bluuebunny/crossref_metadata_2025_split huggingface dataset:
The history and mass content of cluster galaxies in the EAGLE simulation
Authors: Sifón Cristóbal , Han Jiaxin 
Published: April 2024

Aims.We explore the mass content of galaxies residing in galaxy clusters atz = 0 in the EAGLE cosmological hydrodynamical simulation. We also explore the galaxies’ mass build-up through cosmic time.Methods.We used a galaxy catalogue generated with theHBT+ algorithm, which identifies subhaloes consistently over time by tracking their dynamical evolution throughout the simulation.Results.The satellite subhalo-to-stellar mass relation (SHSMR) is well described by a double power law, becoming increasingly steeper with stellar mass. At stellar masses 9 < logm⋆/M⊙ < 10, satellites have 20−25% the subhalo mass of central galaxies at fixed stellar mass. At high stellar masses,m⋆ > 2 × 1011 M⊙, the satellite SHSMR is consistent with that of centrals. The satellite SHSMR decreases steeply for satellites closer to the cluster centre, even in projection, broadly consistent with recent weak lensing measurements. The scatter in the satellite SHSMR is larger than that of central galaxies at all cluster masses and cluster-centric distancesR < R200m. The SHSMR scatter decreases with stellar mass by about 12% over an order of magnitude, but this dependence can be explained by the mixing of infall times when binning by stellar mass. By splitting satellites into direct and indirect infallers (those that fell into their current host as a central galaxy or as the satellite of an infalling group, respectively) we clearly show the impact of pre-processing separately on satellite galaxies’ dark and stellar mass. There is significant dark matter pre-processing; the most recent infallers into massive clusters (M200m ≳ 1014 M⊙) had already lost up to 50% of their dark matter by the time of infall, particularly if they fell in indirectly as satellites of another host. On the contrary, on average, satellite galaxies are still gaining stellar mass at the time of infall and they do so for another 2 Gyr afterwards, although we see evidence of a slowing growth for indirect infallers. How much and for how long they continue to gain stellar mass depends primarily on the gas mass fraction available at infall. Overall, pre- and post-processing have similar impacts on the satellite SHSMR. Finally, we provide a simple prescription to infer the mean mass loss experienced by satellites as a function of cluster-centric distance based on a comparison to central galaxies, convenient for observational weak lensing measurements.
Populating the Milky Way
Authors: Boettner C. , Dayal P. , Trebitsch M. , Libeskind N. , Rice K. , Cockell C. , Tieleman B. I. 
Published: April 2024

Context.Stellar populations and their distribution differ widely across the Galaxy, which is likely to affect planet demographics. Our local neighbourhood is dominated by young, metal-rich stars in the galactic thin disc, while the stellar halo and galactic bulge host a large fraction of older, metal-poor stars.Aims.We study the impact of these variations on planet populations in different regions of the Galaxy by combining a high-resolution galaxy formation simulation with state-of-the-art planet population synthesis models.Methods.We constructed a population model to estimate occurrence rates of different planet types, based on the New Generation Planet Population Synthesis (NGPPS). We applied this model to a simulated Milky Way (MW) analogue in the HESTIA galaxy formation simulation. We studied the planet occurrence rate in the metal-rich regions of the inner Galaxy, namely, in the galactic bulge and thin disc. We compared these result with the frequencies in the more distant, metal-poor region such as the thick disc and stellar halo.Results.We find that the planet demographics in the central, metal-rich regions of the MW analogue differ strongly from the planet populations in the more distant, metal-poor regions. The occurrence rate of giant planets (>300M⊕) is 10–20 times larger in the thin disc compared to the thick disc, driven by the low amounts of solid material available for planet formation around metal-poor stars. Similarly, low-mass Earth-like planets around Sun-like stars are most abundant in the thick disc, being 1.5 times more frequent than in the thin disc. Moreover, low-mass planets are expected to be abundant throughout the galaxy, from the central regions to the outer halo, due to their formation processes being less dependent on stellar metallicity. The planet populations differ more strongly around Sun-like stars compared to dwarfs with masses 0.3–0.5M⊙, caused by a weaker correlation between [Fe/H] metallicity and planet mass. However, it is important to note that the occurrence rates of low-mass planets are still uncertain, making our findings strongly model-dependent. Massive planets are more comprehensively understood and our findings are more robust. Nonetheless, other systematic effects have the potential to alter the giant planet population that we have not addressed in this study. We discuss some of these limitations and offer further directions for future research.
The orbital parameters of theδCep inner binary system determined using 2019 HARPS-N spectroscopic data
Authors: Nardetto N. , Hocdé V. , Kervella P. , Gallenne A. , Gieren W. , Graczyk D. , Merand A. , Rainer M. , Storm J. , Pietrzyński G. , Pilecki B. , Poretti E. , Bailleul M. , Bras G. , Afanasiev A. 
Published: April 2024

