bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Second Chromatic Timing Event of Interstellar Origin toward PSR J1713+0747
Authors: Lam M. T. , Ellis J. A. , Grillo G. , Jones M. L. , Hazboun J. S. , Brook P. R. , Turner J. E. , Chatterjee S. , Cordes J. M. , Lazio T. J. W. , DeCesar M. E. , Arzoumanian Z. , Blumer H. , Cromartie H. T. , Demorest P. B. , Dolch T. , Ferdman R. D. , Ferrara E. C. , Fonseca E. , Garver-Daniels N. , Gentile P. A. , Gupta V. , Lorimer D. R. , Lynch R. S. , Madison D. R. , McLaughlin M. A. , Ng C. , Nice D. J. , Pennucci T. T. , Ransom S. M. , Spiewak R. , Stairs I. H. , Stinebring D. R. , Stovall K. , Swiggum J. K. , Vigeland S. J. , Zhu W. W. 
Published: July 2018

Abstract
The frequency dependence of radio pulse arrival times provides a probe of structures in the intervening media. Demorest et al. was the first to show a short-term (∼100–200 days) reduction in the electron content along the line of sight to PSR J1713+0747 in data from 2008 (approximately MJD 54750) based on an apparent dip in the dispersion measure of the pulsar. We report on a similar event in 2016 (approximately MJD 57510), with average residual pulse-arrival times ≈−3.0, −1.3, and −0.7 μs at 820, 1400, and 2300 MHz, respectively. Timing analyses indicate possible departures from the standard ν
−2 dispersive-delay dependence. We discuss and rule out a wide variety of potential interpretations. We find the likeliest scenario to be lensing of the radio emission by some structure in the interstellar medium, which causes multiple frequency-dependent pulse arrival-time delays.
High-redshift BL Lac Objects: Spectroscopy of Candidates
Authors: Landoni M. , Paiano S. , Falomo R. , Scarpa R. , Treves A. 
Published: July 2018

Abstract
We report on 16 BL Lacertae objects that were proposed to be at z > 1. We present spectroscopic observations secured at the 10.4 m GTC that allowed us to assess the redshift of these sources. In particular, for five objects, we disprove the previous value of the redshift reported in the literature and found that they lie at z < 1. Moreover, two of them exhibit broad emission lines that are not characteristic of BL Lacertae objects. On the other hand, for eight targets, we improve the tentative value of z, previously based on only one feature, by detecting a number of emission lines. Finally, in three cases, we detect the onset of the Lyα forest at z > 2.50. Based on the new high quality spectra, we found that only half of the observed objects can be classified as bona-fide BL Lacs.
The 1.4 mm Core of Centaurus A: First VLBI Results with the South Pole Telescope
Authors: Kim Junhan , Marrone Daniel P. , Roy Alan L. , Wagner Jan , Asada Keiichi , Beaudoin Christopher , Blanchard Jay , Carlstrom John E. , Chen Ming-Tang , Crawford Thomas M. , Crew Geoffrey B. , Doeleman Sheperd S. , Fish Vincent L. , Greer Christopher H. , Gurwell Mark A. , Henning Jason W. , Inoue Makoto , Keisler Ryan , Krichbaum Thomas P. , Lu Ru-Sen , Muders Dirk , Müller Cornelia , Nguyen Chi H. , Ros Eduardo , SooHoo Jason , Tilanus Remo P. J. , Titus Michael , Vertatschitsch Laura , Weintroub Jonathan , Zensus J. Anton 
Published: July 2018

Abstract
Centaurus A (Cen A) is a bright radio source associated with the nearby galaxy NGC 5128 where high-resolution radio observations can probe the jet at scales of less than a light day. The South Pole Telescope (SPT) and the Atacama Pathfinder Experiment performed a single-baseline very-long-baseline interferometry (VLBI) observation of Cen A in 2015 January as part of VLBI receiver deployment for the SPT. We measure the correlated flux density of Cen A at a wavelength of 1.4 mm on a ∼7000 km (5 Gλ) baseline. Ascribing this correlated flux density to the core, and with the use of a contemporaneous short-baseline flux density from a Submillimeter Array observation, we infer a core brightness temperature of 1.4 × 1011 K. This is close to the equipartition brightness temperature, where the magnetic and relativistic particle energy densities are equal. Under the assumption of a circular Gaussian core component, we derive an upper limit to the core size ϕ = 34.0 ± 1.8 μas, corresponding to 120 Schwarzschild radii for a black hole mass of 5.5 × 107 M
⊙.
Using Machine Learning Methods to Forecast if Solar Flares Will Be Associated with CMEs and SEPs
Authors: Inceoglu Fadil , Jeppesen Jacob H. , Kongstad Peter , Marcano Néstor J. Hernández , Jacobsen Rune H. , Karoff Christoffer 
Published: July 2018

