1,720,955 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
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
Detecting neural currents using magnetic resonance imaging
No full textCurrent methods use blood oxygenation level-dependent contrast to indirectly detect neural
activity but are inaccurate in their localization in space and time. Magnetic resonance imaging
(MRI) has high space and time resolution, but it has not been shown to be feasible for detecting
nerve signals. The action currents in nerves create their own magnetic field, which could
potentially cause a large enough phase shift in the magnetic resonance signal to be detected. The
possibility of direct imaging would benefit neuroscientists in their study of the human brain. In
this thesis, COMSOL Multi physics is used to simulate the displacement of ions in a copper
sulfate solution as a model for the displacement of water molecules around nerves. If the water
molecules experience a sufficient Lorentz force, their shift can be measured using MRI. The
simulations do not conform to the results expected from articles on the same topic, due to errors
and wrong assumptions in the model.Thesis (B.?)Honors Colleg
Spin-torque-driven magnetization dynamics for neuromorphic functionality
No full textSubmission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo termsThe student, Robin Klause, accepted the attached license on 2025-05-08 at 09:00.The student, Robin Klause, submitted this Dissertation for approval on 2025-05-08 at 09:14.This Dissertation was approved for publication on 2025-05-19 at 13:28.DSpace SAF Submission Ingestion Package generated from Vireo submission #22128 on 2025-10-20 at 20:14:40With the ever-increasing demand for computationally demanding tasks and large scale memory, new information processing and storage technology is needed. Spintronics plays a key role in the development of faster, smaller, and more energy efficient technology. In this work, the focus lies on the electrical control of magnetization dynamics through spin-orbit torques and the exploration of their potential for enabling neuromorphic functionality. More specifically, unconventional spin-orbit torques and the coupling of spin-Hall nano-oscillators are explored. First, unconventional spin-orbit torque generation in the non-collinear antiferromagnet and altermagnet MnPt is explored. The thin film growth process is optimized based on the structural characterization, and the electrical transport properties. Spin-torque ferromagnetic-resonance reveals that unconventional spin-orbit torques, resulting from a spin polarization component along the current direction, are generated when current is applied along specific directions with respect to the crystal and magnetic order. Second, unconventional spin-orbit torque generation in CrPt is studied. Spin-torque ferromagnetic-resonance and second harmonic Hall measurements of CrPt/Cu/NiFe heterostructures reveal that unconventional field-like spin-orbit torques are generated in both ferrimagnetic and paramagnetic CrPt films indicating that the magnetic ordering does not play a role in generating unconventional torques. Instead, numerical calculations reveal that the unconventional torques stem from indirect non-local spin-orbit torques and symmetry breaking at the CrPt/Cu interface. Third, micromagnetic simulations show that unconventional spin-orbit torques can be used to generate magnetic droplet solitons in a ferromagnet with perpendicular magnetic anisotropy without applying an in-plane magnetic field. Due to the non-local injection of spin-orbit torques, which differs from the typical spin-valve geometry, multiple magnetic droplets can be generated and annihilated using specific current pulses. Last, Pt/NiFe spin-Hall nano-oscillators are fabricated on Si substrate. Injection-locking of the oscillations to an {\em rf} signal reveal that direct electrical coupling of two oscillators is unfeasible due to the low power generation of a spin-Hall nano-oscillator. However, the frequency behavior of two connected oscillators can be tuned using two voltage sources. In addition, a fabrication process for Pt/NiFe oscillators on top of an YFeO film that were grown on GdGaO is developed. This is non-trivial as several challenges need to be overcome that are due to the electrically insulating and poor thermally conducting film and substrate
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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