bluuebunny/crossref_metadata_2025_split huggingface dataset:
Adsorption of C2–C5 alcohols on ice: A grand canonical Monte Carlo simulation study
Authors: Joliat Julien , Picaud Sylvain , Patt Antoine , Jedlovszky Pal 
Published: May 2022

In this paper, we report grand canonical Monte Carlo simulations performed to characterize the adsorption of four linear alcohol molecules, comprising between two and five carbon atoms (namely, ethanol, n-propanol, n-butanol, and n-pentanol) on crystalline ice in a temperature range typical of the Earth’s troposphere. The adsorption details analyzed at 228 K show that, at low coverage of the ice surface, the polar head of the adsorbed molecules tends to optimize its hydrogen bonding with the surrounding water, whereas the aliphatic chain lies more or less parallel to the ice surface. With increasing coverage, the lateral interactions between the adsorbed alcohol molecules lead to the reorientation of the aliphatic chains that tend to become perpendicular to the surface; the adsorbed molecules pointing thus their terminal methyl group up to the gas phase. When compared to the experimental data, the simulated and measured isotherms show a very good agreement, although a small temperature shift between simulations and experiments could be inferred from simulations at various temperatures. In addition, this agreement appears to be better for ethanol and n-propanol than for n-butanol and n-pentanol, especially at the highest pressures investigated, pointing to a possible slight underestimation of the lateral interactions between the largest alcohol molecules by the interaction potential model used. Nevertheless, the global accuracy of the approach used, as tested under tropospheric conditions, opens the way for its use in modeling studies also relevant to another (e.g., astrophysical) context.
Transition now? Another coup d’état in Burkina Faso
Authors: Engels Bettina 
Published: May 2022

SUMMARY
The briefing explores the dynamics underpinning the coup d’état in Burkina Faso that took place on 24 to 25 January 2022. It does so by discussing the putschists’ justification to fight threats by non-state armed groups and situates the coup in the history of Burkina Faso. Since formal independence the country has been characterised by strikes, military coups and constitutional referendums. In contrast to 2015, however, when broad popular resistance forced a group of military putschists out of office after only a few days, the trade unions and mass organisations this time do not mobilise active resistance, though in principle they oppose military coups. The briefing raises questions regarding whether the ‘transition phase’ will deliver any substantial change, what might be seen as legitimate forms of regime change, and what the character of political authority is in Burkina Faso, how it might be delivered and by whom.
Convergence study and regularizing property of a modified Robin–Robin method for the Cauchy problem in linear elasticity
Authors: Ellabib Abdellatif , Nachaoui Abdeljalil , Ousaadane Abdessamad 
Published: May 2022

Abstract
In this paper, we are interested in solving a Cauchy inverse problem in linear elasticity. For this, we propose a new method based on Robin conditions on the inaccessible boundary, then we study the convergence and regularizing property of the proposed algorithm. We use the finite element method for the discretization of our problem. Further, we treat the spectrum analysis of the discrete problem in order to study the convergence behavior of the proposed method in the discrete case. Finally, we present numerical results which show the efficiency and stability of the proposed approach in the presence of perturbed data. The robustness of the proposed algorithm is also performed for the anisotropic and heterogeneous cases.
Slow light in topological coupled-corner-state waveguide
Authors: Liu Lei , Wang Yueke , Li Mingxing , Zheng Feixiang , Zhou Haiquan 
Published: May 2022

Abstract
We theoretically propose a uide (CCSW), which is composed of a zigzag edge-like structure based on C-4 symmetrical lattice. CCSW mode is achieved by weak coupling between a sequence of higher order topological corner state (TCS). Based on the tight-binding approximation, the flat dispersion relation of CCSW mode is obtained, and suitable for slowing down light. The characteristics of slow light, including the group index, group velocity dispersion, normalized bandwidth and normalized delay-bandwidth product, are discussed in detail. At the Eigen frequency of individual TCS, the group velocity dispersion of CCSW mode is zero. Importantly, the CCSW mode shows strong robustness when introducing disorders, compared with the conventional Coupled-Resonator-Optical Waveguide based on photonic crystal defect cavities. Our findings may find topological slow light applications such as optical buffers, the processing of optical signals, optical delay lines and so on.
Distribution characteristics for initial time delay of streamer of shielding spheres under operating impulse voltage at high altitudes
Authors: Geng Jianghai , Cheng Yuzhou , Wang Ping , Lü Fangcheng , Ding Yujian , Yao Xiuyuan , Jiang Ling 
Published: May 2022

