bluuebunny/crossref_metadata_2025_split huggingface dataset:
Search for Intermediate-mass Black Holes at Low Redshift with Intra-night Variability
Authors: Shin Lael , Woo Jong-Hak , Son Donghoon , Cho Hojin , Kim Taewoo , Gallo Elena , Kang Wonseok 
Published: January 2022

Abstract
We present a sample of intermediate-mass black hole (IMBH) candidates based on the detection of a broad Hα emission line and variability, which are selected from the Sloan Digital Sky Survey Data Release 7. By performing spectral decomposition of emission lines as well as a visual inspection, we initially identified 131 targets with a broad Hα line among a large sample of emission line galaxies. We further selected 25 IMBH candidates whose estimated black hole mass (M
BH) is less than 106
M
⊙. To constrain the nature of these candidates, we analyzed X-ray properties and performed an intra-night variability monitoring campaign with optical telescopes. Based on the optical variability analysis, we report a sample of 11 targets with detected intra-night variability as the best IMBH candidates, which are suitable for follow-up observations for accurate M
BH determination such as reverberation mapping campaigns.
Gravitational Collider Physics via Pulsar–Black Hole Binaries II: Fine and Hyperfine Structures Are Favored
Authors: Tong Xi , Wang Yi , Zhu Hui-Yu 
Published: January 2022

Abstract
A rotating black hole can be clouded by light bosons via superradiance and thus acquire an atom-like structure. If such a gravitational atom system is accompanied by a pulsar, the pulsar can trigger transitions between energy levels of the gravitational atom, and these transitions can be detected by pulsar timing. We show that in such pulsar–black hole systems, fine and hyperfine structure transitions are more likely to be probed than the Bohr transition. Also, the calculation of these fine and hyperfine structure transitions are under better analytic control. Thus, these fine and hyperfine structure transitions are more ideal probes in the search for gravitational collider signals in pulsar–black hole systems.
X-Ray Burst and Persistent Emission Properties of the Magnetar SGR 1830-0645 in Outburst
Authors: Younes George , Hu Chin-Ping , Bansal Karishma , Ray Paul S. , Pearlman Aaron B. , Kirsten Franz , Wadiasingh Zorawar , Göğüş Ersin , Baring Matthew G. , Enoto Teruaki , Arzoumanian Zaven , Gendreau Keith C. , Kouveliotou Chryssa , Güver Tolga , Harding Alice K. , Majid Walid A. , Blumer Harsha , Hessels Jason W. T. , Gawroński Marcin P. , Bezrukovs Vladislavs , Orbidans Arturs 
Published: January 2022

Abstract
We report on NICER X-ray monitoring of the magnetar SGR 1830−0645 covering 223 days following its 2020 October outburst, as well as Chandra and radio observations. We present the most accurate spin ephemerides of the source so far: ν = 0.096008680(2) Hz,

ν

̇

=
−
6.2
(
1
)
×

10

−
14

Hz s−1, and significant second and third frequency derivative terms indicative of nonnegligible timing noise. The phase-averaged 0.8–7 keV spectrum is well fit with a double-blackbody (BB) model throughout the campaign. The BB temperatures remain constant at 0.46 and 1.2 keV. The areas and flux of each component decreased by a factor of 6, initially through a steep decay trend lasting about 46 days, followed by a shallow long-term one. The pulse shape in the same energy range is initially complex, exhibiting three distinct peaks, yet with clear continuous evolution throughout the outburst toward a simpler, single-pulse shape. The rms pulsed fraction is high and increases from about 40% to 50%. We find no dependence of pulse shape or fraction on energy. These results suggest that multiple hot spots, possibly possessing temperature gradients, emerged at outburst onset and shrank as the outburst decayed. We detect 84 faint bursts with NICER, having a strong preference for occurring close to the surface emission pulse maximum—the first time this phenomenon is detected in such a large burst sample. This likely implies a very low altitude for the burst emission region and a triggering mechanism connected to the surface active zone. Finally, our radio observations at several epochs and multiple frequencies reveal no evidence of pulsed or burst-like radio emission.
Impact of Cosmic Filaments on the Gas Accretion Rate of Dark Matter Halos
Authors: Zhu Weishan , Zhang Fupeng , Feng Long-Long 
Published: January 2022

Abstract
We investigate the impact of cosmic filaments on the gas accretion rate,

