bluuebunny/crossref_metadata_2025_split huggingface dataset:
Seismological Studies of Pulsating DA White Dwarfs Observed with the Kepler Space Telescope and K2 Campaigns 1–8
Authors: Hall Weston , Castanheira Barbara G. , Bischoff-Kim Agnès 
Published: May 2023

Abstract
AllS single stars that are born with masses up to 8.5–10 M
⊙ will end their lives as white dwarf (WD) stars. In this evolutionary stage, WDs enter the cooling sequence, where the stars radiate away their thermal energy and are basically cooling. As these stars cool, they reach temperatures and conditions that cause the stars to pulsate. Using differential photometry to produce light curves, we can determine the observed periods of pulsation from the WD. We used the White Dwarf Evolution Code (WDEC) to calculate a grid of over one million models with various temperature, stellar mass, and mass of helium and hydrogen layers and calculated their theoretical pulsation periods. In this paper, we describe our approach to WD asteroseismology using WDEC models, and we present seismological studies for 29 observed DAVs in the Kepler and K2 data sets, 25 of which have never been analyzed using these observations and 19 of which have never been seismically analyzed in any capacity before. Learning about the internal structure of WDs places important constraints on the WD cooling sequence and our overall understanding of stellar evolution for low-mass stars.
High Tide or Riptide on the Cosmic Shoreline? A Water-rich Atmosphere or Stellar Contamination for the Warm Super-Earth GJ 486b from JWST Observations
Authors: Moran Sarah E. , Stevenson Kevin B. , Sing David K. , MacDonald Ryan J. , Kirk James , Lustig-Yaeger Jacob , Peacock Sarah , Mayorga L. C. , Bennett Katherine A. , López-Morales Mercedes , May E. M. , Rustamkulov Zafar , Valenti Jeff A. , Adams Redai Jéa I. , Alam Munazza K. , Batalha Natasha E. , Fu Guangwei , Gonzalez-Quiles Junellie , Highland Alicia N. , Kruse Ethan , Lothringer Joshua D. , Ortiz Ceballos Kevin N. , Sotzen Kristin S. , Wakeford Hannah R. 
Published: May 2023

Abstract
Planets orbiting M-dwarf stars are prime targets in the search for rocky exoplanet atmospheres. The small size of M dwarfs renders their planets exceptional targets for transmission spectroscopy, facilitating atmospheric characterization. However, it remains unknown whether their host stars’ highly variable extreme-UV radiation environments allow atmospheres to persist. With JWST, we have begun to determine whether or not the most favorable rocky worlds orbiting M dwarfs have detectable atmospheres. Here, we present a 2.8–5.2 μm JWST NIRSpec/G395H transmission spectrum of the warm (700 K, 40.3× Earth’s insolation) super-Earth GJ 486b (1.3 R
⊕ and 3.0 M
⊕). The measured spectrum from our two transits of GJ 486b deviates from a flat line at 2.2σ − 3.3σ, based on three independent reductions. Through a combination of forward and retrieval models, we determine that GJ 486b either has a water-rich atmosphere (with the most stringent constraint on the retrieved water abundance of H2O > 10% to 2σ) or the transmission spectrum is contaminated by water present in cool unocculted starspots. We also find that the measured stellar spectrum is best fit by a stellar model with cool starspots and hot faculae. While both retrieval scenarios provide equal quality fits (

χ

ν

2

=
1.0

) to our NIRSpec/G395H observations, shorter wavelength observations can break this degeneracy and reveal if GJ 486b sustains a water-rich atmosphere.
Scary Barbie: An Extremely Energetic, Long-duration Tidal Disruption Event Candidate without a Detected Host Galaxy at z = 0.995
Authors: Subrayan Bhagya M. , Milisavljevic Dan , Chornock Ryan , Margutti Raffaella , Alexander Kate D. , Ramakrishnan Vandana , Duffell Paul C. , Dickinson Danielle A. , Lee Kyoung-Soo , Giannios Dimitrios , Lentner Geoffery , Linvill Mark , Garretson Braden , Graham Matthew J. , Stern Daniel , Brethauer Daniel , Duong Tien , Jacobson-Galán Wynn , LeBaron Natalie , Matthews David , Sears Huei , Venkatraman Padma 
Published: May 2023

