bluuebunny/crossref_metadata_2025 huggingface dataset:
Urban Land Value Estimation Model based on Income Capitalization Method
Authors: Sugito Nanin Trianawati , Affriani Asri Ria , Ramadhani Anisa Nabila Rizki
Published: November 2024

Land valuation is a critical component of the cadastral system, closely linked to land use and management. The value of land is typically assessed based on the benefits it offers. The high land prices often observed in urban areas result from increased demand, whereas the availability of land remains fixed. Several methods can be employed for land valuation, including the market comparison method, the income capitalization method, and the cost method. This study focuses on the income capitalization approach for determining land value. According to this method, higher income generated from a property leads to a higher property value. For residential properties, income is derived from net rent, calculated as rental income minus operational expenses, using the income approach. This research employs geostatistical analysis to model land values. The mathematical model developed through geostatistical analysis aims to represent actual land values accurately and facilitate the establishment of land value zones.
Land capitalization model for sustainable tourism based on PLS-SEM
Authors: Sukriah Erry
Published: November 2024

Tourism development faces problems related to land capitalization. Without an adequate solution, this problem threatens sustainable tourism development strategies in Indonesia. This research aims to develop a land capitalization model for tourism development in Lembang, West Java. This model was prepared using the Partial Least Squares and Structural Equation Modeling (PLS-SEM) method involving various physical, environmental, and socio-economic factors. This research shows that the capitalization model could describe actual conditions, although the relationship between latent variables was weak. There are three patterns of land capitalization for tourism, where investors 1) invest in land and immediately convert it into a tourism business, then the prices increase sharply, 2) invest in land and then change the use into a tourism business accompanied by control of the surrounding and then the price increases, and 3) invest gradually with acquiring land until they create exclusive areas and increase the price. To control land capitalization in tourism areas, land ownership regulations are needed to protect ownership for local communities.
The investigative trends on peri-urban area viewed geographic perspective and issue: A bibliometric study
Authors: Singkawijaya Elgar Balasa , Nandi Nandi
Published: November 2024

The peri-urban area represents a transitional zone between rural and urban landscapes, characterized by a mix of village-like and city-like features in physical form, social activities, and development patterns. This article provides an overview of peri-urban landscapes from a geographic perspective, based on a bibliometric analysis of research published from 2000 to 2023. Using data from the Scopus database, the study analyzed 118 publications with 3,464 citations, identifying 2014 as the peak year with 14 publications. The United States emerged as the most influential country, contributing 26 publications and maintaining 20 international collaborations. The research highlights that peri-urban areas are dynamic spaces influenced by geographic perspectives on study areas, models, scales, landscapes, development, and transformation processes. These areas are marked by social, economic, environmental, and spatial diversity. The study emphasizes the importance of geospatial technologies in exploring sustainable development strategies and calls for an interdisciplinary approach to address global challenges such as economic growth, land use changes, and urban planning in peri-urban regions.
Migrant settlement distribution in urban centers of megacities Jakarta
Authors: Nandi Nandi
Published: November 2024

Rapid movement of people and goods has been a remarkable distinction of Jakarta. Apart from being seen as center of development, Jakarta has also been perceived to seek better life and find new opportunities. This cultural phenomenon attracts people from various locations and socioeconomic backgrounds to settle, both permanently or temporarily. The presence of migrants in Jakarta plays an important role toward social and economic aspects. This research discusses; (1) migrant settlement distribution, (2) migrant settlement and its relation to development in urban centers, and (3) socio-economic. To analyze the in-migration phenomenon, this research used Crude In-Migration Rate and on analyzing the distribution of migrant settlements from the urban cores, buffer analysis was implemented. The result of this research shows that migrant settlement in Jakarta does not concentrate on the urban cores or even does not show any possible spread direction toward the core. The dominant migrant settlement and areas with most migrants showed in the southern part of Jakarta Province as it directly connected with South Tangerang City, Depok City, and Bekasi City. Dominant migrant settlement in the west also indicates better transportation and network infrastructure, similar economic activities, and growing livelihood opportunities in southern part of Jakarta.
The Map Media Development of Changes to the Musi River Border in Palembang
Authors: Murjainah  , Setianto Heri , Mujib Muhammad Asyroful
Published: November 2024

This study aims to produce a map of the Musi River border changes in Palembang which is worthy of learning geography in hydrology courses. The method used in this research is a development research method by adopting the Alessi and Trolip development model which consists of planning, design, and development stages. The data collection techniques used in this study were interviews, questionnaires, and documentation. Data analysis using qualitative descriptive analysis techniques. Based on the results of the analysis of the map of the development of the media for changing the boundaries of the Musi Palembang river, it shows that the product developed is very worthy for learning after going through the alpha test, both the analysis results of the validator from media experts and material experts. Meanwhile, the beta test phase and product field trials are worthy to use for students of geography education.
Assessment of food provider ecosystem services as food security in modern industrial estate planning at Muaro Jambi Regency
Authors: Hindayani Purna , Pratama Armandha Redo
Published: November 2024

