1,721,048 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
Molecular dynamics of -carotene in solution measured by subpicosecond Transient Optical Kerr Effect
No full textAppropriate 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
Optimization procedure of an overboarding chute with standards, mechanical and numerical considerations
No full textNowadays, in order to be competitive on the market, it is fundamental to design optimized devices. This is especially true in the Offshore sector where the product’s weight has a material influence on all operations. Reducing this parameter implies a significant decrease in the project’s cost. This paper proposes the study of the kinematic rotation of a prototype machine required to lay down an umbilical system, needed to provide the vital supply (electricity and fiber optic) from platforms or topside vessel to subsea oil and gas furniture.
In this paper, it will be proposed a solution for the delivery of a 600 mm external diameter umbilical product. In the studied case, the Client asked to have a cable that partially floats once it reaches the sea water showing incredible benefits such as the possibility to be replaced and small umbilical deflections due to a catenary effect reduction. Due to this singular request, the proposed prototype machine – characterized by the rotation of an articulated parallelogram, activated by two main pistons – ensures safety operation and integrity of the laid umbilical.
Starting from an accurate structural analysis, a reliable model has been created and a first solution of the forces distribution along the chute elements has been found, highlighting some significant points (static configurations during a dynamic evolution). During the piston design phase, some limitations of current DNV standards (when dealing with offshore technologies) have been highlighted. To investigate this peculiar phenomenon several results obtained by different numerical approaches are proposed.
The present machine could be even applied in the renewable energy field, for connecting wind turbines in the wind farm’s hub and then to carry the produced energy on shore. This analysis results in a 15% machine weight reduction with respect to the initial design. Such simulation provided a practical design tool for the Offshore market
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