bluuebunny/crossref_metadata_2025_split huggingface dataset:
Multi-graph attention fusion graph neural network for remaining useful life prediction of rolling bearings
Authors: Xiao Yongchang , Cui Lingli , Liu Dongdong 
Published: July 2024

Abstract
Graph neural network (GNN) has the proven ability to learn feature representations from graph data, and has been utilized for the tasks of predicting the machinery remaining useful life (RUL). However, existing methods only focus on a single graph structure and cannot integrate the correlation information contained in multi-graph structures. To address these issues, a multi-graph structure GNN prediction method with attention fusion (MGAFGNN) is proposed in this paper for GNN-based bearing RUL prediction. Specifically, a multi-channel graph attention module is designed to effectively learn the similar features of node neighbors from different graph data and capture the multi-scale latent features of nodes through the nonlinear transformation. Furthermore, a multi-graph attention fusion module (MGAFM) is proposed to extract the collaborative features from the interaction graph, thereby fusing the feature embeddings from different graph structures. The fused feature representation is sent to the long short-term memory network to further learn the temporal features and achieve RUL prediction. The experimental results on two bearing datasets demonstrate that MGAFGNN outperforms existing methods in terms of prediction performance by effectively incorporating multi-graph structural information.
Polycrystalline silicon, a molecular dynamics study: II. Grains, grain boundaries and their structure
Authors: Lahti Antti , Santonen Mikael , Rad Zahra Jahanshah , Miettinen Mikko , Ebrahimzadeh Masoud , Lehtiö Juha-Pekka , Laukkanen Pekka , Punkkinen Marko , Paturi Petriina , Kokko Kalevi , Kuronen Antti , Li Wei , Vitos Levente , Parkkinen Katja , Eklund Markus 
Published: July 2024

Abstract
Polycrystalline silicon (poly-Si) is an excellent material for use in microelectronic devices, both in electrical and mechanical applications. Its mechanical and electrical properties are widely adjustable, its processing technology is compatible with existing microcircuit manufacturing technology, and its availability and recyclability are at a high level. Here, we focus on investigating the properties of poly-Si that distinguish it from other forms of silicon, that is, grains, grain boundaries, and the conditions and treatments that determine grain and grain boundary properties. Starting from the molecular dynamics simulations of the deposition of thin poly-Si films under different growth conditions we study the properties of the films, grains, and grain boundaries as a function of growth time, growth temperature, and post-annealing. We aim to get data and information that will form the essential basis for future research on the electrical properties of poly-Si. The main results are: (i) the effect of post-annealing on the distribution of the grain size and grain boundary thickness (ii) the distribution of the grain orientations, and (iii) the density of the 3- and 5-bonded atoms as a function of deposition temperature.
Cathodoluminescence studies of the optical properties of a zincblende InGaN/GaN single quantum well
Authors: Gundimeda Abhiram , Kusch Gunnar , Frentrup Martin , Kappers Menno J , Wallis David J , Oliver Rachel A 
Published: July 2024

Abstract
Zincblende GaN has the potential to improve the efficiency of green- and amber-emitting nitride light emitting diodes due to the absence of internal polarisation fields. However, high densities of stacking faults are found in current zincblende GaN structures. This study presents a cathodoluminescence spectroscopy investigation into the low-temperature optical behaviour of a zincblende GaN/InGaN single quantum well structure. In panchromatic cathodoluminescence maps, stacking faults are observed as dark stripes, and are associated with non-radiative recombination centres. Furthermore, power dependent studies were performed to address whether the zincblende single quantum well exhibited a reduction in emission efficiency at higher carrier densities—the phenomenon known as efficiency droop. The single quantum well structure was observed to exhibit droop, and regions with high densities of stacking faults were seen to exacerbate this phenomenon. Overall, this study suggests that achieving efficient emission from zinc-blende GaN/InGaN quantum wells will require reduction in the stacking fault density.
Strong doping reduction on wafer-scale CVD graphene devices via Al2O3 ALD encapsulation
Authors: Dockx K , Barnes M D , Wehenkel D J , van Rijn R , van der Zant H S J , Buscema M 
Published: July 2024