Abstract
Among the eruptive activity phenomena observed on the Sun, those that threaten human technology the most are flares with associated coronal mass ejections (CMEs) and solar energetic particles (SEPs). Flares with associated CMEs and SEPs are produced by magnetohydrodynamical processes in magnetically active regions (ARs) on the Sun. However, these ARs do not only produce flares with associated CMEs and SEPs, they also lead to flares and CMEs, which are not associated with any other event. In an attempt to distinguish flares with associated CMEs and SEPs from flares and CMEs, which are unassociated with any other event, we investigate the performances of two machine learning algorithms. To achieve this objective, we employ support vector machines (SVMs) and multilayer perceptrons (MLPs) using data from the Space Weather Database of Notification, Knowledge, Information of NASA Space Weather Center, the Geostationary Operational Environmental Satellite, and the Space-Weather Heliospheric and Magnetic Imager Active Region Patches. We show that True Skill Statistics (TSS) and Heidke Skill Scores (HSS) calculated for SVMs are slightly better than those from the MLPs. We also show that the forecasting time frame of 96 hr provides the best results in predicting if a flare will be associated with CMEs and SEPs (TSS = 0.92 ± 0.09 and HSS = 0.92 ± 0.08). Additionally, we obtain the maximum TSS and HSS values of 0.91 ± 0.06 for predicting that a flare will not be associated with CMEs and SEPs for the 36 hr forecast window, while the 108 hr forecast window gives the maximum TSS and HSS values for predicting that CMEs will not be accompanying any events (TSS = HSS = 0.98 ± 0.02).
Statistical Test of Distance–Duality Relation with Type Ia Supernovae and Baryon Acoustic Oscillations
Authors: Ma Cong , Corasaniti Pier-Stefano 
Published: July 2018

Abstract
We test the distance–duality relation

between cosmological luminosity distance (

) from the JLA SNe Ia compilation and angular-diameter distance (

) based on Baryon Oscillation Spectroscopic Survey (BOSS) and WiggleZ baryon acoustic oscillation measurements. The

measurements are matched to

redshift by a statistically consistent compression procedure. With Monte Carlo methods, nontrivial and correlated distributions of η can be explored in a straightforward manner without resorting to a particular evolution template

. Assuming independent constraints on cosmological parameters that are necessary to obtain

and

values, we find 9% constraints consistent with η = 1 from the analysis of SNIa + BOSS and an 18% bound results from SNIa + WiggleZ. These results are contrary to previous claims that η < 1 has been found close to or above the 1σ level. We discuss the effect of different cosmological parameter inputs and the use of the apparent deviation from distance–duality as a proxy of systematic effects on cosmic distance measurements. The results suggest possible systematic overestimation of SNIa luminosity distances compared with

data when a Planck ΛCDM cosmological parameter inference is used to enhance the precision. If interpreted as an extinction correction due to a gray dust component, the effect is broadly consistent with independent observational constraints.
Asymmetry in Solar Torsional Oscillation and the Sunspot Cycle
Authors: B Lekshmi , Nandy Dibyendu , Antia H. M. 
Published: July 2018

Abstract
Solar torsional oscillations are migrating bands of slower- and faster-than-average rotation, which are strongly related to the Sun’s magnetic cycle. We perform a long-term study (16 yr) of hemispherical asymmetry in solar torsional oscillation velocity using helioseismic data for the first time. We study the north–south asymmetry in the velocity using the zonal flow velocities obtained by ring diagram analysis of the Global Oscillation Network Group (GONG) Doppler images. We find significant hemispherical asymmetry in the torsional oscillation velocity and explore its variation with respect to depth, time, and latitude. We also calculate the hemispherical asymmetry in the surface velocity measurements from the Mount Wilson Observatory and the zonal flow velocities obtained from the Helioseismic and Magnetic Imager ring diagram pipeline. These asymmetries are found to be consistent with the asymmetry obtained from GONG observations. We show that the asymmetry in near-surface torsional oscillation velocity is correlated with the asymmetry in magnetic flux and sunspot number at the solar surface, with the velocity asymmetry preceding the flux and sunspot number asymmetries. We speculate that the asymmetry in torsional oscillation velocity may help in predicting the hemispherical asymmetry in sunspot cycles.
Compétences psychologiques pour une société globale émergente : un autre regard sur la « personne de demain » de Rogers en tant que modèle
Authors: O’Hara Maureen , Dreyfus-Asséo Sylvie , Randin Jean-Marc 
Published: July 2018