Abstract
We report multiwavelength observations and characterization of the ultraluminous transient AT 2021lwx (ZTF20abrbeie; aka “Barbie”) identified in the alert stream of the Zwicky Transient Facility (ZTF) using a Recommender Engine For Intelligent Transient Tracking filter on the ANTARES alert broker. From a spectroscopically measured redshift of 0.995, we estimate a peak-observed pseudo-bolometric luminosity of log(

L

max

/

[
erg

s

−
1

]

) = 45.7 from slowly fading ztf-g and ztf-r light curves spanning over 1000 observer-frame days. The host galaxy is not detected in archival Pan-STARRS observations (g > 23.3 mag), implying a lower limit to the outburst amplitude of more than 5 mag relative to the quiescent host galaxy. Optical spectra exhibit strong emission lines with narrow cores from the H Balmer series and ultraviolet semi-forbidden lines of Si iii] λ1892, C iii] λ1909, and C ii] λ2325. Typical nebular lines in Active Galactic Nucleus (AGN) spectra from ions such as [O ii] and [O iii] are not detected. These spectral features, along with the smooth light curve that is unlike most AGN flaring activity and the luminosity that exceeds any observed or theorized supernova, lead us to conclude that AT 2021lwx is most likely an extreme tidal disruption event (TDE). Modeling of ZTF photometry with MOSFiT suggests that the TDE was between a ≈14M
⊙ star and a supermassive black hole of mass M
BH ∼ 108
M
⊙. Continued monitoring of the still-evolving light curve along with deep imaging of the field once AT 2021lwx has faded can test this hypothesis and potentially detect the host galaxy.
A new species of Nidirana Dubois, 1992 (Anura, Ranidae) from Chongqing Municipality, China
Authors: Ma Qi , Wang Zhijian 
Published: May 2023

The Nidirana Dubois, 1992 exhibit a ubiquitous presence in East and Southeast Asia, spanning from Japan west to southern China and from northern Thailand to northern Vietnam and Laos in the south. The taxonomic categorisations pertaining to this genus continue to be a subject of debate, particularly with regard to those species that possess broad geographical distributions. In China, 18 species of Nidirana are currently recognised.
We describe a new species of this genus from south-western China. Mitochondrial 16S and COⅠ gene phylogenetic analyses support the new species as an independent clade nested within the Nidirana. The new species is phylogenetically close to N. yaoica, with a genetic distance of 2.5% from its sister taxon. Morphologically, the new species can be distinguished from congeners by a combination of the following characteristics: males relatively small (SVL 41.8-43.3 mm); lateroventral grooves present on both fingers and toes; relative finger length Ⅱ &lt; Ⅰ &lt; Ⅳ &lt; Ⅲ; tibio-tarsal articulation reaching to the level of the eye or nostril; a pair of external subgular vocal sacs in males; one single nuptial pad on the dorsal surface of the base of the first finger in males during the breeding season; webbing formula I 1/2 - 1 II 1/2 - 2 III 1 - 2½ IV 2 - 1V.
First record of the genus Pectapalochrus Tshernyshev, 2016 (Coleoptera, Malachiidae) from China
Authors: Tong Junbo , Tshernyshev Sergei , Liu Haoyu , Yang Yuxia 
Published: May 2023