Abstract
We present the electrical characterization of wafer-scale graphene devices fabricated with an industrially-relevant, contact-first integration scheme combined with Al2O3 encapsulation via atomic layer deposition. All the devices show a statistically significant reduction in the Dirac point position,

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cnp

, from around +47 V to between −5 and 5 V (on 285 nm SiO2), while maintaining the mobility values. The data and methods presented are relevant for further integration of graphene devices, specifically sensors, at the back-end-of-line of a standard CMOS flow.
Substrate-induced strain in molybdenum disulfide grown by aerosol-assisted chemical vapor deposition
Authors: Adams Lewis J , Matthews Peter D , Morbec Juliana M , Balakrishnan Nilanthy 
Published: July 2024

Abstract
Transition metal dichalcogenides have been extensively studied in recent years because of their fascinating optical, electrical, and catalytic properties. However, low-cost, scalable production remains a challenge. Aerosol-assisted chemical vapor deposition (AACVD) provides a new method for scalable thin film growth. In this study, we demonstrate the growth of molybdenum disulfide (MoS2) thin films using AACVD method. This method proves its suitability for low-temperature growth of MoS2 thin films on various substrates, such as glass, silicon dioxide, quartz, silicon, hexagonal boron nitride, and highly ordered pyrolytic graphite. The as-grown MoS2 shows evidence of substrate-induced strain. The type of strain and the morphology of the as-grown MoS2 highly depend on the growth substrate’s surface roughness, crystallinity, and chemical reactivity. Moreover, the as-grown MoS2 shows the presence of both direct and indirect band gaps, suitable for exploitation in future electronics and optoelectronics.
Constrained hidden Markov models reveal further Hsp90 protein states
Authors: Tancredi Riccardo , Feltrin Antonio , Infirri Giosuè Sardo , Toso Simone , Leonie Vollmar  , Hugel Thorsten , Baiesi Marco 
Published: July 2024

Abstract
Time series of conformational dynamics in proteins are usually evaluated with hidden Markov models (HMMs). This approach works well if the number of states and their connectivity is known. However, for the multi-domain protein Hsp90, a standard HMM analysis with optimization of the BIC (Bayesian information criterion) cannot explain long-lived states well. Therefore, here we employ constrained HMMs, which neglect transitions between states by including assumptions. Gradually tuning a model with justified and focused changes allows us to improve its effectiveness and the score of the BIC. This became possible by analyzing time traces with several thousand observable transitions and, therefore, superb statistics. In this scheme, we also monitor the residences in the states reconstructed by the model, aiming to find exponentially distributed dwell times. We show how introducing new states can achieve these statistics but also point out limitations, e.g. for substantial similarity of two states connected to a common neighbor. One of the states displays the lowest free energy and could be the idle open ‘waiting state’, in which Hsp90 waits for the binding of nucleotides, cochaperones, or clients.
On fractional discrete financial system: Bifurcation, chaos, and control
Authors: Diabi Louiza , Ouannas Adel , Hioual Amel , Momani Shaher , Abbes Abderrahmane 
Published: July 2024

Abstract
The dynamic analysis of financial systems is a developing field that combines mathematics and economics to understand and explain fluctuations in financial markets. This paper introduces a new three-dimensional (3D) fractional financial map and we dissect its nonlinear dynamics system under commensurate and incommensurate orders. As such, we evaluate when the equilibrium points are stable or unstable at various fractional orders. We use many numerical methods, phase plots in 2D and 3D projections, bifurcation diagrams and the maximum Lyapunov exponent. These techniques reveal that financial maps exhibit chaotic attractor behavior. This study is grounded on the Caputo-like discrete operator, which is specifically influenced by the variance of the commensurate and incommensurate orders. Furthermore, we confirm the presence and measure the complexity of chaos in financial maps by the 0–1 test and the approximate entropy algorithm. Additionally, we offer nonlinear-type controllers to stabilize the fractional financial map. The numerical results of this study are obtained using MATLAB.
Entropy variances of pure coherent states in the diffusion channel
Authors: Wu 吴 Wei-Feng 卫锋 , Fang 方 Yong 勇 , Fu 付 Peng 鹏 
Published: July 2024

