Segregated incompressible large eddy simulation and acoustic perturbation equations were used to obtain the flow field and sound field of 1:25 scale trains with three,six and eight coaches in a long tunnel,and the aer...Segregated incompressible large eddy simulation and acoustic perturbation equations were used to obtain the flow field and sound field of 1:25 scale trains with three,six and eight coaches in a long tunnel,and the aerodynamic results were verified by wind tunnel test with the same scale two-coach train model.Time-averaged drag coefficients of the head coach of three trains are similar,but at the tail coach of the multi-group trains it is much larger than that of the three-coach train.The eight-coach train presents the largest increment from the head coach to the tail coach in the standard deviation(STD)of aerodynamic force coefficients:0.0110 for drag coefficient(Cd),0.0198 for lift coefficient(Cl)and 0.0371 for side coef-ficient(Cs).Total sound pressure level at the bottom of multi-group trains presents a significant streamwise increase,which is different from the three-coach train.Tunnel walls affect the acoustic distribution at the bottom,only after the coach number reaches a certain value,and the streamwise increase in the sound pressure fluctuation of multi-group trains is strengthened by coach number.Fourier transform of the turbulent and sound pressures presents that coach number has little influence on the peak frequencies,but increases the sound pressure level values at the tail bogie cavities.Furthermore,different from the turbulent pressure,the first two sound pressure proper orthogonal decomposition(POD)modes in the bogie cavities contain 90%of the total energy,and the spatial distributions indicate that the acoustic distributions in the head and tail bogies are not related to coach number.展开更多
BACKGROUND Public employees worldwide are increasingly concerned about work anxiety and depression.Cognitive-behavioral career coaching has emerged as a promising strategy for addressing these mental health disorders,...BACKGROUND Public employees worldwide are increasingly concerned about work anxiety and depression.Cognitive-behavioral career coaching has emerged as a promising strategy for addressing these mental health disorders,which can negatively impact on a person's overall well-being and performance.AIM To examine whether cognitive-behavioral career coaching reduces work anxiety and depression among Nigerian public employees.METHODS A total of 120 public employees(n=60)suffering from severe anxiety and depression were randomly assigned to the treatment or control groups in this study.Cognitive behavioral coaching was provided twice a week to those in the treatment group,whereas no treatment was given to those in the control group.As part of the study,the Hamilton Anxiety Rating Scales and Beck Depression Inventory were used to collect data.RESULTS Analysis of covariance of the data from participants indicates a significant effect of cognitive-behavioral career coaching on work anxiety and depression.CONCLUSION Insights into the underlying mechanisms by which cognitive behavior career coaching exerts its effects have been gained from this study.Also,the study has gathered valuable data that can inform future practice and guide the development of strategies for supporting mental health at work.展开更多
This editorial explores the study by Mkpoikanke Sunday Otu and Maximus Monaheng Sefotho on the use of cognitive-behavioral career coaching(CBCC)to reduce work anxiety and depression among public employees.Public secto...This editorial explores the study by Mkpoikanke Sunday Otu and Maximus Monaheng Sefotho on the use of cognitive-behavioral career coaching(CBCC)to reduce work anxiety and depression among public employees.Public sector workers often face significant psychological stressors,leading to mental health issues that impair well-being and job performance.The study employed a grouprandomized trial design,involving 120 public employees diagnosed with severe anxiety and depression.Participants were divided into a treatment group,receiving CBCC,and a control group with no intervention.Results showed a significant reduction in anxiety and depression levels in the treatment group,sustained through follow-up assessments.The findings underscore the clinical relevance of CBCC as an effective intervention for improving mental health among public employees.Future research should explore the scalability of CBCC across different sectors and cultural contexts,as well as its integration with other mental health interventions.This editorial advocates for the broader implementation of CBCC practices in public service to enhance employee productivity and psychological well-being.By addressing cognitive distortions and fostering adaptive coping mechanisms,CBCC can help public employees navigate complex professional environments,ultimately contributing to a healthier and more efficient workforce.展开更多
