bluuebunny/crossref_metadata_2025_split huggingface dataset:
Reimagining the familiar stranger as a source of security: generating guardianship through everyday mobility
Authors: Zahnow Renee , Corcoran Jonathan 
Published: August 2024

AbstractThe familiar stranger is a social phenomenon that emerges from the serial reproduction of daily routines, structured around urban places and practices, that results in repeated encounters with the same individuals over time. Scholarship suggests that increased familiarity among individuals might incur crime control benefits at places by reducing individual anonymity and enhancing the moral obligation to obey behavioural norms. Familiarity with place-based norms and regularities can also enhance guardianship capacity and willingness to intervene when problems arise. In this paper, we detail a framework that integrates geographical, sociological, and psychological understandings of urban daily life to conceptualize the familiar stranger as a uniquely urban phenomenon emerging from multiple social processes synchronising in time-space. Our framework highlights the capacity for variation in relation to intensity contingent on daily regularities, place attributes, structures and social norms and provides for future measurement, modelling, and monitoring of familiar strangers as a protective factor against crime that can be ascribed to individuals, places and/or social systems. We include an operationalisation of our framework for a single use case, namely familiar stranger encounters in a public transit network.
Made in Frankfurt? The Monetary Policy of the Swiss National Bank Since 1973
Authors: Rathke Alexander , Straumann Tobias 
Published: August 2024

AbstractThe paper investigates the monetary policy of the Swiss National Bank (SNB) in the post-Bretton Woods era, shedding light on the dynamics between the SNB and the Bundesbank and its successor, the European Central Bank, respectively. Our econometric analysis shows a high degree of synchronisation between the SNB’s interest rate changes and the decisions made in Frankfurt. The results also suggest a strong tendency toward direct exchange rate targeting before 1999, which coincides with a period of lower demand shock synchronization. This finding is supported by our analysis of the minutes of the Governing Board of the SNB for the period between 1982 and 1993. The discussions and decisions of the board show that Swiss monetary policy was largely guided by policy rate changes of the Bundesbank. The SNB routinely set the policy rate below the policy rate of the Bundesbank to enforce an implicit exchange rate target.
Individual differences in attention and working memory modulate the process of tone merging: evidence from Macau Cantonese
Authors: Wang Han , Gao Fei , Zhang Jingwei 
Published: August 2024

AbstractCognitive functions, including attention and working memory, have been recognized to be associated with tone processing. However, it remains unclear how these cognitive functions might modulate the process of tone merging. In Macau Cantonese, three pairs of tones are currently undergoing or have completed merging, exhibiting different rates and ranges of merging within the speech community, providing a valuable opportunity to investigate this issue. Through a perception task, a production task, and a series of cognitive function tasks, we examined differences in cognitive performances among individuals distinguishing different tone pairs and explored the correlations between various indices of tone processing and cognitive functions. The results revealed that the completed merging of the T2–T5 pair showed no significant correlation with cognitive functions in perception and production. The T3–T6 pair, with an intermediate merging speed, exhibited a significant positive correlation between cognitive functions and both their perception and production. In contrast, the T4–T6 pair, characterized by a slower merging speed, showed a correlation only in the perception modality. Our findings suggested that cognitive functions affect tones at different stages of the merging process, influencing their perception and production in distinct ways. The results provide a novel perspective on the origin of tonal variation and the relationship between perception and production.
A transferable classical force field to describe glyme based lithium solvate ionic liquids
Authors: Carrillo-Bohórquez Orlando , Kuroda Daniel G. , Kumar Revati 
Published: August 2024

