bluuebunny/crossref_metadata_2025_split huggingface dataset:
KMT-2023-BLG-1866Lb: Microlensing super-Earth around an M dwarf host
Authors: Han Cheongho , Bond Ian A. , Udalski Andrzej , Lee Chung-Uk , Gould Andrew , Albrow Michael D. , Chung Sun-Ju , Hwang Kyu-Ha , Jung Youn Kil , Ryu Yoon-Hyun , Shvartzvald Yossi , Shin In-Gu , Yee Jennifer C. , Yang Hongjing , Zang Weicheng , Cha Sang-Mok , Kim Doeon , Kim Dong-Jin , Kim Seung-Lee , Lee Dong-Joo , Lee Yongseok , Park Byeong-Gon , Pogge Richard W. , Abe Fumio , Bando Ken , Barry Richard , Bennett David P. , Bhattacharya Aparna , Fujii Hirosame , Fukui Akihiko , Hamada Ryusei , Hamada Shunya , Hamasaki Naoto , Hirao Yuki , Ishitani Silva Stela , Itow Yoshitaka , Kirikawa Rintaro , Koshimoto Naoki , Matsubara Yutaka , Miyazaki Shota , Muraki Yasushi , Nagai Tutumi , Nunota Kansuke , Olmschenk Greg , Ranc Clément , Rattenbury Nicholas J. , Satoh Yuki , Sumi Takahiro , Suzuki Daisuke , Tomoyoshi Mio , Tristram Paul J. , Vandorou Aikaterini , Yama Hibiki , Yamashita Kansuke , Mróz Przemek , Szymański Michał K. , Skowron Jan , Poleski Radosław , Soszyński Igor , Pietrukowicz Paweł , Kozłowski Szymon , Rybicki Krzysztof A. , Iwanek Patryk , Ulaczyk Krzysztof , Wrona Marcin , Gromadzki Mariusz , Mróz Mateusz J. 
Published: June 2024

Aims. We aim to investigate the nature of the short-term anomaly that appears in the lensing light curve of KMT-2023-BLG-1866. The anomaly was only partly covered due to its short duration of less than a day, coupled with cloudy weather conditions and a restricted nighttime duration.
Methods. Considering the intricacy of interpreting partially covered signals, we thoroughly explored all potential degenerate solutions. Through this process, we identified three planetary scenarios that account for the observed anomaly equally well. These scenarios are characterized by the specific planetary parameters: (s, q)inner = [0.9740 ± 0.0083, (2.46 ± 1.07) × 10−5], (s, q)intermediate = [0.9779 ± 0.0017, (1.56 ± 0.25) × 10−5], and (s, q)outer = [0.9894 ± 0.0107, (2.31 ± 1.29) × 10−5], where s and q denote the projected separation (scaled to the Einstein radius) and mass ratio between the planet and its host, respectively. We identify that the ambiguity between the inner and outer solutions stems from the inner-outer degeneracy, while the similarity between the intermediate solution and the others is due to an accidental degeneracy caused by incomplete anomaly coverage.
Results. Through Bayesian analysis utilizing the constraints derived from measured lensing observables and blending flux, our estimation indicates that the lens system comprises a very-low-mass planet orbiting an early M-type star situated approximately (6.2–6.5) kpc from Earth in terms of median posterior values for the different solutions. The median mass of the planet host is in the range of (0.48–0.51) M⊙, and that of the planet’s mass spans a range of (2.6–4.0) ME, varying across different solutions. The detection of KMT-2023-BLG-1866Lb signifies the extension of the lensing surveys to very-low-mass planets that have been difficult to detect in earlier surveys.
Four microlensing giant planets detected through signals produced by minor-image perturbations
Authors: Han Cheongho , Bond Ian A. , Lee Chung-Uk , Gould Andrew , Albrow Michael D. , Chung Sun-Ju , Hwang Kyu-Ha , Jung Youn Kil , Ryu Yoon-Hyun , Shvartzvald Yossi , Shin In-Gu , Yee Jennifer C. , Yang Hongjing , Zang Weicheng , Cha Sang-Mok , Kim Doeon , Kim Dong-Jin , Kim Seung-Lee , Lee Dong-Joo , Lee Yongseok , Park Byeong-Gon , Pogge Richard W. , Abe Fumio , Bando Ken , Barry Richard , Bennett David P. , Bhattacharya Aparna , Fujii Hirosame , Fukui Akihiko , Hamada Ryusei , Hamada Shunya , Hamasaki Naoto , Hirao Yuki , Ishitani Silva Stela , Itow Yoshitaka , Kirikawa Rintaro , Koshimoto Naoki , Matsubara Yutaka , Miyazaki Shota , Muraki Yasushi , Nagai Tutumi , Nunota Kansuke , Olmschenk Greg , Ranc Clément , Rattenbury Nicholas J. , Satoh Yuki , Sumi Takahiro , Suzuki Daisuke , Tomoyoshi Mio , Tristram Paul J. , Vandorou Aikaterini , Yama Hibiki , Yamashita Kansuke , Bachelet Etienne , Rota Paolo , Bozza Valerio , Zielinski Paweł , Street Rachel A. , Tsapras Yiannis , Hundertmark Markus , Wambsganss Joachim , Wyrzykowski Łukasz , Figuera Jaimes Roberto , Cassan Arnaud , Dominik Martin , Rybicki Krzysztof A. , Rabus Markus 
Published: June 2024

