enthusiasm
and expressions of technophobia. Starting from the literature developed on socio-technological imaginaries, the paper analyzes the fourth industrial revolution through the opinions expressed on the web, using Sentiment Analysis. The empirical work was carried out on cities located in different areas of Italy and characterized by different manufacturing
vocations and development prospects (Pisa, Terni, Taranto, Lecce)
Quarta rivoluzione industriale e nuove geografie dello sviluppo e delle disuguaglianze in Italia
No full textFourth industrial revolution and new geographies of development and inequalities in Italy. The objective of this paper is to analyse the impact of the fourth industrial revolution, from two points of view: on the one hand, the ability of innovation and 4.0 Industry technologies to determine development dynamics and better accessibility conditions; on the other, the possibility that these technologies can amplify the differentials and territorial
fractures. Starting from theoretical and empirical studies on the fourth industrial revolution, the work focuses attention on the Italian territory, combining the reading of the distribution of high-tech companies with that of some contextual components, which can facilitate or hinder the impact of advanced technologies. The picture prompts us to reflect on the definition of policies aimed at strengthening weak areas and reducing gaps
Low-pressure receptor activity and exaggerated natriuresis in essential hypertension
No full textLow-pressure receptor activity and exaggerated natriuresis in essential hypertension.
Coruzzi P, Novarini A, Biggi A, Lazzeroni E, Musiari L, Ravanetti C, Tagliavini S, Borghetti A.
Abstract
Urinary sodium excretion, central hemodynamics, and mean arterial pressure (MAP) were studied in 7 normal subjects and 19 hypertensive patients during both central hypervolemia by water immersion to the neck (NI) and extracellular volume expansion by i.v. saline infusion. During 2-hour NI, 12 out of the 19 hypertensives exhibited a significant fall in MAP (p less than 0.001). Exaggerated natriuresis did not occur in these patients (ns). In the remaining 7 hypertensive patients in whom, during NI, MAP was unchanged, exaggerated natriuresis was found (p less than 0.001). During saline infusion, MAP was either unchanged or increased and exaggerated natriuresis was found in all hypertensive patients (p less than 0.001) previously submitted to NI. Our findings suggest that a high MAP is a major determinant of exaggerated natriuresis in arterial hypertension
Il parossistico “mercato” dei contratti collettivi
No full textDopo un’indagine dei mutamenti dell’attuale quadro regolativo, onde cogliere le dinamiche messe in atto, in particolare sul fronte sindacale, ispettivo e giurisprudenziale, per sopperire alla fuga dal sindacato e dal contratto collettivo maggioritario, ingenerata dall’incontrollato proliferare di accordi sindacali minori, l’A. riflette su paradossi, dinamismi e immobilismi del nostro sistema di contrattazione collettiva.After an investigation of the changes in the current regulatory framework, in order to grasp the dynamics implemented, in particular by trade unions, labour inspectors and the jurisprudence, to make up for the escape from the unions and majority collective agreements generated by the uncontrolled proliferation of “minor” union agreements, the Author reflects on paradoxes, dynamism and immobilism of our system of collective bargaining
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