bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Interaction of Type Iax Supernova Ejecta with a Helium Companion Star
Authors: Zeng Yaotian , Liu Zheng-Wei , Han Zhanwen 
Published: July 2020

Abstract
Type Iax supernovae (SNe Iax) are an important subluminous class of SNe Ia. However, their progenitors and explosion mechanisms are not yet understood. It has been suggested that SNe Iax may be produced from weak deflagration explosions of Chandrasekhar-mass white dwarfs (WDs) in binary systems with a helium (He) star donor. In such progenitor systems, the stripped He companion material caused by the ejecta-companion interaction is expected to present some He features in their late-time spectra. However, the detection of He lines in late-time spectra of SNe Iax has not yet been successful, which gives an upper limit on the amount of stripped He mass of

. In this work, we study the interaction between SN Iax ejecta and a He star companion by performing three-dimensional hydrodynamical simulations with a weak pure deflagration explosion model. We find that about

of He material can be stripped off from the companion star by SN explosion, which is very close to (or lower than) the observational upper limit on the total stripped He mass in SNe Iax. We, therefore, conclude that nondetection of He lines in late-time spectra of SNe Iax could be reasonably explained if they indeed resulted from weak pure deflagration explosions of Chandrasekhar-mass WDs in progenitor systems with a He star donor.
Circumbinary Disks of the Protostellar Binary Systems in the L1551 Region
Authors: Takakuwa Shigehisa , Saigo Kazuya , Matsumoto Tomoaki , Saito Masao , Lim Jeremy , Yen Hsi-Wei , Ohashi Nagayoshi , Ho Paul T. P. , Looney Leslie W. 
Published: July 2020

Abstract
We report Atacama Large Millimeter/submillimeter Array Cycle 4 observations of the Class I binary protostellar system L1551 IRS 5 in the 0.9 mm continuum emission, C18O (J = 3–2), OCS (J = 28–27), and four other Band 7 lines. At ∼0.″07 (=10 au) resolution in the 0.9 mm emission, two circumstellar disks (CSDs) associated with the binary protostars are separated from the circumbinary disk (CBD). The CBD is resolved into two spiral arms, one connecting to the CSD around the northern binary source, Source N, and the other to Source S. As compared to the CBD in the neighboring protobinary system L1551 NE, the CBD in L1551 IRS 5 is more compact (r ∼ 150 au) and the m = 1 mode of the spirals found in L1551 NE is less obvious in L1551 IRS 5. Furthermore, the dust and molecular-line brightness temperatures of CSDs and CBD reach >260 and >100 K, respectively, in L1551 IRS 5, much hotter than those in L1551 NE. The gas motions in the spiral arms are characterized by rotation and expansion. Furthermore, the transitions from the CBD to the CSD rotations at around the L2 and L3 Lagrangian points and gas motions around the L1 point are identified. Our numerical simulations reproduce the observed two spiral arms and expanding gas motion as a result of gravitational torques from the binary, transitions from the CBD to the CSD rotations, and the gas motion around the L1 point. The higher temperature in L1551 IRS 5 likely reflects the inferred FU Ori event.
The Streaming Instability in Two-dimensional Protoplanetary Disks
Authors: Pan Liubin , Yu Cong 
Published: July 2020

Abstract
We conduct a two-dimensional (2D) stability analysis for the aerodynamically coupled system of gas and dust in protoplanetary disks using the WKB approximation. The 2D analysis may apply to a vertically integrated disk or a thin dust layer at the disk midplane. We show that the streaming instability exists in 2D and examine the growth rate and its dependence on the mean dust-to-gas ratio,

ϵ

¯

, and the Stokes number, St. For small

ϵ

¯

, the dust back reaction may be viewed as a perturbation to the wave system, and analytical results are successfully derived by the method of perturbation with respect to

ϵ

¯

. At a given azimuthal wavenumber, m, the growth rate as a function of the radial wavenumber, kr, shows a peak corresponding to the resonance between the relative drift velocity and the Rossby/trivial waves in the gas. For small

ϵ

¯

, the peak growth rate at resonant modes increases as m
1/2 when the Rossby wave effect is negligible and the gas wave becomes trivial. With increasing St, the peak growth rate increases as St
1/2 at St ≪ 1, peaks at St ∼ 1, and finally decreases as St
−1/2 for St ≫ 1. We find that the growth rate scales with