Les contextes culturels dans lesquels nous vivons et qui nous servent de référence ne sont plus stables et sont perturbés à une échelle inégalée. Cela entraîne une rupture entre les esprits humains et les contextes extérieurs dans lesquels ils sont plongés. Il y a trois réponses possibles à cette crise de cohérence psychologique : réactive, psychotique ou transformative. Carl Rogers a identifié les caractéristiques des personnes capables de répondre de manière transformationnelle. Il a montré l’émergence d’un nouveau mode de conscience et de compétences psychologiques nouvelles. L’Approche centrée sur la personne n’est pas simplement une approche thérapeutique efficace, mais aussi une puissante pédagogie qui soutient l’apprentissage transformationnel nécessaire pour forger les personnes de demain. Il est temps aujourd’hui de replacer la mission et le but de la théorie et de la pratique centrées sur la personne, et de les étendre au-delà du contexte de la thérapie individuelle dans des sphères sociales et civiques plus larges.
L’expérience du vieillissement autour de la soixantaine en France. Âge subjectif et genre
Authors: Bozon Michel , Gaymu Joëlle , Lelièvre Éva 
Published: July 2018

Les expériences très différenciées de l’âge et du vieillissement qu’ont les hommes et les femmes sont un indicateur puissant de la recomposition contemporaine des inégalités de genre et de leur inscription au plus profond de l’intimité. L’article propose une analyse qualitative de cette dynamique à partir du discours d’une vingtaine d’enquêtés âgés de 55 à 69 ans, de tous les milieux sociaux et demeurant dans la région parisienne et dans une petite ville du sud-ouest de la France, recueilli par entretien semi-directif.
Un patrimoine alimentaire endormi. Le cas de la vallée pyrénéenne du Vicdessos
Authors: Fournier Tristan , Lepiller Olivier , Simonet Guillaume 
Published: July 2018

à partir d’une enquête ethnographique menée dans la vallée pyrénéenne du Vicdessos, territoire à potentialité patrimoniale mais caractérisé par une absence de dynamique en la matière, l’article analyse les obstacles à la patrimonialisation alimentaire. La mise en récit comparative de quatre établissements de restauration donne à voir plusieurs écueils qui doivent eux-mêmes être replacés dans le contexte socio-historique de la vallée, marquée par la présence d’une aluminerie pendant près d’un siècle (1907-2003). La potentialité patrimoniale de l’agriculture, de l’élevage et des traditions culinaires apparaît ainsi impensée, peut-être parce qu’elle est aujourd’hui impensable dans ce territoire marqué par le projet déçu de « faire ville » et de s’émanciper de la condition agricole. L’article invite finalement à étendre la théorie de la patrimonialisation à des conditions sociales situées bien en amont de la marchandisation du patrimoine et qui relèvent de la construction du regard bienveillant qu’un collectif est capable ou non de porter sur son passé commun.
Les frontières du genre
Authors: Bidet Jennifer 
Published: July 2018

Résumé Cet article interroge le décalage de normes de genre entre pays d'origine et pays d'installation, expérimenté par des descendantes d'immigrés algériens nées en France, lors de leurs voyages en Algérie. À rebours de discours politiques attribuant aux « cultures d'origine » le sexisme subi par les femmes issues de l'immigration maghrébine, l'enquête ethnographique menée en Algérie analyse, sans les essentialiser, les normes sexuées auxquelles sont confrontées les descendantes d'immigrés sur place. C'est à chaque fois une dimension particulière des rôles sexués (différenciation des attentes en termes de sexualité prénuptiale ; différenciation des formes de sociabilité dans la famille élargie ; différenciation des rôles parentaux dans le couple), articulée avec des trajectoires sociales divergentes, qui vient définir des contraintes spécifiques et les réponses construites par les vacancières pour y faire face. Passer la frontière entre la France et l'Algérie amène les femmes rencontrées à devoir redéfinir aussi bien les limites dans la sexuation des espaces (privés et publics), que les prérogatives identifiées comme féminines ou masculines dans le partage des tâches au sein du couple. L'article se concentre sur les mobilités féminines en vacances, mais il éclaire aussi en contre-point la diversité des mobilités masculines.
La greffe coloniale en métropole
Authors: Escafré-Dublet Angéline , Kesztenbaum Lionel , Simon Patrick 
Published: July 2018

