bluuebunny/crossref_metadata_2025 huggingface dataset:
Detailed Abundances of Planet-hosting Open Clusters. The Praesepe (Beehive) Cluster*
Authors: Vejar George , Schuler Simon C. , Stassun Keivan G.
Published: September 2021

It is not yet fully understood how planet formation affects the properties of host stars, in or out of a cluster; however, abundance trends can help us understand this process. We present a detailed chemical abundance analysis of six stars in Praesepe, a planet-hosting open cluster. Pr0201 is known to host a close-in (period of 4.4 days) giant planet (mass of 0.54 M
J), while the other five cluster members in our sample (Pr0133, Pr0081, Pr0208, Pr0051, and Pr0076) have no detected planets according to measurements of radial velocity. Using high-resolution echelle spectra with high signal-to-noise ratio obtained with Keck/HIRES and a novel approach to measurements of equivalent width (XSpect-EW), we derived abundances of up to 20 elements spanning a range of condensation temperatures (T
C). We find a mean cluster metallicity of [Fe/H] = +0.21 ± 0.02 dex, in agreement with most previous determinations. We find most of our elements show an [X/Fe] scatter of ∼0.02–0.03 dex and conclude that our stellar sample is chemically homogeneous. The T
C slope for the cluster mean abundances is consistent with zero and none of the stars in our sample exhibit individually a statistically significant T
C slope. Using a planet engulfment model, we find that the planet host, Pr0201, shows no evidence of significant enrichment in its refractory elements when compared to the cluster mean that would be consistent with a planetary accretion scenario.
Mid-infrared Period–Luminosity Relations for Miras in the Large Magellanic Cloud
Authors: Iwanek Patryk , Soszyński Igor , Kozłowski Szymon
Published: September 2021

We present the mid-infrared (mid-IR) period–luminosity relations (PLRs) using over 1000 Mira variables in the Large Magellanic Cloud, for the four Wide-field Infrared Survey Explorer and the four Spitzer bands. These PLRs cover a mid-IR wavelength range from 3.4–22 μm and are presented separately for the oxygen-rich (O-rich) and carbon-rich (C-rich) Miras. These relations can be used to measure distances to individual O-rich and/or C-rich Mira stars with an accuracy of 5% and 12%, respectively. They are the most accurate Mira PLRs in the mid-IR to date.
Connecting the Low to the High Corona: A Method to Isolate Transients in STEREO/COR1 Images
Authors: Alzate Nathalia , Morgan Huw , Viall Nicholeen , Vourlidas Angelos
Published: September 2021

We present a method that isolates time-varying components from coronagraph and extreme ultraviolet images, allowing substreamer transients propagating within streamers to be tracked from the low to the high corona. The method uses a temporal bandpass filter with a transmission bandwidth of ∼2.5–10 hr that suppresses both high- and low-frequency variations in observations made by the STEREO/SECCHI suite. We demonstrate that this method proves crucial in linking features in the low corona, where the magnetic field is highly nonradial, to their counterparts in the high corona, where the magnetic field follows a radial path, through the COR1 instrument. We also apply our method to observations by the COR2 and EUVI instruments on board SECCHI and produce height–time profiles that reveal small density enhancements, associated with helmet streamers propagating from ∼1.2 R
⊙ out to beyond 5 R
⊙. Our processing method reveals that these features are common during the period of solar minimum in this study. The features recur on timescales of hours, originate very close to the Sun, and remain coherent out into interplanetary space. We measure the speed of the features and classify them as slow (a few to tens of kilometers per second) or fast (∼100 km s−1). Both types of features serve as an observable tracer of a variable component of the slow solar wind to its source regions. Our methodology helps overcome the difficulties in tracking small-scale features through COR1. As a result, it proves successful in measuring the connectivity between the low and high corona and in measuring the velocities of small-scale features.
Electron Acceleration at Rippled Low-mach-number Shocks in High-beta Collisionless Cosmic Plasmas
Authors: Kobzar Oleh , Niemiec Jacek , Amano Takanobu , Hoshino Masahiro , Matsukiyo Shuichi , Matsumoto Yosuke , Pohl Martin
Published: September 2021

Using large-scale fully kinetic two-dimensional particle-in-cell simulations, we investigate the effects of shock rippling on electron acceleration at low-Mach-number shocks propagating in high-β plasmas, in application to merger shocks in galaxy clusters. We find that the electron-acceleration rate increases considerably when the rippling modes appear. The main acceleration mechanism is stochastic shock-drift acceleration, in which electrons are confined at the shock by pitch-angle scattering off turbulence and gain energy from the motional electric field. The presence of multiscale magnetic turbulence at the shock transition and the region immediately behind the main shock overshoot is essential for electron energization. Wide-energy non-thermal electron distributions are formed both upstream and downstream of the shock. The maximum energy of the electrons is sufficient for their injection into diffusive shock acceleration. We show for the first time that the downstream electron spectrum has a power-law form with index p ≈ 2.5, in agreement with observations.
Broadband Variability Study of Maxi J1631-479 in Its Hard-intermediate State Observed with Insight-HXMT
Authors: Bu Q. C. , Zhang S. N. , Santangelo A. , Belloni T. M. , Zhang L. , Qu J. L. , Tao L. , Huang Y. , Ma X. , Li Z. S. , Zhang S. , Chen L. ,   and the Insight-HMXT collaboration:, Cai C. , Cao X. L. , Chang Z. , Chen T. X. , Chen Y. , Chen Y. P. , Cui W. W. , Du Y. Y. , Gao G. H. , Gao H. , Ge M. Y. , Gu Y. D. , Guan J. , Guo C. C. , Han D. W. , Huo J. , Jia S. M. , Jiang W. C. , Jin J. , Kong L. D. , Li B. , Li C. K. , Li G. , Li T. P. , Li W. , Li X. , Li X. B. , Li X. F. , Li Z. W. , Liang X. H. , Liao J. Y. , Liu C. Z. , Liu H. X. , Liu H. W. , Liu X. J. , Lu F. J. , Lu X. F. , Luo Q. , Luo T. , Ma R. C. , Meng B. , Nang Y. , Nie J. Y. , Ou G. , Sai N. , Song L. M. , Song X. Y. , Sun L. , Tan Y. , Tuo Y. L. , Wang C. , Wang L. J. , Wang P. J. , Wang W. S. , Wang Y. S. , Wen X. Y. , Wu B. Y. , Wu B. B. , Wu M. , Xiao G. C. , Xiao S. , Xiong S. L. , Xu Y. P. , Yang S. , Yang Y. J. , Yi Q. B. , Yin Q. Q. , You Y. , Zhang F. , Zhang H. M. , Zhang J. , Zhang P. , Zhang W. C. , Zhang W. , Zhang Y. F. , Zhang Y. H. , Zhao H. S. , Zhao X. F. , Zheng S. J. , Zhou D. K.
Published: September 2021

