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Search Results: 1 - 10 of 6650 matches for " Alessandro Scirè "
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Dynamic Modeling of the Electric Transportation Network
Alessandro Scirè,Idán Tuval,Víctor M. Eguíluz
Physics , 2005, DOI: 10.1209/epl/i2004-10533-6
Abstract: We introduce a model for the dynamic self-organization of the electric grid. The model is characterized by a conserved magnitude, energy, that can travel following the links of the network to satisfy nodes' load. The load fluctuates in time causing local overloads that drive the dynamic evolution of the network topology. Our model displays a transition from a fully connected network to a configuration with a non-trivial topology and where global failures are suppressed. The most efficient topology is characterized by an exponential degree distribution, in agreement with the topology of the real electric grid. The model intrinsically presents self-induced break-down events, which can be thought as representative of real black-outs.
Adone Zoli, il mondo cattolico e l’antifascismo fiorentino
Giambattista Sciré
Annali di Storia di Firenze , 2011,
Abstract: Il saggio analizza la figura di Adone Zoli, personalità di spicco del mondo cattolico e dirigente democristiano, nel suo rapporto con l’antifascismo fiorentino, dagli anni Trenta al periodo della Resistenza, della Liberazione e all’immediato secondo dopoguerra. I nuovi documenti qui presentati mettono in luce l’importanza della sua attività politica dentro la Dc fiorentina, il legame tra la Dc locale e la curia fiorentina, le sue relazioni con gli altri membri del Comitato Toscano di Liberazione Nazionale. Ne emerge una figura molto complessa divisa tra una forte fede cristiana e ideali antifascisti profondamente radicati.
Functional fatigue of NiTi Shape Memory wires for a range of end loadings and constraints
G. Scirè Mammano,E. Dragoni
Frattura ed Integrità Strutturale , 2013,
Abstract: The availability of engineering strength data on shape memory alloys (SMAs) under cyclic thermal activation (functional fatigue) is central to the rational design of smart actuators based on these materials. Test results on SMAs under functional fatigue are scarce in the technical literature and the few data available are mainly limited to constant-stress loading. Since the SMA elements used within actuators are normally biased by elastic springs or by another SMA element, their stress state is far from constant in operation. The mismatch between actual working conditions and laboratory arrangements leads to suboptimal designs and undermines the prediction of the actuator lifetime. This paper aims at bridging the gap between experiment and reality. Four test procedures are planned, covering most of the typical situations occurring in practice: constant-stress, constant-strain, constant-stress with limited maximum strain and linear stress-strain variation with limited maximum strain. The paper describes the experimental apparatus specifically designed to implement the four loading conditions and presents fatigue results obtained from commercial NiTi wires tested under all those protocols.
New classification criteria for rheumatoid arthritis
C.A. Scirè,R. Caproali
Reumatismo , 2011, DOI: 10.4081/reumatismo.2010. 159
Abstract: Lo scorso settembre sono stati pubblicati i criteri classificativi 2010 ACR/EULAR per l’artrite reumatoide (AR) (1). La creazione del nuovo set di criteri è stata dettata da due principali motivi: in primo luogo dalla chiara evidenza dell’insufficiente accuratezza diagnostica dei criteri ACR 1987 nel discriminare pazienti con AR nelle fasi precoci di malattia (2); in secondo luogo dalla documentata necessità di una terapia precoce con disease modifying anti-rheumatic drugs (DMARDs) anche in forme di artrite indifferenziata per prevenire l’evoluzione della malattia (3, 4). Il grande elemento di novità emerso è rappresentato dalla formalizzazione di un nuovo concetto di AR. Nel precedente set di criteri del 1987 erano stati inclusi soggetti con diagnosi di AR di lunga durata e soggetti con altre artropatie, infiammatorie e non, ed erano stati testati una serie di criteri per identificare la migliore combinazione in grado di individuare pazienti con AR (5). Il concetto di AR alla base dei criteri classificativi del 1987 valorizzava aspetti di severità di malattia (fase avanzata), quali ad esempio erosioni e presenza di noduli reumatoidi, piuttosto che di sviluppo di malattia (fase precoce)...
