bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optical, structural, and vibrational properties of In2S3 thin films by sputtering-RF for applications in optoelectronics devices
Authors: López-Sánchez A F , Mendoza-Pérez R , Fierro-López J A , G Zayas-Bazan P , Sastré-Hernández J , Aguilar-Hernández J R , Contreras-Puente G S 
Published: December 2024

Abstract
Experimental results on the crystalline orientation properties, energy band gap, and Raman vibrational modes of Indium Sulfide (In2S3) thin films grown by Sputtering in Radio Frequency mode are presented. The In2S3 thin films were grown at 25, 200, and 300 °C; thereafter the samples were thermally annealed in air for 30 min at 450 °C, in order to improve their crystalline and physical properties. Energy dispersive x-ray spectroscopy results showed that the β-In2S3 crystallographic phase became predominant as the substrate temperature increased. For the optical transmittance spectra, it was observed that the deposited In2S3 thin films at 300 °C and with thermal annealing showed an increase in their band gap energy of nearly 60 meV. The direct energy bandgap of In2S3 films varied in the range 2.76–2.82 eV. The scanning electron microcopy image and elemental analysis shows a better morphology, and an increase in O and Sn when the In2S3 samples were subjected to thermal annealed and the substrate temperature increased, respectively. Photoluminescence spectra were obtained at room temperature and showed two emission bands around 1.75 (709 nm) and 2.35 eV (527 nm), one related to interstitial indium donor sites (Ini) and oxygen acceptor vacancies (OVs), and the second to an emission band corresponding to the transition sulfur donor-indium acceptor. As the substrate temperature increased and thermal annealing of In2S3 was performed, the 1.75 eV emission bands increased in intensity with respect to the 2.35 eV band. From the Raman measurements, it was observed that the vibrational peaks were better defined as the substrate temperature increased and In2S3 underwent thermal annealing. In addition, to study the spinel-like defect structure, the peaks corresponding to the five main vibrational modes of In2S3 were identified as the Alg mode, Eg mode, and three modes of the F2g species.
Protonated molecular clusters: promoting molecular complexity*
Authors: Comte Denis , Lavy Léo , Parrado-Ospina Laura , Lissillour Hector , Bertier Paul , Calvo Florent , Daniel Isabelle , Farizon Bernadette , Farizon Michel 
Published: December 2024

Abstract
Molecules identified in Space display a diversity greater than ever, yet the mechanisms responsible for this complexity remain largely unknown. The extreme conditions faced by these molecules under astrophysical conditions raise several questions about their persistence and evolution. In this work, we explore the role of gas-phase protonated molecular dimers, which act both as protectors of existing molecules and as promotors in the emergence of new species. Experiments were conducted using the DIAM irradiation device on four protonated dimers of astrophysical interest, namely the pyridine, methanol, glycine pure dimers and the diglycine-glycine mixed dimer. Analysis of the observed relaxation channels following an energy deposition mimicking cosmic radiation reveals three main mechanisms of evaporation, covalent bond breaking, and unimolecular reaction. Focusing on the latter, our experiments combined with quantum chemical calculations of the relevant pathways shed new light onto the role of the protonation site on the reactants.
Optimization of Skanavi model and its application to high permittivity materials
Authors: Luo 罗 Hao 昊 , Qin 秦 Xinrui 新瑞 , Geng 耿 Kejia 可佳 , Kong 孔 Cuncun 存存 , Cheng 成 Pengfei 鹏飞 
Published: December 2024

Abstract
A novel method is introduced to optimize the traditional Skanavi model by decomposing the electric field of molecules into the electric field of ions and quantitatively describing the ionic-scale electric field by the structural coefficient of the effective electric field. Furthermore, the optimization of the Skanavi model is demonstrated and the ferroelectric phase transition of BaTiO3 crystals is revealed by calculating the optical and static permittivities of BaTiO3, CaTiO3, and SrTiO3 crystals and the structure coefficients of the effective electric field of BT crystals after Ti4+ displacement. This research compensates for the deficiencies of the traditional Skanavi model and refines the theoretical framework for analyzing dielectric properties in high permittivity materials.
Research on Temperature Control Anti-cracking in the Main River Bed Dam Section of Concrete Gravity Dams in the Cold Area
Authors: Jiang Rui , Li Xiulin , Xia Shifa , Cao Shiyue 
Published: December 2024

