bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cluster Difference Imaging Photometric Survey. II. TOI 837: A Young Validated Planet in IC 2602
Authors: Bouma L. G. , Hartman J. D. , Brahm R. , Evans P. , Collins K. A. , Zhou G. , Sarkis P. , Quinn S. N. , de Leon J. , Livingston J. , Bergmann C. , Stassun K. G. , Bhatti W. , Winn J. N. , Bakos G. Á. , Abe L. , Crouzet N. , Dransfield G. , Guillot T. , Marie-Sainte W. , Mékarnia D. , Triaud A. H. M. J. , Tinney C. G. , Henning T. , Espinoza N. , Jordán A. , Barbieri M. , Nandakumar S. , Trifonov T. , Vines J. I. , Vuckovic M. , Ziegler C. , Law N. , Mann A. W. , Ricker G. R. , Vanderspek R. , Seager S. , Jenkins J. M. , Burke C. J. , Dragomir D. , Levine A. M. , Quintana E. V. , Rodriguez J. E. , Smith J. C. , Wohler B. 
Published: November 2020

Abstract
We report the discovery of TOI 837b and its validation as a transiting planet. We characterize the system using data from the NASA Transiting Exoplanet Survey Satellite mission, the ESA Gaia mission, ground-based photometry from El Sauce and ASTEP400, and spectroscopy from CHIRON, FEROS, and Veloce. We find that TOI 837 is a T = 9.9 mag G0/F9 dwarf in the southern open cluster IC 2602. The star and planet are therefore

million years old. Combining the transit photometry with a prior on the stellar parameters derived from the cluster color–magnitude diagram, we find that the planet has an orbital period of

and is slightly smaller than Jupiter (

). From radial velocity monitoring, we limit

to less than 1.20 M
Jup (3σ). The transits either graze or nearly graze the stellar limb. Grazing transits are a cause for concern, as they are often indicative of astrophysical false-positive scenarios. Our follow-up data show that such scenarios are unlikely. Our combined multicolor photometry, high-resolution imaging, and radial velocities rule out hierarchical eclipsing binary scenarios. Background eclipsing binary scenarios, though limited by speckle imaging, remain a 0.2% possibility. TOI 837b is therefore a validated adolescent exoplanet. The planetary nature of the system can be confirmed or refuted through observations of the stellar obliquity and the planetary mass. Such observations may also improve our understanding of how the physical and orbital properties of exoplanets change in time.
Spectroscopic Analysis of the Bulge Globular Cluster ESO 456-SC38*
Authors: Kunder Andrea M. , Butler Evan 
Published: November 2020

Abstract
It has been suggested that the oldest stellar populations in the Milky Way are tightly bound and confined to the central regions of the Galaxy. This is one of the reasons why a handful of globular clusters located in the bulge region are thought to be remnants of the primeval formation stages of the Milky Way. The globular cluster, ESO 456-SC38 (Djorgovski 2), is one such cluster; it has a blue horizontal branch, is projected very close to the center of the Galaxy, and has an orbit confining it to the bulge/bar region. The first α abundances of seven stars in this heavily reddened cluster are presented using Apache Point Observatory Galaxy Evolution Experiment Data Release 16. A significant spread in the abundances of N, C, Na, and Al indicates the presence of multiple stellar populations in this cluster. Using Gaia DR2 proper motions and radial velocities from the Bulge Radial Velocity Assay for RR Lyrae stars, we confirm that RR Lyrae stars belong to this globular cluster.
The MAVERIC Survey: Radio Catalogs and Source Counts from Deep Very Large Array Imaging of 25 Galactic Globular Clusters
Authors: Shishkovsky Laura , Strader Jay , Chomiuk Laura , Tremou Evangelia , Tudor Vlad , Miller-Jones James C. A. , Bahramian Arash , Heinke Craig O. , Maccarone Thomas J. , Sivakoff Gregory R. 
Published: November 2020

Abstract
The MAVERIC survey is the first deep radio continuum imaging survey of Milky Way globular clusters, with a central goal of finding and classifying accreting compact binaries, including stellar-mass black holes. Here we present radio source catalogs for 25 clusters with ultra-deep Karl G. Jansky Very Large Array observations. The median observing time was 10 hr per cluster, resulting in typical rms sensitivities of 2.3 and 2.1 μJy per beam at central frequencies of 5.0 and 7.2 GHz, respectively. We detect nearly 1300 sources in our survey at 5σ, and while many of these are likely to be background sources, we also find strong evidence for an excess of radio sources in some clusters. The radio spectral index distribution of sources in the cluster cores differs from the background, and shows a bimodal distribution. We tentatively classify the steep-spectrum sources (those much brighter at 5.0 GHz) as millisecond pulsars and the flat-spectrum sources as compact or other kinds of binaries. These provisional classifications will be solidified with the future addition of X-ray and optical data. The outer regions of our images represent a deep, relatively wide-field (∼0.4 deg2) and high-resolution C band background survey, and we present source counts calculated for this area. We also release radio continuum images for these 25 clusters to the community.
Fluctuation Amplitudes of Magnetic-field Directional Turnings and Magnetic-velocity Alignment Structures in the Solar Wind
Authors: Wang Xin , Tu Chuanyi , He Jiansen 
Published: November 2020

