196,831 research outputs found
Urban commons and freedom of movement: The housing struggles of recently arrived migrants and refugees in Rome
No full textLuce e atmosfera : una direttrice alternativa
No full textNel contesto della riflessione sull'opera di Mariano Fortuny, si individua una direttrice di pensiero e sperimentazione sulla luce in scena che risale alla fine del Settecento. L'analisi è condotta sulla base di fonti di provenienza italiana, francese, tedesca e considerando il bagaglio culturale e artistico dell'artista spagnolo
Active material utilization and capacity of fiber-based battery electrodes
No full textThis study presents a three-dimensional computational model to evaluate effective conductivity and capacity of fiber-based battery electrodes. We employ electrodes composed of conductive and active material nanofibers dispersed in an electrolyte matrix. The effective conductivity is calculated by means of an equivalent resistor network model, while capacity evaluation is based on the identification of active material fibers that are accessible to electrons (i.e., those connected with the electronically conductive network). When a constraint is applied to the total fiber content, an optimal active-conductive material ratio is determined that maximizes the active material utilization and the electrode capacity. We also study fiber orientation effects on the electrode electrochemical properties. It is found that fiber orientation has a strong impact on the percolation threshold, and this impact also reflects on the active material utilization: the more the fiber orientation deviates from the ideal isotropic distribution, the lower the utilization of active material fibers. This is of special interest for practical applications where geometrical constraints on fiber orientation arise, as in the case of electrospun fibers deposited on a substrate. The results of this study are therefore meant to give an insight into how a fibrous electrode architecture performs and suggest effective design solutions.Applied Mechanic
Tensorial effective transport properties of Li-ion battery separators elucidated by computational multiscale modeling
No full textExisting battery modeling works have limitations in addressing the dependence of transport properties on local field variations and characterizing the response of anisotropic media.
These limitations are tackled by means of a nested finite element (FE2) multiscale framework in which microscale simulations are employed to comprehensively characterize an anisotropic medium (macroscale).
The approach is applied to the numerical simulation of transport processes in lithium ion battery separators.
From the microscale solution, homogenized fluxes and their dependence on the downscaled macroscale variables are upscaled, thereby replacing otherwise assumed macroscale constitutive laws.
The tensorial nature of macroscale effective transport properties stems from the numerical treatment.
The proposed approach is verified against full-scale simulations. Several numerical examples are used to demonstrate the perils associated with accepted procedures, leading in some cases to severe discrepancies in the prediction of field quantities (from differences in the potential drop across the separator of about 27% for a fixed microstructure to more than 100% in the case of an evolving microstructure). Despite the use of simplified assumptions (e.g., synthetic microstructures), the numerical results demonstrate the importance of a tensorial description of transport properties in the modeling of battery processes
Antitesi e paradossi di un matrimonio infelice: Questa specie d’amore di Alberto Bevilacqua
No full textEndothelin-receptor antagonists in the management of pulmonary arterial hypertension: where do we stand?
No full textMichele Correale,1 Armando Ferraretti,2 Ilenia Monaco,3 Davide Grazioli,1 Matteo Di Biase,4 Natale Daniele Brunetti3 1Department of Cardiology, Ospedali Riuniti University Hospital, Foggia, 2Cardiology Unit, “Caduti in guerra” Hospital, Canosa di Puglia, BT, 3Department of Cardiology, University of Foggia, 4Santa Maria Hospital, GVM Care and Research, Bari, Italy Abstract: Pulmonary arterial hypertension, a disease largely neglected until a few decades ago, is presently the object of intense studies by several research teams. Despite considerable progress, pulmonary arterial hypertension remains a major clinical problem, because it is not always easy to diagnose, treat, and prevent. The disease was considered incurable until the late 1990s, when Epoprostenol was introduced as the first tool against this illness. More recently, therapy for pulmonary arterial hypertension gained momentum after publication of the SERAPHIN and AMBITION trials, which also highlighted the importance of upfront therapy. This review also focuses on recent substudies from these trials and progress in drugs targeting the endothelin pathway. Future perspectives with regard to endothelin-receptor antagonists are also discussed. Keywords: endothelin-receptor antagonists, pulmonary arterial hypertension, Bosentan, ambrisentan, sitaxentan, macitenta
'Paralipomena', de Joan Fontcuberta
No full textEn el número 52 de la revista L'Espill trobaràs un dossier monogràfic sobre "Cultura, art i política", amb contribucions de Manuel Guerrero, Ignacio París i Manuel Borja-Villel. A més, articles de Francesc Serés, Gaspar Jaén i Marco Lucchini, Carlos Thiebaut, Julián Marrades, Carme Castells, Carles Cabrera, Vicenç M. Rosselló i Verger, Tomàs Escuder, Joan Fontcuberta i Elio Grazioli, així com documents d'Agustín Rubio Vela, un full de dietari de Gustau Muñoz i una conversa amb Josep Fontana, per Francesc Viadel
Urban commons and freedom of movement: The housing struggles of recently arrived migrants in Rome
No full text
Resisting to the Neoliberal Urban Fabric: Housing Rights Movements and the Re-appropriation of the ‘Right to the City’ in Rome, Italy
No full textThis paper scrutinises the phenomenon of collective squatting for housing in Rome (Italy), which has reached remarkable proportions and developed new characteristics since the start of the 2008 crisis. Based upon two pieces of ethnographic research within the housing movement organisations Coordinamento Cittadino di Lotta per la Casa (Urban Coordination of Housing Struggles) and Blocchi Precari Metropolitani (Precarious Metropolitan Block), the authors aim to enlarge empirical knowledge of the case under study and provide renewed analytical instruments for understanding housing mobilisations. These organisations appear to be more than grassroots approaches to housing deprivation; they also represent alternative forms of social reproduction in post-welfare neoliberal cities. Indeed, squats configure themselves as sites for broader political elaboration. For this reason, we propose to analyse housing squatting using the notion of ‘urban commons’. The introduction of this notion to analyse housing movements helps in the theoretical elaboration of a re-appraised ‘right to the city’, in line with current urban challenges
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