Abstract
With continuous promotion of construction of ultra high voltage DC projects in high-altitude areas, it is of important theoretical and practical engineering significance to study long gap discharge characteristics at high altitudes. As the initial and key stage for development of long air gap discharge, the initial stage of streamer reflects the randomness of long gap discharge to a certain extent, and time delay characteristics are important indicators to reflect the randomness. In this paper, we build a photoelectric detection system based on the photomultiplier tube and photoelectric integrated sensor, carry out an operating impulse discharge test of long gap of the shielding sphere-plate with different diameters at altitudes of 50 m and 2200 m respectively, obtain the space field strength, optical power, discharge current and voltage of the whole process of discharge development, and analyze the characteristics of boost time delay and statistical time delay of streamer based on the photoionization model and Weibull Distribution model. According to study results, the average value

T
‾

and dispersibility of initial time delay of streamer increase with the increase of altitude and electrode diameter; the boost time delay t
0 of streamer decreases with increase of altitude and increases with increase of electrode size; the statistical time delay t
s of streamer can properly comply with Weibull distribution, and its characteristic parameter has a clear physical meaning. The dispersibility of statistical time delay will increase with altitude and electrode size, and compared with electrode size, altitude has a greater impact on the dispersibility of statistical time delay. The study results of this paper have important guiding value for selection and optimization on clear distance of the valve hall of a converter station in high altitude areas.
Co-deposition of MoS2 films by reactive sputtering and formation of tree-like structures
Authors: Kim Myeongok , Giteau Maxime , Ahsan Nazmul , Miyashita Naoya , Thirumalaisamy Logu , Chen Chen , Redwing Joan M , Okada Yoshitaka 
Published: May 2022

Abstract
Transition metal dichalcogenides are versatile layered materials with potential applications ranging from optoelectronic devices to water splitting. Top-down fabrication methods such as exfoliation are not practical for a large-scale production of high-quality devices: a bottom-up approach such as sputtering, a low-temperature deposition method, is more suitable. However, due to its anisotropic nature, the growth mechanism of molybdenum disulfide (MoS2) via sputtering is complex and remains to be investigated in detail. In this paper, we study the growth of MoS2 films co-deposited by using a sulfur (S) hot-lip cell and a molybdenum (Mo) sputtering target via reactive sputtering. The impact of S partial pressure on the structure and morphology of MoS2 films was systematically characterized, and it was observed that the growth is dominated by vertically-oriented sheets with horizontal branches, resulting in a tree-like structure. The growth front of the structures is ascribed to the anisotropic incorporation of adatoms with regards to the orientation of MoS2.
Interfacial electronic properties of metal/CsSnBr3 heterojunctions
Authors: Li Jing , Guo Xinwei , Cai Bo , Hu Yang , Liu Gaoyu , Guo Tingting , Song Xiufeng , Zeng Haibo , Zhang Shengli 
Published: May 2022

Abstract
All-inorganic lead-free perovskite CsSnBr3, has been proved good stability and optoelectronic properties in theory and experiment. However, the interfacial electronic properties of metal/CsSnBr3 are still unclear in electronic devices. Herein, we systematically investigate the interfacial properties of metal electrodes (Al, Ag and Au) and CsSnBr3 with different atomic terminals (SnBr2-T and CsBr-T) through the first-principles calculation. SnBr2-T and CsBr-T have various contact types and Schottky barriers due to their different interaction strengths with metals. In particular, the moderate interlayer coupling strength with Al leads to the ultra-low Schottky barrier and tunneling barrier, which makes Al possess the best contact performance among the studied metals. Furthermore, the external electric field can be effective in regulating the Schottky barrier and realizing the Ohmic contact. These findings provide useful guidance for the design of perovskite-based nanoelectronic devices with high performance.
The quantum confinement effects on the electronic properties of monolayer GeS nanoribbon with tube-edged reconstruction
Authors: Kong Weizheng , Zhang Yanxue , Jiang Xue , Su Yan , Liu Hongsheng , Gao Junfeng 
Published: May 2022