A non-polarizable force field for lithium (Li+) and bis(trifluoromethanesulfonyl)imide (TFSI−) ions solvated in diglyme at around 0.2 mol fraction salt concentration was developed based on ab initio molecular dynamics (AIMD) simulations and a modified polymer consistent force field model. A force–torque matching based scheme, in conjunction with a genetic algorithm, was used to determine the Lennard-Jones (LJ) parameters of the ion–ion and ion–solvent interactions. This force field includes a partial charge scaling factor and a scaling factor for the 1–4 interactions. The resulting force field successfully reproduces the radial distribution function of the AIMD simulations and shows better agreement compared to the unmodified force field. The new force field was then used to simulate salt solutions with glymes of increasing chain lengths and different salt concentrations. The comparison of the MD simulations, using the new force field, with experimental data at different salt concentrations and AIMD simulations on equimolar concentrations of the triglyme system demonstrates the transferability of the force field parameters to longer glymes and higher salt concentrations. Furthermore, the force field appears to reproduce the features of the experimental x-ray structure factors, suggesting accuracy beyond the first solvation shell, for equimolar salt solutions using both triglyme and tetraglyme as the solvent. Overall, the new force field was found to accurately reproduce the molecular descriptions of LiTFSI-glyme systems not only at various salt concentrations but also with glymes of different chain lengths. Thus, the new force field provides a useful and accurate tool to perform in silico studies of this family of systems at the atomistic level.
Dissociation line and driving force for nucleation of the nitrogen hydrate from computer simulation. II. Effect of multiple occupancy
Authors: Torrejón Miguel J. , Algaba Jesús , Blas Felipe J. 
Published: August 2024

In this work, we determine the dissociation line of the nitrogen (N2) hydrate by computer simulation using the TIP4P/Ice model for water and the TraPPE force field for N2. This work is the natural extension of Paper I, in which the dissociation temperature of the N2 hydrate has been obtained at 500, 1000, and 1500 bar [Algaba et al., J. Chem. Phys. 159, 224707 (2023)] using the solubility method and assuming single occupancy. We extend our previous study and determine the dissociation temperature of the N2 hydrate at different pressures, from 500 to 4500 bar, taking into account the single and double occupancy of the N2 molecules in the hydrate structure. We calculate the solubility of N2 in the aqueous solution as a function of temperature when it is in contact with a N2-rich liquid phase and when in contact with the hydrate phase with single and double occupancy via planar interfaces. Both curves intersect at a certain temperature that determines the dissociation temperature at a given pressure. We observe a negligible effect of occupancy on the dissociation temperature. Our findings are in very good agreement with the experimental data taken from the literature. We have also obtained the driving force for the nucleation of the hydrate as a function of temperature and occupancy at several pressures. As in the case of the dissociation line, the effect of occupancy on the driving force for nucleation is negligible. To the best of our knowledge, this is the first time that the effect of the occupancy on the driving force for nucleation of a hydrate that exhibits sII crystallographic structure is studied from computer simulation.
Life cycle assessment of greenhouse gas emissions and carbon mitigation methods in probiotic-fed broiler production
Authors: Chin H. W. , Tee T. P. , Tan N. P. 
Published: August 2024

Context Livestock production contributes significantly to global anthropogenic greenhouse gas emissions. Probiotic-fed broiler production has been shown to reduce greenhouse emissions in other nations significantly, however, outcomes in Malaysia are unknown. Aims This study assesses the total greenhouse emissions of probiotic-fed broiler production from cradle to farm-gate using an accredited Life Cycle Assessment (LCA) tool, Greenhouse Accounting Framework (GAF). It determines the hotspot of greenhouse emissions and emission intensity of the farm in kg CO2-eq/kg liveweight. Three types of mitigation methods, i.e. selling untreated manure, composting, and conversion into biochar, were compared to identify their effectiveness. Methods The research involves three broiler houses with one production cycle. Fifty-four gas samples and 90 poultry litter samples were collected throughout the production cycle and analysed for the targeted gases – i.e. carbon dioxide, methane, nitrogen and volatile solid composition. Analysis results were used to estimate total greenhouse emissions from the farm using the LCA-GAF model. The mitigation efficiency achieved by selling untreated manure, composting, and biochar production is assessed by estimating the carbon stock mass. Key results A new LCA model based on probiotic-fed broiler production was generated, specifically using data obtained from the experiment. The experimental results indicated that energy consumption, i.e. electricity and fuel, have the highest greenhouse emissions (44%), followed by feed production with 40% of the total 53.51 t CO2-eq/house/cycle in the probiotic-fed broiler farm. The emissions intensity of the farm is 1.57 kg CO2-eq/kg liveweight. Estimates of the mitigation efficiency were compared among untreated manure, biochar, and compost. Conclusions Energy consumption, particularly electricity and fuel, contributed the highest greenhouse emissions in the probiotic-fed broiler production. The strategy of selling untreated poultry litter was the most effective carbon mitigation method. However, due to its adverse environmental and human health impacts, converting poultry litter into biochar is the preferable mitigation option. Implications This study is profound for the poultry industry and environmental sustainability. It highlights the crucial role of energy consumption in greenhouse emissions from the probiotic-fed broiler farm, and the necessity of addressing the environmental impacts. Implementing sustainable agricultural practices could lead to more ecological poultry production, contributing to global efforts in climate change mitigation.
A dynamic turbine tip clearance measurement method based on laser self-mixing interferometric ranging considering Doppler effect
Authors: Wu Jun , Chen Yang , Guo Runxia , Chen Jiusheng 
Published: August 2024

