Results Of Research Research Articles

Ultra-high performance concrete with metal mine tailings and its properties: a review

Abstract Metal mine tailings (MMT) are a kind of industrial solid waste, with an increasing accumulation year by year, which has seriously damaged the ecological environment. Incorporating MMT in ultra-high performance concrete (UHPC) is an effective means to achieve green sustainable development, which can not only make wastes be resources and prevent pollution but also save raw material costs and reduce energy consumption. However, metal mine tailings contain complex and diverse metal oxides and other chemical substance and even contain certain radioactive elements and heavy metal ions. These factors can affect the corrosion resistance of UHPC, accelerate its aging and damage, and in addition may have serious impacts on the environment and human health. This paper summarizes the material properties of MMT and its application in UHPC; analyzes the effects of MMT as powder or fine aggregate on the workability, mechanical properties, durability, and leaching toxicity of UHPC; and elaborates the hydration products, interfacial transition zone, and pore structure of UHPC incorporating MMT (MMT-UHPC). Based on previous research results, the relationship between flowability, flexural strength, porosity, and compressive strength of MMT-UHPC is established.

Fresh agricultural products cold chain logistics distribution and path optimization

Based on the reference to the existing research results, combined with the enterprise's current distribution path, to minimize the cost as the research objective, to establish the relevant model, and put forward the control of logistics costs, increase the infrastructure investment in cold chain logistics, the optimization of the path of countermeasure proposals, to further improve the efficiency of the enterprise distribution and increase customer satisfaction at the same time reduces the cost of distribution, increase the core competitiveness of the industry.

Equivalence class of complete correlation determination of several gray incidence degrees

PurposeThis paper sets out to solve a common and crucial fundamental theoretical problem of gray incidence cluster analysis: to [X]={X|ρ(X,Y)≥1−ε0} constitute an approximate classification, it must first be proven that [X]={X|ρ(X,Y)=1} constitutes a rigorous classification.Design/methodology/approachThis paper does not study the concrete expressions of various incidence degrees but rather the perfect correlation essence of such incidence degrees, that is, sufficient and necessary conditions.FindingsFor any order difference incidence degree, the similarity incidence degree, the direct proportion incidence degree, the parallel incidence degree and the nearness incidence degree, it is proven that the perfect correlation relation is an equivalence relation. The set composed of all sequences Y that are equivalent to sequences X is studied, that is, the equivalence class of X. The structure and mutual relations of these equivalence classes are discussed, and the topological homeomorphism concept of incidence degree is introduced. The conclusion is obtained that the equivalence classes of the two incidence degrees must be the same when the topological homeomorphism is obtained.Research limitations/implicationsIn this paper, only the perfect correlation relation of any order difference incidence degree, the similarity incidence degree, the direct proportion incidence degree, the parallel incidence degree and the nearness incidence degree are studied as equivalent relations.Originality/valueNot only are the research results of several incidence degrees involved in this paper original but also many other effective incidence degrees have not done this basic research, so this paper opens up a research direction with theoretical significance.

Determinants of perceived benefits: cultural recognition, traditions and cultural linkages

PurposeThe present study addresses the literature gap on cultural linkages, traditions, cultural recognition and the perceived benefits of consumers in the orange economy. The article focuses on analyzing the impact of traditions and cultural linkages on the relationship between cultural recognition and the perceived benefits of consumers.Design/methodology/approachThe empirical study is conducted on a sample of 393 consumers from the city of Arequipa, Peru utilizing structural equation modeling (SEM) with Smart PLS software.FindingsThe research results demonstrate that traditions and cultural ties are important factors that entrepreneurs must consider in the production and marketing process to enhance the benefits perceived by consumers by providing cultural identity within the products.Originality/valueThe study provides theoretical implications that fill the existing gap in understanding the relationship between cultural recognition and perceived benefits. Additionally, it offers practical implications for the development of the cultural ecosystem, involving artisans, artists, cultural managers, entrepreneurs, businessmen, government authorities, non-governmental organizations and international organizations.