Context.An inner companion has recently been discovered orbiting the prototype of classical Cepheids,δCep, whose orbital parameters are still not fully constrained.Aims.We collected new precise radial velocity measurements ofδCep in 2019 using the HARPS-N spectrograph mounted at the Telescopio NazionaleGalileo. Using these radial velocity measurements, we aimed to improve the orbital parameters of the system.Methods.We considered a template available in the literature as a reference for the radial velocity curve of the pulsation of the star. We then calculated the residuals between our global dataset (composed of the new 2019 observations plus data from the literature) and the template as a function of the pulsation phase and the barycentric Julian date. This provides the orbital velocity of the Cepheid component. Using a Bayesian tool, we derived the orbital parameters of the system.Results.Considering priors based on already publishedGaiaconstraints, we find for the orbital period a maximum a posteriori probability ofPorb = 9.32−0.04+0.03years (uncertainties correspond to the 95% highest density probability interval), and we obtain an eccentricitye = 0.71−0.02+0.02, a semimajor axisa = 0.029−0.003+0.002arcsec, and a center-of-mass velocityV0 = −17.28−0.08+0.08km s−1, among other parameters.Conclusions.In this short analysis we derive the orbital parameters of theδCep inner binary system and provide a cleaned radial velocity curve of the pulsation of the star, which will be used to study its Baade–Wesselink projection factor in a future publication.
Transition-Metal- and Photocatalyst-Free Photoinduced Formation of Carbon–Pnictogen (–N, –P) Bonds
Authors: Bhanja Rosalin , Bera Shyamal Kanti , Mal Prasenjit 
Published: April 2024

AbstractPnictogens, classified within group 15 elements, play a pivotal role in the constitution of a diverse array of drug molecules, natural products, and functional materials. Recent research has increasingly prioritized the exploration of mild conditions for synthesizing C–Pnictogen (C–N and C–P) bonds, highlighting a growing emphasis on efficient and sustainable synthetic methodologies. This Short Review explores fundamental mechanisms, addresses constraints, and assesses diverse methodologies, underscoring the potential of photocatalyst- and transition-metal-free photochemical reactions in advancing sustainability. Divided into two segments, it encompasses recent advancements in reactions facilitating C–N and C–P bond formation.1	Introduction2	Carbon–Nitrogen (C–N) Bond Formation3	Carbon–Phosphorus (C–P) Bond Formation4	Summary and Outlook
Culturally mixed co-branding product framing in China: the role of cultural sensitivity, product quality, and purchase probability
Authors: Chiu Candy Lim , Ho Han-Chiang , Xie Zhengqiao , Wu Qi , Yuan Yuqi 
Published: April 2024

