1,720,970 research outputs found
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
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
The Virtual Surgical Pelvis: Anatomy Visualization for Education and Surgical Planning
No full textThis thesis deals with visualizing anatomical data for medical education and surgical planning purposes. To this end, we have developed a detailed virtual atlas, the Virtual Surgical Pelvis (VSP),which unifies surgically relevant knowledge on pelvic anatomy. We provide methods to share the knowledge contained in the VSP for educational purposes, and to visualize the VSP in the context of individual patients for pre-operative planning purposes.Chapter 2 deals with a representation developed to unify spatial and non-spatialanatomical knowledge. Via this representation, it is possible to store, access and visualize these heterogeneous datasets through a shared coordinate system. This allows us to construct the VSP atlas, a process which we describe in detail in Chapter 3, where we also detail the application potential of the VSP. We present several examples of the VSP mapped to clinical pre-operative MRI scans, as examples of how the VSP can be used to enrich clinical data with surgically relevant information that is not available from the scans themselves.To share the VSP for educational purposes, we present an online tool, the Online Anatomical Human (OAH) in Chapter 4. OAH runs directly in the browser and can be used to explore the complex relation between 2D and 3D anatomy. Furthermore, annotations can be added directly on the 3D structures for quizzing purposes, or to enrich the VSP further with annotations performed by experts. The OAH was successfully deployed in aMassiveOpenOnline Course (MOOC), where thousands of studentsworldwide used the application to study pelvic anatomy.While the VSP is based on multiple datasets, it does not include all potential topological anatomical variations in branching structures such as vessels and nerves. Illustrations and text are traditionally used by medical specialists to study these variations, but it is difficult to compare complex variations in such illustrations. Therefore, in Chapter 5 we present an interactive visualization application for anatomical variations, which allows the user to compare and explore variations of branching structures interactively for educational purposes. With methods inspired by graph theory, users can intuitively select groups of variations, based on a similarity measure, and compare local differences.In Chapter 6, we present a state-of-the-art report on multimodal medical visualization. We describe the basics of medical image acquisition, and the clinical workflow for dealing with such data. We discuss suitable rendering and visualization techniques appropriate for rendering multiple modalities. The core contribution of this work is a taxonomy based on the multimodal medical visualization applications so far, the visualization techniques they employ, and the medical domain context. Additionally, we provide an outlook on open problems and potential future research directions.To make the VSP patient-specific and to enrich the VSP with more datasets, registration is needed. Unfortunately, current registration software is often difficult to use for non-medical-imaging-experts. In Chapter 7 we present a new registration application, RegistrationShop, that allows user to register 3D medical image datasets based on 3D visualizations and simple interactive transformation tools. Based on real-time visual feedback via comparative visualization techniques, users can inspect the current registration result and iteratively improve the alignment. Besides basic interactive transformation tools, we propose a novel way of placing corresponding landmark-pairs in 3D volumes.After combining the VSP atlas with patient-specific pre-operative MRI scans, we visualize the results in an interactive application for surgical planning aimed at pelvic oncological procedures, entitled PelVis, which is described in Chapter 8. We present visualization methods to represent context, target, and risk structures for surgical planning of the Total Mesorectal Excision (TME) procedure. We employ distance-based and occlusion management techniques to represent the patient-specific pathology and anatomy. Furthermore, we visualize the confidence in the registration outcome in relation to the distance of the target structure to the risk zones.The research described in this thesis was supported by the Dutch Technology Foundation STW via project 10903: “High-definition Atlas-based surgical planning for Pelvic Surgery”
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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