1,720,958 research outputs found
Rapid evaluation of rockfall risk scenarios for purpose of civil protection
No full textFor a rapid and complete definition of rockfall risk scenarios useful in terms of civil protection, a wellstructured
semi-automatic procedure, integrated with traditional methods, is presented. In order to cover a
wide range of features, and investigating the main advantages and drawbacks of the proposed approach,
the data collection was carried out in three different slopes along the Nera valley (Central Italy), which is
characterized by a high rockfall risk, especially in the villages and along the main roads, because of its
morphology, high local seismic activity and diversified rockmass features. The above-mentioned
measurement phase mainly consisted of laser scanning and geomechanical surveys; the latter were
executed by using both traditional methodology and by analy zing remote data obtained with the laser
scanning survey itself. All collected data were used to create a detailed digital elevation model, to obtain the
shape and volume of the most unstable blocks, to define the position of the main rockfall source areas, and
to precisely distinguish the outcropping materials and the position of the elements at risk for reliable runout
analyses. Such analyses were performed for each investigated site applying both 2D and 3D simulations.
Different risk scenarios with medium -high criticality have thus been highlighted, which can be useful in
supporting proper maintenance and land management policies both in ordinary circumstances and in
emergency contexts. Moreover the presented approach proved to be objective, reliable and easily
exportable, even if , each time, some integration to the local situations could be necessary
TXT-tool 4.039-3.1: Terrestrial laser scanner and geomechanical surveys for the rapid evaluation of rock fall susceptibility scenarios
No full textThis paper is aimed at presenting a semiautomatic procedure that, coupled with conventional methods, can be useful for a prompt definition of rock fall susceptibility scenarios with civil protection purposes. Due to its landscape morphology (steep slopes and narrow valley), regional seismicity, and rock mass characteristics, the Nera Valley (Valnerina, Umbria Region, Italy) is highly prone to rock falls. In order to cover a wide range of features and investigate the main advantages and drawbacks of the proposed approach, data collection was carried out in three different slopes by means of terrestrial laser scanning (TLS) and geomechanical surveys. Detailed three-dimensional (3D) terrain models were reconstructed to obtain the geometry of the most unstable blocks, to define the position of the main rock fall source areas, and to precisely distinguish the outcropping materials and the position of the elements at risk for reliable runout analyses. Consequently, the proposed approach can positively support proper maintenance and land management programs both in ordinary and in emergency circumstances
Terrestrial laser scanner and geomechanical surveys for the rapid evaluation of rock fall susceptibility scenarios
No full textThe primary objective of this paper is to present a semiautomatic procedure that, integrated with traditional methods, can be useful for a rapid definition of rock fall susceptibility scenarios with the purpose of civil protection. Due to its morphology (steep slopes and narrow valleys), regional seismicity, and rock mass characteristics, the Nera Valley (Valnerina, Umbria Region, Italy) is characterized by high rock fall risk. With the aim of covering a wide range of features and investigating the main advantages and drawbacks of the proposed approach, data collection (terrestrial laser scanning (TLS) and geomechanical surveys) was carried out at three different slopes. Detailed three-dimensional (3D) models were created to reconstruct the shape and volume of the most unstable blocks, to define the position of the main rock fall source areas, and to precisely distinguish the outcropping materials and the position of the elements at risk for reliable runout analyses. The proposed approach can be useful in supporting proper maintenance and land management programs both in ordinary and in emergency circumstances
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
- …