Résumé Entre 1947 et 1962, le statut des indigènes musulmans de l'Algérie coloniale connaît des modifications importantes et se rapproche progressivement de celui des « Français d'Algérie ». En particulier les Algériens présents en France métropolitaine ne se distinguent pas, en théorie au moins, des métropolitains. Dans les faits, pourtant, la présence en métropole de ces populations, coloniales et migrantes, nourrit les inquiétudes des pouvoirs publics et les expose à un ensemble de traitements spécifiques, le plus souvent discriminatoires. Cela nécessite de distinguer et d'identifier les Algériens présents en France, qualifiés de « Français Musulmans d'Algérie », en dérogation à la loi et au cadre égalitaire métropolitain. Cet article explore les déterminants et les mécanismes de cette distinction à partir d'une étude détaillée des opérations de recensement de 1954. Il montre comment le contexte colonial influence l'élaboration et la mise en œuvre du recensement et conduit l'administration métropolitaine à fabriquer une procédure d'identification des Algériens en rupture avec ses usages habituels.
Le travail féministe et le « problème musulman » au Planning familial
Authors: Romerio Alice 
Published: July 2018

Résumé L'espace de la cause des femmes est clivé et traversé par les problématisations de la question du voile présentes dans le débat public. Cet article propose d'analyser la réception différenciée du « problème musulman » en discours et en pratique dans l'espace associatif féministe français à partir d'une enquête ethnographique dans des associations départementales du Planning familial. En s'intéressant à la forme organisationnelle développée localement, cet article met en évidence le poids combiné de l'organisation du travail et des propriétés sociales des agent·e·s, dans les représentations du travail féministe et le rapport aux usagères musulmanes.
Enhanced-Fluence Pulsed-Light Iontophoresis Corneal Cross-linking: 1-Year Morphological and Clinical Results
Authors: Mazzotta Cosimo , Bagaglia Simone Alex , Vinciguerra Riccardo , Ferrise Marco , Vinciguerra Paolo 
Published: July 2018

PURPOSE:
To assess the safety and efficacy of a novel pulsed-light enhanced-fluence iontophoresis corneal cross-linking (EF I-CXL) procedure in patients with progressive keratoconus.

METHODS:

This prospective interventional pilot study included 12 eyes of 10 patients. Iontophoresis with Ricrolin+ solution (Sooft, Montegiorgio, Italy) was used for stromal imbibition. The treatment energy dose (fluence) was optimized at 30% (from 5.4 J to 7 J/cm
2
) and ultraviolet-A (UV-A) power set at 18 mW/cm
2
× 6.28 minutes of exposure time, pulsing the light 1 second on/1 second off with a total irradiation time of 12.56 minutes. Uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), Scheimpflug corneal tomography data, and corneal optical coherence tomography (OCT) at baseline and 1, 3, 6, and 12 months postoperatively were evaluated.

RESULTS:

Twelve-month statistically significant average data (
P
< .05) showed UDVA decreased from 0.50 ± 0.10 to 0.36 ± 0.08 logMAR, maximum keratometry decreased from 52.86 ± 1.50 to 51.49 ± 0.90 diopters (D), surface asymmetry index decreased from 2.34 ± 0.36 to 2.13 ± 1.12 D, symmetry index decreased from 4.22 ± 1.01 to 3.56 ± 0.90 D, and coma decreased from 0.25 ± 0.05 to 0.14 ± 0.06
μ
m. Corneal OCT showed greater than 80% demarcation line detection at 295.8 ± 20.2
μ
m depth on average in the first postoperative month.

CONCLUSIONS:
The preliminary results of the EF I-CXL protocol demonstrate its capability to increase I-CXL efficacy closer to standard CXL.

