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Ethics of Human Resources Management in the Cameroonian Health System, Medical Nomadism and the Ineffectiveness of the Fight against High Blood Pressure
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作者 Jean Ndibi Abanda Anicet Onana Akoa +2 位作者 Désiré Tchoffo Ulrich Dama Pierre Yassa Yoniene 《Health》 2024年第1期9-21,共13页
Context/objectives: The fight against Chronic Non-Communicable Diseases (NCDs) is a long-term undertaking, which requires available, motivated and well-managed human resources (HR). The administrative management of sk... Context/objectives: The fight against Chronic Non-Communicable Diseases (NCDs) is a long-term undertaking, which requires available, motivated and well-managed human resources (HR). The administrative management of skills on both qualitative and quantitative levels is one of the essential functions of a health system. To better implement policies of fight against High Blood Pressure (HBP) and other chronic diseases, it is important to establish strategies to retain health personnel. This loyalty requires favorable working conditions and consideration of the contribution-reward couple. Good working conditions are likely to reduce the phenomenon of medical nomadism;conversely, poor HR management can contribute to their exodus towards exotic “green pastures”, thus leading to an additional crisis in the Cameroonian health system. The fight against HBP is a complex, multifaceted and multifactorial reality that requires appropriate management model for all types of resources mainly HR. The main objective of this research is to show the impact of poor management of human resources in Cameroon health system on medical nomadism and the ineffectiveness of the fight against High Blood Pressure. Method: A cross-sectional descriptive survey among five hundred (500) health facilities in the center region of Cameroon has been conducted. A stratified probabilistic technique has been used, and the number of health facilities to be surveyed has been determined using the “sample size estimation table” of Depelteau. The physical questionnaires have been printed and then distributed to data collectors. After data collection, the latter were grouped during processing in Excel sheets. The Chi-square test was used for data with a qualitative value and that of Kolmogorov-Sminorf for data with a quantitative value to assess the normality and reliability of data. The Crochach’s Alpha reliability test allowed us to have a summary of the means and variances and then to search for intragroup correlations between variables. Descriptive analysis was possible with the XLSTAT 2016 software. Results: 43.60% of Health Facilities (HF) managers were unqualified. 82.20% of HF managers have staff in a situation of professional insecurity. They are mainly contractual (49.00), decision-making agents (24.40%), casual agents (08.80). The proportion of unstable personnel is average of 22.00% and very unstable, 12.00%. 展开更多
关键词 ethics Human Resources Management Cameroonian Health System Medical Nomadism Ineffectiveness High Blood Pressure
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Exploring the intersection of the medical metaverse and healthcare ethics:future considerations and caveats
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作者 Colm McCourt 《Global Health Journal》 2024年第1期36-40,共5页
The medical metaverse and digital twin are set to revolutionise healthcare.Like all emerging technologies their benefits must be weighed against their ethical and social,impacts.If we consider the advances of medical ... The medical metaverse and digital twin are set to revolutionise healthcare.Like all emerging technologies their benefits must be weighed against their ethical and social,impacts.If we consider the advances of medical technology as an expression of our values,such as the pursuit of knowledge,cures and healing,an ethical study allows us to align our values and steer the technology towards an agreed goal.However,to appreciate the long-term consequents of a technology,those consequences must be considered in the context of a society already shaped by that technology.This paper identifies the technologies currently shaping society and considers the ethical,and social consequences of the medical metaverse and digital twin in that future society. 展开更多
关键词 Web 3 Metaverse Digital twin MEDICINE Healthcare ethics Blockchain
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The Ethical Choice of Business English Interpreters under Chesterman’s Model of Translation Ethics
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作者 HUANG Li-hua 《Journal of Literature and Art Studies》 2024年第9期808-814,共7页