Low-dose oral prednisone improves clinical and ultrasonographic remission rates in early rheumatoid arthritis: results of a 12-month open-label randomised study
Carlomaurizio Montecucco, Monica Todoerti, Garifallia Sakellariou, Carlo Scirè, Roberto Caporali
Arthritis Research & Therapy , 2012, DOI: 10.1186/ar3838
Abstract: Two hundred and twenty patients with early RA (< 1 year from clinical onset) were treated according to a low disease activity (LDA) targeted step-up protocol including methotrexate (MTX) and, in the active treatment arm, low-dose (6.25 mg/day) oral PDN over 12 months. Clinical disease activity measures were collected at baseline, 2, 4, 6, 9 and 12 months, and US examination of hands was performed at baseline, 6 and 12 months. Grey-scale and power Doppler (PD) synovitis were scored (0 to 3) for each joint. At 12 months, clinical remission according to the disease activity score among 28 joints was defined as the clinical outcome, and a total joint PD score of 0 (PD negativity) as the imaging outcome.Each group included 110 patients with comparable demographic, clinical, laboratory and US characteristics. At 12 months, the LDA rate was similar in the two groups, whilst the clinical remission rate (risk ratio = 1.61 (95% confidence interval = 1.08, 2.04)) and PD negativity rate (risk ratio = 1.31 (95% confidence interval = 1.04, 1.64)) were significantly higher in the MTX+PDN group.In early RA, despite a similar response rate in terms of LDA, low-dose oral PDN co-medication led to a higher proportion of clinical remission and PD negativity compared with MTX monotherapy, thus ensuring a better disease activity control.Current Controlled Trials ISRCTN2486111Glucocorticoids (GC) in association with conventional disease-modifying anti-rheumatic drugs (DMARDs) are currently recommended for the treatment of rheumatoid arthritis (RA), after a careful evaluation of the patient's risk-to-benefit ratio [1].In RA, GC show a rapid symptomatic effect on pain and general well-being and help in controlling objective signs of inflammation, such as tender and swollen joints [2-4]. Several studies also support disease-modifying properties for GC, in terms of prevention of future joint damage in early RA, both for initial short-term high dosages followed by step-down schedules and for lo
Using the Resistograph to distinguish different types of wood rot on living silver fir in Molise (Italy)
Lasserre B,Motta E,D’Amico L,Scirè M
Forest@ , 2010, DOI: 10.3832/efor0638-007
Abstract: he study was performed in two silver-fir forests (Abies alba Mill.) located in Alto Molise, Province of Isernia: Collemeluccio, near Pescolanciano and Abeti Soprani near Capracotta. The aim of this work was to distinguish different types of wood rot on living silver fir individuals by using the Resistograph (IML-RESI E400), a device that allows to estimate the variation of wood density by measuring the resistance to micro-perforation. The occurrence of different types of wood rot (white rot and brown rot) in living trees was pointed out and discriminated by the device. In the detected deteriorated zones, fungal pathogens and decomposers were isolated and identified, causing either white (Phellinus hartigii, Ganoderma adspersum, Heterobasidion abietinum and Armillaria ostoyae) or brown rot (Fomitopsis pinicola).
Plasma procalcitonin in rheumatic diseases
C.A. Scirè,R. Caporali,C. Perotti,C. Montecucco
Reumatismo , 2011, DOI: 10.4081/reumatismo.2003.113
Abstract: Data on the origin and biological function of procalcitonin, the pro-hormone of calcitonin, are scarce. Since this peptide can be induced in bacterial invasive infections, serum procalcitonin levels may be useful in differential diagnosis of systemic inflammatory response syndrome. This review will focus on the clinical significance of changes in serum procalcitonin levels in patients with connective tissue diseases and other rheumatic disorders.
Characterization of the silicon+6LiF thermal neutron detection technique
A. Pappalardo,M. Barbagallo,L. Cosentino,C. Marchetta,A. Musumarra,C. Scirè,S. Scirè,G. Vecchio,P. Finocchiaro
Physics , 2015,
Abstract: The worldwide need to replace 3He for the neutron detection has triggered R&D on new technologies and methods. A promising one is based on commercial solid state silicon detectors coupled with thin neutron converter layers containing 6Li. After proving the feasibility of this technique, we characterized the behavior of such a detector with different converter layer thicknesses. In this paper we also disentangle other contributions to the overall spectrum shape observed with this kind of detector, proving that its detection efficiency can be made reasonably high and that the gamma/neutron discrimination capability is comparable to the one of 3He tubes.
Policy Research in a Complex Context  [PDF]
Alessandro Colombo
Intelligent Information Management (IIM) , 2010, DOI: 10.4236/iim.2010.211071
Abstract: Today’s world is characterized by uncertainty and complexity. While examining the importance of research in such a context, the paper attempts to outline a first definition of the role and potential of policy research. The policy process itself has become increasingly complex and non linear, as has its relationship with research. Consequently, policy researchers’ contributions to policymakers may not have a direct, punctual and immediate influence on single issues, but rather a more pervasive, interactive, deliberative effect. Focusing on the theoretical definition of the risk, uncertainty and complexity of the policy process today, the paper outlines some questions and puts forward possible answers which offer a starting point for further analysis. It explores a new role for policy research and underlines the opportunities offered by argumentative, deliberative and multidisciplinary approaches which can positively impact democracy.
VaR-Optimal Risk Management in Regime-Switching Jump-Diffusion Models  [PDF]
Alessandro Ramponi
Journal of Mathematical Finance (JMF) , 2013, DOI: 10.4236/jmf.2013.31009
Abstract:

In this paper we study a classical option-based portfolio strategy which minimizes the Value-at-Risk of the hedged position in a continuous time, regime-switching jump-diffusion market, by using Fourier Transform methods. However, the analysis of this hedging strategy, as well as the computational technique for its implementation, is fairly general, i.e. it can be applied to any dynamical model for which Fourier transform methods are viable.

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