bluuebunny/crossref_metadata_2025_split huggingface dataset:
La equidad de género en la educación intercultural del nivel superior: una mirada hacia el respeto de los derechos humanos de las mujeres indígenas y afrodescendientes
Authors: López Recinos Nolvia Verónica 
Published: December 2019

El presente artículo aborda el tema de la equidad de género desde una mirada del respeto a los derechos humanos de las personas que pertenecen a la comunidad educativa intercultural del nivel superior. A través de una revisión bibliográfica de diferentes estudios escritos sobre el tema, se toma como referencia la colonialidad del poder desde la interseccionalidad raza/género de María Lugones con el fin de poder explicar el por qué históricamente se dan las diferentes formas de exclusión, discriminación e inequidad hacia las mujeres indígenas y afrodescendientes.
Este trabajo evidencia la brecha que existe entre el acceso, la permanencia y el egreso en las Instituciones del Nivel Superior de indígenas y afrodescendientes, e igualmente, explica las situaciones de desventaja en cuanto a la pertinencia y estrategias pedagógicas, como también el uso de las Tecnologías de la Información (TICs) en los diferentes espacios educativos en los lugares de origen. También se asienta una mirada crítica ante las desigualdades en los espacios educativos del nivel superior para así exigir la creación de políticas educativas que tengan como prioridad asegurar la profesionalización.
Physical Characterization of the 2017 December Outburst of the Centaur 174P/Echeclus
Authors: Kareta Theodore , Sharkey Benjamin , Noonan John , Volk Kat , Reddy Vishnu , Harris Walter , Miles Richard 
Published: December 2019

Abstract
The Centaurs are the small solar system bodies intermediate between the active inner solar system Jupiter family comets and their inactive progenitors in the trans-Neptunian region. Among the fraction of Centaurs which show comet-like activity, 174P/Echeclus is best known for its massive 2005 outburst in which a large apparently active fragment was ejected above the escape velocity from the primary nucleus. We present visible imaging and near-infrared spectroscopy of Echeclus during the first week after its 2017 December outburst taken at the Faulkes North and South Telescopes and the NASA IRTF, the largest outburst since 2005. The coma was seen to be highly asymmetric. A secondary peak was seen in the near-infrared 2D spectra, which is strongly hinted at in the visible images, moving hyperbolically with respect to the nucleus. The retrieved reflectance spectrum of Echelcus is consistent with the unobscured nucleus but becomes bluer when a wider extraction aperture is used. We find that Echeclus’s coma is best explained as dominated by large blue dust grains, which agrees with previous work. We also conducted a high-resolution orbital integration of Echeclus’s recent evolution and found no large orbital changes that could drive its modern evolution. We interpret the second peak in the visible and near-infrared data sets as a large cloud of larger-than-dust debris ejected at the time of outburst. If Echeclus is typical of the Centaurs, there may be several debris ejection or fragmentation events per year on other Centaurs that are going unnoticed.
New Insights into Interstellar Object 1I/2017 U1 (‘Oumuamua) from SOHO/STEREO Nondetections
Authors: Hui 許 Man-To 文韜 , Knight Matthew M. 
Published: December 2019

Abstract
Object 1I/2017 U1 (‘Oumuamua) is the first interstellar small body ever discovered in the solar system. By the time of discovery, it had already passed perihelion. To investigate the behavior of ‘Oumuamua around perihelion, we searched for it in Solar and Heliospheric Observatory (SOHO) and Solar TErrestrial RElations Observatory (STEREO) images from early 2017 September (preperihelion), but did not detect it. The nondetection of ‘Oumuamua by STEREO renders more stringent constraints on its physical properties thanks to the extreme forward-scattering observing geometry. Assuming a geometric albedo of p

V
= 0.1, the effective scattering cross-section of any dust coma was

m2. Assuming that it behaved like a typical solar system comet, this would correspond to a total mass of ≲20 ± 2 kg and a water production rate of ≲(6.1 ± 0.5) × 1025 s−1 at a heliocentric distance of r
H = 0.375 au. If scaled to post-discovery r
H, the water production rate would be smaller than any of the previously reported upper limits by at least an order of magnitude. To exhibit the reported nongravitational motion with our default assumptions requires a nucleus bulk density ≲40 kg m−3; higher bulk densities are possible for other assumptions. Alternatively, we show that thermal fracturing could have plausibly removed an inert surface layer between these observations and discovery, thus initiating activity after ‘Oumuamua left the field of view of STEREO.
Improved Analysis of Clarke Exobelt Detectability
Authors: Sallmen Shauna , Korpela Eric J. , Crawford-Taylor Kaisa 
Published: December 2019