This paper presents a requirement engineering for developing an e-coaching environment in the higher education sector. This research demonstrates that IT experts encounter challenges in establishing a system that matc...This paper presents a requirement engineering for developing an e-coaching environment in the higher education sector. This research demonstrates that IT experts encounter challenges in establishing a system that matches a university’s expectations, as they are usually uncertain about its goals and system requirements. The paper illustrates a business goal-focused requirement induction technique, which encompasses demonstrating the business procedures through Business Process Modelling Notation (BPMN), assessing the university goals via the tree diagram, and drawing out the system requirements from the university objectives through UML state diagrams. A case study of supporting the development of a new IT course is used as a case study and applied using BPMN.展开更多
Background:Family is an essential element in caring for clients with hypertension.Appropriate hypertension management can reduce health risks during the treatment.Health coaching in family is a critical intervention t...Background:Family is an essential element in caring for clients with hypertension.Appropriate hypertension management can reduce health risks during the treatment.Health coaching in family is a critical intervention to control and manage hypertension through providing education,information,and skills intervention are needed to support lifestyle improvements,manage chronic conditions,and prevent complications of hypertension.This literature study describes health coaching for controlling blood pressure among clients with hypertension in the family.Methods:Narrative literature review was performed to select the article that relates to health coaching of hypertension in the family using search engines including PubMed,ProQuest,SpringerLink,ScienceDirect,and Google Scholar by using keywords health coaching,family,hypertension,and blood pressure.The analysis of articles was carried out using four stages based on the PRISMA flowchart diagram.Results:The results indicated eight articles that were analyzed in this study.Interactive health coaching interventions based on a healthy lifestyle carried out with patients and families effectively improve medication adherence and reduce systolic and diastolic blood pressure.Meanwhile,health coaching applied regarding the principles including motivation,discussion,interviews and goal setting to influence behavior change and self-management.Conclusions:That health coaching applied for families with clients with hypertension is effect on reducing blood pressure and other changes,including knowledge,self-efficacy,and behavior towards health services for patients with hypertension.Therefore,health coaching for the family could be used as a family intervention for clients with hypertension during home health care.展开更多
The role of coach is a significant factor for players, both mentally and physically, as the sport environment is an important social context stimulating players to develop social skills, work discipline and habits. In...The role of coach is a significant factor for players, both mentally and physically, as the sport environment is an important social context stimulating players to develop social skills, work discipline and habits. In order to achieve a quality relationship between players and coach, it is essential to create mutual trust, which is the key factor of a well-functioning team. Changing the coach changes the whole psychophysical concept of the training process, training approach, and changes the team itself. The change of coach affects the psychophysical condition of the players not because the previous coach was better or worse, but because of the change itself. Due to the new conditions, players are often distracted, anxious, and lost focus during the training. Consequently, by trying to prove themselves again and in fear of a new coach, the player may lose concentration resulting in an irregular movement balance, and due to insufficient muscle strength to overcome the external force, new injuries or reoccurrence of old injuries are possible. The most common injuries are ruptures and strains of muscles and ligaments reinforcing the most heavily stressed joint while performing a certain movement. A positive factor of having a new coach is the great need to prove oneself, especially in players that were not recognized by the previous coach. Coach changes are often counterproductive because players get used to character, tactics, training methods, and teamwork organization. Due to the new coach’s lack of knowledge about the psychophysical readiness and the ability of each individual player and his specific training methods, injuries are often inevitable.展开更多
For the coach industry, rapid modeling and efficient optimization methods are desirable for structure modeling and optimization based on simplified structures, especially for use early in the concept phase and with ca...For the coach industry, rapid modeling and efficient optimization methods are desirable for structure modeling and optimization based on simplified structures, especially for use early in the concept phase and with capabilities of accurately expressing the mechanical properties of structure and with flexible section forms. However, the present dimension-based methods cannot easily meet these requirements. To achieve these goals, the property-based modeling （PBM） beam modeling method is studied based on the PBM theory and in conjunction with the characteristics of coach structure of taking beam as the main