Abstract
Using the operator correspondence of the real and fictious modes in the thermo entangled state representation, we solve the quantum master equation describing the diffusion channel and obtain the Kraus operator-sum representation of its analytical solution. we find that the pure coherent states evolve into the new mixed thermal superposed states in the diffusion channel. Also, we investigate the statistical properties of the initial coherent states and their entropy evolutions in the diffusion channel, and find that the entropy evolutions are only related to the decay time and without the amplitudes of the initial coherent states.
Quantum confinement of carriers in the type-I quantum wells structure
Authors: Li 李 Xinxin 欣欣 , Deng 邓 Zhen 震 , Jiang 江 Yang 洋 , Du 杜 Chunhua 春花 , Jia 贾 Haiqiang 海强 , Wang 王 Wenxin 文新 , Chen 陈 Hong 弘 
Published: July 2024

Abstract
Quantum confinement is recognized to be an inherent property in low-dimensional structures. Traditionally, it is believed that the carriers trapped within the well cannot escape due to the discrete energy levels. However, our previous research has revealed efficient carrier escape in low-dimensional structures, contradicting this conventional understanding. In this study, we review the energy band structure of quantum wells along the growth direction considering it as a superposition of the bulk material dispersion and quantization energy dispersion resulting from the quantum confinement across the whole Brillouin zone. By accounting for all wave vectors, we obtain a certain distribution of carrier energy at each quantized energy level, giving rise to the energy subbands. These results enable carriers to escape from the well under the influence of an electric field. Additionally, we have compiled a comprehensive summary of various energy band scenarios in quantum well structures relevant to carrier transport. Such a new interpretation holds significant value in deepening our comprehension of low-dimensional energy bands, discovering new physical phenomena, and designing novel devices with superior performance.
Comparative study of nudged elastic band and molecular dynamics methods for diffusion kinetics in solid-state electrolytes
Authors: Lin 林 Aming 啊鸣 , Shi 石 Jing 晶 , Wei 魏 Su-Huai 苏淮 , Sun 孙 Yi-Yang 宜阳 
Published: July 2024

Abstract
Considerable efforts are being made to transition current lithium-ion and sodium-ion batteries towards the use of solid-state electrolytes. Computational methods, specifically nudged elastic band (NEB) and molecular dynamics (MD) methods, provide powerful tools for the design of solid-state electrolytes. The MD method is usually the choice for studying the materials involving complex multiple diffusion paths or having disordered structures. However, it relies on simulations at temperatures much higher than working temperature. This paper studies the reliability of the MD method using the system of Na diffusion in MgO as a benchmark. We carefully study the convergence behavior of the MD method and demonstrate that total effective simulation time of 12 ns can converge the calculated diffusion barrier to about 0.01 eV. The calculated diffusion barrier is 0.31 eV from both methods. The diffusion coefficients at room temperature are 4.3 × 10−9 cm2⋅s−1 and 2.2 × 10−9 cm2⋅s−1, respectively, from the NEB and MD methods. Our results justify the reliability of the MD method, even though high temperature simulations have to be employed to overcome the limitation on simulation time.
Factors Influencing Tourist Visit to Jumog Waterfall Ngargoyoso Sub-District Karanganyar District
Authors: Kedaton E. , Kiat U. E. I. 
Published: July 2024

Abstract
The influence of accessibility, facilities, and tourist location on visitor satisfaction to Jumog Waterfall. There are three objectives in this study, namely: Analyzing the effect of accessibility on visitor satisfaction to Jumog Waterfall; Knowing the effect of facilities on visitor satisfaction with Jumog Waterfall; and Analyzing the effect of location on visitor satisfaction with Jumog Waterfall. The tool used in multiple linear regression analysis is SPSS 16.0. Accessibility, facilities, and location as independent variables. Visitor satisfaction is dependent. The test model for multiple linear regression analysis is the F-Test and T-Test, where the Coefficient Regression Full Model and Anova Model are selected as the best models. The first analysis indicates a significant positive impact of enhanced accessibility on visitor satisfaction at Jumog Waterfall, supported by a notable F-Test value of 2.70. The findings highlight a meaningful correlation between improved facilities and heightened visitor satisfaction at Jumog Waterfall, as evidenced by the obtained t-test distribution value of 1.984. The study identifies a substantial positive effect of favorable location characteristics on visitor satisfaction at Jumog Waterfall, further supported by the overall significance level of 0.000 < 0.05, leading to the rejection of the null hypothesis (H0).
Environmental Analysis of Basic Sanitation Quality of Residential Houses in Cokro Spring Stream Central Java, Indonesia
Authors: Asyfiradayati R , Umaroh AK , Wulandari W , Porusia M , Novembe JB , Khairunnisa NI , Suparmin  
Published: July 2024