Abstract
Monolayer α-phase GeS is promising for many novel applications due to its high carrier mobility and suitable band gap. Recently, the metal and nonmetal zigzag edges of monolayer α-phase GeS have been predicted to undergo universal ZZ(Ge-Tube)/ZZ(S-R) edge reconstruction. Therefore, studies on GeSNR should be reconsidered. In this paper, we study the quantum confinement effects on the electronic properties of edge reconstructed monolayer GeS nanoribbon (GeSNR) by using first-principles calculations. As width of the nanoribbon increases from 10 to 41 Å, the band gap keeps indirect and linearly decreases from 1.57 to 0.87 eV. Robust spatial separation of valence band maximum and conduction band minimum exist in reconstructed GeSNR with width larger than 19 Å. Moreover, high carrier mobility is expected in the reconstructed GeSNR. Our results suggest that reconstructed GeS nanoribbon is an important candidate for optoelectronics and photocatalytic.
Time evolution of neutral and charged species in Ar/C2H2 capacitively-coupled RF discharges
Authors: Jiménez-Redondo Miguel , Tanarro Isabel , Herrero Víctor J 
Published: May 2022

Abstract
The first stages of polymerization in plasmas of Ar/C2H2 have been studied both experimentally and using a kinetic model, by following the time evolution of the main neutral and ionic species in the discharge. The abundances of the different neutrals and ions have been measured by quadrupole mass spectrometry in conditions specifically chosen to avoid dust formation in the plasma. Maxima occurring at different times from the ignition of the discharge were detected for the density of the neutral species sampled, generally consistent with a stepwise polymerization mechanism. Ions were found to fundamentally follow the trend of their neutral counterparts, with the time evolution for negative ions stressing the difference in the chemical mechanisms responsible for the formation of the two primitive anions, C2H− and H2CC−. Positive and negative ion distributions were measured in the steady state of the discharge. Detection of anions with up to 22 carbon atoms was possible in mixtures with high acetylene content. A volume averaged kinetic model with a simple description of the Ar/C2H2 chemistry was used to identify the main reaction pathways and was able to satisfactory reproduce the experimental results.
Exploring the potential structural, optical, dielectric facets and in-vitro behavior of combeite synthesized by the sol-gel route
Authors: Kolli Nishant Kumar , Kanikaram Sai Phalguna , Rai Krisanta , Kundu Swarup , Roy Santanu 
Published: May 2022

Abstract
The current study combeite (Na2Ca2Si3O9) was synthesized by the sol-gel route and an attempt was made to investigate its various features. The formation of a pure phase was confirmed using the powder x-ray diffraction technique. Dielectric measurements were performed on the synthesized material over a wide range of temperature and frequency. The optical band gaps were found to be in the range 1.5–2.8 eV. The in-vitro acellular immersion studies showed the formation of apatite on the surface of combeite. The cell proliferation assay indicated enhanced cell viability in the case of combeite when compared to calcium phosphate. These results of this study have implications for various industrial and medical applications.
Relativistic Hartree–Fock model and its recent progress on the description of nuclear structure
*
Authors: Long W H , Geng J , Liu J , Wang Z H 
Published: May 2022

Abstract
Regarding the stage progress on the relativistic Hartree–Fock (RHF) model achieved recently, we review the extensive developments of the model itself, including the descriptions of axially deformed unstable nuclei and nuclear spin-isospin excitations, which shows that a complete RHF framework is now available for exploring the tensor force effects in both ground state and excited states of unstable nuclei. Meanwhile, the recent RHF descriptions of the pseudo-spin symmetry restoration and the new magicity are also reviewed. It shows that the Fock terms, particularly the

ρ

-tensor coupling and naturally introduced tensor force components, bring about significant improvements in maintaining the delicate in-medium balance of nuclear attractions and repulsions, and uniformly interpreting the emergence of new magicity in 52,54Ca. The revealed microscopic mechanisms not only deepen our understanding on the properties of nuclear structure, but also help to guide the further development of the effective nuclear force.
Pulsar Survey With the QiTai 110 m Radio Telescope
Authors: Xie Jin-Tao , Wang Jing-Bo , Wang Na , Hu Yue 
Published: May 2022

Abstract
With a collecting area of 9400 m2, the Xinjiang QiTai 110 m radio Telescope (QTT) will allow for a significant advance in the search and observation of pulsars. We have updated the galactic electron density model, scattering model, spectral distribution, and radial distribution of PsrPopPy to generate the population of isolate radio pulsars in the Galaxy. The spiral arm, including the local spiral arm, is considered when generating pulsar locations. By simulation, we estimate the number of previously undetected radio pulsars that QTT will discover with its possible receivers for different strategies. Using the PAF receiver, 2200 previously unknown pulsars could be discovered in 43 days. The 96-beam PAF receiver can produce ∼10.56 GB of data per second.
Correlation between Brightness Variability and Spectral Index Variability for Fermi Blazars
Authors: Yang Wen-Xin , Xiao Hu-Bing , Wang Hong-Guang , Yang Jiang-He , Pei Zhi-Yuan , Wu De-Xiang , Yuan Yu-Hai , Fan Jun-Hui 
Published: May 2022

Abstract
In this work, the γ-ray photon flux, photon spectral index (α
ph), variability index (

log

V
.
I
.

