bluuebunny/crossref_metadata_2025_split huggingface dataset:
Indications of an offset merger in Abell 3667
Authors: Omiya Y. , Nakazawa K. , Tamura T. , Akamatsu H. , Matsushita K. , Okabe N. , Sato K. , Fujita Y. , Gu L. , Simionescu A. , Ichinohe Y. , Riseley C. J. , Akahori T. , Ito D. , Sakai K. , Kurahara K. 
Published: June 2024

Context. Cluster mergers are the most energetic events, releasing kinetic energies of up to 1064 erg and involving megaparsec(Mpc)-scale shocks in their intra-cluster medium (ICM). In merging clusters, cold fronts are frequently observed, which are characterized by temperature and density jumps while maintaining constant pressure. They, together with the overall morphology of the ICM, provide important information for our understanding of the merging structure, such as velocity, impact parameter, and mass.
Aims. Abell 3667 is a nearby (z = 0.056) merging cluster with a prominent cold front and a pair of two bright radio relics. Assuming a head-on merger, the origin of the cold front is often considered to be a remnant of the cluster core stripped by its surrounding ICM. Some authors have proposed an offset merger scenario in which the subcluster core rotates after the first core crossing. This scenario can reproduce features such as the cold front and a pair of radio relics. To distinguish between these scenarios, we reanalyzed the ICM distribution and measured the line-of-sight bulk ICM velocity using the XMM-Newton PN data.
Methods. We created an unsharp masked image to identify ICM features, and analyzed X-ray spectra to explore the ICM thermodynamical state. Applying the new XMM-Newton European Imaging Camera (EPIC)–PN calibration technique using background emission lines, the line-of-sight bulk ICM velocities were also measured.
Results. In the unsharp masked image, we identify several ICM features, some of which we detect for the first time. We confirm the cold front and note an enhanced region extending from the cold front to the west (named “CF-W tail”). There is an enhancement of the X-ray surface brightness extending from the first brightest cluster galaxy (BCG) to the cold front, which is named the “BCG-E tail”. The notable feature is a “RG1 vortex”, which is a clockwise vortex-like enhancement with a radius of about 250 kpc connecting the first BCG to the radio galaxy (RG1). It is particularly enhanced near the north of the 1st BCG, which is named the “BCG-N tail”. The thermodynamic maps show that the ICM of the RG1 vortex has a relatively high abundance of 0.5−0.6 solar compared to the surrounding regions. The ICM of the BCG-E tail also has a high abundance and low pseudo-entropy and can be interpreted as a remnant of the cluster core’s ICM. Including its arc-like shape, the RG1 vortex supports the idea that the ICM around the cluster center is rotating, which is natural for an offset merger scenario. The results of the line-of-sight bulk ICM velocity measurements show that the ICM around the BCG-N tail is redshifted with a velocity difference of 940 ± 440 km s−1 compared to the optical redshift of the first BCG. We obtain other indications of variations in the line-of-sight velocity of the ICM and discuss these in the context of an offset merger.
Successful Reablation Hemostasis for Needle Tract Bleeding Following Colorectal Liver Metastasis Percutaneous Microwave Ablation: A Case Report
Authors: Phothong Thanakorn , Janjindamai Phurich , Hongsakul Keerati , Laohawiriyakamol Supparerk 
Published: June 2024

AbstractPercutaneous ablation is a well-established alternative treatment for colorectal liver metastasis. Major complications after percutaneous ablation are less common but can occur. Few intervention options for immediate hemostasis after percutaneous ablation have been described, with most involving embolization or surgery. Recently, a few reports have shown good results of percutaneous heat ablation for hemostasis in needle tract bleeding. We report a case involving a 78-year-old woman who developed needle tract bleeding immediately after percutaneous microwave ablation for colorectal liver metastasis. The bleeding was successfully controlled using a reablation technique.
Persuading the emperors: a quantitative historical analysis of political rhetoric in traditional China
Authors: Hong Ze , Chen Yuqi 
Published: June 2024

