1,721,116 research outputs found
Semantic Techniques for Representation and Identification of Part Families
No full textThe paper deals with the automatic feature recognition of workpieces and families formation. To generate part families, the used approach utilizes a frame based representation system both for data and for features. A clustering method is used to toke into account the morphology, the dimensions as well as the manufacturing sequences of parts. Being the procedure a self learning one, the introduction of new parts into the families is relatively simple
A Calculation Program for Deep-Drawing Forms
No full textA program for personal computer in Basic Language calculates the dimensions of the blank of the subsequent forms of a steel metal sheet used to obtain, by deep drawing, a piece with final rectangular plant. The calculation is followed by the plotting of the plant views of all the successive forms involved. The Authors are indebted to ROMANOWSKI's work, from which the procedure is drawn, and in particular for basic assumptions regarding the admissible drawing ratios and the algorithms to define the geometrical features of the forms. On the other hand they have developed a method of successive approximations, which is incorporated in the program, to minimize the number of intermediate forms and to optimize their dimensions. The program puts itself as a first step towards a more general handling of the proble
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
- …
