1,720,961 research outputs found
Use of compost as amendment for soilless substrates of plants in green roof installations
No full textThe effect of amendment with compost obtained from food waste in soilless substrate was evaluated with respect to the growth of Sedum reflexum, Sedum palmieri, Sedum acre, Sedum spurium and Sempervivum tectorum under conditions simulating a green roof in central Italy. Plants were grown in a mix of soilless media developed for green roofs with 5 and 10% v/v amendment and a starter dose of fertilizer. The 5% amendment produced a significant increase of fresh and dry weight on Sedum reflexum plants growing in pots after 15 weeks. A long-term experiment was conducted in containers with 10% compost and the five species transplanted together with a fixed pattern. After 139 days, the compost amendment produced a significant increase on surface coverage for Sedum reflexum, Sedum palmieri and Sempervivum tectorum. The evaluation on day 251, at the end of the winter season, showed a reduced growth rate in the control, while the compost treatment produced significant increases for the Sedum species. The increase in plant weight was significant for Sedum palmieri, Sedum acre and Sempervivum tectorum. The N content at day 251 was higher in plants with compost, suggesting a compensation of the nutrient depletion and cold damage during the winter
Non-conventional biostabilisation technology of municipal solid waste
No full textThe aim of this work is to evaluate the effects of a natural enzymatic cocktail (PAV) on the biological stabilization processes of municipal solid waste (MSW) measuring the dynamic respiration index (DRI) and the biochemical methane potential (BMP). In a Southern Italian plant waste was treated mechanically and placed into three different piles: static non-treated, static treated with PAV, aerated, turned and treated with PAV. After sampling, respirometric analyses were carried out in laboratory. Experimental tests show that the treated piles led to significantly better results than the untreated one. This is reflected into better values of heap temperatures and DRI, concluding that an aerobic stability is achieved at the end of the experimental campaign. In particular, the PAV action appears to be more effective under static conditions, as periodic turnings bring about a physical scattering within the pile which in turn prevents temperature homogenisation. Conversely, the data interpretation of BMP is more debatable: the anaerobic test clearly ascertained a neat BMP diminution only for the heap which underwent periodic turnings, not allowing to attribute this anaerobic stability clearly to the effect of PAV. This study showed that the PAV use is promising for both an effective and economic waste management in landfill or mechanical and biological treatment plants
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
Attività sperimentale sull'impianto di compostaggio elettromeccanico Comar
Full text linkGli impianti elettromeccanici rappresentano una tecnologia impiantistica, scala pilota, dedicata al trattamento/recupero della frazione umida contenuta nei rifiuti urbani. Sono impianti utilizzati nell’ambito delle attività di recupero previste nel compostaggio di comunità e/o prossimità che rappresenta un settore intermedio collocato tra il compostaggio industriale e quello domestico; il loro utilizzo consente il trattamento di scarti organici prodotti in quantità limitata da piccole comunità,
mense scolastiche, comuni decentrati ecc. che conferiscono i propri scarti umidi direttamente in questi impianti ed utilizzano in loco il compost ottenuto. Avviata nei paesi del nord Europa, questa tecnologia si sta ampiamente affermando anche in Italia grazie alle caratteristiche demografiche-territoriali quali contesti montani ed insulari, piccoli comuni, case unifamigliari ecc.. in cui la frazione umida può essere gestita a km 0, con relativo riscontro economico derivante dal mancato costo di raccolta, trasporto e trattamento fuori sito della frazione umida dei rifiuti urbani.The Comar composter is an electromechanical system technology dedicated to the treatment/recovery of the organic fraction of municipal solid waste. These pilot-scale plants are used for community and/or local composting that represent an intermediate approach and scale between the industrial and domestic ones. Therefore, their use is recommended for the treatment of organic waste produced by small communities, school canteens or peripheral municipalities that can use the produced compost directly in situ. This technology was developed by the countries of northern Europe and in the last years it is spreading in Italy thanks to the specific Italian demographic and territorial characteristics such as mountain and island areas, peripheral small towns, etc. where the management of the organic fraction (collecting, transporting and off-site treatment) has an higher cost compared to large cities/areas
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
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