), and the synchrotron peak frequency (

log

ν

p

) are compiled for 851 common blazars from the 3FGL and 4FGL catalogs and Fan et al. to investigate variability properties for Fermi blazars. Our calculations and analyses reach following results: (1) the averaged luminosity, spectral index, and variability index of FSRQs are higher than those of BL Lacs for the whole sample. (2) It is found that the spectral index variation is closely anti-correlated with the luminosity variation implying that the spectrum becomes harder when the source becomes brighter in the γ-ray band. (3) Positive correlations are found between the photon spectral index and both γ-ray luminosity and variability index (

log

V
.
I
.

) for the whole sample, but anti-correlations are found in the two correlations for FSRQs. For BL Lac subclass, there is a marginal anti-correlation between the photon spectral index and both γ-ray luminosity, and a positive correlation between the photon spectral index and the variability index (

log

V
.
I
.

). We think those two positive correlations found for the whole sample are apparent. (4) We adopted the SVM machine learning method to separate BL Lacs and FSRQs in the

α

ph

versus

log

L

γ

and

α

ph

versus

log

V
.
I
.

plots and proposed that a BCU is an FSRQ candidate if it satisfies

log

V
.
I
.

>

−
10.119
α
+
24.855

, or

α

ph

>
−
0.048

log

L

γ

+
4.498

, otherwise, it is a BL Lac candidate. Our classification results are quite consistent with those by Kang et al (2019).
Probing the Progenitor of High-z Short-duration GRB 201221D and its Possible Bulk Acceleration in Prompt Emission
Authors: Yuan Hao-Yu , Lü Hou-Jun , Li Ye , Zhang Bin-Bin , Sun Hui , Rice Jared , Yang Jun , Liang En-Wei 
Published: May 2022

Abstract
The growing observed evidence shows that the long- and short-duration gamma-ray bursts (GRBs) originate from massive star core-collapse and the merger of compact stars, respectively. GRB 201221D is a short-duration GRB lasting ∼0.1 s without extended emission at high redshift z = 1.046. By analyzing data observed with the Swift/BAT and Fermi/GBM, we find that a cutoff power-law model can adequately fit the spectrum with a soft

E

p

=

113

−
7

+
9

keV, and isotropic energy

E

γ
,
iso

=

1.36

−
0.14

+
0.17

×

10

51

erg

. In order to reveal the possible physical origin of GRB 201221D, we adopted multi-wavelength criteria (e.g., Amati relation, ε-parameter, amplitude parameter, local event rate density, luminosity function, and properties of the host galaxy), and find that most of the observations of GRB 201221D favor a compact star merger origin. Moreover, we find that

α

ˆ

is larger than

2
+

β

ˆ

in the prompt emission phase which suggests that the emission region is possibly undergoing acceleration during the prompt emission phase with a Poynting-flux-dominated jet.
Comparison of the Coronal Green-line Intensities with the EUV Measurements from SDO/AIA
Authors: Zhang Xue-Fei , Liu Yu , Zhao Ming-Yu , Liu Ji-Hong , Elmhamdi Abouazza , Song Teng-Fei , Li Zi-Han , Li Hong-Bo , Sha Fei-Yang , Wang Jing-Xing , Li Xiao-Bo , Shen Yuan-Deng , Liu Shun-Qing , Liang Hong-Fei , Al-Shammari R. M. 
Published: May 2022

