1,721,075 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
Marcher dans les rues de Strasbourg. Le piéton réflexif et l'archéolgie urbaine
No full textLes villes sont les lieux où l’histoire collective et les histoires singulières qui ont croisé ou accom-pagné celle-ci se sont faites pierre, architecture, édifices, rues et même vides urbains. Elles sont « le livre de pierre » qu’évoquait Victor Hugo, dans lequel on peut lire les destins tant des vainqueurs que des vaincus, des nobles que des roturiers, des lettrés que des analphabètes. Il nous semble, sans vouloir porter préjudice au poète, que l’on peut surtout les voir comme un extraordinaire palimp-seste maintes fois réécrit, où chaque effacement, loin d’être radical, laisse transparaître ce qui l’a précédé. . Il la découvre en creusant sous la surface et, ce faisant, se découvre et se comprend aussi lui-même. Il existe une différence fondamentale entre l’approche distraite du touriste enclin à isoler les détails, dont le regard faussé ne cherche dans la ville que ce qu’il s’attend à trouver en traversant un milieu urbain composé de fragments, et l’approche du promeneur qui l’observe avec des yeux neufs, capte les détails mais sait les mettre en relation avec le tout. En marchant et en regardant les lieux familiers avec d’autres yeux, comme Proust l’a par la suite suggéré, le piéton réflexif se plonge dans les émotions de la ville et les redécouvre le long des rues, où une identité s’est sédimentée au fil du temps ; il en retrouve les traces dans le palimpseste urbain, il s’y attarde, les fait siennes et recouvre la capacité de s’émouvoir même face à ce qui lui est familier, déjà connu ; ce faisant, il redéfinit et reconstruit l’espace urbain.
Strasbourg, pour être comprise, a besoin de ces yeux neufs
Advances in Catalytic Routes for the Homogeneous Green Conversion of the Bio-Based Platform 5-Hydroxymethylfurfural
Full text link5-Hydroxymethylfufural (HMF) is an intriguing platform molecule that can be obtained from biomasses and that can lead to the production of a wide range of products, intermediates, or monomers. The presence of different moieties in HMF (hydroxy, aldehyde, furan ring) allows to carry out different transformations such as selective oxidations and hydrogenations, reductive aminations, etherifications, decarbonylations, and acetalizations. This is a great chance in a biorefinery perspective but requires the development of active and highly selective catalysts. In this view, homogeneous catalysis can lead to efficient conversion of HMF at mild reaction conditions. This Review discussed the recent achievements in homogeneous catalysts development and application to HMF transformations. The effects of metal nature, ligands, solvents, and reaction conditions were reported and critically reviewed. Current issues and future chances have been presented to drive future studies toward more efficient and scalable processes
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
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
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