Abstract
We analyze the potential transit light curve effects due to a Clarke belt of satellites around an exoplanet. Building on code and analysis from Korpela et al., we refine the transit analysis of Socas-Navarro by incorporating limb-darkening and taking an observer-centered approach to examining residuals. These considerations make Clarke exobelt detectability more difficult than previous estimates. We also consider practical dynamical issues for exobelts, confirming that synchronously orbiting belts are dynamically unstable around planets in the habitable zones of M stars, and determining the maximum quasi-stable belt size in these situations. Using simulations for both G and M stars, we conclude that to have an even marginally detectable impact on transit light curves, exobelts must be substantially denser than previous estimates. We also estimate collision rates for the required satellite densities assuming random orbits, and find that they would present significant monitoring and guidance challenges. If detectable belts exist, they would require some (possibly high) degree of ordering to avoid collisions, and must be actively maintained or they will dissipate on relatively short astronomical timescales. We conclude that detectable exobelts are likely to be rare, and have extremely low prospects for detection by transit monitoring from both current and upcoming missions.
Analysis of HST WFPC2 Observations of Centaur 29P/Schwassmann–Wachmann 1 while in Outburst to Place Constraints on the Nucleus’ Rotation State
Authors: Schambeau Charles A. , Fernández Yanga R. , Samarasinha Nalin H. , Woodney Laura M. , Kundu Arunav 
Published: December 2019

Abstract
We present analysis of Hubble Space Telescope observations of Centaur 29P/Schwassmann–Wachmann 1 (SW1) while in outburst to characterize the outburst coma and place constraints on the nucleus’ spin state. The observations consist of Wide Field and Planetary Camera 2 (WFPC2) images from Cycle 5, GO-5829 acquired on UT 1996 March 11.3 and 12.1, which serendipitously imaged the Centaur shortly after a major outburst. A multi-component coma was detected consisting of an expanding outburst dust coma with complex morphology possessing an east–west asymmetry and north–south symmetry contained within 5″ (∼19,000 km) of the nucleus, the residual dust shell of an earlier UT 1996 February outburst, and a nearly circular coma with underlying quiescent activity level detectable to ∼70″ (∼267,000 km) away from the nucleus. Photometry of the calibrated WFPC2 images resulted in an equivalent R-band magnitude of 12.86 ± 0.02 for a measured 5″ radius aperture and an estimated (2.79 ± 0.05) × 108 kg for the lower limit of dust material emitted during the outburst. No appreciable evolution of morphological features, indicating signatures of nuclear rotation, was detected between the two imaging epochs. The observations were modeled using a 3D Monte Carlo coma model to place constraints on the nucleus’ rotation state. Modeling indicated that the morphology is representative of a non-isotropic ejection of dust emitted during a single outburst event with a duration of the order of hours from a single source region corresponding to ∼1% of the surface area. A spin period with lower limit of the order of days is suggested to reproduce the coma morphology seen in the observations.
Intense Geomagnetic Storm during Maunder Minimum Possibly by a Quiescent Filament Eruption
Authors: Isobe Hiroaki , Ebihara Yusuke , Kawamura Akito D. , Tamazawa Harufumi , Hayakawa Hisashi 
Published: December 2019

Abstract
The Sun occasionally undergoes the so-called grand minima, in which its magnetic activity, measured by the number of sunspots, is suppressed for decades. The most prominent grand minima, since the beginning of telescopic observations of sunspots, is called the Maunder minimum (1645–1715), which occurred when the sunspots became rather scarce. The mechanism underlying the grand minima remains poorly understood as there is little observational information of the solar magnetic field at that time. In this study, we examine the records of one candidate aurora display in China and Japan during the Maunder minimum. The presence of auroras in such mid-magnetic latitudes indicates the occurrence of great geomagnetic storms that are usually produced by strong solar flares. However, the records of contemporary sunspot observations from Europe suggest that, at least for the likely aurora event, there was no large sunspot that could produce a strong flare. Through simple theoretical arguments, we show that this geomagnetic storm could have been generated by an eruption giant quiescent filament or a series of such events.
Disentangling Planets from Photoelectric Instability in Gas-rich Optically Thin Dusty Disks
Authors: Castrejon Areli , Lyra Wladimir , Richert Alexander J. W. , Kuchner Marc 
Published: December 2019

