bluuebunny/crossref_metadata_2025_split huggingface dataset:
Language varieties and labor mobilities
Authors: Borlongan Ariane Macalinga , Vilog Ron Bridget 
Published: June 2024

Abstract
While language is clearly an important aspect of (labor) migration, there have not been many contemplations and
interrogations, although truly compelling and necessary, on language varieties and their place and position in labor migration and
transnational work in the contemporary world, and hence why we intend to do so in this article. In our paradigmatic analysis of
language varieties in the context of labor mobilities, we shall take the case of the varieties of English arising from the global
spread of the language worldwide as our focal point. The world Englishes paradigm thus greatly informs and substantiates our
discussion so we shall first give the principles of this paradigm shift in linguistics begun by Braj Kachru. We subsequently
connect world Englishes theorizing to labor migration practices. We shall argue that language is not only integral to the work
being done by migrants, but is actually the work in itself. A consequence of this is that there are language varieties and
Englishes which fit the work to be done more than others, and, therefore, these varieties and Englishes are becoming commodified
as well in labor migration. We shall also take a look at the structural ramifications of labor migration on Englishes, how these
new varieties are restructured further as they move from one place to another along with labor migrants. As it will become
apparent, our discussion covers the situation of labor migrants in precarity more than the hyper-mobile elites often privileged in
migratory contexts. Ultimately, we shall synthesize issues relating to language varieties in the context of transnational work and
propose strategies in dealing not only with multilingual but also language-varietal diversity in (labor) migrations and
mobilities.
Marking the sources of knowledge, asserting the epistemic stance
Authors: Meier Franz 
Published: June 2024

Abstract
At the beginning of the 20th century, the Jesuit priest Joseph Deharveng (1867–1929) was one of the main
representatives of a language correction movement based essentially on the standard Parisian model of French. Deharveng’s goal was
to clear the practices of French-speaking Belgians of everything which seemed to deviate from this supposed ‘good usage’ of
French. Under the evocative title Corrigeons-nous!, Deharveng published six anthologies from 1922 to 1928
reproducing the articles published in his language column “Récréation philologique et grammaticale” in the Brussels newspaper
La Jeunesse. The present study addresses how Deharveng makes use of evidential markers, that is, linguistic
features to express the sources of knowledge in his language column. The distribution of evidential markers in Deharveng’s column
is compared to those in two other Franco-Belgian language columns published by Albert Doppagne (1912–2003) from 1960 to 1987 in
the Brussels newspaper Le Soir and by Michel Francard (1952–) from 2018 to 2022, also in Le
Soir. The aim of this comparison is to discern author-specific and language ideology-driven similarities and differences
in the patterning of evidential strategies in language columns.
What frequencies tell us of the foodstuffs used as source domain to conceptualize attractive people in Peninsular
Spanish
Authors: García-Romero Margarita 
Published: June 2024

Abstract
This paper offers a study of the foodstuffs used by speakers of Peninsular Spanish when referring to an attractive
individual. Two online forums were scanned to automatically search for linguistic realizations of the metaphor an attractive
individual is appetizing food. A corpus of 860 short texts was compiled, which contains the food terms used in context.
The frequency distribution of the type of food and the variable of gender was measured. Results indicate a preference to exploit
the metaphor through salty food products and that the foodstuffs used are highly dependent on the variable of gender. Contrary to
previous studies (e.g., Caitlin Hines 2000; Irene
López Rodríguez 2007, 2008), the frequency of sweets and desserts is not
higher with female referents. The findings do not agree with prior assumptions about the foodstuffs used in Peninsular Spanish to
conceptualize attractive people and the cultural stereotypes associated with them.
Measurements of the first-flux-penetration field in surface-treated and coated Nb: distinguishing between near-surface pinning and an interface energy barrier
Authors: Asaduzzaman Md , McFadden Ryan M L , Thoeng Edward , Laxdal Robert E , Junginger Tobias 
Published: June 2024

Abstract
We report measurements of the first-flux-penetration field in surface-treated and coated Nb samples using

(
μ
SR
)

. Using thin Ag foils as energy moderators for the implanted muon spin-probes, we ‘profile’ the vortex penetration field

