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Search Results: 1 - 10 of 3259 matches for " Enrico Bernardi "
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Counterexamples to $ C^{\infty} $ well posedness for some hyperbolic operators with triple characteristics
Enrico Bernardi,Tatsuo Nishitani
Mathematics , 2014,
Abstract: In this paper we prove that for a class of non-effectively hyperbolic operators with smooth triple characteristics the Cauchy problem is well posed in the Gevrey 2 class, beyond the generic Gevrey class $ 3/2 $ (see e.g. \cite{Bro}). Moreover we show that this value is optimal.
Update on the clinical use of the low-molecular-weight heparin, parnaparin
Giuseppe Camporese, Enrico Bernardi, Franco Noventa
Vascular Health and Risk Management , 2009, DOI: http://dx.doi.org/10.2147/VHRM.S3430
Abstract: ate on the clinical use of the low-molecular-weight heparin, parnaparin Review (3452) Total Article Views Authors: Giuseppe Camporese, Enrico Bernardi, Franco Noventa Published Date September 2009 Volume 2009:5 Pages 819 - 831 DOI: http://dx.doi.org/10.2147/VHRM.S3430 Giuseppe Camporese1, Enrico Bernardi2, Franco Noventa3 1Unit of Angiology and 3Department of Clinical and Experimental Medicine, Clinical Epidemiology Group, University Hospital of Padua, Italy; 2Department of Emergency and Accident Medicine, Hospital of Conegliano Veneto, Italy Abstract: Parnaparin is a low-molecular-weight heparin that has widely shown its efficacy and safety in prevention of venous thromboembolism, in the treatment of chronic venous disorders, and in the treatment of venous and arterial (stable and unstable angina, acute ST-segment elevation myocardial infarction) thrombosis. Parnaparin at the respective dosages of 3200, 4250, 6400, or 12800 IUaXa for a period ranging from 3 to 5 days to 6 months, is usually administered subcutaneously by means of once-daily regimen and is better tolerated than unfractionated heparin at the injection site. In the variety of commercially available low-molecular-weight heparins, parnaparin represents a useful therapeutic option, even though little evidence is available comparing the superiority or the equivalent efficacy and safety of parnaparin to that of the unfractionated heparin or placebo. This review summarizes the available literature on the use of parnaparin in different settings of cardiovascular diseases, including papers published during the past year and ongoing studies.
Update on the clinical use of the low-molecular-weight heparin, parnaparin
Giuseppe Camporese,Enrico Bernardi,Franco Noventa
Vascular Health and Risk Management , 2009,
Abstract: Giuseppe Camporese1, Enrico Bernardi2, Franco Noventa31Unit of Angiology and 3Department of Clinical and Experimental Medicine, Clinical Epidemiology Group, University Hospital of Padua, Italy; 2Department of Emergency and Accident Medicine, Hospital of Conegliano Veneto, ItalyAbstract: Parnaparin is a low-molecular-weight heparin that has widely shown its efficacy and safety in prevention of venous thromboembolism, in the treatment of chronic venous disorders, and in the treatment of venous and arterial (stable and unstable angina, acute ST-segment elevation myocardial infarction) thrombosis. Parnaparin at the respective dosages of 3200, 4250, 6400, or 12800 IUaXa for a period ranging from 3 to 5 days to 6 months, is usually administered subcutaneously by means of once-daily regimen and is better tolerated than unfractionated heparin at the injection site. In the variety of commercially available low-molecular-weight heparins, parnaparin represents a useful therapeutic option, even though little evidence is available comparing the superiority or the equivalent efficacy and safety of parnaparin to that of the unfractionated heparin or placebo. This review summarizes the available literature on the use of parnaparin in different settings of cardiovascular diseases, including papers published during the past year and ongoing studies.Keywords: low-molecular-weight heparin, heparin, parnaparin, acute coronary syndromes, venous thromboembolism
Higher secant varieties of $\mathbb{P}^n \times \mathbb{P}^m$ embedded in bi-degree $(1,d)$
Alessandra Bernardi,Enrico Carlini,Maria Virginia Catalisano
Mathematics , 2010, DOI: 10.1016/j.jpaa.2011.04.005
Abstract: Let $X^{(n,m)}_{(1,d)}$ denote the Segre-Veronese embedding of $\mathbb{P}^n \times \mathbb{P}^m$ via the sections of the sheaf $\mathcal{O}(1,d)$. We study the dimensions of higher secant varieties of $X^{(n,m)}_{(1,d)}$ and we prove that there is no defective $s^{th}$ secant variety, except possibly for $n$ values of $s$. Moreover when ${m+d \choose d}$ is multiple of $(m+n+1)$, the $s^{th}$ secant variety of $X^{(n,m)}_{(1,d)}$ has the expected dimension for every $s$.
Cauchy problem for hyperbolic operators with triple characteristics of variable multiplicity
Enrico Bernardi,Antonio Bove,Vesselin Petkov
Mathematics , 2010,
Abstract: We study a class of third order hyperbolic operators $P$ in $G = \Omega \cap \{0 \leq t \leq T\},\: \Omega \subset \R^{n+1}$ with triple characteristics on $t = 0$. We consider the case when the fundamental matrix of the principal symbol for $t = 0$ has a couple of non vanishing real eigenvalues and $P$ is strictly hyperbolic for $t > 0.$ We prove that $P$ is strongly hyperbolic, that is the Cauchy problem for $P + Q$ is well posed in $G$ for any lower order terms $Q$.
