1,720,957 research outputs found
Seismogenic fault system of the mw 6.4 november 2019 albania earthquake: New insights into the structural architecture and active tectonic setting of the outer albanides
No full textA seismic sequence that affected the Durrës region in late 2019 to early 2020 sheds new light on the structural architecture and active tectonic setting of the northern outer Albanides. Stress inversion analysis using focal mechanisms confirms that the area is dominated by ENE-trending horizontal maximum compression. The seismogenic sources consist mainly of ENE-dipping thrust faults roughly parallel to the coastline. The hypocentre distribution indicates that most of the earthquakes, including the Mw 6.4 main shock, nucleated within the basement, with only some of the shallow aftershocks tending to cluster around the deeper portion of previously identified seismogenic structures within the sedimentary cover. Our results, unravelling for the first time the fundamental role of deeply rooted, crustal ramp-dominated thrusting in seismogenesis, imply a profound reconsideration of the seismotectonic setting of the region in terms of a correct assessment of seismic hazard in this densely populated area of Albania
Identification of the fluvial sediment source areas in the Burano catchment basin (Cantiano, PU)
No full textClimate change and increasing anthropogenic pressure are two of the major drivers of increased frequency and the intensity of highly disastrous events like flash-floods in the drainage network. This is the case of Burano watercourse flooding, a tributary of the Metauro river, in the northern Marche region where high flow rates were recorded in a few hours in September 2022. This event resulted in about 13 fatalities, 50 injuries and critical damages to infrastructure during the disastrous inundation. In this scenario, the current strength also generates solid transport of large amounts of sediments, increasing the hydrogeological risk of flooding in densely populated areas located close to the river bank. Therefore, the main purpose of this work is understanding solid transport, focusing on the identification and characterization of the sediment sources and sink areas by a GIS-based remote sensing approach. Source material comes from both linear zones, where the detritus moves along a well-defined direction, and areal sources understood as landslides along slopes and extensive erosion zones (e.g. gullies), which demonstrate a connection with the hydrographic network. Through new geomorphometric approaches, it is possible to characterize spatial patterns of sediment connectivity by enabling the quantitative modeling of sediment discharge. The proposed methodology consists of a study of the current geomorphological framework as well as an analysis of morphological variations in the riverbed that result in changes in width, profile and pattern of the river, and a characterization of the sediment along the water network. Preliminary analysis of satellite imagery among different time periods (1977, 1987 and 2022) are performed to study the evolutionary trends of river network and longitudinal profiles of channels are also used to highlight anomalies in steepness (knickpoints or kinckzones). Landslide and areas characterized by an intense erosion, provided by various databases (e.g. Hydrogeological Basin Plans - PAI, Italian Landslide Inventory - IFFI) and collected during fieldwork, are joined in a database in GIS environment allowing to create a new geomorphological map of the upper part of the Metauro basin. Moreover, lithology (substrate and quaternary deposits), slope, presence of vegetation, the sources and the distance of hydrographic network are some of geomorphological features taken into consideration for the estimation of the sediment. The results obtained during the process allowed to define the source sediment areas and to create a landslide susceptibility map, with the union of all the data it was possible to analyze sediment connectivity along the riverbed. The applications demonstrate that a reliable assessment of sediment connectivity via geomorphometric approach, especially when integrated with a sediment sources inventory, is useful for giving management priorities by the competent authorities in reducing hydrogeological risk
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
Morphostructural evidence of crustal-scale, active along-strike segmentation of 1 the Umbria-Marche Apennines, Italy
Full text linkThis paper discusses the response of topography and river networks to non-uniform lithology and tectonic forcing in the Umbria-Marche sector of the Apennines fold and thrust belt. We are able to control for variable resistance to erosion of rock types and interpret channel steepness data in terms of rock uplift, discovering a southward increase in the total amount of uplift. Such a trend appears as the large-scale response to uneven vertical motions of different sectors of the mountain ridge and foothills. The general coincidence between sector boundaries and transversal, NE-SW striking faults mapped by seismic interpretation in the outer zone of the fold and thrust belt, suggests that such faults extend to the SW, beneath the allochthonous thrust sheets of the mountainous area. Therefore, it may be inferred that such transversal faults represent long-lived, deeply rooted basement structures compartmentalizing both the axial and the outer zones of the fold and thrust belt. We suggest that differential uplift was essentially controlled by variable amounts of basement thrust displacement characterizing the compartmentalized belt. This interpretation deviates from a more conventional view that uplift of the central Apennines, particularly prominent in the south, is dynamically supported. Our results, besides shedding new light into the active tectonic behavior of a large portion of the Italian peninsula, also provide general insights into the surface response to the differential behavior of crustal blocks produced by along-strike segmentation of active mountain belts
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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