bluuebunny/crossref_metadata_2025_split huggingface dataset:
Loan classification using logistic regression
Authors: Behunkou U. I. , Kovalyov M. Y. 
Published: April 2023

Objectives. The studied problem of loan classification is particularly important for financial institutions, which must efficiently allocate monetary assets between entities as part of the provision of financial services. Therefore, it is more important than ever for financial institutions to be able to identify reliable borrowers as accurately as possible. At the same time, machine learning is one of the tools for making such decisions. The aim of this work is to analyze the possibility of efficient use of logistic regression for solving the task of loan classification.Methods. Based on the logistic regression algorithm using historical data on loans issued, the following metrics are calculated: cost function, Accuracy, Precision, Recall и score. Polynomial regression and principal component analysis are used to determine the optimal set of input data for the being studied logistic regression algorithm.Results. The impact of data normalization on the final result is estimated, the optimal regularization parameter for solving this problem is determined, the impact of the balance of target values is assessed, the optimal boundary value for the logistic regression algorithm is calculated, the influence of increasing input indicators by means of filling in missing values and using polynomials of different degrees is considered and the existing set of input indicators is analyzed for redundancy.Conclusion. The research results confirm that the application of the logistic regression algorithm for solving loan classification problems is appropriate. The use of this algorithm allows to get quickly a working loan classification tool.
Joint low power state assignment of sequential automata of a net implementing a parallel automaton
Authors: Pottosin Yu. V. 
Published: April 2023

Objectives. The problem of low power state assignment of partial states of a parallel automaton is considered. The objective of the paper is to investigate the possibilities of using the decomposition in state assignment of partial states in order to decrease the task dimension.Methods. Parallel automaton is decomposed into a net of sequential automata whose states are assigned then with ternary vectors. The method for assignment uses searching for a maximal cut in a weighted graph that represents pairs of states connected by transitions. The edge weights of the graph are the values related to the probabilities of transitions.Results. A method to construct a net of sequential automata that realizes the given parallel automaton is described. The probabilities of transitions between sets are calculated by means of solving a system of linear equations according to the Chapmann – Kolmogorov method. The values of inner variables assigned to the states of every component sequential automaton are obtained from two-block partitions of its set of states that are determined by the cuts of corresponding transition graph.Conclusion. Applying parallel automaton decomposition allows decreasing the dimension of the laborious problem of state assignment. The proposed method is intended for application in computer aided systems for design of discrete devices.
Sueño y rendimiento académico: estudio correlacional en niños y adolescentes ecuatorianos durante el confinamiento por covid-19
Authors: Cuadros-López Alejandra , Chiquito-Salguero Freddy , Padilla Paola , Calderón Jose A 
Published: April 2023

El sueño como una necesidad biológica de los seres vivos no solo posibilita la recuperación física y psicológica, también se asocia a funciones cognitivas complejas como la memoria y el aprendizaje. Bajo esa premisa y dados los cambios bruscos en la vida de las personas durante el período de confinamiento por el COVID -19, se desarrolló un estudio para determinar el nivel de correlación entre la calidad del sueño y el rendimiento académico. Participaron 402 niños y adolescentes ecuatorianos de 8 a 15 años. Se utilizó el registro de calificaciones finales de los educandos, se recogieron datos sociodemográficos y se aplicó el Test de Trastornos del Sueño de Bruni para medir cómo y hasta dónde una variable influía sobre la otra. Se encontró una correlación fuerte (0,76; < .001) entre la calidad del sueño y el rendimiento académico y diferencias significativas < .001 en el rendimiento académico de los grupos de escolares que descansaban más y aquellos lo hacían menos.
Creando empresas de valor Fomento a la creación de valor economico y social, desde las empresas en Honduras, Centroamérica
Authors: Coca Singh Carlos David 
Published: April 2023

