bluuebunny/crossref_metadata_2025_split huggingface dataset:
Tb3+ and Bi3+ Co-Doping of Lead-Free Cs2NaInCl6 Double Perovskite Nanocrystals for Tailoring Optical Properties
Authors: Yu Yang , Zhou Wei , Li Cheng , Han Peigeng , Li Hui , Zhao Kun 
Published: January 2023

Lead halide perovskites have achieved remarkable success in various photovoltaic and optoelectronic applications, especially solar cells and light-emitting diodes (LEDs). Despite the significant advances of lead halide perovskites, lead toxicity and insufficient stability limit their commercialization. Lead-free double perovskites (DPs) are potential materials to address these issues because of their non-toxicity and high stability. By doping DP nanocrystals (NCs) with lanthanide ions (Ln3+), it is possible to make them more stable and impart their optical properties. In this work, a variable temperature hot injection method is used to synthesize lead-free Tb3+-doped Cs2NaInCl6 DP NCs, which exhibit a major narrow green photoluminescence (PL) peak at 544 nm derived from the transition of Tb3+ 5D4→7F5. With further Bi3+ co-doping, the Tb3+-Bi3+-co-doped Cs2NaInCl6 DP NCs are not only directly excited at 280 nm but are also excited at 310 nm and 342 nm. The latter have a higher PL intensity because partial Tb3+ ions are excited through more efficient energy transfer channels from the Bi3+ to the Tb3+ ions. The investigation of the underlying mechanism between the intrinsic emission of Cs2NaInCl6 NCs and the narrow green PL caused by lanthanide ion doping in this paper will facilitate the development of lead-free halide perovskite NCs.
Magnetic domain control and its dependence on aspect ratio and thickness in Ni nanolayer patterns for nanowire spintronic devices
Authors: Gu Zhe-Rui , Hara Shinjiro 
Published: January 2023

Abstract
We investigate the aspect ratio and thickness dependence of magnetic domain formation in multiple types of ferromagnetic Ni nanolayer electrode patterns. Controlling magnetic domains is critical for spintronic devices using a group IV semiconductor, e.g. Si and Ge, nanowire as the electrodes with magnetic tunnel junction require parallel and anti-parallel magnetization configurations. Single magnetic domains are obtained in the Ni nanolayer electrode patterns on SiO2/Si substrate with an aspect ratio of 20 and a thickness of 40 nm even under the as-deposition condition, while other electrode patterns are mostly showing multiple magnetic domains. The results obtained by magnetic force microscopy also show that the magnetization switching is observed in the electrode pattern with a single magnetic domain. The results in this study show that the suitable design of the dimensions of nanolayer patterns is key to constructing a single magnetic domain in a ferromagnetic electrode for nanowire spintronic devices.
Red emission from InGaN active layer grown on nanoscale InGaN pseudosubstrates
Authors: Cai Wentao , Wang Jia , Park Jeong-Hwan , Furusawa Yuta , Cheong Heajeong , Nitta Shugo , Honda Yoshio , Pristovsek Markus , Amano Hiroshi 
Published: January 2023

Abstract
We demonstrated nanoplatelet In
x
Ga1−x
N pseudosubstrates with In content varying from 0 to 0.3 on low-dislocation-density GaN substrates. These nanoplatelets efficiently relax in-plane strain, thus allowing for the use of a thick active layer to reduce built-in polarization. The 15 nm thick InGaN active layers grown under the same conditions on these nanoplatelets showed a remarkable cathodoluminescence redshift from 460 to 617 nm, suggesting enhanced In incorporation efficiency in InGaN nanoplatelets with higher In content. Moreover, the 617 nm-emitting sample presented an imperceptible blueshift under excitation-power-dependent photoluminescence, indicating a weak polarization field introduced by the high-In-content pseudosubstrates and the thick active layer.
DFT-D3 study of two-dimensional polymerization of C60 crystal under high pressure
Authors: Murata Hidenobu 
Published: January 2023

Abstract
The high-pressure behavior of a monomer and 2D polymerized C60 crystals were investigated using DFT-D3 calculations. Although covalent bonds were not observed in monomer