We report the energy-resolved broadband timing analysis of the black hole X-ray transient MAXI J1631-479 during its 2019 outburst from February 11 to April 9, using data from the Insight−Hard X-ray Modulation Telescope (Insight-HXMT), which caught the source from its hard-intermediate state to the soft state. Thanks to the large effective area of Insight-HXMT at high energies, we are able to present the energy dependence of fast variability up to ∼100 keV. Type-C quasi-periodic oscillations (QPOs) with a frequency varying between 4.9 and 6.5 Hz are observed in the 1–100 keV energy band. While the QPO fractional rms increases with photon energy from 1 keV to ∼10 keV and remains more or less constant from ∼10 keV to ∼100 keV, the rms of the flat-top noise first increases from 1 keV to ∼8 keV and then drops to less than 0.1% above ∼30 keV. We suggest that the disappearance of the broadband variability above 30 keV could be caused by the nonthermal acceleration in the Comptonizing plasma. At the same time, the QPOs could be produced by the precession of either a small-scale jet or a hot inner flow model.
Effect of Dust Rotational Disruption by Radiative Torques and Implications for the F-corona Decrease Revealed by the Parker Solar Probe
Authors: Hoang Thiem , Lazarian Alex , Lee Hyeseung , Cho Kyungsuk , Gu Pin-Gao , Ng Chi-Hang
Published: September 2021

The first-year results from the Parker Solar Probe (PSP) reveal a gradual decrease of F-coronal dust from distances of D = 0.166–0.336 au (or the inner elongations of ∼9.22–18.69 R
⊙) to the Sun. Such an F-corona decrease cannot be explained by the dust sublimation scenario of the popular silicate composition that implies a dust-free boundary zone at heliocentric radius R ≲ 4–5 R
⊙, but it may be explained by appealing to various dust compositions with different sublimation fronts. In this paper, we present an additional explanation for the F-corona decrease using our newly introduced mechanism of dust destruction, the so-called Radiative Torque Disruption (RATD) mechanism. We demonstrate that the RATD rapidly breaks large grains into nanoparticles so that they can be efficiently destroyed by nonthermal sputtering induced by the bombardment of energetic protons from slow solar winds, which extends the dust-free zone established by thermal sublimation to R
dfz ∼ 8 R
⊙. Beyond this extended dust-free zone, we find that the dust mass decreases gradually from R ∼ 42 R
⊙ toward the Sun due to partial removal of nanodust by nonthermal sputtering. The joint effect of the RATD and nonthermal sputtering can successfully reproduce the gradual decrease of the F-corona between 19 and 9 R
⊙ observed by the PSP. Finally, the RATD mechanism can efficiently produce nanoparticles usually observed in the inner solar system.
The Role of Complex Ionized Absorbers in the Soft X-Ray Spectra of Intermediate Polars
Authors: Islam Nazma , Mukai Koji
Published: September 2021

In magnetic cataclysmic variables (mCVs), X-ray radiation originates from a shock-heated, multi-temperature plasma in the post-shock region near the white dwarf’s surface. These X-rays are modified by a complex distribution of absorbers in the pre-shock region. The presence of photoionized lines and warm absorber features in the soft X-ray spectra of these mCVs suggests that these absorbers are ionized. We developed the ionized complex absorber model zxipab, which is represented by a power-law distribution of ionized absorbers in the pre-shock flow. Using the ionized absorber model zxipab along with a cooling flow model with a reflection component, we model the broadband Chandra/High-Energy Transmission Grating (HETG) and Nuclear Spectroscopic Telescope Array (NuSTAR) spectra of two intermediate polars (IPs): NY Lup and V1223 Sgr. We find that this model describes well many of the H- and He-like emission lines from medium-Z elements, which arise from a collisionally excited plasma. However the model fails to account for some of the He-like triplets from the medium-Z elements, which points toward their photoionized origin. We do not find compelling evidence for a blackbody component to model the soft excess seen in the residuals of the Chandra/HETG spectra, which could be due to uncertainties in the estimation of the interstellar absorption of these sources using the Chandra/HETG data and/or excess fluxes seen in some photoionized emission lines which are not accounted for by the cooling flow model. We describe the implications of this model with respect to the geometry of the pre-shock region for these two IPs.
Fast Radio Bursts and Their High-energy Counterparts from Magnetar Magnetospheres
Authors: Yang Yuan-Pei , Zhang Bing
Published: September 2021