[
J Refract Surg.
2018;34(7):438–444.]
Diagnosing the radiative and chemical contributions to future changes in tropical column ozone with the UM-UKCA chemistry–climate model
Authors: Keeble James , Bednarz Ewa M. , Banerjee Antara , Abraham N. Luke , Harris Neil R. P. , Maycock Amanda C. , Pyle John A. 
Published: July 2018

Abstract. Chemical and dynamical drivers of trends in tropical total-column ozone (TCO3) for the recent past and future periods are explored using the UM-UKCA (Unified Model HadGEM3-A (Hewitt et al., 2011) coupled with the United Kingdom Chemistry and Aerosol scheme) chemistry–climate model. A transient 1960–2100 simulation is analysed which follows the representative concentration pathway 6.0 (RCP6.0) emissions scenario for the future. Tropical averaged (10° S–10° N) TCO3 values decrease from the 1970s, reach a minimum around 2000 and return to their 1980 values around 2040, consistent with the use and emission of halogenated ozone-depleting substances (ODSs), and their later controls under the Montreal Protocol. However, when the ozone column is subdivided into three partial columns (PCO3) that cover the upper stratosphere (PCO3US), lower stratosphere (PCO3LS) and troposphere (PCO3T), significant differences in the temporal behaviour of the partial columns are seen. Modelled PCO3T values under the RCP6.0 emissions scenario increase from 1960 to 2000 before remaining approximately constant throughout the 21st century. PCO3LS values decrease rapidly from 1960 to 2000 and remain constant from 2000 to 2050, before gradually decreasing further from 2050 to 2100 and never returning to their 1980s values. In contrast, PCO3US values decrease from 1960 to 2000, before increasing rapidly throughout the 21st century and returning to 1980s values by  ∼  2020, and reach significantly higher values by 2100. Using a series of idealised UM-UKCA time-slice simulations with concentrations of well-mixed greenhouse gases (GHGs) and halogenated ODS species set to either year 2000 or 2100 levels, we examine the main processes that drive the PCO3 responses in the three regions and assess how these processes change under different emission scenarios. Finally, we present a simple, linearised model to describe the future evolution of tropical stratospheric column ozone values based on terms representing time-dependent abundances of GHG and halogenated ODS.
Grazing increases litter decomposition rate but decreases nitrogen release rate in an alpine meadow
Authors: Sun Yi , He Xiong Z. , Hou Fujiang , Wang Zhaofeng , Chang Shenghua 
Published: July 2018

Abstract. Litter decomposition and N release are the key processes that strongly
determine the nutrient cycling at the soil–plant interface; however, how
these processes are affected by grazing or grazing exclusion in the alpine
grassland ecosystems on the Qinghai-Tibetan Plateau (QTP) is poorly
understood. So far few studies have simultaneously investigated the influence
of both litter quality and incubation site on litter decomposition and N
release. Moreover, previous studies on the QTP investigating how grazing
exclusion influences plant abundance and biodiversity usually lasted for many
years, and the short-term effects have rarely been reported. This work
studied the short-term (6 months) effects of grazing and grazing exclusion on
plant community composition (i.e., plant species presented) and litter
quality and long-term (27–33 months) effects on soil chemical
characteristics and mixed litter decomposition and N release on the QTP. Our
results demonstrate that (1) shorter-term grazing exclusion had no effect on
plant community composition but increased plant palatability and total litter
biomass; (2) grazing resulted in higher N and C content in litter; and (3) grazing
accelerated litter decomposition, while grazing exclusion promoted N
release from litter and increased soil organic carbon. In addition,
incubation site had significantly more impact than litter quality on
litter decomposition and N release, while litter quality affected
decomposition in the early stages. This study provides insights into the
mechanisms behind the nutrient cycling in alpine ecosystems. We suggest that
periodic grazing and grazing exclusion is beneficial in grassland management
on the QTP.
¿Hacia la "desfamiliarización" del cuidado predilecto? Un análisis del contexto español (1997-2009)
Authors: Celia Fernández-Carro  
Published: July 2018

Se ha afirmado que en España se «prefiere» el cuidado informal debido a que esa es la forma de apoyo mayoritaria. Sin embargo, ¿se escogería como primera opción en términos ideales? Utilizando tres encuestas del Centro de Investigaciones Sociológicas (1997, 2001 y 2009), este trabajo analiza la evolución reciente de las preferencias de la población española por tres tipos de apoyo; informal, basado en cuidadores familiares, formal, de servicios públicos y privados, o mixto, que combine los dos anteriores, así como la evolución de las características sociodemográficas de las personas que optarían por cada uno de ellos.
Los resultados sugieren que, aunque la preferencia de la familia como cuidadora sigue siendo mayoritaria, la preferencia por formas de cuidado formales ha crecido sustancialmente en las últimas décadas.