P
a

3
¯

upon simple compression, C60 moieties in two-dimensional polymer phases (Immm and

R

3
¯

m

phases) exhibited intermolecular electron density, which indicates the formation of covalent bonds between C60 moieties. The C60 crystals were highly compressed under high pressure; however, small compression was observed at the C60 moieties. Both internal energies and PV terms contributed similarly to enthalpy. The deformation of crystals prevented polymerization. These results suggested a different behavior from that of typical inorganic materials.
FOREIGN PRACTICE OF REGIONAL SUPPORT OF SMALL AND MEDIUM-SIZED BUSINESSES IN THE CONTEXT OF A PANDEMIC CRISIS
Authors: Сергиенко Н.С. 
Published: January 2023

В научной статье рассматриваются механизмы финансовой поддержки субъектов малого и среднего предпринимательства, реализуемые в условиях пандемии коронавируса в разных странах. В работе на основе комплексного анализа проведена группировка мер поддержки территориальных органов государственной власти, на основе которой сделаны предложения по формированию лучшей практики поддержки малого и среднего бизнеса в условиях кризиса пандемии.
The scientific article is devoted to the consideration of financial support mechanisms for small and medium-sized businesses implemented in the context of the coronavirus pandemic in different countries. In the work, based on a comprehensive analysis, a grouping of support measures for territorial public authorities was carried out, on the basis of which proposals were made for the formation of best practices for supporting small and medium-sized businesses in the conditions of the pandemic crisis.
Investigating the Narrow-line Region Dynamics in Nearby Active Galaxies
Authors: Meena Beena , Crenshaw D. Michael , Schmitt Henrique R. , Revalski Mitchell , Chapman Zo , Fischer Travis C. , Kraemer Steven B. , Robinson Justin H. , Falcone Julia , Polack Garrett E. 
Published: January 2023

Abstract
We present dynamical models of the narrow-line region (NLR) outflows in the nearby Seyfert galaxies Mrk 3, Mrk 78, NGC 1068, and NGC 4151 using observations from the Hubble Space Telescope and Apache Point Observatory. We employ long-slit spectroscopy to map the spatially resolved outflow and rotational velocities of the ionized gas. We also perform surface brightness decompositions of host galaxy images to constrain the enclosed stellar mass distributions as functions of distance from the supermassive black holes (SMBHs). Assuming that the NLR gas is accelerated by active galactic nuclei (AGN) radiation pressure, and subsequently decelerated by the host galaxy and SMBH gravitational potentials, we derive outflow velocity profiles where the gas is launched in situ at multiple distances from the SMBH. We find a strong correlation between the turnover (from acceleration to deceleration) radii from our models, with the turnovers seen in the observed velocities and spatially resolved mass outflow rates for the AGN with bolometric luminosities > 1044 erg s−1. This consistency indicates that radiation pressure is the dominant driving mechanism behind the NLR outflows in these moderate-luminosity AGNs, with a force multiplier ∼500 yielding the best agreement between the modeled and observed turnover radii. However, in Meena et al. we found that this trend may not hold at lower luminosities, where our modeled turnover distance for NGC 4051 is much smaller than in the observed kinematics. This result may indicate that either additional force(s) are responsible for accelerating the NLR outflows in low-luminosity AGNs, or higher spatial resolution observations are required to quantify their turnover radii.
Asteroseismology: Looking for Axions in the Red Supergiant Star Alpha Ori
Authors: Severino Clara , Lopes Ilídio 
Published: January 2023

Abstract
In this work, for the first time, we use seismic data as well as surface abundances to model the supergiant α-Ori, with the goal of setting an upper bound on the axion–photon coupling constant g

a
γ
. We find that, in general, stellar models with g

a
γ
∈ [0.002; 2.0] × 10−10 GeV−1 agree with the observational data, but beyond that upper limit, we do not find stellar models that are compatible with the observational constraints and the current literature. From g

a
γ
= 3.5 × 10−10 GeV−1 on, the algorithm did not find any fitting models. Even so, all the axionic models considered present distinct internal profiles from the reference case, without axions. Moreover, as the axion energy losses become more significant, the behavior of the stellar models becomes more diversified, even with very similar input parameters. Nonetheless, the consecutive increments of g