Surface Deformation Monitoring and Subsidence Mechanism Analysis in Beijing based on Time-series InSAR

Abstract. This article uses 43 Sentinel-1A image datasets covering Beijing to obtain time series surface deformation information in the study area from January 2022 to October 2023. It analyzes the causes of land subsidence by integrating precipitation and urban construction. The main research results are as follows: (1) Three distinct subsidence areas are identified in the eastern part of Chaoyang District in Beijing (Subsidence Area A), the northwestern part of Tongzhou District in Beijing (Subsidence Area B), and Yanjiao Town in Hebei Province (Subsidence Area B), which is adjacent to Beijing. Subsidence Areas A and B exhibit a dispersed pattern, with maximum land subsidence rates exceeding −30 mm/year. In contrast, Subsidence Areas C displays a funnel-shaped subsidence, where the majority of areas experience land subsidence rates exceeding −25 mm/year, with a maximum rate reaching −45 mm/year. (2) Precipitation has a significant impact on surface deformation in the study area, and there is a strong correlation between precipitation and land subsidence, with correlation values of 0.77, 0.77, and 0.74, respectively. (3) Urban construction has a certain impact on land subsidence, but the degree of impact varies in different regions.

Digital carbon neutrality: evidence of carbon emission reduction based on digital inclusive finance.

As a powerful engine for economic reform and curbing carbon emissions, digital inclusive finance provides solid support for achieving the goal of digital carbon neutrality. This study reveals the positive effect of digital inclusive finance on carbon emission reduction and the deeper reasons behind it by digging deeper into the panel data of 213 cities in China. The study adopts advanced empirical analysis methods to rigorously test the association between digital inclusive finance and carbon emissions. The results show that there is a strong positive correlation between the booming development of digital inclusive finance and the significant decline in carbon emissions. This finding remains solid after several rounds of robustness tests, which fully proves the reliability of the research results. Further mechanism analysis reveals the multiple paths of digital financial inclusion on carbon emission reduction. First, it promotes the optimization and upgrading of industrial structure by optimizing the allocation of financial resources, thus reducing the proportion of high-carbon emission industries. Second, digital inclusive finance attracts more foreign capital inflows and introduces advanced low-carbon technologies and management experience, further promoting the development of low-carbon economy. In addition, the study also found that the differences between different cities in terms of geographic location and city size have a significant impact on the carbon emission reduction effect of digital inclusive finance. In particular, the carbon emission reduction effect of digital inclusive finance is particularly significant in western regions, central cities, and first-tier cities. In response to these findings, this paper proposes a series of targeted policy recommendations. First, the financial service system should be further optimized to increase the coverage and penetration of digital inclusive finance, especially in less developed regions and small- and medium-sized cities. Second, regional policy synergies should be strengthened to form a strong synergy to promote the development of a low-carbon economy. In addition, it should guide capital flows to low-carbon industries and encourage enterprises to increase green technology research and development and application, while actively promoting low-carbon consumption concepts and guiding consumers to form green consumption habits. Through the implementation of these measures, it is expected that the potential of digital inclusive finance in the development of a low-carbon economy will be further stimulated, making a greater contribution to the realization of the goals of carbon peaking and carbon neutrality.

Study and Application of Rock Drilling Resistance Characteristics in the Jiyang Depression Formation

In response to the unclear drilling resistance characteristics of rocks in the Ji’yang Depression, low drilling efficiency of PDC drill bits, and difficulties in drill bit selection, this study selected rock samples from different depths in the area for indoor drilling resistance analysis testing. Based on logging data, a prediction model was established for drilling resistance characteristics parameters of the strata in the area, and a graph of drilling resistance characteristic parameters of the rocks in the area was drawn. The study showed that the uniaxial compressive strength of the strata rocks was 50–110 MPa, with a hardness of 500–1300 MPa, a plasticity coefficient ranging from 1 to 2, a rock drillability grade of 8–20, and an abrasiveness index of 5–20. Combining the analysis of on-site drilling bit failures, PDC drill bits adapted to the strata in the area were selected, and the mechanical drilling speed of the selected bits reached 12.58 m/h, successfully drilling through the target layer. The above research results are of guiding significance for understanding the reasons for the difficulty of drilling into the Jiyang Depression strata and for improving mechanical drilling speed and drill bit selection in this area.

