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Electromagnetic shielding effectiveness of fiber-reinforced mortar coated with magnetic paint: Numerical approach
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Long-term Behavior under Axial Service Loads of Circular Columns Made from Concrete Filled Steel Tubes.
No full textThis paper presents analytical studies on the long-term behaviour of circular concrete filled steel tubular (CFT) columns under central axial loading. Two loading cases are considered in this study: (1) a load applied only at the inner core concrete of a CFT column; and (2) a load applied simultaneously on both the inner concrete and the steel tube. Analysis methods are formulated based on compatibility, equilibrium conditions, and a number of assumptions for the two loading cases. Bond behaviour between the inner concrete and the steel tube along with confinement created by the steel casing are considered in the formulation. Experiments were performed for CFT column specimens under the aforementioned two loading cases to verify analysis methods. Analysis results exhibit good agreement with test results, and therefore the validity of the assumptions used in the formulation and the accuracy of analysis methods is proven. Furthermore, the following features of the long-term behaviour of circular CFT columns under these loading cases are revealed by test and analysis results. In the case of loading at the inner concrete of the CFT column, the strains of both the concrete and steel tube are non-linearly distributed along the longitudinal axis of the CFT column because of the bond stress and the confinement effect. Slip occurs and becomes larger with time due to the difference between the strain distributions of the concrete and the steel tube, which also increases with time. In the case of loading on the entire section of the CFT column, the strains of both the concrete and steel tube are uniformly distributed along the longitudinal axis of the column. As loading time increases, however the stress acting on the concrete section decreases, while the stress of the steel tube section increases. The confinement effect of the concrete does not appear at initial loading or in long-term deformation
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
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