ϵ

¯

as

ϵ

¯

1

/

2

at

ϵ

¯

≪
1

and peaks at

ϵ

¯

∼
1

. The instability is physically interpreted as a runaway process of dust trapping in relative drift-induced anticyclonic vortices. The effects of the compressibility and viscosity of the gas, the applicability of the WKB application, and the effects of the Keplerian shear are discussed.
The Zwicky Transient Facility Catalog of Periodic Variable Stars
Authors: Chen Xiaodian , Wang Shu , Deng Licai , de Grijs Richard , Yang Ming , Tian Hao 
Published: July 2020

Abstract
The number of known periodic variables has grown rapidly in recent years. Thanks to its large field of view and faint limiting magnitude, the Zwicky Transient Facility (ZTF) offers a unique opportunity to detect variable stars in the northern sky. Here, we exploit ZTF Data Release 2 (DR2) to search for and classify variables down to r ∼ 20.6 mag. We classify 781,602 periodic variables into 11 main types using an improved classification method. Comparison with previously published catalogs shows that 621,702 objects (79.5%) are newly discovered or newly classified, including ∼700 Cepheids, ∼5000 RR Lyrae stars, ∼15,000 δ Scuti variables, ∼350,000 eclipsing binaries, ∼100,000 long-period variables, and about 150,000 rotational variables. The typical misclassification rate and period accuracy are on the order of 2% and 99%, respectively. 74% of our variables are located at Galactic latitudes,

. This large sample of Cepheids, RR Lyrae, δ Scuti stars, and contact (EW-type) eclipsing binaries is helpful to investigate the Galaxy’s disk structure and evolution with an improved completeness, areal coverage, and age resolution. Specifically, the northern warp and the disk’s edge at distances of 15–20 kpc are significantly better covered than previously. Among rotational variables, RS Canum Venaticorum and BY Draconis-type variables can be separated easily. Our knowledge of stellar chromospheric activity would benefit greatly from a statistical analysis of these types of variables.
Les « think tanks » dans les régimes de la connaissance politiquement ancrée : la « porte tournante » est-elle importante en Chine ?
Authors: Zhu Xufeng 
Published: July 2020

Dans le présent article, nous conceptualisons un « régime de la connaissance politiquement ancrée » dans lequel le pouvoir politique est profondément enraciné dans les réseaux administratifs et personnels entre les décideurs bureaucratiques et leurs consultants professionnels. Afin d’illustrer les caractéristiques du régime de la connaissance politiquement ancrée, j’évalue les effets du système de la porte tournante (revolving door) sur les « think tanks » (groupes de réflexions) chinois. Je constate de manière empirique que la porte tournante contribue de manière négligeable à l’influence et aux revenus des « think tanks » en Chine. De plus, la porte tournante a des effets négatifs significatifs sur la construction des réseaux sociaux personnels des membres des « think tanks ». Nous effectuons une analyse hétérogène et un appariement des coefficients de propension pour présenter la robustesse des résultats de la régression. Remarques à l’intention des praticiens La politique de la « porte tournante » a toujours été considérée comme un facteur essentiel pour la prospérité des « think tanks » américains. Elle est aujourd’hui devenue la stratégie de recrutement dominante pour les « think tanks » internationaux. En particulier, le gouvernement et le monde universitaire chinois adoptent à présent le mécanisme de la porte tournante dans le cadre de la création des « think tanks » chinois. Pourtant, aucune recherche empirique systématique n’a été menée pour évaluer les effets exacts de la porte tournante sur les « think tanks » chinois. Mes observations empiriques révèlent que les expériences de développement des « think tanks » américains ne sont peut-être pas aussi efficaces lorsqu’elles sont appliquées à d’autres pays ayant des régimes de la connaissance différents.
Qui fait la carrière de l’officier, l’individu ou son institution ? Le cas des officiers français
Authors: Morin Gabriel , Chanut Véronique 
Published: July 2020