This paper explores the ethical challenges encountered by business English interpreters using Chesterman’s Model of Translation Ethics,set against the context of economic globalization and the“Belt and Road”initiat... This paper explores the ethical challenges encountered by business English interpreters using Chesterman’s Model of Translation Ethics,set against the context of economic globalization and the“Belt and Road”initiative.With the increasing demand for interpreters,the paper delves into the ongoing discussion about the role of AI in translation and its limitations,especially concerning cultural subtleties and ethical issues.It highlights the importance of human interpreters’cross-cultural understanding and the ethical principles that inform their work,such as the Ethics of Representation,Service,Communication,Norm-based Ethics,and Commitment.Moreover,the paper examines how these ethical models are applied in practical business situations,including business banquets,business negotiations,business talks and business visits,etc.,and investigates the cultural misunderstandings that may occur during these interactions.The study concludes that although AI provides efficiency and cost savings,human interpreters are essential for their capacity to handle the intricacies of cross-cultural communication with cultural awareness and ethical discernment. 展开更多
关键词 CHESTERMAN translation ethics model ethical choice business English interpreters
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The Role of Ethics in Library and Information Practice
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作者 Emanuel Orban 《Cultural and Religious Studies》 2024年第10期616-623,共8页
Applied ethics finds application in all spheres of social life,one of which is the field of library and information science.Ethics is an important pillar contributing to the systematic order of the library and its col... Applied ethics finds application in all spheres of social life,one of which is the field of library and information science.Ethics is an important pillar contributing to the systematic order of the library and its collection.Ethical principles are contained in key documents such as the Librarian’s Code of Ethics,partly in the Library(Lending)Regulations,and should therefore be adopted by every member of staff.The library profession consists not only of working with information,namely making it available,but also of setting up effective communication towards users(readers)in the form of defining optimal solutions eliminating the problems that arise.The aim of our efforts is to capture the most common problems that arise from misunderstandings between librarian and user(reader)and to make clear what specific role ethical values play in library and information practice. 展开更多
关键词 ethics LIBRARIANSHIP COMMUNICATION INFORMATION management
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Designing a medical ethics curriculum in ophthalmology
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作者 Matthew D.Gearinger 《Annals of Eye Science》 2024年第1期4-9,共6页
Ethical principles form a bedrock to medical practice in any specialty,guiding physicians to appropriate attitudes and behaviors.A formal ethics curriculum can be difficult to generate de novo in an ophthalmology trai... Ethical principles form a bedrock to medical practice in any specialty,guiding physicians to appropriate attitudes and behaviors.A formal ethics curriculum can be difficult to generate de novo in an ophthalmology training program.A number of barriers exist in most ophthalmology departments:trainees may think ethics is of secondary importance compared to core basic and clinical science topics;most ophthalmology faculty have no formal degree in medical ethics;there is limited didactic time with competing academic,clinical,and surgical priorities;work-hours regulations may limit the time available to deliver“para-professional”lectures;and there is a belief that the medical ethics lectures during medical school is a sufficient amount of coursework to last through a physician’s career with no need for continuing professional development.The four pillars of medical ethics are beneficence,non-maleficence,autonomy,and justice.In addition,morals,ethics,and professionalism are important aspects of sound medical practice.A curriculum specific to medical ethics in ophthalmology can be developed in any of our sub-specialties and include lectures,curated readings,case rounds,and clinic wrap-up sessions.Ethical considerations are part of everyday clinical practice,and a structured ethics curriculum can be incorporated into ophthalmology training programs.The concept of backward design can be used to structure the curriculum,starting with the expected outcome,then designing authentic assessments,and finally putting together a learning plan that has students actively involved in ethical discussions.This paper will provide a guide to developing an ethics curriculum for an ophthalmology training program utilizing the concept of backwards design and guide the reader through the process of developing expected learning outcomes,authentic assessments,and a unified learning plan. 展开更多