Pectapalochrus Tshernyshev, 2016 is a small genus belonging to the tribe Apalochrini in the family Malachiidae (Coleoptera, Cleroidea), with four currently known species: P. omega (Evers, 1965) from Mongolia, P. armenus (Iablokoff-Khnzorian, 1978) from Armenia, P. pictus (Motschulsky, 1860) from Russia and P. pectinicornis (Erichson, 1840) from Russia and Mongolia.
Pectapalochrus Tshernyshev, 2016 is newly recorded from China upon the discovery of P. omega (Evers, 1965) from Ningxia Autonomous Region. The morphological characters of the adult are re-described in detail with illustrations of external appearance and relevant characters.
Panorama de dispositifs de classes de découverte (CDD) en France : quelle tension entre enjeux didactiques et fondements pédagogiques ?
Authors: Redondo Cécile , Ladage Caroline 
Published: May 2023

Cet article s’intéresse aux dispositifs de classes de découverte en France que nous analysons du point de vue didactique et pédagogique. Nous nous appuyons sur une méthodologie d’enquête sur Internet réalisée en 2020-2021, au moyen d’un recueil de récits de situations d’enseignement-apprentissage effectué par des étudiants se destinant aux métiers de l’enseignement, de l’éducation et de la formation. Nous étudions le corpus de 261 récits ainsi constitué à la lumière des outils conceptuels de la théorie anthropologique du didactique, pour analyser les enjeux didactiques au cœur des dispositifs de classe de découverte ainsi que les fondements à l’origine des choix pédagogiques des acteurs qui les organisent. Nos résultats font état d’une importante variété de situations pour lesquelles les choix pédagogiques sont plus ou moins justifiés, mettant ainsi en question la réalisation des enjeux didactiques. Notre étude propose un modèle d’analyse didactique et praxéologique, en recherche comme en formation, offrant des repères pour mieux cerner la frontière entre ces deux enjeux.
Élève ou touriste : ce que les enfants vivent et disent de leurs classes de mer
Authors: Brougère Gilles , Peyvel Emmanuelle 
Published: May 2023

À partir de l’observation ethnographique de deux séjours en classe de mer d’une durée de huit à dix jours dans deux sites finistériens, ainsi que d’entretiens avec des groupes d’enfants et d’enseignants, cet article tente de saisir la classe de mer du point de vue des enfants : quelle expérience vivent-ils ? Dans quelle mesure cette expérience renvoie-t-elle à la situation scolaire ou y échappe-t-elle ? Les enfants se considèrent-ils comme des touristes, et comment le justifient-ils ? Ont-ils le sentiment d’apprendre ? Il s’agira de déconstruire les discours souvent clivants tenus par les adultes impliqués dans ce dispositif, valorisant les classes de mer tout autant qu’ils dévalorisent le tourisme.
Conversation avec Philomena Essed
Authors: Essed Philomena , Larcher Silyane 
Published: May 2023

Sociologue néerlandaise vivant aux États-Unis, fille d’immigrés de classe supérieure originaires du Suriname et féministe engagée dans le mouvement des femmes aux Pays-Bas, figure majeure des recherches néerlandaises et européennes sur les processus de racialisation et leurs fondements structurels (sociaux et historiques), Philomena Essed revient sur son parcours de chercheuse « diasporique », entre Europe et Amériques. Racialisée comme « femme de couleur » ou « noire » dans une société où le vocabulaire permettant de nommer et spécifier les rapports sociaux de race dans leur imbrication avec les inégalités sociales de classe et de genre est peu disponible et faiblement diffusé, elle évoque les obstacles rencontrés dans le monde universitaire majoritairement « blanc » et masculin des Pays-Bas des années 1980-1990. Elle souligne les solidarités, mais aussi les ambiguïtés des relations avec les collègues en position dominante à l’université. Elle retrace l’orientation progressivement prise aux États-Unis par ses travaux, inscrits dans une perspective critique de la race sans s’assimiler pour autant aux Critical Race Theories , vers les thèmes de la justice sociale, les enjeux moraux des processus de racialisation et de leurs transformations contemporaines. À partir d’une position située à la croisée de plusieurs mondes, plusieurs héritages sociaux et de plusieurs cultures, elle décrit en creux le contenu éthique qu’elle donne à son identité de chercheuse et d’intellectuelle.
Acquiescement silencieux : Le prix trop élevé du prestige
Authors: Bell Derrick , Zevounou Lionel 
Published: May 2023