The recent discovery of a Galactic fast radio burst (FRB) occurring simultaneously with an X-ray burst (XRB) from the Galactic magnetar SGR J1935+2154 implies that at least some FRBs arise from magnetar activities. We propose that FRBs are triggered by crust fracturing of magnetars, with the burst event rate depending on the magnetic field strength in the crust. Since the crust-fracturing rate is relatively higher in polar regions, FRBs are more likely to be triggered near the directions of multipolar magnetic poles. Crust fracturing produces Alfvén waves, forming a charge-starved region in the magnetosphere and leading to nonstationary pair plasma discharges. An FRB is produced by coherent plasma radiation due to nonuniform pair production across magnetic field lines. Meanwhile, the FRB-associated XRB is produced by the rapid relaxation of the external magnetic field lines. In this picture, the sharp-peak hard X-ray component in association with FRB 200428 is from a region between adjacent trapped fireballs, and its spectrum with a high cutoff energy is attributed to resonant Compton scattering. The persistent X-ray emission is from a hot spot heated by the magnetospheric activities, and its temperature evolution is dominated by magnetar surface cooling. Within this picture, magnetars with stronger fields tend to produce brighter and more frequent repeated bursts.
Changes in Pediatric Fracture Cases during the Coronavirus Disease 2019 Pandemic: Data from a National Referral Orthopedic Hospital in Indonesia
Authors: Utomo Pamudji , Wirawan Muhammad Yogatama , Kumara Hendra Cahya , Yudistira Mochamadsyah Beizar
Published: September 2021

AIM: This study aims to compare the impact of coronavirus disease 2019 (COVID-19) on pediatric fracture services in a national referral orthopedic hospital in Indonesia to understand the service provisions that may be required during the pandemic.

METHODS: The study compared the population group during 1 year of the COVID-19 pandemic in Indonesia to the same period 1 year before. This cross-sectional study was performed in Prof. Dr. R Soeharso Orthopedic Hospital, Surakarta, Indonesia, from March 2019 to February 2021. The subjects were pediatric fracture patients aged 0–18 years. Patients recorded on other orthopedic service support installations such as radiology, laboratory, or physiotherapy and diagnosed with any other orthopedic sub-specialty were excluded.

RESULTS: A total of 1787 patients were recorded in this study, with the mean of pediatric fracture patients during the pre-COVID-19 period was 90.75 (standard deviation [SD]: 28.5) and during the COVID-19 period was 58.16 (SD: 19.17) monthly. In the 1st year of the pandemic, there was a significant reduction in clinical visits compared to the same period in 2019 (p < 0.005).

CONCLUSION: There were significant differences in pediatric fracture cases clinic visits and patients’ length of stay in the COVID-19 period than before the COVID-19 occurred.
Idea of an experimental technique for quantitative passive gamma emission tomography on irradiated nuclear fuel assemblies
Authors: Jansson Peter
Published: September 2021

An idea is presented in which passive gamma emission tomography of irradiated nuclear fuel is developed to enable quantitative information of the spatial activity distribution of selected isotopes within the fuel rods of the assembly. The idea is based on using well-known calibration sources mounted in the measurement device during measurement. The image reconstruction would include the sources, thereby enable quantification of the activity distribution. Should the idea be proven viable, the outcome would be valuable to the global community dealing with characterisation of nuclear fuel in terms of safety, security, safeguards and fuel development.
„Festzertrümmerung“. Literaturpreise und Ritualbrüche
Authors: Braun Michael
Published: September 2021

Chaque année, plus de 700 prix littéraires sont décernés en Allemagne. Ils sont des repères dans le milieu littéraire, mais font aussi l’objet de critiques (on leur reproche de représenter une promotion excessive, une instrumentalisation politique, une entrave à la liberté artistique). Un prix littéraire peut « faire » un auteur (prix Büchner pour Durs Grünbein en 1995, dernière sélection du prix du livre allemand 2015 pour Daniel Kehlmann) et rendre un genre littéraire plus populaire (prix Büchner à Elke Erb et prix Nobel à Louise Glück en 2020). L’article examine, dans une perspective de théorie des rituels, les prix littéraires dans la culture de la présence d’un « large présent » (Gumbrecht) : comment ils sont représentés dans le récit satirique ( Preisverleihung , 1972, de Günter de Bruyn, Das bin doch ich , 2007 de Thomas Glavinic) et comment ils sont mis en scène comme ruptures rituelles dans les discours de remise de prix ( Meine Preise , 2009, de Thomas Bernhard, Verunstaltung durch Veranstaltung , 1993, de Hans Magnus Enzensberger, discours de réception, par Martin Walser, du prix de la Paix des Libraires allemands en 1998). Les ruptures rituelles dans les cérémonies de remise de prix littéraires tant fictives que réelles instaurent des frontières dans le champ de la littérature contemporaine.
Anita Brookner and the Servants: Power Struggles and British Jewish Domestic Spaces in her Early Fiction
Authors: Stetz Margaret D.
Published: September 2021

Quoique le service domestique ait disparu en tant qu’institution après la Seconde Guerre mondiale, il n’en reste pas moins un élément majeur dans les romans qu’Anita Brookner publia au début des années 1980, tout comme dans l’œuvre d’avant-guerre de Virginia Woolf. Cependant, le rôle joué par le personnel de maison, notamment féminin, chez Brookner n’est pas une survivance uniforme du passé, ni le signe d’une forme de nostalgie envers les hiérarchies sociales de l’époque de Woolf, mais plutôt un rôle ambigu, instable et déconcertant. Maîtres et serviteurs sont liés par des relations d’hostilité et de dévouement, mais aussi d’amour, de dépendance et de tensions inter-générationnelles qui reflètent les dynamiques familiales compliquées dans lesquelles évoluent les protagonistes de Brookner. Compliquant encore les relations entre ces serviteurs et leurs maîtresses, dans la fiction, se trouve l’identité juive de ces dernières. Brookner déploie tout un réseau métaphorique autour de l’occupation et du confinement d’une part, et du déplacement d’autre part, qui permet de lire, derrière les conflits de pouvoir entre maîtres et serviteurs pour le contrôle de l’espace domestique, de nombreuses allusions à la situation historique des Juifs européens au xx e  siècle.
Analyse multi-niveau de l’effet du climat diversité sur l’identification organisationnelle – Importance de la perception d’« insider »
Authors: Cachat-Rosset Gaëlle , Klarsfeld Alain , Carillo Kevin
Published: September 2021

