64,358 research outputs found
Utopía y distopía en la narrativa cubana actual: Daniel Díaz Mantilla y Ronaldo Menéndez
No full textIl testo propone uno studio dei principali testi narrativi di Díaz Mantilla e Ménedez, due autori fondamentali dell'attuale panorama cubano
Thermal lattice expansion effect on reactive scattering of H2 from Cu(111) at T(s) = 925 K
No full textSurface phonons and surface temperature may have important effects on reactions of molecules at surfaces, and at present much remains unknown about these effects. A question addressed here, which has received little attention so far, is how reaction at elevated temperature is affected by thermal lattice expansion. To answer this question for the benchmark reaction of H2 and D2 with Cu(111), we have performed quantum and quasi-classical dynamics calculations. The specific reaction parameter (SRP) approach to density functional theory (DFT) has been used to compute the required six-dimensional potential energy surfaces (PES). Computed reaction probabilities and rotational quadrupole alignment parameters have been compared for surface temperatures Ts = 0 and 925 K. Surface thermal expansion of the lattice leads to a considerable decrease of reaction barrier heights and thereby to increased reaction probabilities as well as decreased rotational quadrupole alignment parameter values in associative desorption
Integral approximations for computing optimum designs in random effects logistic regression models
No full textIn the context of nonlinear models, the analytical expression of the Fisher information matrix is essential to compute optimum designs. The Fisher information matrix of the random effects logistic regression model is proved to be equivalent to the information matrix of the linearized model, which depends on some integrals. Some algebraic approximations for these integrals are proposed, which are consistent with numerical integral approximations but much faster to be evaluated. Therefore, these algebraic integral approximations are very useful from a computational point of view. Locally D-, A-, c-optimum designs and the optimum design to estimate a percentile are computed for the univariate logistic regression model with Gaussian random effects. Since locally optimum designs depend on a chosen nominal value for the parameter vector, a Bayesian D-optimum design is also computed. In order to find Bayesian optimum designs it is essential to apply the proposed integral approximations, because the use of numerical approximations makes the computation of these optimum designs very slow
Erratum to: Effect of moderate red wine intake on cardiac prognosis after recent acute myocardial infarction of subjects with Type 2 diabetes mellitus (Diabetic Medicine, (2006), 23, 9, (974-981), 10.1111/j.1464-5491.2006.01886.x)
No full textIn an article by Marfella et al, the author name C. Saron is incorrect and should be listed as C. Sardu. Therefore the correct author list is: R. Marfella, F. Cacciapuoti, M. Siniscalchi, F. C. Sasso, F. Marchese, F. Cinone, E. Musacchio, M. A. Marfella, L. Ruggiero, G. Chiorazzo, D. Liberti, G. Chiorazzo, G. F. Nicoletti, C. Sardu, F. D'Andrea, C. Ammendola, M. Verza and L. Coppola.In an article by Marfella et al, the author name C. Saron is incorrect and should be listed as C. Sardu. Therefore the correct author list is: R. Marfella, F. Cacciapuoti, M. Siniscalchi, F. C. Sasso, F. Marchese, F. Cinone, E. Musacchio, M. A. Marfella, L. Ruggiero, G. Chiorazzo, D. Liberti, G. Chiorazzo, G. F. Nicoletti, C. Sardu, F. D'Andrea, C. Ammendola, M. Verza and L. Coppola
Uniform-in-time boundedness in a class of local and nonlocal nonlinear attraction–repulsion chemotaxis models with logistics
No full textThe following fully nonlinear attraction-repulsion and zero-flux chemotaxis model is studied:{u(t)= del center dot((u + 1)(m1-1)del u - chi u(u+1)(m2-1)del v+xi u(u+ 1)(m3-1)del w) + lambda u - mu u in Omega x (0, T-max),(lozenge)tau v(t) = Delta v-phi(t, v) +f(u) in Omega x (0, T-max),tau w(t) = Delta w - psi(t, w) +g(u) in Omega x (0, T-max).Herein, Omega is a bounded and smooth domain of R-n, for n is an element of N, chi, xi, lambda, mu, r proper positive numbers, m(1), m(2), m(3) is an element of R, and f(u) and g(u) regular functions that generalize the prototypes f(u) similar or equal to u(k) and g(u) similar or equal to ul, for some k, l > 0 and all u >= 0. Moreover, tau is an element of {0, 1}, and T-max is an element of (0, infinity] is the maximalinterval of existence of solutions to the model. Once suitable initial data u(0)(x), tau v(0)(x), tau w(0)(x) are fixed, we are interested in deriving sufficient conditions implying globality (i.e., T-max= infinity) and boundedness (i.e., parallel to u(center dot, t)parallel to(L infinity(Omega)) + parallel to v(center dot, t)parallel to(L infinity(Omega)) + parallel to w(center dot, t)parallel to(L infinity(Omega)) <= C for all t is an element of (0, infinity)) of solutions to problem (lozenge). This is achieved in the following scenarios:For phi(t, v) proportional to v and psi(t, w) to w, whenever tau = 0 and provided one of thefollowing conditions(I) m(2) + k < m(3) + l, (II) m(2) +
Revistas Extranjeras
No full textSi rassegnano criticamente gli ultimi sei mesi delle riviste straniere. Il mio contributo si basa sul selezionare criticamente 5-8 contributi nelle riviste di common law, in concreto: Cambridge Law Journal, The Law Quarterly Review, The Modern Law Review, Oxford Journal of Legal Studies, American Journal of Comparative Law, Columbia Law Review, Harvard Law Review, Tulane Law Review, Yale Law Journal, California Law Review
Some basic mathematical elements on steel heat treating: modeling, freeware packages and numerical simulation
No full textMathematical modelling of heat treatment for a steering rack including mechanical effects
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