AbstractChinese consumers have shown a strong preference for foreign brands (FBs) for many years. However, in recent years, rising patriotism has spurred Chinese consumers to source locally, indicating a shift in preference for patriotic brands (PBs). FBs operating in the world’s second-largest market are now framing their marketing strategies to appeal more to Chinese consumers. This study examines two culturally mixed co-branded product (CMCP) framing strategies:foreign × hostculture (FB × PB) andhost × foreignculture (PB × FB). The results show that the effects of product fit and cultural congruence on co-branding attitude forPB × FBis stronger than that ofFB × PB, and the influence of brand fit on co-branding attitude forFB × PBis stronger than that ofPB × FB. Additionally, the impact of the co-branding attitude on cultural sensitivity was significant forPB × FB, whereas that on product quality was significant for FB × PB. Furthermore, the effects of co-branding attitude on purchase probability were significant for both types of CMCP framing (FB × PB < PB × FB). Structural equation modeling was used to analyze the preferences of 479 Chinese consumers. This study provides significant recommendations for FBs and PBs to benefit from a strong wave of patriotism in China through culturally mixed framing and glocalization co-branding strategies.
E-band telecom-compatible 40 dB gain high-power bismuth-doped fiber amplifier with record power conversion efficiency
Authors: Donodin Aleksandr , Manuylovich Egor , Dvoyrin Vladislav , Melkumov Mikhail , Mashinsky Valery , Turitsyn Sergei 
Published: April 2024

Multi-band transmission is one of the key practical solutions to cope with the continuously growing demand on the capacity of optical communication networks without changing the huge existing fiber base. However, ultra-broadband communication requires the development of novel power efficient optical amplifiers operating beyond C- and L-bands, and this is a major research and technical challenge comparable to the introduction of the seminal erbium-doped fiber amplifiers that dramatically changed the optical communication sector. There are several types of optical fibers operating beyond C- and L-bands that can be used for the development of such amplifiers, specifically the fibers doped with neodymium, praseodymium, thulium, and bismuth. However, among these, Bi-doped fibers are of special interest as the most promising amplification medium because, unlike the others, different Bi-associated active centers allow amplification in an enormous band of overall width of 700 nm (1100–1800 nm). Such spectral coverage can be obtained by using different host materials, such as aluminosilicate, phosphosilicate, silica, and germanosilicate glasses. Here, we report a novel Bi-doped fiber amplifier with record characteristics for E-band amplification, including the highest power conversion efficiency among telecom-compatible E-band amplifiers reported to date. This bismuth-doped fiber amplifier (BDFA) features a maximum gain of 39.8 dB and a minimal noise figure of 4.6 dB enabled by 173 m Bi-doped fiber length. The maximum achieved power conversion efficiency of 38% is higher than that of L-band Er-doped fiber amplifiers. This performance demonstrates the high potential of BDFA for becoming the amplifier of choice in modern multi-band optical communication networks.
Strange property of physical quantities of some petal shape objects
Authors: Aghamohammadi Amir 
Published: April 2024

Abstract
We study various physical quantities of objects with petal shapes. N-petal shapes exhibit N-fold rotational symmetry. Furthermore, they might have an additional characteristic: the equation defining their boundaries could be represented by F(N
θ). We will show that physical quantities of objects with these characteristics may show strange properties. By ‘physical quantities’, we refer to aspects such as electric potential and electric field due to a charged petal-shaped plate or cylinder on the rotation axis, their mass and moment of inertia. We are going to show that for such objects, these physical observables do not depend on the number of petals, N. This intriguing result has a simple reason.
Experimental study of DC Kerr effect of chalcogenide glass film by free space coupling method
Authors: Cao Yinghao , Zhao Jianxing , Zhou Jianhong , Song Yinglin 
Published: April 2024

Abstract
Chalcogenide glass is an important nonlinear optical material that has attracted much attention in the areas of integrated photonics, supercontinuum sources, and all-optical switches in recent years. However, the current research mainly focuses on the nonlinear effect excited by light, and the research on its properties under the action of a DC field is still deficient. Here, a metal-cladding optical waveguide, which is composed of a chalcogenide glass film coated on a glass substrate, is presented to analyze the quadratic electro-optic (QEO) effect of the chalcogenide glass film. The DC Kerr coefficient and the whole components of the QEO tensor of the sample were experimentally determined by the free space coupling method.
A data-driven hybrid sensor fault detection/diagnosis method with flight test data
Authors: Song Jinsheng , Chen Ziqiao , Wang Dong , Wen Xin 
Published: April 2024