M

̇

gas

, of dark matter halos in filaments, based on cosmological hydrodynamic simulation. We find that for halos less massive than 1012.0
M
⊙,

M

̇

gas

of halos residing in prominent filaments (with width D
fil > 3 Mpc h
−1) is lower than halos residing in tenuous filaments (D
fil < 3 Mpc h
−1) by 20%–30% at z = 0.5 and by a factor of 2–3 at z = 0. However,

M

̇

gas

depends weakly on the physical distance between halo center and the spine of filaments from high redshift to z = 0 and only shows a clear difference between the inner and outer regions in prominent filaments at z = 0. We further probe the thermal properties of gas in prominent and tenuous filaments, which appear in relatively highly and intermediate overdense regions, respectively. The gas in prominent filaments is hotter. Around 26%, 38%, and 45% of gases in prominent filaments are hotter than 106 K at z = 1.0, 0.5, and 0.0, respectively. The corresponding fractions in tenuous filaments are merely ∼6%, 9%, and 11%. The suppressed gas accretion rate for low-mass halos in prominent filaments at z ≲ 0.5 may result from the hotter ambient gas, which could provide a physical processing mechanism to cut down the supply of gas to halos before they enter clusters. This process partially meets the need of the preheating mechanism implemented in some semianalytical models of galaxy formation but works only for ∼20% of halos at z < 1.
On the Angular Momentum Transport Efficiency within the Star Constrained from Gravitational-wave Observations
Authors: Qin Ying , Wang Yuan-Zhu , Wu Dong-Hong , Meynet Georges , Song Hanfeng 
Published: January 2022

Abstract
The LIGO Scientific Collaboration and Virgo Collaboration (LIGO/Virgo) have recently reported in GWTC-2.1 eight additional candidate events with a probability of astrophysical origin greater than 0.5 in the LIGO/Virgo’s deeper search on O3a running. In GWTC-2.1, the majority of the effective inspiral spins (χ
eff) show magnitudes consistent with zero, while two (GW190403-051519 and GW190805-211137) of the eight new events have χ
eff > 0 (at 90% credibility). We note that GW190403-051519 was reported with χ
eff =

0.70

−
0.27

+
0.15

and mass ratio q =

0.25

−
0.11

+
0.54

. Assuming a uniform prior probability between 0 and 1 for each black hole’s dimensionless spin magnitude, GW190403-051519 was reported with the dimensionless spin of the more massive black hole, χ
1 =

0.92

−
0.22

+
0.07

. This is the fastest black hole ever measured in all current gravitational-wave events. If the immediate progenitor of GW190403-051519 is a close binary system composed of a black hole and a helium star, which can be the natural outcome of the classical isolated binary evolution through the common envelope phase, this extremely high spin challenges, at least in that case, the existence of an efficient angular momentum transport mechanism between the stellar core and the radiative envelope of massive stars, as for instance predicted by the Tayler–Spruit dynamo or its revised version by Fuller et al.
Thermal and Nonthermal Emission in the Optical-UV Spectrum of PSR B0950+08*
Authors: Abramkin Vadim , Pavlov George G. , Shibanov Yuriy , Kargaltsev Oleg 
Published: January 2022

Abstract
Based on recent Hubble Space Telescope (HST) observations in the far-UV and ground-based observations in optical bands, Pavlov and colleagues have revealed a thermal component in the spectrum of the old pulsar B0950+08 (spin-down age 17.5 Myr) and estimated a neutron star (NS) surface temperature of (1–3) × 105 K. Our new HST observations in the optical have allowed us to resolve the pulsar from a close-by galaxy and measure the optical fluxes more accurately. Using the newly measured fluxes and a new calibration of the HST’s far-UV detector, we fit the optical-UV pulsar’s spectrum with a model that consists of a nonthermal power law (f

ν
∝ ν

α
) and thermal blackbody components. We obtained the spectral slope α = −0.3 ± 0.3, considerably flatter than found from ground-based observations, and the best-fit temperature in the range of (6–12) × 104 K (as seen by a distant observer), depending on interstellar extinction and NS radius. The temperature is lower than reported previously, but still much higher than predicted by NS passive cooling scenarios for such an old pulsar. This means that some heating mechanisms operate in NSs, e.g., caused by the interaction of the faster-rotating neutron superfluid with the slower-rotating normal matter in the inner crust of the NS.
A Scaling for Atmospheric Heat Redistribution on Tidally Locked Rocky Planets
Authors: Koll Daniel D. B. 
Published: January 2022