Abstract
Cracks have always been a difficult problem in the construction and operation of water conservancy projects. Once cracks occur in concrete dams, it will have an impact on the appearance, structural bearing capacity, waterproofing, durability and service life of the dams. Taking the 9# typical retaining dam section of SETH Dam in Xinjiang as an example, this paper uses the three-dimensional finite element method to simulate the temperature field and stress field of the typical dam section during construction and operation, considering the actual pouring progress of the dam and various temperature control measures taken during construction. The results show that the thermal insulation measures adopted in this project have good effects. According to the analysis results, some construction suggestions are put forward, such as strengthening downstream thermal insulation and continuous monitoring, pouring upstream and downstream through warehouses, avoiding long interval and multiple empty pouring blocks, and avoiding exposure of overwintering surface.
Research on Testing Methods for the Modulus of Elasticity of Inorganic Binder-Strengthened Materials based on the Direct Strain Method
Authors: Feng Liu , Peng Zhang , Xinquan Xu , Changhua Liang 
Published: December 2024

Abstract
In order to obtain the elastic modulus of inorganic binder-stabilized materials based on the lateral method, firstly, by analyzing the constitutive model of the material’s elastic modulus, a testing system for the elastic modulus of inorganic binder-stabilized materials was constructed using pressure sensors, resistance strain gauges, and dynamic and static strain data testing systems. Secondly, based on the stability test of the strain gauges glued to the surface of the specimen, it is proposed that the zero drift of the strain gauges should be controlled within 0~6με within 6 minutes of the test load. Meanwhile, based on the experimental loading results, it is determined that the length of the strain gauge wire mesh used for modulus testing of inorganic binder-stabilised materials should be 30mm. Finally, elastic modulus testing of inorganic binder-stabilised materials was carried out on core samples drilled at Longxun highway in Guangdong Province. The modulus of elasticity of on-site drilled core specimens was determined by the test and the test results were at the same data level as those measured by the rigid ring method, indicating reliable analysis results. The experimental results show that the direct strain method with the elastic modulus testing system as the core can greatly reduce the test preparation time, ensure stable system operation and provide reliable test results.
Numerical study of cavitation characteristics in mixed-flow turbine
Authors: Zhang Guihua 
Published: December 2024

Abstract
In this paper, a numerical method is employed to investigate the internal flow of a mixed-flow turbine. A fully three-dimensional turbulence calculation method is adopted, utilizing the RNG k-ε turbulence model and SIMPLE algorithm. This simulation calculates the entire flow channel from the volute inlet to the draft tube outlet in a single comprehensive simulation. Based on the obtained three-dimensional cavitation flow field data, a flow field analysis of the runner’s internal flow is conducted, allowing for the computation of the critical cavitation coefficient. Additionally, the cavitation conditions at the runner outlet and within the draft tube under different cavitation characteristics are simulated.
The Combination of X-ray Ct and Multi-particle Finite Element Method for Powder Compaction
Authors: Che Lida , Wang Kai , Wu Zhanfang , Li Xiangyang 
Published: December 2024

Abstract
The macroscopic mechanical properties of granular materials are closely related to their microscopic properties, and studying the compression problem of powder is helpful for establishing a constitutive law of powder compaction process. This study utilized X-ray CT technology to investigate the 3D numerical analysis model of loose particle stacking and compaction based on MPFEM, and investigated the mechanical behavior of powder under compression. The results of MPFEM were experimentally verified through powder uniaxial compression experiments, and the results showed that the calculated results of MPFEM were in good agreement with the experimental results. The method of X-ray CT can effectively capture the geometric characteristics of powder particles, and the MPFEM can obtain the true characteristics of plastic deformation of powder bodies, which is an important means of developing powder compaction constitutive models.
Anisotropy study based on uniaxial compression experiments
Authors: Li Yanping , Zou Daqing , Chen Jiancheng , Yu Zhehan , Yu Wenhai , Lu Yunhui , Song Xinhong 
Published: December 2024