Abstract
The intensity of the green line (Fe xiv 5303 Å) is the strongest in the visible spectrum of the solar corona, and this line has been used as long-term powerful diagnostic tools for studying the coronal configurations and hot plasma dynamics. However, it remains unclear and an open question whether there exists close relationship between the green line intensities and the coronal extreme ultraviolet (EUV) line emissions for various coronal structures. In this paper, we use the green-line data by the Lijiang YOGIS Lyot coronagraph and the EUV data from the Solar Dynamics Observatory/Atmospheric Imaging Assembly instruments in order to perform direct comparisons and analyses, based on two algorithms developed to extract particular features in the low corona. It is found that, among the correlation coefficients obtained between the intensities of 5303 Å and the EUV lines, the coefficients between the green line and the 211 Å wavelength for different coronal structures and different limb locations always keep the highest values (ranging from 0.89 to 0.99), which has not been reported before. This result can be helpful and promising to link together the various physical processes involved at different heights in the corona by precisely tracking the bright loops or other features observed in 5303 Å above the limb down to the correct surface locations revealed by the 211 Å data. Furthermore, the ground-based observations of the coronal green line and the space-based EUV observations at 211 Å can advantageously complement each other when there is a need.
The Physical Properties and Starspot Activity of the Triple System KIC 6525196
Authors: Pan Yang , Fu Jian-Ning , Zhang Xiao-Bin , Wang Jia-Xin , Li Chun-Qian 
Published: May 2022

Abstract
We present the results of photometric and spectroscopic analyses for the triple-lined system KIC 6525196, an eclipsing binary accompanied by a third star. By modeling the Kepler light curves and radial velocities from LAMOST and HIDES observations, absolute parameters of the system are determined. Both components of the eclipsing binary are found to be solar-like stars with masses and radii of M
1 = 1.0286 ± 0.0026 M
⊙, R
1 = 1.127 ± 0.008 R
⊙, and M
2 = 0.9667 ± 0.0024 M
⊙, R
2 = 0.963 ± 0.007 R
⊙. The mass of the third star is determined to be M
3 = 0.772 ± 0.010 M
⊙. With the out-of-eclipse light residuals, we measure rotation period and decay timescale of an active region by using the autocorrelation function. In comparison to the Sun, the activity level of the system is significantly stronger. In addition, a possible short photometric activity cycle of ∼244 days is detected.
Initial results from boron powder injection experiments in WEST lower single null L-mode plasmas
Authors: Bodner G. , Gallo A. , Diallo A. , Lunsford R. , Moreau Ph. , Nagy A. , Pellissier F.-P. , Guillemaut C. , Gunn J.P. , Bourdelle C. , Desgranges C. , Manas P. , Bortolon A. , Klepper C.C. , Tsitrone E. , Unterberg E.A. , Vermare L. , the WEST Team  
Published: May 2022

Abstract
Using a recently installed impurity powder dropper (IPD), boron powder (<150 μm) was injected into lower single null (LSN) L-mode discharges in WEST. IPDs possibly enable real-time wall conditioning of the plasma-facing components and may help to facilitate H-mode access in the full-tungsten environment of WEST. The discharges in this experiment featured I
p = 0.5 MA, B
T = 3.7 T, q
95 = 4.3, t
pulse = 12–30 s, n
e,0 ∼ 4 × 1019 m−2, and P
LHCD ∼ 4.5 MW. Estimates of the deuterium and impurity particle fluxes, derived from a combination of visible spectroscopy measurements and their corresponding S/XB coefficients, showed decreases of ∼50% in O+, N+, and C+ populations during powder injection and a moderate reduction of these low-Z impurities (∼50%) and W (∼10%) in the discharges that followed powder injection. Along with the improved wall conditions, WEST discharges with B powder injection observed improved confinement, as the stored energy W
MHD, neutron rate, and electron temperature T
e increased significantly (10%–25% for W
MHD and 60%–200% for the neutron rate) at constant input power. These increases in confinement scale up with the powder drop rate and are likely due to the suppression of ion temperature gradient (ITG) turbulence from changes in Z
eff and/or modifications to the electron density profile.
Erratum: The open XXZ chain at Δ = −1/2 and the boundary quantum Knizhnik–Zamolodchikov equations (2021 J. Stat. Mech.
013104)
Authors: Hagendorf Christian , Liénardy Jean 
Published: May 2022

Abstract
The open XXZ spin chain with the anisotropy parameter

Δ
=
−

1

2

and diagonal boundary magnetic fields that depend on a parameter x are studied. For real x > 0, the exact finite-size ground-state eigenvalue of the spin-chain Hamiltonian is explicitly computed. In a suitable normalisation, the ground-state components are characterised as polynomials in x with integer coefficients. Linear sum rules and special components of this eigenvector are explicitly computed in terms of determinant formulas. These results follow from the construction of a contour-integral solution to the boundary quantum Knizhnik–Zamolodchikov equations associated with the R-matrix and diagonal K-matrices of the six-vertex model. A relation between this solution and a weighted enumeration of totally-symmetric alternating sign matrices is conjectured.