Un climat pro-diversité serait primordial pour bénéficier des effets positifs de la diversité croissante des équipes de travail (Cox, 1993). Parmi ses effets positifs escomptés, figure le renforcement des états affectifs des salariés, et notamment leur identification à l’organisation. Nous proposons dans cet article d’apprécier l’influence de la perception de climat diversité de l’unité de travail sur l’identification organisationnelle, relation encore peu explorée et aux résultats mitigés, a fortiori dans le contexte français, dans lequel le climat diversité n’a fait l’objet d’aucune recherche empirique. Nous conceptualisons le climat diversité en 3 dimensions que sont l’intentionnalité, la programmation et la praxis (Cachat-Rosset et al ., 2019), répondant ainsi aux incohérences théoriques, conceptuelles et opérationnelles récemment soulevées à propos de ce concept (Cachat-Rosset et al ., 2019 ; McKay & Avery, 2015). S’appuyant sur une étude administrée auprès de salariés français dans 40 unités de travail, nos résultats montrent que la perception d’un climat diversité au sein de l’unité de travail influence positivement et significativement la perception d’« insider » et l’identification organisationnelle, et qu’il y a médiation de la perception d’« insider » dans la relation climat diversité - identification organisationnelle.
La surveillance a-t-elle une couleur politique ? Cercles de vigilance, capital social et compétition municipale dans des espaces périurbains en France
Authors: Gardenier Matthijs
Published: September 2021

Depuis 2011 et la circulaire Guéant sur la « participation citoyenne », nous assistons en France au développement des Voisins Vigilants , sur le modèle des neighbourhood watches américaines et britanniques. Le concept est simple : il s’agit d’organiser un réseau de voisin·es qui avertiraient la police lorsque des actes délictueux seraient commis dans leur quartier. Situés principalement dans le périurbain résidentiel, ces cercles cibleraient principalement les cambriolages, dans des quartiers où il y a peu de monde pendant la journée. Les Voisins Vigilants n’auraient pas vocation à intervenir contre des délits, mais à mettre en place une surveillance, matérialisée par le logo du mouvement, un œil grand ouvert sur fond jaune. Au cours d’une enquête de terrain dans sept communautés différentes, nous observons que ces réseaux s’inscrivent dans la perspective de créer un espace social perçu par les participant·es comme sécurisé, pouvant devenir un outil d’affirmation de l’entre-soi. Cette vision partagée sera aussi pour certains acteurs l’occasion d’accumuler un capital social leur permettant de s’intégrer au jeu électoral des localités où se développent ces réseaux de surveillance.
Démocratiser le fusil. L’imagination composite d’une citoyenneté coercitive en Ouganda
Authors: Brisset-Foucault Florence
Published: September 2021

Lorsqu’elles prennent le pouvoir en Ouganda en 1986, les nouvelles élites politiques du Mouvement de résistance nationale (NRM) promeuvent un modèle de citoyenneté refondée au nom duquel les citoyen·nes doivent prendre en charge leur sécurité. Cet article reconstitue l’épaisseur sociale et historique des conceptions du civisme et de l’appartenance qui s’expriment à travers la participation à l’ordre en articulant plusieurs échelles : transnationale, nationale, régionale et locale. Si ces dispositifs ont été très critiqués du fait de la violence dont ils sont la source, ils peuvent aussi être le support de la production de communautés morales. Loin d’être antagoniques, les conceptions de l’ordre et de la citoyenneté exprimées et produites par le bas et par le haut à travers la participation à l’ordre se rejoignent dans l’élaboration d’un idéal du village comme berceau de la production de personnes civiques.
Retour de la haute intensité : comment résoudre le dilemme entre masse et technologie ?
Authors: Toutain Xavier
Published: September 2021

Avec la perspective du retour de la haute intensité, et alors que l’actualisation stratégique a confirmé la pertinence d’un modèle complet d’armée, une remontée en puissance s’impose : il s’agit de pouvoir agir avec succès dans un environnement contesté en maîtrisant l’attrition, et d’opérer un effet d’entraînement sur nos partenaires. Retrouver une masse critique suffisante, sans renoncer aux technologies de rupture, n’est pas un objectif irréaliste. D’abord, le rendement de la masse opérationnelle peut être optimisé. Ensuite, des marges de manœuvre peuvent être trouvées, avec une approche équilibrée de la technologie, le retour à une certaine différenciation capacitaire, et une recherche de plus grandes synergies à l’international.
Aux armes citoyens !
Authors: de Monicault Jean
Published: September 2021

Quelle forme prendrait aujourd’hui une « mobilisation générale » ? Depuis la suspension de la conscription, la mobilisation de masse n’est plus d’actualité. Les menaces contemporaines sont davantage hybrides, plus complexes. Les crises sont multiformes et appellent des besoins dans des champs dépassant la stricte sécurité. Elles touchent de nouveaux domaines dans lesquels les moyens de l’État sont parfois très inférieurs à ceux du privé. Une réflexion est donc nécessaire pour une meilleure coordination et coopération entre la puissance publique et les acteurs privés. Chercher à lever les freins organisationnels, culturels et normatifs est autant un enjeu opérationnel de gestion de crise qu’un impératif d’unité nationale et de cohésion sociale.
Puissance publique et santé environnementale en France : ruptures et mutations dans la longue durée
Authors: Griset Pascal
Published: September 2021

