1,721,240 research outputs found
"Oportunidades y riesgos en la politicas y en los programas para Valparaiso, ciudad patrimonial y ciudad normal"
No full textCeccarelli P., De Menna E. (a cura di
Use of carbon nanostructures in hybrid photovoltaic devices
No full textThis chapter provides an overview of the advantages resulting from the inclusion of carbon nanostructures (CNSs) within the different components of last-generation hybrid photovoltaic (HPV) devices. Among hybrid devices, here only dyesensitized solar cells (DSSCs) and perovskite solar cells (PSCs) are considered. In particular, the latter have been attracting the attention of researchers for less than a decade, but are extremely promising. In this context, CNSs are employed as auxiliary materials, to boost performances and stabilities, as well as to make production costs even lower. This chapter is indeed focused on carbon nanotubes, graphenebased materials and fullerenes. After briefly recalling the configuration of DSSCs and PSCs and the structures and properties of CNSs, strategies of CNS integration within different components of devices are described. Special attention is drawn to chemical functionalization of CNSs, enabling easier processing and addressing selective interactions with other species. Then, the discussion directs towards the roles played by the different CNS species in HPV cells, highlighting in particular strategies for improving device stability. Indeed the topic recalls nowadays a large attention from the scientific community. Finally, perspectives are indicated for further improvements of performances through the inclusion of CNSs in HPV devices
Sarcophilus harrisii (Dasyuromorphia: Dasyuridae)
No full textRose, Robert K., Pemberton, David A., Mooney, Nick J., Jones, Menna E. (2017): Sarcophilus harrisii (Dasyuromorphia: Dasyuridae). Mammalian Species 49 (942): 1-17, DOI: 10.1093/mspecies/sex001, URL: http://zoobank.org/10c0593b-41ac-49cd-90ad-ec53d38a9fe
Fliberto Menna e le linee analitiche del contemporaneo
No full textFiliberto Menna e le linee analitiche del contemporaneo
Il libro di Filiberto Menna, La linea analitica dell’arte moderna, ha avuto sicuramente il merito di permettere, a più di una generazione di studiosi, di comprendere la rottura epistemologica creata dall’arte moderna una volta abbandonata la concezione naturalistica e la corrispondenza tra linguaggio e realtà. L’attualità della lettura teorica che il critico salernitano fornisce emerge anche negli interventi, più brevi e divulgativi, editi su quotidiani e riviste in cui affiorano la sensibilità con cui coglie le trasformazioni dell’arte, la sua empatia con gli artisti e, non ultimo, la consapevolezza del ruolo sempre più importante che stavano assumendo gli eventi espositivi nella trasformazione del concetto stesso di arte
Carbon nanotube nanofluid for the efficiency improvement in a CHP system: simulation and experimental investigation
No full textDue to the importance of combined heat and power (CHP) systems in ensuring the energy efficiency of thermal units as well as the ability of nanofluids to enhance the thermal efficiency of thermal equipment, a new nanofluid was synthesized and compared with some other thermal fluids. Multi-walled carbon nanotubes (CNTs) were employed as a multifunctional nanoplatform in a base fluid. Additionally, some physical and chemical surface modifications were conducted in order to improve not only dispersion but also stability of this nanofluid. The acid treatment and polymer wrapping (PEGylation) of CNTs were applied as chemical and physical modifications, respectively. These techniques assisted us to prepare a more stable thermal nanofluid in a CHP system. Furthermore, higher heat removal was achieved, compared to previously tested nanofluids. Because of the extensive and various methods in surface modification of the CNT together with the effect of this modification on the thermal behavior of nanofluid, it seems that the PEGylated and oxidized CNT nanofluid can play an important role in improving CHP heat removal and ensure higher heat recovery. Furthermore, the possibility of more power generation was investigated with the aid of Aspen HYSYS simulation software. Simulation results showed that there is a potential to produce 52.75 kW more power with implementation of an Organic Rankine Cycle (ORC) within the current system. The ORC’s thermodynamic efficiency was 10.29%
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
La casamatta per i cannoni trasformata in osservatorio
No full textLe casematte dei cannoni sono diventate, attraverso l'installazione di cannocchiali, punti di osservazione del paesaggio
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
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