1,720,990 research outputs found
A regional spring database for groundwater management: The preliminary results of a case study in Molise region (south Italy) and the future perspectives
No full textA clear understanding of the groundwater system plays a leading role in the effective management of water resources and sustainable development. There is, therefore, a need to consider all available datasets, collate other supplementary data and update the present hydrogeological databases as an important source of information for decision-makers. Springs could be considered as hydraulic features for characterizing the basin-scale groundwater flow when there are not wells in a study area or there is limited access to them. In this study, the springs in some river basins in Molise region (southern Italy) are investigated. Between 1 and 1556 m a.s.l. (622 m a.s.l. on average), a total of 2681 springs (1620 perennial and 1061 non-perennial springs) were identified based on the Istituto Geografico Militare topographic maps at a 1:25000 scale. In springs, the hydraulic head is almost equal to the elevation head (h≈z). Regarding that groundwater flows from high to low hydraulic head (h), it could be concluded that the groundwater body generally flows from the mountainous area in the south and southwest towards the coast of Adriatic Sea in the north and northeast.For further investigation, 1237 springs in Fortore and Saccione river basins were considered and the following factors (as indicators of the areas with a high probability of groundwater spring presence) were obtained from the digital elevation model for spring orifices: altitude, slope degree, slope aspect, curvature, plan curvature, profile curvature, topographic wetness index (TWI), stream transport index (STI) and stream power index (SPI). Following log-transformation of altitude, slope degree, slope aspect, SPI, STI and TWI for obtaining more symmetric statistical distribution, the springs were categorized into three groups through the Grouping Analysis in ArcMap 10.8: Group 1 with 101 springs; Group 2 with 1003 springs; and Group 3 with 132 springs. The springs in Group 2, Group 3 and Group 1 occur at high (639 m), medium (475 m) and low (150 m) altitudes, respectively. The slope of spring orifices in Group 2 and Group 3 is almost similar, but steeper than that of Group 1. The SPI and STI increase from Group 1 to Group 3 while the TWI and slope aspect are not significantly different between the spring groups. The R-squared values show that altitude and slope are the most important variables for discriminating the groups. A literature study shows a greater probability of spring groundwater occurrence in areas at a higher altitude and with a steeper slope, but this should be confirmed in our study area after applying some modeling techniques and considering more complex relationships.This study presents a general overview of groundwater hydrogeology in some river basins in Molise region. It is noteworthy that the project is still ongoing and the database will be updated with a wider range of variables (e.g., hydrogeological complexes, distance to tectonic elements, spring discharge and spring water temperature when available) to obtain a comprehensive spring database and empower researchers supporting decision-makers for groundwater management
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
A framework for flow-like mass movements susceptibility analysis and zoning at medium scale
No full textAuthor-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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