La question de la santé environnementale s’inscrit dans la longue durée. Trois périodes peuvent être distinguées pour comprendre comment cette question, se situant à la convergence de multiples domaines, devient un enjeu sociétal de tout premier plan : tout d’abord, le temps de l’industrialisation et de la « Révolution pastorienne », qui voit un développement symétrique de la connaissance et une perception plus forte des pollutions et des dangers liés à l’utilisation de certains produits ; et, ensuite, la seconde moitié du XX e  siècle, où l’affirmation des technosciences permet d’envisager la santé humaine de manière différente. Avec les vaccins et les antibiotiques, la médecine semble entrer dans un âge d’or. Les questions d’environnement, qui sont par ailleurs prises en compte de manière de plus en plus forte, ne sont que rarement connectées explicitement à des questions de santé publique. Enfin, à partir des années 1980, ce « tournant environnemental » concerne de manière croissante la santé. Ce qui n’était pas détecté ou était négligé est désormais étudié et quantifié. La médecine intègre de manière croissante les risques environnementaux dans l’ensemble des espaces de vie, y compris le lieu de travail.
Changement climatique ou changement global, il faut choisir pour la santé !
Authors: Guégan Jean-François
Published: September 2021

Les changements climatiques constituent une composante importante des changements globaux. Or, les effets propres à ces changements climatiques sur l’évolution des maladies infectieuses et parasitaires restent difficiles à évaluer. D’autres facteurs notamment démographiques, environnementaux, socio-économiques et sociétaux interviennent et sont, dans la plupart des situations, prépondérants dans l’évolution actuelle et future de ces maladies.
Réglementation des substances chimiques : science et décision, lenteur et confusion
Authors: Huc Laurence , Barouki Robert
Published: September 2021

Dans les relations riches et complexes existant entre science, société et décision publique, la réglementation des substances chimiques tient une place tout à fait éminente. À travers les exemples de la cancérogénicité des substances chimiques, de la perturbation endocrinienne et du concept d’exposome, nous discuterons dans cet article de la mécanique de la relation entre science et réglementation, en observant que le délai entre l’acquisition des connaissances scientifiques et leur prise en compte dans la réglementation semble très long.
Santé-environnement : illustration de la politique du ministère de la Santé en matière de protection de la santé de la population face aux enjeux de notre société
Authors: Salomon Jérôme , Carmès Joëlle , Merlo Mathilde
Published: September 2021

Depuis plus d’un siècle, le ministère chargé de la Santé s’attache à protéger la santé des populations à travers une politique de prévention, de promotion et d’accès aux soins pour tous. La santé-environnement est au cœur de cette politique. Elle se caractérise par des attentes sociétales de plus en plus fortes, des modes de vie et des connaissances scientifiques en constante évolution, notamment dans le contexte du changement climatique. Au travers de quatre exemples, cet article illustre cette politique en adaptation permanente pour répondre aux enjeux de notre société et aux interactions étroites entre notre santé et notre environnement, incluant la santé des animaux et celle des écosystèmes.
Identification des conditions de réussite d’une transmission d’entreprise : le cas de l’Owner Buy Out (OBO)
Authors: Meniaoui Jihène , Ben Larbi Sami , Bon Véronique
Published: September 2021

En adoptant un cadre théorique s’inscrivant dans le champ de la transmission-reprise d’entreprise, notre article cherche à identifier les caractéristiques de l’Owner Buy Out (OBO) et les facteurs spécifiques qui contribuent à la réussite de la phase de transition au cours de laquelle cédant et repreneur potentiel cohabitent et interagissent sous la houlette d’un capital-investisseur. Notre recherche, composée d’une réflexion théorique complétée par une étude qualitative exploratoire et inédite menée auprès de 13 investisseurs spécialisés dans les opérations de capital transmission, met en évidence au travers d’une série de propositions les conditions de réussite inhérentes à un OBO favorisant le désengagement du cédant et la socialisation du repreneur, rejoignant en cela les recommandations académiques les plus récentes (Deschamps, 2018).
Traitement socialement responsable des contrats à durée déterminée (CDD) au travers de la formation professionnelle : impact sur la productivité de l’entreprise
Authors: Giuliano Romina
Published: September 2021

L’objectif de cette recherche est de déterminer l’impact d’une pratique de GRH socialement responsable sur la productivité de l’entreprise. Dès lors, nous essayons de vérifier l’hypothèse selon laquelle traiter les CDD de manière socialement responsable au travers de la formation professionnelle, devrait avoir un impact bénéfique sur la productivité de l’entreprise. Pour ce faire, nous avons réalisé une analyse quantitative sur base d’un échantillon d’entreprises belges, portant sur la période 2012-2016, constitué à partir de la base de données Bel-First. De cette façon, nous avons abouti à un échantillon global de 41.990 observations.
On $ \psi $-Hilfer generalized proportional fractional operators
Authors: Mallah Ishfaq ,   Department of Mathematics, Maulana Azad National Urdu University Gachibowli, Hyderabad-500032, India, Ahmed Idris , Akgul Ali , Jarad Fahd , Alha Subhash ,   Department of Mathematics, Sule Lamido University, P. M. B 048 Kafin Hausa, Jigawa State, Nigeria,   Department of Mathematics, Art and Science Faculty, Siirt University, TR-56100 Siirt, Turkey,   Department of Mathematics, Cankaya University, 06790 Etimesgut, Ankara, Turkey,   Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
Published: September 2021

