bluuebunny/crossref_metadata_2025_split huggingface dataset:
An Excited-state OH Maser Survey toward WISE Point Sources
Authors: Ouyang Xu-Jia , Chen Xi , Shen Zhi-Qiang , Li Bin , Wu Ya-Jun , Chen Hong-Ying , Li Xiao-Qiong , Yang Kai , Song Shi-Min , Qiao Hai-Hua 
Published: June 2022

Abstract
We report a survey of excited-state hydroxyl (ex-OH) masers at the 4.7 and 6.0 GHz transitions toward a sample consisting of 3348 massive star-forming region candidates selected from the all-sky Wide-field Infrared Survey Explorer point-source catalog. The survey was conducted with the Shanghai Tianma Radio Telescope. In total, 6, 9, and 30 sources were detected with the ex-OH masers at the 4766, 6031, and 6035 MHz transitions, respectively. Among them, one 4766 MHz, one 6031 MHz, and five 6035 MHz ex-OH maser sources are newly identified. A series of statistical analyses derived that the ex-OH masers were detected efficiently toward the subsamples associated with both the 6.7 GHz CH3OH maser and radio recombination lines (RRLs), whereas compared to the CH3OH masers, the ex-OH masers are more likely to be produced toward the sources with stronger 22 μm band emission. A significant luminosity correlation is found between the ex-OH masers and RRLs. In addition, we found that the magnetic field strength of most sources with the 6.7 GHz CH3OH maser was stronger relative to that of sources without the CH3OH maser. Combined with these, it demonstrates that the ex-OH maser is associated with more evolved star-forming regions, likely associated with thicker dust envelopes. Meanwhile, the ex-OH masers might be a potential tracer for measuring the Galactic magnetic field information on the large-scale views using their Zeeman pairs.
Radio-loud Quasars above Redshift 4: Very Long Baseline Interferometry (VLBI) Imaging of an Extended Sample
Authors: Krezinger Máté , Perger Krisztina , Gabányi Krisztina Éva , Frey Sándor , Gurvits Leonid I. , Paragi Zsolt , An Tao , Zhang Yingkang , Cao Hongmin , Sbarrato Tullia 
Published: June 2022

Abstract
High-redshift radio sources provide plentiful opportunities for studying the formation and evolution of early galaxies and supermassive black holes. However, the number of known radio-loud active galactic nuclei (AGN) above redshift 4 is rather limited. At high redshifts, it appears that blazars, with relativistically beamed jets pointing toward the observer, are in the majority compared to the radio-loud sources with jets misaligned with respect to the line of sight. To find more of these misaligned AGN, milliarcsecond-scale imaging studies carried out with very long baseline interferometry (VLBI) are needed, as they allow us to distinguish between compact-core–jet radio sources and those with more extended emission. Previous high-resolution VLBI studies revealed that some of the radio sources among blazar candidates in fact show unbeamed radio emission on milliarcsecond scales. The most accurate optical coordinates determined with the Gaia astrometric space mission are also useful in the classification process. Here, we report on dual-frequency imaging observations of 13 high-redshift (4 < z < 4.5) quasars at 1.7 and 5 GHz with the European VLBI Network. This sample increases the number of z > 4 radio sources for which VLBI observations are available by about a quarter. Using structural and physical properties, such as radio morphology, spectral index, variability, brightness temperature, as well as optical coordinates, we identified six blazars and six misaligned radio AGNs, with the remaining one tentatively identified as blazar.
The OGLE Collection of Variable Stars: Nearly 66,000 Mira Stars in the Milky Way
Authors: Iwanek Patryk , Soszyński Igor , Kozłowski Szymon , Poleski Radosław , Pietrukowicz Paweł , Skowron Jan , Wrona Marcin , Mróz Przemysław , Udalski Andrzej , Szymański Michał K. , Skowron Dorota M. , Ulaczyk Krzysztof , Gromadzki Mariusz , Rybicki Krzysztof , Ratajczak Milena 
Published: June 2022