Microscopic mechanism and effect analysis of polymer modifiers on embrittlement and viscosity behaviour of asphalt

To support the research and development of asphalt binder with low embrittlement point in cold areas, the microscopic mechanism and effect of polymer modifier on embrittlement and viscosity of asphalt were analysed by molecular dynamics method. The mixed molecular models of three polymer modified asphalt commonly used in cold areas and the interactive molecular models of each component of asphalt and modifier were established. The micromechanical properties of high-content polymer modified asphalt were studied by three important indices, namely brittleness point, shear viscosity and elastic modulus, and the interaction behaviour of each component of asphalt and modifier molecules was analysed by the layer model. The following conclusions were obtained: The brittleness point of modified asphalt can be decreased by increasing the polymer modifier content, with a notable reduction of 25.54 % observed when the content reaches 7.5 %. However, this is accompanied by a subsequent increase in shear viscosity at mixing temperatures, with the highest increase reaching 16.9 %. At low temperature environment, the diffusion rate of the modifier is closely related to its own type, temperature and the type of asphalt components, and in different modified asphalt, the law of the diffusion rate of each asphalt component is not completely consistent, so it is necessary to fully consider the influence of the proportion of asphalt components, and choose the modifier sensitive to the corresponding components. The above research results have an important guiding role in the scientific formulation of the design and test scheme of low-brittleness-point asphalt binder and the completion of the research and development of low-brittleness-point asphalt binder for cold areas.

Effects of train speed and passenger capacity on ground vibration of underground suburban railways

This study aims to explore the optimal driving speed for ground vibration in suburban railway underground sections. We focused on the ground surface of suburban railway underground sections and developed a 3D finite element dynamic coupling model for the tunnel–soil system. Subsequently, considering factors such as train speed and passenger load, we analyzed the propagation characteristics of ground vibration responses in urban railway underground sections. The research results indicate a significant amplification phenomenon in the peak power spectrum of measurement points near the tunnels in underground sections. The high-frequency components of the power spectrum between measurement points are noticeably higher between the two tunnels. Furthermore, as the train speed increases, this amplification phenomenon becomes more pronounced, and the power spectrum of each measurement point mainly concentrates on several frequency bands, with the amplitude of the power spectrum near the prominent frequencies also increasing. However, when the train speed is between 100 and 120 km/h, the impact on the amplitude of the power spectrum at measurement points above the running tunnel is minimal. Additionally, the amplitude of the middle-to-high frequency components in the power spectrum increases with the increase in passenger numbers. The impact on the peak acceleration amplitude at each measurement point is minimal when the train speed is 80 km/h or below. However, once the train speed exceeds 80 km/h, the peak acceleration amplitude above the running tunnel rapidly increases, reaching its maximum value at 113 km/h, and then gradually decreasing.

Influence of Higher Education E-Service Quality on E-Learning Student Satisfaction; As Moderated By Digital Literacy: A Mixed Method Research Approach

