1,720,958 research outputs found
Geotechnische Bewertung der Hangbewegung Corvara (Dolomiten, Italien) - Effizienz moglicher Sanierungsmasnahme
No full textIn den Dolomiten sowie im nördlichen Apennin ist das Phänomen großflächiger Schuttströme besonders weit verbreitet. Schuttströme sind Massenbewegungen, die vorzugsweise im Hang- und Verwitterungsschutt ausgeprägter, tiefgründig verwitternder Wechsellagerungen mit mächtigen Tonstein- und Mergeleinschaltungen auftreten.Ein solcher Schuttstrom erstreckt sich nahe dem Dorf Corvara. Während der jährlichen saisonal bedingten Reaktivierungsphasen entstehen häufig Schäden an Infrastrukturen. Die ontinuierlichen Bewegungen des Schuttstroms von Corvara führen fast alljährlich zu Schäden an der Nationalstraße 244, sowie an Stromleitungen und Liftanlagen, die sich auf dem Areal der Hangbewegung befinden. Benachbarte Siedlungen sind potenziell durch sekundäreMassenbewegungen (v. a. Murgänge nach Aufstau des Hauptvorfluters) bedroht.Aus diesem Grund wurden durch die Universität Modena und den Consiglio Nazionale delle Ricerche Padua (CNR-IRPI) mfangreiche Untersuchungen zur Geologie und Geomorphologie des gesamten Hanges durchgeführt. Ferner wurdeeine großflächig angelegte Monitoring kampagne umgesetzt, welche umfangreiche Messdaten, insbesondere Zeitreihen zu den Bewegungen sowohl an der Oberfläche als auch zum Bewegungsverlauf nach der Tiefe, zu Bergwasserspiegelständen und Porenwasserdruckschwankungen zusammen mit Klimadaten, erbrachte (Panizza et al. 2006)
Identification of constitutive parameters of soil using an optimization strategy and statistical analysis
No full textThe paper at hand investigates a strategy to calibrate different constitutive models for soils via back analysis. The efficiency and reliability of the parameter identification for soil models is worked out. In order to demonstrate of how to utilise identification procedures, results from optimisation against conventional oedometer and drained triaxial compression tests on natural Pappadai clay are presented and discussed. The aim of geotechnical optimisation problems is to obtain a set of model parameter values that provide the best match between soil model simulations and appropriate measurements. For the parameter identification process, a constrained population-based algorithm is chosen, namely the Particle Swarm Optimiser. The identification is carried out in an initial step separately on each test and then simultaneously on oedometer and triaxial tests. The evaluation is performed employing three different constitutive models of varying complexity and number of constitutive parameters.A subsequent residual analysis and the computation of confidence intervals for the parameters provide valuable results to assess the quality of the identified parameters in correlation with the evaluated data. Therefore, criteria of the utility and reliability of the mathematical models for further prognosis computations can be estimated. © 2012 Elsevier Ltd
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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