Aims. We investigated the nature of the anomalies appearing in four microlensing events KMT-2020-BLG-0757, KMT-2022-BLG-0732, KMT-2022-BLG-1787, and KMT-2022-BLG-1852. The light curves of these events commonly exhibit initial bumps followed by subsequent troughs that extend across a substantial portion of the light curves.
Methods. We performed thorough modeling of the anomalies to elucidate their characteristics. Despite their prolonged durations, which differ from the usual brief anomalies observed in typical planetary events, our analysis revealed that each anomaly in these events originated from a planetary companion located within the Einstein ring of the primary star. It was found that the initial bump arouse when the source star crossed one of the planetary caustics, while the subsequent trough feature occurred as the source traversed the region of minor image perturbations lying between the pair of planetary caustics.
Results. The estimated masses of the host and planet, their mass ratios, and the distance to the discovered planetary systems are (Mhost/M⊙, Mplanet/MJ, q/10−3, DL/kpc) = (0.58−0.30+0.33, 10.71−5.61+6.17, 17.61 ± 2.25, 6.67−1.30+0.93) for KMT-2020-BLG-0757, (0.53−0.31+0.31, 1.12−0.65+0.65, 2.01 ± 0.07, 6.66−1.84+1.19) for KMT-2022-BLG-0732, (0.42−0.23+0.32, 6.64−3.64+4.98, 15.07 ± 0.86, 7.55−1.30+0.89) for KMT-2022-BLG-1787, and (0.32−0.19+0.34, 4.98−2.94+5.42, 8.74 ± 0.49, 6.27−1.15+0.90) for KMT-2022-BLG-1852. These parameters indicate that all the planets are giants with masses exceeding the mass of Jupiter in our solar system and the hosts are low-mass stars with masses substantially less massive than the Sun.
FDI and human capital development: a tale of two Southeast Asian economies
Authors: Ibarra-Olivo J. Eduardo , Neise Thomas , Breul Moritz , Wrana Jöran 
Published: June 2024