component. For a beam component of concrete length, its mechanical characteristics are primarily affected by the section properties. Four section parameters are adopted to describe the mechanical properties of a beam, including the section area, the principal moments of inertia about the two principal axles, and the torsion constant of the section. Based on the equivalent stiffness strategy, expressions for the above section parameters are derived, and the PBM beam element is implemented in HyperMesh software. A case is realized using this method, in which the structure of a passenger coach is simplified. The model precision is validated by comparing the basic performance of the total structure with that of the original structure, including the bending and torsion stiffness and the first-order bending and torsional modal frequencies. Sensitivity analysis is conducted to choose design variables. The optimal Latin hypercube experiment design is adopted to sample the test points, and polynomial response surfaces are used to fit these points. To improve the bending and torsion stiffness and the first-order torsional frequency and taking the allowable maximum stresses of the braking and left turning conditions as constraints, the multi-objective optimization of the structure is conducted using the NSGA-II genetic algorithm on the ISIGHT platform. The result of the Pareto solution set is acquired, and the selection strategy of the final solution is discussed. The case study demonstrates that the mechanical performances of the structure can be well-modeled and simulated by PBM beam. Because of the merits of fewer parameters and convenience of use, this method is suitable to be applied in the concept stage. Another merit is that the optimization results are the requirements for the mechanical performance of the beam section instead of those of the shape and dimensions, bringing flexibility to the succeeding design.展开更多
Purpose： To assess the effects of trust in the coach on commitment to coach, willingness to cooperate, and perceived performance. Methods： Two hundred and fifteen members of competitive sports clubs responded to sca...Purpose： To assess the effects of trust in the coach on commitment to coach, willingness to cooperate, and perceived performance. Methods： Two hundred and fifteen members of competitive sports clubs responded to scales measuring coach characteristics of justice, benevolence, integrity, and competence; athlete＇s trust in the coach; commitment to coach; willingness to cooperate; and perceived performance. Results： Confirmatory factor analysis of data supported the measurement model. Perceptions of a coach＇s justice （β = 0.19, p 〈 0.05）, benevolence （β = 0.32, p 〈 0.05）, integrity （β= 0.14, p 〈 0.05）, and competence （β = 0.29, p 〈 0.05） each had a significant effect on athletes＇ trust, and they cumulatively accounted for 61% of the variance in trust. The structural equation modeling showed that trust had direct effects on commitment to coach （β = 0.77, p 〈 0.01）, willingness to cooperate （β= 0.79, p 〈 0.01 ）, and perceived performance （β = 0.51, p 〈 0.01）,. The hypothesized mediating effects of commitment to coach and willingness to cooperate were not supported. The model explained 26% of the variance in perceived performance. Conclusion： As trust in coach influences commitment to coach, willingness to cooperate, and perceived performance, coaches need to take effort to bolster their athletes＇ trust by being just and benevolent, and enhancing their integrity and competence.展开更多
基金supported by the National Natural Science Foundation of China (Grant No. 52072267)Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management Systems (Grant No. 23DZ2229029)
文摘Segregated incompressible large eddy simulation and acoustic perturbation equations were used to obtain the flow field and sound field of 1:25 scale trains with three,six and eight coaches in a long tunnel,and the aerodynamic results were verified by wind tunnel test with the same scale two-coach train model.Time-averaged drag coefficients of the head coach of three trains are similar,but at the tail coach of the multi-group trains it is much larger than that of the three-coach train.The eight-coach train presents the largest increment from the head coach to the tail coach in the standard deviation(STD)of aerodynamic force coefficients:0.0110 for drag coefficient(Cd),0.0198 for lift coefficient(Cl)and 0.0371 for side coef-ficient(Cs).Total sound pressure level at the bottom of multi-group trains presents a significant streamwise increase,which is different from the three-coach train.Tunnel walls affect the acoustic distribution at the bottom,only after the coach number reaches a certain value,and the streamwise increase in the sound pressure fluctuation of multi-group trains is strengthened by coach number.Fourier transform of the turbulent and sound pressures presents that coach number has little influence on the peak frequencies,but increases the sound pressure level values at the tail bogie cavities.Furthermore,different from the turbulent pressure,the first two sound pressure proper orthogonal decomposition(POD)modes in the bogie cavities contain 90%of the total energy,and the spatial distributions indicate that the acoustic distributions in the head and tail bogies are not related to coach number.
