cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Study of 2021 outburst of the recurrent nova RS Ophiuchi: Photoionization and morpho-kinematic modelling
Creators: name: Pandey, Ruchi
name: Habtie, Gesesew R.
name: Bandyopadhyay, Rahul
name: Das, Ramkrishna
name: Teyssier, François
name: Flo, Joan Guarro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the evolution of the optical spectra of the 2021 outburst of RS Ophiuchi (RS Oph) over about a month after the outburst. The spectral evolution is similar to the previous outbursts. Early spectra show prominent P Cygni profiles of hydrogen Balmer, \ion{Fe}{ii}, and \ion{He}{i} lines. The emission lines were very broad during the initial days, which later became narrower and sharper as the nova evolved. This is interpreted as the expanding shocked material into the winds of the red giant companion. We find that the nova ejecta expanded freely for $\sim 4$ days, and afterward, the shock velocity decreased monotonically with time as $v\propto t^{-0.6}$. The physical and chemical parameters associated with the system are derived using the photoionization code \textsc{cloudy}. The best-fit \textsc{cloudy} model shows the presence of a hot central white dwarf source with a roughly constant luminosity of $\sim$1.00 $\times$ 10$^{37}$ erg s$^{-1}$. The best-fit photoionization models yield absolute abundance values by number, relative to solar of He/H $\sim 1.4 - 1.9$, N/H = $70 - 95$, O/H = $0.60 - 2.60$, and Fe/H $\sim 1.0 - 1.9$ for the ejecta during the first month after the outburst. Nitrogen is found to be heavily overabundant in the ejecta. The ejected hydrogen shell mass of the system is estimated to be in the range of $3.54 - 3.83 \times 10^{-6} M_{\odot}$. The 3D morpho-kinematic modelling shows a bipolar morphology and an inclination angle of $i=30^{\circ}$ for the RS Oph binary system.
description: 16 Pages, 7 figures, Accepted for publication in Monthly Notices of the Royal Astronomical Society (MNRAS) on 19 July 2022
Quantifying kinematic substructure in star-forming regions with statistical tests of spatial autocorrelation
Creators: name: Arnold, Becky
name: Wright, Nicholas J.
name: Parker, Richard J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate whether spatial-kinematic substructure in young star-forming regions can be quantified using Moran's $I$ statistic. Its presence in young star clusters would provide an indication that the system formed from initially substructured conditions, as expected by the hierarchical model of star cluster formation, even if the cluster were spatially smooth and centrally concentrated. Its absence, on the other hand, would be evidence that star clusters form monolithically. The Moran's $I$ statistic is applied to $N$-body simulations of star clusters with different primordial spatial-velocity structures, and its evolution over time is studied. It is found that this statistic can be used to reliably quantify spatial-kinematic substructure, and can be used to provide evidence as to whether the spatial-kinematic structure of regions with ages $\lesssim$ 6 Myr is best reproduced by the hierarchical or monolithic models of star formation. Moran's $I$ statistic is also able to conclusively say whether the data are $not$ consistent with initial conditions that lack kinematic substructure, such as the monolithic model, in regions with ages up to, and potentially beyond, 10 Myrs. This can therefore provide a kinematic signature of the star cluster formation process that is observable for many Myr after any initial spatial structure has been erased.
description: 14 pages, 10 figures, accepted for publication in MNRAS
Do Bureaucrats Contribute to the Resource Curse? Evidence from a Survey Experiment in New Oil States
Creators: name: Sigman, Rachel
name: Harris, Adam S.
name: Meyer-Sahling, Jan-Hinrik
name: Mikkelsen, Kim Sass
name: Schuster, Christian
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Molecular Biology
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: The resource curse literature argues that oil production reshapes the fiscal contract between citizens and the state: politicians become less responsive to citizen taxpayers and more likely to use public revenues for their own benefit. This paper examines whether and how bureaucrats influence this breakdown of the fiscal contract. Analysing results of a survey experiment conducted with government employees in Ghana and Uganda, we find that, when primed to think about oil revenue, bureaucrats do not generally express attitudes indicating that they contribute to the resource curse. Although oil revenue does lead some Ghanaian bureaucrats to become less interested in responding to taxpayers, this finding does not operate as predicted, i.e. by bureaucrats expressing greater partiality towards the ruling elite. Instead, we attribute this outcome to ‘disgruntled employees’ – political outsiders with low salaries – who, unlikely to benefit from oil revenue, become disaffected from citizen service. The results shed new light on processes through which resource extraction changes state institutions.
