1,721,590 research outputs found
Hydro-morphologic modelling for different calamitous scenarios in a mountain stream
No full textAnalysis of different scenarios is addressed for the Mallero river, a mountain stream in northern Italy. A town (Sondrio) is present at the downstream end of the river. Flood hazard for Sondrio can be related either to flood events with significant sediment transport (because the in-town reach is a preferential location for aggradation processes with resulting increase of the water elevation) or to dam-break events (in case of collapse of a major landslide at relatively short distance upstream). Therefore, the manuscript explores the use of hydro-morphologic modelling to assess the level of hazard related with the scenarios for flood with intense sediment transport and for landslide and following dam-break wave. For the first scenario, a past event (flood of 1987) is considered, that has been already object of previous investigations. Propagation of the flood wave and resulting river morphologic changes are modelled using the coupled Saint-Venant and Exner equations. For the second scenario, different models are combined in an integrated process chain: available estimations of the landslide volume and models for dam breaching are used to create inflow conditions in terms of water and sediment discharge into the river, then the wave propagation is modelled again using the shallow-water, one-dimensional approach. For both scenarios, the analysis is devoted to assessing if these waves could be able to transport a significant amount of sediments to Sondrio, maximum elevation of the water surface and characterization of the time scales for the events. The role of analyses such as that presented here for territorial management and protection is discussed
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
Evaluation of the DSSAT CSM-CROPGRO-Tomato Simulation Model for Processing Tomato (Lycopersicon esculentum Mill.) Production in Northern Italy
No full textItalian processing tomato market has its dominance at global level but very few
studies have been made on modelling this crop. The Cropping System Model CSMCROPGRO-
Tomato model of DSSAT (Decision Support System for Agrotechnology
Transfer) software, was tested using datasets collected from field experiment in
Legnaro, northern Italy. The experiment was carried out in 2009 using four different
transplanting dates starting from 11th March (TD1, TD2, TD3, and TD4) with ten-day
intervals, four processing tomato varieties, and two agronomic practices (mulched and
non-mulched soil). Plants under mulched conditions in all transplanting dates gave
better performance in terms of yield, growth and water use efficiency. Under mulched
conditions, NPT 63 variety had significantly better yield and water use efficiency than
the other three varieties. Mulching the soil was a useful tool to decrease water
consumption levels at the transplanting dates studied. Evaluating the model using
non-mulched experimental datasets showed that index of agreement (d-Stat) values
between observed yield and model simulation for the first planting date with the four
varieties ranged between 0.69 and 0.99. The model was able to simulate growth
development better for all varieties under TD2, TD3, and TD4 conditions. In order to
validate simulation ability of the model for the final yield, further work should be
done regarding the genotype coefficients for each variety under study
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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