Abstract
We present a collection of 65,981 Mira-type variable stars found in the Optical Gravitational Lensing Experiment (OGLE) project database. Two-thirds of our sample (40,356 objects) are located in the Galactic bulge fields, whereas 25,625 stars are in the Galactic disk. The vast majority of the collection (47,532 objects) comprises new discoveries. We provide basic observational parameters of the Mira variables: equatorial coordinates, pulsation periods, I-band and V-band mean magnitudes, I-band brightness amplitudes, and identifications in other catalogs of variable stars. We also provide the I-band and V-band time-series photometry collected since 1997 during the OGLE-II, OGLE-III, and OGLE-IV phases. The classical selection process, i.e., being mostly based on the visual inspection of light curves by experienced astronomers, has led to the high purity of the catalog. As a result, this collection can be used as a training set for machine-learning classification algorithms. Using overlapping areas of adjacent OGLE fields, we estimate the completeness of the catalog to be about 96%. We compare and discuss the statistical features of Miras located in different regions of the Milky Way. We show examples of stars that change their type over time, from a semiregular variable to Mira and vice versa. This data set is perfectly suited to studying the three-dimensional structure of the Milky Way, and it may help to explain the puzzle of the X-shaped bulge.
Stellar Atmospheric Parameters of M-type Stars from LAMOST DR8
Authors: Ding Ming-Yi , Shi Jian-Rong , Wu Yue , Jones Hugh R. A. , Yan Hong-Liang , Li Chun-Qian , Gao Qi , Chen Tian-Yi , Zhang Jing-Hua , Liu Shuai , Yan Tai-Sheng , Xie Xiao-Jin 
Published: June 2022

Abstract
The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Low Resolution Spectroscopic Survey (LRS) provides massive spectroscopic data on M-type stars, and the derived stellar parameters could bring vital help to various studies. We adopt the ULySS package to perform χ
2 minimization with model spectra generated from the MILES interpolator and determine the stellar atmospheric parameters for the M-type stars from LAMOST LRS Data Release 8. Comparison with the stellar parameters from the APOGEE Stellar Parameter and Chemical Abundance Pipeline (ASPCAP) suggests that most of our results have good consistency. For M dwarfs, we achieve dispersions better than 74 K, 0.19 dex, and 0.16 dex for T
eff,

log
g

, and [Fe/H], while for M giants, the internal uncertainties are 58 K, 0.32 dex, and 0.26 dex, respectively. Compared to ASPCAP we also find a systematic underestimation of ΔT
eff = −176 K for M dwarfs and a systematic overestimation of

Δ
log
g

= 0.30 dex for M giants. However, such differences are less significant when we make a comparison with common stars from other literature, which indicates that systematic biases exist in the difference between ASPCAP and other measurements. A catalog of 763,136 spectra corresponding to 616,314 M-type stars with derived stellar parameters is presented. We determine the stellar parameters for stars with T
eff higher than 2900 K, with

log
g

from −0.24 dex to 5.9 dex. The typical precisions are 45 K, 0.25 dex, and 0.22 dex, for T
eff,

log
g

, and [Fe/H], respectively, which are estimated from duplicate observations of the same stars.
MSWIM2D: Two-dimensional Outer Heliosphere Solar Wind Modeling
Authors: Keebler Timothy B. , Tóth Gábor , Zieger Bertalan , Opher Merav 
Published: June 2022

Abstract
The vast size of the Sun’s heliosphere, combined with sparse spacecraft measurements over that large domain, makes numerical modeling a critical tool to predict solar wind conditions where there are no measurements. This study models the solar wind propagation in 2D using the BATSRUS MHD solver to form the MSWIM2D data set of solar wind in the outer heliosphere. Representing the solar wind from 1 to 75 au in the ecliptic plane, a continuous model run from 1995–present has been performed. The results are available for free at http://csem.engin.umich.edu/mswim2d/. The web interface extracts output at desired locations and times. In addition to solar wind ions, the model includes neutrals coming from the interstellar medium to reproduce the slowing of the solar wind in the outer heliosphere and to extend the utility of the model to larger radial distances. The inclusion of neutral hydrogen is critical to recreating the solar wind accurately outside of ∼4 au. The inner boundary is filled by interpolating and time-shifting in situ observations from L1 and STEREO spacecraft when available. Using multiple spacecraft provides a more accurate boundary condition than a single spacecraft with time shifting alone. Validations of MSWIM2D are performed using MAVEN and New Horizons observations. The results demonstrate the efficacy of this model to propagate the solar wind to large distances and obtain practical, useful solar wind predictions. For example, the rms error of solar wind speed prediction at Mars is only 66 km s−1 and at Pluto is a mere 25 km s−1.
The Diffuse X-Ray Background of the Insight-HXMT/LE Telescope in the Galactic Plane
Authors: Jin Jing , Liao Jin-Yuan , Wang Chen , Guan Ju , Li Cheng-Kui , Sai Na , Nang Yi , Liu Yuan , Chen Yong , Li Xiao-Bo , Lu Fang-Jun , Song Li-Ming , Zhang Shu , Zhang Shuang-Nan 
Published: June 2022