Abstract
Fulfillment of basic sanitation includes clean water, availability of latrines, wastewater disposal facilities, and waste management facilities. Cokro Klaten Spring along its flow has many activities including washing clothes and agricultural activities by the surrounding community. The purpose of this study was to determine the quality of basic sanitation owned by the community using Cokro spring water. This research method is descriptive to find out in detail the conditions that exist at the research location by taking data through questionnaires on respondents as many as 298 households who at the time of the study were carrying out activities using the flow of Cokro Klaten Spring. The results of research on basic sanitation of residential houses along the flow of Cokro Klaten springs are known that all houses (100%) have access to clean water both from wells and PAM which can be used to meet daily clean water needs. However, for the availability of latrines, there are still 9 (3%) houses that do not have latrines and still as many as 20% of houses that have latrines do not meet the requirements for healthy latrines in accordance with the provisions of the Minister of Health No. 39 of 2016. In terms of the availability of waste disposal facilities, as many as 56 (18.8%) do not have waste disposal facilities because they directly throw garbage into the river and from 298 houses there are still 23 houses (7.7%) that do not have wastewater disposal channels, they directly drain domestic wastewater to the back of their yards. The conclusion of this study is that the sanitation of residential houses in the Cokro Klaten spring stream has fulfilled the fulfillment of clean water, but the availability of latrines, waste management facilities and wastewater disposal has not met the basic sanitation requirements. Improvement of basic sanitation is needed to improve the quality of sanitation, especially in the provision of waste disposal facilities so that the community meets the quality of basic sanitation in accordance with the Minister of Health of the Republic of Indonesia Number 829 / Menkes / SK / VII / 1999.
The area and distribution changes of mangrove forests on the coast of Gresik Regency, East Java, 2012-2023
Authors: Muryani Chatarina , Ni’matussyahara Dannis 
Published: July 2024

Abstract
Environmental dynamics in coastal areas have resulted in changes in the area and distribution of mangrove forests in Gresik Regency. Mangroves have ecological and economic functions for living things. This study aims to analyse changes in the area and distribution of mangrove forests in Gresik Regency in 2012 and 2023. The data source is IKONOS imagery from Google Earth in 2012 and 2023, the coastal location of Gresik Regency, East Java Province. Interpretation and digitisation were done to determine the area and distribution of mangrove forests, and maps of the mangrove forests were produced in 2012 and 2023. Then, the two maps were overlayed to determine their area and distribution changes. Based on image interpretation and analysis, in 2012, the area with the largest mangrove forest was Ujung Pangkah District (802.75 hectares) or 63.21% of the total mangrove forest area of Gresik Regency. The largest mangrove forest in 2023 is still in Ujung Pangkah District, with an area of 1261.50 hectares or 64.26%. For ten years (from 2012 to 2023), Gresik Regency’s mangrove forests increased by 590.41 hectares, the most significant increase in Ujung Pangkah District (increased by 458; 76 hectares).
Influence of Built-up Land and Vegetation Density to Urban Cool Island in Bandung City
Authors: Mustofa J A , Hadibasyir H Z 
Published: July 2024