In this paper, we introduce a generalized fractional operator in the setting of Hilfer fractional derivatives, the $ \psi $-Hilfer generalized proportional fractional derivative of a function with respect to another function. The proposed operator can be viewed as an interpolator between the Riemann-Liouville and Caputo generalized proportional fractional operators. The properties of the proposed operator are established under some classical and standard assumptions. As an application, we formulate a nonlinear fractional differential equation with a nonlocal initial condition and investigate its equivalence with Volterra integral equations, existence, and uniqueness of solutions. Finally, illustrative examples are given to demonstrate the theoretical results.
Psychological Constructs and Dysfunctional Eating in Pakistani University Students
Authors: Hussain Maryam
Published: September 2021

The present study aims to test a model that seeks to explain how Parental Bonding and Loneliness may be responsible in the development of Dysfunctional Eating Patterns such as Cognitive Restraint, Emotional Eating, Uncontrolled Eating, Drive toward Thinness, Bulimia and Dissatisfaction with Body Image. It was further hypothesized that Metacognitions, Core beliefs and Meta-Emotions would mediate between Loneliness, Parental Bonding, and the aforementioned Dysfunctional Eating Patterns. Correlational research design has been used. A sample of 210 university students was selected from government and private universities. Urdu translated versions of UCLA Loneliness Scale (Version 3), Three Factor Eating Questionnaire-R-18, Eating Disorders Inventory-3, Parental Bonding Inventory, Beliefs about Emotions Scale, Eating Disorders Belief Questionnaire and Metacognitions Questionnaire were used for assessment purposes. Correlational Analysis, and Multiple Hierarchical Regression were used to analyze the data. Almost all dimensions of Parental Bonding showed significant relationship with some patterns of Dysfunctional Eating. Loneliness did not show any significant correlation with Dysfunctional Eating. None of the hypothesized mediators(Metacognitions, Meta-Emotions and Core Beliefs) mediated the relationship between Parental Bonding dimensions and patterns of Dysfunctional Eating, yet some interesting relationships emerged. The findings of this research can help in understanding the cultural differences between East and West. Possible reasons why results could not support the previous literature are discussed.  
Examinando a relação entre proximidade espacial e integração socioeconômica em dois bairros populares de Salvador, Brasil
Authors: Treuke Stephan
Published: September 2021

A construção de condomínios fechados de elite nas áreas periféricas das cidades latinoamericanas instigou um debate controvertido centrado na questão se este desdobramento favorece a integração socioeconômica das camadas baixas habitando estas regiões. Neste trabalho, visa-se investigar sob quais condições o efeito-território, acometendo a população pobre do bairro central Calabar e do bairro periférico Vila Verde, Salvador, Brasil, se vê influenciado pela proximidade aos condomínios da classe alta. À base de entrevistas, evidencia-se que existem tanto mecanismos que prejudicam o indivíduo, como a influência do tráfico de drogas, quanto mecanismos que beneficiam sua vida, como a mobilização coletiva da comunidade. Discute-se que as articulações funcionais entre os grupos socialmente distantes sofreram importantes alterações dentro da trajetória de expansão da classe média e alta, sendo que a relação entre proximidade e integração socioeconômica se vê condicionada pela existência de espaços públicos, pela autonomia funcional do bairro e pelo impacto do crime. Conclui-se que a recente construção do condomínio Alphaville 2 não ampliou as possibilidades de articulação social com os segmentos mais pobres morando no bairro Vila Verde, dada sua maior autonomia funcional e seu maior grau de isolamento espacial. Tampouco criou externalidades positivas para a população do seu entorno geográfico em termos de acesso a serviços urbanos e de segurança pública, em contraste com o bairro de Calabar.
Educação a distância e formação de professores de Sociologia: cenários e desafios
Authors: Santos Priscilla Ribeiro dos , Besen Lucas Riboli
Published: September 2021

Este artigo tem por objetivo analisar o panorama de expansão da formação docente em Ciências Sociais e Sociologia na modalidade a distância no Brasil. Na interface dos estudos sobre o ensino superior com a literatura especializada sobre a formação docente nas Ciências Sociais, argumentamos que os fatores que contribuíram para a expansão de licenciaturas a distância em Ciências Sociais e Sociologia vão além do retorno de sua obrigatoriedade no currículo escolar e remetem ao crescimento da atuação de grupos educacionais privados com fins lucrativos, à flexibilização da legislação para o ensino a distância, aos efeitos da crise econômica e à tentativa por parte do Governo Federal em diversificar e interiorizar a oferta de ensino superior nas duas últimas décadas. Com base na revisão bibliográfica e na análise dos dados provenientes do Cadastro Nacional de Cursos e Instituições de Educação Superior, verificamos que a dinâmica de adesão ao ensino à distância varia de acordo com a área de licenciatura. Nas Ciências Sociais e Sociologia, as instituições de ensino superior privadas respondem por 42 licenciaturas em atividade, totalizando 92% das matrículas. A atuação das instituições públicas na EAD é bastante reduzida, com apenas quatro cursos em atividade pelo Sistema Universidade Aberta do Brasil.
Cartografia das controvérsias em torno do termo ‘comuna vírus’ no YouTube: contrastes com a Política Externa de Bolsonaro
Authors: Alves Oliveira Felipe , Fenerick Junior José
Published: September 2021