AbstractThe study of rhetoric has a long history in the Western intellectual tradition. However, only minimal efforts have been made to rigorously examine the cultural evolution of various rhetorical strategies in argumentation over time. In this study, we harness the power of fully digitized Chinese dynastic history to systematically analyze how different rhetorical strategies were used to persuade superiors throughout the past two millennia. By leveraging existing literature on Chinese rhetoric and argumentation styles, as well as engaging in extensive consultation with historians of ancient China, we identify and classify rhetorical strategies into distinct categories. We then examine their recorded success in persuasion and any temporal changes in frequency. Our findings point to a cumulative payoff-biased cultural evolution where later dynasties tend to demonstrate higher recorded persuasion success, with the notable exception of the Ming dynasty. Additionally, we detect a temporal decline in the frequency of rhetorical strategies associated with persuasion failures, such as analogy and the use of auspicious/inauspicious signs.
Regional differences of agricultural total factor carbon efficiency in China
Authors: Huang Xiuquan , Zhang Tao , Wang Xi , Zheng Jiansong , Xu Guoli , Wu Xiaoshan 
Published: June 2024

AbstractChina’s agriculture has struggled over the past century to produce more food to feed the country’s expanding population while also contending with high-intensity pollution. In order to support China’s transition to low-carbon agriculture more efficiently, it is important to improve the efficiency of agricultural carbon emissions. This study employs the biennial weight modified Russell model to investigate China’s agricultural total factor carbon efficiency (ATFCE) during 1999–2018 and its differences between the three agricultural functional zones (AFZs), including the grain-producing zone (GPZ), the grain balance zone (GBZ), and the main grain-selling zone (GSZ). The study found that the ATFCE in China was 0.761, a high value. GSZ (0.9865) had the highest ATFCE, followed by GBZ (0.7201) and GPZ (0.6666). ATFCE in China fell by approximately 25%, from 0.825 in 1999 to 0.6983 in 2018. Further, the provinces with the highest ATFCE included Tibet (0.9997), Hainan (0.9981), Shanghai (0.997), Beijing (0.9937), and Jiangsu (0.9924). Provinces with the lowest ATFCEs included Hubei (0.4743), Yunnan (0.4645), Hunan (0.441), Anhui (0.4295), Heilongjiang (0.4130), and Jiangxi (0.3354). In addition, the difference in ATFCE within the whole of China, GPZ, and GBZ generally widened during 1999–2018. There was a rise in all three inequalities between the three AFZs. The difference between GPZ and GBZ was the greatest among the three interregional differences. Finally, the difference between subregions was the largest source of the total difference (43.66%), followed by the difference within subregions (30.04%) and the intensity of transvariation (25.94%).
Suppression or promotion: research on the impact of industrial structure upgrading on urban economic resilience
Authors: Zhang Lu , Lin Guodong , Lyu Xiao , Su Wenjie 
Published: June 2024

AbstractIndustrial The upgrading of industrial structure, as the main means of urban economic transformation, plays a crucial role in the process of achieving urban economic resilience construction. We conducted a study on the nonlinear impact mechanism of industrial structure upgrading on urban economic resilience based on panel data from 267 prefecture-level and above-level cities and above in China from 2008 to 2021, using globalization as a threshold variable. The obtained results demonstrated the following: (1) there existed a significant nonlinear relationship between industrial structure upgrading and rationalization and urban economic resilience, with a significant double threshold effect. (2) A robustness test was performed by removing extreme values from the sample, controlling for the time series and individual interaction terms while considering control variables, which did not change the basic conclusions based on the model. This demonstrated that the threshold regression model constructed in this study is robust and reliable. (3) From a regional heterogeneity perspective, the impact of industrial structure upgrading on urban economic resilience varied among different regions. Notably, industrial structure upgrading imposed a significant double threshold effect on urban economic resilience in the eastern and central regions, manifested as an inverted U-shaped trend. In the northeastern region, there was only a single threshold effect with globalization as the threshold variable, which still occurred on the left side of the inverted U-shaped curve, while no threshold effect was observed in the western region.
Induced motions on Carroll geometries
Authors: Marsot L 
Published: June 2024