La situación que estamos viviendo en la sociedad del siglo XXI nos obliga a reflexionar sobre la decadencia moral y la práctica de antivalores en el comportamiento de las personas y como sus acciones inciden negativamente en las relaciones familiares, sociales y laborales, al grado de acentuarse cada día más haciendo cuesta arriba la lucha contra grandes desafíos como la discriminación, la desigualdad, la corrupción y la pobreza extrema.
Consecuentemente han surgido iniciativas a nivel global enmarcadas en los objetivos de desarrollo sostenible (ODS) formalizados e impulsados por la Organización de las Naciones Unidas (ONU), los cuales sirven de base para la creación de estrategias públicas en los países y sectores empresariales privados con los que se pueda dar respuesta a la consecución de estos objetivos trazados al 2030.
Es muy satisfactorio presentar las formas como una empresa bien administrada puede cambiar la vida de las personas que participan en ella, sus propietarios, colaboradores, proveedores directos e indirectos y también generar impactos positivos en la sociedad en su lucha contra los grandes retos mencionados anteriormente.
La alfabetización académica en la educación superior
Authors: Astudillo Calderon Jacqueline Fatima 
Published: April 2023

El propósito de este estudio consiste en describir el perfil del estudiante en cuanto a la lectura y escritura de géneros discursivos en el nivel universitario de la carrera de Pedagogía de la Lengua y Literatura. La investigación se realizó utilizando una metodología cuantitativa y un diseño no experimental de corte transversal. Se aplicó un muestreo no probabilístico por conveniencia a 240 estudiantes universitarios. Los resultados obtenidos sugieren que es necesario que se impartan asignaturas específicas que se dediquen a la formación en lectura y escritura de géneros discursivos en los planes de estudio de los grados universitarios. Además, se debe concientizar a los docentes universitarios sobre la importancia que tiene la lectoescritura en la planificación de los contenidos y la en la atención que se debe brindar.
Causas de un inadecuado clima laboral en empresa electrónica
Authors: Hernandez Mendez Moises , Garcia Treviño Irma Leticia , Ocegueda Mercado Corina Guillermina , Guzman Prince Ileana 
Published: April 2023

El adecuado ambiente laboral dentro de las compañías del giro industrial es fundamentales para su funcionamiento en pro de lograr metas y objetivos anuales las cuales traen como resultados utilidades y crecimiento de la organización. En definitiva el lograr tener un clima laboral estable y adecuado ayudara de muchas maneras a mantener una estabilidad con el recurso humano, disminución de renuncias, así como una pronta adaptación de personal de nuevo ingresos, complementos claros que dan como beneficio una correcta comunicación, ambiente laboral sano, una motivación entre compañeros de áreas y líderes de su equipo así como un eficiente proceso de reclutamiento para una estabilidad y mínima rotación de personal.
Los resultados iniciales demostraron que en términos generales se muestran que las principales causas de un deficiente clima laboral en el área de producción de personal de sindicato son: los constantes movimientos de personal a celdas distintas a sus operaciones, los pocos incentivos y reconocimiento por años laborales, el proceso de selección de personal no es el adecuado y la poca comunicación con su supervisor
El siguiente artículo aborda metodología de la investigación y desarrollo así como recomendaciones para un adecuado clima laboral en una empresa del ramo electrónico.
Revisiting Collisional Dust Growth in Class 0/I Protostellar Disks: Sweep-up Can Convert a Few 10 M
⊕ of Dust into Kilogram Pebbles in 0.1 Myr
Authors: Xu Wenrui , Armitage Philip J. 
Published: April 2023

Abstract
Recent observations suggest that the first stages of planet formation likely take place in the Class 0/I phase of young stellar object evolution, when the star and the disk are still embedded in an infalling envelope. In this study we perform grain coagulation calculations to investigate the very first stage of planet formation, the collisional growth of dust grains, in Class 0/I disks. We find that the slow increase in grain mass by high-velocity collision with much smaller grains (“sweep-up”) allows ∼50 M
⊕ of grains to grow well beyond the fragmentation barrier into ∼kilogram pebbles by the end of Class 0/I (0.1 Myr). We analyze the linear growth and saturation of sweep-up to understand our results quantitatively, and test whether the sweep-up outcome is sensitive to disk parameters and details of the grain coagulation model. The sweep-up pebble population could be important for planet formation, because they are less well-coupled to the gas (compared to the main population below the fragmentation barrier) and therefore more favorable to known mechanisms of dust clump formation (which initiate planetesimal formation). It also contains enough mass to form all planet cores, based on observational estimates of the planet mass budget. Our findings motivate future studies of grain growth and planetesimal formation in Class 0/I disks, including the subsequent evolution of this sweep-up population.
Constraints From Dwarf Galaxies on Black Hole Seeding and Growth Models With Current and Future Surveys
Authors: Chadayammuri Urmila , Bogdán Ákos , Ricarte Angelo , Natarajan Priyamvada 
Published: April 2023