文摘BACKGROUND Public employees worldwide are increasingly concerned about work anxiety and depression.Cognitive-behavioral career coaching has emerged as a promising strategy for addressing these mental health disorders,which can negatively impact on a person's overall well-being and performance.AIM To examine whether cognitive-behavioral career coaching reduces work anxiety and depression among Nigerian public employees.METHODS A total of 120 public employees(n=60)suffering from severe anxiety and depression were randomly assigned to the treatment or control groups in this study.Cognitive behavioral coaching was provided twice a week to those in the treatment group,whereas no treatment was given to those in the control group.As part of the study,the Hamilton Anxiety Rating Scales and Beck Depression Inventory were used to collect data.RESULTS Analysis of covariance of the data from participants indicates a significant effect of cognitive-behavioral career coaching on work anxiety and depression.CONCLUSION Insights into the underlying mechanisms by which cognitive behavior career coaching exerts its effects have been gained from this study.Also,the study has gathered valuable data that can inform future practice and guide the development of strategies for supporting mental health at work.
基金Supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of EducationNo.NRF-RS-2023-00237287+1 种基金No.NRF-2021S1A5A8062526Local Government-University Cooperation-Based Regional Innovation Projects,No.2021RIS-003.
文摘This editorial explores the study by Mkpoikanke Sunday Otu and Maximus Monaheng Sefotho on the use of cognitive-behavioral career coaching(CBCC)to reduce work anxiety and depression among public employees.Public sector workers often face significant psychological stressors,leading to mental health issues that impair well-being and job performance.The study employed a grouprandomized trial design,involving 120 public employees diagnosed with severe anxiety and depression.Participants were divided into a treatment group,receiving CBCC,and a control group with no intervention.Results showed a significant reduction in anxiety and depression levels in the treatment group,sustained through follow-up assessments.The findings underscore the clinical relevance of CBCC as an effective intervention for improving mental health among public employees.Future research should explore the scalability of CBCC across different sectors and cultural contexts,as well as its integration with other mental health interventions.This editorial advocates for the broader implementation of CBCC practices in public service to enhance employee productivity and psychological well-being.By addressing cognitive distortions and fostering adaptive coping mechanisms,CBCC can help public employees navigate complex professional environments,ultimately contributing to a healthier and more efficient workforce.
文摘This paper presents a requirement engineering for developing an e-coaching environment in the higher education sector. This research demonstrates that IT experts encounter challenges in establishing a system that matches a university’s expectations, as they are usually uncertain about its goals and system requirements. The paper illustrates a business goal-focused requirement induction technique, which encompasses demonstrating the business procedures through Business Process Modelling Notation (BPMN), assessing the university goals via the tree diagram, and drawing out the system requirements from the university objectives through UML state diagrams. A case study of supporting the development of a new IT course is used as a case study and applied using BPMN.
文摘Background:Family is an essential element in caring for clients with hypertension.Appropriate hypertension management can reduce health risks during the treatment.Health coaching in family is a critical intervention to control and manage hypertension through providing education,information,and skills intervention are needed to support lifestyle improvements,manage chronic conditions,and prevent complications of hypertension.This literature study describes health coaching for controlling blood pressure among clients with hypertension in the family.Methods:Narrative literature review was performed to select the article that relates to health coaching of hypertension in the family using search engines including PubMed,ProQuest,SpringerLink,ScienceDirect,and Google Scholar by using keywords health coaching,family,hypertension,and blood pressure.The analysis of articles was carried out using four stages based on the PRISMA flowchart diagram.Results:The results indicated eight articles that were analyzed in this study.Interactive health coaching interventions based on a healthy lifestyle carried out with patients and families effectively improve medication adherence and reduce systolic and diastolic blood pressure.Meanwhile,health coaching applied regarding the principles including motivation,discussion,interviews and goal setting to influence behavior change and self-management.Conclusions:That health coaching applied for families with clients with hypertension is effect on reducing blood pressure and other changes,including knowledge,self-efficacy,and behavior towards health services for patients with hypertension.Therefore,health coaching for the family could be used as a family intervention for clients with hypertension during home health care.