Le phénomène de managérialisation qui affecte l’État, ainsi que ses élites, contribue à y provoquer une irruption de l’individu. L’institution militaire n’échappe pas à ces transformations organisationnelles qui en découlent. À travers l’analyse de la carrière des officiers français, cette étude explore les effets de cette managérialisation. La question de recherche qui est posée cherche à déterminer qui, de l’individu ou de son institution, fait la carrière de l’officier français ? L’étude empirique s’appuie sur des données primaires très denses récoltées auprès d’acteurs clés de la fabrication des élites militaires françaises : des officiers généraux, pour certains directeurs d’écoles militaires, ayant été successivement élèves, instructeurs et concepteurs de ce parcours professionnel du chef militaire. Les résultats montrent que, malgré un processus de civilianisation sans précèdent de l’institution militaire, la carrière de chef militaire se révèle plus immuable. Le parcours professionnel de l’officier français peut, ainsi, se lire comme un marqueur de l’identité institutionnelle militaire. Remarques à l’intention des praticiens L’institution militaire peut apparaître comme un miroir des évolutions sociologiques majeures et notamment du phénomène de managérialisation qui concerne l’État avec son corollaire, l’individualisme. L’analyse de la carrière des officiers français permet d’explorer les effets de cette managérialisation. Les résultats de l’étude atténuent les effets de ce phénomène, appelé également civilianisation dans le cas des forces armées, et révèlent au contraire le caractère invariant de la carrière de chef militaire, pilier de l’identité institutionnelle militaire.
Léovigild à Narbonne
Authors: Martin Céline 
Published: July 2020

Alors que l’on ne conservait jusqu’ici presque aucune charte d’époque visigothique, quatre chartes en provenance du monastère pyrénéen de Saint-Martin d’Asán ont récemment été découvertes. Cette étude porte sur trois d’entre elles, datées de 572 à 586, dont deux diplômes, l’un de Léovigild, émis à Narbonne, l’autre de son fils Reccared, tous deux proposés en traduction. Elles apportent des informations de première importance sur la chronologie des successions au trône, sur les immunités fiscales, les relations entre la province Narbonnaise et la péninsule Ibérique à l’intérieur du royaume goth, ainsi que sur le rôle politique des élites aristocratiques de l’espace circumpyrénéen à la fin du vi e siècle. Les confiscations auxquelles elles font allusion ont pu se produire en 580, au moment de la révolte d’Herménégild : elles sont en tout cas politiques et visiblement sans rapport avec un supposé conflit entre rois ariens et évêques catholiques. L’image qui se dégage des nouvelles chartes d’Asán est celle d’un royaume visigothique peu différent de son voisin mérovingien.
L’enfance : une nouvelle catégorie politique
Authors: Pingeot Mazarine 
Published: July 2020

Cet article a pour but de montrer que « l’enfance », comme catégorie épistémologique et comme catégorie temporelle, est ce qui a été évacué de la modernité au profit d’un rapport rationnel au monde – identifié à l’âge adulte. L’enfance est du côté du passé, de la perception sensible, du préjugé. Elle représente la minorité dont il faut s’émanciper. La science moderne et l’homme nouveau se sont construits sur l’oubli de l’enfance. Or nous assistons aujourd’hui au retour du refoulé : l’enfance revient en force, comme catégorie politique et comme source de légitimation du discours.
Pratiques éthiques et politique de soi dans l’éducation : l’éducation éthique comme remède à la « vie nue » ? L’exemple de la lutte contre le racisme à l’école
Authors: Moreau Didier 
Published: July 2020

Reprenant l’expression de Walter Benjamin, Giorgio Agamben analyse la « vie nue » comme l’existence humaine exposée à la souveraineté du biopouvoir thématisé par Foucault. Parmi les manifestations de la constitution du corps biopolitique, le racisme peut être analysé comme une technologie par laquelle les techniques de soi sont mises au service des techniques de domination. C’est pourquoi la lutte contre le racisme à l’école ne peut pas être engagée sur le seul terrain d’un changement des mentalités, mais doit inclure la mise en œuvre de pratiques éthiques collectives par lesquelles les élèves seraient engagés dans la reconstitution d’une « vie politique », au sens de Hannah Arendt, dans la Condition de l’homme moderne . Cette mise en œuvre suppose le découplage des « techniques de soi et des techniques de domination » selon Foucault, pour aboutir au projet d’une politique de soi. Lutter contre le racisme à l’école, c’est aussi lutter contre la résignation et le consentement à la subalternité.
Isoform- and Cell Type–Specific Roles of Glycogen Synthase Kinase 3 N-Terminal Serine Phosphorylation in Liver Ischemia Reperfusion Injury
Authors: Ni Ming , Zhou Haoming , Zhang Jing , Jin Dan , Lu Tianfei , Busuttil Ronald W. , Kupiec-Weglinski Jerzy W. , Wang Xuehao , Zhai Yuan 
Published: July 2020