Abstract
Fault diagnosis of multi-source signal systems is critical for the safe and reliable operation of modern industrial systems, and accurate fault diagnosis of systems based on multi-source signals remains challenging. This study proposes a data-driven hybrid fault detection/diagnosis method to identify sensor faults in complex systems through interactions between multiple sensors. Dynamic mode decomposition with control is used to obtain the approximate model of the investigated system from multi-source signals, extract the underlying physical mechanisms, combined with the Kalman filter observer to generate the residual between the observed data and the predicted data. Then the residual (moving innovation covariance matrix
V

k
) is input into the k-nearest neighbor classification algorithm for fault detection and diagnosis. The effectiveness of the proposed method was evaluated using the flight test braking system dataset. The results showed that the accuracy of the proposed method in fault detection and diagnosis (with accuracies of 100% and 100%, respectively) was significantly improved than that of using raw signal data (76.6% and 6.38%) or raw signal data and

V

k

(80.85% and 42.55%). The analysis of different parameters including fault severity, algorithm hyperparameter

k

, and sensor type showed that the proposed method has high robustness, generalization ability, and practicality.
Long time asymptotics of large data in the Kadomtsev–Petviashvili models
Authors: Mendez Argenis J , Muñoz Claudio , Poblete Felipe , Pozo Juan C 
Published: April 2024

Abstract
We consider the Kadomtsev–Petviashvili (KP) equations posed on

R

2

. For both models, we provide sequential in time asymptotic descriptions of solutions obtained from arbitrarily large initial data, inside regions of the plane not containing lumps or line solitons, and under minimal regularity assumptions. The proof involves the introduction of two new virial identities adapted to the KP dynamics. This new approach is particularly important in the KP-I case, where no monotonicity property was previously known. The core of our results do not require the use of the integrability of KP and are adaptable to well-posed perturbations.
Valence band spectra and doping based alterations in band gap and electric modulus of Nd2NiMnO6
Authors: Abass Shohaib , Rather Mudasir Rashid , Sultan Khalid , Shahni Salma 
Published: April 2024

Abstract
Here in this paper, extending our earlier study, we have investigated the electrical properties of Sr doped Nd2NiMnO6 through the study of electric modulus. Nd2NiMnO6 has been doped with Sr by replacing Nd and the doping has not induced any new phase as all the samples of Nd2-xSrxNiMnO6 (x = 0.0, 0.1, 0.3) show monoclinic phase. Valence band spectra have been determined through x-ray photoemission spectroscopy and the absence of spectral density at Fermi energy EF for all the three samples indicates the insulating behavior with the sample having doping concentration x = 0.1 being the highly insulating of all the samples. Modulus study has been carried out in order to investigate more about the electrical properties by studying the dependence of real and imaginary part of modulus on frequency and temperature. The variation of real and imaginary part of electric modulus with the concentration of dopant has also been observed. The modulus study reveals the relaxation phenomenon in all the three samples. Further, we have determined the band gap of three samples through UV-Visible spectroscopy and the variation in the value of band gap with changing concentration of dopant Sr is in accordance with the conductivity plots already discussed in our earlier studies.
Exact ion acoustic N solitary waves with variable velocity in inhomogeneous plasma induced by charged space debris
Authors: Acharya S P , Mukherjee Abhik , Janaki M S 
Published: April 2024

Abstract
We have considered the propagation of nonlinear ion acoustic waves in a weakly inhomogeneous, cold (T

i
=0), collisionless space plasma in presence of charged space debris objects. The (1+1) dimensional evolution equation for the nonlinear ion acoustic wave is shown to have the form of a forced KdV equation with variable coefficients. The forcing term comes from the orbiting charged space debris and the variable coefficients of the forced KdV equation arise due to the equilibrium plasma quantities that depend on the slowly varying spatial coordinate. We have derived the exact one solitary wave, two solitary wave and then exact N solitary wave solutions of the forced system for some given choices of pinned debris functions where the velocity of the solitary waves varies with the slowly varying spatial coordinate. To the best of our knowledge, these exact, debris induced N solitary wave solutions with variable velocity in inhomogeneous plasma are important and new; hence may generate new ideas on research in this field.
Linearly polarized electromagnetic pulses
Authors: Lekner John 
Published: April 2024

Abstract
We construct theoretically a set of space-time localized electromagnetic pulses, characterized by a wavenumber

K

and a length

a
.