A machine learning based approach to gravitational lens identification with the International LOFAR Telescope
Creators: name: Rezaei, S.
name: McKean, J. P.
name: Biehl, M.
name: de Roo1, W.
name: Lafontaine, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We present a novel machine learning based approach for detecting galaxy-scale gravitational lenses from interferometric data, specifically those taken with the International LOFAR Telescope (ILT), which is observing the northern radio sky at a frequency of 150 MHz, an angular resolution of 350 mas and a sensitivity of 90 uJy beam-1 (1 sigma). We develop and test several Convolutional Neural Networks to determine the probability and uncertainty of a given sample being classified as a lensed or non-lensed event. By training and testing on a simulated interferometric imaging data set that includes realistic lensed and non-lensed radio sources, we find that it is possible to recover 95.3 per cent of the lensed samples (true positive rate), with a contamination of just 0.008 per cent from non-lensed samples (false positive rate). Taking the expected lensing probability into account results in a predicted sample purity for lensed events of 92.2 per cent. We find that the network structure is most robust when the maximum image separation between the lensed images is greater than 3 times the synthesized beam size, and the lensed images have a total flux density that is equivalent to at least a 20 sigma (point-source) detection. For the ILT, this corresponds to a lens sample with Einstein radii greater than 0.5 arcsec and a radio source population with 150 MHz flux densities more than 2 mJy. By applying these criteria and our lens detection algorithm we expect to discover the vast majority of galaxy-scale gravitational lens systems contained within the LOFAR Two Metre Sky Survey.
description: Accepted to be published by MNRAS
Achillea nobilis subsp. nobilis
Creators: name: Info Flora
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Asterales
Asteraceae
Achillea
Achillea nobilis
Achillea nobilis l. subsp. nobilis

description: Achillea nobilis L. subsp. nobilis
Unterart ISFS: 2050 Checklist: 1000375 Asteraceae Achillea Achillea nobilis L. Achillea nobilis L. subsp. nobilis
Bestimmungsschlüssel
ZusammenfassungKEINE ANGABE
Status Nationale Priorität: --
Internationale Verantwortung: --
Ökologie
Lebensraum Lebensraumnach Delarze & al. 2015
KEINE ANGABE
Ökologische Zeigerwerte nach Landolt & al. (2010)
BodenfaktorenKlimafaktorenSalztoleranzFeuchtezahl F--Lichtzahl L--Salzzeichen--Reaktionszahl R--Temperaturzahl T--Nährstoffzahl N--Kontinentalitätszahl K--
Nomenklatur
Gültiger Name (Checklist 2017):Achillea nobilisL. subsp.nobilis
Volksname
Deutscher Name: -- Nom français: -- Nome italiano: --
Übereinstimmung mit anderen Referenzwerken
RelationNomReferenzwerkeNo=Achillea nobilis L. subsp. nobilisChecklist 20172050
= Taxon stimmt mit akzeptiertem Taxon überein (Checklist 2017)  Taxon enthält (neben anderen) auch das akzeptierte Taxon (Checklist 2017)
Kommentare aus der Checklist 2017 Neue Unterart: Die Art wurde bisher (SISF-2) nicht in Unterarten aufgeteilt oder die Unterteilung wurde bisher nicht akzeptiert. Im Gebiet der Checklist 2017 kommt nur diese Unterart vor. Sie ist der Unterart A. n. subsp. neilreichii (A. Kern.) Velen. aus dem Mittelmeerraum gegenübergestellt. Die Zuordnung zur Unterart sollte nur erfolgen, wenn ihre Bestimmung als solche sichergestellt ist. Checklist
Status Indigenat: Indigen
Liste der gefährdeten Pflanzen IUCN(nach Walter & Gillett 1997): Nein Status Rote Liste national
KEINE ANGABE
Status nationale Priorität /Verantwortung
Nationale Priorität--Massnahmenbedarf--Internationale Verantwortung--Überwachung Bestände--
Schutzstatus
Kein internationaler, nationaler oder kantonaler Schutz
description: Published as part of Info Flora, 2021,
Dremomys pyrrhomerus
Creators: name: Wilson, Don E.
name: Thomas E. Lacher, Jr
name: Mittermeier, Russell A.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Rodentia
Sciuridae
Dremomys
Dremomys pyrrhomerus

description: 30. Red-hipped Squirrel Dremomys pyrrhomerus French: Ecureuil a hanches rousses / German: Rothiiftenhérnchen / Spanish: Ardilla de flancos rojos Taxonomy. Sciurus pyrrhomerus Thomas, 1895, “Ichang, Yang-tse-kiang [river] [Hu- pei, China].” Two subspecies are recognized. Subspecies and Distribution. D.p.pyrrhomerusThomas,1895—S&CChina(Sichuan,Guizhou,Hunan,Hubei,Anhui,Guangxi,Guangdong,Jiangxi,extremeWFujian)andextremeNVietnam. D. p. riudonensisJ. A. Allen, 1906 — Hainan 1 Descriptive notes. Head-body 194-210 mm, tail 140-162 mm; weight c.245 g. The Red-hipped Squirrel has a conspicuous red patch on each thigh, and entire underside of tail is vivid red. Nominate subspecies pyrrhomerus has conspicuous reddish patches on thighs, but no red on head; riudonensis also has conspicuous reddish hip patches, but its head is completely red. Habitat. Holes in rocky terrain and similar habitats. The Red-hipped Squirrelis spottily distributed within the landscape. Food and Feeding. There is no information available for this species. Breeding. There is no information available for this species. Activity patterns. The Red-hipped Squirrel is almost entirely terrestrial and is recorded as being fairly inactive during the winter season. Movements, Home range and Social organization. There is no information available for this species. Status and Conservation. Classified as Least Concern on The IUCN Red List. The Redhipped Squirrel has a wide distribution, a presumed large population, and occurs in a number ofprotected areas. It has been regionally Red Listed in China as Near Threatened. Bibliography. Moore & Tate (1965), Smith & Johnston (2008x), Smith & Yan Xie (2008), Thorington et al. (2012), Wang Sung & Yan Xie (2004).
