1,720,961 research outputs found
LCA application to case studies and the use of dynamic models to improve food production modelling
Full text linkLCA application to case studies and the use of dynamic models to improve food production modelling ..
Development of a new high energy efficiency building product through life cycle management of the waste glass recycling chain
No full textParticipatory approach, acceptability and transparency of waste management LCAs: case studies of Torino and Cuneo
No full textThe paper summarises the main results obtained from two extensive applications of Life Cycle Assessment (LCA) to the integrated municipal solid waste management systems of Torino and Cuneo Districts in northern Italy. Scenarios with substantial differences in terms of amount of waste, percentage of separate collection and options for the disposal of residual waste are used to discuss the credibility and acceptability of the LCA results, which are adversely affected by the large influence of methodological assumptions and the local socio-economic constraints. The use of site-specific data on full scale waste treatment facilities and the adoption of a participatory approach for the definition of the most sensible LCA assumptions are used to assist local public administrators and stakeholders showing them that LCA can be operational to waste management at local scal
Eco-efficient waste glass recycling: integrated waste management and green product development through LCA
No full textAs part of the EU Life + NOVEDI project, a new eco-efficient recycling route has been implemented to maximise resources and energy recovery from post-consumer waste glass, through integrated waste management and industrial production. Life cycle assessment (LCA) has been used to identify engineering solutions to sustainability during the development of green building products. The new process and the related LCA are framed within a meaningful case of industrial symbiosis, where multiple waste streams are utilised in a multi-output industrial process. The input is a mix of rejected waste glass from conven- tional container glass recycling and waste special glass such as monitor glass, bulbs and glass fibres. The green building product is a recycled foam glass (RFG) to be used in high efficiency thermally insulating and lightweight concrete. The environmental gains have been contrasted against induced impacts and improvements have been proposed. Recovered co-products, such as glass fragments/powders, plastics and metals, correspond to environmental gains that are higher than those related to landfill avoidance, whereas the latter is cancelled due to increased transportation distances. In accordance to an eco-effi- ciency principle, it has been highlighted that recourse to highly energy intensive recycling should be lim- ited to waste that cannot be closed-loop recycle
Bio-based cellulose-filled vitrimers for 3D printing via liquid deposition modeling: Rheological tuning and environmental assessment
Full text linkTo address the need for sustainable materials in 3D printing applications, a bio-based vitrimer was developed using an epoxy resin derived from cardanol and cystamine as a cross-linker. Cystamine was chosen due to its dynamic disulfide bonds, bio-based nature and highly reactive aliphatic amine groups, enabling rapid network formation under mild thermal conditions. Microfibrillated cellulose (MFC) and ultrafine cellulose (UFC) were used as bio-based fillers and rheology modifiers to formulate printable pastes. The curing process was thoroughly investigated by DSC and FTIR-ATR, confirming efficient cross-linking under the selected conditions. Thermal and structural properties of the vitrimers were characterized by gel content, swelling, and heat resistance analyses. The printability of the pastes via Liquid Deposition Modeling was evaluated through rheological analysis, and a concentration of 13 wt% MFC and 13 wt% UFC was identified as the optimal compromise between shear-flow behavior and post-print structural integrity. Simple and more complex geometries were printed and then cured at 30–80 °C, ensuring high shape fidelity (87.0 %). The vitrimer behavior was confirmed by stress-relaxation experiments, showing an overall activation energy in the range of 63–65 kJ mol−1, and by successful mechanical recyclability. Finally, a preliminary Life Cycle Assessment underscored the potential of these materials for sustainable additive manufacturing
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
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