1,720,963 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
Design and development of a measurement system in order to simulate packaged load behavior during transport
No full textLAUREA MAGISTRALEL’industria del packaging è in rapida ascesa negli ultimi anni e richiede continuamente nuove tecniche per lo sviluppo e l’ottimizzazione. In questo settore il produttore si concentra sull’obiettivo di assicurare un packaging adatto a contenere il carico in un certo volume cercando contemporaneamente di proteggerlo dagli effetti dell’ambiente. Una delle maggiori criticità di questo settore si incontra quando, durante la manipolazione ed il trasporto, i prodotti possono subire conseguenze disastrose per la loro integrità. Questo fatto ha incoraggiato i produttori a sviluppare nuove tecniche per studiare le condizioni ambientali e i livelli di sollecitazioni subiti dai prodotti durante la loro movimentazione. Solo così infatti si possono cercare soluzioni innovative più efficaci nel contenimento e nella protezione dei prodotti.
In questo lavoro di tesi ci si concentrerà su quelli che sono gli aspetti legati al trasporto dei prodotti imballati, cercando di fornire gli strumenti adatti ad acquisire informazioni relative al comportamento del carico pallettizzato durante il trasporto stesso e a simularlo tramite test in laboratorio. Per rendere possibile questa indagine verrà creato un prototipo di “pallet strumentato”, progettato per ospitare i sensori necessari ad acquisire i dati di moto e di ambiente relativi al trasporto. Tali risultati verranno presentati per un percorso di prova, quindi analizzati ed interpretati in relazione ai dati discussi nella ricerca bibliografica. Al termine del lavoro si analizzerà brevemente la piattaforma vibrante che è stata scelta per simulare i trasporti reali di cui sono stati acquisiti i dati.The packaging sector is rapidly rising in the last years and it is continuously looking for new techniques for development and optimization. In this industrial sector the producer has the target to ensure a packaging able to contain the load within a certain volume and at the same time to protect it from the environmental effects. One of the most critical issues in this sector is related to handling and transport of the products, when they can experience disastrous consequences for their integrity. This fact has encouraged the producers to develop new techniques to investigate the environmental conditions and the level of stress acting on the products during handling. Only in this way it is possible to look for new innovative solutions, more effective in the containment and protection of products.
In this thesis work we will focus on those aspects related to transport of palletized products, trying to provide the correct instruments able to acquire information about palletized load behavior and to simulate it by means of laboratory tests. In order to make possible this study we will create a prototype of “instrumented pallet”, designed to contain the sensors required to acquire motion and environmental data. We will show these results for a test path, so we will analyze and understand the data in relation with those seen in literature. At the end of the work we will briefly analyze the vibrating platform chosen to simulate the real transports characterized by the acquired data
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
Modellazione numerica di una macchina utensile per la seconda lavorazione del legno
No full textIl lavoro di tesi ha avuto come obiettivo di ottenere un modello agli elementi finiti di una specifica macchina utensile per la seconda lavorazione del legno e di svolgere una serie di simulazioni statiche e dinamiche lineari confrontando, poi, i risultati numerici con dei riscontri sperimentali precedentemente acquisiti.
Inizialmente i componenti strutturali principali del centro di lavoro sono stati modellati e semplificati a livello geometrico, successivamente sono stati discretizzati mediante opportuni elementi finiti, per poi essere assemblati ad ottenere il modello FEM della macchina completa.
Prima di svolgere le simulazioni numeriche sono state aggiunte nel modello anche le masse non strutturali più significative, senza le quali si sarebbe ottenuto un modello corretto dal punto di vista della rigidezza statica, ma molto approssimato dal punto di vista dinamico.
Successivamente sono state svolte alcune simulazioni statiche andando a rilevare i cedimenti in zone specifiche della struttura, in modo da ottenere i valori di rigidezza statica da confrontare con i relativi dati sperimentali. Dal punto di vista dinamico, con il modello è stata simulata un'analisi modale al fine di vedere le deformate e le frequenze relative ai primi modi di vibrare della struttura; a livello sperimentale invece erano state misurate le accelerazioni a seguito di un'eccitazione impulsiva in punti specifici della macchina, ottenendo i relativi spettri in frequenza (dove possibile anche le FRF). Sono, inoltre, state svolte alcune simulazioni che non presentano dei riscontri sperimentali, ma i cui risultati permettono comunque di fare ulteriori considerazioni sulla macchina.
Si è ritenuto che, nel complesso, il modello riproducesse in modo attendibile quanto visto sperimentalmente, considerandolo perciò un sistema efficiente e integrabile in una logica di progettazione e analisi per eventuali future modifiche e ottimizzazioni strutturali
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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