a
γ
still show systematic tendencies, resulting from the axion energy losses. Moreover, we establish three important conclusions: (1) the increased luminosity and higher neutrino production are measurable effects, possibly associated with axion energy losses; (2) stellar models with axion energy loss show a quite distinct internal structure; and (3) the importance of future asteroseismic missions in observing low-degree nonradial modes in massive stars is emphasized—as internal gravity waves probe the near-core regions, where axion effects are most intense. Thus, more seismic data will allow us to constrain g

a
γ
better and to prove or dismiss the existence of axion energy loss inside massive stars.
Simulation of Solar Wind Turbulence near Corotating Interaction Regions: Superposed Epoch Analysis of Simulations and Observations
Authors: Ghanbari Keyvan , Florinski Vladimir 
Published: January 2023

Abstract
The effect of the turbulence that is associated with solar wind corotating interaction regions (CIRs) on transport of galactic cosmic rays remains an outstanding problem in space science. Observations show that the intensities of the plasma and magnetic fluctuations are enhanced within a CIR. The velocity shear layer between the slow and fast wind embedded in a CIR is thought to be responsible for this enhancement in turbulent energy. We perform physics-based magnetohydrodynamic simulations of the plasma background and turbulent fluctuations in the solar wind dominated by CIRs for radial distances between 0.3 and 5 au. A simple but effective approach is used to incorporate the inner boundary conditions for the solar wind and magnetic field for the periods 2007–2008 and 2017–2018. Legendre coefficients at the source surface obtained from the Wilcox Solar Observatory library are utilized for dynamic reconstructions of the current sheet and the fast and slow streams at the inner boundary. The dynamic inner boundary enables our simulations to generate CIRs that are reasonably comparable with observations near Earth. While the magnetic field structure is reasonably well reproduced, the enhancements in the turbulent energy at the stream interfaces are smaller than observed. A superposed epoch analysis is performed over several CIRs from the simulation and compared to the superposed epoch analysis of the observed CIRs. The results for the turbulent energy and correlation length are used to estimate the diffusion tensor of galactic cosmic rays. The derived diffusion coefficients could be used for more realistic modeling of cosmic rays in a dynamically evolving inner heliosphere.
Multiple Populations in Low-mass Globular Clusters: Eridanus
Authors: Wang Yue , Tang Baitian , Li Chengyuan , Baumgardt Holger , Muñoz Ricardo R. , Fernández-Trincado José G. , Geisler Doug , Fang Yuanqing 
Published: January 2023

Abstract
Multiple populations (MPs), characterized by variations in light elemental abundances, have been found in stellar clusters in the Milky Way, Magellanic Clouds, as well as several other dwarf galaxies. Based on a large number of observations, mass has been suggested to be a key parameter affecting the presence and appearance of MPs in stellar clusters. To further investigate the existence of MPs in low-mass clusters and explore the mass threshold for the formation of MPs, we carried out a project studying the composition of the stellar population in several low-mass Galactic globular clusters. Here we present our study on the cluster Eridanus. With blue-UV low-resolution spectra obtained with the OSIRIS/Multi-object spectrograph on the Gran Telescopio Canarias, we computed the spectral indices of CH and CN for a sample of giant stars and derived their carbon and nitrogen abundances using model spectra. A significant dispersion in the initial surface abundance of nitrogen was found in the sample, indicating the existence of MPs in Eridanus. Inspecting the age–initial mass distribution of in situ clusters with MPs, we find a slight trend that initial mass increases with increasing age, and the lowest initial masses of

log

M

initial

∼ 4.98 and 5.26 are found at the young and old end, respectively, which might provide a rough reference for the mass threshold for clusters to form MPs. However, more observations of clusters with low initial masses are still necessary before any firm conclusion can be drawn.
The Equilibrium of Coronal Loops Near Separatrices
Authors: Mason Emily I , Antiochos Spiro K , Bradshaw Stephen 
Published: January 2023