Por meio da linguagem Python, foram coletados os resultados da pesquisa sobre o termo “Comuna Vírus” na plataforma YouTube. A partir destes dados, o artigo tem como objetivo cartografar as controvérsias em torno do termo e demonstrar as consonâncias entre os conteúdos na plataforma e a política externa do governo Bolsonaro. Aliado à análise de conteúdo e à análise de similitude, encontramos duas grandes comunidades discursivas que se antagonizam dentro do corpus. Uma é formada pelos discursos ao redor da ideia de Brasil enquanto nação, pátria a ser protegida, e/ou território em disputa. E uma outra, caracterizada por uma tríade que é, ao mesmo tempo, uma ameaça sino-comunista e patogênica, a qual gera infecção viral e política. Assim, desde ambas grandes comunidades discursivas, reconstruímos seus percursos até à macro política, contrastando nossos resultados com as mais recentes análises da política externa do governo Bolsonaro, compreendendo a atuação exterior deste como dinâmica que visa agradar a opinião pública, em especial suas bases reacionárias, mantendo seu contínuo movimento de formação de grupo apoiador do governo.
Recommendation System
Authors: Baali Safia
Published: September 2021

The most challenging problem in human resources specially in the IT digital services company, is to assign the best collaborator’s in the adequate project , then ensure the delivery’s performance.in this paper we aim to develop à recommandation System using based-content and collaborative filtering in order to recommend potential profiles for a new job offer. The Principal parts of this recommandation is the matching between job offer of new project and collaborators profiles and the scoring using AHP method. In the first step we propose a model of criteria to measure collective skills , we validate by a survey realized in the IT service company , we analyze the data collected using PCA method (Principal Component Analysis).the results indicate six factors to measure collective skills of each collaborator (Technical skill, Proactivity ,Integrity, Cooperation, Communication and Benevolence/Interpersonal Relationship), these factors are used in AHP function to give score for each collaborator then allow the recommendation for the adequate project.
Malware Detection in Android Apps Using Static Analysis
Authors: Paul Nishtha , Bhatt Arpita Jadhav , Rizvi Sakeena , Shubhangi
Published: September 2021

Frequency of malware attacks because Android apps are increasing day by day. Current studies have revealed startling facts about data harvesting incidents, where user’s personal data is at stake. To preserve privacy of users, a permission induced risk interface MalApp to identify privacy violations rising from granting permissions during app installation is proposed. It comprises of multi-fold process that performs static analysis based on app’s category. First, concept of reverse engineering is applied to extract app permissions to construct a Boolean-valued permission matrix. Second, ranking of permissions is done to identify the risky permissions across category. Third, machine learning and ensembling techniques have been incorporated to test the efficacy of the proposed approach on a data set of 404 benign and 409 malicious apps. The empirical studies have identified that our proposed algorithm gives a best case malware detection rate of 98.33%. The highlight of interface is that any app can be classified as benign or malicious even before running it using static analysis.
The Loss of H3K27 Histone Demethylase Utx in T Cells Aggravates Allergic Contact Dermatitis
Authors: Inoue Takashi , Omori-Miyake Miyuki , Maruyama Saho , Okabe Masataka , Kuwahara Makoto , Honda Hiroaki , Miura Hiromasa , Yamashita Masakatsu
Published: September 2021

The pathogenesis of allergic contact dermatitis (ACD) requires the activation of Ag-specific T cells, including effector and regulatory T cells. The differentiation and function of these T cells is epigenetically regulated through DNA methylation and histone modifications. However, the roles of altered histone H3K27 methylation in T cells in the development of ACD remain unknown. Two types of histone H3K27 demethylases, Utx and Jmjd3, have been reported in mammals. To determine the role of the histone H3K27 demethylase expression of T cells in the development of ACD, we generated T cell–specific, Utx-deficient (Utx KO) mice or Jmjd3-deficient (Jmjd3 KO) mice. Unlike control mice, Utx KO mice had severer symptoms of ACD, whereas Jmjd3 KO mice showed symptoms identical to those in control mice. In Utx KO mice with ACD, the massive infiltration of myeloid cells, including neutrophils and dendritic cells, has been observed. In addition, the expression of proinflammatory cytokines in CD4+ T cells of the draining lymph nodes (LNs) and in CD8+ T cells of the skin was increased in Utx KO mice, whereas the ratio of Foxp3+ regulatory CD4+ T cells to Foxp3− conventional CD4+ T cells was decreased in both the draining LNs and the skin of Utx KO mice with ACD. Furthermore, Foxp3+ regulatory CD4+ T cells of Utx KO mice with ACD expressed a decreased level of CCR4 (a skin-tropic chemokine receptor) in comparison with control. Thus, in CD4+ T cells, Utx could potentially be involved in the regulation of the pathogenesis of ACD.
Lymphocyte Activation Gene-3 Regulates Dendritic Cell Metabolic Programing and T Cell Priming Function
Authors: Garcia Cruz Dunia , Giri Raghavendra R , Gamiotea Turro Daylin , Balsbaugh Jeremy L , Adler Adam J , Rodriguez Annabelle
Published: September 2021