AbstractIn this article, we consider some Carrollian dynamical systems as effective models on null hypersurfaces in a Lorentzian spacetime. We show that we can realize Carroll models from more usual ‘relativistic’ theories. In particular, we show how ambient null geodesics imply the classical ŉo Carroll motion’ and, more interestingly, we find that the ambient model of chiral fermions implies Hall motion on null hypersurfaces, in agreement with previous intrinsic Carroll results. We also show how Wigner–Souriau translations imply (apparent) Carroll motion, and how ambient particles with a non vanishing gyromagnetic ratio cannot have a Carrollian description.
Design optimization and experimental verification of ultrasonic stack for micro hot embossing of polymers
Authors: Abdel-Aleem Ahmed , Fath El-Bab Ahmed M R , Yoshino Masahiko , El-Hofy Hassan A , Hassan Mohsen A 
Published: June 2024

Abstract
Ultrasonic micro hot embossing (UMHE) is a prominent technique used in numerous sectors to produce micro parts since it is cheaper, faster, and more accurate. Amplitude uniformity is a crucial parameter in UMHE in order to manufacture micro parts with accurate dimensions and high-quality surfaces, even though limited research has been conducted on the uniformity of ultrasonic amplitude at the horn face during the embossing process. This paper presents an experimental and numerical study for designing an ultrasonic transducer and horn tailored to the micro hot embossing of polymer micro parts. A finite element (FE) simulation model combined with the Taguchi method has been developed to optimize the horn geometry and maximum amplitude uniformity. The Taguchi orthogonal array of 25 design runs has been generated and simulated using the developed FE modal analysis model, and then the optimized geometry was used to fabricate the horn. Applied torque and operating time calibrate and evaluate the transducer vibration characteristics. Experimental and simulation results revealed that the fabricated ultrasonic transducer and horn of a straight microfeature has a natural frequency of 28.8 kHz and has an 11 µm average peak-to-peak amplitude with 0.963 amplitude homogeneity along the microfeature face. The achieved frequency separation was greater than 0.85 kHz, whereas the gain ratio was 1.2. The design methodology developed in this paper showed great potential and has been numerically validated for various microfeature shapes across the horn face. Consequently, it can be applied to various ultrasonic applications beyond UMHE.
Avoiding lateral mode leakage in thin film lithium niobate waveguides for the generation of spectrally pure photons at telecom wavelengths
Authors: Arora Muskan , Chokkara Pranav , Lugani Jasleen 
Published: June 2024

Abstract
Photonic integrated optical components, notably straight waveguides, serve as pivotal elements for on-chip generation and manipulation of quantum states of light. In this work, we focus on optimizing waveguides based on lithium niobate on insulator (LNOI) to generate photon pairs at telecom wavelengths using spontaneous parametric down-conversion (SPDC). Specifically, we investigate lateral leakage for all possible SPDC processes involving type 0, type I, and type II phase matching conditions in an X-cut lithium niobate waveguide and provide a recipe to avoid leakage loss for the interacting photons. Furthermore, focusing on type II phase matching, we engineer the waveguide in the single-mode regime such that it also satisfies group index matching for generating spectrally pure single photons with high purity (99.33%). We also address fabrication imperfections of the optimized design and find that the spectral purity of the generated photons is robust to fabrication errors. This work offers guidance for the suitable selection of morphological parameters to obtain lossless, single-mode LNOI waveguides for building linear optical circuits and photon pair generation at telecom wavelengths using desired phase-matching conditions.
Ferromagnetic semiconductors in extended lanthanide wires
Authors: Fan Yi-Wei , Zhang Wei , Ge Ni-Na , Li Zhe 
Published: June 2024

