1,721,589 research outputs found
Bipyridine functionalized molecular clips : Self-assembly of their ruthenium complexes in water
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14253.pdf (Publisher’s version ) (Closed access
Tolerance specification in Reverse Engineering following ISO 14253-1:2013.
No full textDesde la publicación de la ISO 14253-1 en 2013, hemos trabajado en un procedimiento de medición fiable aplicable en Ingeniería Inversa. En un principio, parece sencillo medir una pieza y estimar su medida con sus incertidumbres, pero habitualmente no se considera la asignación de tolerancias dimensionales ni geométricas.
En otros casos, se considera erróneamente la incertidumbre como la tolerancia del proceso de fabricación. En este caso no se sigue la norma ISO.
Nosotros proponemos un procedimiento validado, sencillo y práctico para la Industria, de acuerdo con los requisitos de dicha norma para definir completamente las dimensiones y tolerancias de cualquier pieza en ingeniería inversa.Since the publication of the ISO 14253-1 in 2013 [1]., we have worked in the development of a reliable measurement procedure in reverse engineering. In the beginning, it may seem to be easy to measure a part and to get the estimated value of the sizes and its uncertainties, but several times the dimensional tolerance is not considered, and geometrical tolerances are passed over (unattended).
In other cases, the uncertainty is considered to be the tolerance for the manufacturing process. If it is considered that way, that does not fulfill the recommended practice of the ISO 14253-1:2013.
We propose here a tested procedure, simple and practical for the Industry, in accordance with the requirements of the ISO 14253-1:2013 for fully define the sizes and tolerances of any workpiece in reverse engineering..info:eu-repo/semantics/draf
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
Avaliação dos processos de medição na indústria, baseada no impacto econômico da operação de controle geométrico
Full text linkDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico.Em grande parte das peças produzidas na atualidade, a possibilidade de assegurar sua funcionalidade, aparência e confiabilidade estão relacionados com requisitos geométricos. Dessa forma, para assegurar tal conformidade geométrica, devem conjugar adequadamente condições de projeto geométrico, processo de fabricação e o processo de medição ou inspeção. Tipicamente estas três são tratadas por separado, sendo que a especificação do processo de medição não influência na determinação tanto do projeto quanto da fabricação. Neste trabalho propõe-se uma metodologia para avaliar os processo de medição de forma integral e quantitativa. Ou seja, considerando todas as variáveis de projeto, fabricação e inspeção num só equacionamento que permita determinar, para cada possível alternativa, o custo total da qualidade associado. Dessa forma pode-se comparar em termos objetivos qual é a melhor opção, no só de processo de medição quanto de processo de fabricação e quanto de projeto geométrico. Para verificar o desempenho prático da metodologia proposta, foram realizados estudos de caso. Estes estudos permitiram determinar a real aplicação da metodologia proposta, e identificar aquelas situações onde sua aplicação tem maior aproveitamento. Dado que, embora a metodologia seja realmente robusta, tal condição exige cálculos nem tão simples, especialmente para empresas de pequeno e médio porte
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
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