Abstract
Magnetic-field directional turning (MFDT) and magnetic-velocity alignment structure (MVAS) are two typical types of structures in the solar wind. However, their fluctuation amplitudes in different turbulence states have not been studied before. Here, we present the amplitude distributions of MFDTs and MVASs in the

plane, where

is the correlation coefficient between magnetic-field and velocity fluctuations multiplied by the sign of the x component of the mean field in geocentric solar ecliptic coordinates, and σ

r
is normalized residual energy. Measurements from the WIND spacecraft in the slow solar wind during 2005–2009 are used for the analysis. The data are cut into intervals with duration of 6 minutes, and the intervals that are nearly incompressible are selected for analysis. We find that for the fluctuations with

and −1 < σ

r
< −0.6, which are considered to be associated with MFDTs, the level contours of the pixel average amplitude of magnetic-field fluctuations in the plane show a horizontal-stripe feature with approximately

km s−1 in Alfvén units. For the fluctuations with

and −0.9 < σ

r
< −0.2, which are considered to be associated with MVASs, the level contours of the pixel average amplitude of velocity fluctuations show a vertical stripe feature with approximately

km s−1. Consequently, the level contours of the pixel average amplitudes of Elsässer variables

show “U” and “W” shapes, respectively. These results will help us to understand the nature of the fluctuations in the solar wind.
TESS Photometry of the Precataclysmic Variable Wolf 1130AB
Authors: Honaker Easton J. , Mace Gregory N. , Han Eunkyu , Hussaini Maryam , Lubar Emily 
Published: November 2020

Abstract
Wolf 1130 is a triple system containing an ultramassive white dwarf (Wolf 1130B), an M subdwarf (Wolf 1130A) and a T8 subdwarf (Wolf 1130C). We set out to determine a precise mass for Wolf 1130B by phase-folding TESS photometry to the previously reported orbital period. Each orbit was fit for ellipsoidal, Doppler beaming, and thermal photometric variability. We found that the measured beaming amplitude of Wolf 1130AB is nearly triple the theoretical expectation, which we assign to the short-wavelength filter cutoff of TESS and features in the M subdwarf spectrum. The photometric amplitudes suggest inflation of Wolf 1130A by as much as 20%, possibly due to its rapid rotation under tidal locking. TESS photometry can be used to obtain masses for short-period binary systems, but photometric precision limits the utility in the case of Wolf 1130AB.
A Photometric Hα Survey of the Open Cluster M29
Authors: Schmidtke Paul , Hunter Tim 
Published: November 2020

Abstract
Photometric B, V, R, and Hα observations of the young open cluster M29 have been used to search for emission-line stars. Four stars with prominent Hα emission are identified. One of these may be a Herbig AeBe star that shows significant variation in emission strength during the four-month observing interval.
Épigramme et identité étrangère en Eubée : entre disparition des traits locaux et développement de langues de genre
Authors: Dell’Oro Francesca 
Published: November 2020

Dans cette contribution on aborde la question de la manière dont des étrangers ont exprimé leur altérité à travers des moyens linguistiques (alphabet, dialecte, adjectifs indiquant la provenance, etc.) dans les épigrammes épigraphiques au fil des siècles. Comme première étude de cas, on a choisi l’Eubée antique. Cette région offre sur un total de 38 épigrammes un sous-corpus de 8 poèmes (funéraires) pour lesquels l’origine étrangère des défunts est explicitée. Si, dans les inscriptions les plus anciennes (v e siècle av. J.-C.), alphabets et dialectes semblent être chargés d’une valeur identitaire, la disparition ultérieure des traits locaux n’est pas compensée par un autre moyen d’expression de l’identité locale et culturelle dans les siècles suivants. À l’époque hellénistique, l’épigramme acquiert véritablement la dimension d’un genre littéraire et les dialectes ont commencé à être utilisés comme l’une des caractéristiques de ce genre. Bien que ces traits dialectaux aient pu être employés pour exprimer l’identité, nous n’avons pas d’exemples de cette pratique dans le corpus.
Quand le recensement comptait les Français musulmans
Authors: Escafré-Dublet Angéline , Kesztenbaum Lionel , Simon Patrick 
Published: November 2020