This research aims to determine the food carrying capacity and environmental suitability of Kemingking Dalam Village in Muaro Jambi Regency for maintaining food security amidst planned modern industrial developments. Designated as a strategic national area, this village is set to become the first modern industrial zone in Jambi Province. The study employed Geospatial Information System (GIS) methods to assess and map food carrying capacity, particularly focusing on rice production. Findings indicate that the area is currently capable of meeting its food needs.The food provision ecosystem services were categorized into five levels, from very low to very high. The study revealed that 71% (1,874.32 hectares) of the village falls under the “very high” category for food provision. However, a significant portion of the planned industrial area, about 995 hectares or 68.47% of the total, overlaps with these high to very high food provision zones.The policy implication is that areas that have the high-very high category in providing food are not recommended to become modern industrial areas in order to maintain food security.
A nonlocal traffic flow model with stochastic velocity
Authors: Böhme Timo , Göttlich Simone , Neuenkirch Andreas
Published: November 2024

In this paper, we investigate a nonlocal traffic flow model based on a scalar conservation law, where a stochastic velocity function is assumed. In addition to the modeling, theoretical properties of the stochastic nonlocal model are provided, also addressing the question of well-posedness. A detailed numerical analysis offers insights how the stochasticity affects the evolution of densities. Finally, numerical examples illustrate the mean behavior of solutions and the influence of parameters for a large number of realizations.
Feasibility of newly designed rotatable sphincterotome for endoscopic sphincterotomy (with video)
Authors: Hori Yasuki , Hayashi Kazuki , Naitoh Itaru , Okumura Fumihiro , Anbe Kaiki , Miyabe Katsuyuki , Hirano Atsuyuki , Takada Hiroki , Jinno Naruomi , Yoshida Michihiro , Kato Akihisa , Kachi Kenta , Sahashi Hidenori , Adachi Akihisa , Toyohara Tadashi , Kuno Kayoko , Kito Yusuke , Kataoka Hiromi
Published: November 2024

Background and study aims Endoscopic sphincterotomy can be challenging especially in patients with surgically altered anatomy. Although a rotatable sphincterotome (r-sphincterotome) may be useful, its rotational function is often inadequate. We evaluated the feasibility of a newly designed r-sphincterotome equipped with a well-conceived cutting wire.

Methods We measured the movement and dynamics of both the newly designed r-sphincterotome and two existing r-sphincterotomes using in-house equipment. Ideally, the rotational force exerted at the proximal end should transmit directly to the distal end. But it is often challenging, particularly within the constraints of a bent endoscope and working channel. We collected data regarding deviation from the ideal value 10 times for each sphincterotome.

Results The deviation from the ideal value was significantly lower with the newly designed r-sphincterotome than with the conventional r-sphincterotomes (44.9 ± 27.8 vs. 73.7 ± 44.6 and 130.1 ± 71.4 degrees, respectively; P < 0.001). The newly designed r-sphincterotome rotated smoothly and consistently at a constant speed, mirroring the input rotation.

Conclusions We evaluated the feasibility of the newly designed r-sphincterotome using an experimental model. We believe that the findings from these experiments may contribute to easier and more precise sphincterotomies.
Dye-based chromoendoscopy versus i-scan virtual chromoendoscopy in long-standing ulcerative colitis: Multicenter prospective RCT
Authors: Jans Alexander , Sinonquel Pieter , Seerden Tom C.J. , De Bodelier Alexander , de Ridder Rogier , Pierik Marieke J , Karstensen John Gásdal , Sloth Stine , De Hertogh Gert , Demedts Ingrid , Willekens Hilde , Vermeire Severine , Bisschops Raf
Published: November 2024

Background and study aims Long-standing ulcerative colitis (UC) is associated with an increased risk of developing colorectal neoplasia. Both dye-based chromoendoscopy (DCE) and virtual chromoendoscopy (VCE) increase detection of neoplastic lesions. In this prospective randomized controlled trial (RCT), we compared the neoplasia detection rate between DCE and i-scan VCE in patients with long-standing UC.

Patient and methods In four European hospitals, 131 patients with long-standing UC (disease duration > 8 years) were randomized to either DCE with methylene blue 0.1% (n = 66) or i-scan VCE (n = 65). All procedures were performed by trained endoscopists. Biopsies were taken from all visible lesions and the surrounding mucosa.

Results The mean number of neoplastic lesions detected per colonoscopy was not significantly different between DCE (0.27) and i-scan VCE (0.37) (P = 0.41). Similarly, there was no significant difference in neoplasia detection rate between DCE (19.7%) and VCE (27.7%) (odds ratio0.64, 95% confidence interval 0.28–1.50, P = 0.31). However, the per lesion neoplasia detection rate was significantly higher with i-scan VCE compared to DCE (27.6% vs 15.3%, P = 0.036). Both withdrawal and total procedure time were on average 10.0 and 9.9 minutes shorter using i-scan VCE (both P < 0.001).

