1,720,956 research outputs found
Assessing Hazardous Spills Impact on Road Surface Performances by 3D High Resolution Surveying Techniques
No full textSurface texture of a road pavement is recognized as one of the most
relevant parameters in driving safety. Spillages on the highway can lead to dangerous
conditions for road users and cause damage to the road surface. Hazardous
substance spills caused by traffic accidents threaten the safety road and request a
specific clearance operation to reduce the risk of asphalt surface degradation. The
aim of this paper is to evaluate the effect of usual hazardous liquids spilled during
traffic accidents from vehicles on the asphalt properties and related safety parameters.
The experimental application is performed via digital photogrammetry. The
application of 3D geomatic techniques allows to calculate new texture indicators
through geometric and colorimetric information more accurate than traditional
survey techniques. The proposed approach can constitute a new useful investigation
method, in addition to traditional surveys, which are slower and less precise.
The texture reading by using three-dimensional analysis is an innovative way to
obtain and compare the traditional performance indicators used to measure friction
with new proposed indicators. In particular, the described experience evidences
the mechanical behaviour and the structural damage of asphalt samples related
to different exposure times treated with five hazardous liquids. Both traditional
and innovative techniques are carried out to evaluate roughness (British Pendulum
Number, BPN). The obtained results show how the various substances affect in
different way the samples asphalt surface
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
Progetto della sovrastruttura del nuovo terminal container in Area Trattaroli Destra a Ravenna
No full textLo scopo della presente tesi è quello di proporre delle tipologie di sovrastrutture per il nuovo terminal container del Porto di Ravenna in Area Trattaroli Destra. Nel recente passato l’area oggetto di studio è stata utilizzata come cassa di colmata per la raccolta dei materiali derivanti dal dragaggio dei fondali. Il principale vincolo strutturale da affrontare è legato alla realizzazione di un’infrastruttura imponente in un’area caratterizzata da un sottosuolo con scadenti proprietà fisico-meccaniche. All’analisi geologica e geotecnica delle caratteristiche del terreno presente in sito è seguita la valutazione dei benefici indotti dalla realizzazione di un terrapieno per l’accelerazione del processo di consolidazione. Definite le destinazioni d’uso del terminal e le tipologie di carichi gravanti, si è proceduto analizzando due tecniche di consolidamento idonee al contesto operativo: trattamento a calce/cemento e stabilizzazione di massa. L’analisi per determinare la migliore tipologia di trattamento per le diverse aree previste è stata condotta attraverso il programma FLAC 2D. Infine, con il supporto del software ALIZE-LCPC vengono condotte le verifiche strutturali per le seguenti soluzioni progettuali proposte considerando le proprietà del sottosuolo e l’entità del carico di traffico: pavimentazione flessibile (Sol. A) e pavimentazione semirigida (Sol. B) nel progetto della viabilità ordinaria; pavimentazione semirigida (Sol. C) nel progetto della viabilità nell’area destinata alla movimentazione dei container. Le soluzioni progettuali finali proposte sono: consolidamento superficiale a calce/cemento e pavimentazione semirigida (Sol. B) per l’area destinata alla viabilità ordinaria; consolidamento profondo massivo e pavimentazione semirigida (Sol. C) per le restanti aree del terminal portuale
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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