1,721,019 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
Demonstration of a Novel Modular Neutrino Detector
Full text linkThe Deep Underground Neutrino Experiment (DUNE) is designed to perform precision measurements of neutrino oscillations by combining a high-intensity, broad-spectrum neutrino beam with large-mass, highly granular detectors. A critical requirement for achieving this goal is the accurate characterisation of the unoscillated neutrino beam at a near detector site, located close to the beam source, before the neutrinos propagate over a distance of 1500m to a far detector complex, where the oscillated beam is measured. The near site will be instrumented with a modular detector based on liquid argon time projection chamber (LArTPC) technology. The modular design of this detector has proven advantageous for operation in the high-rate environment of the intense neutrino flux at the DUNE near detector. In this thesis, it is shown how the optical segmentation imposed by the detector modularity enhances the ability to localise scintillation light and facilitates efficient matching between the light and charge signals produced by neutrino interactions, an essential capability for disentangling overlapping events within a single beam spill. To demonstrate and validate the modular approach, the 2x2 Demonstrator, which consists of four fully instrumented LArTPC modules, was developed as part of this thesis. The detector was operated in the Neutrinos at the Main Injector (NuMI) beam at the Fermi National Accelerator Laboratory and successfully integrated light and charge detection, cryogenic infrastructure, timing systems, and data acquisition under realistic beam conditions. As part of this work, a comprehensive light readout system was developed and implemented as a core component of the 2×2 Demonstrator, including the design and production of light detectors, the establishment of quality control procedures, the integration of an in-situ calibration system, and the implementation of a fully integrated run control. Performance measurements of the 2x2 Demonstrator show a photon detection efficiency of (0.19 ± 0.02) % and (0.63 ± 0.13) % for the deployed ArCLight and LCM light detection modules, respectively. Using timing information extracted from scintillation light data, the substructure of the NuMI beam spills was resolved and an interaction timing resolution of less than 4 ns was demonstrated
Development and Characterisation of a Novel Light Detector: ArCLight
No full textFuture neutrino experiments are focusing on precise measurements of the neutrino oscillation parameters. The discovery of a CP violation in the context of the neutrino oscillation would help to explain the matter-antimatter asymmetry in the universe. For higher sensitivity experiments novel detector technologies are required. The modular Liquid Argon Time Projection Chamber detector design developed by the ArgonCube collaboration addresses the challenges of the intense neutrino beams used in future long baseline experiments. The detector design is driven by the requirements for the Near Detector of the Deep Underground Neutrino Experiment. New compact light and charge readout technologies are needed to fit the modular structure. In this thesis, a novel dielectric light detection system, called ArCLight, is developed. Based on an existing concept, the performance of ArCLight is optimised through applying multiple design changes. In particular, the existing coating of a wavelength shifting material is replaced by a vacuum evaporation coating. The performance of ArCLight is characterised by measuring the Photon Detection Efficiency (PDE) and the spatial resolution. The new wavelength shifting coating has led to an increase of the overall PDE by about a factor two. The PDE of the final version was measured to be (0.2055 ± 0.0070) %
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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