1,721,698 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
Laser metal deposition employing scanning optics
No full textLaser metal deposition (LMD) as an additive manufacturing (AM) processes is characterized by high deposition rate, high material usage and possibility of building on existing components. The combination of directed powder with scanning optics can open up different possibilities combining high deposition rates and improved detail on demand. The main aim of this work is to present a preliminary study on the application of laser metal deposition with scanning optics and 1 kW multi-mode fibre laser. First, the hardware developed for the LMD process with scanning optics, in particular the custom nozzle for powder delivery is presented. Then, a simplified thermal model is discussed for a better comprehension of the effect of the scanning parameters on the thermal cycle. LMD experiments are carried out implementing the outcomes of the analytical model, varying laser power and feeding speed. The results depict the feasibility of concept for high area deposition with further flexibility in track width control
Influence of shielding gas flow on the μLMWD of biodegradable Mg alloy and permanent stainless steel for additive manufacturing of biomedical implants
Full text linkWire feedstocks can be potentially used in additive manufacturing of customized biomedical implants. Micro laser metal wire deposition (μLMWD) can provide the dimensional resolution through the use of pulsed wave laser emission with small wire diameters (0.5 mm). Concerning the high reactivity of the biodegradable Mg alloys, the use of a wire feedstock can provide relatively safer option compared to powders. The local shielding of the process environment by an inert gas is of paramount importance for both biodegradable Mg alloys but also permanent implant materials such as stainless steel. In this work, the deposition feasibility via μLMWD of a biodegradable Mg alloy with Dy as the main alloying element (Resoloy) is studied along with a comparison with AISI 316, which has good processability. A shielding chamber was employed with oxygen content measurements during the process in order to reveal the oxygen take up or release during the process. An experimental study was employed to reveal the role of the process atmosphere on the process stability of Resoloy and AISI 316 deposits. Multiple layer deposits of the biodegradable Mg alloy were demonstrated. The results indicate that the highly reactive Mg alloy goes through a continuous oxygen intake and release during the deposition, while stainless steel mainly takes up oxygen from the environment. The deposition of multi-layered Resoloy specimens was proven to be possible to the less amount of surface oxide generated with the global shielding employed
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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