1,720,967 research outputs found
Effect of compost amendment on rhizosphere bacterial communities and yield of lettuce in soilless substrate
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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
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
Sustainable and energy saving urban horticulture on rooftop gardens in Mediterranean climatic conditions
No full textThe aim of this work is the development of sustainable methods for the cultivation of vegetables in a seasonal succession on rooftop gardens, using containers and soilless substrates with addition of organic matter obtained from the recycling of food waste. The experiment was conducted on a terrace in central Italy in substrates of 17 cm depth, with controlled release fertilizer 15N-9P-15K and the following amendments: 5% compost, 5% biochar and 5% compost + 5% biochar. After the harvest the same substrates were used for the fall cultivation of Cichorium endivia, followed by Lactuca sativa in the spring. The amendment with compost + biochar produced an increase of the size of tomatoes, and biomass of the leafy vegetables. A second experiment evaluated the growth of aromatic species (Rosmarinus prostratus, Salvia officinalis, Thymus citriodorus) in soilless substrate and improvement of the plant growth was detected after amendment with 10% of compost. The evaluation of thermal parameters of installations with aromatic plants presented a decrease of the temperature of the substrates and the space under the structure, in relation to the plant development. The results suggest the feasibility of perennial aromatic plants for green roof installations aimed at mitigation of the indoor temperature in the summer periods. © ISHS
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
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