Derrick Albert Bell Jr (1930-2011) est considéré 1 comme l’un des – sinon le – fondateurs des Critical Race Theories (CRT) bien qu’il ne se soit jamais présenté comme tel. Si la réception des CRT s’est opérée en France par le biais des études de genre et des sciences sociales, notamment par le travail de Kimberlé W. Crenshaw sur l’intersectionnalité, l’apport de Derrick Bell est relativement resté dans l’ombre. Après avoir milité au NAACP (National Association for the Advancement of Color People), il est le premier Africain-Américain à bénéficier d’une titularisation à la Harvard Law School en 1969. Alors que l’arrêt Brown Board v. Education de 1954 – généralement présenté comme la première décision phare mettant fin à la ségrégation raciale – fut considéré en son temps comme une victoire par une large partie du mouvement sur les droits civiques, Derrick Bell fut l’un des rares juristes à porter un regard sceptique sur la fin du mouvement. Il doute que le système juridique parvienne, à lui seul, à transformer des institutions – dont l’université – profondément façonnées par le racisme et la ségrégation. Au sein de la faculté de droit de Harvard, Derrick Bell se bat pour faire entendre la nécessité d’ouvrir l’accès du corps enseignant aux Noirs et aux minorités (ethniques et de genre) plus largement. C’est ce combat mené pendant une vingtaine d’années sur lequel il revient dans le livre Confronting Authority. Reflections of an Ardent Protester (1994) dont est extrait le texte traduit ici. À travers les colères, les désillusions et un profond pessimisme se révèlent en creux la marginalité et l’isolement politique d’un universitaire noir d’une université d’élite dans l’Amérique post-ségrégationniste. Cette position spécifique s’y présente autant comme une source de résistance à l’injustice raciale que comme la source d’un engagement actif.
Une exploration historique de l’économie sociale en Belgique
Authors: Peiren Luc 
Published: May 2023

L’économie sociale, en Belgique comme ailleurs en Europe, s’enracine historiquement dans les organisations de travailleurs autonomes (mutualités, coopératives) qui, les premières, ont exprimé des préoccupations sociales à l’égard du capitalisme débridé du XIX e siècle, peu soucieux de celles et ceux qui peinaient toujours plus à suivre le mouvement. Nous retrouvons aujourd’hui cette même préoccupation au sein des entreprises sociales qui relient l’engagement social (et l’emploi) à la durabilité et aux objectifs environnementaux. Parfois avec un clin d’œil adressé non seulement au passé idéologique de l’économie sociale (pharmacies coopératives ou sociétés coopératives d’assurance, …), mais également à de nouveaux groupes au sein de notre société (réfugiés, personnes handicapées, …) qui risquent à nouveau d’être laissés pour compte.
L’ESS dans la petite enfance et le grand âge à l’âge néolibéral
Authors: Collectif Pegase  
Published: May 2023

Dans la continuité des études qui montrent depuis plus de dix ans la soumission des organisations de l’ESS à la pression croissante des régulations néolibérales, cette étude conduit une analyse globale, voire sociétale, de ces évolutions dans les secteurs de la petite enfance et du grand âge. Les résultats d’une enquête exploratoire menée auprès des directions de 23 établissements montrent un positionnement variable des organisations de l’ESS sur plusieurs plans : la place de la concurrence, la gouvernance, l’accessibilité, la qualité des services ou encore les conditions de travail. Enfin, cette étude, dans le creux des entretiens ou par défaut, dégage une piste pour une autre régulation de la petite enfance et du grand âge, fondée non sur la pression financière mais sur la coopération entre ESS et pouvoirs publics dans les territoires.
Care Coordination and Transition Management: A New Course to Prepare Prelicensure Students
Authors: Webb Sherry , Adams Tucker Janet 
Published: May 2023

Background:
There is a need for RNs to be skilled at coordinating care and improving transitions within and across a wide variety of clinical settings and in diverse populations. A care coordination and transition management (CCTM) course was developed to address this growing need.