Abstract
Dwarf galaxies are promising test beds for constraining models of supermassive and intermediate-mass black holes (MBHs) via their BH occupation fraction (BHOF). Disentangling seeding from the confounding effects of mass assembly over a Hubble time is a challenging problem that we tackle in this study with a suite of semianalytical models (SAMs). We show how the measured BHOF depends on the lowest BH mass or active galactic nucleus (AGN) luminosity achieved by a survey. To tell seeding models apart, we need to detect or model all AGNs brighter than 1037 erg s−1 in galaxies of M
* ∼ 108−10
M
⊙. Shallower surveys, like eRASS, cannot distinguish between seed models even with the compensation of a much larger survey volume. We show that the AMUSE survey, with its inference of the MBH population underlying the observed AGNs, strongly favors heavy seed models, growing with either a power-law Eddington ratio distribution function or one in which BH accretion is tied to the star formation rate (i.e., the AGN-main sequence, AGN-MS, model). These two growth channels can then be distinguished by the AGN luminosity function at >1040 erg s−1, with the AGN-MS model requiring more accretion than observed at z ∼ 0. Thus, current X-ray observations favor heavy seeds whose Eddington ratios follow a power-law distribution. The different models also predict different radio scaling relations, which we quantify using the fundamental plane of BH activity. We close with recommendations for the design of upcoming multiwavelength campaigns that can optimally detect MBHs in dwarf galaxies.
Abundance Ratios of OH/CO and HCO+/CO as Probes of the Cosmic-Ray Ionization Rate in Diffuse Clouds
Authors: Luo Gan , Zhang Zhi-Yu , Bisbas Thomas G. , Li Di , Zhou Ping , Tang Ningyu , Wang Junzhi , Zuo Pei , Yue Nannan 
Published: April 2023

Abstract
The cosmic-ray ionization rate (CRIR, ζ
2) is one of the key parameters controlling the formation and destruction of various molecules in molecular clouds. However, the current most commonly used CRIR tracers, such as

H

3

+

, OH+, and H2O+, are hard to detect and require the presence of background massive stars for absorption measurements. In this work, we propose an alternative method to infer the CRIR in diffuse clouds using the abundance ratios of OH/CO and HCO+/CO. We have analyzed the response of chemical abundances of CO, OH, and HCO+ on various environmental parameters of the interstellar medium in diffuse clouds and found that their abundances are proportional to ζ
2. Our analytic expressions give an excellent calculation of the abundance of OH for ζ
2 ≤ 10−15 s−1, which are potentially useful for modeling chemistry in hydrodynamical simulations. The abundances of OH and HCO+ were found to monotonically decrease with increasing density, while the CO abundance shows the opposite trend. With high-sensitivity absorption transitions of both CO (1–0) and (2–1) lines from Atacama Large Millimeter/submillimeter Array, we have derived the H2 number densities (

n

H

2

) toward 4 lines of sight; assuming a kinetic temperature of T
k = 50 K, we find a range of (0.14 ± 0.03–1.2 ± 0.1) × 102 cm−3. By comparing the observed and modeled HCO+/CO ratios, we find that ζ
2 in our diffuse gas sample is in the range of

1.0

−
1.0

+
14.8

× 10

−
16

–

2.5

−
2.4

+
1.4

× 10−15 s−1. This is ∼2 times higher than the average value measured at higher extinction, supporting an attenuation of CRs as suggested by theoretical models.
Observed UV Continuum Slopes (β) of Galaxies at z = 0.40–0.75 in the GOODS-North Field
Authors: Mondal Chayan , Saha Kanak , Windhorst Rogier A. , Jansen Rolf A. 
Published: April 2023

Abstract
We estimate the UV continuum slope (β) of 465 galaxies (with luminosities of 0.028–3.3