关键词 Medical ethics curriculum design medical education
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On Evaluating University Teachers’ Morality and Ethics in the New Era
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作者 LIU Qiu-fen 《Journal of Literature and Art Studies》 2024年第1期92-94,共3页
University teachers play an important role in promoting moral and political education among university students.Regular and long-term construction of teachers’morality and ethics will contribute to the success of the... University teachers play an important role in promoting moral and political education among university students.Regular and long-term construction of teachers’morality and ethics will contribute to the success of the fundamental task of cultivating talents.The present study proposes that due to the multiple identities of university teachers,it is necessary to evaluate the construction of teachers’morality and ethics in terms of what to evaluate and how to evaluate?It is expected that the attempt will provide useful guidance for the construction of university teachers’morality and ethics. 展开更多
关键词 university teachers morality and ethics construction EVALUATION
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The Value and Realization Strategy of Teacher Ethics Construction in Colleges and Universities under the Perspective of“Cultivating People by Virtue”
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作者 LI Dan 《Journal of Literature and Art Studies》 2024年第8期741-747,共7页
“Cultivating people by virtue”has become the foundation of China’s education,and is the top priority of college education.“Only the learned can become teachers,and only those who behave properly can become role mo... “Cultivating people by virtue”has become the foundation of China’s education,and is the top priority of college education.“Only the learned can become teachers,and only those who behave properly can become role models”.The construction of teachers’ethics in colleges and universities is the premise of realizing the fundamental task of moral education,the need of teachers,the key to realizing the great rejuvenation of the Chinese nation,and it is also the way to correct the bad atmosphere in colleges and universities.In the construction of teachers’ethics,teachers should understand their roles and improve their professional ethics,schools should improve the guarantee system of teachers’ethics construction,meanwhile,improve the status of teachers and create a social environment of respecting teachers and valuing teachers. 展开更多
关键词 cultivating people by virtue teacher ethics colleges and universities
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Levinas on the Ethics of the Other
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作者 HU Lijun PU Jingxin 《Philosophy Study》 2024年第1期16-21,共6页
The traditional mainstream of political philosophy establishes its thoughts on the subjectivity of“I”,which also formats its ethics of justice and freedom on the ground of selfness for itself and by itself.Political... The traditional mainstream of political philosophy establishes its thoughts on the subjectivity of“I”,which also formats its ethics of justice and freedom on the ground of selfness for itself and by itself.Political philosophers also incline to generalize and neutralize in labelling persons into the abstract concepts which ignore their particularity and diversity;as a result,this led to devastative consequence politically for the other,and also jeopardized the“I”.Hence Emmanuel Levinas provides his solution to this dilemma in an attempt to put the ethics of justice on the ground of the other.Justice for the other is the starting point for the political ethics.The other is the absolute infinity which cannot be encompassed by any conceptual generalization.It is otherness of the other that actually constitutes the selfness of“I”.The freedom of the other guarantees the freedom of“I”.Human being is initially ethical being.Justice for the other is the real foundation in securing justice for“I”.This mutual horizon of the other and I has primitive implication for the genuine ethics. 展开更多
关键词 the other I JUSTICE FREEDOM ethics
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Recognition of Ethics and Sustainability:A Case Study of Coca-Cola
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作者 Tianfu Wang 《Proceedings of Business and Economic Studies》 2024年第2期73-78,共6页
