This study analyzed the difference between using a downward breaststroke kick and a horizontal breaststroke kick in a sample of world class elite swimmers.We compared average muscle activity of the gluteus maximus,qua...This study analyzed the difference between using a downward breaststroke kick and a horizontal breaststroke kick in a sample of world class elite swimmers.We compared average muscle activity of the gluteus maximus,quadriceps femoris(vastus medialis and rectus femoris),hamstring/long head of the biceps femoris,gastrocnemius medialis,rectus abdominal,and erector spinae when using the downward breaststroke kick technique.We find that when this sample of swimmers utilized the downward breaststroke kick,max speed and velocity per stroke increased,measured by 12,788 EMG samples,where the results are highly correlated to duration of the aerodynamic buoyant force in breaststroke kick technique.The increases in performance observed from measuring the world class elite swimmers is highly correlated to the duration of the kick aerodynamic buoyant force.Among this sample of elite swimmers,the longer a swimmer demonstrates a buoyant force breaststroke kick,the lower the time in a 100 breaststroke.展开更多
Many young elite athletes do not meet their daily energy and nutrient requirements. However, little research has been done on why these athletes do not meet their daily needs. The aim was to research the barriers and ...Many young elite athletes do not meet their daily energy and nutrient requirements. However, little research has been done on why these athletes do not meet their daily needs. The aim was to research the barriers and motivators of young Dutch elite athletes to optimize their nutritional intake. Quantitative and qualitative research was conducted among 8 handball and 4 volleyball players at the Dutch National Sports Center (17.2 ± 0.8 years). First, the nutritional intake was tracked through food diaries and analyzed in Nutritics. Thereupon, five semi-structured interviews based on the COM-B model were carried out. The interviews were transcribed and coded. The athletes had a reduced intake of energy, carbohydrates, vitamins A, C, E, D, calcium, potassium, zinc, and iron compared to their requirements. Seven themes for optimizing their nutritional intake emerged in the interviews: needs assessment, practical translation, portion size, lack of time, involvement, individuality, and food distribution. Barriers that the athletes experienced were that they did not know what their total daily nutritional needs were and how this translates into practice. In addition, the portion size at dinner was too small. They also had little time to eat a full meal due to time pressure from training and school. On the other hand, motivators were receiving meal options to translate their needs into practice with a distribution of moments when they need to eat. Covering these topics in nutritional workshops where athletes actively participate with more individual focus, could contribute to the optimization of their nutritional intake.展开更多
Efficient speed controllers for dynamic driving tasks in autonomous vehicles are crucial for ensuring safety and reliability.This study proposes a novel approach for designing a fractional order proportional-integral-...Efficient speed controllers for dynamic driving tasks in autonomous vehicles are crucial for ensuring safety and reliability.This study proposes a novel approach for designing a fractional order proportional-integral-derivative(FOPID)controller that utilizes a modified elite opposition-based artificial hummingbird algorithm(m-AHA)for optimal parameter tuning.Our approach outperforms existing optimization techniques on benchmark functions,and we demonstrate its effectiveness in controlling cruise control systems with increased flexibility and precision.Our study contributes to the advancement of autonomous vehicle technology by introducing a novel and efficient method for FOPID controller design that can enhance the driving experience while ensuring safety and reliability.We highlight the significance of our findings by demonstrating how our approach can improve the performance,safety,and reliability of autonomous vehicles.This study’s contributions are particularly relevant in the context of the growing demand for autonomous vehicles and the need for advanced control techniques to ensure their safe operation.Our research provides a promising avenue for further research and development in this area.展开更多
Background:Developing context-specific,evidence-informed,and implementable injury-prevention programs is challenging.Women playing in the elite Australian Football League for Women are at high risk of serious knee inj...Background:Developing context-specific,evidence-informed,and implementable injury-prevention programs is challenging.Women playing in the elite Australian Football League for Women are at high risk of serious knee injuries,and no specific injury-prevention program exists.The objective of the study was to describe the collaborative process used to create a context-specific injury-prevention program.Methods:A previously used intervention-development process was modified to incorporate a partnership with the sport’s governing organization and focus on engaging program implementers.The Reach Effectiveness Adoption Implementation and Maintenance(RE-AIM)Sports Setting Matrix guided program development and implementation strategies.Results:The 7-step process,aligned with the RE-AIM Sports Setting Matrix,was applied to develop the injury-prevention program and was titled Prep to Play PRO.The steps were:(Step 1)gaining organizational support and establishing a project partnership;(Step 2)using research evidence and clinical experience;(Step 3)consulting content and context experts;(Step 4)engaging the organization,experts,program implementers,and end-users to concreate the intervention and develop implementation strategies;(Step 5)testing the intervention acceptability and feasibility;(Step 6)evaluating the intervention and implementation strategies against theory;and(Step 7)obtaining feedback from early implementers and end-users.Conclusion:Engaging critical stakeholders at multiple ecological levels(organization,team,and athlete)throughout program development and implementation planning support real-world use.The processes and activities described can guide future sports injury-prevention program development and implementation.展开更多