L

z
=
0.5

*

) in the Great Observatories Origins Survey Northern field in the redshift range z = 0.40–0.75. We use two AstroSat/UVIT (N242W, N245M) bands, two Hubble Space Telescope (F275W, F336W) bands, and a KPNO (U) band to sample the UV continuum slope of selected galaxies between 1215 and 2600 Å. The mean (median) and 1σ scatter in the observed β are found to be −1.33 ± 0.07 ( − 1.32) and 0.60 within the considered redshift range. We do not find any significant evolution in the mean β within our redshift window. Our measurements add new data points to the global β–z relation in the least-explored redshift regime, further reinforcing the gradual reddening of galaxy UV continuum with cosmic time. We notice no strong consistent trend between β and M
1500 for the entire luminosity range −21 <M
1500 < − 15 mag. However, the majority of the most-luminous galaxies (M
1500 < − 19 mag) are found to have relatively redder slopes. Using UVIT, we detect galaxies as faint as M
1500 = − 15.6 mag (i.e., 0.028

L

z
=
0.5

*

). The faintest galaxies (M
1500 > − 16 mag) tend to be redder, which indicates they were less actively forming stars during this cosmic time interval. Our study highlights the unique capability of UVIT near-UV imaging to characterize the rest-frame far-UV properties of galaxies at redshift z ∼ 0.5.
Analysis of the Intranight Variability of BL Lacertae during Its 2020 August Flare
Authors: Agarwal A. , Mihov B. , Agrawal V. , Zola S. , Özdönmez Aykut , Ege Ergün , Slavcheva-Mihova L. , Reichart D. E. , Caton D. B. , Das Avik Kumar 
Published: April 2023

Abstract
We present an analysis of the BVRI photometry of the blazar BL Lacertae on diverse timescales from 2020 mid-July to mid-September. We have used 11 different optical telescopes around the world and have collected data over 84 observational nights. The observations cover the onset of a new activity phase of BL Lacertae that started in 2020 August (termed as the 2020 August flare by us), and the analysis is focused on the intranight variability. On short-term timescales, (i) flux varied with ∼2.2 mag in the R band, (ii) the spectral index was found to be weakly dependent on the flux (i.e., the variations could be considered mildly chromatic), and (iii) no periodicity was detected. On intranight timescales, BL Lacertae was found to predominantly show bluer-when-brighter chromatism. We also found two cases of significant interband time lags of the order of a few minutes. The duty cycle of the blazar during the 2020 August flare was estimated to be quite high (∼90% or higher). We decomposed the intranight light curves into individual flares and determined their characteristics. On the basis of our analysis and assuming the turbulent jet model, we determined some characteristics of the emitting regions: Doppler factor, magnetic field strength, electron Lorentz factor, and radius. The radii determined were discussed in the framework of the Kolmogorov theory of turbulence. We also estimated the weighted mean structure function slope on intranight timescales, related it to the slope of the power spectral density, and discussed it with regard to the origin of intranight variability.
Characterization of Low-mass Companions to Kepler Objects of Interest Observed with APOGEE-N
Authors: Cañas Caleb I. , Bender Chad F. , Mahadevan Suvrath , Bizyaev Dmitry , De Lee Nathan , Fleming Scott W. , Hearty Fred , Majewski Steven R. , Nitschelm Christian , Schneider Donald P. , Serna Javier , Stassun Keivan G. , Stefánsson Guđmundur , Stringfellow Guy S. , Wilson John C. 
Published: April 2023

Abstract
We report the characterization of 28 low-mass (0.02 M
⊙ ≤ M
2 ≤ 0.25 M
⊙) companions to Kepler objects of interest (KOIs), eight of which were previously designated confirmed planets. These objects were detected as transiting companions to Sunlike stars (G and F dwarfs) by the Kepler mission and are confirmed as single-lined spectroscopic binaries in the current work using the northern multiplexed Apache Point Observatory Galactic Evolution Experiment near-infrared spectrograph (APOGEE-N) as part of the third and fourth Sloan Digital Sky Surveys. We have observed hundreds of KOIs using APOGEE-N and collected a total of 43,175 spectra with a median of 19 visits and a median baseline of ∼1.9 yr per target. We jointly model the Kepler photometry and APOGEE-N radial velocities to derive fundamental parameters for this subset of 28 transiting companions. The radii for most of these low-mass companions are overinflated (by ∼10%) when compared to theoretical models. Tidally locked M dwarfs on short-period orbits show the largest amount of inflation, but inflation is also evident for companions that are well separated from the host star. We demonstrate that APOGEE-N data provide reliable radial velocities when compared to precise high-resolution spectrographs that enable detailed characterization of individual systems and the inference of orbital elements for faint (H > 12) KOIs. The data from the entire APOGEE-KOI program are public and present an opportunity to characterize an extensive subset of the binary population observed by Kepler.
GTasb3D: A Novel 3D Framework for Modeling Thermal Evolution and Rarefied Flows in Porous Active Small Bodies with Various Shapes
Authors: Zhang Yun , Hartzell Christine M. 
Published: April 2023

