1,721,293 research outputs found
Donafenib in Chinese patients with advanced hepatocellular carcinoma (HCC): Really a new standard of care, or should we change paradigm for drug development in HCC?
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Urea-based cream to prevent sorafenib-induced hand-and-foot skin reaction: Which evidence?
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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
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
Biogas to advanced biofuels: Techno-economic analysis of one-step dimethyl ether synthesis
No full textBio-dimethyl ether (bio-DME) is a promising advanced biofuel for the disposal of conventional diesel fuel, which is one of the most relevant sources of particulate matter and nitrogen oxides in urban centres and is completely banned from some European cities. DME is produced in two ways: dehydration of methanol produced from syngas (indirect or two-step process) and direct synthesis from syngas (direct or one-step process). This work aims at studying, optimizing and economically and environmentally assessing a novel conceptual design to convert biogas into bio-DME. Contrarily to traditional DME processes, the synthesis from biogas strongly benefits from milder conditions due to the smaller plant size, rural context, and biological feedstock fluctuations, motivating an ex-novo techno-economic feasibility study and sensitivity analysis performed in Aspen HYSYS V11 suite. The proposed process layout allows converting 1045 kg/h of silomais-based biogas (67%v/v CH4 content) into 516 kg/h of bio-DME at ASTM D7901-14 standard specification for fuel purposes. Sensitivity analysis identifies reactor temperatures as important process variables and defines three key performance indicators as: (i) global yield of the process; (ii) DME versus methanol selectivity; (iii) and the thermal load for the downstream section. The last one is computed as the sum of reboiler and condenser duties normalized with respect to the DME massive flowrate, and the study provides 1.05 kWh/kgDME as downstream section global specific duty. The process provides an innovative way to face the EU RED II challenge due to a 49.4 wt.% bio-DME yield and also thanks to a competitive 9.5 yr of payback period
Common currency, common identity? The impact of the Euro introduction on European identity
Full text linkDoes European state building go hand in hand with European nation building? This article engages with the scholarly debate on the dynamic relationship between the construction of supranational political institutions that exert key functions of sovereignty and collective identities by investigating the extent to which the adoption of the Euro as a currency is associated with a decrease in the share of Europeans who identify exclusively with their nation and not with the European Union. In detail, by using a dynamic panel-data model on 26 European Union countries in the post-Maastricht period (1996–2017), our results show that the Euro has fostered European identity, leading to a small but significant decrease (-3%) in the share of Europeans with exclusive national identity
ELECTROCHEMICAL RECYCLING OF RED GYPSUM WASTE: THE ELEDGE PROCESS
No full textRed gypsum is an industrial waste generated by the titanium dioxide industry. Currently, it is mainly used for environmental restoration, but this is not ideal due to problems of geographical availability of suitable sites and environmental issues. Different valorization routes have been proposed, including the utilization of red gypsum in the cement industry or its chemical recycling through thermal processes. These routes either lack the production capacity for an efficient disposal of red gypsum, or propose processes that need severe operating conditions and that generate a significant amount of CO2 emissions. This paper proposes a novel process for electrochemical recycling of red gypsum based on four fundamental steps: metathesis, electrodialysis, electrolysis, and carbonatation. Preliminary estimates on a process design basis are obtained and analyzed from a phenomenological point of view, leading to the development of mass and energy balances for the process. The advantage of such system is that an industrial plant capable of treating 80000 t/y of CaSO4 on an anhydrous basis leads to the production of 55234 t/y of concentrated H2SO4 and 52571 t/y of synthetic CaCO3, coupled with the mineralization of 23131 t/y of CO2. The process is completely electrified and has a power consumption of 8.5 MW that can be provided entirely from renewables-based power plants, leading to net-negative CO2 emissions. Tuscany region in Italy is taken as a practical example, where the TiO2 production industry could benefit from the ELEDGE (ELEttroDialisi di GEssi) process and couple it with a geothermal-based power plant
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