Corporate ethics and sustainable development are receiving increasing attention in today’s society.More and more companies are realizing that ethical and sustainable development is not only a requirement for fulfilli... Corporate ethics and sustainable development are receiving increasing attention in today’s society.More and more companies are realizing that ethical and sustainable development is not only a requirement for fulfilling social responsibility but also a key factor for achieving long-term growth and sustainable competitive advantage.As a result,companies are integrating ethics and sustainability into their strategies,decisions,and operations to achieve both business success and social benefit.However,some companies shout sustainability and environmental protection slogans;the actual practice differs from the claim.This paper combined the planning and actual data of the Coca-Cola Company and found that the Coca-Cola Company was suspected of greenwashing.While Coca-Cola does contribute to the environment,there is a difference between what it does and what it says.As for the possibility of this problem,the article also makes a relative solution and assessment. 展开更多
关键词 COCA-COLA ethics SUSTAINABILITY GREENWASHING
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Hierarchical Media Ethics in the Digital Age: An Analysis of the “Primary School Student Lost Homework in Paris” Incident
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作者 ZHAO Yifei 《Journalism and Mass Communication》 2024年第3期205-208,共4页
In the digital age,traditional media ethics norms lack sufficient explanatory power and binding force in practice.This paper uses the“Primary School Student Lost Homework in Paris”incident as a case study to explore... In the digital age,traditional media ethics norms lack sufficient explanatory power and binding force in practice.This paper uses the“Primary School Student Lost Homework in Paris”incident as a case study to explore the ethical controversies surrounding the dissemination of this event.By adopting a hierarchical media ethics perspective,the paper dynamically examines the ethical conduct of various communicators,elucidates the ethical responsibilities of each party involved,and reveals the complexity of communication ethics in the digital age. 展开更多
关键词 media ethics information dissemination self-media ethics norms “Primary School Student Lost Homework in Paris”
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Exploring the Long-Term Mechanism of the Construction of College Teachers’Ethics in the New Era Under the Concept of“Sanquan Education”
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作者 Jing Zuo Xiaoyue Liu 《Journal of Contemporary Educational Research》 2024年第1期140-146,共7页
This paper takes the long-term mechanism exploration of the construction of teachers’ethics in the new era under the concept of“Sanquan education,”aiming to explore how to establish a long-term mechanism of the con... This paper takes the long-term mechanism exploration of the construction of teachers’ethics in the new era under the concept of“Sanquan education,”aiming to explore how to establish a long-term mechanism of the construction to meet the needs of college education development under the background of the new era.A series of targeted measures and suggestions are put forward,including improving the system and mechanism,strengthening the education and training of teachers’ethics,and establishing the evaluation and assessment mechanism.The implementation of these measures can promote the formation of the long-term mechanism of the construction of teachers’ethics in colleges and universities,improve teachers’ethics and behavior quality,and provide strong support for the development of education in colleges and universities. 展开更多
关键词 Sanquan education ethics College education Long-term mechanism Teacher quality
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The Price of Engineering Ethics, a Personal Story
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作者 Robert A.Leishear 《Philosophy Study》 2024年第1期22-29,共8页
There are costs for doing the right thing,but regret is not one of those costs.I learned this lesson the hard way throughout a 42-year engineering career.As a young engineer,raising a family,I was more adaptable to ma... There are costs for doing the right thing,but regret is not one of those costs.I learned this lesson the hard way throughout a 42-year engineering career.As a young engineer,raising a family,I was more adaptable to management mandates,i.e.,I was more willing to be unethical to keep my job to make money and have health insurance for my family.As I grew in age,experience,and stamina,I was less adaptable,i.e.,I was more ethical.This article tells this story through events at various times in my engineering career1.Ethics define how we do the right thing. 展开更多
关键词 Engineering ethics Fukushima explosions Three Mile Island explosions Piper Alpha explosions San Bruno explosion Hamaoka explosion I-40 bridge crack nuclear waste