Abstract
Due to the striated sedimentary structure of laminated shale and the weak cementation between the layers, the damage patterns of laminated shale with different laminar angles have obvious anisotropy after being damaged by uniaxial compression experiments. In this paper, numerical simulations of uniaxial compression experiments are carried out based on GDEM-PDyna on laminated shale with laminar angles (0°, 15°, 30°, 45°, 60°, 75°, 90°) to explore the anisotropy of compression parameters of laminated shale. The results show that: (1) the uniaxial compressive strength of laminated shale with the increase of the angle of the laminate shows a “U” type change rule which decreases first and then increases, and the uniaxial compressive strength is the smallest when the angle of the laminate reaches 60°; (2) the Poisson’s ratio of the specimen of laminated shale with the increase of the angle of the laminate shows a process which decreases first and then increases, and the change of Poisson’s ratio with the angle of the laminate has the same relationship with the elasticity of the specimen, and it is the same as the change of the compression parameters. The change of Poisson’s ratio with the increase of lamination angle and the change of modulus of elasticity show a similar law, all of them have experienced the “U” type change rule of decreasing first and then increasing, and all of them reach the minimum value when the lamination angle is 30°. (3) The brittleness index of the laminated shale samples showed a “stepwise” decrease with the increase of the laminated angle.
Pressure Effect on Surface Roughness of Gradient Chromium-doped Diamond-like Carbon Coatings under High Temperature
Authors: Liu Xiequan , Liu Qiongxi , Yuan Miaomiao 
Published: December 2024

Abstract
In this paper, the pressure effect of surface roughness of four gradient chromium-doped diamond-like carbon (GCD-DLC) coating is systemically studied in argon annealing and high pressure annealing under high temperature. After HIPping annealing, the surface roughness of the hydrogen-free group (GCr and GCrSi) decreased slightly. However, for the two hydrogen-containing GCD-DLC coatings (DCr and DCrSi), especially the DCr coating, the roughness increased significantly. The changes in surface roughness of the hydrogen-free group and the hydrogen-containing group after high-pressure annealing are opposite. The surface roughness of the DCr coating increased significantly after 500°C HIP annealing, which is attributed to the pores on the coating surface. Only the surface morphology of the DCr coating exhibited significant changes. Numerous voids appeared on the surface of the DCr5H coating after 500°C HIP annealing. There were significant differences in the size and shape of these voids compared to those after 500°C argon annealing. The voids on the coating after argon annealing were larger than those after HIP annealing. The formation of pores is associated with the breaking of carbon-hydrogen bonds and the subsequent release of hydrogen. This is because high pressure slows down the transformation from sp3 carbon bonds to sp2 carbon bonds. Simultaneously, high pressure also slows down the release of hydrogen within the coatings.
Study on seismic performance of narrow flange special-shaped column with herringbone center support
Authors: Xia Bin , Peng Xiaotong , Xu Zhong 
Published: December 2024

Abstract
To solve the problems of convex beam, column and insufficient lateral stiffness of steel frame in residential buildings, a new type of steel special-shaped column with herringbone center support structure system is proposed by combining narrow flange special-shaped column with herringbone center support. The finite element model was established by ABAQUS to study the influence of parameters such as axial compression ratio and shear span ratio on the seismic performance of the structural system. The results show that the hysteresis curve of the structure is full, the lateral bearing capacity is high, and it has stable and reliable energy dissipation performance and plastic deformation ability. The structure has obvious yield and failure process under the action of horizontal reciprocating load, and the whole structure presents ductile failure. The plastic deformation of the structure is concentrated on the support, and the energy is consumed by the buckling of the herringbone central support, while the other structural members remain elastic. The increase of axial compression ratio will lead to a significant decrease in the horizontal bearing capacity and lateral stiffness of the structure. After the buckling of the brace, the structure also has good ductility. With the increase of shear span ratio, the lateral bearing capacity, lateral stiffness and ductility coefficient of the structure decrease.
66kv Modular Composite Material Emergency Repair Tower Simulation of Mechanical Performance and Experimental Study of Components
Authors: Wang Dezhi , Liu Minghui , Wu Xiong , Yu Xin , Wu Hanying , Wang Xingqian , Ye Qianjun 
Published: December 2024