Abstract
We present numerical models from the field-aligned HYDrodynamics and RADiation code (HYDRAD) of a highly asymmetric closed coronal loop with near-singular expansion factor. This loop was chosen to simulate a coronal magnetic flux tube that passes close to a null point, as in the last set of closed loops under the fan surface of a coronal jet or a pseudostreamer. The loop has a very large cross section localized near the coronal null. The coronal heating was assumed to be uniform and steady. A siphon flow establishes itself within 4 hr of simulation time, flowing from the smaller-area footpoint to the larger-area footpoint, with high initial speeds dropping rapidly as the plasma approaches the null region. Observationally, this would translate to strong upflows on the order of 10 km s−1 from the footpoint rooted in the localized minority polarity, and weak downflows from the fan-surface footpoint on the order of a few kilometers per second, along with near-stationary plasma near the null region. We present the model results for two heating rates. In addition, we analyzed analogous Hinode EUV Imaging Spectrometer observations of null-point topologies, which show associated Doppler shifts in the plasma that correlate well with the simulation results in both direction and magnitude of the bulk velocity. We discuss the implications of our results for determining observationally the topology of the coronal magnetic field.
Quelle recomposition des services financiers dans l'UE27 après le Brexit ?
Authors: Beau Denis 
Published: January 2023

Le Brexit a non seulement constitué un bouleversement politique majeur, mais est également à l'origine de transformations profondes pour les services financiers, compte tenu tant de l'importance de ces services dans le bon fonctionnement des économies européennes et britanniques que de leurs liens. Par ailleurs, pour l'Union européenne, le Brexit constitue assurément une opportunité sans précédent d'asseoir son autonomie en matière de financement, de renforcer sa robustesse en développant un système financier polycentrique appuyé sur des infrastructures de marché européennes et de s'inscrire comme leader en matière d'innovation. Cela n'implique pas cependant de relâcher les liens et le dialogue avec le Royaume-Uni : le maintien d'une forte coordination avec les autorités britanniques, particulièrement sur les champs de la réglementation afférents à des risques systémiques ou globaux, demeure éminemment souhaitable pour éviter d'alimenter un risque de fragmentation réglementaire qui serait dommageable. Classification JEL : F36, F38, F65, G18.
Les liens entre les marchés financiers de l'UE et du Royaume-Uni ont-ils résisté au Brexit ?
Authors: Mitra Srobona , Pradhan Mahmood 
Published: January 2023

Six ans après le référendum du Royaume-Uni, la question du Brexit n'a pas encore été résolue. Alors que l'attention se concentre principalement sur le désaccord sur les règles du commerce via l'Irlande du Nord, la résilience des flux financiers transfrontaliers entre l'Union européenne (UE) et le Royaume-Uni ne suggère aucune fracture significative dans les liens qui lient de longue date les marchés financiers de l'UE et du Royaume-Uni. Les deux parties ont été pragmatiques, permettant une transition plus douce, en se prémunissant contre les risques bien connus pour la stabilité financière d'une séparation brutale. L'initiative de l'Union des marchés des capitaux, bien que bien avancée, est loin d'offrir aux entités de l'UE un marché commun des capitaux intra-UE, ainsi que la liquidité du marché et les avantages des réseaux offerts actuellement par Londres. La réalisation de cette Union des marchés des capitaux égalisera les coûts de financement pour les entreprises et les ménages, mais requerra l'élimination des barrières aux flux transfrontaliers de capitaux financiers et bancaires dans l'UE. La préservation des liens entre le Royaume-Uni et l'UE profitera donc aux deux parties, créant un pont en direction de la longue transition vers des marchés de capitaux plus intégrés au sein de l'UE. Classification JEL : F36, F38, F65, G18.
Ethics and Technique in Welfare Economics: How Welfarism Evolves in the Making
Authors: Baujard Antoinette 
Published: January 2023

