1,721,092 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
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
Logical analysis
No full textBefore that a real architecture of system could be defined, by selecting some suitable components, available on the market, it is suggested to describe the Logical architecture of the system, to investigate the most promising solutions available in terms of exploitable technology. This leads to perform a Logical Analysis, as is herein described. Relations between Functional and Logical Analyses are investigated. Examples are exploited to show some properties of this analysis. At the end of chapter, the main items of the Logical Analysis are resumed
Physical analysis
No full textThis main activity of engineering is described and analyzed within the frame of the whole product development and in connection with the Functional and Logical Analysis. The two test cases are explored to describe different examples of physical modeling, considering the dynamic behavior of a rotor, actively suspended and the performance in de-icing activity of the on-board system of the commercial aircraft selected for this example. Some numerical methods are even described as they are applied in the two proposed test cases
Functional analysis
No full textThe next step of Functional Analysis is herein investigated. The existing relation between Operational and Functional Analyses is first defined. The implementation of the Functional Analysis is then performed, through the SysML. How the traceability and the requirements allocation are assured is shown. The system behavior is fully analyzed. The functional architecture is then derived, for the two test cases. Finally, the main items of the Functional Analysis are resumed
System verification and validation (V&V)
No full textA preliminary overview on the connection between Application Lifecycle Management and Product Lifecycle Management is proposed, by introducing the contents and the strategies of the Verification and Validation activities. The chapter should allow the Reader distinguishing the two activities and even the tools and the goals related. A comparison between the typical approaches applied in Software and Hardware Engineering, respectively, is briefly deployed. A preliminary relation with the RAMS analysis, dealing with Reliability, Availability, Maintainability and Safety, is discussed, especially in the two test cases
The systems engineering
No full textMany definitions of the Systems Engineering are proposed, and analyzing some differences between them help to highlight contents and open issues, as they are described in this chapter. Nevertheless, a short historical outline could be helpful in appreciating some characteristics of this methodology, which are even more detailed by a wide literature, herein briefly described. Furthermore, an overview of technical standards dealing with the Systems Engineering is added, to define a roadmap for a deeper education in this field
Systems, customer needs and requirements
No full textA preliminary and relevant step of the whole process includes a complete collection of customer needs and a suitable elicitation of requirements. This activity is never trivial and requires to be suitably formalized. This is done by resorting to the test cases of this handbook. In the meanwhile, the role of stakeholders is even investigated and defined. Requirements are then defined, classified and categorized for a better implementation of the MBSE. A direct implementation of requirements analysis is performed for the two examples
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