1,721,318 research outputs found
Andrea Pozzo dalla Lombardia a Mondovì
No full textEsame dell'opera di Pozzo a Mondovì come sintesi della sua lettura critica dell'arte lombarda fra cinque e seicento
Wastewater management of wet scrubbers in waste-to-energy facilities: A life cycle analysis
Full text linkNowadays, increasing attention is focused on the indirect impacts of emission control technologies and the potential burden shifting. A clear example is the generation of wastewater when wet scrubbing systems are used for flue gas cleaning. The present study takes into consideration a typical wet scrubber for waste-to-energy plants and the available options for wastewater management: physicochemical treatment, evaporation or valorisation. A comparative assessment of the environmental footprint of the alternatives is performed by taking into account the burdens related to the supply of reactants, energy and the disposal of process residues (solid and liquid waste streams). It is thus shown that the recovery of a marketable product from the effluent produces a net environmental benefit, while the choice between wastewater discharge or evaporation represents only a shift of burden between the water and the soil compartments
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
Sustainability assessment of furnace versus in-duct sorbent injection to retrofit waste-To-energy dry flue gas treatment lines
Full text linkTo guarantee a safe compliance with the ambitious targets of acid gas (HCl, SO2) removal set by recent European regulations, existing waste-To-energy (WtE) plants equipped with single-stage acid gas treatment systems might take into consideration the installation of an additional treatment stage as retrofit. Multi-stage treatment systems can achieve higher acid gas removal efficiency and flexibility to cope with highly variable inlet pollutant concentrations, resulting from variability in waste composition. From a sustainability viewpoint, the choice of the most suited retrofitting option has to be driven not only by considerations on performance at the WtE plant but also by considerations on the indirect environmental burdens related to the material and energy consumption and waste generation of the selected options. The present study analyses the full environmental profile of two competitive dry retrofitting solutions (the lowtemperature injection of hydrated lime and the high-Temperature injection of calcined dolomite) by considering their life cycle impacts associated with the supply of reactants and the disposal of process residues. Modelling of the material balance of the alternatives as a function of pollutant load in the inlet flue gas allowed estimating the effect of flue gas composition and mode of operation of the two-stage system on the overall environmental impact. Both retrofitting options were found to reduce the life cycle impacts of the base case, but the use of hydrated lime showed the greatest potential. The generation of process residues constitutes a relevant fraction of the overall impacts. An alternative scenario for the management of process residues was evaluated to quantify the reduction of impact achievable with a commercially available valorisation route
Andrea Pozzo a Mondovì
No full textIl volume Andrea Pozzo a Mondovì, a cura di Heinrich W. Pfeiffer, si inserisce fra le
pubblicazioni relative alla celebrazione del terzo centenario della morte di Andrea Pozzo,
straordinario pittore e prospettico gesuita, noto soprattutto per la decorazione della chiesa di
Sant'Ignazio a Roma. Questo volume è interamente dedicato all'impresa dell'artista nella monregalese chiesa della
Missione (già San Francesco Saverio) e presenta molti meriti, come l'organicità e coerenza dei
contributi, dovuti allo stesso Pfeiffer, a Walter Canavesio, Silvia Carandini, Marinella Pigozzi e
Andrea Spiriti. Ai saggi
seguono i rilievi dell'interno della chiesa e una serie di approfondimenti sui restauri, che
forniscono interessanti notizie, oltre che sugli interventi e lo stato di conservazione, anche sulle
tecniche esecutive
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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