1,720,995 research outputs found
Da Voce a Voce: spazio etico o spazio politico da Tiresia di Giuliano Mesa a Terraemotus di Fabio Orecchini
Full text linkLa rimozione storica è il nodo in cui s’incontrano il poemetto Tiresia di Giuliano Mesa e l’installazione Terraemotus di Fabio Orecchini. Il tragico rimosso del XX secolo, ciò che si preferisce non vedere, è oggetto di visone del cieco ed indovino Tiresia: le fosse comuni, le bombe atomiche, il commercio di organi infantili, lo sfruttamento minorile, le baraccopoli. In una spirale ritmico-visionaria il rigore linguistico è misura del rigore etico.Historical removal is the crux in which the poem Tiresia by Giuliano Mesa and Terraemotus installation by Fabio Orecchini meet each other. The tragic of the Twentieth century that has been removed, what we prefer not to see, is the blind prophet Tiresias’ object of vision: mass graves, atomic bombs, trade in infant organs, exploitation of children, slums. In a rhythmic-visionary spiral, linguistic rigor is measure of ethical rigor
Hydrogen recovery from On Site Electro Chlorination system.
No full textThe production of hypochlorite can occur through the process of electrolysis of a saline solution
with a hydrogen production that is usually discarded.
The main objective of the study was to assess, in practice, whether it is possible to recover the
hydrogen produced during the electrolysis of a saline solution in order to use one or more fuel
cells. The energy produced by such cells can be used to reduce the energy consumption of the
production of sodium hypochlorite or other purposes.
We first made an evaluation of the producibility of hydrogen from the electrolysis process for a
OSEC (On Site Electro Chlorination) system, called MK4, working in batch mode.
We then verified experimentally the ability to collect hydrogen and to use it in one or more fuel
cells.
The methodology involved the following steps:
• Change of the original system to collect the gas,
• Whatever purification of chlorine gas,
• Measure of the flow of gas produced,
• Analysis of the purity of the gas produced by gas chromatograph.
Once purified from chlorine, the gas has been placed in different configurations of fuel cells
stacks.
The power obtained from the fuel cell was assumed to be about 24 W, so the efficiency is about
25 %, that is not very high for a fuel cell. It was evaluated that energy recovery is around 8-10%,
considering the input power of the OSEC and the output power from the fuel cell.
But the gas produced contains about 85% hydrogen and 15% oxygen. The presence of oxygen
could reduce the proportion of hydrogen involved in the electrochemical reaction, lowering the
efficiency of the fuel cell. If the presence of oxygen in the anode gas is limited, we may obtain
an efficiency of the fuel cell of about 40%. So the energy recovery would be 14%
Smart university: the sustainable vector of knowledge
No full textThe term smart has been increasingly used to refer to a process of rethinking and modernization in different areas and contexts, covering the use of innovative technology solutions,sharing networks and data, and access to goods and services.That’s all feasible thanks to multi-stakeholder participation at different levels, and access through the use of ICT. In the definitionadopted in January 2014, the Committee on Industry, Researchand Energy (ITRE) Committee of the European Parliament, has defined a Smart City as “a city seeking to address public issues via ICT based solutions on the basis of a multi-stakeholder, municipallybased partnership”. That definition is lacking of a crucial concept. It is scientifically incorrect to define “smart” any human expressionin perspective without referring to sustainability. Smart means,therefore, sustainable. This work highlights the close link betweensmart university and sustainability. In a parallel with smart grids, smart mobility, and Smart Cities, university, through the smartification of its essential components can be much more sustainable when evolvedinto a distance learning, networked and connected smart universitycompared to “traditional” fully physical university. Smart universityshares physical elements, needs and moves less mass, being in one word, more efficient. As well as from the energy point of view, a sustainable future can be defined as the “Era of energy vectors” in which “an energy vector allows transfer, in space and time, a given quantity of energy, hence making it available for use distantly in time and space from the point of availability of the original source”, from a knowledge point of view, smart university allows to transfer, in space and time, a given knowledge, hence making it available for use distantly in time and space from the point of availability of the originalsource. The aim of developing a sustainable society is a very strongdriver towards the smartification of education and research, and the Smart university considered as a sustainable vector of knowledge is the key factor for its realizatio
Uso della modellistica per il monitoraggio e la sostenibilità degli agroecosistemi
No full textFabio Orecchini, Gino Bella,Salvatore Pietro Cicconard
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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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