文摘The role of coach is a significant factor for players, both mentally and physically, as the sport environment is an important social context stimulating players to develop social skills, work discipline and habits. In order to achieve a quality relationship between players and coach, it is essential to create mutual trust, which is the key factor of a well-functioning team. Changing the coach changes the whole psychophysical concept of the training process, training approach, and changes the team itself. The change of coach affects the psychophysical condition of the players not because the previous coach was better or worse, but because of the change itself. Due to the new conditions, players are often distracted, anxious, and lost focus during the training. Consequently, by trying to prove themselves again and in fear of a new coach, the player may lose concentration resulting in an irregular movement balance, and due to insufficient muscle strength to overcome the external force, new injuries or reoccurrence of old injuries are possible. The most common injuries are ruptures and strains of muscles and ligaments reinforcing the most heavily stressed joint while performing a certain movement. A positive factor of having a new coach is the great need to prove oneself, especially in players that were not recognized by the previous coach. Coach changes are often counterproductive because players get used to character, tactics, training methods, and teamwork organization. Due to the new coach’s lack of knowledge about the psychophysical readiness and the ability of each individual player and his specific training methods, injuries are often inevitable.
文摘For the coach industry, rapid modeling and efficient optimization methods are desirable for structure modeling and optimization based on simplified structures, especially for use early in the concept phase and with capabilities of accurately expressing the mechanical properties of structure and with flexible section forms. However, the present dimension-based methods cannot easily meet these requirements. To achieve these goals, the property-based modeling （PBM） beam modeling method is studied based on the PBM theory and in conjunction with the characteristics of coach structure of taking beam as the main component. For a beam component of concrete length, its mechanical characteristics are primarily affected by the section properties. Four section parameters are adopted to describe the mechanical properties of a beam, including the section area, the principal moments of inertia about the two principal axles, and the torsion constant of the section. Based on the equivalent stiffness strategy, expressions for the above section parameters are derived, and the PBM beam element is implemented in HyperMesh software. A case is realized using this method, in which the structure of a passenger coach is simplified. The model precision is validated by comparing the basic performance of the total structure with that of the original structure, including the bending and torsion stiffness and the first-order bending and torsional modal frequencies. Sensitivity analysis is conducted to choose design variables. The optimal Latin hypercube experiment design is adopted to sample the test points, and polynomial response surfaces are used to fit these points. To improve the bending and torsion stiffness and the first-order torsional frequency and taking the allowable maximum stresses of the braking and left turning conditions as constraints, the multi-objective optimization of the structure is conducted using the NSGA-II genetic algorithm on the ISIGHT platform. The result of the Pareto solution set is acquired, and the selection strategy of the final solution is discussed. The case study demonstrates that the mechanical performances of the structure can be well-modeled and simulated by PBM beam. Because of the merits of fewer parameters and convenience of use, this method is suitable to be applied in the concept stage. Another merit is that the optimization results are the requirements for the mechanical performance of the beam section instead of those of the shape and dimensions, bringing flexibility to the succeeding design.
文摘Purpose： To assess the effects of trust in the coach on commitment to coach, willingness to cooperate, and perceived performance. Methods： Two hundred and fifteen members of competitive sports clubs responded to scales measuring coach characteristics of justice, benevolence, integrity, and competence; athlete＇s trust in the coach; commitment to coach; willingness to cooperate; and perceived performance. Results： Confirmatory factor analysis of data supported the measurement model. Perceptions of a coach＇s justice （β = 0.19, p 〈 0.05）, benevolence （β = 0.32, p 〈 0.05）, integrity （β= 0.14, p 〈 0.05）, and competence （β = 0.29, p 〈 0.05） each had a significant effect on athletes＇ trust, and they cumulatively accounted for 61% of the variance in trust. The structural equation modeling showed that trust had direct effects on commitment to coach （β = 0.77, p 〈 0.01）, willingness to cooperate （β= 0.79, p 〈 0.01 ）, and perceived performance （β = 0.51, p 〈 0.01）,. The hypothesized mediating effects of commitment to coach and willingness to cooperate were not supported. The model explained 26% of the variance in perceived performance. Conclusion： As trust in coach influences commitment to coach, willingness to cooperate, and perceived performance, coaches need to take effort to bolster their athletes＇ trust by being just and benevolent, and enhancing their integrity and competence.