Conclusions This multicenter, prospective RCT showed no significant difference in neoplasia detection between DCE and i-scan VCE in long-standing UC. However, use of i-scan VCE was associated with a lower false-positive rate and a significantly shorter procedure time compared with DCE. I-scan VCE, therefore, could be a valid replacement for DCE in UC surveillance colonoscopies.
Ethical Issues and the Role of Palliative Care for Patients with Aspiration Pneumonia
Authors: Rosen Amanda , Hayward Bradley
Published: November 2024

Aspiration pneumonia is a clinical entity with important ethical considerations. It is imperative for clinicians to understand these considerations to best provide counsel to patients and their families, allowing them to make fully informed decisions. Given that aspiration pneumonia is frequently associated with end of life, there are palliative medicine principles that may help in the treatment of this disease.
Protests on Campus: The Political Economy of Universities and Social Movements
Authors: Kaur Harnoor , Yuchtman Noam
Published: November 2024

In the 2023–24 academic year, protests swept across US university campuses, then campuses in Britain and elsewhere, demanding a ceasefire in the Israeli–Hamas conflict and specific university administrative responses to the conflict. This paper puts this recent wave of protests into historical perspective. It first argues that the university must be understood not only as an economic institution that produces human capital, but also as a political institution that produces a society’s elites. As such, a fundamental institutional role is to endow entering cohorts of elites with an “ideological bundle”, which is also, at times, contested in the university environment. We present new patterns of such contestation, collecting information from multiple sources on protests involving university students across time and space. We argue that the current wave of ceasefire protests is best understood as a demand by young elites to modify the elite ideological bundle. Historical evidence suggests that such modifications have regularly been made following campus protests.
Code green: ethical leadership’s role in reconciling AI-induced job insecurity with pro-environmental behavior in the digital workplace
Authors: Kim Byung-Jik , Kim Min-Jik , Lee Julak
Published: November 2024

The current research investigates the complex interplay between artificial intelligence (AI)-induced job insecurity, psychological contract breach (PCB), pro-environmental behavior at work (PEBW), and ethical leadership in the context of organizational sustainability. As AI technologies increasingly permeate the workplace, understanding their impact on employee attitudes and behaviors becomes crucial for maintaining organizational effectiveness and environmental responsibility. Drawing on several theories, we developed and tested a moderated mediation model using a three-wave time-lagged design with 391 employees from various South Korean corporations. Our findings reveal that AI-induced job insecurity does not directly affect PEBW, but rather operates through the mediating mechanism of PCB. Specifically, AI-induced job insecurity positively influences PCB, which in turn negatively affects PEBW. Moreover, ethical leadership emerges as a significant moderator, mitigating the positive association between AI-induced job insecurity and PCB. This study uniquely contributes to the literature by integrating AI-induced job insecurity into the organizational sustainability framework, offering novel insights into how technological advancements influence employee pro-environmental behaviors. Our findings extend the understanding of the Context-Attitudes-Behavior framework in the digital age, bridging the gap between technological disruption literature and environmental sustainability research. These results provide practical implications for organizations striving to balance technological innovation with employee well-being and environmental responsibility, offering strategies for maintaining pro-environmental behaviors amidst AI-induced uncertainties. This paper contributes to the growing literature on AI at work and offers insights for organizations navigating the challenges of technological advancement while promoting environmental sustainability.
Anisotropic scattering in degenerate semimetals at low temperatures
Authors: Vinnik V. S. , Okhrem E. A. , Samoilovich A. G.
Published: November 2024

The anisotropy of the electrical conductivity of degenerate semi-metals whose carriers possess an anisotropic energy spectrum, is investigated at low temperatures. It is shown that because of the anisotropy in the effective masses a linear law of the temperature dependence of the resistivity is satisfied for very much lower temperatures than in the case of carriers with an isotropic mass. The anisotropy in the electrical conductivity decreases with the lowering of the temperature.
Radiation interaction of a system of two Josephson junctions
Authors: Krech W. , Grosse H.-H.
Published: November 2024

Starting from the fundamental equations describing the interaction of a system consisting of two Josephson junctions with a single cavity mode, the creation of the coherent state is discussed in the framework of the adiabatic approximation. The condition of synchronization is given. Essentially, it expresses the relation between, on the one hand, the coupling intensity of the Josephson radiator and the Maxwellian field and, on the other, the separation between applied Josephson frequencies and the resonator damping.
Angular dependence of the probability of specular reflection of conduction electrons from the (110) face of tungsten
Authors: Mitryaev A. A.
Published: November 2024

The resistivity ρ of thin tungsten and molybdenum single-crystal plates has been studied at low temperatures (4.2–60 °K). It is found that the interaction of conduction electrons with the metal boundaries is important in determining ρd(T) when the size effect is significant. The experimental data are used to evaluate the probability of specular reflection of electrons at the surface as a function of angle of incidence.
Impurity spin state in anisotropic antiferromagnets. I. One-impurity approximation
Authors: Loktev V. M. , Pogorelov Yu. G.
Published: November 2024

The spectrum of an antiferromagnetic dielectric with an impurity in a magnetic field parallel to the matrix “easy axis” is analyzed in the example of CoF2 with a small Mn2+ ion concentration. It is shown that one-ion anisotropy results in a specific resonance interaction between the spin and impurity vibration branches, whereupon the intensity of impurity absorption is magnified considerably.
Low-temperature resistivity maxima in dilute Cu–Co–Fe alloys
Authors: Beilin V. M. , Cherenkov V. A.
Published: November 2024