Introduction: This paper explores the impact of college e-service quality on student satisfaction in the context of the innovative practice of "Internet + Education" in order to research whether there is any difference in students' perception of college e-service quality under the influence of different levels of digital literacy. The research object of this paper is students of universities in Kunming, and the SERVQUAL model is extended. Among them, the independent variables are the five dimensions of e-service quality. The dependent variable is online education student satisfaction. The moderating variable is digital literacy. This research is based on relevant service theories. A combination of quantitative and qualitative methods is used. The results of the research show that the impact of service quality on college students' e-learning satisfaction is different under different levels of digital literacy. Objective: The research objective of this paper is to investigate the impact of the quality of e-services in higher education on student satisfaction in order to research whether there are differences in students' perceptions of the quality of e-services in higher education under the influence of different levels of digital literacy. Theoretical Framework: This research was expanded with the SERVQUAL model and followed the exploratory sequential mixed methods process of scientific investigation, from the initial selection of variables to the final discussion of recommendations and countermeasures. Method: In this study, the scientific survey process of exploratory sequential mixed methods was used to research the satisfaction of college students with online education based on the theory of digital literacy and service quality, using college students in Kunming, China, as the target of the survey, and a combination of quantitative and qualitative research methods. Results and Discussion: The results of the analysis showed that the independent variable: the five factors of e-services (the higher, the higher the satisfaction of students. And under the moderating variable, digital literacy moderated all the other factors, only the relationship between responsibility and e-learning student satisfaction had no significant moderating effect. [synthesize the main results of the research]. In the discussion section, these results will be correlated according to the theoretical framework, highlighting the identified effects and relationships. This section also considers possible limitations of the research. Research Implications: 1. theoretical significance: by constructing a comprehensive theoretical model, this research aims to provide new insights into the field of e-learning. It not only helps to understand the impact of E-learning platform design and service quality, but also emphasizes digital literacy as an important moderating variable. 2. Practical significance: The research results will provide value to educational technology developers and educational policy makers, helping them to optimize e-learning platforms to enhance user experience and learning outcomes. Originality/Value: This research expands the SERVQUAL model by taking online education as the background, combining the actual situation of online education in China, and taking digital literacy as the variable. It allows colleges and universities to break through the original traditional education model. And lifelong learning and personalized learning are the focus of the reform of continuing education in colleges and universities. The results of this research will promote colleges and universities to continuously improve the quality of online education and provide reference for schools and teachers to carry out online education and continuing education.

Influence of Financial Development on Environmental Quality: Research Results from Developing Countries

This study provides evidence supporting the hypothesis that financial development reduces environmental pollution in developing countries. using an annual dataset of carbon emissions, financial development, and other factors from 1990 to 2020, with the GMM approach, We find that the more developed the financial system, the more advantageous it is for the environment. This conclusion is strengthened when particular facets of financial development are taken into account. Moreover, the impact is also influenced by the countries' wealth levels, in which countries with high average incomes have financial development that has an impact on reducing environmental pollution and the opposite result when viewed. considered in low-middle-income countries. Finally, we offer some policy recommendations regarding financial development to enhance its efficacy in maintaining environmental quality.

Islamic Banking Performance and Internal Sharia Capital Collaboration

Objective: This study examines the impact of Internal Sharia Capitals, including Organization, Operational, Infrastructure and Spiritual to Collaboration Strategy. This objective is essential to explore whether the Sharia Capital from three companies has affected the collaboration strategy after merging. Another objective of this study is to analyze the collaboration strategy as a mediator in the relationship between Innovation and Business Performance. Research Method: This research used a quantitative method with structural equation modelling analysis. Data was collected from 300 Sharia bank executives throughout Indonesia. Data was processed using SmartPLS version 4.1.0 to analyze the hypotheses for this study. Research Result & Discussion: This research finds that Operational Sharia Capital impacted Collaboration Strategy significantly. Innovation and Collaboration Strategy significantly affected business performance. Strategic Collaboration also mediated the relationship between Innovation Strategy and Business Performance. This study provides crucial information on the importance of Operational Sharia capital in a newly merged Islamic financial industry. It is similar to other financial industries in that the organization needs strategic innovation to improve business performance. Additionally, our study found that having behavioral operation management, called Behavioral Operation, to follow strict rules like Sharia Law will affect Collaboration and increase the opportunity to have better business performance. Originality and Value: Sharia capital is internal capital in Islamic Financial Industry. Based on result of study and exploring previous studies about this capital, Authors can conclude that this industry need strong operational capital, Innovation and Collaboration Strategy to have impact in business performance. The other value of this study is an interesting result of new merging sharia bank need to focus on operational and ensure it comply with Sharia rules.

The Role of Environmental Management Accounting in Mediating Green Innovation to Firm Value: Moderated by Quality Management

Firm value is an important indicator for increasing the competitiveness of a company amidst very tight business competition. This research aims to obtain empirical evidence regarding the influence of Green Innovation on Firm Value which is mediated Environmental Management Accounting and moderated by Quality Management. The companies that are the object of this research are manufacturing companies listed on the Indonesia Stock Exchange (BEI) for the 2020-2022 period. The sampling technique in this research used a purposive sampling method and obtained 65 companies. The multicollinearity test and heteroscedasticity test are used as classical assumption tests. Eviews 12 software with panel data regression analysis was used to test the hypothesis. Based on the research results, it was found that green innovation, environmental management accounting, green innovation have an influence on Firm Value, environmental management accounting has an influence in mediating the relationship between green innovation and Firm Value and quality management can moderate the relationship between green innovation and Firm Value.