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Ethical-GPT:一种面向人工智能伦理教育的垂类GPT工具设计与实现
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作者 王佑镁 王京京 +1 位作者 张思宇 柳晨晨 《现代教育技术》 CSSCI 2024年第11期27-35,共9页
人工智能技术在推动教育变革的同时,也引发了诸如隐私泄露、技术滥用等伦理风险挑战,使得加强人工智能伦理教育势在必行。同时,当前教育人工智能伦理建设过程中存在的学习资源稀缺、教学方式单一、缺乏实质性的伦理实践等问题也亟待解... 人工智能技术在推动教育变革的同时,也引发了诸如隐私泄露、技术滥用等伦理风险挑战,使得加强人工智能伦理教育势在必行。同时,当前教育人工智能伦理建设过程中存在的学习资源稀缺、教学方式单一、缺乏实质性的伦理实践等问题也亟待解决。对此,文章首先采用“大语言模型微调+本地知识库”的技术路线,设计了面向人工智能伦理教育的垂类GPT工具——Ethical-GPT,并介绍了Ethical-GPT的基础问答、案例学习、情境模拟、智能测验四大功能模块;之后,文章从大模型选取、本地知识库建设、高效模型微调等方面重点阐述了Ethical-GPT的技术实现,并通过对比不同模型的回答结果进行了模型效果分析,发现Ethical-GPT具有良好的专业问答能力,并且能够随机生成并呈现多样化的伦理案例;最后,文章深入探讨了Ethical-GPT的教育应用场景。文章设计的Ethical-GPT不仅为人工智能伦理的教育实践提供了工具支持,也为推动教育领域专用大语言模型的构建提供了参考思路。 展开更多
关键词 ethical-GPT 教育人工智能 伦理教育 大语言模型
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Perspectives from a publishing ethics and research integrity team for required improvements 被引量:1
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作者 Sabina Alam Laura Wilson 《Journal of Data and Information Science》 CSCD 2023年第3期1-14,共14页
It is imperative that all stakeholders within the research ecosystem take responsibility to improve research integrity and reliability of published research.Based on the unique experiences of a specialist publishing e... It is imperative that all stakeholders within the research ecosystem take responsibility to improve research integrity and reliability of published research.Based on the unique experiences of a specialist publishing ethics and research integrity team within a major publisher,this article provides insights into the observed trends of misconduct and how those have evolved over time,and addresses key actions needed to improve the interface between researchers,funders,institutions and publishers to collectively improve research integrity on a global scale. 展开更多
关键词 Research integrity Publishing ethics Training Education
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Insights on advanced substrates for controllable fabrication of photoanodes toward efficient and stable photoelectrochemical water splitting 被引量:2
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作者 Huilin Hou Gang Shao +2 位作者 Yang Wang Wai‐Yeung Wong Weiyou Yang 《Carbon Energy》 SCIE EI CAS CSCD 2024年第4期164-221,共58页
Conversion of solar energy into H_(2) by photoelectrochemical(PEC)water splitting is recognized as an ideal way to address the growing energy crisis and environmental issues.In a typical PEC cell,the construction of p... Conversion of solar energy into H_(2) by photoelectrochemical(PEC)water splitting is recognized as an ideal way to address the growing energy crisis and environmental issues.In a typical PEC cell,the construction of photoanodes is crucial to guarantee the high efficiency and stability of PEC reactions,which fundamentally rely on rationally designed semiconductors(as the active materials)and substrates(as the current collectors).In this review work,we start with a brief introduction of the roles of substrates in the PEC process.Then,we provide a systematic overview of representative strategies for the controlled fabrication of photoanodes on rationally designed substrates,including conductive glass,metal,sapphire,silicon,silicon carbide,and flexible substrates.Finally,some prospects concerning the challenges and research directions in this area are proposed. 展开更多
关键词 hydrogen PHOTOANODE PHOTOELECTROCHEMICAL SUBSTRATES water splitting
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Development of advanced anion exchange membrane from the view of the performance of water electrolysis cell 被引量:2
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作者 Chao Liu Zhen Geng +6 位作者 Xukang Wang Wendong Liu Yuwei Wang Qihan Xia Wenbo Li Liming Jin Cunman Zhang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第3期348-369,I0009,共23页
Green hydrogen produced by water electrolysis combined with renewable energy is a promising alternative to fossil fuels due to its high energy density with zero-carbon emissions.Among water electrolysis technologies,t... Green hydrogen produced by water electrolysis combined with renewable energy is a promising alternative to fossil fuels due to its high energy density with zero-carbon emissions.Among water electrolysis technologies,the anion exchange membrane(AEM) water electrolysis has gained intensive attention and is considered as the next-generation emerging technology due to its potential advantages,such as the use of low-cost non-noble metal catalysts,the relatively mature stack assembly process,etc.However,the AEM water electrolyzer is still in the early development stage of the kW-level stack,which is mainly attributed to severe performance decay caused by the core component,i.e.,AEM.Here,the review comprehensively presents the recent progress of advanced AEM from the view of the performance of water electrolysis cells.Herein,fundamental principles and critical components of AEM water electrolyzers are introduced,and work conditions of AEM water electrolyzers and AEM performance improvement strategies are discussed.The challenges and perspectives are also analyzed. 展开更多
