bluuebunny/crossref_metadata_2025_split huggingface dataset:
Significance of viscous coalescence in migmatites of the Assam-Meghalaya Gneissic Complex, eastern India
Authors: Gogoi Bibhuti , Chauhan Hiredya 
Published: February 2022

ABSTRACT
The magnetite ocelli preserved in the Chandrapur area of the Assam-Meghalaya Gneissic Complex, eastern India, display viscous coalescence. The viscous coalescence phenomenon generally occurs below a critical capillary number, which is governed by the size of the coalescing droplets. The smaller the size of the coalescing droplets, the greater the possibility that they will exhibit viscous coalescing. From our results we infer that intrusion of younger pegmatitic magma into the much older polyphase deformed quartzofeldspathic gneiss of Chandrapur initiated localized partial melting in the gneissic rocks surrounding the intrusions. This localized partial melting produced small magma pools or leucocratic neosome, which was followed by intermingling between the in situ melt (leucocratic neosome) and external melt (pegmatite), leading to chaotic mixing between the two magmatic phases. Chaotic mixing produced thin veins or filaments of the pegmatitic magma as a result of stretching and folding dynamics. Gradually, the thin filaments underwent capillary instability to produce discrete viscous swirls or ocelli. The ocelli consist of leucocratic minerals like K-feldspar, plagioclase, and quartz, with crystals of magnetite at the center representing magnetite ocelli. The mineralogical assemblage of the ocelli matches that of the pegmatitic rocks. After their formation, some of the smaller magnetite ocelli underwent very gentle collisions due to the effect of capillary and viscous forces. Such collisions produced pairs, clusters, or linear structures that are now preserved in the migmatites of the study area.
Possible Chemical Composition And Interior Structure Models Of Venus Inferred From Numerical Modelling
Authors: Shah Oliver , Helled Ravit , Alibert Yann , Mezger Klaus 
Published: February 2022

Abstract
Venus’ mass and radius are similar to those of Earth. However, dissimilarities in atmospheric properties, geophysical activity, and magnetic field generation could hint toward significant differences in the chemical composition and interior evolution of the two planets. Although various explanations for the differences between Venus and Earth have been proposed, the currently available data are insufficient to discriminate among the different solutions. Here we investigate the possible range of models for Venus’ structure. We assume that core segregation happened as a single-stage event. The mantle composition is inferred from the core composition using a prescription for metal-silicate partitioning. We consider three different cases for the composition of Venus defined via the bulk Si and Mg content, and the core’s S content. Permissible ranges for the core size, mantle, and core composition as well as the normalized moment of inertia (MoI) are presented for these compositions. A solid inner core could exist for all compositions. We estimate that Venus’ MoI is 0.317–0.351 and its core size 2930–4350 km for all assumed compositions. Higher MoI values correspond to more oxidizing conditions during core segregation. A determination of the abundance of FeO in Venus’ mantle by future missions could further constrain its composition and internal structure. This can reveal important information on Venus’ formation and evolution, and, possibly, the reasons for the differences between Venus and our home planet.
Coronal Rain in Randomly Heated Arcades
Authors: Li Xiaohong , Keppens Rony , Zhou Yuhao 
Published: February 2022

Abstract
Adopting the MPI-AMRVAC code, we present a 2.5-dimensional magnetohydrodynamic simulation, which includes thermal conduction and radiative cooling, to investigate the formation and evolution of the coronal rain phenomenon. We perform the simulation in initially linear force-free magnetic fields that host chromospheric, transition-region, and coronal plasma, with turbulent heating localized on their footpoints. Due to thermal instability, condensations start to occur at the loop top, and rebound shocks are generated by the siphon inflows. Condensations fragment into smaller blobs moving downwards, and as they hit the lower atmosphere, concurrent upflows are triggered. Larger clumps show us clear coronal rain showers as dark structures in synthetic EUV hot channels and as bright blobs with cool cores in the 304 Å channel, well resembling real observations. Following coronal rain dynamics for more than 10 hr, we carry out a statistical study of all coronal rain blobs to quantify their widths, lengths, areas, velocity distributions, and other properties. The coronal rain shows us continuous heating–condensation cycles, as well as cycles in EUV emissions. Compared to the previous studies adopting steady heating, the rain happens faster and in more erratic cycles. Although most blobs are falling downward, upward-moving blobs exist at basically every moment. We also track the movement of individual blobs to study their dynamics and the forces driving their movements. The blobs have a prominence-corona transition-region-like structure surrounding them, and their movements are dominated by the pressure evolution in the very dynamic loop system.
Evidence for A Hot Wind from High-resolution X-Ray Spectroscopic Observation of the Low-luminosity Active Galactic Nucleus in NGC 7213
Authors: Shi Fangzheng , Zhu Bocheng , Li Zhiyuan , Yuan Feng 
Published: February 2022