description: Published as part of Don E. Wilson, Thomas E. Lacher, Jr & Russell A. Mittermeier, 2016, Sciuridae, pp. 648-837 in Handbook of the Mammals of the World – Volume 6 Lagomorphs and Rodents I, Barcelona :Lynx Edicions on page 723, DOI: 10.5281/zenodo.6840226
A Survey of Deuterated Ammonia in the Cepheus Star-Forming Region L1251
Creators: name: Galloway-Sprietsma, Maria
name: Shirley, Yancy L.
name: Di Francesco, James
name: Keown, Jared
name: Scibelli, Samantha
name: Sipilä, Olli
name: Smullen, Rachel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Understanding the chemical processes during starless core and prestellar core evolution is an important step in understanding the initial stages of star and disk formation. This project is a study of deuterated ammonia, o-NH$_2$D, in the L1251 star-forming region toward Cepheus. Twenty-two dense cores (twenty of which are starless or prestellar, and two of which have a protostar), previously identified by p-NH$_3$ (1,1) observations, were targeted with the 12m Arizona Radio Observatory telescope on Kitt Peak. o-NH$_2$D J$_{\rm{K_a} \rm{K_c}}^{\pm} =$ $1_{11}^{+} \rightarrow 1_{01}^{-}$ was detected in 13 (59\%) of the NH$_3$-detected cores with a median sensitivity of $σ_{T_{mb}} = 17$ mK. All cores detected in o-NH$_2$D at this sensitivity have p-NH$_3$ column densities $> 10^{14}$ cm$^{-2}$. The o-NH$_2$D column densities were calculated using the constant excitation temperature (CTEX) approximation while correcting for the filling fraction of the NH$_3$ source size. The median deuterium fraction was found to be 0.11 (including 3$σ$ upper limits). However, there are no strong, discernible trends in plots of deuterium fraction with any physical or evolutionary variables. If the cores in L1251 have similar initial chemical conditions, then this result is evidence of the cores physically evolving at different rates.
description: 18 pages, 14 figures, MNRAS, in press
If you Build it, will they come? Use of Rural Drinking Water Systems in the Peruvian Amazon
Creators: name: Nelson-Nuñez, Jami
name: Mostafa, Simón
name: Mahoney, Ryan B.
name: Linden, Karl G.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Space Science
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy

description: While organisations across the world struggle to extend access to the 522 million living in rural areas without clean water, those who do have access do not necessarily use it. This paper explores why, within areas that have public taps with treated water, some individuals continue to use water from untreated sources. We focus on non-use of available rural water supply systems as well as inconsistent use, a phenomenon typically overlooked. Based on surveys in 12 rural communities with water systems in the Peruvian Amazon and qualitative interviews, this study finds community meeting attendance is important for consistent use as attendance increases social influence and reinforces information about the importance of clean water. Non-users are more likely to be those living furthest from the water source and with lower levels of education. Findings point to ways in which community approaches to heath interventions may be more likely to reach some – those with stronger ties to communities, who live closer and have higher levels of education – than others.
Achillea oxyloba Sch. Bip.
Creators: name: Info Flora
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Asterales
Asteraceae
Achillea
Achillea oxyloba

description: Achillea oxyloba (DC.) Sch. Bip.
Art ISFS: 2100 Checklist: 1000380 Asteraceae Achillea Achillea oxyloba (DC.) Sch. Bip.
Bestimmungsschlüssel
ZusammenfassungKEINE ANGABE
Ökologie
Lebensraum Lebensraumnach Delarze & al. 2015
KEINE ANGABE
Ökologische Zeigerwerte nach Landolt & al. (2010)
BodenfaktorenKlimafaktorenSalztoleranzFeuchtezahl F--Lichtzahl L--Salzzeichen--Reaktionszahl R--Temperaturzahl T--Nährstoffzahl N--Kontinentalitätszahl K--
Nomenklatur
Gültiger Name (Checklist 2017):Achillea oxyloba(DC.) Sch. Bip.
