1,721,054 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
A Specification Theory of Real-Time Processes
No full textThis paper presents an assume-guarantee specification theory for modular synthesis and verification of real-time processes with critical timing constraints. Four operations - conjunction, disjunction, parallel and quotient - are defined over specifications, drawing inspirations from classic specification theories like refinement calculus. We show that a (pre-)congruence characterised by a trace-based semantics captures exactly the notion of substitutivity andrefinement between specifications
Variations on the Author
Get PDF“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
A polynomial-time algorithm for deciding bisimulation equivalence of normed Basic Parallel Processes
No full textA polynomial-time algorithm is presented for deciding bisimulation equivalence of so-called Basic Parallel Processes: multisets of elementary processes combined by a commutative parallel-composition operator. Keywords. Design and analysis of algorithms, Theory of concurrent systems, Formal languages, Process algebra. The first author is currently visiting the Department of Computer Science, University of Edinburgh. y The second author is a Nuffield Foundation Science Research Fellow, and is supported in part by grant GR/F 90363 of the UK Science and Engineering Research Council, and by Esprit Working Group No. 7097, "RAND." z The third author is supported by Esprit Basic Research Action No. 7166, "CONCUR2." 1 Discussion Consider a collection (actually a multiset) of "elementary processes," each of a finite number of different kinds. At any instant, one of the elementary processes may spontaneously perform one of a finite number of "actions," appropriate to its kind, and in so..
Railway modelling in CSP||B: the double junction case study
No full textThis paper reports on recent work in verifying railway systems through CSP||B modelling and analysis. Our motivation is to develop a modelling and verification approach accessible to railway engineers: it is vital that they can validate the models and verification conditions, and - in the case of design errors - obtain comprehendable feedback. In this paper we run through a full production cycle on a real double junction case study, supplied by our industrial partner, who contributed at every stage. As our formalization is, by design, near to their way of thinking, they are comfortable with it and trust it. Without putting much effort on optimization for verification, the scale of the models analyzed is comparable with the work of other groups
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
A National Engagement Model for Developing Computer Science Education in Wales
Get PDFComputer science education in the United Kingdom has undergone substantial scrutiny, and in England a new computing curriculum has just been introduced. However, in Wales - a devolved nation within the UK - political, geographical and socio-technical issues have hindered any substantive educational policy or curriculum reform for computer science over the past ten years. In this paper we present the activities of Technocamps, a university-based schools outreach programme founded in 2003 and its wider impact on computer science education and teachers in Wales. Furthermore, with imminent curriculum reform, we frame the wider opportunity for sustainably embedding both high-value digital competencies and computer science education - as well as changing the wider public perception and importance of computer science - as a prospective replicable case study of a national engagement model for countries with similar aspirations of becoming digitally confident and capable nations
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