102,592 research outputs found
Corrigendum to “Tribochemistry of graphene on iron and its possible role in lubrication of steel” [Carbon 106 (2016) 118–124](S0008622316303797)(10.1016/j.carbon.2016.05.025)
No full textThe authors wish to update the reference to a “forthcoming article” in the sentence at page 122: “The difference between the maximum and minimum heights of the [Formula presented] peaks is proportional to the potential corrugation, ΔWsep. As we describe in a forthcoming article, these two properties have general validity, i.e. they hold true in different materials” with the reference to the now published paper: M. Wolloch, G. Levita, P. Restuccia, M. C. Righi, Interfacial charge density and its connection to adhesion and frictional forces, Phys. Rev. Lett. 121 (2018) 026804
Giant subcortical high-frequency SEPs in idiopathic generalized epilepsy: A protective mechanism against seizures?
No full textobjective: recently, we found that high-frequency somatosensory evoked potentials (HF-SEPs), which are modulated by arousal-related structures, were abnormally enhanced during N-REM sleep in two seizure-free IGE patients [restuccia d, rubino m, valeriani m, della marca g. increase of brainstem high-frequency SEP subcomponents during light sleep in seizure-free epileptic patients. clin neurophysiol 2005; 116: 1774-1778]. Here, we aimed at verifying whether similar HF-SEP abnormalities were significantly correlated to the clinical outcome in a larger population of untreated IGE patients. methods: patients were classified as juvenile myoclonic epilepsy (JME; six patients) and childhood or juvenile absence epilepsy (CAE and JAE, six patients). they were untreated because newly diagnosed, or because seizure-free. HF-SEPs from patients were compared with those obtained from 21 healthy volunteers. results: HF-SEPs were abnormally enhanced in all seizure-free CAE-JAE patients, whereas they were normal in all JME patients and in CAE-JAE patients with frequent seizures. not only scalp distribution, but also dipolar source analysis suggested a subcortical origin for these enhanced subcomponents, possibly in the brainstem. conclusions: the enhancement of HF-SEPs might reflect the hyperactivity of arousal-related brainstem structures; such an enhancement was found in all seizure-free CAE-JAE patients, while it was never observed in JME patients. significance: we speculate that the hyperactivity of arousal-related brainstem structures might account for the different clinical outcome among IGE subsyndromes. (c) 2006 international federation of clinical neurophysiology
Empirical fragility curves for masonry buildings struck by the 2016 Central Italy earthquake
No full textThe prevention of seismic risk at urban scale can be pursued through the estimate of the probability to reach or exceed a certain
damage grade given the seismic input. In this framework, seismic fragility curves are nowadays of large interest as they express
this probability in a synthetic way, also extended to large-scale applications. Real damage data are crucial in making more reliable
predictions of damage occurrence, although they can be influenced by a proper definition of the structural types and the
completeness of observations. The paper shows the empirical fragility curves obtained for a sample of 2263 masonry buildings
located within 19 historical centers struck by the 2016 Central Italy earthquake. The damage grade was evaluated according to the
European Macroseismic Scale (EMS-98), also considering undamaged buildings, at the end of the sequence that spanned between
August and October. The buildings largely underwent several repairs and strengthening actions with reinforced concrete elements
starting from the 1980s. The systematization of the structural features led to a taxonomy for strengthened and original buildings,
which, based on the observed damage patterns, was matched to the EMS-98 vulnerability classification. The sample ranges from
class A (worst behavior) to D (best behavior). Class A was typically assigned to original buildings (without interventions) or illadvisedly tampered ones, i.e., those in which interventions had an unfavorable contribution to their seismic behavior. Class D
described buildings with properly designed strengthening interventions, classes B and C intermediate situations. Fragility curves
were obtained per each vulnerability class, as a function of the highest peak ground acceleration (PGA) observed in the sequence
from ShakeMaps. The results were then compared to other empirical fragility model
Influence of pyrolysis parameters on the efficiency of the biochar as nanoparticles into cement-based composites
No full textIn this research, a particular kind of biochar provided by UK Biochar Centre has been added as nanoparticles into cementitious composites. Its principle characteristic lies in the standardization of its process production, that makes it suitable to been used as filler in cement-matrix composites, ensuring the reproducibility of the cement mix (I. Cosentino "The use of Bio-char for sustainable and durable concrete", 2017). The pyrolysis parameters and the content of carbon in the standardized biochar influenced its efficiency to enhance the mechanical properties of the cement composites: the results, in terms of flexural strength and fracture energy, have been worse than those obtained in previous studies (L. Restuccia "Re-think, Re-use: agro-food and C&D waste for high-performance sustainable cementitious composites", 2016), in which particles have been produced with higher temperature. However, also with standardized biochar a general enhancement of mechanical properties has been recorded, a sign that they can be used to create new green building materials. (C) 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers
No solo Penélopes: la participación de las mujeres ítalo-argentinas en la reivindicación de los derechos políticos y civiles
No full textThis work analyzes one of the aspects largely underestimated by scholars: the role played by women during the so-called "Great Emigration."