Abstract
Structures in circumstellar disks such as gaps and rings are often attributed to planets. This connection has been difficult to show unequivocally, as other processes may also produce these features. In particular, a photoelectric instability (PEI) has been proposed, operating in gas-rich optically thin disks, that generates structures predicted by planet–disk interactions. We examine the question of how to disentangle the planetary effects on disk structure from the effects of the PEI. We use the Pencil Code to perform 2D global hydrodynamical models of the dynamics of gas and dust in a thin disk with and without planetary perturbers. Photoelectric heating is modeled with an equation of state where pressure is proportional to dust surface density. The drag force on grains and its backreaction on the gas are included. Analyzing the situation without PEI, we find that gas–dust interactions alter the shape of the planetary gap from the dust-free case when the local dust-to-gas ratio ε approaches unity. This result also applies to primordial disks, because dust drifting inward accumulates at the edge of the planetary gap, and any initial dust-to-gas ratio eventually achieves ε = 1 if the dust reservoir is sufficient. We find a result particular to high dust-to-gas ratio disks as well: as dust drifts inward, the dust front becomes a sharp transition, and the backreaction triggers the Rossby wave instability. When PEI is included, we find that it obscures structures induced by planets unless the planet’s mass is sufficiently large to carve a noticeable gap. Specifically, the instability generates arcs and rings of regular spacing: a planet is discernible when it carves a dust gap wider than the wavelength of the PEI.
A Statistical Approach to Planetesimal Condensate Composition beyond the Snowline Based on the Carbon-to-oxygen Ratio
Authors: Pekmezci G. S. , Johnson T. V. , Lunine J. I. , Mousis O. 
Published: December 2019

Abstract
The ratio between carbon and oxygen is regarded as an important driver of circumstellar and planetary chemistry, which can be used as a parameter to estimate the fractionation among refractory and volatile portions of a planet. From this motivation, nearly 500 stars including some with planets discovered around them are investigated. The relation between the C/O ratio and fractions of icy and refractory species is traced for planetesimals expected to form in their protostellar disks. It is found that low C/O ratios lead to planets rich in ice, but poor in organic and other refractory materials. With increasing C/O ratios, the ice fraction diminishes, where organics increase and other refractory materials dominate. Apart from that, the carbon portion incorporated in the solid phase and the redox state of the environment are altered to analyze their influence on bulk formation for generated planets. Under zero solid carbon contribution, ice formation decreases and refractory formation increases with increasing C/O ratio. When the carbon contribution is considered to be entirely in the solid phase, refractory materials are not significantly affected by the increasing C/O ratio while ice may even disappear. For reducing conditions, the C/O ratio is not an obstacle for ice formation no matter how high it is. Under oxidizing conditions, however, water is not found where the C/O ratio is greater than 0.8. Bulk densities are also calculated according to alternative scenarios along with compositional distributions, and results are compared to solar system objects. This study, therefore, exemplifies how a simple correlation can be drawn between stellar chemistry, redox state, and planetesimal composition.
Présentation du dossier
Authors: Pasquier Chantal 
Published: December 2019

Dans ce dossier, des professionnels de l’information, de la communication, de la veille, des experts de la donnée, nous parlent avec passion de leur parcours. Ils nous offrent, à chaque fois, bien plus qu’un bilan et un témoignage : un véritable autoportrait, riche et singulier. Et dans le même temps, se dégage de cette diversité un certain nombre de traits communs. De quoi nous aider à mieux définir les contours d’une profession que nous avons parfois tant de mal à expliquer à nos amis, notre famille, nos collègues... On nous dira que ces parcours sont exceptionnels, à l’image de leurs auteurs. Certes. Mais gageons que vous vous y reconnaîtrez au détour d’une phrase, d’une anecdote, d’un défi. Et tant mieux si l’on y trouve matière à inspiration !
Dans le ciel des EPN, dans la mer des métadonnées : les aventures d’un steward devenu catalogueur au sommet de l’État
Authors: Thebault Didier 
Published: December 2019

