1,720,980 research outputs found
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
Opere costiere per la difesa dei ripascimenti artificiali a basso impatto ambientale
No full textNel presente lavoro si riportano i principali risultati ottenuti durante una campagna sperimentale in corso presso il Laboratorio di Ingegneria Costiera (LIC) del Politecnico di Bari. Le attività sperimentali mirano ad ana-lizzare gli effetti del sistema di drenaggio spiagge (BDS) accoppiato ad una barriera sommersa ad elevata som-mergenza (c.a. - 1.80 m) sull’evoluzione trasversale a breve termine di un ripascimento artificiale, in condizioni ondose erosive. Le prove su modello fisico 2-D in scala geometrica indistorta di Froude 1:10 sono state condotte in condizioni non protette e protette, a partire dallo stesso profilo iniziale sino al raggiungimento del profilo di equilibrio (16-19 ore in scala modello). L’influenza dei due sistemi sui processi sottocosta è stata analizzata os-servando il comportamento del sistema di drenaggio spiagge (BDS) e della barriera sommersa (BW) prima se-paratamente e poi congiuntamente, al fine di poter scindere gli effetti di ciascun intervento sul trasporto dei se-dimenti. In via preliminare, i risultati sperimentali hanno inoltre consentito l’analisi delle capacità predittive del modello numerico XBeach (Roelvink et al., 2009) per lo studio dell’evoluzione del profilo trasversale di un ripa-scimento non protetto, nelle condizioni testate in laboratorio sul modello fisico. La sensitività del modello è sta-ta dapprima valutata in relazione alla discretizzazione spaziale della griglia e alla condizione ondosa al contor-no, consentendo la definizione di un modello base per la successiva fase di calibrazione rispetto all’evoluzione del profilo, considerando alcuni parametri coinvolti nella modellazione dei processi di idrodinamica e morfodi-namica. I primi risultati mostrano come, nonostante il modello restituisca un buon grado di accuratezza per la previsione dell’evoluzione morfodinamica del fondo e dell’idrodinamica, alcune incertezze risiedono nella mo-dellazione della forma della barra sommersa.The development of waterfronts constitutes a highly topical issue that involves large as well as small urban are-as facing the sea. Coastal areas represent the interfaces between the urban fabric and the sea, which is widely recognized as an engine for European economy. In order to exploit the potential that coastal areas offer, the planning and management strategies must be aimed at recovering the environmental quality which has seen its gradual decline, especially in recent years since the effects induced by climate changes exacerbate natural and anthropic pressures.
In agreement with Horizon 2020 and recently highlighted by the Blue Growth strategy undertaken by the Euro-pean Commission, it is necessary to encourage and support sustainable long-term growth in the marine and maritime sectors, through the strengthening of the seas, oceans and coasts in order to create new job opportuni-ties and companies in the Blue Economy productive sectors. Indeed, the protection of coasts and maintenance of a good quality of marine environments become a priority, to guarantee their sustainable use and reduce the ex-posure against erosion and flood phenomena that alter their stability, environmental quality and economical value.
In such a context, the rehabilitation of coastal areas often translates into the creation of artificial nourishments, which allow to restore an adequate extension of the emerged beach and the dune system, without compromis-ing the landscape and bathing activities. These interventions require an accurate management plan aimed at defining the financial sustainability of the work, mainly linked to its life-time.
In the present work, an alternative approach for protecting sandy beach nourishment is proposed. The short-term morphological evolution of beach nourishment profile under erosive wave conditions is investigated in presence of a mixed defence system composed by a drain pipe placed inside the beach in the swash zone, paral-lel to the shoreline, and a submerged rubble mound breakwater characterized by a high freeboard, namely equal to 90% of the offshore significant wave height below the mean water level.
A new experimental campaign is underway at the Coastal Engineering Laboratory of the Polytechnic University of Bari (Bari, Italy). The tests on 2-D small scale physical model (according to Froude analogy, 1:10) have been conducted in both unprotected and protected conditions starting from the same initial profile up to equilibrium conditions (16-19 hours in model scale). The drainage system (BDS) and the submerged barrier (BW) have been tested firstly separately and deployed together, in order to be able to separate the effects of each intervention on sediment transport. The experimental measurements have also allowed a preliminary calibration of the XBeach numerical model in reproducing the evolution of the nourishment profile in unprotected conditions
Dinamica dei sedimenti del Fiume Quequen Grande, Provincia di Buenos Aires, Argentina: studio preliminare
No full textLo studio riporta i primi dati di una campagna di misure di campo delle caratteristiche idrualiche della corrente e del trasorto solido al fondo ed in sospensione del fiume Rio Quequen in Argentina. Quetso fiume si caratetrizza per una relativamente ampia portata, ma un basso gradiente ed un bassissimo contrasto di rilievo
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
Circostanze e modi della diffusione della «Historia Baetica»
No full texta cura di M. Chiabò, P. Farenga, M. Miglio, con una nota musicologica di A. Morell
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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