The disintegration of networks is a widely researched topic with significant applications in fields such as counterterrorism and infectious disease control. While the traditional approaches for achieving network disin...The disintegration of networks is a widely researched topic with significant applications in fields such as counterterrorism and infectious disease control. While the traditional approaches for achieving network disintegration involve identifying critical sets of nodes or edges, limited research has been carried out on edge-based disintegration strategies. We propose a novel algorithm, i.e., a rank aggregation elite enumeration algorithm based on edge-coupled networks(RAEEC),which aims to implement tiling for edge-coupled networks by finding important sets of edges in the network while balancing effectiveness and efficiency. Our algorithm is based on a two-layer edge-coupled network model with one-to-one links, and utilizes three advanced edge importance metrics to rank the edges separately. A comprehensive ranking of edges is obtained using a rank aggregation approach proposed in this study. The top few edges from the ranking set obtained by RAEEC are then used to generate an enumeration set, which is continuously iteratively updated to identify the set of elite attack edges.We conduct extensive experiments on synthetic networks to evaluate the performance of our proposed method, and the results indicate that RAEEC achieves a satisfactory balance between efficiency and effectiveness. Our approach represents a significant contribution to the field of network disintegration, particularly for edge-based strategies.展开更多
Rice panicle branches are key routes for transportation of photo synthetic products to grains.Branch senescence is an important trait that the breeders considered when breeding elite rice cultivars in South China.Howe...Rice panicle branches are key routes for transportation of photo synthetic products to grains.Branch senescence is an important trait that the breeders considered when breeding elite rice cultivars in South China.However,little is known about the mechanisms underlying the contributions of stay-green panicle branches to rice yield and quality.Here,we reported stay-green branches that continuously maintained transportation function and provided carbohydrates for basal grain development at the late stages of rice development.This ensured the coordination of development between apical and basal grains,and further improved the processing quality of elite rice.These findings provided strategies for improving the fullness and quality of rice grains and presented an important basis for cultivating elite rice.展开更多
Perceive a new tendency,see a new future,take advantage of new technologies and lead a new wave!From Mar.23rd-25th,the“2023 China Surfactant Industry Conference”and“2023 China International Surfactant Industry Expo...Perceive a new tendency,see a new future,take advantage of new technologies and lead a new wave!From Mar.23rd-25th,the“2023 China Surfactant Industry Conference”and“2023 China International Surfactant Industry Expo”were held fervently at Guangzhou Nanfeng Langham Hotel.This grand event was sponsored by China Research Institute of Daily Chemical Industry,undertaken by China Daily Chemical Industry Information Center and Surfactant&Detergent Industry Productivity Promotion Center.展开更多
The main topic of the research is applying of systems approach in studying of political elite. This approach was applied in the analysis of Russia＇s regional power elite （1991 to 2010）. The elite was studied as a c...The main topic of the research is applying of systems approach in studying of political elite. This approach was applied in the analysis of Russia＇s regional power elite （1991 to 2010）. The elite was studied as a complex self-reference system oriented at its own environment, not only in an adaptive way, but first and foremost in structure. The systems approach specifies the following conceptual framework of the study： self-reference, system boundaries, and interaction between the political elite and the surrounding world. Application of the systems analysis to studying the political elite enabled to analyze the structure and functions of the elite, create a model of elitogenesis, and receive study matrix.展开更多
全新产品系列包括快速开关MOSFET和半桥功率集成模块,具备领先行业的每开关超低导通电阻Rds(on),采用行业标准封装智能电源和智能感知技术的领导者安森美(onsemi,美国纳斯达克上市代号:ON),推出最新一代1200 V Elite SiC碳化硅(SiC)M3S...全新产品系列包括快速开关MOSFET和半桥功率集成模块,具备领先行业的每开关超低导通电阻Rds(on),采用行业标准封装智能电源和智能感知技术的领导者安森美(onsemi,美国纳斯达克上市代号:ON),推出最新一代1200 V Elite SiC碳化硅(SiC)M3S器件,助力电力电子工程师实现更出色的能效和更低系统成本。全新产品系列包括有助于提高开关速度的Elite SiC MOSFET和模块,以适配越来越多的800 V电动汽车(EV)车载充电器(OBC)和电动汽车直流快充、太阳能方案以及能源储存等能源基础设施应用。展开更多
文摘This study analyzed the difference between using a downward breaststroke kick and a horizontal breaststroke kick in a sample of world class elite swimmers.We compared average muscle activity of the gluteus maximus,quadriceps femoris(vastus medialis and rectus femoris),hamstring/long head of the biceps femoris,gastrocnemius medialis,rectus abdominal,and erector spinae when using the downward breaststroke kick technique.We find that when this sample of swimmers utilized the downward breaststroke kick,max speed and velocity per stroke increased,measured by 12,788 EMG samples,where the results are highly correlated to duration of the aerodynamic buoyant force in breaststroke kick technique.The increases in performance observed from measuring the world class elite swimmers is highly correlated to the duration of the kick aerodynamic buoyant force.Among this sample of elite swimmers,the longer a swimmer demonstrates a buoyant force breaststroke kick,the lower the time in a 100 breaststroke.