Abstract
Glycogen synthase kinase 3 (Gsk3) α and β are both constitutively active and inhibited upon stimulation by N-terminal serine phosphorylation. Although roles of active Gsk3 in liver ischemia reperfusion injury (IRI) have been well appreciated, whether Gsk3 N-terminal serine phosphorylation has any functional significance in the disease process remains unclear. In a murine liver partial warm ischemia model, we studied Gsk3 N-terminal serine mutant knock-in (KI) mice and showed that liver IRI was decreased in Gsk3αS21A but increased in Gsk3βS9A mutant KI mice. Bone marrow chimeric experiments revealed that the Gsk3α, but not β, mutation in liver parenchyma protected from IRI, and both mutations in bone marrow–derived cells exacerbated liver injuries. Mechanistically, mutant Gsk3α protected hepatocytes from inflammatory (TNF-α) cell death by the activation of HIV-1 TAT-interactive protein 60 (TIP60)–mediated autophagy pathway. The pharmacological inhibition of TIP60 or autophagy diminished the protection of the Gsk3α mutant hepatocytes from inflammatory cell death in vitro and the Gsk3α mutant KI mice from liver IRI in vivo. Thus, Gsk3 N-terminal serine phosphorylation inhibits liver innate immune activation but suppresses hepatocyte autophagy in response to inflammation. Gsk3 αS21, but not βS9, mutation is sufficient to sustain Gsk4 activities in hepatocytes and protect livers from IRI via TIP60 activation.
Modulation of radiative aerosols effects by atmospheric circulation over the Euro-Mediterranean region
Authors: Nabat Pierre , Somot Samuel , Cassou Christophe , Mallet Marc , Michou Martine , Bouniol Dominique , Decharme Bertrand , Drugé Thomas , Roehrig Romain , Saint-Martin David 
Published: July 2020

Abstract. The present work aims at better understanding regional climate–aerosol interactions by studying the relationships between aerosols and synoptic atmospheric circulation over the Euro-Mediterranean region. Two 40-year simulations (1979–2018) have been carried out with version 6.3 of the Centre National de Recherches Météorologiques (National Centre for Meteorological Research) – Aire Limitée Adaptation dynamique Développement InterNational (CNRM-ALADIN) regional climate model, one using interactive aerosols and the other one without any aerosol.
The simulation with aerosols has been evaluated in terms of different climate and aerosol parameters. This evaluation shows a good agreement between the model and observations, significant improvements compared to the previous model version and consequently the relevance of using this model for the study of climate–aerosol interactions over this region. A first attempt to explain the climate variability of aerosols is based on the use of the North Atlantic Oscillation (NAO) index. The latter explains a significant part of the interannual variability, notably in winter for the export of dust aerosols over the Atlantic Ocean and the eastern Mediterranean, and in summer for the positive anomalies of anthropogenic aerosols over western Europe. This index is however not sufficient to fully understand the variations of aerosols in this region, notably at daily scale. The use of “weather regimes”, namely persisting meteorological patterns, stable at synoptic scale for a few days, provides a relevant description of atmospheric circulation, which drives the emission, transport and deposition of aerosols. The four weather regimes usually defined in this area in winter and in summer bring significant information to answer this question. The blocking and NAO+ regimes are largely favourable to strong aerosol effects on shortwave surface radiation and near-surface temperature, either because of higher aerosol loads or because of weaker cloud fraction, which reinforces the direct aerosol effect. Inversely, the NAO− and Atlantic Ridge regimes are unfavourable to aerosol radiative effects, because of weaker aerosol concentrations and increased cloud cover. This study thus puts forward the strong dependence of aerosol loads on the synoptic circulation from interannual to daily scales and, as a consequence, the important modulation of the aerosol effects on shortwave surface radiation and near-surface temperature by atmospheric circulation. The role of cloud cover is essential in this modulation as shown by the use of weather regimes.
Novel method to reduce the transverse sensitivity of granular thin film strain gauges by modification of strain transfer
Authors: Mathis Maximilian , Vollberg Dennis , Langosch Matthäus , Göttel Dirk , Lellig Angela , Schultes Günter 
Published: July 2020