En période de forte demande de main d’œuvre, mais aussi et surtout parce que leur statut de citoyen de l’Union française leur donne la libre circulation depuis 1946, de nombreux Algériens se rendent en France après la fin de la Seconde Guerre mondiale. Or cette migration nourrit les inquiétudes des pouvoirs publics et les expose à un ensemble de traitements spécifiques – le plus souvent discriminatoires – l’un d’entre eux étant leur identification dans le recensement, principale source de connaissance statistique des populations. En dérogation à la loi et au cadre égalitaire métropolitain, l’Insee met en œuvre, en 1954 et 1962, une méthode de reconnaissance onomastique pour distinguer les Algériens présents en France – dont la catégorie administrative la plus utilisée est « Français musulmans d’Algérie » – alors même que leur statut juridique est identique à celui des autres Français, et ainsi constituer des statistiques ethno-religieuses, en rupture avec les usages en matière de recensement.
Expertise, indicateurs de qualité et rationalisation de l’hôpital : le pouvoir discret de la « nébuleuse intégratrice »
Authors: Bertillot Hugo 
Published: November 2020

Dans l’ombre du déploiement d’instruments inspirés des logiques du New Public Management , des indicateurs conçus pour évaluer la qualité hospitalière se sont généralisés depuis une quinzaine d’années. Cet article est centré sur le travail de légitimation de ces indicateurs par divers experts : chercheurs en gestion, experts au sein des fédérations hospitalières, de sociétés savantes médicales ou d’organismes régionaux d’évaluation. Situés à l’interface de l’administration hospitalière et des mondes hospitaliers locaux, ces experts constituent une nébuleuse interconnectée d’acteurs multi-positionnés, qui a contribué activement à l’intégration institutionnelle du secteur.
Associations among Household Animal Ownership, Infrastructure, and Hygiene Characteristics with Source Attribution of Household Fecal Contamination in Peri-Urban Communities of Iquitos, Peru
Authors: Schiaffino Francesca , Rengifo Trigoso Dixner , Colston Josh M. , Paredes Olortegui Maribel , Shapiama Lopez Wagner V. , Garcia Bardales Paul F. , Pisanic Nora , Davis Meghan F. , Penataro Yori Pablo , Kosek Margaret N. 
Published: November 2020

ABSTRACTUsing previously validated microbial source tracking markers, we detected and quantified fecal contamination from avian species and avian exposure, dogs, and humans on household cooking tables and floors. The association among contamination, infrastructure, and socioeconomic covariates was assessed using simple and multiple ordinal logistic regressions. The presence ofCampylobacterspp. in surface samples was linked to avian markers. Using molecular methods, animal feces were detected in 75.0% and human feces in 20.2% of 104 households. Floors were more contaminated than tables as detected by the avian markerAv4143, dog markerBactcan, and human markerBachum. Wood tables were consistently more contaminated than non-wood surfaces, specifically with the mitochondrial avian markersND5and CytB, fecal marker Av4143, and canine markerBactcan. Final multivariable models with socioeconomic and infrastructure characteristics included as covariates indicate that detection of avian feces and avian exposure was associated with the presence of chickens, maternal age, and length of tenancy, whereas detection of human markers was associated with unimproved water source. Detection ofCampylobacterin surface samples was associated with the avian fecal marker Av4143. We highlight the critical need to detect and measure the burden of animal fecal waste when evaluating household water, hygiene, and sanitation interventions, and the possibility of decreasing risk of exposure through the modification of surfaces to permit more effective household disinfection practices. Animals may be a more important source of household fecal contamination than humans in many low-resource settings, although interventions have historically focused almost exclusively on managing human waste.
Mark Tulij Cicero
Authors: Ciceron Mark Tulij , Zlobec Barbara 
Published: November 2020

