bluuebunny/crossref_metadata_2025_split huggingface dataset:
Benefit of Six-minute Walk Test to the Quality of Life and Functional Capacity in Chronic Coronary Syndrome Patients
Authors: Simamora Poniton P. A. R. , Rampengan Starry H. , Panda Agnes L. 
Published: February 2022

Abstract: Patients with chronic coronary syndrome (CSS) have lower quality of life (QoL) due to the high frequency of angina and limits in carrying out activities, which is reflected in their low functional capacity. The six-minute walk test (6-MWT) is used to assess the patient's QoL and functional capabilities. This study aimed to determine the benefit of the 6-MWT on QoL and functional capacity in CCS. This was a literature review study using four databases, namely PubMed, ClinicalKey, Google Scholar, and Science Direct. The results obtained five studies discussing the utility of 6-MWT for risk stratification, three studies discussing the utility of 6-MWT in assessing functional capacity, and four studies discussing the utility of 6-MWT in assessing the QoL in CCS patients. The low functional capacity of CCS patients contributed to decreased QoL. In conclusion, the 6-MWT is a simple walking test that is easy to perform, valid, responsive and can be tolerated by CCS patients, and it can be used for risk stratification, functional capacity assessment, and QoL assessment.Keywords: six-minute walk test, chronic coronary syndrome, quality of life, functional capacity Abstrak: Pasien sindrom koroner kronis (SKK) memiliki kualitas hidup yang lebih rendah karena tingginya frekuensi angina dan keterbatasan melakukan aktivitas yang tergambar dalam kapasitas fungsional yang rendah. Kualitas hidup pasien dan kapasitas fungsional dapat dievaluasi menggunakan tes latihan uji jalan enam menit (UJ6M). Penelitian ini bertujuan untuk mengetahui kegunaan UJ6M terhadap kualitas hidup dan kapasitas fungsional pada pasien SKK. Jenis penelitian ialah suatu literature review. Penelusuran data menggunakan PubMed, ClinicalKey, Google Scholar, and Science Direct. Hasil penelitian mendapatkan lima artikel membahas tentang kegunaan UJ6M untuk stratifikasi risiko, tiga artikel membahas tentang kegunaan UJ6M dalam menilai kapasitas fungsional, dan empat artikel membahas tentang kegunaan UJ6M dalam menilai kualitas hidup pasien SKK. Didapatkan bahwa kapasitas fungsional pasien SKK yang rendah memiliki kontribusi terhadap kualitas hidup yang menurun. Simpulan penelitian ini ialah uji jalan enam menit merupakan tes berjalan sederhana yang mudah dilakukan, valid, responsif serta dapat ditoleransi oleh pasien SKK yang berperan dalam stratifikasi risiko, penilaian kapasitas fungsional, dan kualitas hidup.Kata kunci: uji jalan enam menit; sindrom koroner kronis; kualitas hidup; kapasitas fungsional
Exploring the High-redshift PBH-ΛCDM Universe: Early Black Hole Seeding, the First Stars and Cosmic Radiation Backgrounds
Authors: Cappelluti Nico , Hasinger Günther , Natarajan Priyamvada 
Published: February 2022

Abstract
We explore the observational implications of a model in which primordial black holes (PBHs) with a broad birth mass function ranging in mass from a fraction of a solar mass to ∼106
M
⊙, consistent with current observational limits, constitute the dark matter (DM) component in the universe. The formation and evolution of dark matter and baryonic matter in this PBH-Λ cold dark matter (ΛCDM) universe are presented. In this picture, PBH-DM mini-halos collapse earlier than in standard ΛCDM, baryons cool to form stars at z ∼ 15–20, and growing PBHs at these early epochs start to accrete through Bondi capture. The volume emissivity of these sources peaks at z ∼ 20 and rapidly fades at lower redshifts. As a consequence, PBH DM could also provide a channel to make early black hole seeds and naturally account for the origin of an underlying DM halo–host galaxy and central black hole connection that manifests as the M
bh–σ correlation. To estimate the luminosity function and contribution to integrated emission power spectrum from these high-redshift PBH-DM halos, we develop a halo occupation distribution model. In addition to tracing the star formation and reionization history, it permits us to evaluate the cosmic infrared and X-ray backgrounds. We find that accretion onto PBHs/active galactic nuclei successfully accounts for the detected backgrounds and their cross-correlation, with the inclusion of an additional IR stellar emission component. Detection of the deep IR source count distribution by the James Webb Space Telescope could reveal the existence of this population of high-redshift star-forming and accreting PBH DM.
Dramatic Changes in the Observed Velocity of the Accretion Disk Wind in MCG-03-58-007 Are Revealed by XMM-Newton and NuSTAR
Authors: Braito V. , Reeves J. N. , Matzeu G. , Severgnini P. , Ballo L. , Cicone C. , Ceca R. Della , Giustini M. , Sirressi M. 
Published: February 2022