The electrical resistivity of Cu–Co–Fe and Cu–Co Kondo alloys was measured in the temperature range from 4.2 to 77.3 °K. The resistivity displayed low-temperature maxima characteristic of alloys which are both Kondo alloys and “spin glasses.” Intense deformation and aging of Cu–Co–Fe alloys entailed changes in the ρ(T) anomalies which may be due to impurity-impurity interactions of the Ruderman-Kittel-Kasuya-Yosida type.
Quantum oscillations of the thermodynamic characteristics of a pressurized metal with dislocations
Authors: Natsik V. D. , Potemina L. G.
Published: November 2024

It is shown that observation of oscillations in the thermodynamic characteristics accompanying a smooth change in pressure is possible in metals having a special type of electron spectrum in the presence of dislocations. The oscillations are due to the electron states localized near the dislocations. The oscillating part of the specific heat is evaluated and analyzed. At sufficiently low temperatures the amplitude of the specific heat oscillations can exceed the magnitude of its smooth part in a dislocation-free metal.
Acoustic modes in a superleak waveguide filled with a superfluid He3–He4 mixture
Authors: Karchava T. A. , Kekutiya Sh. E. , Sanikidze D. G.
Published: November 2024

Wave propagation in a superleak waveguide completely filled with a superfluid He3–He4 mixture is investigated under conditions of partial damping of the normal component of the fluid. The propagation velocities and absorption coefficients are calculated for the first and second modes, and their dependence on the He3 concentration is determined. Relations are derived between the pressure, temperature, and concentration amplitudes in the different waves.
Shape of electron–hole drops in a magnetic field
Authors: Bychkov Yu. A. , lordanskii S. V.
Published: November 2024

The shape of an electron–hole drop in a constant external magnetic field is analyzed with the aid of the macroscopic MHD equations. The extreme cases of very high and very low electrical conductivity are considered. The boundary conditions at the vapor-liquid interface are taken into account systematically here, for the purpose of determining the shape. It is demonstrated that a drop in a given magnetic field can, depending on the parameters, become either oblate or prolate.
Flux jumps and oscillations in type-II superconductors
Authors: Maksimov I. L , Mints R. G.
Published: November 2024

Finite thermomagnetic instabilities are studied in the critical state of type-II superconductors under various heat input conditions. A thin plane-parallel plate in an external magnetic field parallel to the plate surface is considered. A study is made of how the contact of the superconductor with a normal metal influences the effect. Finally, we find the conditions under which a series of successive finite magnetic-flux jumps, i.e., oscillations of the electromagnetic field and temperature, can be observed in the specimen and we estimate their number and period.
Relaxation mechanisms in n-lnSb under conditions of electron heating in a quantizing magnetic field
Authors: Zlobin A. M. , Kalitenko N. G. , Kichigin D. A. , Mironov O. A.
Published: November 2024

The critical electric field Ecr and current Icr corresponding to the knee of the current-voltage characteristic of n-InSb are investigated at helium temperatures as functions of temperature and magnetic field intensity. The knee is ascribed to instability of the electron system to heating. If the phonon system is in equilibrium, the critical field Ecr is independent of carrier density and depends only on the product of the carrier momentum relaxation rate vi and the electron-phonon relaxation rate vep:Ecr∼[vi(T,H)vep·(T,H)1/2. The critical current Icr is determined by the carrier density and by the ratio [vep/vi]1’2. These relationships are used to determine, from experimental plots of Icr(H), and Ecr(H), the relaxation rates corresponding to electron energy and momentum dissipation. It is concluded that deformation-potential scattering makes an important contribution to energy relaxation at 4.2°K. The observed decrease in the slope of the plots of Ecr(H) with increasing H is explained by the vanishing of the thermal phonon reservoir in strong magnetic fields.
Electronic spectrum of quasi-one-dimensional Fermi systems with diagonal and off-diagonal disorder
Authors: Golub A. A. , Chumakov Yu. M.
Published: November 2024

The electronic density of states of quasi-one-dimensional structures with impurities and defects is calculated by generalizing the method developed by Abrikosov and Ryzhkin. A quasi-one-dimensional model with Peierls instabilities is investigated. For this case we consider the limit of complete incommensurability of periods of the superlattice and of the host lattice, as well as the limit of a half-filled band.
Vibrational spectrum modification for crystals with long-range impurity states
Authors: Ivanov M. A. , Pogorelov Yu. G.
Published: November 2024

The phonon spectrum of a crystal with impurities is considered, taking into account both mass defects and changes in force constants. It is shown that in a system with large-radius impurity states a characteristic low impurity concentration exists at which the spectrum is significantly modified in the frequency region of impurity oscillations. Two types of rearrangement are possible, coherent and incoherent. For low-frequency quasilocal vibrations the redistribution is always coherent, accompanied by cross splitting of the spectrum. For impurity levels near the edge of the optic band (or the top of the acoustic band) both types of redistribution can be observed, depending on the relations between the perturbation parameters. It is shown that for low concentrations new impurity bands characterized by quasimomentum can be generated if the impurity atoms are weakly bound and sufficiently light. The effect of coherent redistribution on the nature of optical spectra of impurity states is discussed.
Superconductivity of small lanthanum particles
Authors: Morozov Yu. G.
Published: November 2024

