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Search Results: 1 - 10 of 16802 matches for " Vito Andrea Giorgio "
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I2V Highway and Urban Vehicular Networks: A Comparative Analysis of the Impact of Mobility on Broadcast Data Dissemination
Stefano Busanelli,Gianluigi Ferrari,Vito Andrea Giorgio
Journal of Communications , 2011, DOI: 10.4304/jcm.6.1.87-100
Abstract: In this paper, we consider the problem of disseminating data in Infrastructure-to-Vehicular (I2V) IEEE 802.11 networks. We analyze, with acomparative approach, the performance in highway and urban scenarios.In particular, after characterizing the mobility in these scenarios we analyze the performance in terms of data dissemination from a fixed Road Side Unit (RSU) to the vehicles passing in its proximity through a recently proposed multihop probabilistic broadcasting protocol, namely Irresponsible Forwarding (IF). In the case of highway-like Vehicular Ad-Hoc NETworks (VANETs), we first characterize a mobile scenario in such a way to make a direct comparison with a static scenario meaningful, taking into account a physical characterization of the network (e.g., in termsof vehicle spatial density). Then, we consider a few mobile urban scenarios, characterized by the presence of junctions regulated byTraffic Lights (TLs) and Roundabouts (Rs). Our results show that, from a single packet perspective, the vehicles' mobility does not affect the behavior of the IF protocol, at least in the considered mobile scenarios (both highway and urban). However, different conclusions are reached when an information flow (i.e., a series of consecutive packets) is considered. In this context, we determine the maximum amount of data which can be transferred from the RSU to the mobile vehicles passing through a certain Region Of Interest (ROI) around the RSU.
Effect of Different Irrigating Solutions and Endodontic Sealers on Bond Strength of the Dentin - Post Interface with and without Defects
Felice R. Grassi, Carmine Pappalettere, Mariasevera Di Comite, Massimo Corsalini, Giorgio Mori, Andrea Ballini, Vito Crincoli, Francesco Pettini, Biagio Rapone, Antonio Boccaccio
International Journal of Medical Sciences , 2012,
Abstract: Aims. To investigate how the interfacial shear strength of the dentin - post interface with and without defects changes for different combinations irrigant/sealer. Methods. In forty human decoronated and instrumented teeth, fibreglass posts were inserted. The obtained root segments were randomly assigned to four different groups according to the irrigant adopted and the cement used to seal the root canal. The root segments were processed for metyl-methacrylate embedding. Serial sections were obtained and submitted to histomorphometric analyses in order to observe any defect of adhesion at the dentin - post interface and to measure the defects' dimension. The serial sections were also submitted to micro-push-out test. The measured shear strength values were subjected to statistical analysis by one-way ANOVA. The values of bond strength determined for the defective samples were correlated with the dimension of the defects. Finite element models were built to interpret and corroborate the experimental findings. Results. ANOVA showed that the generic combination irrigant/sealer does not affect the interfacial shear strength values. The bond strength of the samples without defects was averagely twice as large as that of the defective samples. The defects occupying more than 12 % of the total transverse section area of the endodontic cement layer led to a reduction of the bond strength of about 70 %. The predictions of the finite element models were in agreement with the experimental results. Conclusion. Defects occupying less than 2 % of the total transverse section area of the cement layer were shown to be acceptable as they have rather negligible effects on the shear strength values. Technologies/protocols should be developed to minimize the number and the size of the defects.
Dynamical Quasi-Stationary States in a system with long-range forces
Vito Latora,Andrea Rapisarda
Physics , 2000, DOI: 10.1016/S0960-0779(01)00021-2
Abstract: The Hamiltonian Mean Field model describes a system of N fully-coupled particles showing a second-order phase transition as a function of the energy. The dynamics of the model presents interesting features in a small energy region below the critical point. In particular, when the particles are prepared in a ``water bag'' initial state, the relaxation to equilibrium is very slow. In the transient time the system lives in a dynamical quasi-stationary state and exhibits anomalous (enhanced) diffusion and L\'evy walks. In this paper we study temperature and velocity distribution of the quasi-stationary state and we show that the lifetime of such a state increases with N. In particular when the $N\to \infty$ limit is taken before the $t \to \infty$ limit, the results obtained are different from the expected canonical predictions. This scenario seems to confirm a recent conjecture proposed by C.Tsallis.