AbstractMiddle-income economies must prioritise human capital development to ensure long-term sustainable growth and economic upgrading. While foreign direct investment (FDI) is believed to aid this endeavour, its impact on technical vocational education and training (TVET) remains understudied. This research explores the influence of FDI by multinational enterprises (MNEs) at various stages of global value chains (GVCs) on TVET graduate numbers in Vietnam and Indonesia from 2006 to 2016. Our findings reveal that greenfield FDI plays a role in shaping TVET supply, with heterogeneous effects across different GVC segments and subnational regions. Specifically, FDI in logistics, sales and marketing, and support and servicing are associated with an increase in the supply of TVET graduates in the region, whereas FDI in headquarters and production may lead to a decline in technical skills. To address these dynamics, public policies should prioritise flexible education systems capable of adapting to MNEs’ evolving skill demands. By doing so, these economies can elevate local human capital levels and avoid the stagnation often associated with middle-income traps. This research underscores the importance of aligning policy with the needs of a rapidly changing global economy to foster sustainable development.
Solvent effect in H-BEA catalyzed cyclohexanol dehydration reaction
Authors: Li Sha , Chen Huimin 
Published: June 2024

The solvent effect on H-BEA catalyzed cyclohexanol dehydration was investigated in water, dioxane, and cyclohexanol. The dynamic evolution of the Brønsted acid site of zeolite and its interaction with reactant molecules in different solvents were explored with ab initio molecular dynamics simulations, providing reliable configuration sampling to obtain configurations at equilibrium. Solvent profoundly changes the adsorption as well as the dehydration reaction of cyclohexanol in H-BEA, where the reaction is determined to follow the E2 mechanism in water and dioxane but the E1 mechanism in cyclohexanol untill saturation uptake. Near saturation uptake, all three solvents significantly reduce the cyclohexanol dehydration rates in H-BEA. Cyclohexanol loading also dramatically affects the kinetics of the dehydration reaction, displaying an overall decreasing trend with a local minimum present at intermediate loading of 6 molecules per unit cell, which is a result of the entropic effect associated with greater freedom of motion of the transition state. Rigorous quantification of enthalpy and entropy contributions to cyclohexanol adsorption and activation shed light on the solvent effect of zeolite-catalyzed alcohol dehydration.
汉语句子的基本单位刍议
Authors: Li Jinman 
Published: June 2024

抽象的
汉语中“词”的界定一直是个棘手的话题。本文从广受国内外学者关注的汉语关系从句的加工单位说起，综合多源证据，探讨汉语句子的基本分析单位是否是“词”的问题。文章首先基于前期汉语关系从句自定速阅读加工研究中的相关实验刺激材料，对比分析同一实验、同一研究、同类研究之间采用的加工单位情况；然后综合来自眼动实验、容错现象、自然语言处理、汉英构词对比等多个研究领域中的证据，进一步审视汉语句子基本单位的问题。最后，我们从语言学视角，梳理国内外学者对汉语中“字”、“词”看法的演变，认为可以将汉语句子单位纳入类型学视野下进行考量，探索更合理普适的解决方案，促进语言相关领域的研究。
The relationship between teachers’ pedagogical practices in CLIL and the development of students’ foreign language oral proficiency
Authors: Sato Takanori 
Published: June 2024

Abstract
This study investigated the relationship between foreign language (FL) oral proficiency development and teachers’ pedagogical practices in content and language integrated learning (CLIL). A one-group pretest-posttest design was employed to analyze changes in Japanese university students’ FL proficiency over time, alongside classroom observations and interviews that captured their teachers’ classroom pedagogies in CLIL courses. The results generally indicated that students improved their capacity to achieve communicative goals but failed to exhibit progress in oral linguistic competence. The former outcome was attributed to predominantly meaning-focused instruction, the use of dialogic pedagogy, and ample opportunities to practice FL speaking. In contrast, the absence of explicit language instruction and limited practice of fluency development tasks was perceived to lead to the latter outcome. These findings not only contribute to understanding the effects of CLIL on FL learning, but also shed light on the specific pedagogy-related factors that contribute to FL proficiency development.
Influence of light source modulation on detection performance of trace-level SF6 fault gas using photoacoustic spectroscopy
Authors: Zhu Kexin , Zeng Fuping , Huang Zujian , Jiang Xinghai , Chao Xianzong , Feng Xiaoxuan , Tang Ju 
Published: June 2024