μ

0

H

vp

at sub-surface depths on the order of

∼

10

μ

m to

∼

100

μ

m. In a coated sample [Nb3Sn(

2

μ
m

)/Nb], we find that

μ

0

H

vp

is depth-independent with a value of 234.5(35) mT, consistent with Nb’s metastable superheating field and suggestive of surface energy barrier for flux penetration. Conversely, in a surface-treated sample [Nb baked in vacuum at 120 ∘

C

for

48

h

], vortex penetration onsets close to pure Nb’s lower critical field

μ

0

H

c
1

≈

170

mT

, but increases with increasing implantation depth, consistent with flux-pinning localized at the surface. The implication of these results for technical applications of superconducting Nb, such as superconducting radio frequency cavities, is discussed.
The dependence of operating frequency of NbN Toggle Flip-flop on parameters of NbN Josephson junctions
Authors: Shao Yingyi , Wang Huiwu , Niu Minghui , Peng Wei , Ren Jie , Wang Zhen 
Published: June 2024

Abstract
We performed a comprehensive investigation of the relationship between the maximum operating frequency of the NbN superconducting frequency divider and the key parameters of the NbN Josephson junction (JJ). We designed a superconducting frequency divider that uses a single NbN JJ as a pulse generator, several NbN Josephson transmission lines, an NbN Toggle Flip-flop, and a load. By comparing the bias voltage V
in of the pulse generator with the output voltage V
out of the load, we determined if the circuit was working correctly and calculated the maximum operating frequency f
max. Additionally, we employed JSICsim software for simulations to analyze the impact of key parameters of the NbN JJ, such as critical current density J
c, gap voltage V
g, characteristic voltage V
c, quality factor Q, and specific capacitance C
s, on f
max. The simulation results demonstrate that f
max increases with increasing J
c and Q. Specifically when J
c exceeds 300 kA cm−2 and Q surpasses 4, the superconducting frequency divider can achieve a f
max of 1 THz. Furthermore, we successfully fabricated a superconducting frequency divider using a 10 kA cm−2 process and tested a f
max of 260 GHz, with a deviation of approximately 6% from the simulation results.
26.86-tesla direct-current magnetic field generated with an all-REBCO superconducting magnet
Authors: Zhang Xintao , Hu Shuai , Guo Liang , Hong Wenzhe , Wang Zhaoran , Ma Hongjun , Zhang Shuqing , Qin Jinggang , Zhou Chao , Gao Peng , Jin Huan , Shao Liangjun , Qu Timing , Hong Zhiyong , Liu Fang , Liu Huajun , Song Yuntao , Li Jiangang 
Published: June 2024

Abstract
This paper reports an all REBCO (REBa2Cu3Ox, where RE = Y, Gd) superconducting magnet that generated a direct-current magnetic field of 26.86 T at 4.2 K in self-field, which is the highest magnetic field achieved by the high temperature superconducting (HTS) magnet. The magnet consists of a stack of 10 double pancake (DP) coils wound with two different width REBCO conductors, and the no-insulation (NI) winding technology was applied to increase its engineering current density. The inner and outer winding diameters and overall height of the magnet are 30 mm, 103.98 mm, and 102.6 mm, respectively. In order to control the stress risk in HTS magnet, the over-banding made of high elastic modulus stainless steel tapes was employed to the magnet. In addition, no obvious degradation was found in the performance of the magnet after quench at 26.86 T of 295.5 A. These test results demonstrate the great potential of REBCO magnets in high field applications.
Impact of post deposition treatment on optoelectrical and microstructural properties of tin sulfide thin film for photovoltaic applications
Authors: Nisha  , Sarkar Prosenjit , Kumar Pawan , Katiyar Ram S 
Published: June 2024