Superconductivity is studied in a structure formed of lanthanum particles 10–90 nm in radius. The presence of two crystalline phases existing in massive lanthanum specimens is determined. The critical temperature for particle transition into the superconductive state correlates with a change in phase composition. Magnetic field penetration depth for the small lanthanum particles is evaluated.
Qualitative research on language learning strategies and self-regulation
Authors: Thomas Nathan , Schneider Jason , Zhou Sihan
Published: November 2024

Scholarship on language learning strategies has evolved from small-scale, practitioner-oriented studies to
predominantly large-scale, questionnaire-driven research. This general shift has been instrumental in contributing to the field’s
increased popularity. Robust quantitative studies are valuable. However, many scholars have called for more qualitative research
to understand learners’ strategic behaviors in greater depth. Similarly, research on self-regulated learning can also benefit from
qualitative inquiry. While self-regulated learning was once considered a replacement for language learning strategies, it is now
commonly researched as a complementary construct within the same domain. As such, this special issue showcases recent qualitative
studies that explore the complex “why” and “how” of language learning strategies and self-regulated learning. Originating from a
symposium at the 2023 AILA World Congress, this collection brings together a range of methodologies, illustrating diversity within
qualitative approaches and providing empirical insights that advance both theory and practice. In this introduction, we explain
our rationale for proposing this special issue, discuss key issues it addresses, and conclude by providing future directions for
research.
Linearized boundary control method for density reconstruction in acoustic wave equations
Authors: Oksanen Lauri , Yang Tianyu , Yang Yang
Published: November 2024

We develop a linearized boundary control method for the inverse boundary value problem of determining a density in the acoustic wave equation. The objective is to reconstruct an unknown perturbation in a known background density from the linearized Neumann-to-Dirichlet map. A key ingredient in the derivation is a linearized Blagoves̆c̆enskiĭ’s identity with a free parameter. When the linearization is at a constant background density, we derive two reconstructive algorithms with stability estimates based on the boundary control method. When the linearization is at a non-constant background density, we establish an increasing stability estimate for the recovery of the density perturbation. The proposed reconstruction algorithms are implemented and validated with several numerical experiments to demonstrate the feasibility.
Role of thermal and electric fields in the failure mechanism of metallized film capacitors: insights from molecular chain dynamics within polymer dielectrics
Authors: Zhang Jie , Wang Feipeng , Zhou Jian , Zhang Zhicheng , Li Jian , Chen Weigen
Published: November 2024

The seamless integration of modern power systems and renewable energy sources heavily relies on advanced power electronics technologies, with metallized film capacitors (MFCs) playing a pivotal role in this ecosystem. Ensuring the operational efficiency and safety of these systems necessitates a thorough understanding of MFC failure mechanisms. In this study, molecular dynamics and density functional theory are employed to analyze the microscopic parameters governing MFC failure characteristics across a temperature spectrum of 25 °C–105 °C. The investigation is geared toward theoretically assessing MFC failure mechanisms under varying voltage ramp rates. Our findings highlight temperature as the primary influencer of failure characteristics at slower ramp rates (50 and 75 V s−1), where the interplay between carrier transport and intermolecular interaction energy dictates the trend of capacitor failure voltage—a pattern of initial increase followed by decrease with temperature. Conversely, higher voltage ramp rates accentuate the significance of the electric field. At a rapid ramp rate of 900 V s−1, the dominance of the electric field mitigates the impact of temperature, resulting in minimal variation in failure voltage across temperatures. Moreover, under intense electric fields, the reduction in free volume within the polypropylene unit exhibits a rapid decline, significantly constraining the mobility of molecular chains. Consequently, certain segments of these molecular chains exhibit localized alignment and directional movement. The rise in molecular polarity and reduction in energy gap contribute to substantially lower failure voltages compared to slower ramp rates. This study offers robust theoretical insights into comprehending MFC failure characteristics, thereby ensuring their reliable operation in demanding environments.
Why hyperdensity functionals describe any equilibrium observable
Authors: Sammüller Florian , Schmidt Matthias
Published: November 2024