Abstract
Photoacoustic spectroscopy (PAS) is highly valued in gas detection for its outstanding sensitivity and rapid response. Addressing its limited precision in trace gas analysis, scholars have taken numerous measures to optimize structural and modify the size of acoustic sensors and photoacoustic cells (PACs). Nevertheless, advancements in laser modulation remain understudied due to technical difficulties. This paper theoretically examines the effects of intensity modulation with square wave signals and wavelength modulation involving sawtooth and sinusoidal. In this paper, a theoretical approach is proposed to examine the effects of intensity modulation with square wave signals and wavelength modulation involving sawtooth and sinusoidal signals. Experimental measurements were performed using parameters obtained in preliminary experiments. We constructed an experimental setup with varied-length PACs to bolster experimental dependability, focusing on H2S as the target gas to compare the two laser modulation techniques. The results exhibited that at low frequencies, intensity modulation outperforms wavelength modulation. At resonance frequencies, however, wavelength modulation could provide stronger signals’ intensity. Modulation frequency considerations are therefore crucial when choosing a modulation method for PAS gas detection. Without specific frequency requirements, a second harmonic modulation at resonance is recommended. This study provides guidance on selecting laser modulation methods for PAS, potentially refining the technique’s application in trace gas analysis.
Self-doped flat band and spin-triplet superconductivity in monolayer 1T-TaSe2−x
Te
x
Authors: Phillips Jan , Lado Jose L , Pardo Víctor , Fumega Adolfo O 
Published: June 2024

Abstract
Two-dimensional van der Waals materials have become an established platform to engineer flat bands which can lead to strongly-correlated emergent phenomena. In particular, the family of Ta dichalcogenides in the 1T phase presents a star-of-David charge density wave that creates a flat band at the Fermi level. For TaS2 and TaSe2 this flat band is at half filling leading to a magnetic insulating phase. In this work, we theoretically demonstrate that ligand substitution in the TaSe

2
−
x

Te
x
system produces a transition from the magnetic insulator to a non-magnetic metal in which the flat band gets doped away from half-filling. For

x
∈
[

0.846

,

1.231

]

the spin-polarized flat band is self-doped and the system becomes a magnetic metal. In this regime, we show that attractive interactions promote three different spin-triplet superconducting phases as a function of x, corresponding to a nodal f-wave and two topologically-different chiral p-wave superconducting phases. Our results establish monolayer TaSe

2
−
x

Te
x
as a promising platform for correlated flat band physics leading to unconventional superconducting states.
Research on acoustic localization method for multiple leakage sources of water-cooling wall in furnace
Authors: Kong Qian , Yang Jiajia , Liu Yuechao , Jiang Genshan , Li Peng 
Published: June 2024

Abstract
The water-cooling wall of a furnace often leaks under harsh conditions, such as high temperature and pressure, which affects the safe and economic operation of the boiler. To achieve the localization of multiple leakage sources in a water-cooling wall, an acoustic positioning method based on improved differential evolution and density-based spatial clustering of application with noise (IDE-DBSCAN) is proposed. The nonlinear equation system is constructed using the time delay of arrival (TDOA) obtained by the generalized second cross-correlation algorithm, and the IDE algorithm is used to solve the nonlinear equation system and obtain multiple spatial positions corresponding to multiple TDOA sequences. To eliminate false leakage sources, IDE-DBSCAN is presented to cluster multiple estimated positions. The number of clusters obtained is the number of leakage sources, and the cluster centers are the location coordinates of the leakage sources. The numerical simulation results show that, compared to traditional acoustic positioning methods, IDE-DBSCAN has a higher positioning accuracy and better anti-noise ability. In addition, experiments are conducted on multiple leakage sound sources within a measurement area of 1 m × 1 m × 1.06 m, and the positioning errors remain within 5 cm. The proposed method provides a theoretical basis and experimental verification for further research on the localization of multiple leakages of water-cooling wall in furnace.
H/O edge passivated B/N co-doped armchair graphene nanoribbon field-effect transistors, based on first principles
Authors: Deng Jingui , Miao Rui , Deng Yayu , Zhou Guangfeng , Wang Lei , Liang Yujian , Zhang Jian , Chen Qian , Shao Qingyi , Shao Cairu 
Published: June 2024