Abstract
This paper details the design and performance evaluation of a 66kV modular insulated tower, aimed at enhancing the resilience and operational flexibility of power systems in extreme environments. The tower employs advanced composite materials, providing excellent mechanical strength. The design addresses various conditions, including line breaks, high wind speeds, and icing scenarios. Finite element analysis conducted using ANSYS software showed that the safety factor for the pole body is 2.14, indicating that the designed tower meets the safety factor requirements. Additionally, its excellent mechanical properties have been verified through mechanical property tests. The modular design facilitates rapid assembly and disassembly as needed across different contexts, significantly improving the efficiency and flexibility of emergency repair work, thus offering considerable benefits for power grid upgrades, maintenance, and disaster recovery. In summary, the 66kV modular insulated tower demonstrates its broad potential applications within modern power systems. The results of this study provide valuable references for power system design, especially in seeking more efficient and adaptable transmission repair solutions.
Gauge coupling unification in correlation study of proton decay
Authors: Džaferović-Mašić Emina 
Published: December 2024

Abstract
Proton decay has been studied for decades now as one of the consequences of grand unified theories. Among those theories exists SU(5) theory, firstly postulated by H. Georgi and S. Glashow [1]. However, there were some problems with this theory such as mass degeneration and coupling unification [1-3]. This created a need for an extension of an original SU(5) model – a specific minimal SU(5) [4-5]. In this minimal SU(5) there is a viable parameter space with achievable gauge coupling unification. In this article, we present the process of gauge coupling unification for three mass scales of new physics states in this model, namely for 1 TeV, 10 TeV, and 100 TeV.
Global impact of seawater intrusion on coastal agriculture
Authors: Ghirardelli Aurora , Straffelini Eugenio , Park Edward , D’Agostino Vincenzo , Masin Roberta , Tarolli Paolo 
Published: December 2024

Abstract
Coastal agriculture faces escalating threats from seawater intrusion (SWI), jeopardizing global food security through freshwater scarcity, soil salinization and crop damage. However, research on SWI often fails to consider its impact on coastal agriculture. Linking georeferenced SWI data with cropland presence, this review examines SWI’s global distribution and primary drivers. Major attested hotspots include the Mediterranean, South and South-East Asia, and the Bohai Sea region in China. Approximately 87 Mha of cropland globally are vulnerable due to low elevation and coastal proximity, including regions where little to no literature has documented SWI. Main drivers include sea-level rise (SLR), drought, groundwater depletion, river modifications, tidal flooding and subsidence. Projections of SLR indicate cropland of North America, the Indian Subcontinent, and South-East Asia as high-risk for SWI. Additionally, regions like South-East Asia and the Indian Subcontinent are expected to experience significant demographic growth in coastal areas. Understanding present and future SWI dynamics is crucial for designing effective mitigation and adaptation strategies in coastal agriculture to support food supply.
Plant growth promoting properties of Methylobacterium brachiatum B0021T and its influence on the growth and short-term thermal stress resistance of Lactuca sativa L
Authors: Agafonova N V 
Published: December 2024

