1,721,033 research outputs found
A parallel computing model via pictures in an enriched-categorical context
No full textAn example of internal-valued non parallel computing via graphical representable elements is given
in [1].
We want to use a similar approach to model intrinsically parallel computing, maintaining, at the
same time, analogies with the communicating process approach [2].
It has been shown that a suitable topos of (pre)sheaves can provide a good semantics for communicating
processes whose computations are labeled from an alphabet of elementary moves L (see
e.g. [3]). Alternatively, a semantics for them can be provided by considering an “enrichment” [4] on
a category of trees, obtained from the 2-category L built up from L, using concatenation [5]. The
two approaches are not in opposition, because one can show that, under suitable conditions, a tree is
a presentation of a sheaf over the space defined by its labeling monoid L (the base 2-category) [6].
Nonetheless, this second point of view allows us to consider objects in L as observers labeling computations
as well as particular truth-values in the corresponding topos of sheaves. Another nice feature
of this second approach is that we can vary the nature of these elements, and all the construction will
change parametrically; e. g. L need not be a free meet-semilattice monoid [5].
In the present paper we make a further step and substitute elementary moves by pointed (multidimensional)
pictures considered in [7], concatenated via the overlapping operation. As a consequence
a single pointed (multidimensional) picture, considered as a coding of some data, becomes an elementary
observation/computation move, and a computation will be labeled through a suitable overlapping
of such things. The corresponding truth-values system will be of a great flexibility, exploiting the shape
of the image in the picture as well as its definiteness degree
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
The Theory of Visual Sentences to Formalize Interactive Visual Messages
No full textThis chapter introduces an approach to the theory of visual languages based on the notion of visual sentence as defined by the integration of pictures and descriptions. The chapter proceeds firstly by tracking the history of the ideas that stemmed from the initial IEEE Workshop held at Hiroshima (Japan) during 1984 and then gradually progressing toward the formalisms that build up the theory of visual languages. The theory of visual sentences allows a coherent view of both static and dynamic aspects of human-computer interaction, as well as of the relations between the user and the machine during the interaction
Interactive Knowledge Elicitation for Application Dependent Feature Evaluation Supported by Conditional Attributed Rewriting Systems
No full textVariations 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
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
- …
