Pupils\u2019 ideas exploration on metal electrical transport models in the informal context of an hands-on exhibit,

A wide literature considers the problem of learning relative to the electrical circuits starting from different perspectives. A lot of work has be done as concern learning difficulties on developing systemic reasoning on functioning of electric circuits, on different aspects: 1) the conceptual differentiations of charge, current, voltage, energy, 2) establishing phenomenological relations between electrostatics and electrodynamics, 3) linking macro and micro level of description of processes. Different strategies are implemented in teaching/learning proposal on this last point and to produce a systemic vision and functional reasoning. Simulations are developed to provide micro level representation both of simple circuit functioning and of electrical transport phenomena in solids, but an exploration is lacking on spontaneous pupils\u2019 ideas about microscopic models of electrical conduction. Critical details and the spontaneous angles of attach to the topic are relevant in activating learning, therefore in simple situations with electric circuits, individual interviews are submitted according to a semi-structured protocol to 10 (N=11) and 13 (N=35) year old pupils of 3 different schools in the context of an hands-on exhibit, to gain competences in the representation perspective of pupils in their first approach to the models of electrical conduction in metals

Reciprocal Function Series Coefficients with Integer Partitions

We obtain an explicit formula in terms of the partitions of the positive integer n to express the nth coefficient of the formal series expansion of the reciprocal of a given function. A brief survey shows that our arithmetic proof differs from others, some obtained already in the XIX century. Examples are given to establish explicit formulas for Bernoulli, Euler, and Fibonacci numbers

LA NUOVA AUTORITA’ PORTUALE DEL BASSO TIRRENO: UNA OPPORTUNITA’ PER L’AREA DELLO STRETTO

The article starts from the “National Strategic Plan of the Harbours and Logistics”, approved by the Italian Government in July 2015, setting out the development strategies of the Italian port system and providing, among the other things, the redesign of the governance of the Italian port system. The old existing 24 Port authorities are replaced by 15 Authorities of port- system, in which different ports are combined in order to create an efficient port system able to compete and succeed in the overall system of commercial traffic in the Mediterranean Sea. Within this framework, the creation of a new Authority is provided, which incorporates the former Calabrian Port System with the old Port Authority of Messina. In this way we are going to create a large port system, centred on the area of the Messina Strait, comprising 10 ports, including the transhipment port of Gioia Tauro, which represents the core of the entire port system, and the port of Messina, the most important passenger port in Italy and one of the most important as regards the cruise sector. The article analyses the development perspectives that this system can offer with regard to two important aspects: the realization of the project -already imagined in the late '60s- for an Integrated Metropolitan Area of the Strait, including the two metropolitan cities of Messina and Reggio Calabria; the transformation of the port of Gioia Tauro, from an exclusively transhipment port into an Intermodal Logistics Pole, which will be the central strategic hub of a large logistics platform of the Strait Area, which implementation should be a great opportunity for the development of the entire Mezzogiorno. DOI: http://dx.medra.org/10.19254/LaborEst.11.1

Un laboratorio di ricerca concettuale sul trasporto elettrico nei metalli. Risultati ed implicazioni di ricerca per la didattica

A wide literature regards learning difficulties relating to electrical circuits. Many researches focus on different aspects of student reasoning on circuits functioning: i) the conceptual differentiation of charge, current, voltage, energy; ii) link between electrostatics and electrodynamics, iii) connection between macroscopic (founded on voltage/current) and microscopic (in terms of particles and interactions) level of description of the processes. Regarding the point (iii) an exploration is missing of spontaneous ideas which play an important role in learning. So, this research has explored the reasoning and models of 10 (N = 11) and 13 (N = 35) years old pupils on microscopic processes that occur in conductor wires. The data discussion indicates that reflection on microscopic processes helps students to overcome local reasoning and to gain a vision of the circuit as a system of interacting elements (systemic reasoning).Una vasta letteratura considera le difficoltà di apprendimento relative ai circuiti elettrici. Numerose ricerche riguardano diversi aspetti del ragionamento degli studenti sul funzionamento dei circuiti: i) differenziazione concettuale di carica, corrente, tensione, energia; ii) collegamento tra elettrostatica e elettrodinamica, iii) collegamento tra livello macroscopico (basato sulle grandezze corrente/ tensione) e microscopico (in termini di particelle e interazioni) di descrizione deiprocessi. In relazione a (iii) manca un’esplorazione delle idee spontanee, che giocano un ruolo rilevante nell’apprendimento.Quindi la presente ricerca ha esplorato i ragionamenti e i modelli di bambini di 10 anni (N = 11) e ragazzi di 13 (N = 35) sui processi microscopici che avvengono in fili conduttori di corrente. La discussione dei dati indica che la riflessione sui processi microscopici aiuta gli studenti a superare il ragionamento locale a favore di una visione del circuito come un sistema di elementi interagenti (ragionamento sistemico)

