1,720,971 research outputs found
The effect of block braking on the residual stress state of a solid railway wheel
No full text, awarded with "The Alfred Rosling Bennett Premium/Charles S Lake Award 1998
Analysis and design of a low noise railway wheel
No full textthe design and construction of a new 'constrained layer' damping treatment for railway wheels is presented. A numerical procedure was used for the loss factor calculation. This procedure, first verified on a plate by means of experimental modal analyses, allowed the best treatment thickness and arrangement to be chosen among those commercially available and technologically feasible. The work ended with the construction of a prototype and subsequent tests in the laboratory and in the field. The success of these tests justified the start of production of low-noise wheels treated in this way
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
Online communication and political participation: a study dedicated to the referendum Cannabis Legale
No full textLo studio mira all’integrazione di dati provenienti dai social network Instagram e Twitter e dalla
piattaforma di raccolta firme Raccoltafirme.cloud con l’obiettivo di analizzare la comunicazione
politica in relazione alle caratteristiche sociodemografiche dei sottoscrittori della prima raccolta
firme interamente digitale per la convocazione di un referendum, il Referendum Cannabis Legale.
La sottoscrizione digitale legalmente vincolante per la richiesta di referendum e leggi di iniziativa
popolare è stata introdotta soltanto nel luglio del 2021 con l’approvazione della legge 77/2021.
Svoltosi nel settembre 2021, il referendum Cannabis Legale ha ottenuto e superato in soli dieci
giorni la soglia di 500.000 firme, una novità assoluta nel contesto democratico italiano, avvenuta
grazie al riconoscimento dell’online come spazio concreto di partecipazione politica.
La digitalizzazione del processo di raccolta firme non sostituisce ma affianca la raccolta firme su
carta; tuttavia, l’innovazione apportata è radicale in quanto l’online non rappresenta più l’ambito
della sola promozione e del dibattito sul tema ma diventa lo spazio principale in cui l’intero
fenomeno può crescere e concludersi, trovando nei social network il luogo ideale in cui svilupparsi.
Risulta rilevante comprendere quali forze abbiano animato il dibattito online e come esso si sia
articolato alla luce della rapidità con cui le firme sono state collezionate.
Il metodo applicato è di tipo misto sequenziale: ad una fase di esplorazione tramite osservazione
partecipante è seguita la raccolta dei dati e l’analisi dei testi contenuti delle piattaforme social
integrati con quelli dei sottoscrittori della proposta referendaria su base territoriale a livello
regionale. In seguito, l’interpretazione dei risultati dell’analisi è dipesa da un’ulteriore fase
qualitativa messa in atto attraverso interviste effettuate con membri del comitato promotore del
referendum Cannabis Legale.
La ricerca è in fase avanzata ma non ancora conclusa, i risultati attesi chiariranno il profilo di chi ha
scelto di trattare il tema referendario sui social network e una stima del ruolo dei social network sul
coinvolgimento politico. Rischi e benefici della partecipazione democratica al mondo online
dovrebbero essere osservati cominciando dalle dinamiche dell’informazione che ne governano i
flussi. È necessaria l’adozione di tecniche integrate in metodi misti per fenomeni tanto complessi
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
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