13,089 research outputs found
Stima dei flussi turbolenti con tecnica LES accoppiata a modelli di bilancio di massa ed energia alla superficie
No full textMABS validation through repeated execution and data mining analysis
No full textAgent Based Modelling is the most interesting and advanced approach for simulating a complex system: in a social context, the single parts and the whole are often very hard to describe in detail. Besides, there are agent based formalisms which allow to study the emergency of social behaviour with the creation and study of models, known as artificial societies. Thanks to the ever increasing computational power, it's been possible to use such models to create software, based on intelligent agents, which aggregate behaviour is complex and difficult to predict, and can be used in open and distributed systems. Data mining is born in the last decades in order to help users in finding useful knowledge from the otherwise overwhelming amount of data available nowadays from the web and the data collected every day by companies. Data Mining techniques can therefore be the keystone to reveal non-trivial knowledge expressed by the initial assumption used to build the micro-level of the model and the structure of the society of agents that emerged from the simulation
Magnetic field and temperature dependence of an atomic force microscope-defined quantum point contact
No full textIl patrimonio cartografico del Servizio Geologico d’Italia conservato presso la biblioteca ISPRA
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RAMS sensitivity to grid spacing and grid aspect ratio in Large-Eddy Simulations of the dry neutral Atmospheric Boundary Layer
No full textLarge Eddy Simulation (LES) is being established as a commonplace modeling tool in many areas of research interested in reproducing Atmospheric Boundary Layer (ABL) turbulence. LES results can however be highly dependent on the combination of the numerical schemes, subgrid scale model and computational grid, and their impact on simulations should be examined. The present work focuses on assessing the impact of grid spacing on LES of an idealized neutral ABL realized with the Regional Atmospheric Modeling System (RAMS), a commonly employed mesoscale model. To this aim, nine simulations with varying grid resolutions and otherwise identical setups have been performed. The grids are obtained combining three different horizontal (64, 32, 16 m) and vertical (16, 8, 4 m) spacings, covering a domain of 4096 × 4096 × 1024 m. Results are post-processed in terms of mean profiles of momentum flux, horizontal velocity and velocity variances, as well as velocity spectra and instantaneous snapshots of velocity fields. The analysis reveals that the turbulent flow can be simulated satisfactorily by employing a computational grid with a sufficiently fine horizontal spacing and an aspect ratio that alleviates potential adverse effects of the combination of RAMS numerics and subgrid model on the solution. Based on the present results, a horizontal spacing smaller than around 30 m is suggested for the examined regime, and an aspect ratio of 4 is recommended, while both larger and smaller values should be avoided. When using different aspect ratios RAMS LESs of the neutral ABL were found to be affected by an excessive dissipation of turbulence kinetic energy
Esposizione professionale ad idrocarburi policiclici aromatici addotti al DNA ed alle proteine
No full textFacades of the Libreria di San Marco in Venice, The: An Interpretation of the Design Process
No full text"A new work in which I propose an interpretation of the design process Sansovino used to create the magnificent facades of the Libreria di San Marco in Venice, a masterpiece of Renaissance architecture." Sent to Marquand librarian by author Dec. 202
La Risonanza Magnetica nella mammella operata
No full textLa RM è eseguita con le stesse metodiche della mammella non operata.ad eccezione dei casi in cui l'impianto protesico debba essere studiato per cui sono necessarie variazioni. Fondamentali per il radiologi le conoscenze delle indicazioni di RM
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