Abstract
In view of the Doppler effect caused by rotating blades during dynamic measurement, which reduces the accuracy of tip clearance measurement, a dynamic measurement method of turbine tip clearance based on laser self-mixing interferometric ranging considering the Doppler effect is proposed. Firstly, a self-mixing interference model based on the three-mirror Fabry–Pérot cavity model is proposed. Then, the relationship between distance, frequency, and rotational speed is constructed which lays the foundation for the dynamic measurement of the blade tip clearance. What’s more, the composition of the dynamic self-mixing interferometry system including each experimental measurement parameter is described. Finally, the experimental validation is performed to investigate the relationship between the actual measured distance and frequency after compensating for Doppler shift as well as the accuracy of blade tip clearance measurement. Experimental results demonstrate that as the rotational speed gets faster, greater Doppler frequency shift is generated. Meanwhile, the effect on the accuracy of measurement of blade tip clearance is more obvious. The method considering the influence of Doppler effect effectively improves the reliability and accuracy of the dynamic measurement system of blade tip clearance. The standard deviation of dynamic measurement of blade tip clearance can reach up to 13 μm.
Horizontal rearrangement frequency domain chirplet transform: algorithm and applications
Authors: Xiaofan Huang , Dezun Zhao , Lingli Cui 
Published: August 2024

Abstract
Based on the idea of optimal time–frequency analysis (TFA) theory, a time–frequency post-processing method called horizontal rearrangement frequency domain chirplet transform (HRFCT) is proposed. The proposed method is designed to analyze non-stationary transient signals with nonlinear group delay (GD), aiming at obtaining energy-concentrated and accurate time–frequency representation (TFR). First, based on the image characteristics of the constructed amplitude function, the selection criteria of GD are defined, that is, the local maximum of amplitude function and the local minimum of absolute value of derivative of amplitude function are calculated. Next, according to the calculated GD, the coefficients on the GD trajectory are adaptively extracted, and the coefficients that cause the TFR to be blurred are discarded. Finally, the analysis result of a two-component simulation signal demonstrates the satisfactory performance of the HRFCT, and compared with four advanced TFA methods, the competitiveness of the HRFCT is verified. Additionally, the application of the HRFCT in the processing of constant and variable speed bearing signals highlights its prospects in transient signal analysis and rotating machinery condition monitoring.
Effect of UEVC parameters on cutting surface quality and subsurface damage of single crystal γ-TiAl alloy via atomic simulation
Authors: Chen Yuncui , Zhou Baocheng , Zhu Huibin , Li Haiyan , Feng Ruicheng , Cao Hui , Lei Chunli 
Published: August 2024