Abstract
Volatiles in small bodies provide important clues to solar system evolution and are of in-situ-resource-utilization interest. Explicit modeling of small bodies’ global thermophysical process is essential to assess volatiles’ evolution and abundance. Previous numerical studies commonly use a finite difference/volume method, which has limited capability in simulating the interior thermal dynamics of small bodies with realistic shapes. Here we developed a novel 3D framework using the generalized finite difference method for modeling thermal evolution of active small bodies (GTasb3D). By fully solving the energy and mass conservation equations using a mesh-free, Cartesian-coordinate-based method, this framework can evaluate the heat and mass transport in a porous cometary body of various shapes. Several tests and comparisons with previous studies have been carried out to verify this framework's accuracy and efficiency. We show that the timescale to achieve thermal equilibrium and the global temperature distribution are in good agreement with previous theoretical and numerical estimates. The GTasb3D simulations show that ice sublimation mainly occurs near the ice front, and parts of the resulting vapor recondense beneath the ice front. The surface gas density dramatically decreases as the ice retreats. For a 1 km radius object located at 3 au with initially homogeneous dust-ice distribution, the depth to ice at the equator is >∼2 cm after ∼10 yr, assuming that a dust mantle is left behind after ice depletion. At this stage, the global gas production rate is below the gas emission detection capability but is capable of lifting submillimeter-sized dust from the nucleus’s near-subsurface.
De la littérature pour développer un regard soignant : l’apport du roman « Réparer les vivants »
Authors: Vonarx Nicolas 
Published: April 2023

L’intégration des humanités dans les formations en sciences de la santé est un moyen d’humaniser les pratiques soignantes. Des sciences humaines et sociales, mais aussi plusieurs médias artistiques, dont la danse, le cinéma, le théâtre et la littérature permettent notamment de rendre compte de la complexité des expériences vécues et d’approfondir la notion de soin. Dans ce texte, nous revenons sur la place et l’utilité de la littérature dans l’enseignement des soignants. Nous proposons d’analyser le roman de Maylis de Kerangal, « Réparer les vivants », qui porte sur le prélèvement d’organes, pour montrer comment ce type de contenu peut aider à approfondir le regard des soignants. Toujours soutenu par le texte comme si ce dernier était un matériel anthropologique récolté sur un terrain, nous ouvrons des portes à faire des thèmes à fortes valeurs phénoménologiques, éthiques, politiques et anthropo-sociologiques, qui pourraient être des lieux de rencontres et de réflexions pédagogiques.
Faut-il une conversion écologique de l’agir politique ?
Authors: Boissier Fabrice 
Published: April 2023

Pour répondre aux défis de la transition écologique, il faut une transformation profonde de l’agir politique. Mais le terme de conversion est-il adéquat pour décrire cette transformation ? Les appels des prophètes à la conversion politique peuvent nous inspirer, à condition de les transposer de manière analogique au contexte moderne. La conversion peut alors être comprise comme la réorientation de l’agir politique lorsqu’il n’est plus aligné avec le bien commun.
La « conversion écologique » : un concept pas si évident en éthique
Authors: Lesch Walter 
Published: April 2023

La contribution cherche à comprendre la fascination pour l’idée d’une conversion écologique qui semble être tellement évidente et reste malgré tout confrontée à une réalité peu favorable à un tel discours et à un véritable changement de comportement. L’utilisation du mot « conversion » évoque un champ sémantique complexe et contaminé, notamment dans le contexte de la communication religieuse. Si l’éthique théologique ne veut pas se contenter de l’exégèse des encycliques, elle doit entrer dans une analyse plus critique des niveaux de l’exhortation, de la motivation et de l’argumentation en dialogue avec les sciences humaines. Une éthique théologique compréhensible et crédible est appelée à sortir de sa bulle convictionnelle pour que l’idée noble d’une conversion écologique devienne opérationnelle.