1,721,006 research outputs found
3D Assessment of Lymph Nodes vs. RECIST 1.1.
No full textIn today's clinical practice, the size of lymph nodes is assessed by measuring the long and the short axis in the axial plane. This study compares this approach with three-dimensional (3D) assessment.For a representative set of 49 lymph nodes, the axes in the axial plane have been measured and a 3D model has been created manually. Based on the 3D model, the real axial long and short axis as well as the three 3D axes and the volume have been computed and compared to the measured axial axes.The inter-observer variability is around 10\% for all measured lengths and almost 16\% for the computed volume. The average relative error of the measured long (short) axial axis is 9.73\% (24.57\%) to the computed axial axis and 25.05\% (19.97\%) to the computed 3D axis, respectively. The product of the axial long axis and the square of the axial short axis provides best correlation to the volume.This study confirms Response Evaluation Criteria In Solid Tumours 1.1 that measuring the short axis is more robust than measuring the long axis because of less impact of the node's spatial orientation. Nonetheless it is shown that considering both axes is a better prognostic factor for the volume than measuring the short axis only
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
Rigide Registrierung von 3D anatomischen MRI und 2D biochemischen MRSI Daten
No full textDie Magnetresonanzspektroskopie ist eine junge Disziplin, die viele neue Möglichkeiten bei der medizinischen Diagnostik und der Therapie eröffnet. Sie ermöglicht eine nichtinvasive Bestimmung von physiologischen und biochemischen Parametern des Gewebes. Um anhand dieser Parameter aussagekräftige Schlussfolgerungen ziehen zu können, müssen sie mit anatomischen MRT-Informationen kombiniert werden. Dazu ist eine Registrierung von anatomischen und spektroskopischen Daten erforderlich. Allerdings gibt es dafür noch keine standardisierte Methode. Im Rahmen dieser Masterarbeit soll eine auf geometrischen Berechnungen und Transformationen basierende Methode zur automatischen Registrierung von anatomischen und spektroskopischen Datensätzen entwickelt werden. Dabei sollen die spektroskopischen Datensätze in ein geeignetes Bildformat umgewandelt werden. Die entwickelte Methode soll durch eine in vivo Untersuchung ausgewertet werden.The magnetic resonance spectroscopy is a young discipline which establishes a lot of new potentialities in medical diagnostics and therapy. It enables a non-invasive determination of physiological and biochemical tissue parameters. In order to draw the diagnostically conclusive consequences on the basis of these parameters, they have to be combined with anatomical MRI information. For this purpose it is necessary to register anatomical and spectroscopic data. However there is no standard method for this yet. Within the scope of this master thesis, an automatic method for the registration of anatomical and spectroscopic data sets, based on geometrical calculations and transformations, shall be developed. In the process, the spectroscopic data sets shall be converted into an appropriate image format. The developed method shall be evaluated by an in vivo study
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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