Volksname
Deutscher Name: -- Nom français: -- Nome italiano: --
Übereinstimmung mit anderen Referenzwerken
RelationNomReferenzwerkeNo=Achillea oxyloba (DC.) Sch. Bip.Checklist 20172100=Achillea oxyloba (DC.) Sch. Bip.Index synonymique 19962100=Achillea oxyloba (DC.) Sch. Bip.Landolt 19773187=Achillea oxyloba (DC.) Sch. Bip.SISF/ISFS 22100
= Taxon stimmt mit akzeptiertem Taxon überein (Checklist 2017)  Taxon enthält (neben anderen) auch das akzeptierte Taxon (Checklist 2017)
Status Indigenat: -
Liste der gefährdeten Pflanzen IUCN(nach Walter & Gillett 1997): Nein
description: Published as part of Info Flora, 2021,
Mode of Globalization and Manufacturing Firm Closure in Cameroon
Creators: name: Njikam, Ousmanou
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy
subject: Plant Biology

description: This paper investigates the role of three modes of globalisation – exporting, importing intermediate inputs and foreign ownership – on firm closure. No work has been done examining the complementarity/substitutability of these three globalisation modes on firm closure in a least-developed country. We use firm-level data from Cameroon and find that exporting and importing are beneficial, exports are more important in affecting firm survival than imports and foreign-owned firms tend to have shorter lives. The results highlight the importance of taking complementarity/substitutability of globalisation modes into account when analysing firms’ exit probabilities, while exporting and importing are substitutes in their effects on firm failure.
Neutron diffraction in MnSb2O6: Magnetic and structural domains in a helicoidal polar magnet with coupled chiralities
Creators: name: Chan, E.
name: Pásztorová, J.
name: Johnson, R. D.
name: Songvilay, M.
name: Downie, R. A.
name: Bos, J-W. G.
name: Fabelo, O.
name: Ritter, C.
name: Beauvois, K.
name: Niedermayer, Ch.
name: Cheong, S. -W.
name: Qureshi, N.
name: Stock, C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: MnSb$_{2}$O$_{6}$ is based on the structural chiral $P$321 space group #150 where the magnetic Mn$^{2+}$ moments ($S=5/2$, $L\approx 0$) order antiferromagnetically at $T_\mathrm{N}=12$ K. Unlike the related iron based langasite (Ba$_3$NbFe$_3$Si$_2$O$_{14}$) where the low temperature magnetism is based on a proper helix characterized by a time-even pseudoscalar `magnetic' chirality, the Mn$^{2+}$ ions in MnSb$_{2}$O$_{6}$ order with a cycloidal structure at low temperatures, described instead by a time-even vector `magnetic' polarity. A tilted cycloidal structure has been found [M. Kinoshita et al. Phys. Rev. Lett. 117, 047201 (2016)] to facilitate ferroelectric switching under an applied magnetic field. In this work, we apply polarized and unpolarized neutron diffraction analyzing the magnetic and nuclear structures in MnSb$_{2}$O$_{6}$ with the aim of understanding this magnetoelectric coupling. We find no evidence for a helicoidal magnetic structure with one of the spin envelope axes tilted away from the cycloidal $c$-axis. However, on application of a magnetic field $\parallel$ $\vec{c}$ the spin rotation plane can be tilted, giving rise to a cycloid-helix admixture that evolves towards a distorted helix (zero cycloidal component) for fields great than $\approx$ 2 T. We propose a mechanism for the previously reported ferroelectric switching based on coupled structural and magnetic chiralities requiring only an imbalance of structural chiral domains.
Backtracing the internal rotation history of the $β$ Cep star HD 129929
Creators: name: Salmon, Sébastien
name: Moyano, Facundo
name: Eggenberger, Patrick
name: Haemmerlé, Lionel
name: Buldgen, Gaël
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: HD 129929 is a slowly-rotating $β$ Cephei pulsator with a rich spectrum of detected oscillations, including two rotational multiplets. The asteroseismic interpretation revealed the presence of radial differential rotation in this massive star of $\sim$9.35 M . The stellar core is indeed estimated to spin $\sim$3.6 times faster than the surface. The surface rotation was consequently derived as $\sim$2 km/s. This massive star represents an ideal counter-part to the wealth of space-based photometry results for main-sequence and evolved low-mass stars. Those latter have revealed a new, and often unexpected, picture of the angular momentum transport processes acting in stellar interiors. We investigate in a new way the constraints on the internal rotation of HD 129929, focusing on their interpretation for the evolution of the internal rotation during the main sequence of a massive star. We test separately hydrodynamic and magnetic instability transport processes of angular momentum. We used the best asteroseismic model obtained in an earlier work. We calibrated stellar models including rotation, with different transport processes, to reproduce that reference model. We then looked whether one process is favoured to reproduce the rotation profile of HD 129929, based on the fit of the asteroseismic multiplets. The impact of the Tayler magnetic instability on the angular momentum transport predicts a ratio of the core-to-surface rotation rate of only 1.6, while the recently revised prescription of this mechanism predicts solid-body rotation. Both are too low in comparison with the asteroseismic inference. The models with only hydrodynamic processes are in good agreement with the asteroseismic measurements. Strikingly, we can also get a constraint on the profile of rotation on the zero age main sequence: likely, the ratio between the core and surface rotation was at least $\sim$1.7.
