1,720,959 research outputs found
Implementation of impact mitigation measures for maritime transport: an analysis of alternative waste management practices, air emissions monitoring and GHG reduction
No full textThe problem of waste management and waste generation in the shipbuilding sector is crucial in the context of sustainability, in which context the concept of a circular economy system for both re-use and recycling of waste should also be included. For these considerations, the proposed study examines a combined system for optimising ship waste management and evaluates its possible use for energy purposes. In addition, this work aims to develop indicators to monitor and assess the instantaneous environmental impact in the air from different types of ships. With regard to the first point, a number of systems were analysed in relation to their potential to reduce greenhouse gas emissions, regardless of the routes and ports of destination. As a re- sult of this analysis, the case studies of particular interest were identified: the thermochemical treatment of waste oils and sludges to obtain fuel oils, the installation of a waste-to-energy plant and subsequent energy recov- ery on board, a potential innovative pattern of recycling food waste from cruise ships for use as feed in aquaculture and potential green practices with particular attention to paper input and output flows in a waste mini- mization perspective. UNFCCC (United Nations Framework Convention on Climate Change) methodologies were applied to two of these case stud- ies to calculate the reduction in greenhouse gas emissions resulting from their implementation. The results obtained are presented with the aim of supporting sustainable on-board waste management strategies in a carbon circular economy perspective. With regard to the second point, the main objective was to make an objective assessment of the ship’s environmental impact in real time to allow for possible adjustments and improve energy efficiency. The definition of these new indicators can be used as a decision support system for shipboard personnel. Environmental performance indi- cators are developed following the evaluation of data collected on board by specific instrumentation, marine exhaust cleaning systems, existing legis- lation. Different ship types, characterised by different propulsion system configurations, are considered using real experimental data provided by
CETENA, a Fincantieri Group company. The indicators allow to compare the performance of the ship and the efficiency of the exhaust cleaning sys- tems under different operating conditions. They can be used as new tools, added to existing instrumentation that can be implemented to minimize the ship’s environmental footprint
Analysis, comparisons and potential of a Hybrid Solar Power System through a life cycle approach
No full textThe sun is the most environmentally sound resource to produce clean and renewable energy, even though environmental score for solar technologies are representative only for the most common devices such as photovoltaic panels. Hybrid solar plants that combine solar power with another source of energies have never being compared with traditional solar technologies such as photovoltaic panels. The aim of this study is to analyze and compare the environmental score of a Solar Hybrid Combined Cycle with a traditional photovoltaic system and find out the potential and possible future development of the new technology. Thus the technologies analyzed are: a 100 kWp photovoltaic plant (PV) and a 100 kW hybrid solar-gas turbine systems (HSGT) that use as fuel a mix of solar radiation and natural gas. Using a life cycle approach, the potential environmental impact of the two solar power technologies is evaluated. The energy produced and expressed in kWh has been choosing as a functional unit. To better understand the potential of the new technology the heat produced by the plant has been accounted by substitution with a gas boiler, highlighting the potential of the HSGT technology. Despite that fact PV results as the best environmental sound technology between the two system under study while a Solar Hybrid Combined Cycle could become a better choice in a not so far future
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
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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