1,722,110 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
On controlling chaos in a discrete-time Walrasian tatonnement process
No full textThe simple pure exchange model with two individuals and two goods by Day and Pianigiani (1991), extensively analyzed by Day (1994) and taken up again by Mukherjy (1999), is discussed and extended with the purpose of showing that chaos in a discrete tâtonnement process of this kind can be controlled if the auctioneer uses a smooth, nonlinear formulation of the price evolution process such that the price adjustment is a sigmoid-shaped function of the excess demand, with given lower and upper limits. In particular, we show that, given the price adjustment speed and the excess demand function, the auctioneer can (i) stabilize the dynamics, (ii) reduce the complexity of the attractor and (iii) increase the economic significance of the adjustment process by simply acting on the lower and/or upper limits that constrain price dynamics
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
Diachronic Perspectives in Italian Terminology and Terminography
No full textThe paper investigates the consequences of imbalances in the documentation available in leading edge science and technology in English and Italian for the creation of terminology resources. By analysing a corpus of academic papers, instructional texts and popular science texts in nuclear/particle physics and especially patterns of term formation and types and features of definitions, the authors suggest that loss of domain-specific information due to lack of documentation – especially as far as some text types are concerned – can be partly overcome if multilingual term collections combine the wealth and variety of information available in English as the lingua franca of science with information in Italian that meets the requirements of translation of textbooks and popular science texts – the types of documents that are still produced in languages such as Italian
On controlling chaos in a discrete tâtonnement process
Full text linkThe simple pure exchange model with two individuals and two goods by Day and
Pianigiani (1991), extensively analyzed by Day (1994, Ch. 10) and taken up again by
Mukherjy (1999), is discussed and extended with the purpose of showing that chaos
in a discrete tâtonnement process of this kind can be controlled if the auctioneer uses
a smooth, nonlinear formulation of the price evolution process such that the price
adjustment is a sigmoid-shaped function of the excess demand, with given upper and
lower limits. This formulation o¤ers some advantages over previous specifications. In
particular, given the speed of adjustment and the excess demand function, we show
that, acting on the lower and/or upper limits that constrain price dynamics, the
auctioneer can (i) stabilize the dynamics, (ii) reduce the complexity of the attractor
and (iii) increase the economic significance of the adjustment process
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