Abstract
Accurately estimating of diffuse X-ray background (DXB) is essential for the investigation of sources in the Galactic plane observed with Insight-HXMT/LE, which is a collimated telescope in the soft X-ray energy band with a relatively large field of view. In the high-Galactic-latitude region, DXB is dominated by the cosmic X-ray background, which is almost uniform, but DXB in the Galactic plane region is more complex due to the Galactic H i absorption and the contribution of the Galactic ridge X-ray emission. This study, as a part of background estimation of LE, focuses on estimating the contribution of DXB in the Galactic plane to Insight-HXMT/LE observations. We calculate DXB confined in a region of 0° < l < 360° and ∣b∣ < 10°, where l and b denote Galactic longitude and latitude, respectively, with the first 3 yr of Galactic-plane-scanning survey data of Insight-HXMT/LE. The Galactic plane is divided into 360 × 20 small pixels (1° × 1° per pixel), and a DXB spectrum is obtained for each pixel. An indirect method is developed for the pixels of the bright source regions, which brings a systematic error of ∼10%. The systematic error brought by the satellite attitude is ∼7% on average for all the pixels in the Galactic plane. The LE DXB spectrum obtained in this study is consistent with that reported by RXTE’s Proportional Counter Array.
Rover-mounted Hydrated Mineral Detector for Mars Exploration: A Preliminary Report
Authors: Sam Kim Soon , Ng Eddie , Oh Jeongil , Rahmat-Samii Yahya , Cai Yubin , Paige David 
Published: June 2022

Abstract
The rover-mounted hydrated mineral detector (HMD) is based on a dielectric spectrometer (tuned frequency range of 0.8–4 MHz) that will detect bulk subsurface hydrated minerals in local scale. The HMD is a compact, low-mass (1.5 kg), and low-power instrument (5 W) suitable for Mars application. Compared with orbiter-based instruments with low horizontal resolution (5–10 km), the HMD will offer high resolution (2 m) that can identify optimal sampling sites for the presence of hydrated minerals. From field testing with reduced radio frequency (RF) power (P
rf = 10 mW), the HMD demonstrated detection of shallow buried gypsum samples. When developed with full RF power, the HMD could potentially detect hydrates down to depths of 2 m (P
rf = 1 W) or 4 m (P
rf = 36 W) in Martian soil. Unlike conventional dielectric spectrometers, which require small amounts of the sample (5–10 g) to be placed inside sample cells, the HMD will detect hydrated minerals by scanning over the Mars surface mounted on a rover platform (<1 m above ground) without any sample preparation. This capability will allow future rovers to rapidly assess the scientific potential of field sites. Compared with optical techniques that are limited to surface exposed mineralogical features that could be obscured by dust and weathering products, the HMD will detect bulk subsurface hydrated minerals along the rover traverse irrespective of surface obscuration. The HMD (TRL 4) is a proof-of-concept instrument that can be developed and matured for future Mars rover missions.
Variability in Titan’s Mesospheric HCN and Temperature Structure as Observed by ALMA
Authors: Thelen Alexander E. , Nixon Conor A. , Cosentino Richard G. , Cordiner Martin A. , Teanby Nicholas A. , Newman Claire E. , Irwin Patrick G. J. , Charnley Steven B. 
Published: June 2022

Abstract
The temperature structure of Titan’s upper atmosphere exhibits large variability resulting from numerous spatially and temporally irregular external energy sources, seasonal changes, and the influence of molecular species produced via photochemistry. In particular, Titan’s relatively abundant HCN is thought to provide substantial cooling to the upper atmosphere through rotational emission, balancing UV/EUV heating, and thermal conduction. Here we present the analysis of ALMA observations of Titan from 2012, 2014, 2015, and 2017, corresponding to planetocentric solar longitudes of ∼34°–89°, including vertical HCN and temperature profiles retrieved from the lower mesosphere through the thermosphere (∼350–1200 km; 3 × 10−2–2 × 10−8 mbar). Throughout the atmosphere, temperature profiles differ by 10 to 30 K between observations approximately 1 Earth yr apart, particularly from 600 to 900 km. We find evidence for a large imbalance in Titan’s upper atmospheric energy budget between 2014 and 2015, where the mesospheric thermal structure changes significantly and marks the transition between a mesopause located at ∼600 km (2 × 10−4 mbar) and ∼800 km (3 × 10−6 mbar). The retrieved HCN abundances vary dramatically during the 2012–2017 time period as well, showing close to 2 orders of magnitude difference in abundance at 1000 km. However, the change in HCN abundance does not appear to fully account for the variation in mesospheric temperatures over the L

