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Competition between biological species in marine environments is affected by the motion of the surrounding fluid. An effective 2D compressibility can arise, for example, from the convergence and divergence of water masses at the depth at which passively traveling photosynthetic organisms are… |
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We study by means of an Eulerian-Lagrangian model the statistical properties of velocity and acceleration of a neutrally-buoyant finite-sized particle in a turbulent flow statistically homogeneous and isotropic. The particle equation of motion, besides added mass and steady Stokes drag, keeps into… |
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We study the numerical approximation of solutions for parabolic
integro-differential equations (PIDE). Similar models arise in option pricing,
to generalize the Black-Scholes equation, when the processes which
generate the underlying stock returns may contain both a continuous part
and jumps. Due… |
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In this paper, a reaction-diffusion prey-predator system including the fear effect of predator on prey population and group defense has been considered. The conditions for the onset of cross-diffusion-driven instability are obtained by linear stability analysis. The… |
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A contrast enhanced dynamic Magnetic Resonance clinical exam
produces a set of images displaying over time the concentration of a
contrast agent in the blood stream of an organ. The portion of
tissue represented by each pixel can be classified as normal,
benign or malignant tumoral, according to… |
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In the present paper, we propose a numerical method for the simultaneous approximation of the finite Hilbert and Hadamard transforms of a given function f, supposing to know only the samples of f at equidistant points. As reference interval we consider [-1,1] and as approximation tool we use… |
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Tombe aristocratiche dall'acropoli di Monte Sannace. Indagini sulle strutture, sui contesti e sulle decorazioni dipinte |
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A new fast and accurate tissue typing technique has recently been successfully applied to prostate MR spectroscopic imaging (MRSI) data. This technique is based on canonical correlation analysis (CCA), a statistical method able to simultaneously exploit the spectral and spatial information… |
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The optimal Orlicz target space is exhibited for embeddings of fractional-order Orlicz-Sobolev spaces in $R^n$. An improved embedding with an Orlicz-Lorentz target space, which is optimal in the broader class of all rearrangement-invariant spaces, is also established. Both spaces of order s in (0,… |
