1,720,968 research outputs found
Estimation of rainfall erosivity in Piedmont (Northwestern Italy) by using 10-minute fixed-interval rainfall data
Full text linkRainfall erosivity index (EI30) is widely used in soil erosion models for
predicting soil loss. This index consists in the product between the maximum intensity of
30-min rainfall and the total kinetic energy of a precipitation event. The main goal of this
study was to characterize the soil erosion in Piedmont (Northwestern Italy), studying the
magnitude, frequency, and trends of rainfall erosivity. Rainfall erosivity for twelve stations
well distributed over the whole region were firstly computed on the basis of 10-min timeresolution
rainfall data using a continuous 17-year series of daily rainfall events. For each
station the equation to predict EI30 from daily rainfall data was calculated, and, using the
Nash and Sutcliffe (1970) model-efficiency, the relationships between real EI30 and
modeled EI30 was validated. The rainfall erosivity model was applied to the long term daily
rainfall series of the selected stations, to create annual and seasonal erosivity time series
for the climate normal period 1986–2015. Afterwards, the Mann–Kendall non-parametric
test statistic to detect time trends in the rainfall erosivity time series was applied. The
results have led to the conclusion that the annual rainfall erosivity should have experienced
mixed trends in most of the study area, although more than half of the stations did not
show a statistical trend
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
Laboratory of Alpine Climatology (LabClima): a new research network for climate change research on Monte Rosa, Western Italian Alps
Full text linkIn this work we focus on the Monte Rosa massif, the second highest mountain of the Italian Alps. We investigate the warming rate of this area and how it affected the frontal evolution of its glaciers. Firstly, we analysed the temperature series of two weather stations, located in the Sesia and Lys valleys. Our analysis covers the twenty-year period from 2003 to 2022. From these series we extracted climatic indexes and their time trends. Our results showed an increase in minimum and maximum temperatures, with a significantly decrease in the number of days with extremely low minimum temperatures. We also col-lected data from the Bulletin of the Italian Glaciological Committee to investigate the oscillations of two glaciers of interest, namely the Lys and Indren Glaciers. We later compared their frontal variation from 1928 to 2017. This analysis showed a net retreat of both glaciers. The most severe retrocessions happened in recent years that also experienced severe droughts. During our work we noted the lack of data relating to elevations above 3000 m a.s.l.. The intention to fill this gap is one of the main motives behind the establishment of the Laboratory of Alpine Climatology. The Laboratory of Alpine Climatology (“Laboratorio di Climatologia Alpina” - LabClima in Italian) is a network of automated weather stations located in the Western Italian Alps. The first fully operational station of LabClima is Passo dei Salati (3030 m a.s.l.). The station has recently reached its first year of activity. In this work we briefly present the data collected so far. The second station, named Garstelet (3455 m a.s.l.), became operational in September 2024. LabClima focuses also on the deployment of innovative sensors in high elevation environments. The sensors intended to study the snow optical properties and the equivalent mass of water contained in the snowpack are presented in the last section of this work
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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