Abstract
Supermassive black holes (SMBHs) spend most of their lifetime accreting at a rate well below the Eddington limit, manifesting themselves as low-luminosity active galactic nuclei (LLAGNs). The prevalence of a hot wind from LLAGNs is a generic prediction by theories and numerical simulations of black hole accretion and has recently become a crucial ingredient of AGN kinetic feedback in cosmological simulations of galaxy evolution. However, direct observational evidence for this hot wind is still scarce. In this work, we identify significant Fe xxvi Lyα and Fe xxv Kα emission lines from high-resolution Chandra grating spectra of the LLAGN in NGC 7213, a nearby Sa galaxy hosting a ∼108
M
⊙ SMBH, confirming previous work. We find that these lines exhibit a blueshifted line-of-sight velocity of ∼1100 km s−1 and a high XXVI Lyα to XXV Kα flux ratio, implying for a ∼16 keV hot plasma. By confronting these spectral features with synthetic X-ray spectra based on our custom magnetohydrodynamical simulations, we find that the high-velocity, hot plasma can be naturally explained by the putative hot wind driven by the hot accretion flow powering this LLAGN. Alternative plausible origins of this hot plasma, including stellar activities, AGN photoionization, and the hot accretion flow itself, are quantitatively disfavored. The inferred kinetic energy and momentum carried by the wind can serve as strong feedback to the environment. We compare NGC 7213 to M81*, in which strong evidence for a hot wind was recently presented, and discuss implications on the universality and detectability of hot winds from LLAGNs.
Can a Single Population Account for the Discriminant Properties in Fast Radio Bursts?
Authors: Zhong Shu-Qing , Xie Wen-Jin , Deng Can-Min , Li Long , Dai Zi-Gao , Zhang Hai-Ming 
Published: February 2022

Abstract
It is still a highly debated question as to whether fast radio bursts (FRBs) are classified into one or two populations. To probe this question, we perform a statistical analysis using the first Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) catalog and identify a few discriminant properties between repeating and non-repeating FRBs such as the repetition rate, duration, bandwidth, spectral index, peak luminosity, and potential peak frequency. If repeating and non-repeating FRBs belong to one population, their distribution distinctions for the repetition rate and duration can be explained by the selection effect due to the beamed emission as in Connor et al. However, we obtain that the distribution distinctions for the spectral index and potentially the peak frequency cannot be explained by the beamed emission within the framework of either the coherent curvature radiation or synchrotron maser emission. This indicates that there could be two populations. We further discuss three possible scenarios for the required two populations.
Prepare for Impact!
Authors: Nozdrachev Timur , Zubko Evgenij , Kochergin Anton , Chornaya Ekaterina , Zheltobryukhov Maxim , Videen Gorden , Wada Koji 
Published: February 2022

Abstract
We model the motion of the WE0913A object based on the latest ephemeris and confirm its impact on the far side of the Moon on 2022 March 4. However, this latest ephemeris suggests that the impact will occur at 12:34 pm (UTC) and will be close enough to the lunar limb that the dust cloud could be visible from Earth. The impact could lead to the ejection of a mass of 677 kg, having a velocity in excess of 610 m s−1, and 195 kg moving faster than the lunar escape velocity. Such an ejecta cloud could become apparent shortly after impact in ground-based observations slightly above the equator (∼1/8 of the lunar radius) over the dark side of the Moon. In the V filter of the Johnson photometric system, the ejecta cloud is expected to be brighter than 4 mag, making possible its detection even at dawn.
Conduction of Academic Examination in the University Campus by the Medicine College during Coronavirus Disease 2019 Pandemic: Elaboration of Precautionary Methods
Authors: Alghsham Ruqaih , Rasheed Zafar , Shariq Ali , Alduraibi Sharifa , Ahmed Ahmed A. , Alkhowailed Mohammad , Aqeel Aqeel , Alhomaidan Homaidan , Alqossayir Fuhaid , Alsoghair Mansour , Alamer Ali , Alkhamiss Abdullah , Al Abdulmonem Waleed 
Published: February 2022

