1,721,069 research outputs found
L'università italiana in Europa: riflessioni sull'equipollenza dei titoli e sulla libertà di movimento all'interno dell'Unione
No full textn this paper I discuss aspects of the problems arising when a recognition of qualifications for the profession of university professor acquired in foreign states members of the European Union is attempted in Italy. I show that different obstacles still exist to the achievement of the free movement of workers -a fundamental principle of the Union enshrined in article 45 of the Treaty on the functioning of the European Union. In this sense I also comment on the obligation for university professors of Italian university to reside within the municipality of their university
Solving Nonlinear Differential Equations
Full text linkMathematica is great in solving analytically linear differential equations. It is also a good companion for computing numerical solutions to non–linear equations. We attack the reduced–gravity, shallow–water equation (RSE) problem. We compare the analytical solution to our problem without friction to the numerical solution obtained either with Mathematica or via Matlab. We exploit Mathematica ability in solving systems of non-linear Ordinary Differential Equations, on the way to identify some analytical solution to RSE when friction is non-negligible
Doppler effect in physical oceanography. International Symposium Christian Doppler (Salzburg 1803 – Venice 1853): a multidisciplinary legacy
No full textWhat will a new generation of world climate research and computing facilities bring to climate long-term predictions?
No full textBased on issues recently raised on the future of climate science, I present here a critical discussion which embraces the crucial aspects of the communication between climate scientists and laypersons, of the role confusing statements may exert on possible advancements in climate research, and of scientific priorities in climate science. I start distinguishing between different applications of climate models and identifying confusing uses of the words "prediction" and "projection" in recent discussions on climate modeling. Numerical models like those used in climate simulations are not assimilable to truly theories, nor can obtained results be considered as truly experimental evidences. Hence, it is hard to envisage the feasibility of crucial experiments through climate models. Increasing model resolution and complexity, although undoubtedly helpful for many applications related to a deeper understanding of the complex climate system and to substantial improvement of short-term forecasts, is not destined to change this fundamental limitation, to tackle the impossibility of predicting prominent climate forcings and to facilitate result comparisons against observations. Finally, as an example describing possible alternative resource allocations, I propose to devote more energy to strengthen the observational part of climate research, to focus on midterm forecasts, and to implement a new employment policy for climate scientists. In particular, through an increased and truly global in situ and remote sensing climate observing network, crucial experiments could emerge to challenge the fundamental basis of the conjecture of a great anthropogenic climate change, which, as known, is largely based on high climate sensitivities simulated by numerical models. © 2011 Springer-Verlag
Exact analytic solutions of non-linear equations of long waves in case of axially symmetric oscillations of fluid in rotary parabolic basin
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A large abrupt change in the abyssal water masses of the eastern Mediterranean
No full textIn this letter we report observations showing, for the first time, the occurrence of a new, major transformation in the thermohaline cell of the eastern Mediterranean Sea. After 2 decades, during which waters of Aegean origin dominated the abyssal layers of that basin, the Adriatic Sea has returned to represent a major source of Eastern Mediterranean Deep Water (EMDW). The observed characteristics of such water, however, profoundly differ from those observed previously in the abyssal layers of the Ionian basin. In fact, the newly formed EMDW we observed there is saltier, warmer, and denser than EMDW observed before and during the Eastern Mediterranean Transient (EMT). Thus, during the past 2 decades, the thermohaline cell of the eastern Mediterranean, once considered steady, showed two large, abrupt, somehow opposite fluctuations. As in the case of the first one, origins, climatic implications, and fate of this second fluctuation have to be clarified
Nonlinear radial oscillations of an isolated eddy in the ocean with regard for the external action
No full textWithin the framework of an reduced-gravity model of the ocean dynamics, we find a class of exact analytic solutions of the problem of description of nonlinear axisymmetric oscillations of a subsurface eddy under the action of stationary radial mass forces. The radial projection of the velocity of oscillations of this sort is a linear function and the azimuthal velocity, the thickness of the eddy, and the mass forces are polynomials as functions of the radial coordinate with time-dependent coefficients. The method used to find the analytic solution is based on the exact replacement of the original mathematical model by a system of ordinary differential and algebraic equations. A new class of motions of the eddy appears as a result of nonlinear interaction between the lowest mode of oscillations and the geostrophic circulation inside the eddy
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