关键词 HYDROGEN water electrolysis Anion exchange membrane Electrolysis cell
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Inter-layer interference for multi-layered tight gas reservoir in the absence and presence of movable water 被引量:2
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作者 Tao Zhang Bin-Rui Wang +5 位作者 Yu-Long Zhao Lie-Hui Zhang Xiang-Yang Qiao Lei Zhang Jing-Jing Guo Hung Vo Thanh 《Petroleum Science》 SCIE EI CAS CSCD 2024年第3期1751-1764,共14页
Due to the dissimilarity among different producing layers,the influences of inter-layer interference on the production performance of a multi-layer gas reservoir are possible.However,systematic studies of inter-layer ... Due to the dissimilarity among different producing layers,the influences of inter-layer interference on the production performance of a multi-layer gas reservoir are possible.However,systematic studies of inter-layer interference for tight gas reservoirs are really limited,especially for those reservoirs in the presence of water.In this work,five types of possible inter-layer interferences,including both absence and presence of water,are identified for commingled production of tight gas reservoirs.Subsequently,a series of reservoir-scale and pore-scale numerical simulations are conducted to quantify the degree of influence of each type of interference.Consistent field evidence from the Yan'an tight gas reservoir(Ordos Basin,China)is found to support the simulation results.Additionally,suggestions are proposed to mitigate the potential inter-layer interferences.The results indicate that,in the absence of water,commingled production is favorable in two situations:when there is a difference in physical properties and when there is a difference in the pressure system of each layer.For reservoirs with a multi-pressure system,the backflow phenomenon,which significantly influences the production performance,only occurs under extreme conditions(such as very low production rates or well shut-in periods).When water is introduced into the multi-layer system,inter-layer interference becomes nearly inevitable.Perforating both the gas-rich layer and water-rich layer for commingled production is not desirable,as it can trigger water invasion from the water-rich layer into the gas-rich layer.The gas-rich layer might also be interfered with by water from the neighboring unperforated water-rich layer,where the water might break the barrier(eg weak joint surface,cement in fractures)between the two layers and migrate into the gas-rich layer.Additionally,the gas-rich layer could possibly be interfered with by water that accumulates at the bottom of the wellbore due to gravitational differentiation during shut-in operations. 展开更多
关键词 Tight gas Comingled production INTERFERENCE Two-phase flow water blocking
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A study on the simulation of carbon and water fluxes of Dangxiong alpine meadow and its response to climate change 被引量:1
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作者 Lingyun He Lei Zhong +3 位作者 Yaoming Ma Yuting Qi Jie Liu Peizhen Li 《Atmospheric and Oceanic Science Letters》 CSCD 2024年第5期22-27,共6页
The alpine meadow ecosystem accounts for 27%of the total area of the Tibetan Plateau and is also one of the most important vegetation types.The Dangxiong alpine meadow ecosystem,located in the south-central part of th... The alpine meadow ecosystem accounts for 27%of the total area of the Tibetan Plateau and is also one of the most important vegetation types.The Dangxiong alpine meadow ecosystem,located in the south-central part of the Tibetan Plateau,is a typical example.To understand the carbon and water fluxes,water use efficiency(WUE),and their responses to future climate change for the alpine meadow ecosystem in the Dangxiong area,two parameter estimation methods,the Model-independent Parameter Estimation(PEST)and the Dynamic Dimensions Search(DDS),were used to optimize the Biome-BGC model.Then,the gross primary productivity(GPP)and evapotranspiration(ET)were simulated.The results show that the DDS parameter calibration method has a better performance.The annual GPP and ET show an increasing trend,while the WUE shows a decreasing trend.Meanwhile,ET and GPP reach their peaks in July and August,respectively,and WUE shows a“dual-peak”pattern,reaching peaks in May and November.Furthermore,according to the simulation results for the next nearly 100 years,the ensemble average GPP and ET exhibit a significant increasing trend,and the growth rate under the SSP5–8.5 scenario is greater than that under the SSP2–4.5 scenario.WUE shows an increasing trend under the SSP2–4.5 scenario and a significant increasing trend under the SSP5–8.5 scenario.This study has important scientific significance for carbon and water cycle prediction and vegetation ecological protection on the Tibetan Plateau. 展开更多
