1,721,492 research outputs found
Analysis of large diameter pipe pile drivability in tokyo bay using piezocone data
No full textThe piezocone penetration test (CPTU) provides near continuous measurements of three independent parameters: tip resistance (qt), sleeve friction (fs), and penetration pore pressure (u2). The tip resistance and sleeve friction are roughly analogous to pile end bearing resistance (qb) and the shaft resistance (τf) near the pile tip during installation, respectively, while the penetration pore pressure provides an indication of the drainage conditions during cone penetration. However, due to the differences in diameter between a pile and a CPT, as well as the differences in installation method, CPTU parameters (qt and fs) must be modified to assess the values of unit base and shaft resistance (qb and τf) applicable to the static capacity of the pile and the soil resistance to driving (SRD). In this paper, back-analyses of installation records from eight large diameter (1.2 to 1.8m) open ended pipe piles driven through soft clays, silts, and sands at the Tokyo Port Bay Bridge site are conducted using the results of adjacent CPTUs. These analyses provide guidance on evolving methods for interpreting CPTU data to provide predictions of short term SRD, in addition to long term static capacity.</p
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
Back analysis of Tokyo port bay bridge pipe pile load tests using piezocone data
No full textThis paper reports and back-analyses the results of two static load tests on 1.5m diameter instrumented pipe piles, conducted to aid the design of the Tokyo port bay bridge. The site investigation included high quality piezocone testing (CPTU), which is used to back-analyze the pile response in light of recently-developed design methods for axial pile capacity. Local shaft friction (τf) in sands, silts, and lightly overconsolidated clays, as well as unit base resistance (qb) of pipe piles in Tokyo gravel and Edogawa sand are evaluated using CPT qt. A simple expression for shaft resistance, which is an extension of the UWA approach for piles in sand, is shown to provide good predictions for the shaft resistance through the mixed sand, silt and clay layers at this site. The base resistance at a tip settlement of D/10 is a combination of resistance on the pile annulus and the enclosed soil plug. The unit annulus resistance is fully mobilized and comparable to CPT qt at the pile tip. The plug resistance is only 0.2qt,avg at the end of the load test, but steadily increasing, which highlights the conservatism in limiting pipe pile base capacity by a settlement criterion if the structure can tolerate additional movement.</p
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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