Deficiency of lymphocyte activation gene-3 (LAG3) is significantly associated with increased cardiovascular disease risk with in vitro results demonstrating increased TNF-α and decreased IL-10 secretion from LAG3-deficient human B lymphoblasts. The hypothesis tested in this study was that Lag3 deficiency in dendritic cells (DCs) would significantly affect cytokine expression, alter cellular metabolism, and prime naive T cells to greater effector differentiation. Experimental approaches used included differentiation of murine bone marrow–derived DCs (BMDCs) to measure secreted cytokines, cellular metabolism, RNA sequencing, whole cell proteomics, adoptive OT-II CD4+Lag3+/+ donor cells into wild-type (WT) C57BL/6 and Lag3−/− recipient mice, and ex vivo measurements of IFN-γ from cultured splenocytes. Results showed that Lag3−/− BMDCs secreted more TNF-α, were more glycolytic, used fewer fatty acids for mitochondrial respiration, and glycolysis was significantly reduced by exogenous IL-10 treatment. Under basal conditions, RNA sequencing revealed increased expression of CD40 and CD86 and other cytokine-signaling targets as compared with WT. Whole cell proteomics identified a significant number of proteins up- and downregulated in Lag3−/− BMDCs, with significant differences noted in exogenous IL-10 responsiveness compared with WT cells. Ex vivo, IFN-γ expression was significantly higher in Lag3−/− mice as compared with WT. With in vivo adoptive T cell and in vitro BMDC:T coculture experiments, Lag3−/− BMDCs showed greater T cell effector differentiation and proliferation, respectively, compared with WT BMDCs. In conclusion, Lag3 deficiency in DCs is associated with an inflammatory phenotype that provides a plausible mechanism for increased cardiovascular disease risk in humans with LAG3 deficiency.
Platypnea orthodeoxia syndrome in a patient with patent foramen ovale and normal atrial pressure. Case report and presentation of underlying pathophysiological mechanisms
Authors: Sampsonas Fotios , Katsaras Matthaios , Papaioannou Ourania , Karampitsakos Theodoros , Lakkas Lampros , Michalis Lampros K. , Tzouvelekis Argyrios
Published: September 2021

Platypnea-orthodeoxia Syndrome is characterized by clinically significant postural hypoxia. The full spectrum of the syndrome includes intracardial and extracardial abnormalities with R->L shunt. Various concurrent underlying physiological abnormalities are usually encountered that require thorough clinical and laboratory evaluation. A high clinical suspicion in patients with unexplained dyspnea is also required to reach a firm diagnosis. We herein present a rare case of an 82-years-old patient with episodic unexplained dyspnea, patent foramen ovale with normal pulmonary pressures and we review the underlying physiologic mechanisms.
A giant mediastinal teratoma: From diagnosis to complete resection and restitutio ad integrum
Authors: Cocchia Rosangela , Guggino Gianluca , Romano Luigia , Annunziata Roberto , Raucci Antonio , Sorice Mario , Ranieri Brigida , Russo Giuseppe , Mauro Ciro , Bossone Eduardo
Published: September 2021

The current report highlights the integrated work-up of an unexpected giant mediastinal teratoma in 28 years old female. A comprehensive multi-modality imaging approach was implemented in order to define the diagnosis and tailor the most appropriate surgical intervention.
Contralateral pneumothorax after central line placement in COVID-19 positive patients
Authors: Swezey Elizabeth , Oster Scott , McGhee Kathryn , Edgecombe Luke , DiGiacomo Jody , Angus L. D. George
Published: September 2021

Contralateral pneumothorax after percutaneous central venous catheter placement has not been previously reported. Three patients who required intubation and mechanical ventilation for acute respiratory failure due to COVID-19 were identified with a new pneumothorax on routine post-placement chest roentgenogram on the side opposite the catheter placement.  Retrospective review of charts, radiographs, and laboratory studies.  No causative relationship was identified between the percutaneous placement of the central venous catheters and the subsequent pneumothoraces identified on the contralateral side, other than the presence of active COVID-19 viral pneumonia. The timing of the contralateral pneumothoraces were coincidental the placement of the central venous catheters.  We believe these pneumothoraces were a consequence of the pulmonary pathology of the COVID-19 virus.
Prognostic Significance of Absolute Lymphocyte Count, Absolute Neutrophil Count, and Neutrophil-to-Lymphocyte Ratio in COVID-19
Authors: Padmaprakash K. V. , Ashta Kuldeep Kumar , Raman Nishant , Vardhan Vasu , Thareja Sandeep , Muthukrishnan J. , Rajmohan KS , Dubey Sudhir , Nauhwaar Dheeraj , Kumar Abhinav , Basavaraj P.
Published: September 2021

Introduction:

Effective triage of COVID-19 patients, especially in resource-limited settings, requires cost-effective and readily available markers. The present study looks at the prognostic role of three such laboratory parameters, absolute lymphocyte count (ALC), absolute neutrophil count (ANC), and neutrophil-to-lymphocyte ratio (NLR).

Methodology:

A retrospective cohort study was done including 328 COVID-19 reverse transcriptase–polymerase chain reaction-confirmed hospitalized patients aged 18 and above in a tertiary center in northern India. Baseline demographic, clinical, and laboratory parameters were collected on the day of admission. Statistical analysis included descriptive statistics, sensitivity–specificity analysis for optimum cutoffs, multiple logistic regression, and Cox proportional hazards regression.

Results:

The median age of the patients was 45 with 266 (81.1%) males and 62 (18.9%) females. A total of 109 (33.2%) patients were affected with moderate to severe disease. Forty-nine (14.9%) patients had fatal outcomes. Median ALC was lower in patients with moderate to severe disease compared to mild disease (895 vs. 1554.2) and in nonsurvivors compared to survivors (732.0 vs. 1423.9). Median ANC (5182.8 vs. 3057.6) and NLR (5.38 vs. 2.03) were significantly raised in patients with moderate to severe disease as against mild disease and in nonsurvivors(ANC 7040.25 vs. 3448.5, NLR 10.05 vs. 2.35). ALC <1273, ANC >3907, and NLR >2.74 showed considerable sensitivity and specificity for disease severity at admission. ALC and ANC were significantly associated with the odds of moderate to severe disease at admission in the multivariable logistic regression analysis. ALC <1183, ANC >4612, and NLR >3.76 had good sensitivity and specificity as predictors of mortality and emerged as independent risk factors for mortality in the multivariable Cox proportional hazards regression.

Conclusion:

ALC, ANC, and NLR are relatively cost-effective and readily available routine investigations obtained as a part of complete blood count. These indices show good prognostic significance. Their utility in clinical algorithms can better guide management of patients.