1,720,980 research outputs found
Old domains in the South Adria plate and their relationship with the West Hellenic front
No full textThe compactness and continuity of the Apulia carbonate platform, outcropping on the Salento penin-sula, contrasts with the structural complexity that developed during the Mesozoic–Miocene in the mostsouthern region, which was later affected by the Neogenic compression of the Calabrian and HellenicChains. Although the north-eastern margin of the Apulia carbonate platform has been clearly definedby seismic profiles in the South Adriatic basin, the identification of the southern platform margin andthe transition between the Apulia and Pre-Apulia units are more difficult. Our analysis, based on seismicfacies interpretation, suggests a complex trend of a reefal margin between the carbonate platform and anewly recognized deep basin, herein called as the South Apulia basin. This margin transversely crossesthe Otranto Channel from the Apulian coast, where it outcrops, to the Albanian/Greek coasts, where theplatform sinks below the Albanian/Hellenic Chain. The South Apulia basin originated from an extensionalphase that was probably active during the Jurassic. Furthermore, this pelagic sequence depicts a troughthat was almost partially separating the Apulia from the Pre-Apulia units, these last being widely exposedon the Ionian islands of Greece.The alternation of pelagic and differently evolved carbonate platform domains of the South Adria plateaffected the westward migration of the Hellenic Arc quite significantly. The thinner fractured foreland,which is characterized by pelagic sequences, is more suitable for underthrusting the chain, as does theSouth Apulia basin below the Corfù external front. In contrast, the thicker foreland sectors, which areassociated with the carbonate platform, resist flexural subsidence, similar to the Apulia and Pre-Apuliacarbonate platform domains. At a certain location, the thick, less-heaving foreland, which is resistantto subsiding, was overcome by compressional stress and thrusted as the Apulia units in the Karaborunpeninsula/Sazani isle. In the Paxos island, the carbonate platform has been uplifted by a salt diapir thatwas triggered by the Hellenic compression.The Cephalonia system cuts the Hellenic Chain with right transpressional tectonics, in response to thedifferent buoyancies of the foreland sectors to the westernmost prolongation of the North Anatolia Fault.While on the northern sector, the front of the chain currently has stopped to the east of the Apulia car-bonate platform, on the southern sector, the Ionian oceanic foreland is subducting below the Pre-Apuliaunits, a previous foreland of the Ionian units. This shifting of the Hellenic front through the Cephaloniasystem (from the eastern margin of the Apulia carbonate platform to the western margin of the Pre-Apulia zone) has caused an apparent horizontal displacement that is greater than the actual throw of theoverriding sequences
Portweather: A lightweight onboard solution for real-time weather prediction
No full textMaritime journeys significantly depend on weather conditions, and so meteorology has always had a key role in maritime businesses. Nowadays, the new era of innovative machine learning approaches along with the availability of a wide range of sensors and microcontrollers creates increasing perspectives for providing on-board reliable short-range forecasting of main meteorological variables. The main goal of this study is to propose a lightweight on-board solution for real-time weather prediction. The system is composed of a commercial weather station integrated with an industrial IOT-edge data processing module that computes the wind direction and speed forecasts without the need of an Internet connection. A regression machine learning algorithm was chosen so as to require the smallest amount of resources (memory, CPU) and be able to run in a microcontroller. The algorithm has been designed and coded following specific conditions and specifications. The system has been tested on real weather data gathered from static weather stations and onboard during a test trip. The efficiency of the system has been proven through various error metrics
Analysis of global navigation satellite system data along the Southern Gas Corridor and estimate of the expected displacements
No full textIn the present paper, we analyze the final part of the Southern Gas Corridor, a route highlighted in the European energy security and energy union strategies. This route crosses one of the most seismically active zones of theMediterranean with several recognized crustal-scale seismogenic sources. We focus on the possibility of identifying the areas where critical differential motions could be expected along the route,which will be occupied by the Trans Adriatic Pipeline, over the nominal pipeline life span of 50 yr.We analyze the available global navigation satellite system data and compare the results to the deformation patterns of the most significant faults affecting the area.We interpolated the sparsely available velocity vectors and calculated strain rate information, both considering the region as a continuum and by applying an original algorithmthat allows the linear interpolation within individual blocks. The blocks are characterized by a relatively homogenous deformational behavior, or a specific tectonic setting, independently upon the neighboring ones. The results of the two methods are then compared by calculating the maximum displacement that would cumulate in the next 50 yr of the pipeline lifespan and the differential displacements that could cause possible bending phenomena to the pipeline structure. The methodological approach followed in this research could be applied to other infrastructures to identify the segments prone to localized deformation because of interseismic tectonic loading
Multi-fold GPR study of shallow structure and stratigraphy of unconsolidated sediments and rocks
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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
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