1,721,102 research outputs found
Experimenting growing media through local bio-resources valorisation: A design-oriented approach for living walls
Full text linkIn the context of densely populated urban areas, vertical greenery systems are gaining momentum for their role in reintroducing nature and enhancing buildings sustainability. Despite this trend, the absence of a standardised methodology for designing sustainable vertical greenery systems and guidelines for selecting appropriate growing media for this technology are two crucial gaps in academic research. This study addresses this by testing six alternative growing media derived from local bio-resources (dried M. spicatum, hazelnut shells, coffee grounds, hemp stalks, grinded cork, and raw sheep wool) and comparing them with a standard growing medium. The experiment was conducted over 120 days, monitoring the health and growth of three plant species - C. comosum, S. wallisii, and M. spicata. Innovative tools, such as a multi-criteria matrix and the Mean Leaf Growth Index, were introduced to assess sustainability and plant development. The findings highlight promising outcomes for hazelnut shells-based, hemp stalks-based, and grinded cork-based growing media, showcasing their lightweight and stable attributes compared to standard growing medium and assuring good plants health and growth. In contrast, raw sheep wool-based, M. spicatum-based, and coffee grounds-based growing media present challenges in plant health and growth, despite interesting attributes concerning lightweight and low water demand. This research contributes to shaping a design-by-components strategy for more sustainable vertical greenery systems, emphasizing the crucial role of circular bio-resources in nature-based technological innovations
The mycological social network: a way forward for conservation of fungal biodiversity
Full text linkSummary
Because knowledge of fungal diversity is very incomplete, it is possible that anthropogenic impacts are driving species to extinction before they have been discovered. Fungal inventories are still incomplete and do not reflect the complete diversity of this large taxon. Whilst molecular advancements are leading to an increased rate of species discovery, there is still much to be done to understand the diversity of fungi, identify rare species and establish conservation goals. Citizen science via social media could play an increasingly important role in mycological research, and its continued development should be supported and encouraged. The involvement of non-professionals in data collection helps increase public awareness, as well as extending the scope and efficiency of fungal surveys. Future academic mycological research could benefit from social media interaction and engagement with the amateur mycological community, which may accelerate the achievement of more effective conservation goals.</jats:p
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
Vertical Greening Systems: A Critical Comparison of Do-It-Yourself Designs
Full text linkDue to the increasing shortage of space in urban areas, vertical greening systems (VGSs) are becoming increasingly popular as a means to provide increased urban greening using building facades. VGSs are usually installed and managed by experts due to technical complexity, however the role of local communities is becoming increasingly important through Do-It-Yourself (DIY) practices. This study aims to explore low-cost VGSs and provide design suggestions and maintenance indications to encourage the expanded use of in situ small-scale VGSs. Firstly, an exploratory review of VGS designs proposed in the scientific literature, and by commercial and community-based solutions was conducted taking DIY potential into account to define eight basic design models categorized through six structural criteria. Then, seven community garden groups were interviewed to inform a critical comparison of the eight design models. Data collected was synthesized to develop a star rating system, thus providing a quick comparative tool. The star rating system shows the performance of five relevant DIY design parameters for each VGS model. The current research may assist in the accessibility of green technologies and facilitate community-scale implementation of DIY vertical greening
Alternative Growing Medium for Indoor Living Walls to Foster the Removal Efficiency of Volatile Organic Compounds
Full text linkIncreasing urbanization trends led to growing concerns regarding human health risks linked to long-time exposure to poor indoor air quality.Volatile
Organic Compounds (VOCs), e.g., formaldehyde and benzene, are the most significant pollutants in indoor environments due to the high number of sources contributing to increase their concentration. Vertical Greening Systems (VGSs) have been proven as space-efficient nature-based solutions (NBS) using the ability of ornamental plants in removingVOCs.Growing media and rhizosphere community often play a pivotal role in removing indoor VOCs, especially in active biofilters. Although horticultural substrates are often overlooked in VGSs’ applications, an increasing number of studies focus on: (i) investigating sustainable opportunities provided by organic materials to produce alternative growing media; and, (ii) exploring compositions of substrates to maximize VGSs phytoremediation efficiency. This work presents preliminary results on the influence of almond shells as an alternative growing medium for VGSs on the removal efficiency of formaldehyde. For that, a VGS module with almond shells as substrate and a single species of ornamental plant was placed in a sealed chamber – specially designed to recirculate the air contaminated by formaldehyde through the module acting as an active biofilter. The system produced a clear reduction of the formaldehyde concentration, and the plants developed correctly with the substrate. Green buildingintegrated systems are multifunctional NBS which address challenges such as human wellbeing and circularity at local scale. Using organic growing media to improve the biofiltration capability of these systems is a promising alternative towards successful implementation in the built environment
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
Technical academia goes back to school: the role of universities in environmental and sustainable education for childhood
Full text linkThis paper aims to investigate the relationship between academia and society focusing on how technical universities perform Third Mission (TM) to promote knowledge outside the academic environment producing multiple benefits. This investigation is performed through the conceptual approach. The theoretical background of the TM is explored through scientific literature review. It analyses a selected pool of experiences focused on Environmental and Sustainable Education (ESE). The study identifies significant aspects of two specific case studies, designed and implemented by the authors. Outcomes show opportunities and limitations in the application of ESE on behalf of technical academia. The study suggests solutions, precautions and systemic changes to promote ESE for childhood as TM activity in technical engineering academia. These recommendations can be useful for policymakers to set academic goals and plan the strategic management of teaching, research and TM. The paper focuses on the role of technical engineering universities and criticalities faced by academics to foster and perform ESE. Future perspectives aim to create new opportunities to strengthen the social impact of scientific and technical research by building bridges with childhood education
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