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Toward the observation of a liquid-liquid phase transition in patchy origami tetrahedra: a numerical study
No full textWe evaluate the phase diagram of a model of tetrameric particles where
the arms of the tetrahedra are made by six hard cylinders. An
interacting site is present on each one of the four vertices allowing
the particles to form a bonded network. These model particles provide a
coarse-grained but realistic representation of recently synthesised DNA
origami tetrahedra. We show that the resulting network is sufficiently
empty to allow for partial interpenetration and it is sufficiently
flexible to avoid crystallisation (at least on the numerical time
scale), satisfying both criteria requested for the observation of a
liquid-liquid critical point in tetrahedrally coordinated particles.
Grand-canonical simulations provide evidence that, in silico, the model
is indeed characterised, in addition to the gas-liquid transition, by a
transition between two distinct liquid phases. Our results suggest that
an experimental observation of a liquid-liquid transition in a colloidal
system can be achieved in the near future
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
Microgel at interface
No full textThe folder contains images videos and gifs of simulations of microgels at an interfac
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
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