Lapatinib, a TKI Dual Inhibitor of Her1 and Her2 Receptors: Review of the Literature  [PDF]
Vito Lorusso, Ilaria Marech, Marianna Giampaglia, Antonio Gnoni, Andrea Tinelli
Journal of Cancer Therapy (JCT) , 2012, DOI: 10.4236/jct.2012.36148
Abstract: Lapatinib ditosylate (Tyverb?) is a potent and selective oral dual receptor tyrosine kinase inhibitor (TKI), preventing autophosphorylation of epidermal growth factor receptor (EGFR/ErbB1) and human epidermal growth factor receptor 2 (HER2/ErbB2) intracellular domain. This interference blocks the Ras/Raf MAPKs and PI3K/Akt pathways, that lead to uncontrolled cellular proliferation and survival. After the demonstration of its effectiveness and safety in HER2-overexpressed breast cancer, in 2007 the US Food and Drug Administration (FDA) approved this molecule in combination with capecitabine, in patients with locally advanced or metastatic disease, that progressed after previous treatment with anthracyclines, taxanes and trastuzumab. In 2010, Lapatinib received approval for the treatment of postmenopausal women with hormone receptor positive metastatic breast cancer in combination with letrozole. The most common adverse events (AE) are: anorexia, insomnia, diarrhea and skin rash and mild cardiovascular toxicity. This paper reviews the most important studies on Lapatinib in advanced breast cancer. However, promising results were recently reported on this drug, also in adjuvant setting and in combination with other target drugs, which warrant further investigation for the future.
Tools for Assessing Neuropathic Pain
Giorgio Cruccu ,Andrea Truini
PLOS Medicine , 2009, DOI: 10.1371/journal.pmed.1000045
Abstract:
On the Nature of Hidden Broad Line Regions in Seyfert 2 Galaxies
Andrea Martocchia,Giorgio Matt
Physics , 2002,
Abstract: We consider the sample of Tran (2001) to study the X-ray properties of Seyfert 2 galaxies with and without polarized broad lines.
Multi-surface coding simulations of the restricted solid-on-solid model in four dimensions
Andrea Pagnani,Giorgio Parisi
Physics , 2012, DOI: 10.1103/PhysRevE.87.010102
Abstract: We study the Restricted Solid on Solid (RSOS) model for surface growth in spatial dimension d=4 by means of a multi-surface coding technique that allows to analyze samples to analyze samples of size up to $256^4$ in the steady state regime. For such large systems we are able to achieve a controlled asymptotic regime where the typical scale of the fluctuations are larger than the lattice spacing used in the simulations. A careful finite-size scaling analysis of the critical exponents clearly indicate that d=4 is not the upper critical dimension of the model.
Monge-Ampere equations and moduli spaces of manifolds of circular type
Giorgio Patrizio,Andrea Spiro
Mathematics , 2007,
Abstract: A (bounded) manifold of circular type is a complex manifold M of dimension n admitting a (bounded) exhaustive real function u, defined on M minus a point x_o, so that: a) it is a smooth solution on $M\setminus {x_o}$ to the Monge-Amp\`ere equation $(d d^c u)^n = 0$; b) x_o is a singular point for u of logarithmic type and e^u extends smoothly on the blow up of M at x_o; c) $d d^c (e^u) >0$ at any point of $M\setminus {x_o}$. This class of manifolds naturally includes all smoothly bounded, strictly linearly convex domains and all smoothly bounded, strongly pseudoconvex circular domains of $\bC^n$. The moduli spaces of bounded manifolds of circular type are studied. In particular, for each biholomorphic equivalence class of them it is proved the existence of an essentially unique manifold in normal form. It is also shown that the class of normalizing maps for an n-dimensional manifold M is a new holomorphic invariant with the following property: it is parameterized by the points of a finite dimensional real manifold of dimension n^2 when M is a (non-convex) circular domain while it is of dimension $n^2 + 2 n$ when M is a strictly convex domain. New characterizations of the circular domains and of the unit ball are also obtained.
Foliations by stationary disks of almost complex domains
Giorgio Patrizio,Andrea Spiro
Mathematics , 2009,
Abstract: We study the problem of existence of stationary disks for domains in almost complex manifolds. As a consequence of our results, we prove that any almost complex domains which is a small deformations of a strictly linearly convex domain $D \subset C^n$ with standard complex structure admits a singular foliation by stationary disks passing through any given internal point. Similar results are given for foliation by stationary disks through a given boundary point
Modular data and regularity of Monge-Ampère exhaustions and of Kobayashi distance
Giorgio Patrizio,Andrea Spiro
Mathematics , 2014,
Abstract: Regularity properties of intrinsic objects for a large class of Stein Manifolds, namely of Monge-Amp\`ere exhaustions and Kobayashi distance, is interpreted in terms of modular data. The results lead to a construction of an infinite dimensional family of convex domains with squared Kobayashi distance of prescribed regularity properties. A new sharp refinement of Stoll's characterization of $\mathbb C^n$ is also given.
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