关键词 Carbon and water flux water use efficiency Alpine meadow Biome-BGC model Climate change
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Influence of water coupling coefficient on the blasting effect of red sandstone specimens 被引量:2
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作者 Yang Li Renshu Yang +1 位作者 Yanbing Wang Dairui Fu 《International Journal of Coal Science & Technology》 EI CAS CSCD 2024年第1期148-166,共19页
This study investigates the impact of different water coupling coefficients on the blasting effect of red sandstone.The analysis is based on the theories of detonation wave and elastic wave,focusing on the variation i... This study investigates the impact of different water coupling coefficients on the blasting effect of red sandstone.The analysis is based on the theories of detonation wave and elastic wave,focusing on the variation in wall pressure of the blasting holes.Using DDNP explosive as the explosive load,blasting tests were conducted on red sandstone specimens with four different water coupling coefficients:1.20,1.33,1.50,and 2.00.The study examines the morphologies of the rock specimens after blasting under these different water coupling coefficients.Additionally,the fractal dimensions of the surface cracks resulting from the blasting were calculated to provide a quantitative evaluation of the extent of rock damage.CT scanning and 3D reconstruction were performed on the post-blasting specimens to visually depict the extent of damage and fractures within the rock.Additionally,the volume fractal dimension and damage degree of the post-blasting specimens are calculated.The findings are then combined with numerical simulation to facilitate auxiliary analysis.The results demonstrate that an increase in the water coupling coefficient leads to a reduction in the peak pressure on the hole wall and the crushing zone,enabling more of the explosion energy to be utilized for crack propagation following the explosion.The specimens exhibited distinct failure patterns,resulting in corresponding changes in fractal dimensions.The simulated pore wall pressure–time curve validated the derived theoretical results,whereas the stress cloud map and explosion energy-time curve demonstrated the buffering effect of the water medium.As the water coupling coefficient increases,the buffering effect of the water medium becomes increasingly prominent. 展开更多
关键词 water coupling coefficient Radial uncoupled charge Numerical simulation Fractal dimension
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Experimental study on the effect of water absorption level on rockburst occurrence of sandstone 被引量:1
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作者 Dongqiao Liu Jie Sun +3 位作者 Pengfei He Manchao He Binghao Cao Yuanyuan Yang 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2024年第1期136-152,共17页
To investigate the mechanism of rockburst prevention by spraying water onto the surrounding rocks,15 experiments are performed considering different water absorption levels on a single face.High-speed photography and ... To investigate the mechanism of rockburst prevention by spraying water onto the surrounding rocks,15 experiments are performed considering different water absorption levels on a single face.High-speed photography and acoustic emission(AE)system are used to monitor the rockburst process.The effect of water on sandstone rockburst and the prevention mechanism of water on sandstone rockburst are analyzed from the perspective of energy and failure mode.The results show that the higher the ab-sorption degree,the lower the intensity of the rockburst after absorbing water on single side of sand-stone.This is reflected in the fact that with the increase in the water absorption level,the ejection velocity of rockburst fragments is smaller,the depth of the rockburst pit is shallower,and the AE energy is smaller.Under the water absorption level of 100%,the magnitude of rockburst intensity changes from medium to slight.The prevention mechanism of water on sandstone rockburst is that water reduces the capacity of sandstone to store strain energy and accelerates the expansion of shear cracks,which is not conducive to the occurrence of plate cracking before rockburst,and destroys the conditions for rockburst incubation. 展开更多
关键词 ROCKBURST water Prevention effect Crack evolution
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