1,721,833 research outputs found
Application of time reversal guided waves to field bridge testing for baseline free damage diagnosis
No full textThis research is partially supported by Pennsylvania Infrastructure Technology Alliance (PITA) Program and Pennsylvania Department of Transportation (PennDOT). The first author would like to acknowledge the graduate fellowship program from Samsung Lee Kun Hee Scholarship Foundation in Seoul, Korea. The authors would like to thank Paul Majoris and James Johnson for granting access to the Buffalo Creek Bridge site. The authors also would like to thank Profs. David W. Greve and Irving J. Oppenheim for providing invaluable comments and making the scaled girder specimen available for our study
Estimation of the ocean current velocities from radar altimetry and applications to the North Pacific Ocean
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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
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
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
Multi-parameter experiments and modeling for nitrate sorption to quaternary ammonium-functionalized poly(amidoamine) dendrimers in aqueous solutions
No full text© 2022, Islamic Azad University (IAU).The aim of this study was to investigate nitrate sorption onto quaternary ammonium-functionalized poly(amidoamine) dendrimer generation 2.0 (q-PAMAM-G2). The physicochemical characteristics of the q-PAMAM-G2 were examined using field emission scanning electron microscopy, thermogravimetric analysis, electrophoretic light scattering spectrophotometry, elemental analysis, etc. Single-parameter sorption tests were performed under batch conditions to examine the nitrate sorption characteristics of the q-PAMAM-G2. According to a pH experiment, the q-PAMAM-G2 maintained a relatively stable nitrate sorption capacity at pH 2 to 10. X-ray photoelectron spectrometry analysis indicated a new peak for the NH4NO3 bond after nitrate sorption, confirming nitrate sorption to quaternary ammonium groups on the surface of the q-PAMAM-G2 through anion exchange. The kinetic data were best fit with the pseudo-second-order model, whereas the equilibrium data fitted well with the Langmuir isotherm, suggesting that nitrate sorption onto the q-PAMAM-G2 occurred through chemisorption. Multi-parameter sorption experiments (n = 32) were conducted with three input variables (adsorbent dose, initial nitrate concentration, and solution pH) and one output variable (nitrate removal rate). In response surface methodology (RSM) modeling, a quartic regression model (fourth-order polynomial equation) was developed to predict nitrate sorption onto the q-PAMAM-G2. In the artificial neural network (ANN) modeling, a model with a structure of 3:10:1 was derived to describe the nitrate sorption data. Additional multi-parameter experiments for nitrate sorption onto the q-PAMAM-G2 (n = 8) were conducted to further evaluate the developed models. The developed ANN model (R2 = 0.872) predicted better than did the RSM model (R2 = 0.790) for the additional multi-parameter experimental data.N
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