Abstract
Land use change is causing higher temperatures in urban centers, posing challenges for cities seeking livability and maintainability. Urban Cool Island can improve comfort in urban areas by directing microclimate and lowering temperature rise. The impact of Surface Urban Cool Island (SUCI) on a city’s ability to withstand urban microclimate phenomena is investigated in this study. This study aims to spatially analyze the spatial distribution, correlation, and impact of vegetation, surface temperature (LST), and built-up land density on Urban Cool Island Intensity. The method used was quantitative descriptive analysis of image data, including extraction of LST, NDVI, NDBI, and statistical analysis in the form of correlation and regression tests. The findings indicate that the Bandung City SUCI phenomena happened outside of the city at an intensity of -7.74°C to 0°C. Moderate vegetation density tends to be the cause of SUCI intensity, affecting 33.68%. Meanwhile, the density of built-up land has an effect of 43.18% on the intensity of SUCI. Correlation and regression analysis show that the relationship between SUCI intensity and NDVI is inversely proportional, while the relationship between NDBI and SUCI intensity is directly proportional. Denser buildings result in hotter SUCI intensity.
Analysis of the Direction and Prediction of Built-Up Land Development in Slawi Sub-district, Tegal Regency, Indonesia in 2045
Authors: Mahendradhata M , Danardono D , Surachman D 
Published: July 2024

Abstract
Slawi Sub-district is characterized by a high population density as it serves as both the capital of Tegal Regency and the central hub of the Tegal Regency government. The large growth of built-up land threatens the balance of the environment and uncontrolled spatial planning. This study aims to predict the development of built-up land in Slawi Subdistrict in 2045 and determine the direction of built-up land development in Slawi Subdistrict in 2007, 2015, 2023, and 2045. The research approach used Geographic Information System with the prediction of Cellular Automata (CA) Markov Chain prediction model. The inputs of the CA Markov model are the driving factors of land cover change consisting of road network, river network, government, settlement, and slope. The results showed that in 2045 the predicted built-up land area was 1,111.72 ha or 71.41% of the total land cover. The development of built-up land in Slawi Sub-district is closely related to the road distribution pattern, where the north and south are influenced by arterial road and rail road, while the east and west are influenced by collector roads.
Reduction Of The Potential Of Landslides With Vegetative Methods In The Sub-DAS Of Kali Arus, Banyumas Regency
Authors: Akhmad G R , Suwarno  , Sutomo  , Chidmahdjati A B , Sakir  
Published: July 2024

Abstract
Landslides are one of the natural disasters that often occur. The magnitude of the potential for landslides is caused by several factors including geomorphological conditions, geology, soil, land use, and rainfall. The goal of this research is to investigate the technique of reducing the potential for landslides in the research area using the vegetative method with a geomorphological approach. The research method uses a survey method, which includes fieldwork and laboratory work. Data processing uses scoring or weighting techniques. Data analysis for landslide potential reduction techniques utilizing qualitative descriptive. Reducing the potential for landslide natural disasters vegetatively, namely by selecting the type of vegetation that is following the characteristics and quality of the landform. Plants can be used to control landslides as a result of the research. Mahoni, Jati, and Sengon are plants that can be used to control landslides in the suitable and marginally suitable land suitability classes, reducing the potential for landslides through the analysis of land characteristics and land quality in each landform unit. The results of the land characteristics and land quality analysis are used to map land suitability classes for a variety of annual crops.
Detection Of Peatland Coastline Changes Due To Land Use Change On Bengkalis Island, Riau, Indonesia
Authors: Nabilah D. H. , Wibowo A. A. , Wardani K. S. 
Published: July 2024

Abstract
Beaches with peat soil material, especially in small island areas, are very vulnerable to coastline deterioration. Many things cause the back and forth of the coastline, including the occurrence of landslides of peat material towards the sea, commonly called Peat Bog Bursts. This research aims to reveal shoreline changes on the north and west coasts of Bengkalis Island using a remote sensing technology approach. As well as analyzing factors related to shoreline changes. The use of Landsat 8 and 9 images in 2013, 2015, 2017, 2019, 2021, and 2023 were processed on Google Earth Engine using the Canny method to produce shoreline data. Furthermore, modeling was carried out using DSAS (Digital Shoreline Analysis System) to analyze changes in the coastline and reveal the causes of coastal damage. There has been a conversion of land use from forests or fields to oil palm plantation areas on the west side of Bengkalis Island from 2004 to the present. Based on the modeling results, it was found that a Peat Bog Burst occurred in 2015 causing significant changes in the coastline until 2017. Sediments were deposited in the southern area of the west side of Bengkalis Island (Zone A).