Abstract
Tin sulfide (SnS) has attracted significant interest due to its advantageous optoelectrical characteristics and abundant presence in nature. Post-deposition treatments (PDTs) are frequently employed to enhance the crystallinity of chalcogenide-based solar cells. This study examined the influence of the post-deposition heat treatment procedure on thermally evaporated SnS thin film. The post-deposition annealing process, as determined by XRD and AFM studies, supplies the necessary thermal energy for re-crystallization, potentially resulting in a modification of crystallite dimensions. The occurrence of Sn-S polytypes was examined using Raman and XPS studies. Annealing causes changes in the optical properties, as observed through optical analysis, which can be attributed to the improvement in crystallinity. Subjecting the material to annealing at temperature of 300 °C greatly improves both mobility and conductivity, while also causing a change in conduction type. The observed variations in conduction type are attributed to the differing ratios between the amounts of Sn2+ and Sn4+. This strategy offers a novel route for the fabrication of thin-film photovoltaic cells by using a p-type buffer layer.
Arc stability and ablation characteristics in O2, N2, and air environments
Authors: Dong Keliang , Yang Zefeng , Luo Yunfeng , Ma Yaguang , Qian Pengyu , Wei Wenfu , Gao Guoqiang , Wu Guangning 
Published: June 2024

Abstract
Arcing is widely used in the processing and manufacturing of electrical materials. Arc duration and stability play a key role in the quality and efficiency of arc welding and cutting. Therefore, a platform for arc experiment and test analysis in a multi-atmosphere environment is built in this paper. The influence of the gas environments and pressures on arc breaking distance, arc stability, and ablation characteristics is explored. The experimental results show that the arc stability and arc breaking distance in the oxygen environment are significantly different from those in the air and nitrogen environment. This phenomenon is mainly caused by the strong electronegativity of oxygen and the Rayleigh–Taylor instability between the arc and the air. In addition, the variation of arc ablation characteristics under different gas environments and pressures is found. The influence mechanism of gas environments and pressures on arc breaking distance, arc stability, and ablation characteristics are cleared. The correlation mechanism between arc breaking distance and arc ablation characteristics is revealed. The research results provide theoretical support for improving the quality of electrical material processing and manufacturing and the service life of electric contact systems.
Evaluating the concordance of Egyptian and international sunspot observations
Authors: Moustafa Sayed S R , Khodairy Sara S 
Published: June 2024

Abstract
This study provides an exhaustive examination of the evolution of sunspot number (SSN) observations within Egypt, a nation celebrated for its profound astronomical legacy. Although Egypt has a well-established tradition of solar observation, the local SSN records spanning from 2010 to 2022 are compromised by a considerable frequency of absent data, thereby presenting substantial challenges to the precise assessment of solar activity. Addressing this challenge, the study employs dynamic time warping (DTW) as a methodological tool to assess the alignment of local and global SSN datasets. This technique adeptly harmonizes these datasets by reconciling temporal inconsistencies and variations in sampling rates. Subsequent to the application of DTW, the research integrates orthogonal regression for the imputation of the absent values in the Egyptian SSN dataset. This method, preferred for its proficiency in managing errors in both the dependent and independent variables, deviates from conventional linear regression techniques, thereby providing a more nuanced approach to data approximation. The investigation delineates a noteworthy statistical association between the locally-estimated SSN values and the global SSN indices. This correlation is characterized by a consistent pattern in which the locally-derived SSN are systematically lower in comparison to their global counterparts. Nevertheless, these local values display parallel trends and seasonal fluctuations akin to those observed in the global dataset, validating the imputation method and highlighting the unique characteristics of the Egyptian SSN data within the global context of solar activity monitoring. The implications of these findings are significant for the discipline of solar physics, especially for regions contending with incomplete datasets. The methodologies advanced in this research offer a robust framework for the enhancement of datasets with missing data, thus broadening the comprehension of solar phenomena.
Research on mobile robot path planning in complex environment based on DRQN algorithm
Authors: Wang Shuai , Du Yuhong , Lin Jingxuan , Zhao Shuaijie 
Published: June 2024