description: 5 pages, 3 figures, accepted for publication as a letter in A&A
DIGITIZATION OF RETAIL BANKING SERVICES AND DEVELOPMENT OF ONLINE BANKING PRACTICES
Creators: name: Israilov Qudratjon Zakirovich
Publisher: name: Zenodo
Year: 2024

description: The article explores retail banking services, their significance, and their advancements amid digital transformation. Utilizing data from 14 commercial banks in Uzbekistan, it includes 280 observations. The dependent variable is the deposit activities of commercial banks, while the independent variables are the credit activities, remote services, and plastic card services of these banks, analyzed through various models. The research indicates that among three models analyzed using panel data, the Random Effects Estimator (REE) model, represented by the equation Y=0.59x1+0.08x2+0.22x3-1.66, is the most optimal for assessing the development of retail banking services in the national economy. The Hausman test is employed to choose between the Fixed Effects Estimator (FEE) model and the Random Effects Estimator (REE) model, by comparing their estimates and checking for statistical significance. If the p-value exceeds 0.05, the REE model is preferred as it accounts for unobserved heterogeneity, unlike the FEE model. In this analysis, the p-value from the Hausman test is 0.36, higher than 0.05, leading to the preference for the REE model to evaluate the impact of retail banking services development. Consequently, it is concluded that the REE model is appropriate for this analysis.
The WQN algorithm to adaptively correct artifacts in the EEG signal
Creators: name: Dora, Matteo
name: Jaffard, Stéphane
name: Holcman, David
Publisher: name: arXiv
Year: 2022
Subjects: subject: Methodology (stat.ME)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Wavelet quantile normalization (WQN) is a nonparametric algorithm designed to efficiently remove transient artifacts from single-channel EEG in real-time clinical monitoring. Today, EEG monitoring machines suspend their output when artifacts in the signal are detected. Removing unpredictable EEG artifacts would thus allow to improve the continuity of the monitoring. We analyze the WQN algorithm which consists in transporting wavelet coefficient distributions of an artifacted epoch into a reference, uncontaminated signal distribution. We show that the algorithm regularizes the signal. To confirm that the algorithm is well suited, we study the empirical distributions of the EEG and the artifacts wavelet coefficients. We compare the WQN algorithm to the classical wavelet thresholding methods and study their effect on the distribution of the wavelet coefficients. We show that the WQN algorithm preserves the distribution while the thresholding methods can cause alterations. Finally, we show how the spectrogram computed from an EEG signal can be cleaned using the WQN algorithm.
Quasi-periodic Gaussian Processes for stellar activity: from physical to kernel parameters
Creators: name: Nicholson, Belinda A.
name: Aigrain, Suzanne
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In recent years, Gaussian Process (GP) regression has become widely used to analyse stellar and exoplanet time-series data sets. For spotted stars, the most popular GP covariance function is the quasi-periodic (QP) kernel, whose the hyperparameters of the GP have a plausible interpretation in terms of physical properties of the star and spots. In this paper, we test the reliability of this interpretation by modelling data simulated using a spot model using a QP GP, and the recently proposed quasi-periodic plus cosine (QPC) GP, comparing the posterior distributions of the GP hyperparameters to the input parameters of the spot model. We find excellent agreement between the input stellar rotation period and the QP and QPC GP period, and very good agreement between the spot decay timescale and the length scale of the squared exponential term. We also compare the hyperparameters derived from light and radial velocity (RV) curves for a given star, finding that the period and evolution timescales are in good agreement. However, the harmonic complexity of the GP, while displaying no clear correlation with the spot properties in our simulations, is systematically higher for the RV than for the light curve data. Finally, for the QP kernel, we investigate the impact of noise and time-sampling on the hyperparameters in the case of RVs. Our results indicate that good coverage of rotation period and spot evolution time-scales is more important than the total number of points, and noise characteristics govern the harmonic complexity.
description: 18 pages, 24 figures. Accepted for publication in the Monthly Notices of the Royal Astronomical Society
The Gender-Differential Effect of Financial Inclusion on Household Financial Resilience
Creators: name: Sakyi-Nyarko, Carlos
name: Ahmad, Ahmad Hassan
name: Green, Christopher J.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Marine Biology
subject: Science Policy
subject: Computational Biology

description: This paper applies the kernel propensity score matching difference-in-differences method to examine gender-differential effects of financial inclusion on household financial resilience, using repeated cross-sectional data from two successive large-scale surveys of Ghanaian households. Applying standardised indices for financial inclusion and financial resilience, we find that financial inclusion significantly improves household financial resilience. Results from gender and locality disaggregated analyses suggest that the effect of financial inclusion on household resilience does not significantly vary by gender or locality. Results from different measures of financial inclusion show that savings and formal account ownership yield more pronounced resilience effect, with mobile money (m-money) exerting the least impact. Remittances via m-money – sending and receiving (a proxy for social capital) – provide significant financial resilience effects, with generally stronger effects in rural than in urban areas, especially for females.