Abstract
Atmospheric heat redistribution shapes the remote appearance of rocky exoplanets, but there is currently no easy way to predict a planet’s heat redistribution from its physical properties. This paper proposes an analytical scaling theory for the heat redistribution on tidally locked rocky exoplanets. The main parameters of the scaling are a planet’s equilibrium temperature, surface pressure, and broadband longwave optical thickness. The scaling compares favorably against idealized general circulation model simulations of TRAPPIST-1b, GJ1132b, and LHS 3844b. For these planets, heat redistribution generally becomes efficient, and a planet’s observable thermal phase curve and secondary eclipse start to deviate significantly from that of a bare rock, once surface pressure exceeds


(
1
)

bar. The scaling additionally points to planetary scenarios for which heat transport can be notably more or less efficient, such as H2 and CO atmospheres or hot lava ocean worlds. The results thus bridge the gap between theory and imminent observations with the James Webb Space Telescope. They can also be used to parameterize the effect of 3D atmospheric dynamics in 1D models, thereby improving the self-consistency of such models.
Propagation of the Alfvén Wave and Induced Perturbations in the Vicinity of a 3D Proper Magnetic Null Point
Authors: Sabri S. , Ebadi H. , Poedts S. 
Published: January 2022

Abstract
The aim of the present work is to study the propagation of the Alfvén wave around a 3D proper magnetic null point and its accompanying perturbations. In this line, the shock-capturing Godunov-type PLUTO code is used to solve the magnetohydrodynamic (MHD) equations. It is found that the Alfvén wave propagates toward the null point at the fan plane and the wave−wave interaction could be the main reason for the Alfvén wave energy dissipation, ehile, at two other planes including the spine axis, the Alfvén wave spreads toward the spine axis and accumulates along it. Furthermore, the fast magnetoacoustic wave moves toward the null point at the fan plane and also at two other planes including the spine axis. The fast magnetoacoustic wave also refracts around the null point without any significant accumulation along the spine axis. Finally, the slow mode moves toward the null point at the fan plane. It is illustrated that, at the x,z plane, in addition to the refraction of the slow wave around the null point, there is an accumulation of the slow mode along the spine axis, while, at the other plane including the spine axis, the slow magnetoacoustic wave refracts around the null point. Moreover, it is found that the 3D structure results in the high amplitude of MHD wave energy in comparison with the 2.5D structure. Finally, it is found that the Alfvén wave gives its energy to the induced fast and slow magnetoacoustic waves and they have more time to heat the plasma.
Dominique Méda
Authors: Méda Dominique , Cardou Nicolas 
Published: January 2022

La sociologue nous invite à reconstruire nos représentations de l’humain en adoptant un nouveau paradigme (le « prendre soin » en lieu et place de la conquête et de l’exploitation), de nouveaux indicateurs de richesse et une réduction du temps de travail (les 32 heures).
Mac Miller, les démons d’un rappeur inclassable
Authors: Laurent Guillaume 
Published: January 2022

Cet article propose d’investiguer l’histoire et la carrière fulgurante d’une jeune star du hip-hop en lutte avec de funestes problèmes d’addictions. Le tout dans un contexte dramatique de crise des opioïdes aux États-Unis.	Plusieurs éléments cliniques permettant d’approcher la défaillance de certains étayages psychiques, que les consommations compulsives auront tenté de pallier, sont aussi abordés.	En l’absence de biographie, ce travail a été réalisé à partir de l’étude de sa musique, de ses textes et des interviews qu’il a accordées.
La logique de structuration du conseil d’administration des sociétés anonymes non cotées au Cameroun : les résultats d’une étude qualitative exploratoire
Authors: Mfouapon Georges Kriyoss 
Published: January 2022

Dans un contexte où le marché financier est en construction, où il n’existe pas de code de gouvernance des sociétés non cotées et où les actionnaires sont peu exigeants, la composition du conseil d’administration ne reposerait pas sur les mêmes logiques que celles des économies de marchés. Cette recherche vise à comprendre la philosophie de composition du conseil d’administration des sociétés anonymes non cotées au Cameroun. Les données analysées par la technique d’analyse thématique sont collectées par entretiens semi-directifs réalisés avec les principaux membres du conseil d’administration de onze sociétés. Les résultats obtenus montrent que les calculs économiques et les considérations culturelles et sociales guident la composition du conseil d’administration. Ce dernier qui est envisagé comme un cadre de résolution des conflits du « milieu » et d’intégration des boundary spanners s’identifie plus au dirigeant-propriétaire et à la communauté d’encastrement social de l’entreprise.
La dissuasion, libres réflexions sur la grammaire stratégique française
Authors: Catar Lionel 
Published: January 2022