Pro Archia je obrambni sodni govor, ki ga je Mark Tulij Ciceron imel poleti leta 62 pr. Kr. Takrat je že dosegel višek svoje kariere in slave, saj je bil leto prej kot konzul odkril in zadušil zaroto, ki so jo snovali razvpiti patricij Katilina in njegovi pristaši.
Pesnika Arhijo je neki Gratij obtožil, da si je nezakonito pridobil državljanske pravice; za ta prestopek je bilo pristojno stalno sodišče z izžrebano poroto (quaestio perpetua de civitate). Sodni primer je bil nezahteven in Ciceron je verjetno Arhijevo obrambo sprejel iz prijateljskega nagiba. Dokaze o Arhijevi nedolžnosti je Ciceron izpostavil pravzaprav samo v prvem delu govora, v nadaljevanju pa se je osredotočil na proslavljanje poezije in na pomen kulture za posameznika in za družbo; že sam Ciceron je začutil, da je zaigral na register, ki tradicionalno ni bil značilen za sodno, pač pa za epidejktično govorništvo, zato se je čutil dolžnega, da izbiro razloži in opraviči.
Preparation and Characterization of Carboxymethylated and Cross-Linked Enset Starch as a Disintegrant in Tablets
Authors: Mengesha Yohannes , Belete Anteneh , Gebre-Mariam Tsige 
Published: November 2020

Starch and modified starches have been commonly employed as excipient in pharmaceutical industry. The use of non-modified or “native” starch, However, is mostly confined due to limitation in several physicochemical properties. Cross-linked sodium carboxymethyl starch which is also known as sodium starch glycolate is extensively used in fast dissolving tablets to disperse the drugs within short span of time. In this study, enset starch was carboxymethylated and subsequently cross-linked. Carboxymethyl enset starch (CMES) was obtained by reacting enset starch and monochloroacetic acid (MCA) in the presence of sodium hydroxide. CMESs having different degree of substitution (DS) were cross-linked at variousconcentrations (2.5, 5 and 10% w/w) of sodium hexametaphosphate (SHMP) to provide sodium starch glycolate of enset starch (SSG-E). The fourier transform infrared (FTIR) spectra confirmed the presence of carboxymethylated group in the modified starch granules with new band at 1608.52 cm-1. This dually modified enset starch (SSG-E) was evaluated as a potential disintegrant in paracetamol tablets in comparison with commercially available sodium starch glycolate, Disegel. Carboxymethylation was significantly influenced by reaction medium, reaction temperature and reaction time (p < 0.05). CMES with higher DS (0.437 ± 0.03) exhibited higher peak viscosity than CMES with lower DS (0.224 ± 0.01). Despite exhibiting greater swelling power, CMES showed significantly lower pasting viscosity compared to the native starch (p < 0.05). At 2.5% SHMP, the dually modified starch (SSG-E) exhibited significant increase in swelling but its rate of water-uptake was lower than that of Disegel. As the SHMP concentration wasincreased from 2.5 to 5%, the swelling power decreased significantly (p < 0.05). When the concentration was increased to 10% the swelling power increased significantly (p < 0.05). At 2.5% SHMP concentration SSG-E showed a viscosity comparable to that of CMES. As the concentration of SHMP increased to 5 and to 10% w/w, significant decrease in viscosity (p < 0.05) was observed. Compared to the native enset starch (NES), the solubility of SSG-E was more than 4-fold, but its viscosity was much lower than that of CMESs. The SSG-E exhibited lower moisture sorption than CMES but higher sorption than NES. SSG-E showed good flowability, superior swelling power and solubility than NES. The disintegration time (DT) of paracetamol tablets containing SSG-E as a disintegrant was comparable to those tablets with similar concentration of Disegel. At 4% SSG-E, paracetamol tablets exhibited DT less than 1 min.
Keywords: carboxymethylation, degree of cross-linking, enset starch, paracetamol tablets, sodium starch glycolate
<I>In Vitro</I> Antioxidant and Antimicrobial Activities of Methanol Leaf Extract and Fractions of <I>Afzelia bella</I>Harms (Fabaceae)
Authors: Ofeimun Josephine , Afolabi James , Dowe Ejiro , Erhauyi Osayemwenre , Bafor Enitome , Amaechina Fabian , Ayinde Buniyamin 
Published: November 2020