Abstract
Past X-ray observations of the nearby Seyfert 2 MCG-03-58-007 revealed the presence of a powerful and highly variable disk wind, where two possible phases outflowing with v
out1/c ∼ −0.07 and v
out2/c ∼ −0.2 were observed. Multi-epoch X-ray observations, covering the period from 2010 to 2018, showed that the lower-velocity component is persistent, as it was detected in all the observations, while the faster phase outflowing with v
out2/c ∼ −0.2 appeared to be more sporadic. Here we present the analysis of a new monitoring campaign of MCG-03-58-007 performed in 2019 May–June and consisting of four simultaneous XMM-Newton and NuSTAR observations. We confirm that the disk wind in MCG-03-58-007 is persistent, as it is detected in all the observations, and powerful, having a kinetic power that ranges between 0.5% and 10% of the Eddington luminosity. The highly ionized wind (log(ξ/erg cm s−1) ∼ 5) is variable in both the opacity and, remarkably in its velocity. This is the first time where we have observed a substantial variability of the outflowing velocity in a disk wind, which dropped from v
out/c ∼ −0.2 (as measured in the first three observations) to v
out/c ∼ −0.074 in just 16 days. We conclude that such a dramatic and fast variability of the outflowing velocity could be due to the acceleration of the wind, as recently proposed by Mizumoto et al. Here, the faster wind, seen in the first three observations, is already accelerated to v
out/c ∼ −0.2, while in the last observation our line of sight intercepts only the slower, pre-accelerated streamline.
Correlated Spatio-temporal Evolution of Extreme-Ultraviolet Ribbons and Hard X-Rays in a Solar Flare
Authors: Naus S. J. , Qiu J. , DeVore C. R. , Antiochos S. K. , Dahlin J. T. , Drake J. F. , Swisdak M. 
Published: February 2022

Abstract
We analyze the structure and evolution of ribbons from the M7.3 SOL2014-04-18T13 flare using ultraviolet images from the Interface Region Imaging Spectrograph and the Solar Dynamics Observatory (SDO)/Atmospheric Imaging Assembly (AIA), magnetic data from the SDO/Helioseismic and Magnetic Imager, hard X-ray (HXR) images from the Reuven Ramaty High Energy Solar Spectroscopic Imager, and light curves from the Fermi/Gamma-ray Burst Monitor, in order to infer properties of coronal magnetic reconnection. As the event progresses, two flare ribbons spread away from the magnetic polarity inversion line. The width of the newly brightened front along the extension of the ribbon is highly intermittent in both space and time, presumably reflecting nonuniformities in the structure and/or dynamics of the flare current sheet. Furthermore, the ribbon width grows most rapidly in regions exhibiting concentrated nonthermal HXR emission, with sharp increases slightly preceding the HXR bursts. The light curve of the ultraviolet emission matches the HXR light curve at photon energies above 25 keV. In other regions the ribbon-width evolution and light curves do not temporally correlate with the HXR emission. This indicates that the production of nonthermal electrons is highly nonuniform within the flare current sheet. Our results suggest a strong connection between the production of nonthermal electrons and the locally enhanced perpendicular extent of flare ribbon fronts, which in turn reflects the inhomogeneous structure and/or reconnection dynamics of the current sheet. Despite this variability, the ribbon fronts remain nearly continuous, quasi-one-dimensional features. Thus, although the reconnecting coronal current sheets are highly structured, they remain quasi-two-dimensional and the magnetic energy release occurs systematically, rather than stochastically, through the volume of the reconnecting magnetic flux.
Dynamical Friction, Buoyancy, and Core-stalling. I. A Nonperturbative Orbit-based Analysis
Authors: Banik Uddipan , van den Bosch Frank C. 
Published: February 2022

