670 research outputs found
Active-RFID system operating in heavy environmental conditions to aid the production cycle of bentonite-coal dust mixtures for foundries
No full textThis paper deals with an industrial application in which active RFID have been used to tag the operating environments in order to provide aid to a preexisting production process. A system based on active RFID and aiming to assist the production cycle of a factory producing bentonite-coal dust mixtures and lustrous carbon formers for foundries is presented and discussed. The system works in a very heavy environment and uses RFID tags as beacons to locate the various area of the factory. An algorithm to discriminate among different tags is developed and some results are presented. The plant is in production since one year and is showing very satisfactory performances
Using Modelica for advanced Multi-Body modelling in 3D graphical robotic simulators
No full textThis paper describes a framework to extend the 3D robotic simulation environment Gazebo, and similar ones, with enhanced, tailor-made, multi-body dynamics specified in the Modelica language. The body-to-body interaction models are written in Modelica, but they use the sophisticated collision detection capabilities of the Gazebo engine. This contribution is a first step toward the simulation of complex robotics systems integrating detailed physics modelling and realistic sensors such as lidar and cameras. A proof-of-concept implementation is described in the paper integrating Gazebo collider and the Modelica MultiBody library, and the results obtained when simulating the interaction of an elastic sphere with a rigid plane are shown
Steady-state initialization of object-oriented thermo-fluid models by homotopy methods
No full textThe steady-state initialization of large object-oriented
thermo-hydraulic networks is a difficult problem, because of the sensitivity of the convergence to the initial guesses of the iteration variables. This paper proposes an approach to this problem based on homotopy transformation, detailing specific criteria for model simplifications in this physical domain. The approach is successfully demonstrated on large power plant test cases, having several hundreds of iteration variables
Gestione delle strisciate della camera ADS40 nella stazione digitale MENCISOFTWARE ZMAP
No full textGestione delle strisciate della camera ADS40 nella stazione digitale MENCISOFTWARE ZMA
Advancement in multi-body physics modeling for 3D graphical robot simulators
No full textIn this paper we present an interface to develop a communication between two different simulators: Gazebo, aiming at scene realism, and OpenModelica, focused on accurate dynamic simulation. This communication allows us to create a cooperative simulation loop, having a single shared simulated environment, and exploiting the best characteristics of each simulation
Recensione di F. DE LUCA, Il Capitolo Cattedrale di Lecce e il suo Archivio, Lecce, Milella, 2005
No full textExploring and FTIR-ing yeast biodiversity towards the development of superior strains for lignocellulosic ethanol
No full textRobust yeast strains with high inhibitors tolerance remain a critical requirement for the production of lignocellulosic bioethanol. These stress factors are known to severely hinder yeast growth and fermentation performance (Jönsson et al., 2013). This study aims at the design of industrial yeast suitable for the lignocellulose-to-bioethanol route. Grape marc was selected as extreme environment to search for innately tolerant yeast because of its limited nutrients, exposure to solar radiation, weak acid and ethanol content (Favaro et al., 2013 and 2014). One hundred and twenty Saccharomyces cerevisiae strains were recently described to have inhibitors, temperature and osmotic tolerance greater than those exhibited by industrial strains and showed remarkable potential for bioethanol production.
With the aim of further investigating their industrial fitness, a Fourier Transform InfraRed Spectroscopy (FTIR)-based bioassay was employed to explore the yeast metabolomic and viability responses to inhibitors. Three different strains of S. cerevisiae (Fm17, Fm84 and DSM70049) were chosen as representative for the top, medium and low inhibitors tolerance. The yeast were exposed to acetic acid, formic acid, furfural and 5-hydroxymethyl-2-furaldehyde (HMF) and analysed by a FTIR-based assay to detect the extent of the metabolomic stress, the type of response and the induced mortality. To deeper investigate the effect of the co-presence of inhibitors on yeast metabolism, FTIR analysis was also conducted on yeast cells challenged with mixtures composed by increasing dosages of each single inhibitory compound
Il dialogo pseudo-platonico Amanti: la polemica contro Isocrate e l’Accademia sotto il magistero di Platone
No full textIn this paper, the author analyses the dialogue Lovers or Rivals. Some scholars argue in favour of Plato’s authorship, while others agree on its inauthenticity. The thesis of its inauthenticity will be defended without reappraising and developing the most prevalent hypothesis, namely that the dialogue was composed in the third century BCE as a pamphlet against the Peripatetic school. In fact, the author advances the hypothesis that the Lovers were written by a disciple of Plato in the fourth century BCE, and that the dialogue clearly attacks Isocrates and, in particular, his conception of philosophy described for example in his Antidosis. The author will argue that the dialogue possesses a protreptic intent and perhaps addresses some of those issues that were most considered by Plato himself: finding a proper definition of philosophy and encouraging philosophers to engage in politics
Le colpe della cultura pagana: riflessioni sull'Epistola 69b di Giuliano
No full textThe article is a reflection starting from the epistle 89b of the emperor Julian, which is presented as an illuminating document for the reconstruction of the values of the Hellenic civilisation, based on a precise paideutic-religious programme, which takes the form of a kind of canon of praiseworthy and/or inadvisable author
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