Among the many destinations of our great emigration, Argentina was, between 1860 and 1960, along with the United States, one of the favorite destinations for our compatriots. The image of immigrant women has long been that of a completely secondary and "hidden" figure within the family, even if they worked as much or more than men. On the contrary, the great Italian female exodus has had an impact at social, political, economic, demographic, and scientific levels, leading to a profound redefinition of gender roles for both the women who stayed at home and those who crossed the ocean.
However, beyond their contributions in the literary field, the aim of this study is to broaden the perspective and direct attention to those who have also engaged in other political and cultural fields. That is, to highlight how emigration has acquired significant "emancipatory potential" for women, enabling them not only to achieve independence—not just economic—but also transforming them into active protagonists of social change. Following the winds of new libertarian, socialist, and anarchist ideas that arrived from overseas along with intellectuals and professionals who emigrated from Europe and spread through workers' associations, many women, such as Alfonsina Storni, Carolina Muzilli, Julieta Lanteri, and Delia Parodi, have made a fundamental contribution to the advocacy of political and civil rights.
In its multifaceted and varied nature, female emigration was not only marked by defeats and pains, disappointments and failures, but also by happy declines and fruitful civic engagements, actively contributing to the formation of the nascent Argentine society
Narrativa dei Caraibi nel nuovo millennio
No full textL’etichetta “Letterature franco-caraibica” utilizzata, per convenzione, dalla critica per indicare unitariamente la produzione letteraria in lingua francese della regione centrale del Continente americano è assai impropria. La regione dei Caraibi abbraccia, infatti, sia alcune delle isole dell’arcipelago delle Piccole Antille (Martinica, Guadalupa), sia l’isola di Haïti, che fa parte delle Grandi Antille, che la Guiana incastonata sulla costa orientale dell’America meridionale. Pur nella diversità dei movimenti ideologici e degli avvenimenti storici che si sono succeduti nella regione, le opere letterarie degli scrittori caraibici francofoni, nel loro insieme, hanno oscillato, e continuano ad oscillare tra due tendenze: quella del radicamento nella tradizione e quella della fuga. Gli scrittori attingono sia dalla tradizione orale, che dalla letteratura francese, che a quella africana, mostrandosi aperti al confronto e al dialogo con le altre tradizioni letterarie e culturali, allo scopo di creare una forma narrativa che possa corrispondere alle molteplici eredità di quelle composite popolazioni. Qui, il sincretismo culturale che si è creato consente di riconoscersi in una identità comune in nome di tutto ciò che l'Occidente avrebbe voluto estinguere. Il comun denominatore sembra inverarsi nel contraddittorio risultato di incontri coraggiosi, ma pericolosi, di curiosità che possono condurre a conflitti, ad esclusioni. Si tratta di un’identità di frontiera; di un’identità in bilico, squilibrata, che dichiara nel suo colore, nella sua lingua un mescolamento ‘imperfetto’ che è ancora in cors
Experimental analysis of micro-tubular SOFC fed by hydrogen
No full textThis paper analyzes the thermodynamic and electrochemical performance of an anode supported micro-tubular Solid Oxide Fuel Cell (SOFC) fed by hydrogen. The micro-tubular SOFC used is anode supported, consisting of a NiO and Gd0.2Ce0.8O2-x (GDC) cermet anode, thin GDC electrolyte, and a La0.6Sr0.4Co0.2Fe0.8O3-y (LSCF) and GDC cermet cathode. The fabrication of the cells under investigation are described, and an analysis of the different procedures with emphasis of the innovations with respect to traditional techniques. Such micro-tubular cells were tested using a Test Stand consisting of: a vertical tubular furnace, an electrical load, a galvanostast, gas pipelines, temperature, pressure and flow meters. The tests on the micro-SOFC were performed using hydrogen, to determine the cell polarization. A parametric study is also presented with the scope to analyze the variations of the thermodynamic and electrochemical performances of the cell in function of its operating temperature and fuel flow
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