Dans le cadre d’étude welfariste, des affirmations telles que « cet état social est meilleur que tel autre état social » ou « cette politique devrait être promulguée » reposent sur l’hypothèse que le bien-être social ne dépend que du bien-être des individus et de rien d’autre. Une analyse normative du welfarisme vise à fournir une description transparente des jugements de valeur impliqués dans ces évaluations et ces recommandations, ce qui revient à s’interroger en particulier sur la notion du bien-être qui a été retenue. Cette enquête normative peut prendre deux formes et cet article défend l’idée qu’il convient de les distinguer : l’analyse éthique du welfarisme concerne le recours à une théorie éthique donnée du bien-être ; et l’analyse technique du welfarisme concerne la mesure de l’utilité individuelle qui est utilisée en pratique pour mesurer ce bien-être social. L’article passe en revue successivement quatre points de vue types portant sur l’articulation de ces deux versions du welfarisme : le point de vue standard, de l’approximation, de la preuve et de la tension. En étudiant l’interprétation normative des affirmations welfaristes, il explore les différences qui émergent entre les approches éthique et technique. JEL Codes: B4, D6, I31.
Assessment of psychological distress pattern & its correlates among people receiving COVID-19 vaccination during the COVID-19 pandemic
Authors: Singh Swarndeep , Parija Pragyan Paramita , Verma Rohit , Kumar Parmeshwar , Chadda Rakesh Kumar 
Published: January 2023

Background & objectives:
There is a possibility that vaccinated people may experience lesser psychological distress due to the sense of safety felt by them against getting the COVID-19 infection as compared to those who are not vaccinated. However, there is a paucity of research examining the mental health status of this important sub-group of population. Thus, the present study was aimed to examine the pattern of psychological distress and its correlates among people receiving COVID-19 vaccine.

Methods:
This cross-sectional study assessed individuals receiving COVID-19 vaccine at a tertiary care hospital. Psychological distress and COVID-19-related anxiety were assessed using the Depression Anxiety Stress Scale (DASS-21) and the COVID-19 Anxiety Scale-7, respectively.

Results:
The study comprised 728 individuals with a mean age of 44.8 yr. Moderate levels of depression, anxiety and stress were reported by about 50, six and 15 per cent of the participants, respectively, as assessed on DASS-21. Generalized linear model and quantile regression analyses revealed COVID-19-related anxiety, and being a healthcare worker or front-line worker as significant correlates of psychological distress.

Interpretation & conclusions:
About half of the study participants receiving COVID-19 vaccine reported moderate to severe symptoms of depression. Strategies focusing on alleviation of COVID-19-related fear and anxiety might be effective in improving the symptoms of psychological distress.
Using theory of reasoned action to reduce high-risk sexual behaviors among patients with HPV: A randomized controlled trial
Authors: Pourgholamamiji Nima , Shahsavari Hooman , Manookian Arpi , Soori Tahereh , Zandkarimkhani Maryam , Zare Zahra 
Published: January 2023

BACKGROUND:
Sexually transmitted diseases are a major health problem in all countries. Human papillomavirus (HPV) infection is the most common viral sexually transmitted disease in both genders. High-risk sexual behaviors (HRSBs) are among the major risk factors for HPV infection. Lack of knowledge can contribute to HRSBs and hence, education can potentially reduce HRSB risk. This is a study using theory of reasoned action to reduce the high-risk sexual behaviors among patients with HPV.

MATERIALS AND METHODS:
This study was a two-grouped, randomized, controlled trial. The educational program was developed based on the results of a survey into the most important components of the theory of reasoned action contributing to HRSBs among 100 patients recruited from Razi hospital, Tehran, Iran. Then, 110 patients from the same hospital were consecutively recruited and randomly allocated to a control (n = 55) and an intervention (n = 55) group. Then, each participant in the intervention group was provided with the developed educational program. Their counterparts in the control group solely received routine care services. Three months after the first educational session, HRSBs were reassessed in both groups. Data were analyzed via the SPSS software (v. 21.0).

RESULTS:
After the intervention, the mean score of HRSBs significantly decreased in the intervention group (P < 0.001) but did not significantly change in the control group (P = 0.70). The post-test mean score of HRSBs in the intervention group was significantly less than the control group (P = 0.015).

CONCLUSION:
Education based on the theory of reasoned action is effective in significantly reducing HRSBs. Nurses can develop and use educational interventions based on this theory to reduce HRSBs and HPV infection.