Abstract
A deep reinforcement Q learning algorithm (DRQN) based on radial neural network is proposed to achieve path planning and obstacle avoidance for mobile robots in complex ground environments with different types of obstacles, including static and dynamic obstacles. Firstly, the path planning problem is represented as a partially-observed Markov decision process. Steering angle, running characteristics, and other elements are introduced into the state-action decision space and the greedy factor is dynamically adjusted using a simulated annealing algorithm, which improves the mobile robot’s environment exploration and action selection accuracy. Secondly, the Q-learning algorithm is improved by replacing the Q-table structure with an RBF neural network to enhance the approximation ability of the algorithm’s function values, and the parameters of the implicit layer and the weights between the implicit and the output layer are trained using the dynamic clustering and least-mean methods respectively, which improves the convergence speed and enhances the ability of mobile robots to handle large-scale computation. Lastly, the double reward mechanism is set up to prevent the mobile robot from blind searching in unknown environments, which enhances the learning ability and improves path planning safety and flexibility at the same time. Different types of scenarios are set up for simulation experiments, and the results verified the superiority of the DQRN algorithm. Taking the 30 * 30 complex scene as an example, using the DQRN algorithm for path planning reduces the values of distance, turning angle, and planning time by 27.04%, 7.76%, and 28.05%, respectively, compared to the average values of Q-learning, optimized Q-learning, deep Q-learning, and DDPG algorithms, which can effectively improve the path planning efficiency for mobile robots in complex environments.
Monte Carlo simulations of W-Re alloys under helium ion bombardment
Authors: Zheng Huaqing , Liu Xiaoqiao , Zhang Xin , Shen Junfeng , Liu Sanqiu , Xu Yuhong , Lei Guangjiu , Li Heng , Cui Zilin , Hu Jun , Zhu Yiqin , Li Xiaolong , Geng Shaofei , Chen Xiaochang , Liu Haifeng , Wang Xianqu , Liu Hai , Cheng Jun , Tang Changjian 
Published: June 2024

Abstract
Based on the Monte Carlo simulation method, this study used the SDTrimSP software to explore the sputtering and vacancy distribution of

W

1
−
x

Re

x

(x = 0, 0.05, 0.10, 0.15, 0.20, 0.25) alloys with (110), (100), and (111) surfaces under helium ion bombardment. Since the surface binding energy in the SDTrimSP software is replaced by cohesive energy, this causes certain difference. So we used LAMMPS to re-scan the surface binding energy of three crystal planes with an index of one at different W-Re alloy ratios to enhance computational accuracy. Subsequently we input this value into the SDTrimSP software to compute the sputtering and vacancy under different incident energies and angles. The results show that (110) crystal plane has the smallest sputtering yield which is related to the surface binding energy. With the increasing concentration of Re atoms in the alloys, the sputtering yield of W-Re alloy linearly increases. Compared with pure W, the difference in sputtering yields and vacancies of W-Re alloys in three crystal planes are not significant. These findings can be valuable when selecting materials for plasma-facing applications in fusion reactor design.
Cosmological dynamics in f(R) gravity models through cosmographic energy conditions
Authors: Achi Tame , Singh Heisnam Shanjit 
Published: June 2024

Abstract
A proposed f(R) functional form’s constraints caused by energy conditions are presented. Raychaudhuri’s equation and the premise that gravity is attractive are both used to derive null and strong energy conditions for the proposed f(R) gravity model. Furthermore, the weak and dominant energy conditions are established by analysing the energy conditions induced by an effective energy-momentum tensor for the f(R)-theory of gravity. The most recent estimates of the cosmographic parameters that mimic Chaplygin gas-type dark energy are used on the parameters of a pair of f(R) models as a tangible extension of the energy conditions to the Robertson-Walker universe. It is found that under the various values of the coupling parameters the proposed f(R) model satisfy null, weak and dominant energy conditions while strong energy conditions are breached. Further, constraining the coupling parameters as a result of energy conditions, our analysis shows that the proposed model accurately captures the observed cosmic acceleration, as indicated by key parameters such as the effective equation of state (ω

eff
), and the deceleration parameter (q). Through a geometric analysis of cosmographic parameters, we observe deviations of f(R) gravity from the ΛCDM model. We identify distinct evolutionary pathways that resemble characteristics of either quintessence or Chaplygin gas dark energy across various epochs, indicating a dynamic rate of cosmic acceleration. Our findings highlight the significant influences of coupling parameters and initial conditions on the cosmic evolution.
Tuning band gaps in lead chalcogenides under pressure: implications for infrared detection applications
Authors: Sohrabikia Zeinab , Abedi Ravan Bahram , Jafari Mahmoud 
Published: June 2024