Abstract
We examine the origin of dynamical friction using a nonperturbative, orbit-based approach. Unlike the standard perturbative approach, in which dynamical friction arises from the LBK torque due to pure resonances, this alternative, complementary view nicely illustrates how a massive perturber significantly changes the energies and angular momenta of field particles on near-resonant orbits, with friction arising from an imbalance between particles that gain energy and those that lose energy. We treat dynamical friction in a spherical host system as a restricted three-body problem. This treatment is applicable in the “slow” regime, in which the perturber sinks slowly and the standard perturbative framework fails due to the onset of nonlinearities. Hence, it is especially suited to investigate the origin of core-stalling: the cessation of dynamical friction in central constant-density cores. We identify three different families of near-corotation-resonant orbits that dominate the contribution to dynamical friction. Their relative contribution is governed by the Lagrange points (fixed points in the corotating frame). In particular, one of the three families, which we call Pac-Man orbits because of their appearance in the corotating frame, is unique to cored density distributions. When the perturber reaches a central core, a bifurcation of the Lagrange points drastically changes the orbital makeup, with Pac-Man orbits becoming dominant. In addition, due to relatively small gradients in the distribution function inside a core, the net torque from these Pac-Man orbits becomes positive (enhancing), thereby effectuating a dynamical buoyancy. We argue that core-stalling occurs where this buoyancy is balanced by friction.
DECi-hertz Interferometer Gravitational-wave Observatory: Forecast Constraints on the Cosmic Curvature with LSST Strong Lenses
Authors: Cao Shuo , Liu Tonghua , Biesiada Marek , Liu Yuting , Guo Wuzheng , Zhu Zong-Hong 
Published: February 2022

Abstract
In this paper, we aim to use the DECi-hertz Interferometer Gravitational-wave Observatory (DECIGO), a future Japanese space gravitational-wave antenna sensitive to the frequency range between LISA and ground-based detectors, to provide gravitational-wave constraints on the cosmic curvature at z ∼ 5. In the framework of the well-known distance sum rule, the perfect redshift coverage of the standard sirens observed by DECIGO, compared with lensing observations including the source and lens from LSST, makes such cosmological-model-independent tests more natural and general. Focusing on three kinds of spherically symmetric mass distributions for the lensing galaxies, we find that the cosmic curvature is expected to be constrained with the precision of ΔΩ
K
∼ 10−2 in the early universe (z ∼ 5.0), improving the sensitivity of ET constraints by about a factor of 10. However, in order to investigate this further, the mass-density profiles of early-type galaxies should be properly taken into account. Specifically, our analysis demonstrates the strong degeneracy between the spatial curvature and the lens parameters, especially the redshift evolution of the power-law lens index parameter. When the extended power-law mass-density profile is assumed, the weakest constraint on the cosmic curvature can be obtained, whereas the addition of DECIGO to the combination of LSST+DECIGO does improve significantly the constraint on the luminosity–density slope and the anisotropy of the stellar velocity dispersion. Therefore, our paper highlights the benefits of synergies between DECIGO and LSST in constraining new physics beyond the standard model, which could manifest themselves through accurate determination of the cosmic curvature.
No Such Thing as a Simple Flare: Substructure and Quasi-periodic Pulsations Observed in a Statistical Sample of 20 s Cadence TESS Flares
Authors: Howard Ward S. , MacGregor Meredith A. 
Published: February 2022

Abstract
A 20 s cadence Transiting Exoplanet Survey Satellite monitoring campaign of 226 low-mass flare stars during Cycle 3 recorded 3792 stellar flares of ≥1032 erg. We explore the time-resolved emission and substructure in 440 of the largest flares observed at high signal-to-noise, 97% of which released energies of ≥1033 erg. We discover degeneracy present at 2 minute cadence between sharply peaked and weakly peaked flares is common, although 20 s cadence breaks these degeneracies. We better resolve the rise phases and find 46% of large flares exhibit substructure during the rise phase. We observe 49 candidate quasi-periodic pulsations (QPP) and confirm 17 at ≥3σ. Most of our QPPs have periods less than 10 minutes, suggesting short-period optical QPPs are common. We find QPPs in both the rise and decay phases of flares, including a rise-phase QPP in a large flare from Proxima Cen. We confirm that the Davenport et al. template provides a good fit to most classical flares observed at high cadence, although 9% favor Gaussian peaks instead. We characterize the properties of complex flares, finding 17% of complex flares exhibit “peak-bump” morphologies composed of a large, highly impulsive peak followed by a second, more gradual Gaussian peak. We also estimate the UVC surface fluences of temperate planets at flare peak and find one-third of 1034 erg flares reach the D90 dose of Deinococcus radiodurans in just 20 s in the absence of an atmosphere.
Bayesian Inference of Globular Cluster Properties Using Distribution Functions
Authors: Eadie Gwendolyn M. , Webb Jeremy J. , Rosenthal Jeffrey S. 
Published: February 2022