Cauchy problem for effectively hyperbolic operators with triple characteristics of variable multiplicity
Enrico Bernardi,Antonio Bove,Vesselin Petkov
Mathematics , 2013, DOI: 10.1142/S0219891615500162
Abstract: We study a class of third order hyperbolic operators $P$ in $G = \{(t, x):0 \leq t \leq T, x \in U \Subset {\mathbb R}^{n}\}$ with triple characteristics at $\rho = (0, x_0, \xi), \xi \in {\mathbb R}^n \setminus \{0\}$. We consider the case when the fundamental matrix of the principal symbol of $P$ at $\rho$ has a couple of non-vanishing real eigenvalues. Such operators are called {\it effectively hyperbolic}. V. Ivrii introduced the conjecture that every effectively hyperbolic operator is {\it strongly hyperbolic}, that is the Cauchy problem for $P + Q$ is locally well posed for any lower order terms $Q$. This conjecture has been solved for operators having at most double characteristics and for operators with triple characteristics in the case when the principal symbol admits a factorization. A strongly hyperbolic operator in $G$ could have triple characteristics in $G$ only for $t = 0$ or for $t = T$. We prove that the operators in our class are strongly hyperbolic if $T$ is small enough. Our proof is based on energy estimates with a loss of regularity.
Realization of a diamond based high density multi electrode array by means of deep ion beam lithography
Federico Picollo,Alfio Battiato,Ettore Bernardi,Luca Boarino,Emanuele Enrico,Jacopo Forneris,Daniele Gatto Monticone,Paolo Olivero
Physics , 2014, DOI: 10.1016/j.nimb.2014.11.119
Abstract: In the present work we report about a parallel-processing ion beam fabrication technique whereby high-density sub-superficial graphitic microstructures can be created in diamond. Ion beam implantation is an effective tool for the structural modification of diamond: in particular ion-damaged diamond can be converted into graphite, therefore obtaining an electrically conductive phase embedded in an optically transparent and highly insulating matrix. The proposed fabrication process consists in the combination of Deep Ion Beam Lithography (DIBL) and Focused Ion Beam (FIB) milling. FIB micromachining is employed to define micro-apertures in the contact masks consisting of thin (<10 um) deposited metal layers through which ions are implanted in the sample. A prototypical single-cell biosensor was realized with the above described technique. The biosensor has 16 independent electrodes converging inside a circular area of 20 um diameter (typical neuroendocrine cells size) for the simultaneous recording of amperometric signals.
Geostatistical Modeling of Uncertainty for the Risk Analysis of a Contaminated Site  [PDF]
Enrico Guastaldi
Journal of Water Resource and Protection (JWARP) , 2011, DOI: 10.4236/jwarp.2011.38066
Abstract: This work is a study of multivariate simulations of pollutants to assess the sampling uncertainty for the risk analysis of a contaminated site. The study started from data collected for a remediation project of a steel- works in northern Italy. The soil samples were taken from boreholes excavated a few years ago and analyzed by a chemical laboratory. The data set comprises concentrations of several pollutants, from which a subset of ten organic and inorganic compounds were selected. The first part of study is a univariate and bivariate sta- tistical analysis of the data. All data were spatially analyzed and transformed to the Gaussian space so as to reduce the effects of extreme high values due to contaminant hot spots and the requirements of Gaussian simulation procedures. The variography analysis quantified spatial correlation and cross-correlations, which led to a hypothesized linear model of coregionalization for all variables. Geostatistical simulation methods were applied to assess the uncertainty. Two types of simulations were performed: correlation correction of univariate sequential Gaussian simulations (SGS), and sequential Gaussian co-simulations (SGCOS). The outputs from the correlation correction simulations and SGCOS were analyzed and grade-tonnage curves were produced to assess basic environmental risk.
Perturbation of Hydrogen Degenerate Levels and SO(4)  [PDF]
Enrico Onofri
Journal of Modern Physics (JMP) , 2014, DOI: 10.4236/jmp.2014.512106
Abstract:

We present a short note about the perturbative correction to Rydberg energies under a perturbation cosθ/rμ and discuss the role of SO(4) symmetry.

Seguridad y Derecho Penal en Italia y en la Unión Europea.
Alessandro Bernardi.,Alessandro Bernardi.
Política criminal , 2010,
Abstract: El autor ofrece un panorama completo de las relaciones existentes entre seguridad y derecho penal, tanto en Italia como en la Unión Europea. Para ello desarrolla primero un marco conceptual, en el que distingue básicamente dos acepciones de la idea de “seguridad”: una menos liberal, vinculada a la idea de “seguridad pública”, entendiendo la seguridad como un fin que justificaría limitaciones a los derechos y libertades; y una acepción más liberal, que entiende la seguridad como un bien merecedor de protección o como un derecho de las personas. A continuación, el autor ilustra el modo en el que dichas concepciones se han plasmado en concreto, comparativamente, en la política criminal italiana y de la Unión Europea (haciéndose cargo de la situación legislativa y jurisprudencial), para concluir con una toma de posición personal, favorable en general a una concepción más liberal de seguridad en el campo penal.
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