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Digital Lending manuale. Bilancio di un caso concreto
No full textL'evento è promosso dall'AIB (Associazione Italiana Biblioteche) Sezione Sardegna, e organizzato in collaborazione con Sardegna Ricerche.Nell’ottobre 2011 il Sistema Bibliotecario Interurbano del Sulcis (S.B.I.S.) ha lanciato un nuovo servizio di Digital Lending manuale. Il servizio è stato concepito in funzione di una alfabetizzazione digitale dell’utenza, attraverso la dotazione di device dedicati e nella prospettiva futura di giungere a un digital lending vero e proprio. Nella presentazione del progetto vengono illustrati i problemi affrontati e le relative soluzioni, con particolare attenzione ai device e alla difficoltà nell’acquisto degli ebook in un mercato per larga parte precluso alle biblioteche; per ultimo, attraverso l’analisi dei questionari proposti agli utenti, viene fatto un primo bilancio dell’iniziativa.2012-04-20Sardegna Ricerche, Edificio 2, Località Piscinamanna 09010 Pula (CA) - ItaliaIl digital lending in biblioteca: quando (se) il futuro non aspett
Una semplice relazione fra proprietà di trasporto e struttura di un mezzo poroso
No full textCollana seminari interni 2012, Number 20120307.Viene presentato un modello geometrico, che lega le proprietà di trasporto in un mezzo poroso alla sua porosità e ad un fattore di forma che ne caratterizza la struttura. Al variare del fattore di forma, si riesce a descrivere una gran varietà di mezzi porosi, da quelli non "tortuosi" a quelli molto tortuosi con limiti di percolazione, con innumerevoli applicazioni
Inferring the functional role of microRNAs from gene expression data
Full text linkCollana seminari interni 2012, Number 20120704.MicroRNAs are short non coding RNA sequences that have emerged as a key mechanism for the regulation of a wide range of biological processes by targeting multiple genes for degradation and translation inhibition. Although new microRNAs are continually discovered, the biological role of most of them still remains unclear. One major challenge for the comprehension of miRNA functions resides in the prediction of target mRNAs, which is generally based on physical and evolutionary properties of the target sites. In this seminar, the functional role of miRNAs and the computational strategies for the identification of their putative targets will be described. As a case study, we will show the results obtained from an integrated analysis of miRNA-target expression data collected during the cellular differentiation process
On the representation of incompressible Newtownian free-surface CFD flows
Full text linkThis paper presents an attempt to develop a comprehensive representation of two components incompressible Newtonian flows. The primary target is to have insight on how to improve the CFD simulations of free-surface flows so as to deal with very high density ratios. First, the Navier-Stokes equations of a fluid with two immiscible components is derived from the single component equations. In this case, the surface tension does not come from the equations and must be added externally. Second we shortly review the Cahn-Hilliard and Allen-Cahn equations describing a phase separation process, and the phenomenological relation with surface-tension phenomena. Third, we build phase momentum equations which are consistent with the classical Navier-Stokes equations, but this time for miscible fluids. The concept of energy conservation applied separately to the phases is systematically used to build the phase momentum forces, with a particular regard to the surface tension. Fourth, by use of a dynamical equilibrium assumption and a specifi c splitting of the energies and their derived force, we retrieve the basic properties of the phase transport equations. The method is extended to the surface tension and to the baro-di ffusion. The relation between the phase forces and diffusion fluxes is clarified. Finally, a complete and consistent set of equations is provided and discussed
Basic set of equations for high density ratio free surface flow in the VOF framework
Full text linkProceedings, Number 20120207.Presentation made at the workshop.2012-02-06Ljubljana1st THINS Cluster Workshop: CFD cluste
Automated moving mesh techniques and re-meshing strategies in CFD applications using morphing and rigid motions
Full text linkReport on activity presented to RAS.The presence of moving meshes when motions of fluids and solids are being simulated requires a good control of the topological deformations that can take place both into the surface mesh and into the volume cells. The work done in getting the control of the mesh morphing techniques in CFD applications of fluid-structure interactions and rigid bodies motions is here presented. The effects of imposed rigid body motions on a fluid mesh surrounding or surrounded by a solid body are analysed. Surface boundary mesh extraction and CAD geometry updating strategies for the preservation of a good quality mesh during the calculation are investigated and developed. Java programming is employed in order to automate the process of re-meshing to avoid degeneration
Uomini o gadget? Accesso aperto e beni comuni
Full text linkLa rete, rendendo facile la pubblicazione, può aiutarci a uscire dalla povertà. Internet, però, non è esente da posizioni dominanti: come ha mostrato Jaron Lanier, il ruolo giocato, nella pubblicazione scientifica, dalle multinazionali editoriali passa ad aggregatori come i motori di ricerca e le reti sociali proprietarie. In entrambi i casi qualcosa che nasce gratuito viene sfruttato per il proprio marketing e per il proprio profitto.
La pubblicazione ad accesso aperto usa le rete e il software libero per abbattere le barriere economiche che separano l’autore dal lettore. Le riviste ad accesso aperto possono dunque essere gratuite per chi le legge e per chi ci scrive.2012-10-25Teatro MiniMax, Via De Magistris 12 - Cagliari - ItaliaIl marchio della scientificità - Pubblicazioni scientifiche ed accesso aperto alla conoscenz
Il marchio nel web 2.0
Full text linkIl seminario "Brand 2.0" è un'iniziativa realizzata nell'ambito della collaborazione tra l'Ufficio per l'Armonizzazione nel Mercato Interno (UAMI) e gli uffici per la Proprietà Industriale e organizzata con la collaborazione del Consorzio Camerale per il credito e la finanza.L'intervento affronterà le problematiche sull'uso del brand nelle reti sociali (cosiddetti social network) dove è divenuto un mezzo di comunicazione a 360 gradi.2012-07-06Istituto Europeo di Design (IED), Aula Magna - Viale Trento 39, CagliariBrand 2.
CFD Analysis of a MILD Low-Nox burner for the Oil and Gas industry
Full text linkCollana seminari interni 2012, Number 20120507.Within the Industria 2015 Energy Efficiency Call of the Italian Ministry of Economic Development the Process Engineering and Combustion Group (PEC) at CRS4 is performing the CFD analysis of a MILD Low-Nox burner for the Oil and Gas industry (30 MWth). Our aim is to replicate the rig experiment by numerical simulation to have the control of the driving parameters that affect the combustion process in the entire boiler. The manufacturer tested the burner at Gioia del Colle (Italy) and reported data when operating at maximum load. We exploited the power of STAR-CCM+ to investigate the process. At first we run a non-reacting simulation. Results showed a supercritical throttling of the fuel at the injection in the flue recirculation system. We loaded then the combustion, radiation and heat transfer modules of STAR-CCM+. We calculated the reacting flow solution. Flow features within the combustion chamber and the heat transfer at the walls were estimated. Our results show that STAR-CCM+ is capable to give a detailed description of the process
Optimization of Heliostat Fields for Solar Tower Systems
Full text linkIn this work, a geometrical model is used to evaluate the sun radiation reflected from the heliostats toward
the aim point on the tower top, by taking into account the shading and blocking between neighboring
heliostats. This results in an analytical expression for the heliostats efficiency, which can provide very useful
informations for the optimization of the heliostat field. In particular, we obtain a very simple and exact
expression of the maximal energy collectable by the solar field and present effective strategies to reach such
maximum.2012-09-11Perpignan, Morocco, Marrakech; 2012Proceedings of the 18th International SolarPaces Symposiu