Abstract
This study employs the nonequilibrium Green’s function method in conjunction with density functional theory to fabricate and analyze a Graphene Nanoribbon Field-Effect Transistor (GNRFET). The co-doping of B and N creates built-in electric fields, thereby reducing leakage current. The results demonstrate effective control performance of planar gates, as evidenced by an increase in IDS
with rising gate voltage. Furthermore, a negative differential conductance phenomenon is observed at bias voltages exceeding 0.7 V, exhibiting correlation with transmission spectra and energy band structures. To precisely illustrate the electron distribution within the doped scattering region, calculations involving transport paths, the molecular projection self-consistent Hamiltonian (MPSH), and the emission eigenvalues and eigenstates of the device are conducted. This research provides a reference for exploring and developing smaller and more energy-efficient AGNR field effect transistor designs and implementations. The principal objective of this paper is to investigate the potential applications of these smaller, more energy-efficient devices.
Predefined-time stabilization of Lorenz system with applications for stabilizing and synchronizing chaotic finance systems
Authors: Wu Jie , Gu Yanting , Ji Zhufangyuan , Wu Kexing , Ma Ru-Ru 
Published: June 2024

AbstractThis article investigates the predefined-time stabilization (PtS) of the canonical Lorenz system at first, and then applies the derived results into the chaotic finance systems (CFSs) so as to realize the stabilization and synchronization, respectively. Compared with the traditional finite-/fixed-time stability analysis, the upper-bound of convergence time (UbCT) in this investigation can be set beforehand in need, which is an explicit constant regardless of initial values, system dimension, and controlling parameters. Moreover, the designed control schemes are non-chattering, which do not contain the conventional discontinuous signum and absolute value functions anymore. Via adopting the second Lyapunov method, the sufficient conditions are obtained successively for guaranteeing the realization of PtS for Lorenz system, CFS, as well as the predefined-time synchronization between two CFSs. The numerical experiments are finally arranged to manifest the correctness and effectiveness of the theoretical fruits, in which some comparison and perturbation analysis are made.
Euler-Maruyama approximation for stochastic fractional neutral integro-differential equations with weakly singular kernel
Authors: Asadzade Javad A , Mahmudov Nazim I 
Published: June 2024

Abstract
This manuscript examines the problem of nonlinear stochastic fractional neutral integro-differential equations with weakly singular kernels. Our focus is on obtaining precise estimates to cover all possible cases of Abel-type singular kernels. Initially, we establish the existence, uniqueness, and continuous dependence on the initial value of the true solution, assuming a local Lipschitz condition and linear growth condition. Additionally, we develop the Euler-Maruyama method for numerical solution of the equation and prove its strong convergence under the same conditions as the well-posedness. Moreover, we determine the accurate convergence rate of this method under global Lipschitz conditions and linear growth conditions.
Exploring the nonlinear optical characteristics of supersalt-decorated graphyne via DFT analysis: unveiling quantum insights into light-matter interaction
Authors: Ayub Ali Raza , Zeshan Muhammad , Salba  , Tahir Sheza , Hussain Talib , Ali Qasim , Iqbal Javed 
Published: June 2024

Abstract
In this comprehensive study, we explore into the nonlinear optical (NLO) properties of graphyne (GRY) and its compounds decorated with a super salt (OLi3BeF3), namely GRY@SS1, and GRY@SS2) using the

rB
3
LYP
/
6
−
31
G
(
d
,
p
)

DFT method. Our findings reveal a substantial enhancement in the electron transfer properties of decorated compounds compared to the pristine GRY surface. This enhancement is evidence by the reduction in the bandgap energies