AbstractThis study employs first-principle calculations within density functional theory (DFT) to explore the structural, electronic, optical, and thermoelectric properties of lead chalcogenides (PbS, PbSe, and PbTe). The investigation focuses on their potential application as infrared photodetectors, leveraging their narrow-band gap semiconductor characteristics. The influence of pressure on the band gap and various electronic, optical, and thermoelectric properties is thoroughly analyzed. The calculated band gap values for PbS, PbSe, and PbTe are determined to be 0.29 eV, 0.18 eV, and 0.18 eV, respectively, aligning well with experimental data. Notably, the study reveals non-linear changes in band gap values under pressure, with phase transitions observed at specific pressure thresholds in PbS and PbSe, but not in PbTe. Under varying pressure conditions, the optical peaks shift towards lower energy levels with increased intensity. The static dielectric constant of PbS, PbSe, and PbTe exhibits distinct variations within pressure ranges of 0–8 GPa. Transport coefficients (S,σ, ke) are calculated using semi-classical Boltzmann theory across different temperatures and pressures, indicating that heavier compounds exhibit higher electrical and thermal conductivity values. At 300 K, the maximum ZT values are determined to be 0.85, 0.8, and 0.52 for PbS, PbSe, and PbTe, respectively. The study suggests enhanced thermoelectric properties of these structures at lower temperatures, particularly highlighting PbS and PbSe as promising candidates for thermoelectric applications below 500 K. Exploring the impact of pressure on the thermoelectric parameters of lead chalcogenides reveals interesting trends, with PbTe demonstrating higher thermoelectric efficiency under increased pressure compared to PbS and PbSe. These findings provide valuable insights into the potential applications and performance of lead chalcogenides in IR detection and thermoelectric systems.
Growth history and quasar bias evolution at z < 3 from Quaia
Authors: Piccirilli Giulia , Fabbian Giulio , Alonso David , Storey-Fisher Kate , Carron Julien , Lewis Antony , García-García Carlos 
Published: June 2024

Abstract
We make use of the Gaia-unWISE quasar catalogue, Quaia, to constrain the growth history out to high redshifts from the clustering of quasars and their cross-correlation with maps of the Cosmic Microwave Background (CMB) lensing convergence. Considering three tomographic bins, centred at redshifts z̅i
= [0.69, 1.59, 2.72], we reconstruct the evolution of the amplitude of matter fluctuations σ
8(z) over the last ∼ 12 billion years of cosmic history. In particular, we make one of the highest-redshift measurements of σ
8 (σ
8(z = 2.72) = 0.22 ± 0.06), finding it to be in good agreement (at the ∼ 1σ level) with the value predicted by ΛCDM using CMB data from Planck. We also used the data to study the evolution of the linear quasar bias for this sample, finding values similar to those of other quasar samples, although with a less steep evolution at high redshifts. Finally, we study the potential impact of foreground contamination in the CMB lensing maps and, although we find evidence of contamination in cross-correlations at z ∼ 1.7 we are not able to clearly pinpoint its origin as being Galactic or extragalactic. Nevertheless, we determine that the impact of this contamination on our results is negligible.
The role of vectors in reheating
Authors: Garcia Marcos A.G. , Kaneta Kunio , Ke Wenqi , Mambrini Yann , Olive Keith A. , Verner Sarunas 
Published: June 2024

Abstract
We explore various aspects concerning the role of vector bosons during the reheating process. Generally, reheating occurs during the period of oscillations of the inflaton condensate and the evolution of the radiation bath depends on the inflaton equation of state. For oscillations about a quadratic minimum, the equation of state parameter, w = p/ρ = 0, and the evolution of the temperature, T(a) with respect to the scale factor is independent of the spin of the inflaton decay products. However, for cases when w > 0, there is a dependence on the spin, and here we consider the evolution when the inflaton decays or scatters to vector bosons. We also investigate the gravitational production of vector bosons as potential dark matter candidates. Gravitational production predominantly occurs through the longitudinal mode. We compare these results to the gravitational production of scalars.