S
∼ 34°–89° period. These measurements provide additional insight into the variability of Titan’s mesospheric composition and thermal structure following its 2009 vernal equinox and motivate continued investigation of the origins of such rapid changes in Titan’s atmosphere throughout its seasonal cycle.
The Effect of Desensitizing Agent on Shear Bond Strength to Dentin using Three Self-etching Bonding Systems at Different Time Intervals. An In Vitro Study
Authors: Al-Chalabi Ashraf S. , Taher Rajaa , Chakmakchi Makdad 
Published: June 2022

Objectives: To investigate the shear bond strength of dentin surfaces using different self-etching bonding systems after treating with a desensitizing agent at different time intervals.

Materials and methods: 63 sound upper premolars were used, the ‎occlusal aspect was sectioned at the middle in a ‎vertical direction into buccal and ‎palatal halves. Each ‎specimen was mounted and a flat dentin surface was ‎prepared at the middle third of each specimen. The sectioned samples were divided into 3 groups according to the bonding agent n=42. One-half of each tooth was treated with desensitizing agent Quadrant FiniSense then both halves were bonded with one of the three self-etching bonding systems (G-Premio bonding‎, i Bond, Clearfil S3 bound plus). ‎After adhesive procedures, a composite resin was applied against the tooth to form ‎a cylinder ‎(2mm×4mm) and cured. From each group 14 specimens were stored in distilled water at 37° C for 24 ‎hours, 7 days, and 72 days. At the end of each interval, the samples were tested for the shear bond strength using a universal testing machine (Instron). Data were analyzed using the Independent t-test and One Way ANOVA Test and Duncan’s Multiple Range Test.

Results: All bonding systems showed lower bonding strength when samples were treated with desensitizer with a significant difference at all time intervals except for the i bond group which showed no significant difference in bond strength at a period of 7 and 72 days in treated and without desensitizer treated samples.

Conclusion: Obliteration of dentinal by dentin desensitizer may have a negative effect on the bonding strength of the self-etching bonding systems.
L’écoute, une compétence sociale
Authors: Guyon Marc 
Published: June 2022

L’auteur regarde la compétence comme une modélisation de l’activité de travail qui la produit. L’analyse du travail permet de définir la compétence sociale comme résultat d’une activité. L’intervenant (le formateur) doit alors disposer d’une théorie de l’activité de travail pour accéder à l’intelligence de l’activité humaine, y compris la sienne – sur laquelle fonder une évaluation située des compétences sociales. L’article s’attache à une compétence sociale fondamentale pour le chercheur, l’intervenant, l’enseignant ou le formateur : l’écoute.
Transmission générationnelle des savoirs professionnels : compétences transversales et formation des étudiants en alternance
Authors: Baujard Corinne 
Published: June 2022

Cet article envisage les compétences transversales des étudiants en alternance, les conditions dans lesquelles elles se construisent par la formation d’un savoir en action, d’un savoir d’expérience ou d’un savoir professionnel. La transmission au sein des parcours de professionnalisation soulève des interrogations sur la modularité des formations. A partir d’une démarche exploratoire menée auprès d’apprentis d’une formation master, il apparaît que la circulation des savoirs entre générations se manifeste selon diverses trajectoires d’apprentissage. En quoi les compétences transversales constituentelles une posture professionnelle formative de transmission des savoirs auprès de jeunes apprentis ?
Préserver se conjugue, même au futur
Authors: Cifali Mireille 
Published: June 2022

Pour réfléchir au futur, l’auteure s’en tient à l’aspect de la formation se fondant sur la rencontre entre un professionnel et des personnes en quête d’un développement, d’une place, d’un savoir. Elle envisage les dimensions vers lesquelles va son inquiétude actuelle : souci de la relation, d’un soi en rapport à un autre tenu comme un sujet ; soin d’une rencontre, d’un accompagnement, d’une temporalité nécessaire pour penser et réfléchir ; maintien d’une sensibilité et d’une qualité. Plutôt que de projeter, elle sauvegarde ce qui aurait à perdurer tout en se transformant. C’est le verbe préserver que l’auteure conjugue. Avec une double question : peut-on prévenir certaines évolutions que l’on juge destructrices d’un humain ? Comment une formation des adultes pourrait-elle apporter sa contribution ?
Quelles perspectives pour l’autoformation ?
Authors: Eneau Jérôme 
Published: June 2022