Abstract
Exploring one-dimensional (1D) ferromagnetic chains with high magnetic transition temperatures and robust spin polarization is crucial for the development of next-generation spintronic devices. Here, we demonstrate a bottom-up approach to the design and assembly of a 1D ferromagnetic chain based on the magic sandwich cluster Ho2B8. The stability of Ho2B8 is rationalized by the large HOMO-LUMO gap (2.02 eV) and double σ + π aromaticity. Our results show that the 1D linear chain is an attractive ferromagnetic semiconductor with the valence band fully spin-polarized. The long-range ferromagnetic order with a 5 μ
B magnetization on each Ho atom retains up to 86 K, and it features a magnetic transition within a tiny compressive strain (5%). Furthermore, the 1D linear chain exhibits a sizable magnetic anisotropy energy up to 30 meV/atom, indicating a sufficient energy barrier to suppress the spin fluctuations. The present findings suggest that the magnetic lanthanide chain (Ho2B8)
n
is a prospective candidate for next-generation spintronic devices.
Identification of bi-harmonic periodic signal contaminated with Gaussian random noise by analysing high-order PDF moments
Authors: Steinwolf Alexander 
Published: June 2024

Abstract
When a periodic multi-harmonic signal is contaminated by a random noise, the identification of harmonic amplitudes can be performed from the autocorrelation function. However, the latter is not indicative of harmonic phases. Both the amplitudes and the phases can be determined by a time-synchronous averaging procedure, but this requires an accurate knowledge of the multi-harmonic component period obtained from a separate measurement that is not always readily available. Hence, there has been previous research to avoid the necessity of measuring the period and it is the approach followed by this paper. The methodology used is based on the fact that the presence of a periodic component makes the probability density function of the composite signal non-Gaussian. By equalizing the theoretical high-order moments of the composite signal to the corresponding moments calculated for the measured data record, a closed-form solution is derived for the amplitudes and the phases of the bi-harmonic component.
Online testing of extinction method of high-pressure natural gas oil mist based on light extinction
Authors: Lin Guangyao , Hu Fei , Liu Zhen , Ji Zhongli , Wang Deyu , Chen Junxian 
Published: June 2024

Abstract
This paper proposes a theoretical model and scheme for accurately measuring droplet concentration in high-pressure natural gas environments, aiming for precise, online measurement of lubricating oil mist. The model integrates droplet behavior, light extinction properties of the medium, and pressure, using the light extinction method. It applies the Debye Series Expansion of Mie scattering to improve the light extinction coefficient for mediums such as lubricating oil particles. Differential Optical Absorption Spectroscopy is used to calculate the extinction index of natural gas at different pressures. The study innovates by replacing the traditional parallel light path with a non-parallel path that focuses the light beam, countering beam diameter expansion due to gas pressure. Empirical testing shows the method’s accuracy in online oil mist testing under 10 MPa pressure, with less than 5% error compared to offline methods. This work paves the way for future high-pressure gas particle monitoring, particularly in the oil and natural gas sector.
Remaining useful life prediction of mechanical equipment based on time-series auto-correlation decomposition and CNN
Authors: Hu Guolei , Fu Song , Zhong Shisheng , Lin Lin , Liu Yikun , Zhang Sihao , Guo Feng 
Published: June 2024

Abstract
Remaining useful life (RUL) prediction can provide critical information for complex equipment health states (HSs) assessment. Historical long-term HS degradation trends and current short-term HS changes are two key factors affecting RUL prediction. However, most existing deep learning-based RUL prediction methods only consider learning short-term HS change features but ignore learning long-term HS degradation trend features, which limits to improvement of RUL prediction performance. To address this problem, this paper develops a RUL prediction framework based on a combination of time-series auto-correlation decomposition (TSACD) and convolutional neural network (CNN), which can learn both long-term and short-term features of mechanical equipment, so that achieves more robust and accurate RUL prediction. First, a novel TSACD method is proposed to extract historical long-term features from collected long-term monitoring data. The advantage of TSACD is to highlight the true signal by reinforcing periodic features through the Auto-Correlation mechanism and to separate pure trend components using a deep time-series decomposition architecture. Second, the long-term features are mapped to the same space as the short-term HS monitoring data using a group linear layer, which is intended to be aligned and fused with short-term monitoring data. Third, the fused features are fed into a CNN for RUL prediction. Finally, a series of comparison experiments on the C-MAPSS dataset and the XJTU-SY dataset validate the outstanding prognostic performance of the proposed method. The experimental results show that the proposed method outperforms the other RUL prediction methods.
Effect of array arrangement on acoustic levitation performance
Authors: Chen Yiwei , Qiao Boyang , Fan Shuyuan , Jiang Liangxu , Li Xinbo 
Published: June 2024

