1,721,050 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
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
Developing a Platform to Analyze the Dependence of Radiomic Features on Different CT Imaging Parameters
No full textPurpose: To develop a framework to quantify the impact of different CT imaging parameters on the variations of radiomic features and to investigate the effectiveness of different image processing methods on the reduction of radiomic feature variations.Method: A publicly available CT image dataset (Credence Cartridge Radiomics Phantom CT scans) acquired on a phantom consisting of different texture materials was used in this study. 251 scans were divided into 5 groups. In each group, only one of the following imaging parameters changed: slice thickness, pixel size, convolutional kernel, exposure (mAs), and scanner model. 92 radiomic features from intensity, intensity histogram, GLCM, GLRLM, and GLSZM groups were extracted from the same region of interest (ROI) in each scan using an in-house application. The coefficient of variation (CV) was used to measure the variation of radiomic features due to each imaging parameter. Three preprocessing methods, resampling, gray level rebinning, and image filtering were tested for their effectiveness in reducing feature variations.Result: The proposed workflow identified individual features and groups of features with high variation and showed responses of each feature to different image preprocessing methods. The convolutional kernel of scanners caused the largest variations in calculated features in general, while exposure had low influence on features in all categories. GLSZM features showed higher sensitivity to pixel size and slice thickness due to the dependence of number of voxels in a gray level zone to the voxel size. Image preprocessing did not improve feature robustness in most cases. Conclusion: This study demonstrated the ability to reveal the relationships between radiomic feature variations, imaging parameters, and image correction methods. The proposed workflow can be used to study the feature robustness prior to the application of any radiomic features in multi-institutional studies.</p
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
A Secure Binding Update Protocol Providing Mutual Authentication In Nested Mobile Network
No full textNetwork Mobility (NEMO) techniques can support Internet access in public transportation such as airplane, electric railway, car, etc. Network Mobility is based on mobile IPv6 techniques and standard. Network Mobility has fundamental and inefficient so-called triangular routing problem that inherited mobile IPv6, and pinball routing problem in nested environment. Many schemes are already proposed to solve triangular routing problem and pinball routing problem. In this paper, we investigate routing problem, analyze contents of existing schemes, and propose a new practical and secure authenticated binding update protocol to solve triangular routing problem and pinball routing problem
- …
