1,720,970 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
No full text“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
No full textWe 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
No full textWe 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
Probing compact objects with gravitational waves: Bounding dark charges on black holes and exploring gravitomagnetic tides on neutron stars
No full textIn 2017, the first gravitational wave signal from a binary neutron star merger, GW170817, was detected by both Advanced LIGO and Advanced Virgo. From this merger, a gamma ray burst was detected by the Fermi Gamma-ray Space Telescope and the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) spacecraft which initiated a new era of multi-messenger astronomy. Neutron star matter Neutron stars are the most densest objects in our universe which are formed in su- pernova explosions. This makes neutron stars ideal astrophysical laboratories for testing theories of dense matter physics. A typical neutron star has a mass of the order of 1.4 solar masses and a radius of 12 km. The matter inside a neutron star is characterised by the relation between pressure and density, known as the neutron star equation of state. Equation of states of neutron stars are modelled by various theories in nuclear physics and quantum chromodynamics. A neutron star in a binary system is deformed due to tidal forces of its companion, either a neutron star or a black hole. This effect is similar to what happens here on Earth when the moon’s gravity raises the ocean tides. Internal oscillations of the neutron star arise when the companion’s tidal force varies at a frequency close to the star’s characteristic frequency. This is like a bridge oscillating when a band marches at a pace matching its frequency. The amount of tidal deformation and the characteristic frequency depend on the equation of state of the neutron star matter. Any tidal response of the star leaves a distinct imprint on the gravitational waves emitted by the binary. Thus, gravitational waves will reveal unique information about the exotic interior of the neutron stars. There are two types of tidal effects: gravitoelectic and gravitomagnetic. Gravitoelectic are leading order tidal effects while gravitomagnetic are next to leading order tidal effects. In this thesis, we modelled the gravitomagnetic tides for a binary neutron stars and their effect on the gravitational waves signal. We used this model to understand the effect of gravitomagnetic tides on measuring the equation of state of neutron stars using third-generation gravitational wave observatories such as Einstein Telescope and Cosmic Explorer. Dark Charges Most of the matter in the Universe is made of dark matter which cannot be directly observed. It is called ”dark” because it does not interact with light or other forms of electromagnetic radiation. Its presence can be inferred from its gravitational effects on visible matter, such as galaxies and clusters of galaxies. Over the years, many candidates of dark matter have been proposed, one of them being dark charges. These are reminiscent of electrons, but their charge-to-mass ratio is smaller. They can accumulate on binary black holes through various astrophysical processes. In this thesis, we explored the possibility of detecting dark charges using gravitational waves from binary black holes
Learnings - an educational experience in India
No full textMitschnitt eines Vortrags, der am 06.02.2003 am Südasien-Institut der Universität Heidelberg gehalten wurde
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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