Afzelia bella Harms (Fabaceae), a plant widely distributed in Africa, is used in traditional medicine for varied disease conditions including the treatment of topical skin infections. The present study investigated the antimicrobial and antioxidant activities of the methanol extract and various solvent fractions of the leaves of the plant. The methanol leaf extract was partitioned to yield petroleum ether, chloroform, ethyl acetate and residual aqueous fractions. Total phenol and flavonoid contents, radical scavenging activity and ferric reduction antioxidant power (FRAP) were determined by spectrophotometry, while antimicrobial activity and minimum inhibitory concentration (MIC) of the extract and fractions were determined using agar-well diffusion and agar dilution methods, respectively against clinical bacterial isolates of Bacillus subtilis, Escherishia coli, Klebsiella pneumoniae, Staphylococcus aureus, and fungi, Aspergillus flavus, Candida parapsilosis, Microsporium audiounii. Bacillus subtilis was the most susceptible among the bacterial strains tested, while Microsporium audiounii was the most susceptible fungus. The alcoholic extract and all solvent fractions demonstrated a concentration dependent antimicrobial activity with inhibition zone diameter range of 7.5 to 35.0 mm. MIC ranged from 0.1 - 8 mg/ml and activity was highest in ethyl acetate fraction with MIC of 0.1 mg/ml. FRAP ranged from 0.161 - 0.319 mmol Fe2+/g extract and was highest in the ethyl acetate fraction. These results give an indication that A. bella leaf has high antioxidant and antimicrobial activities and support the folkloric claim of the therapeutic potential of the plant.
Keywords: antioxidant, antimicrobial, ethnomedicine, Afzelia bella, Fabaceae
Geochemical evaluation of Campanian-Maastritchian clay-shale sediments of Patti formation, Southern Bida and Mamu Formation, northern Anambra basins
Authors: Atabo Nathaniel Odoma , Sunday Ojochogwu Idakwo 
Published: November 2020

Two basins (Southern Bida and Northern Anambra Basins) were investigated to deduce weathering, paleooxygenation, provenance, depositional environment and tectonic setting, as well as to establish a relationship between the two basins. The obtained high values of calculated weathering indices such as Chemical index of alteration (CIA > 90), Chemical Index of Weathering (CIW > 90), Plagioclase Index of Alteration (PIA > 90) and the Al2O3-(CaO + Na2O)-K2O ternary relationship for the clay – shale sediments from both basins indicate intense weathering in the source area. Important geochemical ratios such as V/Cr, Cu/Zn, Ni/Co, (Cu+Mo)/Zn, revealed predominantly oxic conditions for the clay – shale sediments from both basins, although, a more reducing or an anoxic condition cannot be ruled out for the clay – shale sediments from the Southern Bida basin due to high ratios of U/Th (1.93-5.67) and Cu/Zn (0.19-5.00). In addition, the Sr/Ba ratios (0.16–3.50) for the clay-shales from the Southern Bida basin indicated an alternated marine and continental paleo-depositional settings and only continental setting (Sr/Ba ratios = 0.22 – 0.50) for the Northern Anambra basin. The Th/Sc, La/Sc, Th/Co and the LREE/HREE ratios showed a derivation of the shale and clay deposits from similar felsic-rich source rock while the log of (K2O/Na2O) vs SiO2, revealed a Passive Margin tectonic setting for the two Basins. There is insignificant differences between the geochemical classifications, weathering, source rock/provenance and tectonic settings of clay-shale sediments of both sedimentary basins, however, there exist slight disparity in their salinity conditions and redox settings.
Keywords: Geochemistry, Clay-shale, Provenance, Tectonic Setting, Northern Anambra and Southern Bida Basins
Automatic water level control system using discretized components
Authors: Big-Alabo A , Isaac C 
Published: November 2020

This study is based on the design of a portable automatic water level control switch that is capable of switching on the pump when the water level in the overhead tank goes low and switches it off as soon as the water level reaches a pre-determined level to prevent dry-run of the pump in case the level in the underground tank goes below the suction level. The water in the tank is measured by the conductive probes and displaced via the LED indicators. At maximum-set capacity the pump is de-energized to automatically switch off, thereby stopping the inflow of water into the tank. The design approach involves three major stages which are: the power supply unit, the sensing unit, and the motoring and relay unit. The uniqueness of this work is the use of discrete components such as transistors to achieve water level control. This approach is more economical, simpler and easier to implement than the sophisticated programmable logic controllers and computerized microprocessors.
Keywords: discrete components; conductive probes; sensors; relays; pump
Estimation of annual erosion in six soil series of the Federal University of Agriculture Abeokuta Nigeria using Rusle in Map Algebra
Authors: Oyedepo J.A. , Olawale R.A. , Oluyege D.E. , Babajide E.I. 
Published: November 2020

Anthropogenic activities such as deforestation, bush burning and extensive opening of farmlands in the 10,000 hectares at the Federal University of Agriculture, Abeokuta (FUNAAB) have increased vulnerabilities of the seven soil series in the campus to agents of erosion. Therefore it is important to evaluate the rate and locations of soil erosion in the study area inorder to develop erosion control intervention programme using standard methods. The results show that overall soil erosion ranges from 0 to 167.8 tons per hectare per annum. 10% of University land now has high risk of soil erosion being grasslands exposed to annual fires. Soil erosion is pronounced in the two soil series (Oke-imesi and Apomu) that are found along river fringes with topographic factors (Slope length and steepness) playing major role in the soil erosion.
Keywords: Soil series; Erosion; Map algebra; Spatial mode