1,720,962 research outputs found
Effetto della salinità sulla composizione polifenolica del pomodoro durante la conservazione
No full textDemonstrative Application of CFD Best Practice Guidelines to a Simple Pressure Drop Problem
No full textThe need of Best Practice Guidelines and their systematic use in Computational Fluid Dynamics problems for Nuclear Reactor Safety is being recognized by a growing community during the last few years. Particular care must be taken in problem definition, grid development and set-up of calculations in order to obtain good quality results. Error analysis and estimation are key steps in evaluating the accuracy and the efficiency of the solution. On the other hand available time and computer resources restrict the rigor in estimation of discretization error. This paper presents a rigorous application of Best Practice Guidelines to a simple pressure drop problem found in literature in order to assess the capabilities and limitations of such a method
Report sull’accoppiamento di codici CFD e codici di sistema
Full text linkThis report describes the work performed by the Gruppo di Ricerca Nucleare di San Piero a Grado (GRNSPG) of the University of Pisa (as member of CIRTEN consortium) in the frame of the “Accordo di Programma MSE-ENEA sulla Ricerca di Sistema Elettrico - Piano Annuale di Realizzazione 2013”. The objective of the performed activity was to further contribute to the qualification and improvement of the CFD/system-code coupling tool that had previously been developed in the framework of PAR 2011 and PAR 2012 by the same working group. The scientific and technological relevance of such contribution relies on the fact that the availability of qualified thermal-hydraulic analysis tools and methodologies, which combine multi-scale simulation capabilities, allows a more accurate analysis of nuclear reactor cooling systems (to support both design and safety assessment) in those cases featuring a close interaction between system-scale phenomena (e.g. the natural circulation in a nuclear reactor cooling loop) and local and inherently three-dimensional phenomena (e.g. the heat transfer between coolant and fuel rods, etc.)
Differential responses of antioxidants to salt stress in berries of wild type and non-ripening tomato mutant
No full textVerifica e validazione preliminare sull'accoppiamento del codice di calcolo RELAP5-3D e il codice di fluidodinamica computazionale ANSYS CFX
Full text linkThis report describes the work performed by the Gruppo di Ricerca Nucleare di San Piero a Grado (GRNSPG) of the University of Pisa (member of CIRTEN consortium) in the frame of the “Accordo di Programma MSE-ENEA sulla Ricerca di Sistema Elettrico - Piano Annuale di Realizzazione 2014”, particularly Project B.3.1, Task LP2.c.1_e. Aim of the work was to further improve and qualify a software interface that allows performing CFD-system code simulations, which had been developed by the same working group during previous PARs. Namely, the coupling tool was parallelized, so as to dramatically improve the cost-effectiveness of the coupled simulations compared to “serial” runs, and further Verification and Validation work was carried out by the simulation of experimental tests dealing with natural and assisted circulation of liquid metals in closed loops
Evoluzione dei polifenoli durante la maturazione di differenti cvs di pomodoro irrigate con acqua di mare
No full textAccoppiamento di codici CFD e codici di sistema
Full text linkThis report describes the work performed by the Gruppo di Ricerca Nucleare di San Piero a Grado (GRNSPG) of the University of Pisa (as member of CIRTEN consortium) in the frame of the “Accordo di Programma MSE-ENEA sulla Ricerca di Sistema Elettrico - Piano Annuale di Realizzazione 2012”. In particular, this report constitutes the deliverable LP2.c.1_d of the corresponding activity scheduled in “Linea Progettuale 2” of Project B.3.1. The activity deals with the development and improvement of coupling techniques between Computational Fluid Dynamics (CFD) codes and thermal-hydraulic (TH) system codes, techniques that are expected to enhance the analysts’ and designers’ capabilities to simulate and predict the behavior of nuclear reactors (including those belonging to Generation IV) during normal and abnormal operating conditions. The work described in this report is a follow-up of that previously performed in the frame of PAR 2011. That initial work consisted in a review of the existing and accessible literature and technical documentation on the same subject (so as to identify the “state-of-the-art”) and in a preliminary development work aimed at a coupling interface between the CFD code ANSYS CFX and the system code RELAP5 (including a demonstrative application). Such preliminary development work brought to the definition of a coupling strategy and of the related needs in terms of software and information technology development, to the availability of a first rough but effective coupling tool, and to the identification of technical open issues and needs for further development and improvement work (such as convergence issues, V&V aspects, practical usability of the coupling tool etc.) Those outcomes constituted the starting point for the present activity, which had the objective of improving and further developing and testing the coupling tool
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
- …