Abstract
TiAl alloys are favored by the aerospace industry due to its excellent mechanical properties. However, its intrinsic brittleness, the use of conventional cutting (CC) process leads to the problems of high cutting force and high cutting temperature, which in turn affects the machined surface quality. Ultrasonic elliptical vibratory cutting (UEVC) has been proved to be an effective method to improve the surface quality and reduce the subsurface damage of difficult-to-machine materials. This paper compares the effects of CC and UEVC processes on cutting forces and subsurface damage based on molecular dynamics simulation methods, and the effects of elliptical vibration frequencies and amplitude ratios (AR) on surface morphology, roughness, and subsurface damage are investigated. The results show that the cutting force and subsurface damage in the UEVC process are reduced compared with that in the CC. Due to the vibration frequency, the subsurface damage is mainly dominated by atomic clusters, and both surface and subsurface masses show an optimization trend as the vibration frequency decreases. In terms of the AR, the surface quality is better at an AR of 2/3, with less activation of immovable dislocations, and the degree of subsurface damage decreases as the AR increases, and a relatively stable defective structure emerges when the AR is 1/2. The simulation results facilitate an atomic-scale comprehension of the removal mechanism of UEVC and further provide a theoretical foundation for the surface mass and subsurface damage mechanism and optimization of vibrational parameters of UEVC single crystal γ-TiAl alloy.
Stability of viscous contact wave for the full compressible Navier–Stokes–Korteweg equations with large perturbation
Authors: Dong Wenchao 
Published: August 2024

Abstract
This study focuses on the stability of the viscous contact wave for the one-dimensional full Navier–Stokes–Korteweg equations with density-temperature dependent transport coefficients and large perturbation. Our findings demonstrate a Nishida–Smoller type result, indicating that the solution remains stable under large perturbation as long as

γ
−
1

is sufficiently small. Notably, the smallness of the capillary coefficient is unnecessary. We then employ the initial layer analysis technique to investigate the asymptotic behaviour in the

W

k
,
p

norm. We show that the capillary term has a smoothing effect, which implies that the strong solution is indeed a smooth one. Our results represent an improvement over those previously reported in Chen and Sheng (2019 Nonlinearity
32 395–444). Furthermore, by applying the method in this study to the isothermal case, we can achieve a better outcome than Germain and LeFloch (2016 Commun. Pure Appl. Math.
69 3–61).
Machine learning aided line intensity ratio method for helium–hydrogen mixed recombining plasmas
Authors: Kajita Shin , Nishijima Daisuke , Fujii Keisuke , Tanaka Hirohiko , Vernimmen Jordy , van der Meiden Hennie , Classen Ivo , Ohno Noriyasu 
Published: August 2024

Abstract
The helium line intensity ratio (LIR) with the help of a collisional radiative (CR) model has long been used to measure the electron density,

n
e

, and temperature,

T
e

, and its potential and limitations for fusion applications have been discussed. However, it has been reported that the CR model approach leads to deviations in helium–hydrogen mixed plasmas and/or recombining plasmas. In this study, a machine learning (ML) aided LIR method is used to measure

n
e

and

T
e

from spectroscopic data of helium–hydrogen mixed recombining plasmas in the divertor simulator Magnum-PSI. To analyze mixed plasmas, which have more complex spectral shapes, the spectroscopy data were used directly for training instead of separating the intensities of each line. It is shown that the ML approach can provide a robust and simpler analysis method to deduce

n
e

and

T
e

from the visible emissions in helium–hydrogen mixed plasmas.
Modeling of an electro-active pseudo-trilayer based on PEDOT, a semi-conductor polymer
Authors: Tixier M , Pouget J 
Published: August 2024

Abstract
Electroactive polymers are smart materials that can be used as actuators, sensors, or energy harvesters. We focus on a pseudo trilayer based on PEDOT, a semiconductor polymer: the central part consists of two interpenetrating polymers and PEDOT is polymerized on each side; the whole blade is saturated with an ionic liquid. A pseudo trilayer is obtained, the two outer layers acting as electrodes. When an electric field is applied, the cations move towards the negative electrode, making it swell, while the volume decreases on the opposite side; this results in the bending of the strip. Conversely, the film deflection generates an electric potential difference between the electrodes. We model this system and establish its constitutive relations using the thermodynamics of irreversible processes; we obtain a Kelvin–Voigt stress–strain relation and generalized Fourier’s and Darcy’s laws. We validate our model in the static case: we apply the latter to a cantilever blade subject to a continuous potential electric difference at the constant temperature. We draw the profiles of the different quantities and evaluate the tip displacement and the blocking force. Our results agree with the experimental data published in the literature.
Elastic-plastic conductor damage evaluation at over 0.4% strain using a high-stress REBCO coil
Authors: Bang Jeseok , Bradford Griffin , Kim Kwangmin , Lee Jonathan , Polyanskii Anatolii , Larbalestier David 
Published: August 2024