Objective: This study was undertaken to elaborate the precautionary methods taken by the College of Medicine of Qassim University for conduction of students’ academic examinations (exams) in the university campus during the COVID-19 pandemic. Methods: This study was conducted on undergraduate medical students (n=674) from the September 2020 to April 2021 in the College of Medicine at Qassim University. The switch into conducting exams within the center was managed by the exam committee. Multiple online workshops were conducted to the staff and students regarding the precautionary measures and the exam procedures in order to prevent the transmission of the disease among students and staff. New guidelines for undertaking the exams were designed and implemented at the exam centers in the university campus during COVID-19 pandemic. Results: All the exams were conducted in a satisfactory manner under one roof under the supervision of the invigilation team within the examination center located in the university campus. The strict implementation of precautionary guidelines and the crucial steps to prevent the spread of Coronavirus facilitated the accomplishment of this vital task in a smooth manner with no case of COVID-19 reported in any of the staff or students who participated in this activity. Conclusions: This study revealed the precautionary methods and steps undertaken by the college of medicine, Qassim University in terms of conducting exams within campus. We concluded that if implementation of precautionary measures should be carried out in a proper manner then it is possible to conduct exams under one roof.
L’héroïne sportive au cinéma, entre représentation régressive et domination patriarcale
Authors: Sudre David 
Published: February 2022

Le sport étant construit comme une réserve masculine, les films sportifs populaires sont surtout centrés sur les protagonistes masculins jusqu’au milieu du XX e siècle. Après 1990, les femmes obtiennent des rôles plus visibles et deviennent parfois le centre narratif de leur propre histoire. Appuyé sur l’analyse d’un corpus de 28 films de fiction dont une femme est le centre, cet article questionne la représentation des femmes dans ce genre cinématographique, le rôle qu’elle joue dans les apprentissages informels des identités sociales de sexe et sa participation au maintien du patriarcat. Il souligne que ces films sportifs consolident les rapports de domination hommes/femmes en mettant (quasi) systématiquement en scène les sportives sous le joug d’un homme dominant, entité décisionnaire pour elles. Puis montre que ces longs métrages présentent une figure paternelle valorisée au détriment d’une figure maternelle fréquemment dévalorisée et régressive. Il ouvre des perspectives de recherche sur les effets de ces films sur la socialisation de leurs publics, particulièrement jeune et féminin.
La contribution de François Recanati à la compréhension de la critique lacanienne de l’ontologie
Authors: Almeida Luiz Fellipe 
Published: February 2022

Cet article vise à mettre en valeur la participation de François Recanati au séminaire de Jacques Lacan entre 1972 et 1973, qui fut un court moment d’adhésion du philosophe au lacanisme. Je soutiens que la densité de ses interventions résume et éclaire la critique de l’ontologie qui se dégage à ce moment de l’enseignement lacanien. Principalement appuyé par l’intervention du 12 décembre 1972, l’article cherche à expliciter en quoi elle sert de synthèse des notions qui découlent de cette critique : (1) l’idée de l’être comme section de prédicat, (2) l’« encore » de la jouissance comme dérangement existentiel et, par conséquent, (3) la substance analytique comme irrésolution ontologique. Je conclus en lançant brièvement quelques questions théorico-cliniques soulevées par ces interventions, considérées donc comme des parties essentielles des séminaires ... ou pire et Encore .
« Désistement » et virtus dormitiva : heurs et malheurs de l’étiologie en psychanalyse
Authors: Ayouch Thamy 
Published: February 2022