Dans la culture stratégique française, la dissuasion revêt une dimension particulière bien au-delà de la simple « fonction stratégique » des Livres blancs. Elle est en effet le symbole d’un redressement et d’une indé­pendance nationale aboutie. Elle a également fait montre d’une dynamique d’adaptation conceptuelle face aux évolutions du monde. Ce sont autant de points d’ancrage solides pour affronter les défis contemporains : nouveaux champs de conflictualités, variété des pratiques dissuasives et contestation sociétale du nucléaire. Face à ces défis, cet article souhaite questionner la grammaire stratégique française en proposant une réflexion sur les « dissua­sions complémentaires », une présentation renouvelée des fonctions stratégi­ques autour de la notion de « dissuasion intégrale » et un impératif de trans­mission au sein du corps social de cette riche culture stratégique de la dissuasion.
Tecno-ecologías de la presencia y la apertura afroindígena
Authors: Arregui Anibal G. , Canals Roger 
Published: January 2022

En este ensayo proponemos concebir la selva y la red como tecno-ecologías de la presencia, a saber: dispositivos y contextos de relación orientados a hacer presente al Otro. Nos centramos en formas de generar co-presencialidad que, física o virtualmente, preceden al campo comunicativo, es decir, establecen las formas de relación entre los presentes como génesis (no resultado) del medio de comunicación. Comparando algunos de los usos comunicativos que los colectivos Afroindígenas hacen de la selva y la red, nos distanciamos de la idea de «medio de comunicación» como mero mediador tecnológico entre personas. Como alternativa, adoptamos una perspectiva relacional y ontogenética de los medios, atendiendo a cómo relaciones socio-ecológicas crean campos de co-presencialidad y comunicación. Desplazando la atención puesta en la naturaleza técnica de los medios hacia su génesis práctica y transformabilidad social, nuestros casos etnográficos muestran como los medios, en tanto que tecno-ecologías de la presencia, son configurados, reinventados, y permanentemente abiertos a la incorporación de la diferencia.
Spiderman architecte
Authors: Bourdareau Pierre 
Published: January 2022

En 2010, l’agence d’architecture R&Sie(n) exposait une « architecture des humeurs », produite et déterminée par les émotions de ses futurs habitants et sécrétée par une colonie de robots aux allures d’araignées. Par les relations manifestes qui s’exercent entre cette œuvre et le cinéma ou la littérature, nous nous proposons d’explorer les tensions fructueuses entre le pensable et le possible afin d’envisager ce que la fiction permet effectivement de construire.
Écriture épistolaire et éducation humaniste
Authors: Panzera Maria Cristina 
Published: January 2022

L’essor de l’art épistolaire est l’un des aspects du renouveau culturel qui caractérise l’époque humaniste et renaissante. On connaît l’importance de la contribution apportée par Pétrarque à cette nouvelle valorisation de l’écriture épistolaire : nous étudions en particulier le thème de la gloire littéraire dans ses lettres familières par rapport au modèle de Cicéron (notamment le discours Pro Archia). L’enseignement humaniste a su traduire cet idéal intellectuel en un projet éducatif à part entière qui visait, par-delà les aspects rhétoriques de la communication épistolaire, la définition des liens interpersonnels et des codes de comportement en société.
La faculté des lettres de Bordeaux et la mise en place d’un nouvel enseignement supérieur à Bordeaux des années 1880 à l’entre-deux-guerres
Authors: Clavel Elsa 
Published: January 2022

À partir des années 1880, l’enseignement supérieur en France connaît d’importantes mutations liées aux réformes de la Troisième République. La faculté des lettres de Bordeaux, au début du XXe siècle, permet d’observer ces changements qui touchent aux cursus, aux disciplines enseignées. L’humanisme et les humanités, hérités de l’époque moderne, s’y trouvent confronté à la démocratisation progressive de l’accès à l’éducation mais aussi aux changements structurels de la société française.
The Effects of Clofibrate on Neonatal Jaundice
Authors: Eghbalian Fathemeh , Hasanpour-Dehkordi Ali , Raeisi Roya 
Published: January 2022

Background:
Neonatal jaundice is a prevalent disease that causes many complications, including kernicterus and even death. Previous studies have shown that clofibrate as an aryloxy isobutyric acid derivate can be effectively applied for the treatment of neonatal jaundice. Thus, this review was carried out to investigate the effects and mechanism of action of clofibrate on neonatal jaundice.