Abstract. Strain gauges based on polyimide carrier foils and piezoresistive
granular thin films are highly sensitive to strain. Unlike
conventional metal foil, granular film strain gauges also have
a pronounced sensitivity to strain acting in the transverse
direction. A novel method that allows for the modification of the strain transfer is
proposed and proven experimentally. The method is based on the
creation of stand-alone polyimide paths, on top of which the
piezoresistive thin film is located. In this way, the granular film
hardly receives any transverse strain; hence, the transverse
sensitivity is drastically reduced. A picosecond laser system can be
used for both patterning of the thin film and for controlled ablation
of polyimide in order to generate well-defined high path
structures. The working principle of the method is demonstrated by
simulation, followed by an experimental verification using measurements
of the transverse gauge factor. Furthermore, the output signal of
force transducers may be increased using granular thin film strain
gauges of reduced transverse sensitivity.
Assessment of emergency healthcare worker knowledge of indicators of human trafficking
Authors: Hoblet Karen Linda , Kuhn Rebecca , Perne Heather , Jablonski Joseph 
Published: July 2020

Human trafficking is a multibillion-dollar industry and Toledo, Ohio has been identified as a hub of human trafficking activity. Current literature identified that healthcare providers working in emergency departments, urgent care centers, and physician offices (nurses, physician assistants, and physicians) are in positions to identify victims of human trafficking and help with rescue. Current curricular guidance for healthcare education did not include specific information on indicators of human trafficking and resources to assist with rescue and recovery. The human trafficking awareness study was completed to determine if healthcare providers working in nine Toledo, Ohio area emergency departments had knowledge of the indicators of human trafficking and of the resources to help victims. The study design also afforded the opportunity to provide healthcare workers in these organizations’ information about indicators of human trafficking and local, state and national resources to help victims with rescue and recovery.
English Language Teaching in Brazil: A Gap in Policy, Problems in Practice
Authors: Batista Fernanda C. A. 
Published: July 2020

Only three percent of Brazilians are estimated to speak English despite the status of this language as a mandatory subject in grades 10 to 12 of basic education and preferred foreign language in grades 5 to 9. This paper will analyse possible reasons for this fact. The widespread concept in the Brazilian society that speaking English is beneficial to individuals because it provides access to the globalised world does not seem to be enough to promote the actual learning of the language by the majority of the population, and it is argued here that this fact has to do with a gap in the foreign language teaching policy documents: the 2015 National Education Guidelines and Framework Law (LDB 2015), the Brazilian National Curriculum Parameters for Primary Education (PCN-EF), and the Brazilian National Curriculum Parameters for Secondary Education (PCN-EM). These documents do not prescribe the necessary conditions for English Language Teaching (ELT) to take place effectively, but, instead, provide suggestions for teachers on how to adapt to the status quo, which means focusing on reading to the detriment of the other aspects of the English language due to a number of factors ranging from a lack of resources to a large number of students per class.
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Custos da qualidade: um estudo no serviço de nutrição e dietética de um hospital em processo de acreditação
Authors: De Oliveira Rosângela , Abbas Katia , Da Silva Beatriz Negrelli , Costa Maria Angélica Silva 
Published: July 2020

O estudo tem como objetivo identificar os custos da qualidade existentes no Serviço de Nutrição e Dietética (SND), visto que os hospitais são organizações complexas que estão inseridas em um contexto de custos elevados e recursos escassos, demandando, assim, qualidade em seus serviços e processos. Neste aspecto, fica evidente a necessidade da gestão de custos, buscando a eficiência, sem comprometer a qualidade dos serviços prestados, tendo em vista que a qualidade é um elemento fundamental para a sobrevivência e competitividade das organizações. Para tanto, os custos da qualidade objetivam auxiliar na estratégia e gerenciamento organizacional, podendo ser classificados em custos de prevenção, avaliação, falhas internas e falhas externas. O estudo se configura como uma pesquisa de natureza qualitativa, de caráter descritivo, com recorte transversal, e cuja estratégia utilizada foi o estudo de caso. Quanto à coleta de dados, utilizou-se a observação in loco, bem como entrevistas com as nutricionistas, copeiras e gerente financeiro, com o intuito de identificar os custos da qualidade existentes na instituição. Os principais resultados evidenciaram que o SND apresenta custos de prevenção (treinamentos aos funcionários e padronização); custos de avaliação (questionários acerca da qualidade das refeições) e custos de falhas internas (desperdícios e manutenção corretiva), contudo, não há, até o momento da realização desta pesquisa, um tratamento específico com relação aos custos da qualidade no hospital, tampouco os mesmos são evidenciados separadamente nas demonstrações contábeis e relatórios gerenciais da organização.