Method:
The course was designed to promote enhanced clinical reasoning as well as synthesis and application of CCTM concepts while focusing on the patient and family perspectives. Learning activities incorporated individual writing assignments, discussion board assignments, and a group project.

Results:
Students demonstrated the application of CCTM concepts in individual and group assignments and used prior and current clinical experiences to connect theory to practice.

Conclusion:

This course helped preli-censure students learn and apply CCTM concepts. Learning activities within the CCTM course could be adapted to be effective in all forms of undergraduate programs as well as graduate nursing programs.

[
J Nurs Educ
. 2023;62(8):471–474.]
Prediction of Implantable Collamer Lens Vault Based on Preoperative Biometric Factors and Lens Parameters
Authors: Di Yu , Li Ying , Luo Yan 
Published: May 2023

Purpose:
To establish and validate the accuracy of implantable collamer lens (ICL) vault size prediction formula based on preoperative biometric factors and lens parameters.

Methods:
This study included 300 patients (300 eyes) with Visian ICL V4c (STAAR Surgical) implantation. They were randomly divided into the formula establishment group and formula validation group. Anterior segment measurements, ICL V4c size and power, and vault 1 week postoperatively were collected from all patients. Multiple linear regression analysis was performed to establish the prediction formula. Mean absolute error (MAE), median absolute error (MedAE), root mean square error (RMSE), and Bland-Altman diagrams were used to evaluate the prediction formula.

Results:

Anterior chamber depth (ACD) had the greatest influence on vault 1 week after ICL V4c implantation, followed by ICL V4c size and angle-to-angle distance (ATA). The prediction formula was obtained according to the partial regression coefficient, which was vault (mm) = −1.279 + 0.291 × ACD (mm) + 0.210 × ICL V4c size (mm) – 0.144 × ATA (mm) (
R
2
= 0.661). In the formula validation group, the mean predictive vault, MAE, MedAE, and RMSE were 628.10, 135.09, 130.42, and 150.46 µm, respectively. The Bland-Altman diagram showed the predictive vault was in good agreement with the actual vault.

Conclusions:
A novel ICL V4c vault prediction formula was developed and shown to be an effective method for predicting the vault to reduce surgical complications.

[
J Refract Surg
. 2023;39(5):332–339.]
Visual Outcomes of Cataract Surgery in Patients With Keratoconus Using Toric and Non-toric Lenses
Authors: Ling Jennifer Y.M. , Qiao Grace , Iovieno Alfonso , Yeung Sonia N. 
Published: May 2023

Purpose:
To compare the accuracy and outcomes of different intraocular lens (IOL) power calculation formulas in eyes with keratoconus undergoing cataract surgery with toric and non-toric IOLs.

Methods:
This was a consecutive retrospective case series study including patients from the Cornea Service at the Department of Ophthalmology and Visual Sciences at the University of British Columbia, Vancouver, Canada, from 2000 to 2020. Keratoconus was diagnosed based on corneal topography and clinician opinion. Patients who underwent topography-guided photorefractive keratectomy, intracorneal ring segments implantation, or corneal transplant were excluded. The manifest spherical equivalent, prediction errors, and median absolute errors were calculated. Descriptive statistics were expressed as mean ± standard deviation.

Results:

There were 160 eyes from 101 patients; 136 eyes received non-toric lenses and 24 eyes received toric lenses. Most patients had mild disease (< 48.00 diopters [D]) when stratified by steep keratometry values. Patients with severe disease (> 53.00 D) were significantly more hyperopic following surgery (
P
< .05). The Barrett Universal II (0.26 D, inter-quartile range [IQR] = 0.4), Holladay 2 (0.31, IQR = 1.2), and SRK/T (0.42, IQR = 0.86) formulas had the lowest median absolute error. The postoperative prediction error following toric lens insertion was not significantly different than following non-toric lens insertion, and the mean absolute astigmatism was significantly reduced with toric lenses.