Their linear polarization becomes more perfect as

Ka

increases and the pulse becomes more nearly monochromatic. Two measures of the degree of linear polarization are explored: one that gives the polarization at any point in space-time, and another that integrates the electric intensity over the focal plane of the pulse as the pulse passes through. The polarization measures and the total energy, momentum, and angular momentum of these pulses are calculated for all

K

and

a
.

The fields of these pulses satisfy the Maxwell equations exactly.
Generating Bell states and Werner states of two qubits via optical field
Authors: Jiang Dengkui , Zhai Cuilu , Song Yaju , Peng Zhaohui , Yuan Jibing , Tang Shiqing , Lu Wangjun 
Published: April 2024

Abstract
In this paper, we investigate how the evolution of the states of two qubits initially in a direct product state can be controlled by the optical field in a Tavis-Cummings (TC) model. For the two qubits initially in the direct product state, we find that their matrix elements at any moment can be modulated by the coefficients of the optical field initial states in the number state space. We propose a method for preparing an X-type state of two qubits. Subsequently, for descriptive convenience, we divide the Bell states of the two qubits into two kinds in the paper. When both qubits are initially in the ground state, we find that the two qubits can be controlled to produce the first type of Bell state by the superposition state optical field that is initially in the next-nearest-neighbor number state and that the production of any of the first type of Bell states can be controlled by controlling the phase between the two next-nearest-neighbor number states. When one of the two qubits is in the ground state, and the other is in the excited state, we can control the two qubits to produce the second type of Bell state by the single-photon number state optical field. Finally, we study the generation of Werner states by controlling two qubits initially, both in the ground state, using an optical field.
Dynamical system analysis of scalar field cosmology in coincident f(Q) gravity
Authors: Ghosh Sayantan , Solanki Raja , Sahoo P K 
Published: April 2024

Abstract
In this article, we investigate scalar field cosmology in the coincident f(Q) gravity formalism. We calculate the motion equations of f(Q) gravity under the flat Friedmann-Lemaître-Robertson-Walker background in the presence of a scalar field. We consider a non-linear f(Q) model, particularly f(Q) = − Q + α
Q

n
, which is nothing but a polynomial correction to the Symmetric Teleparallel Equivalent to General Relativity (STEGR) case. Further, we assumed two well-known specific forms of the potential function, specifically the exponential from V(ϕ) = V
0
e
−β
ϕ
and the power-law form V(ϕ) = V
0
ϕ
−k
. We employ some phase-space variables and transform the cosmological field equations into an autonomous system. We calculate the critical points of the corresponding autonomous systems and examine their stability behaviors. We discuss the physical significance corresponding to the exponential case for parameter values n = 2 and n = − 1 with β = 1, and n = − 1 with

β
=

3

. Moreover, we discuss the same corresponding to the power-law case for the parameter value n = − 2 and k = 0.16. We also analyze the behavior of corresponding cosmological parameters such as scalar field and dark energy density, deceleration, and the effective equation of state parameter. Corresponding to the exponential case, we find that the results obtained for the parameter constraints in Case III is better among all three cases, and that represents the evolution of the Universe from a decelerated stiff era to an accelerated de-Sitter era via matter-dominated epoch. Further, in the power-law case, we find that all trajectories exhibit identical behavior, representing the evolution of the Universe from a decelerated stiff era to an accelerated de-Sitter era. Lastly, we conclude that the exponential case shows better evolution as compared to the power-law case.
Path integral formulation for Dunkl-Dirac oscillator in (1+1)-dimensional space-time coordinates
Authors: Benzair H , Boudjedaa T , Merad M 
Published: April 2024

Abstract
In this paper, we extend the path integral formalism for the Dirac oscillator in (1+1) dimension by replacing the spatial derivative with the Dunkl derivative. Utilizing representations in position space-time coordinates, we precisely calculate the propagator, expressed in terms of generalized Hermite polynomials. The energy eigenvalues of the electron, along with their corresponding wave functions, are determined. In special cases, we can precisely evaluate the non-relativistic energy eigenvalues and wave functions, even in the absence of Dunkl parameters.