1,720,955 research outputs found
Transtensional deformations and oblique-slip fault propagation: an example from the Lucanian Apennine, southern Italy
No full textFaults and fractures are the dominant modes by which the upper brittle crust accommodates deformation, and an extensive documentation of their geometrical and kinematic features is critical for a better understanding of how these structures enucleate and evolve through time. The map distribution and cross-sectional profile of macroscopic normal faults suggest that these structures enucleate as smaller isolated segments, and that individual segments are linked to produce larger faults as their tips propagate laterally and down-dip. By contrast, documentation of these relationships in outcrop-scale examples is relatively less abundant, and mesoscopic information on the modes of linkage of isolated fault segments is quite rare: yet, minor structures are often well exposed, thus allowing for a detailed determination of the processes responsible for their development. In this study we document a situation from the Potenza Basin (Southern Apennines, Italy) where a mesoscopic transtensional fault array grew by linkage of smaller isolated fault segments. Observations of the zones of fault segment overlap provide the basis for a kinematic deformation model of stepped ramp-flat fault surface development. Because of the need of investigating at the early stages of faulting, we restricted our analysis to very small structures, where the overprinting relationships among minor fabrics are particularly clear. The present investigation represents the methodological continuation of two earlier contributions and aims at comparing the results from fault analysis in the Potenza Basin with those recently obtained for the high Agri Valley
Foreland-directed gravitational collapse along curved thrust fronts: insights from a minor thrust-related shear zone in the Umbria–Marche belt, central-northern Italy
No full textGravitational collapse occurs during the mature evolution of orogenic belts, but its signature is difficult to discriminate in macroscopic structures from that of pre-, syn- or late-/post-orogenic extension, so reliable mesoscopic examples are particularly useful. A composite fabric developed along a lateral thrust ramp in the Apennines reveals mesoscopic normal faults that truncate the thrust surface, overprint the S-fabric and merge downwards in a foreland-directed splay, leaving the thrust footwall undeformed. These relationships indicate syn-/late-thrusting extension, which we interpret as induced by hanging-wall gravitational collapse. Our study provides critical constraints for reconstructing the kinematic evolution of collapsing thrust fronts
Oblique-slip fault growth by segment linkage: a case from Basilicata, southern Italy
No full textFaults and fractures are the dominant modes by which the upper brittle crust accommodates deformation, and an extensive documentation of their geometrical and kinematic features is critical for a better understanding of how these structures enucleate and evolve through time. The map distribution and cross-sectional profile of macroscopic normal faults suggest that these structures enucleate as smaller isolated segments, and that individual segments are linked to produce larger faults as their tips propagate laterally and down-dip. By contrast, documentation of these relationships in outcrop-scale examples is relatively less abundant, and mesoscopic information on the modes of linkage of isolated fault segments is quite rare: yet, minor structures are often well exposed, thus allowing for a detailed determination of the processes responsible for their development. In this study we document a situation from the Potenza Basin (Southern Apennines, Italy) where a mesoscopic transtensional fault array grew by linkage of smaller isolated fault segments. Observations of the zones of fault segment overlap provide the basis for a kinematic deformation model of stepped ramp-flat fault surface development. Because of the need of investigating at the early stages of faulting, we restricted our analysis to very small structures, where the overprinting relationships among minor fabrics are particularly clear
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
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