We give an introductory account of the recent hyperdensity functional theory for the equilibrium statistical mechanics of soft matter systems (Sammüller et al 2024 Phys. Rev. Lett.
133 098201). Hyperdensity functionals give access to the behaviour of arbitrary thermal observables in spatially inhomogeneous equilibrium many-body systems. The approach is based on classical density functional theory applied to an extended ensemble using standard functional techniques. The associated formally exact generalized Mermin-Evans functional relationships can be represented accurately by neural functionals. These neural networks are trained via simulation-based supervised machine learning and they allow one to carry out efficient functional calculus using automatic differentiation and numerical functional line integration. Exact sum rules, including hard wall contact theorems and hyperfluctuation Ornstein–Zernike equations, interrelate the different correlation functions. We lay out close connections to hyperforce correlation sum rules (Robitschko et al 2024 Commun. Phys.
7 103) that arise from statistical mechanical gauge invariance (Müller et al 2024 Phys. Rev. Lett.
133 217101). Further quantitative measures of collective self-organization are provided by hyperdirect correlation functionals and spatially resolved hyperfluctuation profiles. The theory facilitates to gain deep insight into the inherent structuring mechanisms that govern the behaviour of both simple and complex order parameters in coupled many-body systems.
Intensity-varied interferometric autocorrelations for characterisations of optical nonlinearity
Authors: Jenne Matthias F , Holzman Jonathan F
Published: November 2024

In this work, we present the theoretical framework and experimental setup for intensity-varied interferometric autocorrelations. This is done to resolve the manifestations of multiphoton absorption and saturation, while avoiding the complexities of analogous techniques. Our system is demonstrated with the standardised wavelength of 1550 nm, at the centre of the optical communication band, and a conventional silicon photodiode, whose bandstructure allows for multiple pathways for multiphoton absorption. With this system, we see the silicon exhibit negligible one-photon absorption, strong two-photon absorption for intensities up to 160 GW cm−2, strong three-photon absorption for intensities between 160 and 350 GW cm−2, and saturation for intensities above 350 GW cm−2. Ultimately, such results suggest that the proposed theoretical framework and experimental setup are effective tools for nonlinear characterisations of multiphoton absorption and saturation.
Local damage-sensing method for structural members based on stress correlation characteristics
Authors: Lu Wei , Cui Yan , Tan Xinyi , Teng Jun , Hu Weihua
Published: November 2024

Structures are subjected to various external factors during the service life, the structure may have potential safety hazards caused by local damage. In order to accurately perceive the structural safety and identify issues in real-time, it is essential to develop local damage-sensing method for structural members using monitoring data. Therefore, this study proposes a local damage-sensing method for structural components based on stress correlation characteristics. This method relies on stress monitoring data, takes temperature influence into account, and achieves high accuracy in identifying local damage sensitivity. First, a strain response expression method is proposed based on the unit impulse response function and the external excitation function. The strain correlation function for any two measurement points on the structure is derived, and the correlation function between the strain at the measurement point and the strain at a reference point is calculated. The correlation function magnitude vector is constructed from its absolute values, and a component-state perception index is proposed based on the residuals of the magnitude vector of the stress correlation function. The monitoring data of Zhuhai Grand Theatre for 30 d within 5 months are analysed. By applying the proposed method to the Zhuhai Grand Theatre, the slowly varying temperature effects are effectively separated, the local damage identification result is in accordance with the presupposed situation, where the feasibility and accuracy of the proposed method is confirmed.
An adaptive acoustic signal reconstruction and fault diagnosis method for rolling bearings based on SSDAE–MobileViT
Authors: Gu Yingkui , Wang Puzhou , Li Yin , You Keshun , Qiu Guangqi
Published: November 2024

The Stack denoising autoencoder (SDAE) is suitable for acoustic signal denoising because of its ability to learn high-level features automatically, but the reconstruction effect is unstable with high-intensity noise. The reason is that the noise, which is emitted by neighboring equipment, easily disguises the acoustic signals of the target equipment. This reduces the smoothness of the signal and has an impact on the accuracy of the fault diagnosis. Accordingly, this paper presents a supervised SDAE (SSDAE)–mobile vision transformer (MobileViT) model, aiming to identify the fault location and fault degree accurately and efficiently in the presence of substantial background noise interference. First, an SSDAE is established to reduce the high-intensity noise present in the fault acoustic signals; the Huber loss between the reconstructed signal and the theoretical signal is employed to guide the fine-tuning of the model. Subsequently, the mel-frequency cepstral coefficient was used to extract the acoustic features of the reconstructed signal, and it was converted into a mel-frequency spectrogram. Finally, the MobileViT model is utilized for fault classification. Ultimately, an acoustic fault diagnosis model of rolling bearings under high-intensity noise is obtained. According to comparative experiments, the noise reduction method proposed in this paper achieved the highest level of signal-to-noise ratio increment, waveform similarity coefficient, and mean square deviation in real signals when compared with the three traditional noise reduction methods. Furthermore, the average fault diagnosis accuracy of the fault diagnosis model was found to be 99.2%, which was determined to be optimal in comparison with other fault diagnosis models.
Performance of Cu-doped V2O5 thin film as a hole transport layer in perovskite-based solar cells
Authors: Ongul Fatih
Published: November 2024