The VMC Survey -- XLIX. Discovery of a population of quasars dominated by nuclear dust emission behind the Magellanic Clouds
Creators: name: Pennock, Clara M.
name: van Loon, Jacco Th.
name: Anih, Joy O.
name: Maitra, Chandreyee
name: Haberl, Frank
name: Sansom, Anne E.
name: Ivanov, Valentin D.
name: Cowley, Michael J.
name: Afonso, José
name: Antón, Sonia
name: Cioni, Maria-Rosa L.
name: Craig, Jessica E. M.
name: Filipović, Miroslav D.
name: Hopkins, Andrew M.
name: Nanni, Ambra
name: Prandoni, Isabella
name: Vardoulaki, Eleni
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Following the discovery of SAGE0536AGN ($z \sim$ 0.14), with the strongest 10-$μ$m silicate emission ever observed for an Active Galactic Nucleus (AGN), we discovered SAGE0534AGN ($z \sim$ 1.01), a similar AGN but with less extreme silicate emission. Both were originally mistaken as evolved stars in the Magellanic Clouds. Lack of far-infrared emission, and therefore star-formation, implies we are seeing the central engine of the AGN without contribution from the host galaxy. They could be a key link in galaxy evolution. We used a dimensionality reduction algorithm, t-SNE (t-distributed Stochastic Neighbourhood Embedding) with multi-wavelength data from Gaia EDR3, VISTA survey of the Magellanic Clouds, AllWISE and the Australian SKA Pathfinder to find these two unusual AGN are grouped with 16 other objects separated from the rest, suggesting a rare class. Our spectroscopy at SAAO/SALT and literature data confirm at least 14 of these objects are extragalactic ($0.13 < z < 1.23$), all hosting AGN. Using spectral energy distribution fitter CIGALE we find that the majority of dust emission ($> 70 \%$) in these sources is due to the AGN. Host galaxies appear to be either in or transitioning into the green valley. There is a trend of a thinning torus, increasing X-ray luminosity and decreasing Eddington ratio as the AGN transition through the green valley, implying that as the accretion supply depletes, the torus depletes and the column density reduces. Also, the near-infrared variability amplitude of these sources correlates with attenuation by the torus, implying the torus plays a role in the variability.
description: accepted for publication in MNRAS
If you Build it, will they come? Use of rural Drinking Water Systems in the Peruvian Amazon
Creators: name: Nelson-Nuñez, Jami
name: Mostafa, Simón
name: Mahoney, Ryan B.
name: Linden, Karl G.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Space Science
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy

description: While organisations across the world struggle to extend access to the 522 million living in rural areas without clean water, those who do have access do not necessarily use it. This paper explores why, within areas that have public taps with treated water, some individuals continue to use water from untreated sources. We focus on non-use of available rural water supply systems as well as inconsistent use, a phenomenon typically overlooked. Based on surveys in 12 rural communities with water systems in the Peruvian Amazon and qualitative interviews, this study finds community meeting attendance is important for consistent use as attendance increases social influence and reinforces information about the importance of clean water. Non-users are more likely to be those living furthest from the water source and with lower levels of education. Findings point to ways in which community approaches to heath interventions may be more likely to reach some – those with stronger ties to communities, who live closer and have higher levels of education – than others.
The initial magnetic criticality of prestellar cores
Creators: name: Priestley, Felix D.
name: Yin, Charles
name: Wurster, James
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Direct observational measurements of the magnetic field strength in prestellar cores typically find supercritical mass-to-flux ratios, suggesting that the magnetic field is insufficient to prevent gravitational collapse. These measurements suffer from significant uncertainties; an alternative approach is to utilise the sensitivity of prestellar chemistry to the evolutionary history, and indirectly constrain the degree of magnetic support. We combine non-ideal magnetohydrodynamic simulations of prestellar cores with time-dependent chemistry and radiative transfer modelling, producing synthetic observations of the model cores in several commonly-observed molecular lines. We find that molecules strongly affected by freeze-out, such as CS and HCN, typically have much lower line intensities in magnetically subcritical models compared to supercritical ones, due to the longer collapse timescales. Subcritical models also produce much narrower lines for all species investigated. Accounting for a range of core properties, ages and viewing angles, we find that supercritical models are unable to reproduce the distribution of CS and N$_2$H$^+$ line strengths and widths seen in an observational sample, whereas subcritical models are in good agreement with the available data. This suggests that despite presently having supercritical mass-to-flux ratios, prestellar cores form as magnetically subcritical objects.
description: 10 pages, 10 figures. MNRAS accepted
Extreme blazars: the result of unstable recollimated jets?
