1,722,740 research outputs found
franciscaconcha/2019MNRAS.490..5678: Code for paper 2019MNRAS.490..5678
No full textCode to run the simulations and generate figures of the paper: "External photoevaporation of circumstellar disks constrains the timescale for planet formation" (2019MNRAS.490..5678, https://doi.org/10.1093/mnras/stz2973
[Kentucky & Tennessee Ry., Engine Drawing Card, Sketch No. 5678]
No full textThis engine drawing card was created for Kentucky & Tennessee Railway, Class 10-34 1/4 D. Section N-10 1/4 D. Sketch 5678. Copy Spec. B5901
De connectionistische mode : Symbolische en sybsymbolische modellen van het menselijk gedrag
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5678.pdf (Publisher’s version ) (Open Access
TOI-5678 b: A 48-day transiting Neptune-mass planet characterized with CHEOPS and HARPS
Get PDFA large sample of long-period giant planets has been discovered thanks to
long-term radial velocity surveys, but only a few dozen of these planets have a
precise radius measurement. Transiting gas giants are crucial targets for the
study of atmospheric composition across a wide range of equilibrium
temperatures and for shedding light on the formation and evolution of planetary
systems. Indeed, compared to hot Jupiters, the atmospheric properties and
orbital parameters of cooler gas giants are unaltered by intense stellar
irradiation and tidal effects. We identify long-period planets in the
Transiting Exoplanet Survey Satellite (TESS) data as duo-transit events. To
solve the orbital periods of TESS duo-transit candidates, we use the
CHaracterising ExOPlanet Satellite (CHEOPS) to observe the highest-probability
period aliases in order to discard or confirm a transit event at a given
period. We also collect spectroscopic observations with CORALIE and HARPS in
order to confirm the planetary nature and measure the mass of the candidates.
We report the discovery of a warm transiting Neptune-mass planet orbiting
TOI-5678. After four non-detections corresponding to possible periods, CHEOPS
detected a transit event matching a unique period alias. Joint modeling reveals
that TOI-5678 hosts a 47.73 day period planet. TOI-5678 b has a mass of 20
(+-4) Me and a radius of 4.91 (+-0.08 Re) . Using interior structure modeling,
we find that TOI-5678 b is composed of a low-mass core surrounded by a large
H/He layer with a mass of 3.2 (+1.7, -1.3) Me. TOI-5678 b is part of a growing
sample of well-characterized transiting gas giants receiving moderate amounts
of stellar insolation (11 Se). Precise density measurement gives us insight
into their interior composition, and the objects orbiting bright stars are
suitable targets to study the atmospheric composition of cooler gas giants.Comment: 17 pages, 10 figures, accepted to A&
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
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