1,720,956 research outputs found
Resistographic inspection of ancient timber structures for the evaluation of mechanical characteristics
No full textAmong non-destructive testing methods for the analysis of ancient timber structures, the Resistographic method is gaining great diffusion. This method is based on the registration of density, variations through timber sections by means of an electronic drill and nowadays it is generally employed only to detect the presence of defects and damage. The present study is about the use of Resistographic method to evaluate mechanical characteristics of timber and, with this aim, an experimental program on wood-worm damaged timber has been carried on. Results show the usefulness of this non-destructive testing method as it allows the investigation through the interior part of timber and thus can give a quite reliable idea of local strength of wood in the examined section. That gives an useful parameter for the detection of recoverable elements in standing timber structures to be restored. In the present research, beech compressive strength has been evaluated from small clear wood specimens, while the evaluation of strength of dimensional lumber is outside the scope of the work
EVOLUZIONE DELLA CAPRIATA LIGNEA DALLE ORIGINI AL XIX SEC.
No full textLa ricerca segue lo sviluppo tipologico delle capriate lignee, analizzando il loro comportamento statico e l’evoluzione degli schemi strutturali, in riferimento a determinate periodi storici, attraverso l’esame di alcune strutture ritenute significative e della trattatistica coeva. Infatti lo studio delle descrizioni, delle critiche e dei dibattiti riportati da questi manuali rende possibile discernere tra intuizione innovativa fondata su nuove conoscenze e corrente pratica del costruire. In particolare, per poter proporre una valutazione comparativa dei diversi schemi strutturali, si è fatto ricorso ad un concetto di efficienza strutturale che lega lo stato tensionale di ogni tipo di struttura alla quantità di legno impiegata per realizzarla. A tal fine, per alcuni esempi ritenuti significativi, si è proceduto, a partire dalla documentazione disponibile in letteratura, alla costruzione dello schema statico, tenendo conto delle effettive condizioni di vincolo interne ed esterne, alla definizione dei carichi agenti, ed infine al calcolo numerico tramite un programma di calcolo agli elementi finiti, con una schematizzazione monodimensionale in regime elastico lineare. Nell’ambito del ricco repertorio di schemi classici realizzati nel corso dei secoli, si è scelto di effettuare l’analisi di due delle più antiche opere pervenute ai nostri giorni, quelle del Monastero di Santa Caterina sul Monte Sinai del VI sec d.C., e quelle della Cattedrale di cefalù, del XII sec., e delle capriate del V e del IX src. D.C. della Chiesa di san Paolo fuori le mura, così come documentate nella trattatistica. Tra le più importanti realizzazioni dell’architettura gotica francese, si sono studiate le carpenterie di copertura della Cattedrale di Notre Dame in Bayeux e della Chiesa di St. serge in Angers
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
A scenographic solution for a Neapolitan bridge in the beginning of nineteenth century
No full textObject of the present study is the masonry bridge, still standing, built for King Ferdinand I of Bourbon, in 1818, by the court scenographer and architect Antonio Niccolini, in the Villa Floridiana Park in Naples. The original drawing, plan and front view, of Niccolini’s design is kept in the Archive of the Saint Martin Museum in Naples. The bridge, made of Neapolitan tuff and bricks, with a single polycentric arch, spanning thirty metres, can be ascribed to the typology of lightened tympanum bridges, in which continuum masonry in the backfills is substituted by a system of vaults leaning upon the extrados of the underlying arch. The static behaviour of the bridge will be studied, basing upon a detailed survey and an accurate examination of the historical sources, also employing the graphical methods known at the age of its realization
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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