Methods:
The keywords such as “Clofibrate” in combination with “Neonatal jaundice” or “Neonatal hyperbilirubinemia” or “Newborn Jaundice” were used to search for relevant publications indexed in the Institute for Scientific Information (ISI), Scopus, PubMed, and Google Scholar databases. Finally, after reviewing the studies, 24 papers were included in this study.

Results:
Results showed that the processes of albumin-bound bilirubin transfer to the hepatocytes, hepatic uptake, and storage via ligandin, hepatic conjugation via uridine diphosphate glucuronosyltransferase 1A1 (UGT1A1), conjugation into the bile via MRP2 represent the main action mechanism of clofibrate that turns it into the bilirubin conjugates and expels it from the bile. Besides, clofibrate has been shown to reduce the level of Total Serum Bilirubin (TSB) in infants even at a dosage of 25 mg/kg without leaving side effects.

Conclusions:
The results of this review revealed that clofibrate effectively reduces TSB in short-term usage and can even have a promising effect at the dosage of 25 mg/kg in full-term infants. Most studies have shown this property over a short period in term infants, and there is no evidence about long-term usage in this regard.
Prospective Evaluation of Radiocephalic Arteriovenous Fistula to Determine the Causes for Non Maturity with Clinical and Ultrasonography-Doppler
Authors: Bhuwania Sameer , Goel Rajesh , Bansal Ravi , Saxena Sanjiv 
Published: January 2022

Introduction:
The RC-AVF is the most important tool for hemodialysis considered to be the life line of patients. In our study, we have tried to find the incidence of AVF non maturation and the physical and ultrasonological parameter which can predict its non maturation.

Materials and Methods:
Radio-cephalic AVF surgery was done taking into account the inclusion and exclusion criteria with a follow up period of 6 weeks. The cases were evaluated pre-operatively and post-operatively using clinical and DUS.

Results:
91 cases were studied with a success surgical outcome in 54.9% (50) of patients. The mean age of 46.04 yrs, male sex and less diabetes (46%) was associated with a matured RC-AVF surgical outcome. Mean preoperative artery diameter of > 0.21 ± 0.04 cm and vein diameter of > 0.20 ± 0.03 cm was seen in the matured cases. Incremental test and Resistive index was normal in 62% and 80% of the matured cases respectively, while calcification of feeding artery was associated with poor outcome. Further Clinical examination showed sensitivity 88% and specificity 95% whereas Doppler studies showed a sensitivity of 100% and specificity of 92.6% to successfully diagnose matured cases. Thrombosis (51%) was the most common cause of AVF failure followed by juxta anastomosis stenosis (14%).

Conclusion:
In this study we found that a thorough pre-operative evaluation of the vessels of RC-AVF can predict its maturation. Also a regular follow-up and use of clinical and imaging studies can help diagnose and timely salvage a failing AVF.
Validation of demirjian's 8-teeth method of age estimation in the population of Bengaluru
Authors: Shivakumar Boraiah , Arunakshi  , Niveditha  , Shivaprasad  , Manjuprasad  
Published: January 2022

Introduction:
Demirjian's method of dental age assessment estimates the overall dental age by scoring based on the stage of tooth formation, using panoramic radiographs. This method was primarily based on data acquired from individuals of French-Canadian origin. It has since been applied and modified for the Indian population. Therefore, the aim of the present study is to assess the reliability of the Indian formula in the population of Bengaluru.

Materials and Methods:
Dental maturity of 297 subjects between 9 and 17 years was assessed using the India-specific formula of Demirjian et al.'s 8-teeth method and the chronological age of each subject was calculated. Pearson's correlation, Independent student test/Mann–Whitney test and Chi-square test were used for statistical analysis of the results obtained.

Results and Discussion:
A very strong correlation (P < 0.001) between the chronological and estimated age by Demirjian's method was obtained. The mean absolute error among the total samples was not significant and majority of the error in the estimated age was <1 year in males and females, indicating that the India specific formula gave nearly accurate estimation of the chronological age of the sample subjects.

Conclusion:
Demirjian's Indian formula is relaible in the population of Bengaluru