1,721,089 research outputs found
For better or for worse: Politics marries pop culture (TikTok and the 2022 Italian elections)
No full textThis contribution focuses on analysing political communication in Italy during the 2022 national elections, with particular attention to the TikTok platform, where prominent Italian political leaders have appeared. To this end, we used a combination of social analysis tools, including Fanpage Karma and Blogmeter Live Insight. The collected data were scrutinized using a multidisciplinary approach that combines Political Communication Theory and Media Analysis. The aim is to explore the role of pop culture in political communication and understand how this phenomenon influences political participation and users’ choices. Furthermore, the possible consequences of the growing popularity of pop political communication on political representation are examined, as well as whether this is a momentary or long-lasting phenomenon
Navigating the Virtual Realm of Hate: Analysis of Policies Combating Online Hate Speech in the Italian-European Context
No full textThe aim of this article is to conduct an in-depth analysis of the effectiveness of policies to counter online hate speech on social platforms. This analysis is approached through an interdisciplinary approach that combines sociological and legal perspectives to provide a non-partisan understanding of the phenomenon. The research consists of two phases: the first phase provides a general framework for the subject under examination, attempting to clearly delineate - on a definitional level - hate speech, emphasising its growing relevance in contemporary social dynamics; the second phase, focuses on an examination of the European value and regulatory framework, with particular reference to the civil law remedies that can be used in the Italian legal system to counteract the spread of online hate speech. This methodology makes it possible to identify the countervailing tools to which private individuals can resort in order to meet the requirements of justice and fairness. In this sense, the article aims to offer a broad overview of the subject matter, providing a contribution to the academic debate and to the understanding of the challenges related to the fight against online hate speech on social networks
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
Waste Energy Recovery and Valorization in Internal Combustion Engines for Transportation
Full text linkInternal Combustion Engines (ICE) are experiencing a transition era in which research and innovation are mainly pushed by environmental issues: emission reduction and fuel saving are indispensable requirements of the new technologies, otherwise the end of ICE is proposed in Europe. Modifications, in reality, are under discussion by 2026 but the environmental issues are anyway welcomed. In the transportation sector, today dominated by ICEs, it appears that the reduction in the propulsion power, hybridization at various degrees, and exhaust post-treatment improvements will guarantee technological solutions able to support the transition in the next couple of decades toward full electric propulsion. Waste Heat Recovery (WHR) is a very interesting opportunity since almost two-thirds of fuel energy is not converted into mechanically useful energy. Moreover, the integration with other thermal streams on board (cooling and lubricating mediums, EGR cooling) can add further value to the recovery opportunity as well as the concept of managing the engine thermal management which can produce a sensible contribution that is appreciated mainly during urban driving. A huge scientific effort is underway, and a great expectation is perceptible. More generally, the technological options that can achieve a reduction in overall fuel consumption and, thus, the improvement of global engine efficiency, are the most valuable when they can be introduced without massive changes to the engine layout. This happens in all the energy applications in which ICEs are involved since the recovery unit can be introduced in the exhaust line. The mechanical energy recovered can be easily transformed into electrical energy, so represents an interesting integration with the hybrid propulsion powertrains. In this paper, a review of the most important technologies referred to the WHR is presented, outlining advantages and drawbacks, and setting up the presently available technologies referred to the transportation sector
Combined Supercritical CO2 Brayton Cycle and Organic Rankine Cycle for Exhaust Heat Recovery
No full textIn order to reduce energy consumption and related CO2 emissions, waste heat recovery is considered a viable opportunity in several economic sectors, with a focus on industry and transportation. Among different proposed technologies, thermodynamic cycles using suitable organic working fluids seem to be promising options, and the possibility of combining two different cycles improves the final recovered energy. In this paper, a combination of Brayton and Rankine cycles is proposed: the upper cycle has supercritical carbon dioxide (sCO2) as its working fluid, while the bottomed Rankine section is realized by an organic fluid (organic Rankine cycle (ORC)). This combined unit is applied to recover the exhaust energy from the flue gases of an internal combustion engine (ICE) for the transportation sector. The sCO2 Brayton cycle is directly facing the exhaust gases, and it should dispose of a certain amount of energy at lower pressure, which can be further recovered by the ORC unit. A specific mathematical model has been developed, which uses experimental engine data to estimate a realistic final recoverable energy. The model is able to evaluate the performance of each recovery subsection, highlighting interactions and possible tradeoffs between them. Hence, the combined system can be optimized from a global point of view, identifying the most influential operating parameters and also considering a regeneration stage in the ORC unit
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
Oil thermal management during engine transients from a cold state
No full textThe paper presents an experimental activity aimed at assessing the influence of a faster warm-up of the lubricant oil in a F1C (3 L) turbodiesel engine used both for light and heavy duty applications. The engine is ran on a dynamometer test bench and transient homologation cycles have been implemented considering different initial oil conditions. Lubricant and cooling thermal dynamics have been evaluated and their mutual thermal interactions have been discussed. In particular, an initial hotter oil showed fuel consumption and CO2 emissions saving. Harmful substances (CO, HC, NOx, particulate matter) have been measured too, displaying significant reduction mainly due to the modified engine temperature dynamics
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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