1,720,999 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
Behavior of Extended Shear Tabs in Stiffened Beam-to-Column Web Connections
No full textSingle-plate connections, also called shear tabs, are an economical and efficient way to transfer load from one member to another, and are often found in steel-frame buildings. One type of shear tab is the extended shear tab, and it is unique in that the eccentricity of the bolt centroid to the weld centroid is greater than the 3½” allowed for standard shear tabs. This larger eccentricity develops a larger moment in the plate, sometimes requiring a thicker plate. There are instances, however, when this extra material cost is offset by other savings, and the use of extended shear tabs is economical. One such instance is when a beam or girder frames into the web (weak axis) of a column that is supporting a moment connection on its flanges (strong axis), as in a rigid frame.
According to the AISC Manual of Steel Construction 3rd ed., an official design procedure does not exist for extended shear tabs. It is the goal of this Master’s Thesis to investigate different extended shear tabs in the aforementioned framing situation to determine their strength capabilities. A design procedure will be proposed and various shear tab connections will be designed using the proposed procedure. Full-scale testing of the connections will be undertaken in the laboratory to accrue experimental data and the connections will be simulated for analytical analysis using finite element models. The proposed procedure assumes a reduced eccentricity due to the stiffening of the continuity plates. The connection strength is contingent upon the capacity of the continuity plates, which must meet minimum requirements. The test results supported the hypothesis, but the results of the finite element models were insufficient for making any definitive recommendations
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
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Damage repair of bridge superstructures using bonded composite patching
No full textMany of the steel and concrete bridges built in the 20th century are reaching the end of their planned service life in the early part of the new century. Corrosion and fatigue fracture of steel, and cracking, spalling, or delamination of concrete are common deteriorations due to harsh environments. The structural deficiency of these bridges is further aggravated by heavier and faster traffic loads than what they were originally designed. Effective life management of the large number of deficient and/or obsolete bridges with limited budgets requires post-strengthening, retrofitting, or repair, with minimum interference of traffic and cost. In some cases, localized repair can extend the life for a period of time using a repair method based on bonded fiber-reinforced polymers (FRP) patches for both steel and concrete bridges. This repair solution may prove effective for excessive flexural and shear cracks in concrete beams, and section loss of steel beams.This thesis is concerned with predicting the performance of such patch repaired beams using mechanistic modeling and experimental testing. Steel, reinforced concrete, and prestressed concrete beams test beams are utilized and the predicted response values are compared and validated
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