Abstract
The paper describes the investigation of the effect of inoculation by Methylobacterium brachiatum B0021T on both the growth lettuce plants and their resistance to short-term thermal stress which was made for the first time. The ability of strain B0021T to synthesize indole derivatives, siderophores, to solubilize insoluble phosphates was revealed. It was shown that inoculation of lettuce plants by strain B0021T improved of shoot growth and development, formation of the root system. It had a positive effect on the work of the photosynthetic apparatus, and also increased resistance to short-term temperature stress in vegetation experiments. The obtained results indicate the potential of using the studied strain to improve the yield of agricultural crops, as well as to protect plants from unfavorable environmental conditions.
Current issues in waste management in hot climate conditions
Authors: Shadimetov Yu Sh , Ayrapetov D A 
Published: December 2024

Abstract
The article discusses current issues of waste management in the hot climate of Central Asia. It notes that the development of industry, construction boom, rapid motorization, diversification and growth of agricultural production, combined with a hot climate, along with population growth and its migration to cities, affect the waste situation. At the same time, the region is becoming familiar with the concept of the “green” economy and welcomes the adoption of global experience, modern technologies, and progressive thinking. It emphasizes that waste management is a “complex system” consisting of interconnected parts, each of which can be both a driver and a barrier.
Study of using GIS technologies in forestry cadastre and monitoring for environmental sustainability
Authors: Khafizova Zulfiya , Mukhtarov Uzbekkhon , Nodira Khodjaeva 
Published: December 2024

Abstract
The integration of Geographic Information Systems (GIS) technologies in the forestry cadastre and monitoring practices in Uzbekistan represents a significant advancement in sustainable forest management. This study explores the application of GIS in enhancing the accuracy, efficiency, and comprehensiveness of forestry cadastre, which is crucial for the effective management, conservation, and restoration of forest resources in Uzbekistan. Through spatial analysis, remote sensing, and data integration, GIS technologies offer detailed insights into forest cover, land use changes, and biodiversity, providing a robust framework for decision-making and policy formulation. The research highlights how GIS tools facilitate the precise mapping of forest boundaries, monitoring of illegal logging activities, and assessment of reforestation efforts. Furthermore, the study examines the challenges and opportunities in implementing GIS in Uzbekistan’s forestry sector, considering the country’s unique geographical and ecological context. The findings suggest that adopting GIS technologies can significantly contribute to achieving Uzbekistan’s environmental sustainability goals and improving the management of its forestry resources.
Performance characteristics of rotary lobe pumps for high viscosity food medium
Authors: Akhmedova N A , Levicheva O I , Naumov V A 
Published: December 2024

Abstract
This paper analyses the effects of food media with high viscosity on the performance of rotary lobe pumps. Rotary lobe pumps have long been used in the food industry for pumping highly viscous media and are designed to operate for long periods of time without replacement of any parts. The study utilised publicly available data from factory tests of the PLP 3-4 pump for pumping food media of various viscosities μ (μ above 10,000 cP). The paper presents the results of processing these data, which allow us to draw some conclusions. It is established that the power input of the pump PLP 3-4, due to the viscosity of the food medium, is directly proportional to the rotor speed and increases with its increase. Thus the power spent on overcoming back pressure depends on rotor speed nonlinearly. At the same rotor speed the increase in pressure drop and dynamic viscosity coefficient do not affect the productivity, but lead to a significant increase in power consumption. The obtained results allow to draw a conclusion that it is not necessary to connect the increase of hydraulic efficiency of rotary lobe pump with improvement of energy efficiency of unit utilisation and to take into account the reason of increase of discharge pressure.
Influence of various organomineral biological preparations on the productivity and composition of the chlorophyll complex of spring wheat
Authors: Akhmetzhanov Daniel , Seregina Inga 
Published: December 2024

Abstract
In a field experiment, the influence of various organomineral biological products on the yield and composition of the chlorophyll complex of spring wheat was studied. As a result of research, it was found that organomineral complexes have a positive effect on increasing productivity. Special implementation options using OMC+Zn and OMC+Si. In addition, organomineral biological products have a significant impact on the composition and structure of the chlorophyll complex. To analyze the chlorophyll complex, two indicators were studied: the total content of chlorophylls a and b, and the ratio of chlorophylls a and b. The most optimal and effective in these two indicators was the option using OMC+Zn.