Revenant sur cinq décennies qui ont permis de structurer les travaux scientifiques sur l’autoformation, cet article en dresse un panorama pour montrer comment les recherches ont accompagné des changements profonds, dans le monde du travail en particulier, mais aussi des évolutions sémantiques qui reflètent la prégnance toujours plus forte d’une obligation à se former soi-même pour rester employable. Encore faut-il ne pas considérer l’autoformation comme une simple injonction à « se débrouiller seul », tout comme l’idée de « se former tout au long de la vie » ne saurait être asservie à une stricte production des compétences.
Accompagner les transitions en mobilisant l’approche par les compétences pour garantir la liberté de choisir son avenir professionnel
Authors: Beauvois Catherine 
Published: June 2022

L’accompagnement des transitions est le parent pauvre des discours actuels qui ne parlent plus que d’approche par les « compétences », soupçonnée d’être une modalité supplémentaire de la responsabilisation des seuls actifs contraints de s’adapter à un marché de l’emploi en évolution accélérée. Si ce risque existe, l’approche compétences ne mérite pourtant pas d’être ainsi caricaturée. Outre le fait qu’elle ne pourra être mise en œuvre que si les acteurs institutionnels parviennent à se coordonner, elle est un vrai levier d’émancipation qui doit être accompagné en tant que tel, en s’appuyant sur une politique active de certification, d’identification des compétences transversales et de qualification de l’expérience.
Mises en situation en milieu professionnel : mode d’emploi
Authors: Duclos Laurent 
Published: June 2022

Les périodes de mise en situation en milieu professionnel sont ouvertes à toute personne faisant l’objet d'un accompagnement. En dépit d’une détermination réglementaire détaillée, elles ne constituent pas en elles-mêmes leur propre mode d’emploi. Il est nécessaire, à cet égard, de clarifier les stratégies de mobilisation qui permettent de faire de cet outil un générateur d’opportunités pour les publics réputés éloignés de l’emploi, l’instrument par excellence de « l’expérience accompagnée », comme un support aux démarches visant à infléchir les comportements d’embauche des entreprises. De ce point de vue, le « bon usage » des pmsmp peut accroître le pouvoir de valorisation des intermédiaires du marché du travail.
La formation demain, un bien commun
Authors: Ardouin Thierry 
Published: June 2022

Interroger la « formation demain » invite à repérer les tendances du champ pour les situer dans un cadre plus large. L’article étudie les tendances perçues. L’auteur analyse plus spécifiquement les tensions pour deux d’entre elles : la multimodalité de la formation et l’approche par blocs de compétences, au regard des apprenants, des formateurs, des entreprises et de l’environnement. Il interroge la formation demain au regard du droit à l’éducation et pose les finalités de la formation entre bien collectif, bien privé et bien individuel.
Dialogue, dialectique, dialogie en formation avec les histoires de vie
Authors: Pineau Gaston 
Published: June 2022

Narrer l’expérience vécue pour former son histoire de vie mobilise un ternaire éprouvant : dialogue, dialectique, dialogie. La première partie revient sur une histoire de dialogues qui a initié la configuration d’un champ dialectique pour construire un modèle dialogique d’ auto - et de co -formation historique. La seconde survole la façn dont l’histoire culturelle complexe et mouvementée de ce ternaire permet, à côté des courants (auto) biographiques plus classiques, la montée d’un modèle dialogique des histoires de vie qui actualise et démocratise la dialectique comme art de dialogues, formateurs de devenirs.
Coopération et enquête collective
Authors: Messina Virginie , Lameul Geneviève , Roullais Yann , Lorcy Pauline 
Published: June 2022

A partir d’une expérimentation de coopération dans le projet desir (Développement d’un enseignement supérieur innovant à Rennes, 2017-2020), cet article cherche à montrer comment peut se vivre la conversion anthropologique à laquelle invitent les auteurs du texte introductif de ce dossier, conduisant le chercheur à travailler « avec » tous les acteurs, quels que soient leurs statuts respectifs. Après avoir questionné le contexte et les enjeux de ce projet, et précisé les notions et concepts au fondement de la démarche étudiée, le texte rend compte de la manière dont ingénieurs pédagogiques et chercheurs se rencontrent autour de la problématique de l’accompagnement des transformations pédagogiques dans l’enseignement supérieur. A partir des travaux de Laurent, les auteurs postulent qu’aucune coopération ne peut s’exercer sans institutions qui puissent en accueillir les pratiques. L’article aborde la question des institutions de coopération en situation de recherche coopérative à partir de la notion d’enquête collective, en s’appuyant sur un exemple de mise en œuvre d’un carnet de bord, outil de coopération pour l’ingénierie et la recherche, et exemple emblématique révélateur des enjeux d’une telle méthodologie.