1,725,505 research outputs found
Een vegetatiekartering van het natuurmonument 'Quackjeswater' in de duinen van Voorne
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6182.pdf (Publisher’s version ) (Open Access)Summary lezing Koninklijke Nederlandse Botanische Verenigin
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
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
Investigation on the effect of ZrH2 addition on the L-PBF processability of EN AW 6182 aluminium alloy
No full textLAUREA MAGISTRALEIl seguente lavoro si inserisce nella cornice del progetto Samoa, avente l’obbiettivo dello sviluppo di leghe di alluminio per la additive manufacturing con bassa concentrazione di materiali grezzi considerati critici dall’EU. Lo sviluppo della polvere modificata, e quindi del processo di stampa, `e stato reso possibile grazie alla collaborazione con la start-up AM4AM. Una nuova lega di alluminio `e stata sviluppata partendo dalla lega EN AW 6182, caratterizzata dalla formazione di cricche a caldo durante lo stampaggio con metodologia L-PBF (Laser Powder Bed Fusion). In questo lavoro sono stati analizzati gli effetti dell’addizione “ex-situ” di particelle ceramiche di Idruro di Zirconio nella polvere di EN AW 6182. Sulla base delle curve di Scheil, `e stato fatto un paragone del comportamento durante la solidificazione della EN AW 6182 e della lega innovativa modificata con Zr. Le densit`a relative e le microstrutture “As-Built” di entrambe le leghe sono state investigate e comparate, in modo da verificare l’efficienza dell’aggiunta delle particelle di ZrH2 nella prevenzione del fenomeno di criccatura a caldo. Per capire l’influenza e la distribuzione delle particelle di Al3Zr sono state eseguite analisi al SEM. La risposta al trattamento di invecchiamento della nuova lega `e stato investigato per mezzo di numerosi test sulla micro-durezza eseguiti sia sul campione solubilizzato che su quello “As-Built” in modo da determinare le condizioni T6 e T5. Analisi meccaniche e della superficie di frattura sono state realizzate sulla lega di alluminio 6182ZrH2 in 3 differenti condizioni: As-Built; T5; T6. Analisi cristallografiche e sulle fasi sono state realizzate su campioni in 3 condizioni differenti: As-Built, T5, T6, per mezzo di analisi XRD e EBSD. Infine, sono stati stimati gli stress residui usando il diffrattometro XRD Rigaku SmartLab usando il metodo delSin2Ψ. Grazie alla nuova lega di alluminio un aumento della processabilit`a con tecnologia L-PBF `e stata ottenuta, `e stato quindi eliminato il fenomeno della criccatura a caldo, principalmente grazie alla fine microstruttura ottenuta grazie all’addizione di Zr che precipita sottoforma di particelle di Al3Zr che agiscono come siti di nucleazione eterogenea di grani. La lega 6182ZrH2 mostra una buona risposta ai trattamenti termici, e una buona stabilit`a termica. Gli intensi stress residui indotti contemporaneamente dalla presenza delle particelle e dal processo di stampa inducono un fenomeno di ricristallizzazione durante i trattamenti termici. A questo fenomeno `e associato una modifica della texture. Per via dell’alta concentrazione di idrogeno all’interno della lega, quest’ultima ha evidenziato un comportamento marcatamente fragile durante i test meccaniciThis work fits in the Samoa project framework, that is aimed at developing aluminium alloys for additive manufacturing with low concentration of critical raw materials. The development of the modified powder, and subsequently the printing process, was possible thanks to the collaboration with the AM4AM start-up company. A novel aluminium alloy has been developed starting from the EN AW 6182 alloy, strongly affected by hot-cracking phenomena when processed with LPBF (Laser – Powder Bed Fusion) technique. The effect of the ex-situ addition of Zirconium Hydride ceramic particles in the powder EN AW 6182 to increase the L-PBF processability of the alloy has been studied in this work. An initial comparison between the solidification behaviour of the EN AW 6182 and the novel aluminium alloy modified with Zr, based on the simulated Scheil curves, has been performed. Relative densities and as-built microstructure of these two aluminium alloys were investigate and compared to verify the efficiency of the addition of ZrH2 particles on the hot-cracking resistance of the novel material. SEM analysis were carried out to understand the influence and the distribution of Al3Zr second phase particles. The aging behaviour of the new alloy was investigated by means of hardness tests performed on samples aged for different times starting from both the as built and sol treated conditions. T5 and T6 conditions were thus determined. Mechanical tensile tests and fracture surface analysis have been performed on the 6182ZrH2 aluminium alloy in 3 different condition: As-built; T5; T6. XRD and EBSD analysis has been performed on the As-Built, T5 and T6 6182ZrH2 samples for phase and crystallographic texture investigation. A final estimation of the residual stresses, based on the Sin2Ψ method, has been conducted using a XRD Rigaku SmartLab machine. With the novel aluminium alloy an increase of the L-PBF processability has been achieved, i.e., no hot-cracking phenomena occurs, thanks mainly to the fine microstructure that is the result of the addition of Zr that forms Al3Zr particles that act as sites for the heterogeneous nucleation of grains. 6182ZrH2 showed a good response to the thermal treatment, and good thermal stability. The high internal stresses induced both by the presence of particles and by the L-PBF process induced a recrystallization phenomenon during the solution treatment associated with a strong change of the initial texture. Due to the high concentration of hydrogen the results of the mechanical test evidenced a brittle behaviour in all the condition of the novel aluminium alloy
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