C’est l’histoire d’un garçon qui se rêvait steward et qui atterrit avec bonheur… dans une bibliothèque. Après avoir volé sur quelques tapis magiques : des slides au kilomètre, des écrans tactiles interactifs. Comment passe-t-on des bassins d’entrainement d’Air France à l’auditorium de la Bibliothèque nationale de France ? Du tunnel sous la Manche aux Espaces publics numériques ? De steward, à coordinateur des métadonnées du catalogue du Centre de documentation des services du Premier Ministre ? D’expert process pour Renault et Thalès, à Président de la Fulbi, et vice-président de l’IABD ? Mon parcours professionnel est jalonné d’heureux hasards et de belles rencontres. Et j’ai su, parfois, forcer le destin.
Dans l’univers de la documentation audiovisuelle : le récit d’une expérience riche et pleine d’enseignements
Authors: Roy Isabelle 
Published: December 2019

Au début de mon parcours et, avant même, lors de ma formation, je n’imaginais pas la richesse et la diversité de ce métier ! Passionnée par l’image et par l’histoire, je suis devenue documentaliste audiovisuelle, puis consultante en ingénierie documentaire. J’exerce aujourd’hui dans une agence de communication. Dans la même journée, j’accompagne des clients, je pilote des projets avec mon équipe, je fais de la veille sur les outils, sur les formats, sur les aspects juridiques, droits d’auteur et droit à l’image… Et ce dans des secteurs très variés. Mon itinéraire a été marqué par trois grands chocs technologiques : l’arrivée d’Internet, la vidéo numérique et aujourd’hui l’intelligence artificielle. Tout évolue très vite, et il faut s’adapter aux usages et aux nouveaux défis. Mais sans jamais céder sur ce qui fait la beauté et la richesse de notre métier : le sens de la valeur.
Le combat de l’ADBS pour améliorer le statut des personnels de documentation dans la Fonction publique d’État : 40 ans de militance
Authors: Baude Catherine 
Published: December 2019

Depuis longtemps, l’ADBS œuvre en faveur de la reconnaissance professionnelle des personnels de documentation dans les services de l’État. Dès les années 80, s’appuyant sur les travaux de la Commission de coordination de la documentation administrative (CCDA), l’ADBS demande un statut pour les documentalistes de la fonction publique et développe un ensemble d’actions pour promouvoir le métier documentaire : élaboration d’enquêtes, publication d’un référentiel des emplois et des compétences, organisation de journées d’études. Cette démarche « militante » va lui conférer progressivement un rôle d’interlocuteur privilégié des pouvoirs publics sur la question de l’élaboration d’un cadre statutaire pour les documentalistes et archivistes dans l’administration. Dans les années 90, la commission Statuts mène un travail de sensibilisation auprès des pouvoirs publics. Elle obtient, en 1998, la création par décret d’un statut interministériel des chargés d’études documentaires (CED). Ce statut concerne actuellement environ 800 professionnels, documentalistes et archivistes, dans les ministères et administrations de l’État. Aujourd’hui, l’ADBS poursuit son action, via une stratégie interassociative. En effet, si l’avenir du statut semble incertain, du fait de la faiblesse des recrutements dans le corps interministériel, un élargissement à d’autres métiers connexes, dans le cadre plus large des trois fonctions publiques, aurait tout son sens. L’administration ne saurait se passer de professionnels de la documentation qualifiés et bien formés pour l’accompagner, et notamment, organiser la gouvernance de l’information et répondre aux enjeux de la transformation digitale.
La question des revues dans la science ouverte : une approche fonctionnelle
Authors: Schöpfel Joachim , Fabre Renaud 
Published: December 2019

La science ouverte est devenue une priorité de premier rang de la politique de recherche de l’État français. Parmi les axes de cette politique, se trouve l’ouverture des données de recherche et des publications scientifiques. A partir de ses fonctions traditionnelles (qualité, propriété intellectuelle, diffusion, conservation), l'article interroge l'impact de la politique de la science ouverte sur les revues scientifiques, en particulier dans trois domaines : leur rôle dans le fonctionnement des dispositifs d’évaluation et de suivi (fonction politique), leur rôle dans le fonctionnement des dispositifs de données, en particulier pour l’acquisition et l’exploitation des données massives par l’industrie de l’information (fonction Big Data ), et leur rôle dans le fonctionnement économique des éditeurs, agrégateurs, agences etc. (fonction économique). Dans la mesure où l’accès aux revues devient gratuit, la question se pose si l’usage des revues ne devient pas le véritable produit des plateformes, par le biais des informations générées.
L’instrumentation de la lutte contre les inégalités d’accès à l’activité physique. Un gouvernement des conduites par la qualité
Authors: Illivi Frédéric , Honta Marina 
Published: December 2019