Creators: name: Tavecchio, F.
name: Costa, A.
name: Sciaccaluga, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Extreme BL Lacs (EHBL) form a subclass of blazars which challenge standard emission scenarios. In a recent study it has been argued that their peculiar properties can be explained if emitting electrons are accelerated in a series of oblique shocks induced by the recollimation of the relativistic jet. However, new 3D simulations of recollimated, weakly magnetized jets reveal that, in correspondence with the first recollimation shock, the flow develops a rapidly growing instability, becomes highly turbulent and decelerates, effectively hampering the formation of the multiple shock structure routinely observed in 2D simulations. Building on these new findings, we propose here a revised scenario for EHBL, in which the emission is produced by electrons accelerated at the recollimation shock and subsequently further energized through stochastic acceleration in the turbulent downstream flow. We apply a simple version of this scenario to the prototypical EHBL 1ES 0229-200, showing that the SED can be satisfactorily reproduced with standard values of the main physical parameters.
description: 6 pages, 4 figures, accepted by MNRAS
The magnetic field of the chemically peculiar star V352Peg
Creators: name: Fréour, L.
name: Neiner, C.
name: Landstreet, J. D.
name: Folsom, C. P.
name: Wade, G. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a spectropolarimetric analysis of the hot star V352Peg. We have acquired 18 spectropolarimetric observations of the star with ESPaDOnS at the CFHT between 2018 and 2019 and completed our dataset with one archival ESPaDOnS measurement obtained in 2011. Our analysis of the spectra shows that the star is on the main sequence and chemically peculiar, i.e. it is a Bp star, with overabundances of iron peak elements (Ti, Cr and Fe) and underabundance of He and O. Through a Least-Square Deconvolution of each spectrum, we extracted the mean Zeeman signature and mean line profile of thousands of spectral lines and detected a magnetic field in V352Peg. By modelling the Stokes I and V profiles and using the Oblique Rotator Model, we determined the geometrical configuration of V352Peg. We also performed Zeeman-Doppler Imaging (ZDI) to provide a more detailed characterization of the magnetic field of V352Peg and its surface chemical distributions. We find a magnetic field that is mainly dipolar, dominantly poloidal, and largely non-axisymmetric with a dipole field strength of $\sim$9 kG and a magnetic axis almost perpendicular to the rotation axis. The strong variability of Stokes I profiles also suggests the presence of chemical spots at the stellar surface.
description: 18 pages, 15 figures. Accepted for publication in MNRAS
Reionization time of the Local Group and Local-Group-like halo pairs
Creators: name: Sorce, Jenny G.
name: Ocvirk, Pierre
name: Aubert, Dominique
name: Gottloeber, Stefan
name: Shapiro, Paul R.
name: Dawoodbhoy, Taha
name: Yepes, Gustavo
name: Ahn, Kyungjin
name: Iliev, Ilian T.
name: Lewis, Joseph S. W.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Patchy cosmic reionization resulted in the ionizing UV background asynchronous rise across the Universe. The latter might have left imprints visible in present day observations. Several numerical simulation-based studies show correlations between reionization time and overdensities and object masses today. To remove the mass from the study, as it may not be the sole important parameter, this paper focuses solely on the properties of paired halos within the same mass range as the Milky Way. For this purpose, it uses CoDaII, a fully-coupled radiation hydrodynamics reionization simulation of the local Universe. This simulation holds a halo pair representing the Local Group, in addition to other pairs, sharing similar mass, mass ratio, distance separation and isolation criteria but in other environments, alongside isolated halos within the same mass range. Investigations of the paired halo reionization histories reveal a wide diversity although always inside-out given our reionization model. Within this model, halos in a close pair tend to be reionized at the same time but being in a pair does not bring to an earlier time their mean reionization. The only significant trend is found between the total energy at z = 0 of the pairs and their mean reionization time: pairs with the smallest total energy (bound) are reionized up to 50 Myr earlier than others (unbound). Above all, this study reveals the variety of reionization histories undergone by halo pairs similar to the Local Group, that of the Local Group being far from an average one. In our model, its reionization time is ~625 Myr against 660+/-4 Myr (z~8.25 against 7.87+/-0.02) on average.
description: Accepted for publication in MNRAS, 11 pages, 5 figures
Sundasciurus tahan
Creators: name: Wilson, Don E.