Use of measurement results from a mobile laboratory in the diagnostics of anthropogenic environment - linear ordering of objects using the TOPSIS method

The measurements of the concentrations of gaseous and dust pollutants in the anthropogenic environment are an important element of environmental monitoring and for determining directions of preventive activities in the field of health protection. The article presents the results involving the concentrations of suspended dust and gaseous pollutants in the outdoor air, which were recorded at three measuring stations of air quality in the Silesian and Opole voivodeships (Wodzisław Śląski, Zabrze, Kędzierzyn-Koźle). The results were supplemented with the values recorded by the mobile laboratory located at the Center for Continuing Education - Branch of the Silesian University of Technology in Rybnik. The research results were used for a synthetic assessment of the threat level to the anthropogenic environment. In the computational layer, the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) was employed, which is included in the group of methods for solving multi-criteria decision-making problems (Multi Attribute Decision Making).

Waveform Complexity and Positioning Analysis of Acoustic Emission Events during the Compression Failure Process of a Rock Burst Prone Sample

The localization results of acoustic emission (AE) events can reflect the location and pattern of burst-prone rock failures. However, event localization heavily depends on the quality of the original waveform of the sensor. Therefore, this study analyzed the AE waveform of a rock sample under compression to evaluate its failure localization and quality. From the research results, it could be seen that the initial failure was relatively calm, with clear take-off points, which can be better used for accurate AE event positioning. However, the later failure was severe, causing the take-off points of most sensors to be very unclear, and positioning methods that rely on take-off points cannot be used for positioning, let alone simply using the positioning results of the built-in software. This research result reminds researchers who use AE signals for event localization to first examine the quality and status of the original waveform, providing a basis for obtaining accurate localization results, in order to further accurately study the subsequent failure patterns. The above facts indicate that the initial failure is small and scattered, while the later failure is large and concentrated, with certain fractal characteristics.

Islamic Educational Psychology: The Urgency In Islamic Religious Education Learning

This research aims to reveal the important role of Islamic educational psychology in the Islamic Religious Education learning process. The method used is library research which involves collecting information and data by utilizing various materials available in the library, such as reference books, articles, journals and other relevant documents related to the topic being researched. From the research results, it is concluded that Islamic educational psychology plays an important role in learning Islamic religious education because of the interactive dynamics between teachers and students during the learning process. Without the knowledge of Islamic educational psychology in every learning process, it is certain that learning objectives will not be achieved optimally and the learning process will be ineffective. Furthermore, Islamic religious education involves instilling and strengthening the principles of faith which serve as a spiritual basis. A person's entire being is shaped by the teachings of the Islamic religion, and every attitude and behavior is influenced by his faith.

Study on mechanical properties and bearing capacity calculation of eccentric compression of RC columns reinforced with prestressed lattice steel

The external steel structure and RC column under eccentric compression have a reduced ability to work together, and using prestressing technology can significantly improve their ability to work together. Therefore, the paper proposes a new prestressed column reinforcement technology by adopting a space profile steel structure instead of angle steel and combining prestressing technology with the bolted connection. By conducting eccentric compression test studies on 11 specimens with different reinforcement methods, prestressing and eccentricity, load-displacement curves, stress distribution laws, ultimate bearing capacity, damage modes and prestressing influence rules were obtained. The main conclusions are as follows: prestressing can significantly improve the ability of external reinforcement steel structure and core column to work together and inhibit the development of concrete cracks. Compared with the traditional angle steel reinforcement, the bearing capacity is increased by 17.5 %, the stiffness is increased by 26.6 %, and the ductility is increased by 12.3 %. However, the reinforcement effect will be reduced if the prestressing is too large. It is recommended that the prestressing should be applied according to the size of 0.09 fc of the unilateral area of the core column. According to the prestressed lattice steel constraint mechanism, a mechanical analysis model of the reinforced member was established. Finally, based on the cross-section equilibrium method, a calculation method of eccentric compressive ultimate bearing capacity was proposed, and the research results can provide a basis for the engineering application of the new reinforcement method.