Abstract
We present a Bayesian inference approach to estimating the cumulative mass profile and mean-squared velocity profile of a globular cluster (GC) given the spatial and kinematic information of its stars. Mock GCs with a range of sizes and concentrations are generated from lowered-isothermal dynamical models, from which we test the reliability of the Bayesian method to estimate model parameters through repeated statistical simulation. We find that given unbiased star samples, we are able to reconstruct the cluster parameters used to generate the mock cluster and the cluster’s cumulative mass and mean-squared velocity profiles with good accuracy. We further explore how strongly biased sampling, which could be the result of observing constraints, might affect this approach. Our tests indicate that if we instead have biased samples, then our estimates can be off in certain ways that are dependent on cluster morphology. Overall, our findings motivate obtaining samples of stars that are as unbiased as possible. This may be achieved by combining information from multiple telescopes (e.g., Hubble and Gaia), but will require careful modeling of the measurement uncertainties through a hierarchical model, which we plan to pursue in future work.
Kinetic-scale Flux Ropes: Observations and Applications of Kinetic Equilibrium Models
Authors: Yang 杨 Fan 帆 , Zhou 周 Xu-Zhi 煦之 , Li 李 Jing-Huan 京寰 , Zong 宗 Qiu-Gang 秋刚 , Yao 姚 Shu-Tao 淑涛 , Shi 史 Quan-Qi 全岐 , Artemyev Anton V. 
Published: February 2022

Abstract
Magnetic flux ropes with helical field lines and a strong core field are ubiquitous structures in space plasmas. Recently, kinetic-scale flux ropes have been identified by high-resolution observations from the Magnetospheric Multiscale (MMS) spacecraft in the magnetosheath, which have drawn a lot of attention because of their nonideal behavior and internal structures. Detailed investigation of flux rope structure and dynamics requires the development of realistic kinetic models. In this paper, we generalize an equilibrium model to reconstruct a kinetic-scale flux rope previously reported via MMS observations. The key features in the magnetic field and electron pitch-angle distribution measurements of all four satellites are simultaneously reproduced in this reconstruction. Besides validating the model, our results also indicate that the anisotropic features previously attributed to asymmetric magnetic topologies in the magnetosheath can be alternatively explained by the spacecraft motion in the flux rope rest frame.
Ce que la presse écrite jeunesse donne à lire et à voir : le genre du sport
Authors: Hidri Neys Oumaya , Juskowiak Hugo , Bohuon Anaïs , Bréhon Jean 
Published: February 2022

En mettant en scène des sportives et des sportifs, en diffusant à grande échelle des modèles de sportivité, les médias doivent être considérés comme des instances de socialisation. L’article opère une analyse quantitative paramétrée d’un corpus d’une publication, référence essentielle de la presse écrite quotidienne enfantine des 6-10 ans, Le Petit Quotidien , de 2009 à 2019. Quelle place accorde-t-il aux sportifs et sportives ? Quelles activités sportives retient-il dans les articles et photographies publiés ? La mise en visibilité des sportives y est-elle la même que celle des sportifs ? Existe-t-il un traitement genré des activités sportives ? Comment ce journal donne-t-il à lire et à voir le genre du sport ? L’article montre que les sportives, sans être complètement invisibilisées, demeurent reléguées au second plan, confirmant ainsi pour la presse écrite de jeunesse les constats produits par ailleurs.
Jean-Claude Éloy et l’Orient : un exotisme postcolonial ?
Authors: Rebouh Sabrina 
Published: February 2022

Jean-Claude Éloy est un compositeur passionné de musiques extra-européennes – en particulier de musique japonaise – qui revendique un multiculturalisme militant et refuse farouchement que sa démarche puisse être associée à un quelconque exotisme. Pourtant, et sans que la sincérité de son positionnement idéologique puisse être remise en cause, certaines ambiguïtés apparaissent au fur et à mesure de l’étude de sa production. Ainsi, si l’exotisme de surface caractéristique du cœur du xix e siècle a bien disparu au profit d’un intérêt largement documenté pour les cultures musicales non occidentales, on n’en décèle pas moins, dans l’œuvre comme dans la riche production écrite du compositeur, la permanence de thèmes caractéristiques de cet exotisme. L’étude s’appuie en premier lieu sur la définition, à partir du champ littéraire, des thèmes qui sous-tendent l’expression d’un exotisme traditionnel. L’enjeu de l’analyse repose ensuite sur les modalités de traduction de ces thèmes littéraires en sèmes musicaux et leur repérage dans l’œuvre mais également leur articulation avec la sensation d’altérité qui fonde tout exotisme. L’élucidation du paradoxe relevé dans l’œuvre nous amène enfin à formuler l’hypothèse d’un exotisme postcolonial.
La musique de film révélatrice d’engagement : l’exemple du Destin de Youssef Chahine
Authors: Guermazi Amal 
Published: February 2022