name: Thomas E. Lacher, Jr
name: Mittermeier, Russell A.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Rodentia
Sciuridae
Sundasciurus
Sundasciurus tahan

description: 44. Upland Squirrel Sundasciurus tahan French: Ecureuil du Tahan / German: Tahan-Hérnchen / Spanish: Ardilla de tierras altas Taxonomy. Sciurus tahan Bonhote, 1908, “Gunong Tahan,” (Malaysia). This species is monotypic. Distribution. Mt Tahan and other peaks in Peninsular Malaysia. Descriptive notes. Head-body 155 mm, tail 104 mm. No specific data are available for body weight. Dorsum of the Upland Squirrel is speckled brownish with whitetipped guard hairs, venter is gray, and tail is annulated. The Upland Squirrel is similar to the Slender Squirrel (S. tenuis), but is darker and larger. Habitat. Montane and lower montane forests. Food and Feeding. There is no information available for this species. Breeding. There is no information available for this species. Activity patterns. There is no specific information available for this species, but the Upland Squirrel is diurnal. Movements, Home range and Social organization. There is no information available for this species. Status and Conservation. The Upland Squirrel is not yet assessed as a distinct species on The IUCN Red Lust. Bibliography. den Tex et al. (2010), Thorington et al. (2012).
description: Published as part of Don E. Wilson, Thomas E. Lacher, Jr & Russell A. Mittermeier, 2016, Sciuridae, pp. 648-837 in Handbook of the Mammals of the World – Volume 6 Lagomorphs and Rodents I, Barcelona :Lynx Edicions on page 727, DOI: 10.5281/zenodo.6840226
Hard X-Ray broadband spectroscopy of Mrk 876: characterizing its spectrum
Creators: name: Bottacini, Eugenio
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Ever since the launch of the NuSTAR mission, the hard X-ray range is being covered to an unprecedented sensitivity. This range encodes the reflection features arising from active galactic nuclei (AGN). Especially, the reflection of the primary radiation off the accretion disk carries the features of the manifestation of General Relativity described by the Kerr metric due to rotating supermassive black holes (SMBHs). We show the results of the broadband analyses of Mrk 876. The spectra exhibit the signature of a Compton hump at energies above 10 keV and a broadened and skewed excess at energies ~6 keV. We establish this spectral excess to be statistically significant at 99.71% (~3sigma) that is the post-trail probability through Monte Carlo simulations. Based on the spectral fit results and the significance of spectral features the relativistic reflection model is favored over the distant reflection scenario. The excess at ~6 keV has a complex shape that we try to recover along with the Compton hump through a self-consistent X-ray reflection model. This allows inferring an upper limit to the black hole spin of a<0.85, while the inclination angle of the accretion disk results in i=32.84 (+12.22\-8.99) degrees, which is in agreement within the errors with a previous independent measurement (i=15.4 (+12.1/-6.8) degrees). While most spin measurements are biased toward high spin values, the black hole mass of Mrk~876 (2.4x10^8 Msun < M < 1.3x10^9 Msun) lies in a range where moderately spinning SMBHs are expected. Moreover, the analyses of twelve Chandra observations reveal for the first time X-ray variability of Mrk876 with an amplitude of 40%.
description: accepted MNRAS
Fast Prograde Coronal Flows in Solar Active Regions
Creators: name: Hudson, Hugh S.
name: Mulay, Sargam M.
name: Fletcher, Lyndsay
name: Docherty, Jennifer
name: Fitzpatrick, Jimmy
name: Pike, Eleanor
name: Strong, Morven
name: Chamberlin, Phillip C.
name: Woods, Thomas N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the discovery and characterization of high-speed (>100 km/s) horizontal flows in solar active regions, making use of the Sun-as-a-star spectroscopy in the range 5-105 nm provided by the EVE (Extreme Ultraviolet Variability Experiment) spectrometers on the Solar Dynamics Observatory. These apparent flows are persistent on time scales of days, and are well observed in lines of Mg X, Si XII and Fe XVI for example. They are prograde, as evidenced directly by blueshifts/redshifts peaking at the east/west limb passages of isolated active regions. The high-speed flow behavior does not depend upon active-region latitude or solar cycle, with similar behavior in Cycles 24 and 25.
Multifractal cross-correlations of bitcoin and ether trading characteristics in the post-COVID-19 time
Creators: name: Wątorek, Marcin
name: Kwapień, Jarosław
name: Drożdż, Stanisław
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Econometrics (econ.EM)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Applications (stat.AP)
subject: FOS: Economics and business
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Unlike price fluctuations, the temporal structure of cryptocurrency trading has seldom been a subject of systematic study. In order to fill this gap, we analyse detrended correlations of the price returns, the average number of trades in time unit, and the traded volume based on high-frequency data representing two major cryptocurrencies: bitcoin and ether. We apply the multifractal detrended cross-correlation analysis, which is considered the most reliable method for identifying nonlinear correlations in time series. We find that all the quantities considered in our study show an unambiguous multifractal structure from both the univariate (auto-correlation) and bivariate (cross-correlation) perspectives. We looked at the bitcoin--ether cross-correlations in simultaneously recorded signals, as well as in time-lagged signals, in which a time series for one of the cryptocurrencies is shifted with respect to the other. Such a shift suppresses the cross-correlations partially for short time scales, but does not remove them completely. We did not observe any qualitative asymmetry in the results for the two choices of a leading asset. The cross-correlations for the simultaneous and lagged time series became the same in magnitude for the sufficiently long scales.