1,720,966 research outputs found
S.A.P.I.EN.T.E. Hybrid System: An Experimental Test Facility Focused on Energy Generation and Hybrid Storage for Self-Consumption Strategies
No full textThe European Renewable Energy Directive promotes the uptake of Renewable Energy Communities and Jointly Acting Renewable Self-Consumers for the local production and shared consumption of energy, as an alternative to the classic model based on centralized production, transmission, and distribution. In this work, carried out under the MASE - ENEA 2022-2024 program agreement on Electrical System Research, the authors illustrate the hybrid system called S.A.P.I.EN.T.E., a full scale experimental test facility, comprising different energy generation and storage sections, in continuous evolution, and the inherent experimentations that aimed to maximize the selfconsumption of locally produced energy in the context of energy communities. We demonstrate, through experimental activities, the advantages in terms of energy self-consumption and selfsufficiency that such a system architecture can achieve
Comparison of Smart Readiness Indicator and Energy Performance Certificate: Multi-Scenario Analysis for Improving the Energy Efficiency of Residential Buildings
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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
Scale-up of bulk-heterojunction polymer solar cells
No full textPolymer solar cells (PSCs) have recently reported a marked improvement in conversion efficiency, exceeding 10%, thus reducing the gap with more mature photovoltaic technologies. Now the transfer of such performances to the large scale has to be carried out by using industrially relevant techniques such as spray and slot die coating, and inkjet, gravure, flexographic and screen printing. This work is focused on the scale up of the PSCs by exploiting spray coating, a simple and low cost method already successfully applied to PSC layers. Firstly in literature a fully sprayed module was fabricated on glass substrate by an automated machine in air. Moreover, modules comprising a sprayed active layer were realized on flexible substrates. Both of them yielded ~1% of efficiency and supplied small power electronic devices. The aim to increase the efficiency of the modules addressed the activity towards two aspects. The first one concerned the investigation of new sprayable materials, i.e. low-temperature TiOX and PFN as interlayers and PBDTTT-C-T:PC71BM as active layer, all processed in safe solvents. The second one regarded the influence of the patterning methods, such as mechanical scribing and additive patterning through aerosol jet pre-printing, on the electrical parameters of the device. Finally, a lot of attention was focused on the stability issue. Encapsulation with commercial polymers was employed by heat sealing and this method revealed to be effective in the assembly of a fully solution-processed panel for greenhouse applications. Furthermore, the intrinsic stability of the device structure was analyzed; it was demonstrated that the electron transport layer and the solvent in which it is dissolved have a great influence on the device stability
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
A Comparative Evaluation of Sustainable Binders for Environmentally Friendly Carbon-Based Supercapacitors
Full text linkEnvironmentally friendly energy storage devices have been fabricated by using functional materials obtained from completely renewable resources. Gelatin, chitosan, casein, guar gum and carboxymethyl cellulose have been investigated as sustainable and low-cost binders within the electrode active material of water-processable symmetric carbon-based supercapacitors. Such binders are selected from natural-derived materials and industrial by-products to obtain economic and environmental benefits. The electrochemical properties of the devices based on the different binders are compared by using cyclic voltammetry, galvanostatic charge/discharge curves and impedance spectroscopy. The fabricated supercapacitors exhibit series resistance lower than a few ohms and values of the specific capacitance ranged between 30 F/g and 80 F/g. The most performant device can deliver ca. 3.6 Wh/kg of energy at a high power density of 3925 W/kg. Gelatin, casein and carboxymethyl cellulose-based devices have shown device stability up to 1000 cycles. Detailed analysis on the charge storage mechanisms (e.g., involving faradaic and non-faradaic processes) at the electrode/electrolyte interface reveals a pseudocapacitance behavior within the supercapacitors. A clear correlation between the electrochemical performances (e.g., cycle stability, capacitance retention, series resistance value, coulombic efficiency) ageing phenomena and charge storage mechanisms within the porous carbon-based electrode have been discussed
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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