Pour appréhender les « homosexualités », nombre de psychanalystes reprennent souvent la notion de « désistement », introduite par Freud dans son texte sur « La jeune homosexuelle ». Cette notion vaut alors, plus chez les post-freudien·nes que chez Freud, comme principe d’explication et de classification des « homosexualités », saisies dans leur rapport à l’Œdipe. Ainsi les « homosexualités », plurielles, sont-elles le plus habituellement conçues dans le cadre d’une défense contre l’hétérosexualité inassumable, singulière. La notion de désistement s’avère alors problématique et n’est pas sans soulever un certain nombre de questions. L’étude de son fonctionnement pourrait susciter ce qu’Éric Fassin nommait « inversion de la question homosexuelle ». L’auteur analyse cette notion telle qu’elle apparaît dans le texte freudien et dans ceux de certains de ses commentateur·rices contemporain·es, pour réfléchir sur l’usage de l’étiologie en psychanalyse et les fantasmes de genre et de sexualité qui peuvent la traverser.
Les mobilités dans les aires périurbaines du Grand Tunis. Étude de cas d’El Mornaguia
Authors: Bouzid Souhir 
Published: February 2022

Cet article analyse les conséquences d’une installation en périurbain à El Mornaguia – qui se situe dans la deuxième couronne périurbaine du Grand Tunis – sur les pratiques de mobilité, à partir d’une enquête par questionnaire auprès de 5 % des ménages (362 ménages) et des entretiens semi-directifs effectués avec des groupes spécifiques. Les conséquences de l’installation en périurbain à El Mornaguia sont étudiées tout d’abord sur l’ensemble des ménages et par la suite sur des groupes spécifiques de population, à savoir les aînés (60 ans et plus), les jeunes (12-18 ans) et les femmes seules. L’enquête montre que la mobilité quotidienne à El Mornaguia reflète des inégalités sociales. Elle est influencée également par l’âge dont l’effet intervient au début et à la fin du cycle de vie. Elle est influencée également par le genre puisque les hommes se déplacent plus que les femmes.
Comparaison des caractéristiques des organismes de transport en commun du Québec selon la ruralité : vers l’identification de nouvelles opportunités pour favoriser la participation sociale des aînés
Authors: Levasseur Mélanie , Naud Daniel , Routhier Sonia , Bruneau Jean-François 
Published: February 2022

Cette étude vise à décrire et à comparer, selon la ruralité, les caractéristiques du transport en commun régulier et adapté de municipalités québécoises. Une enquête transversale a été menée à l’aide d’un questionnaire en ligne auprès d’organismes de transport, de deux rapports d’activités et de données ouvertes. Réparti de façon représentative dans 573 (50,4 %) municipalités et arrondissements du Québec, un échantillon de 72 (43,9 %) organismes de transport a été considéré. Des inégalités ont été surtout identifiées pour le transport régulier. Les milieux métropolitains se distinguaient par des tarifs réduits, des distances inférieures entre les arrêts et un achalandage et une distance parcourue totale par kilomètre de route municipale supérieurs. En comparaison aux milieux métropolitains, les milieux urbain et rural présentaient un nombre inférieur de plaintes et offraient davantage de transports adaptés à tous les jours.
Les moins de 30 ans en Gironde : regards croisés entre insertion et RSA
Authors: Le Petit-Guerin Mehdi , Eljim Khalid 
Published: February 2022

Entre études supérieures, exclusion, intérim, chômage et réorientation, l’insertion professionnelle des jeunes est un processus de moins en moins linéaire et prévisible. Les récents débats autour de la « désincitation au travail » ont entraîné la refonte d’une partie du système de protection sociale en conditionnant l’aide publique à l’emploi, et ce de manière encore plus stricte lorsqu’il s’agit de l’octroyer à un(e) jeune de moins de 30 ans. Cette mutation de l’État social s’appuie sur une nouvelle perception de la solidarité dite « active », dont un des dispositifs les plus symboliques est le Revenu de solidarité active (RSA). En s’intéressant à la fois aux jeunes non-insérés et à ceux au RSA, dont les trajectoires relèvent de processus complexes, cette étude mêle données de contextualisation et suivi de cohorte afin de déterminer les récentes tendances de l’insertion des précaires de moins de 30 ans en Gironde1.
Ségrégations et parcours professionnalisés des sortants du supérieur
Authors: Lemistre Philippe 
Published: February 2022