L’analyse de la mise en œuvre du plan « Sport Santé Bien-Être » (PSSBE) dans une région française donne à voir un État qui agit par incitation et délégation au moyen d’instruments d’action publique (IAP). Parce qu’elles favorisent l’intéressement de réseaux d’acteurs aux enjeux du « sport-santé », ces technologies de gouvernement participent pleinement à sa diffusion et à sa régulation territoriales. Elles cherchent surtout à agir sur la qualité et la sécurité de l’offre en rationalisant les conduites des acteurs collectifs pour mieux orienter, ensuite, les décisions des individus et des prescripteurs d’activité physique que sont les professionnels de santé. L’institutionnalisation du PSSBE donne également à voir de nouvelles formes de coopération entre l’État, les collectivités territoriales et les diverses catégories d’opérateurs. Ces relations étant parfois marquées par des logiques de protection des positions et des ressources, des dispositifs sont pensés pour stabiliser les partenariats entre les acteurs du sport et ceux de la santé.
Enfoque clínico de las relaciones entre salud y trabajo : contribuciones y desafíos
Authors: Pujol Andrea , Gutiérrez María Inés 
Published: December 2019

El artículo reconstruye brevemente las perspectivas de abordaje de las relaciones salud y trabajo que contribuyen a la comprensión de la problemática de la salud laboral en Argentina. En el desarrollo se consideran de modo estilizado sus principales supuestos y orientaciones ; posteriormente considera aportes de la clínica del trabajo que discuten algunos principios que orientan estas intervenciones, sus alcances y desafíos. El análisis se posiciona en la clínica del trabajo –que asume en Argentina carácter emergente- ; destaca los aportes que la diferencian de los enfoques predominantemente en uso tanto en el plano de las proposiciones de base como en sus derivaciones metodológicas. Como cierre, se esbozan algunos desafíos de la clínica del trabajo en nuestro campo disciplinar que, de ser asumidos, permitirán enriquecer los debates y prácticas actuales de la psicología en torno a las tensiones que se expresan en el plano de la salud en los actuales escenarios laborales.
Vulval Cancer: When should I Stop Resecting? Identifying the Factors that Predict Recurrence
Authors: Platt Sarah Louise , Newton Claire Louise , Humphrey Pauline J , Pawade Joya P , Nama Vivek V 
Published: December 2019

Abstract
Context: Vulval cancer surgery has become more conservative and it is important to understand whether resection margins alone influence recurrence rates or whether other prognostic factors should be considered when planning treatment. Aims: The aim of this study is to define factors that predict vulval cancer recurrence, enabling development of a recurrence prediction model. Settings and Design: This was a Aretrospective descriptive analysis of new vulval squamous cell carcinoma cases in a gynecological oncology center (January 1, 2007 to December 31, 2013). Subjects and Methods: Analysis of tumor characteristics and treatments. Patient outcomes were recorded, identifying recurrences, and subsequent interventions. Statistical Analysis Used: Univariable and multivariable logistic regression tools applied to determine recurrence risk factors. Results: Seventy patients underwent primary vulval surgery. Bilateral groin node dissection was performed in 26/70 (37.1%) cases and unilateral groin node dissection in 9/70 (12.9%) cases. 57/70 (82%) cases had a negative vulval resection margin, with 67% <8-mm margin. 18/70 (26%) patients underwent adjuvant treatment. Overall recurrence rate of 21/70 (30%): 14/70 locally and 7/70 at the groin. Median survival was 84.2 months and median disease-free interval was 19.1 months. Factors that were statistically significant in predicting recurrence were positive groin histology, lymphovascular space invasion (LVSI), and disease stage. Conclusions: We reported a reduction in the size of tumor-free margins at primary excision. The recurrence rate of 30% is within the previously reported range, suggesting that factors aside from resection margin (LVSI, stage, and groin node involvement) are also important in predicting recurrence. These factors should be incorporated into a prediction model when planning adjuvant treatment.