Abstract
Recent reports on screening current stress simulations of high-field REBCO magnets frequently present peak stresses over 1 GPa. However, this result is probably an unrealistic artifact of purely elastic calculations, considering the macroscopic yield and fracture stresses of approximately 900 MPa and less than 1.1 GPa for Hastelloy substrate-coated conductors. Here, we evaluate elastic-plastic conductor damage at over 0.4% strain using a high-stress REBCO coil exposed to a high field to explore this elastic-plastic regime. The coil was located off-center in a low-temperature superconductor magnet so as to induce a significant screening current in the enhanced radial field. Voltage taps, a Hall sensor, and two strain gauges were used for the instrumentation. We obtained strains exceeding 0.4% near the outward edge during the coil current charge from 350 A to 390 A, where the coil was exposed to external axial and radial magnetic fields of 13 T and 0.5 T. Post mortem results showed wavy plastic deformation, electrical damage, and REBCO defects. An elastic-plastic simulation reproduced the measured strains and predicted that ∼1 GPa stress is sufficient to induce ∼0.9% strain, thus validating our initial concerns with purely elastic models. This paper provides our experimental and simulation results.
Thermal degradation analysis and optimization of controlled heat treatment for stacked high temperature superconducting tapes
Authors: Yang Shige , Tang Bohan , Yue Zhilai , Yu Hui , Xie Bowen , Li Sicheng , Chen Yanquan , Niu Rui , Zhao Jun , Zhou Peng , Chen Wenge , Jiang Shili , Jiang Donghui , Kuang Guangli 
Published: August 2024

Abstract
High temperature superconducting (HTS) tapes have crucial applications for generating high magnetic fields with minimal power input. Given a single tape has a limited current-carrying capacity, stacked tapes are common, fabricated through methods like solder soldering or epoxy impregnation requiring heat treatment. In this work, we have investigated the efficient region for vacuum heat treatment applicable of commercial HTS tapes, analysed the thermal degradation principles and accordingly proposed a controlled heat treatment process for stacked HTS tapes to achieve more precise regulation of the critical current (

I

c

). This heat treatment process was explored using a specialized multi-temperature zone vacuum system. Critical parameters in this process include heat treatment temperature, duration and pressure on the tape. A series of experiments were conducted at 77 K in a self-field to investigate how these parameters affect the superconductivity performance of stacked HTS tapes. Based on the experimental results, an optimal heat treatment process has been proposed. Under the current process, with the heat treatment temperature set at 200 °C, duration at 20 min, and pressure on the tape at 12 MPa, the samples exhibit favourable properties characterized by a smooth and neat appearance without defects such as pinholes or false soldering, and the superconductivity performance can be consistently maintained at more than 97%. The obtained measurements were compared with simulated results, demonstrating an error margin within 0.5%. Moreover, precise control of

I

c

is achieved, tailored to tape and stacking specifications, allowing manageable degradation as required. This heat treatment process for stacked HTS tapes holds significant importance, especially in the context of designing cable-in-conduit conductors fabricated with stacked HTS tapes. It serves as a valuable reference for further advancements in this field.
Molybdenum low-resistance thin-film resistors for cryogenic devices
Authors: Korneeva Yu P , Dryazgov M A , Porokhov N V , Osipov N N , Krasilnikov M I , Korneev A A , Tarkhov M A 
Published: August 2024

Abstract
We present a study of thin-film Mo resistors for NbN electronics operating at cryogenic temperatures. The key step is the 0.5–1.5 keV ion cleaning–activation of NbN before Mo deposition, which allows us to obtain a high-quality Mo/NbN interface. This, together with an additional Al bandage layer in the area of the contact pads, allows us to reduce the contact resistance below 1 Ω. The quality of the interfaces is confirmed by transmission electron microscopy and x-ray reflectometry.