The Influence of Work Discipline and Work Environment on the Work Performance of Inpatient Nurses at Bhayangkara Hospital, Pontianak

This study aims to reveal the influence of work discipline and work environment on the work performance of inpatient nurses at Bhayangkara Hospital, Pontianak. The research design used was non-experimental and used cross-sectional analytics. Data analysis using Logistic Regression. Research data was obtained from valid and reliable research instruments. The population in this study were all inpatient nurses. The research sample was 46 inpatient nurses. Research Results: 1) regression analysis of the influence of work discipline on nurses' work performance, p-value < 0.05, thus there is an influence of work discipline on work performance; 2) the Odds Ratio value is 4.582, meaning that nurses with high work discipline have a 4.582 times chance of having good work performance compared to nurses who have low work discipline; 3) the influence of the work environment on the work performance of nurses obtained p value <0.05. Thus there is an influence of the work environment on the work performance of inpatient nurses; 4) the Odds Ratio value is 2.924, meaning that nurses with a good work environment have a 2.924 times chance of having good work performance compared to nurses who have a poor work environment; 5) The R-Square value is 0.722, meaning that the influence of work discipline and work environment on the work performance of inpatient nurses is 72.2%.

The Effect of Leverage and Tax Risk on Company Value with Company Size as A Moderating Variable

This research aims to examine the influence of leverage and tax risk on company value with company size as a moderating variable. The sample in this research is manufacturing companies listed on the Indonesia Stock Exchange in the 2017-2022 period. The research method uses quantitative methods with secondary data. Determining the research sample used purposive sampling and observation data based on certain criteria. The data in this study was analyzed using Partial Least Square (PLS) with the help of smartPLS software. The results of previous research show that leverage has a positive and significant effect on firm value and tax risk has a significant negative effect on firm value, and company size strengthens the relationship between leverage and tax risk on firm value. This research is expected to provide an overview of leverage, tax risk and company value in Indonesia so that it can contribute to company decision making and act as information in the context of drafting laws and regulations.

SUBSTANTIATION OF THE CERTIFICATE PROGRAM «GLOBAL HEALTH» AS A COMPONENT OF THE TRAINING OF PUBLIC HEALTH SPECIALISTS

The aim: to develop a modern certification program "Global Health" for the continuous professional development of public health professionals. Materials and methods. The study employed bibliosemantic, informational-analytical, medical-statistical, sociological methods, and content analysis method. The research program included an analysis of the main competencies of public health professionals, as defined by the Association of Schools of Public Health in the European Region (ASPHER) and the higher education standard for specialty 229 "Public Health" for the second (master's) level of higher education; analysis of existing certification programs on global health; conducting sociological surveys of public health professionals regarding priority topics and preferred learning methods. The research was based on normative documents, electronic resources, and the results of sociological research. Statistical processing and mathematical analysis of materials were conducted using statistical analysis methods. Results. It was established that global health issues are significant in shaping the professional competencies of public health professionals, considering the requirements of the higher education standard for specialty 229 "Public Health" for the second (master's) level of higher education and those, defined by the European List of Core Competencies for Public Health Professionals ASPHER. The study of these issues was identified as important for continuous professional development based on sociological surveys of disease control and prevention center employees (38.4 out of 100 respondents). Among various forms of education, webinars (62.2±3.8 out of 100 respondents) and online learning (60.4±3.8) are most in demand. Analysis of the obtained data led to the justification of the "Global Health" certification program. In the developed "Global Health" certification program, 26.7% of the workload corresponds to lectures, 33.3% to practical classes, and 40% to preparatory work. Structurally, it covers 2 modules and 8 topics on current issues of the impact of globalization on health and analysis of global health indicators. Conclusions. The "Global Health" certification program meets the requirements of normative documents, considers contemporary challenges and consequences of globalization on health, highlights global health trends, and its topics are in demand among disease control and prevention center professionals.