1,720,954 research outputs found
The northern arch of the Augustus Bridge in Narni.
No full textThe Augustus Bridge is a monumental bridge viaduct on the river Nera, north of the town of Narni, built in Roman times and attributed to the reorganization of the Via Flaminia made by Augustus (27 BC). The bridge is made up of four arches, of which only the first survives to the south, has always been a source of admiration for the size and the shape and has been the subject of technical studies and artistic representations. In recent times it has been the subject of some laser surveys and of various structural models, also via finite elements, moreover, also following some seismic events, works have been made to consolidate the surviving parts. Despite the various studies, due to the changes that have taken place over the centuries, both due to natural collapses and due to degradation from anthropic actions, there are still many questions that have not received a precise answer: the slope with the exact dimensions for the arches, the shape of the access routes, the origin of the materials, the absence of breakwaters, the diversity of the shape of the remaining piers and arches. In the present work, the authors, as a complement to papers written in the last years, have focused on the appearance of the northern arch of the bridge, which has a particular ribbed shape, indicated by various authors to be similar in some respects to the roofing vault of the temple of Diana in Nimes, and after having sought its diffusion in other Roman contexts, they also studied its structural behavior through a series of finite element models
THE FOURTH ARCH OF THE AUGUSTUS BRIDGE AT NARNI (ITALY): A CASE STUDY OF ROMAN ARCH WITH RIBS
No full textThe roman bridge said of Augustus (27 BC) is a monumental viaduct on the Nera River, north of the town of Narni. The bridge is made up of four arches, of which only the first survives to the south, has always been a source of admiration for the size and the shape and has been the subject of technical studies and artistic representations. The remains of the fourth arch, the northernmost, show a very particular ribbed appearance, noted by many authors, among all: Balance, Choisy and Galliazzo. Some authors indicate the fourth arch to be similar in some respects to other arched structures (bridges or basilicas roofs), for example to the roofing vault of the temple of Diana in Nimes or to the Roman bridge in Nimreh, ancient Namara, in Syria. The authors of the present study, through a bibliographic research, having verified the diffusion of this shape in other Roman contexts, believe that at to date there do not seem to be other similar examples. The fourth arch appears to be unique in relation to the arrangement of the voussoirs, which are set to be more connected than a simple overlap of elements. However, the different radial depth of the voussoirs could have caused less effectiveness, especially in relation to possible movements related to the thrust of the arch on the springer and in concurrence with the second (from the south) pier subsidence with possible detachment and the consequent collapse of the central voussoirs. The subsidence of the second pier, which finally collapsed in 1885, is indicated by many authors as the main cause of the collapse of the central arch. In this work, the study of the subsidence and collapse of the second pier is also investigated through 3D FEM modeling of the pier and of the entire bridge. Finally, a set of 3D FEM models was presented to analyze the structural feature of the fourth arch of the Augustus Bridge, the executive assembly modalities, especially in the keystone area, compared to the same arch without emptiness among the ribs
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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