Herein, the performance of Cu-doped V2O5 thin film as a hole transport layer (HTL) in inverted planar (p-i-n) perovskite solar cells was reported. The structural, optical, morphological, and electrical properties of Cu-doped V2O5 thin films, with varying Cu concentrations, were analyzed using x-ray photoelectron spectroscopy, UV-Vis spectrophotometry, atomic force microscopy, Kelvin probe force microscopy, and a four-point probe system. The sheet resistance of the V2O5 HTLs decreased significantly with Cu doping, leading to an increase in the devices’ short-circuit current, which depended on the Cu concentration in the V2O5 thin films. It was demonstrated that V2O5 thin films produced using a low-temperature process can serve as a HTL in p-i-n perovskite solar cells. Furthermore, Cu doping in V2O5 thin films was shown to enhance the power conversion efficiency of the devices.
Determining the hydrogen production potential of ConMo6Se8 chevrel phases
Authors: Gencer Aysenur , Surucu Ozge , Sahin Murat , Ozel Faruk , Surucu Gokhan
Published: November 2024

In this study, the Co

n

Mo
6
Se
8 (n = 1, 2, 3, and 4) Chevrel phases are investigated by using Density Functional Theory (DFT) to reveal their potential for photocatalytic hydrogen production. The stability conditions of these phases reveal that CoMo
6
Se
8, Co
2
Mo
6
Se
8, and Co
3
Mo
6
Se
8 satisfy the thermodynamic and mechanic stability properties, while Co
4
Mo
6
Se
8 does not satisfy any of these properties. Furthermore, the formation enthalpy of these phases shows that CoMo
6
Se
8, Co
2
Mo
6
Se
8, and Co
3
Mo
6
Se
8 can be synthesized experimentally due to having negative formation enthalpy values. Furthermore, the thermal stabilities of the machine-learning (ML) force fields are investigated by ab-initio molecular dynamics (AIMD) calculations. The electronic properties of these phases are also investigated in detail, and it is found that Co
3
Mo
6
Se
8 has a suitable band gap for photocatalytic water splitting. Concerning the investigation of the valence band and conduction band levels, it is shown that Co
3
Mo
6
Se
8 has a conduction band minimum level suitable for producing hydrogen. This study is the first attempt to reveal the hydrogen production performance of the Co

n

Mo
6
Se
8 (n = 1, 2, 3, and 4) Chevrel phases as far as the literature is concerned, paving the ground for future investigations in this field.
Close correlations among thermodynamic, structural and mechanical properties in Mg-Cu-Y metallic glasses
Authors: Feng Haonan , Zhang Xingguang , Pan Shaopeng , Niu Xiaofeng , Qiao Junwei , Song Kaikai , Wang Weimin , Qin Jingyu
Published: November 2024

Utilizing classical molecular dynamics simulations, this paper delves into close correlations among thermodynamic, structural and mechanical properties of Mg90-x
Cu
x
Y10 metallic glasses. The investigation reveals a peak in the glass transition temperature when the concentration of Cu (c
Cu) reaches about 0.6, indicating an optimal composition for enhanced glass-forming ability within this alloy system. Additionally, the thermodynamic parameters and some atomic structures of MgCuY metallic glasses, characterized by pair distribution function, coordination number and Warren-Cowley parameters, also change at c
Cu = 0.6. Moreover, a quadratic relationship is uncovered between the glass transition temperature and enthalpy of mixing, and a linear relationship between strength and c
Cu is observed for c
Cu < 0.6, which might be correlated with the atomic structure around Y atoms. These results have effectively verified that there is a close correlation among thermodynamic, structural and mechanical properties of metallic glass.
Ultrathin transparent indium tin oxide-based electrodes for enhanced performance of perovskite solar cells
Authors: Shafique Amina , Amin Uzma , Abu-Siada Ahmed
Published: November 2024

Perovskite solar cells (PSCs) have been given much attention in photovoltaics-based power generation, particularly in building integrated photovoltaics (BIPV) applications due to their lightweight and promising technical performance. PSCs exhibit remarkable transparency to visible light, which makes them an ideal candidate for BIPV applications such as glass-based solar facades and clear solar windows. As the PSC is yet an immature technology, much research is still required to validate its visibility and cost-effectiveness for different applications including electrical vehicles. This paper takes one step forward in achieving this goal by presenting a new ultrathin transparent electrodes (UTE) design that comprises a square patch layout to improve the performance of transparent conductive materials. The proposed electrode design is aimed to improve the absorption of the material in the ultra-violet (UV) region with high optical transparency. To assess the angular dependence on the absorption characteristics, both transverse magnetic and transverse electric modes are studied at various oblique angles of incident light. Furthermore, interference theory is applied numerically to validate the proposed UTE design. The impact of various geometric parameters including period, ground height, spacer height, and top square resonator length on the performance of the proposed UTE layout is investigated through detailed simulation analysis. Moreover, surface electric field patterns are analyzed to understand the absorption mechanism of the proposed UTE. Results reveal the effectiveness of the proposed structure for various BIPV applications including electric vehicles, wearable electronics, and tandem devices.
Dilaton generation in propagation of magnetic dipole waves of pulsar in a galactic magnetic field
Authors: Astashenkov M.O. , Bedda A.V. , Parfenov K.V. , Vshivtseva P.A.
Published: November 2024

This study is devoted to dilaton generation during the propagation of magnetic dipole waves from a pulsar in the galactic magnetic field. Dilaton generation occurs at cosmological scales on the order of the coherence lengths of the galactic magnetic field L
coh, approximately 100 pc.