(

E

g

)

from 3.52 eV to 1.68 eV and remarkable boost in maximum absorption (

λ

max

)

from 372.66 to 807.73 nm. Noteably, GRY@SS2 exhibits a significant increase in linear polarizability (

α

0

) (538.18 au), first hyperpolarizability (

β

0

) (3872.76 au), and second hyperpolarizability (

γ

0

) (1.00 × 106) due to reduced excitations energies compared to the GRY (

α

0

= 448.61,

β

0

= 0.14 and

γ

0

= 5.97 × 105 au). NBO charges show that electrons are transferring from the dopant (supersalt) to the GRY sheet. Furthermore, Non-covalent interactions (NCl), iso-surface, infrared (IR), 1H NMR, and 13C NMR studies have been conducted to provide insights into the nature of interactions, vibrational frequencies, and structural-functional aspects of GRY and GRY@SS1, and GRY@SS2. According to TD-DFT calculations, all compounds demonstrate superior vertical ionization potential, UV–vis absorbance, HOMO–LUMO characteristics, as well as interaction energies. Our results underscore the potential of these compounds as valuable NLO materials, particularly highlighting the promising prospects of GRY@SS2.
Computational study of the structural, electronic, optical, and thermoelectric properties of (Ag, B, I) doped Cs2PdBr6 compound
Authors: Boubekraoui Amina , Ziati Meryem , Ez-Zahraouy Hamid 
Published: June 2024

Abstract
This investigation explores the properties of pure lead-free Cesium Hexabromopalladate (IV), Cs2PdBr6, and Cs2PdBr6-xYx (Y = Ag, B, I) (x = 0.2496) compounds using the Density Functional Theory (DFT) method. The study examines the compounds’ structural, electronic, optical, and thermoelectric attributes, establishing their negative formation energies and relative stability, indicating their potential for synthesis. The research reveals a decrease in indirect band gap with the incorporation of Iodine, Boron, and Silver dopants. Additionally, the optical properties, including the absorption coefficient and optical band gap, demonstrate pronounced absorbance and efficacy in the visible region. The transport properties are modelled, with the Seebeck coefficient indicating a transition from p-type to n-type conductive demeanor for B and Ag-doped Cs2PdBr6. The study concludes that pure Cs2PdBr6 and B, Ag, I-doped Cs2PdBr6 are superlative contenders for optoelectronic and solar cell applications. Overall, this research proffers valuable insights into the prospective applications of these compounds and their attributes.
Robust brain tumor detection and classification via multi-technique image analysis
Authors: N Salma , G R Madhuri , Jagadale Basavaraj , G M Akshata 
Published: June 2024

Abstract
Accurate detection and classification of brain tumors play a critical role in neurological diagnosis and treatment.Proposed work developed a sophisticated technique to precisely identify and classify brain neoplasms in medical imaging. Our approach integrates various techniques, including Otsu’s thresholding, anisotropic diffusion, modified 3-category Fuzzy C-Means (FCM) for segmentation after skull stripping and wavelet transformation for post-processing for segmentation, and Convolution neural networks for classification. This approach not only recognizes that discriminating healthy brain tissue from tumor-affected areas is challenging, yet it also focuses on finding abnormalities inside brain tumors and early detection of tiny tumor structures. Initial preprocessing stages improve the visibility of images and the identification of various regions while accurately classifying tumor locations into core, edema, and enhancing regions by segmentation as well. Ultimately, these segmented zones are refined using wavelet transforms, which remove noise and improve feature extraction. Our CNN architecture uses learned abstractions to distinguish between healthy and malignant regions, ensuring robust classification. It is particularly good at identifying tiny tumors and detecting anomalies inside tumor regions, which provides substantial advances in accurate tumor detection. Comprehensive hypothetical evaluations validate its efficacy, which could improve clinical diagnostics and perhaps influence brain tumor research and treatment approaches.