Abstract
Acoustic levitation manipulation technology holds significant potential for applications in chemistry, biology, medicine, and micro-robotics due to its contact-less, adaptability, and safety advantages. The use of ultrasonic phased array is widespread in acoustic levitation, and the arrangement of the array plays a crucial role in this process. This study investigates the impact of array arrangement on concave and planar arrays. The acoustic levitation performance of concave and planar arrays is analysed with the maximum acoustic radiation force (ARF) and levitation range. The results indicate that concave and planar arrays exhibit similar trends with height in terms of ARF and levitation range and having a maximum value (for concave array, R = 38 mm and H = 67 mm in the z-axis, R = 34 mm and H = 61 mm in the x-axis, and for planar array, H = 66 mm in the long side and H= 55 mm in the short side). However, each array type’s ARF and levitation range variety follow opposite trends, with a maximum value when R = 90 mm and H = 195 mm for concave array and H = 165 mm for planar array. Adjusting the inclination of the array makes it possible to enhance the ARF and expand the control range. Furthermore, the optimal operating region of a concave array is concentrated at the intersection of the spherical axis (R =
H/2 when varying the curvature and height, ϕ = φ when rotavating), while the planar array offers a broader range of manipulation due to its insensitivity to minor variations. This research reveals the influence of array arrangement on ARF and levitation range, providing valuable insights for designing and optimizing acoustic levitation devices.
Differential confocal effective measurement region extraction method based on dual measurement
Authors: Huang Caihong , Yuan Tao , Chen Junpeng 
Published: June 2024

Abstract
Aiming at the problem that the existing differential confocal measurement (DCM) method lacks the ability to decouple the differential signals from over-range the depth data, which in turn leads to measurement errors, this study proposes a differential confocal effective measurement region extraction method based on dual measurement (D-DCM). The first measurement is a double blur depth measurement, which is a coarse measurement, and the initial acquisition of the depth map is realized by applying a known Gaussian kernel blurring to the focal plane image and calculating the edge gradient ratios between the original image and the blurred image. This depth map is used to determine whether the depth of the measured sample in the field of view is within the differential confocal range and to segment it. The second measurement is a DCM, which is a fine measurement. The effective measurement area of the segmented image is second measured with high precision depth measurement. It is shown by single and multiple step heights experiments that the proposed D-DCM method can effectively solve the problem of decoupling the differential signal from the axial depth in differential confocal.
Measurement method of spherical radius size of differential planetary gear tooth surface based on 3D vision
Authors: Zhang Yuewei , Wei Honglei 
Published: June 2024

Abstract
In order to accurately measure the spherical radius dimensions of planetary gear tooth surfaces, we propose a non-contact measurement method based on 3D vision technology. Firstly, the point cloud data of the planetary gear captured by the laser 3D profiler is preprocessed, and the tooth surface point cloud is extracted. Next, based on the structural characteristics of the planetary gear tooth surface, a uniform slicing and sampling algorithm is used to extract circular contour points where the tooth surface point cloud intersects with the slicing planes. These points are then projected onto a two-dimensional plane, where an improved RANSAC algorithm is used to precisely fit each circular cross-section. Contour points associated with significant fitting errors are removed based on a set tolerance value. Finally, an improved differential evolution algorithm is used to perform a three-dimensional spherical fitting on the contour points that meet the tolerance criteria, achieving accurate measurement of the spherical radius of the planetary gear tooth surfaces. Experimental results demonstrate that the repeatability error of the proposed method is ±0.02 mm, with a maximum absolute error of 0.026 mm and an average measurement time of 4.76 s. The method exhibits high robustness and measurement accuracy, meeting practical engineering measurement requirements.