LA CITTA' METROPOLITANA COME OPPORTUNITA' PER PROMUOVERE LO SVILUPPO INTEGRATO TRA AREE CENTRALI E AREE MARGINALI: IL CASO STUDIO DI REGGIO CALABRIA

This paper proposes a reflection about the possibility of initiating a virtuous development processes within the Metropolitan City of Reggio Calabria through an adequate enhancement of the inner areas. The choice to make Metropolitan cities coincides with the old province acquires sense and reason only if the fate of weakest and poorest areas integrates with the one of the strongest and richest areas. Through the analysis of the various tools that have regulated the planning processes of the Calabrian internal areas over the years, the hypothesis to be developed in the paper is that the “Reggio Calabria metropolitan strategic plan” should be characterized by a more flexible territorial planning capable of creating networked projects, outlining a long-term general framework and taking into account that with different objectives different perimeters may correspond. A “variable geometry” which, while taking into account the municipal or inter-municipal administrative limits, pursues an integrated method, able to ensure the coherence between sectorial policies and articulated according to the different territorial divisions

The IWB for the construction of formal thinking: proposals for prospective primary teachers concerning motion, electrical and magnetic phenomena

The Interactive Whiteboard is a multimedia tool that has a continuous increasing diffusion in schools, but, too often, it is used to a simple transposition of activities designed for other multimedia tools. The development of specific designed activities centered on the development of learning process as regards the methods of teaching and the contents of the specific disciplines is needed. In teaching/learning physics, IWB can become a tool for conceptual modeling. In this paper, examples of activities designed for primary school pupils are discussed in relation with motion, electrostatic, magnetism phenomena evidencing the role of simple tools of the IWB to stimulate the formalization and the collaborative discussion between pupils

Dati VIIRS-Nightfire per il monitoraggio del gas flaring in Amazzonia: il caso Yasun\ued

L\u2019estrazione di combustibili fossili \ue8 un\u2019attivit\ue0 che ha ormai raggiunto aree remote ad alta diversit\ue0 biologica e culturale, tra le quali desta gran preoccupazione l\u2019espansione della frontiera petrolifera in Amazzonia occidentale, specialmente nella Riserva della Biosfera Yasun\uec (YBR), uno dei luoghi pi\uf9 biodiversi del pianeta e casa ancestrale degli indigeni Waorani. In prossimit\ue0 di questa zona, gli impatti socio-ambientali diretti e indiretti delle varie fasi dell\u2019estrazione petrolifera sono ampiamente documentati. Tra queste attivit\ue0, la distribuzione spaziale e gli impatti ambientali del gas flaring non sono stati ancora investigati a fondo, anche a causa della mancanza di un sistema di monitoraggio e documentazione delle posizioni dei flare e dei volumi di gas bruciato. Negli ultimi anni si sta assistendo per\uf2 a un\u2019inversione di tendenza, grazie allo sviluppo di vari metodi di monitoraggio da remoto, attraverso l\u2019analisi multispettrale da satellite. Lo scopo di questo studio \ue8 mappare l\u2019attivit\ue0 di gas flaring nell\u2019area dello YBR, analizzando diacronicamente e valutando gli impatti potenziali sia sulla biodiversit\ue0 che sulle comunit\ue0 locali. I dati giornalieri prodotti dalla NOAA da gennaio 2017 a marzo 2018, basate sull\u2019elaborazione di immagini dal sensore \u201cVisible Infrared Imaging Radiometric Suite\u201d del satellite Suomi-SNPP per il monitoraggio delle attivit\ue0 di gas flaring, sono stati analizzati e geoprocessati con dati sulle aree protette e comunit\ue0 indigene. Per il corretto posizionamento dei flare, quando possibile, \ue8 stato fatto riferimento ai dataset annuali della NOAA, per i nuovi flare \ue8 stato usato il centroide delle rilevazioni. I risultati preliminari mostrano la presenza di un nuovo sito di flare nel campo petrolifero Tiputini vicino all\u2019 \u201cArea Nucleo\u201d della YBR; tre flare sono stati rilevati nella zona buffer e 19 nella zona di transizione della YBR. spaziale ha inoltre identificato 6 comunit\ue0 indigene in un raggio di 6 Km dai flare. Questo studio rivela l\u2019enorme potenziale degli open data come Nightfire della NOAA per il monitoraggio di aree remote ad elevata importanza per la conservazione della biodiversit\ue0 e dei territori indigeni