Conclusions:
The Barrett Universal II, Holladay 2, and SRK/T were the most accurate IOL power calculation formulas in patients with keratoconus undergoing cataract surgery. Hyperopic surprise was increased in severe keratoconus. Toric IOLs may be considered in patients with mild keratoconus.

[
J Refract Surg
. 2023;39(5):319–325.]
Comparison of insertion characteristics of LMA ProSeal and Ambu AuraGain in adult patients under controlled ventilation: A randomised study
Authors: Salhotra Rashmi , Padhy Anurag , Rautela Rajesh S. , Singh Deepak 
Published: May 2023

ABSTRACT

Background and Aims:
Supraglottic devices are preformed or flexible, and the insertion characteristics of the two types may be different. This study aims to compare the insertion characteristics of Ambu AuraGain (AAG), preformed) and LMA ProSeal (PLMA), flexible, requires an introducer tool for placement.

Methods:
Forty American Society of Anesthesiologists (ASA) physical status I/II patients of either sex between 18 and 60 years with no anticipated airway difficulty were randomly allocated to either group AAG or PLMA (n = 20 each). Pregnant females, known case of chronic respiratory disorders and gastroesophageal reflux were excluded. After induction of anaesthesia and muscle relaxation, appropriately sized AAG or PLMA was inserted. Time for successful insertion (primary outcome), ease of device insertion and gastric drain insertion, first attempt success rate (secondary outcomes) were recorded. Statistical analysis was done using SPSS version 20.0. Quantitative parameters were compared using Student’s t-test, and qualitative parameters were compared using Chi-square test. A P value of <0.05 was considered significant.

Results:
Time taken for successful insertion of PLMA was 22.94 ± 6.12 s and for AAG was 24.32 ± 4.96 s, (P = 0.458). Device insertion was significantly easy in PLMA group (P < 0.002). First attempt success rate was achieved in 17 (94.4%) cases in PLMA group compared to 15 (78.9%) cases in AAG group (P = 0.168). Ease of drain tube insertion was comparable among the groups (P = 0.298). The haemodynamic variables were also comparable.

Conclusion:
PLMA is easier to insert as compared to AAG, but the insertion time and first attempt success rate are similar. The preformed curvature in AAG does not provide any added advantage over the non-preformed PLMA.
Evaluation of neck-circumference- thyromental- distance ratio as a predictor of difficult intubation: A prospective, observational study
Authors: Pradeep S , Bhar Kundu Sudeshna , Nivetha C 
Published: May 2023

ABSTRACT

Background and Aims:
Preoperative identification of difficult airway and subsequent planning is of utmost importance for a patient’s safety. Previous studies have identified the ratio of the neck circumference (NC) to the thyromental distance (TMD); NC/TMD as a reliable predictor of difficult intubation in obese patients. But there is a lack of studies evaluating the NC/TMD in non-obese patients. Therefore, the aim of this study was to compare the NC/TMD as a predictor of difficult intubation in both obese and non-obese patients.

Methods:
A prospective, observational study was conducted after obtaining institutional ethics committee clearance and written and informed consent from each patient. One hundred adult patients undergoing elective surgeries under general anaesthesia with orotracheal intubation were included in this study. Difficulty in intubation was assessed using the Intubation Difficulty Scale. The NC/TMD was calculated and the predictive accuracy of NC/TMD and other established parameters in obese and non-obese patients were compared.

Results:
Univariate logistic regression analysis showed that gender, weight, body mass index, inter-incisor gap, Mallampati classification, NC, TMD, sternomental distance, and NC/TMD had a significant association with difficult intubation. NC/TMD has a higher sensitivity, specificity, and positive and negative predictive value with better predictability in comparison to other parameters.

Conclusion:
The NC/TMD is a reliable and better predictor of difficult intubation in both obese and non-obese patients in comparison to NC, TMD, and sternomental distance alone.