The exact solutions of the dilaton field equation in a vacuum and in the interstellar medium with reflective index n = 1 + χ, χ ≪ 1 have been obtained, and the angular distribution of emitted dilaton energy has been determined in both cases. It has been shown that the dilaton generation intensity at first increases proportionally to r
2, where r is distance from the neutron star to the observation point, then has oscillating behavior. The obtained results are applicable only for r < L
coh.

For a millisecond pulsar with a magnetic field BS
∼ 109 Gauss, located at a distance from Earth on the order of the coherence length of the galactic magnetic field L
coh ∼ 100 pc, the obtained intensity of the dilaton generation can be greater in 100 times than the analogous intensity produced by rotating magnetic dipole momentum of a pulsar.

Based on estimated values, the impact of pulsar and magnetar gravitational fields on magnetic dipole wave radiation is minimal and changes the amplitude of the waves by around 1 percent. For this reason, the effect of the gravitational field on the dilaton formation process can be disregarded in this study.
Hawking radiation and Page curve of regular black holes
Authors: Dong 董 Chen-Yang 晨阳 , Tian 田 Li-Jun 立君
Published: November 2024

We discuss the information paradox and its implications for regular black holes. Our primary focus is on Page curve using the island treatment and analyzing relevant parameters like Page time and scrambling time. Calculations without considering the island show that the entanglement entropy increases linearly and continues to infinity. When we consider the generalized entropy, we find that the island extends just beyond the horizon, leading to a constant entanglement entropy. Specifically, we find that in the early stages, the island never forms, regardless of the charge and mass configuration of the black hole.
Stable nanobubbles on ordered water monolayer near ionic model surfaces
Authors: Huang 黄 Luyao 璐瑶 , Ling 凌 Cheng 澄 , Zhou 周 Limin 利民 , Liang 梁 Wenlong 文龙 , Huang 黄 Yujie 雨婕 , Zhang 张 Lijuan 立娟 , Maitarad Phornphimon , Zhang 张 Dengsong 登松 , Wang 王 Chunlei 春雷
Published: November 2024

The stable nanobubbles adhered to mineral surfaces may facilitate their efficient separation via flotation in the mining industry. However, the state of nanobubbles on mineral solid surfaces is still elusive. In this study, molecular dynamics (MD) simulations are employed to examine mineral-like model surfaces with varying degrees of hydrophobicity, modulated by surface charges, to elucidate the adsorption behavior of nanobubbles at the interface. Our findings not only contribute to the fundamental understanding of nanobubbles but also have potential applications in the mining industry. We observed that as the surface charge increases, the contact angle of the nanobubbles increases accordingly with shape transformation from a pancake-like gas film to a cap-like shape, and ultimately forming a stable nanobubble upon an ordered water monolayer. When the solid–water interactions are weak with a small partial charge, the hydrophobic gas (N2) molecules accumulate near the solid surfaces. However, we have found, for the first time, that gas molecules assemble a nanobubble on the water monolayer adjacent to the solid surfaces with large partial charges. Such phenomena are attributed to the formation of a hydrophobic water monolayer with a hydrogen bond network structure near the surface.
Novel high-temperature-resistant material SbLaO3 with superior hardness under high pressure
Authors: Chen 陈 Haoqi 浩琦 , Jiang 姜 Haowen 皓文 , Jiang 姜 Xuehui 雪辉 , Wang 王 Jialin 佳琳 , Zhang 张 Chengyao 铖瑶 , Duan 段 Defang 德芳 , Dong 董 Jing 晶 , Ma 马 Yanbin 艳斌
Published: November 2024

Perovskites have garnered significant attention in recent years. However, the presence of La atoms at the B-site in ABX
3 structures has not yet been observed. Under high pressure, perovskites exhibit unexpected phase transitions. In this study, we report the discovery of SbLaO3 under ambient pressure, with a space group of R3m. Mechanical property calculations indicate that it is a brittle material, and it possesses a band gap of 4.0266 eV, classifying it as an insulator. We also investigate the phase at 300 GPa, where the space group shifts to P21/m. Additionally, the P21/m phase of LaInO3 under 300 GPa is explored. Ab initio molecular dynamics calculations reveal that the melting point of SbLaO3 is exceptionally high. The inclusion of Sb alters the electronic structure compared with LaInO3, and the Vickers hardness (H
v) is estimated to reach 20.97 GPa. This research provides insights into the phase transitions of perovskites under high pressure.
Schwarzschild black hole surrounded by a cloud of strings in the background of perfect fluid dark matter*
Authors: Hamil B. , Lütfüoğlu B. C.
Published: November 2024

This manuscript investigates a Schwarzschild black hole surrounded by perfect fluid dark matter embedded in a cloud of strings. The effects of its surroundings on thermodynamics, timelike and null geodesics, shadows, and quasinormal modes are analyzed. It is demonstrated that changes in spacetime, induced by the surrounding environment, significantly influence the stability, thermal phases, energy dynamics, particle trajectories, and observable features of the black hole's shadow, as well as its oscillation frequency and decay rate.