Selon Pierre Merle, si les jeunes d’origine sociale modeste haussent leur niveau d’éducation, c’est vers les diplômes de filières et spécialités les moins à même de permettre un accès privilégié au marché du travail. C’est la « démocratisation ségrégative », dont cet article élargit le cadre aux sortants de l’enseignement supérieur, ceci en examinant le caractère ségrégatif des parcours d’études selon qu’ils comprennent des diplômés professionnels ou pas. La démocratisation ségrégative liée au parcours d’études suppose que, selon qu’ils soient professionnels ou non, les diplômes qui jalonnent ce parcours différencient la population en termes d’origine sociale et ont une influence sur la réussite au diplôme final, la poursuite d’étude et l’insertion. De fait, les investigations menées à partir de l’enquête du CEREQ de 2013 mettent en évidence le caractère ségrégatif des parcours professionnalisés.
Use of personal protective equipment by healthcare workers exposed to COVID-19 infection at a tertiary care hospital in a lower middle-income country
Authors: Jayatilleke SK , Mendis DM , Perera TPW , Manoj SS , Iresha GK , Buddhadasa PCLS , Hansani HCL 
Published: February 2022

Introduction: Data on PPE use and COVID-19 transmission in a healthcare setting is sparse.
Method: This study is a retrospective descriptive study on PPE use and Covid-19 transmission in a hospital. Data collected during routine risk assessment was analyzed using SPSS_26 software.
Results: A total of 108 COVID-19 positive patients were diagnosed in the hospital, of whom 17 were health care workers (HCW). Of the 108, 29 (26.9%) were asymptomatic. Aerosol generating procedures were performed in 10 events. Fifty three HCWs were quarantined for 14 days following exposure but only 4 developed the disease. Of the total 946 events, 945 had HCWs exposed within 1 metre to COVID-19 positive patients while one event had exposure to the equipment used on a patient. Of the 945 events within a 1 metre distance, attending HCWs wore respirators during 446 (47.1%) events. The source patient wore a mask only in 717 (75.9%) of the events. In 98 events, exposure was for more than 15 minutes. The Ct value of the source patient’s PCR was between 15.54 to 24.06 or RAT positive when the HCWs acquired the infection while it ranged from 23.28 to 33 when the contacts did not develop the disease. Not having a mask on by the source (p=0.014), >15 minutes exposure within 1m (p=0.03) and not having a face shield in addition to a mask (p=0.019) had significant association with COVID-19 transmission.
Conclusions: Acquiring COVID-19 infection in the hospital setting was uncommon (4/946) in spite of not using respirators during all healthcare exposures. In a quarter of the events, the source patients were not wearing a mask. Not having a mask on by the source (p=0.014), >15 minutes exposure within 1m (p=0.03) and not having a face shield in addition to a mask (p=0.019) had significant association with COVID-19 transmission.
Career Aspirations of Recent Graduates From Professional Master's-Level Athletic Training Programs
Authors: Barrett Jessica L. , Bowman Thomas G. , Singe Stephanie M. , Kilbourne Brianne F. 
Published: February 2022

Context
Transition to clinical practice is a topic receiving substantial attention. Many reports have focused on the educational program's role and have stopped short of identifying the impact of the initial year of employment on desire to persist and future career goals.

Objective
To examine the career aspirations of athletic trainers in their first year of employment who graduated from professional master's programs.

Design
Qualitative.

Setting
Nine professional master's athletic training programs, variety of employment settings.

Patients or Other Participants
Seven men and 7 women (age = 25.6 ± 3.7 years).

Data Collection and Analysis
A general inductive approach was used to analyze data from individual interviews conducted 6 and 12 months into the first year of clinical practice. Multiple-analyst triangulation and peer review ensured credibility.

Results
Graduates of professional master's programs in athletic training plan to stay in the profession. However, newly credentialed athletic trainers do not plan to remain with their initial employer beyond 2 years; 11 of 14 participants (79%) stated their first job was transitional. The first year of employment did not change participants' perceptions, as the graduates knew upon taking their first job that it would be temporary. Though participants planned to change jobs, most (79%) planned to continue to engage in clinical practice as athletic trainers.

Conclusions
Understanding newly credentialed athletic trainers' perceptions of the impact of the first year of employment can provide educators and employers important insight to assist in retention and persistence of young professionals. Graduates regard their first years of employment as impermanent. However, the majority do not wish to leave clinical practice. Participants viewed their first job as a way to gain valuable experience that did not dissuade them from continuing in the field. Recent graduates demonstrated ambitions to experience different work settings and higher-level positions with greater responsibilities.