86,865 research outputs found
Reply to comments on 'EPR study of He-implanted Si' by P. Pivac, B. Rakvin, R. Tonini, F. Corni, G. Ottaizani, Published in Mater. Sci. Eng. B73 (2000) 60-63 - Written by M. Kakazey, M. Vlasova, and J.G. Gonzalez-Rodriguez - Reply to discussion
No full textReply to comments on 'EPR study of He-implanted Si' by P. Pivac, B. Rakvin, R. Tonini, F. Corni, G. Ottaizani, Published in Mater. Sci. Eng. B73 (2000) 60-63 - Written by M. Kakazey, M. Vlasova, and J.G. Gonzalez-Rodriguez - Reply to discussio
GoIP: An Atomistic Force-Field to Describe the Interaction of Proteins With Au(111) Surfaces in Water
No full textA classical atomistic force field to describe the interaction of proteins with gold (111) surfaces in explicit water has been devised. The force field is specifically designed to be easily usable in most common bio-oriented molecular dynamics codes, such as GROMACS and NAMD. Its parametrization is based on quantum mechanical (density functional theory [DFT] and second order Moller-Plesset perturbation theory [MP2]) calculations and experimental data oil the adsorption of small molecules on gold. In particular, a systematic DFT survey of the interaction between Au(111) and the natural amino acid side chains has been performed to single out chemisorption effects. Van der Waals parameters have been instead fitted to experimental desorption energy data of linear alkanes and were also studied via MP2 calculations. Finally, gold polarization (image charge effects) is taken into account by a recently proposed procedure (Iori, F.; Corni, S. J Comp Chem 2008, 29 1656). Preliminary validation results of GoIP on an independent test set of small molecules show the good performances of the force field. (C) Wiley Periodicals, Inc. J Comput Chem 30: 1465-1476, 200
Conceptual metaphor in teaching/learning electric circuits for student teachers of primary school and kindergarten
No full textIntegration between cognitive linguistic aspects and physics has been performed in the Physics Education course of the Master's Degree for prospective primary teachers at the University of Udine in Italy. Conceptual metaphors have been introduced to the students, who were then invited to apply the ideas to the electric circuits. In this contribution we present some relevant results of this activity pointing out how students have worked with metaphors, gaining better conceptual understanding on the disciplinary topic
Including image charge effects in the molecular dynamics simulations of molecules on metal surfaces
No full textDynamic modelling with “MLE-energy dynamic” for primary school
No full textDuring the recent years simulation and modelling are growing instances in science education. In primary school, however, the main use of software is the simulation, due to the lack of modelling software tools specially designed to fit/accomplish the needs of primary education. In particular primary school teachers need to use simulation in a framework that is both consistent and simple enough to be understandable by children [2]. One of the possible area to approach modelling is about the construction of the concept of energy, in particular for what concerns the relations among substance, potential, power [3]. Following the previous initial research results with this approach [2], and with the static version of the software MLE Energy [1], we suggest the design and the experimentation of a dynamic modelling software— MLE dynamic-capable to represent dynamically the relations occurring when two substance-like quantities exchange energy, modifying their potential. By means of this software the user can graphically choose the dependent and independent variables and leave the other parameters fixed. The software has been initially evaluated, during a course of science education with a group of primary school teachers-tobe, to test the ability of the software to improve teachers’ way of thinking in terms of substance-like quantities and their effects (graphical representation of the extensive, intensive variables and their mutual relations); moreover, the software has been tested with a group of primary school teachers, asking their opinion about the software didactical relevance in the class work
Force Dynamic Gestalt, image schema e concetti scientifici
No full textQuesto capitolo risponde alla domanda: quali sono i punti di partenza, i fondamenti, i concetti primari che stanno all’origine del pensiero scientifico e che, al contempo, sono così elementari da essere alla portata dei bambini
Area formula for regular submanifolds of low codimension in Heisenberg groups
No full textWe establish an area formula for the spherical measure of intrinsically regular submanifolds of low codimension in Heisenberg groups. The spherical measure is constructed by an arbitrary homogeneous distance. Among the arguments of the proof, we point out the differentiability properties of intrinsic graphs and a chain rule for intrinsically differentiable functions
From Metaphor to Narrative in Macroscopic Physical Science
No full textIn this contribution, we shall argue that forces of nature are understood not only meta-phorically but also, and maybe even to a larger extent, narratively. We can demonstrate that, in hindsight, metaphoric structures of our concept of force of nature exist, and we can sketch their forms, but it is highly unlikely that our understanding of forces is creat-ed in a bottom-up metaphoric process. It seems much more likely that the origin of the notion of force(s) of nature stems from direct experience that is transformed in stories we tell about water and wind, fire and ice, and all the other forces that appear in human experience of nature
Supercomet: uno strumento multimediale per l'insegnamento della superconduttività
No full textSUPERCOMET è un progetto del programma Leonardo da Vinci fase II dell’Unione Europea. Ha avuto inizio, nella sua prima versione, nel dicembre 2001 e si è concluso nel dicembre 2004. Immediatamente dopo è stato varato il progetto SUPERCOMET 2 che è tuttora in corso e che finirà nel 2006. SUPERCOMET dà il nome a quello che sarà il prodotto finale del progetto: uno strumento multimediale per l’insegnamento della superconduttività rivolto in particolare agli studenti della suola secondaria superiore. Gli obiettivi del progetto, oltre a quello di produrre lo strumento multimediale, sono quelli di creare una comunità internazionale a livello europeo con competenze nel rinnovamento dell’insegnamento della fisica e di aprire vie di comunicazione e stabilire contatti stabili fra le organizzazioni di insegnanti di fisica, ricercatori in didattica della fisica e autorità competenti nella stesura dei curricoli. In questo lavoro verranno descritte le caratteristiche dello strumento multimediale nel suo stato attuale e indicati gli sviluppi futuri
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