Chahine conjugue dans son cinéma ses deux vocations : engagement et divertissement. Dans Le Destin , il parvient à raconter le fanatisme religieux à l’origine de l’autodafé de l’œuvre d’Averroès avec beaucoup de fantaisie, de danses et de musiques. Ainsi, cet article s’intéresse aux fonctions de la musique dans le cinéma du réalisateur. Comment parvient-t-elle à dépasser son rôle habituel, celui de l’animation neutre dans le Septième art arabe, pour devenir une véritable arme contre un fondamentalisme rampant dans l’Égypte des années 1990 ? Afin de répondre à cette problématique, l’analyse se focalise d’abord sur l’organisation structurelle des chansons dans le film. Une fois leurs disposition et évolution discursives dans le récit dramaturgique relevées, la question de leur portée réelle émerge et peut enfin être dévoilée. Il est ainsi constaté que la musique dans le cinéma de Chahine incarne une dimension politique qui, à cause de la censure, est dissimulée derrière un faux semblant de divertissement.
Du symptôme « universitaire ». Le piège capitaliste du relâchement universitaire
Authors: Sauret Marie-Jean 
Published: February 2022

L’humain a troqué sa niche écologique contre un habitat langagier : le langage est le moyen et ce qu’il convient de transmettre pour que le processus d’humanisation soit pérenne. Cet habitat, Lacan en a fourni une théorie en termes de lien social, combinant quatre modalités de discours pour faire tenir les sujets ensemble. Leur ronde suppose leur distinction permise concrètement à partir de l’avènement du Discours Analytique. Les choses se compliquent avec le néolibéralisme, lequel à la fois profite de la science et s’accommode d’une dégradation du Discours Universitaire (et de l’Université) : tel est le symptôme universitaire, délétère aussi bien pour la science, le lien social que le sujet lui-même. Aucune greffe de savoir ne le restaurera, mais la réitération d’un acte analogue à celui par lequel Freud a accueilli le savoir analysant. Une conception de l’enseignant analysant s’en déduit.
Nakai Hisao : clinique, art-thérapie et politique
Authors: Matsumoto Takuya 
Published: February 2022

Dans cet article, nous avons présenté Nakai Hisao, un psychiatre qui a eu une profonde influence sur la psychiatrie et la psychopathologie japonaise. Nakai a mis l’accent sur le processus de rémission de la schizophrénie plutôt que sur le processus de développement. Grâce à l’art-thérapie et à l’observation quotidienne, il a révélé que la schizophrénie n’est pas un processus irréversible, mais plutôt une réponse oscillatoire en changement constant. L’influence de Jacques Lacan, Gilles Deleuze, Félix Guattari, Jean Oury et d’autres est évidente dans sa théorie. Enfin, la relation entre la clinique et la politique chez Nakai a également été examinée en termes d’« après mai 68 ».
Sonification as a Tool for Data Analysis
Authors: Casado Johanna , Díaz-Merced Wanda , García Beatriz , Schneps Matthew , Kolemberg Katrien , Rychtarikova Monika , Roozen Nicolaas Bernardus 
Published: February 2022

This article presents an evaluation of accessibility, using one of the International Standard Organization guidelines (ISO 9241-171:2008, Guidance on software accessibility) to estimate if the sonification software for astronomical data published before 2017 are designed under a User-Centred Design framework based on the accessibility. The evaluation was carried out by scientists, degree students and accessibility specialists. The results suggest that some of the current data analysis prototypes used by space scientists and prototypes used for accessibility do not follow user-centric design which may have contributed to partial fulfillment of the ISO accessibility requirements. and show that the text of the ISO standard can be interpreted in different ways according to the experience and approach of each developer. The raining on accessibility and high granularity user testing should be mandatory for computing science professionals and developers. The contact with the end-users must be part and lead the design of the development from the beginning to produce an accessible tool.