文摘Many young elite athletes do not meet their daily energy and nutrient requirements. However, little research has been done on why these athletes do not meet their daily needs. The aim was to research the barriers and motivators of young Dutch elite athletes to optimize their nutritional intake. Quantitative and qualitative research was conducted among 8 handball and 4 volleyball players at the Dutch National Sports Center (17.2 ± 0.8 years). First, the nutritional intake was tracked through food diaries and analyzed in Nutritics. Thereupon, five semi-structured interviews based on the COM-B model were carried out. The interviews were transcribed and coded. The athletes had a reduced intake of energy, carbohydrates, vitamins A, C, E, D, calcium, potassium, zinc, and iron compared to their requirements. Seven themes for optimizing their nutritional intake emerged in the interviews: needs assessment, practical translation, portion size, lack of time, involvement, individuality, and food distribution. Barriers that the athletes experienced were that they did not know what their total daily nutritional needs were and how this translates into practice. In addition, the portion size at dinner was too small. They also had little time to eat a full meal due to time pressure from training and school. On the other hand, motivators were receiving meal options to translate their needs into practice with a distribution of moments when they need to eat. Covering these topics in nutritional workshops where athletes actively participate with more individual focus, could contribute to the optimization of their nutritional intake.
文摘Efficient speed controllers for dynamic driving tasks in autonomous vehicles are crucial for ensuring safety and reliability.This study proposes a novel approach for designing a fractional order proportional-integral-derivative(FOPID)controller that utilizes a modified elite opposition-based artificial hummingbird algorithm(m-AHA)for optimal parameter tuning.Our approach outperforms existing optimization techniques on benchmark functions,and we demonstrate its effectiveness in controlling cruise control systems with increased flexibility and precision.Our study contributes to the advancement of autonomous vehicle technology by introducing a novel and efficient method for FOPID controller design that can enhance the driving experience while ensuring safety and reliability.We highlight the significance of our findings by demonstrating how our approach can improve the performance,safety,and reliability of autonomous vehicles.This study’s contributions are particularly relevant in the context of the growing demand for autonomous vehicles and the need for advanced control techniques to ensure their safe operation.Our research provides a promising avenue for further research and development in this area.
基金supported by an AFL Research Board Grant(2018)La Trobe University Research Focus Area Grant(2018)+2 种基金La Trobe University Exercise and Medicine Research Centresupported by a National Health and Medical Research Council(NHMRC)Early Career Fellowship(No.1156674)supported by a NHMRC Postgraduate Scholarship(No.1114296).
文摘Background:Developing context-specific,evidence-informed,and implementable injury-prevention programs is challenging.Women playing in the elite Australian Football League for Women are at high risk of serious knee injuries,and no specific injury-prevention program exists.The objective of the study was to describe the collaborative process used to create a context-specific injury-prevention program.Methods:A previously used intervention-development process was modified to incorporate a partnership with the sport’s governing organization and focus on engaging program implementers.The Reach Effectiveness Adoption Implementation and Maintenance(RE-AIM)Sports Setting Matrix guided program development and implementation strategies.Results:The 7-step process,aligned with the RE-AIM Sports Setting Matrix,was applied to develop the injury-prevention program and was titled Prep to Play PRO.The steps were:(Step 1)gaining organizational support and establishing a project partnership;(Step 2)using research evidence and clinical experience;(Step 3)consulting content and context experts;(Step 4)engaging the organization,experts,program implementers,and end-users to concreate the intervention and develop implementation strategies;(Step 5)testing the intervention acceptability and feasibility;(Step 6)evaluating the intervention and implementation strategies against theory;and(Step 7)obtaining feedback from early implementers and end-users.Conclusion:Engaging critical stakeholders at multiple ecological levels(organization,team,and athlete)throughout program development and implementation planning support real-world use.The processes and activities described can guide future sports injury-prevention program development and implementation.
基金supported by the National Natural Science Foundation of China (Grant Nos. 61877046, 12271419, and 62106186)the Natural Science Basic Research Program of Shaanxi (Program No. 2022JQ-620)the Fundamental Research Funds for the Central Universities (Grant Nos. XJS220709, JB210701, and QTZX23002)。
文摘The disintegration of networks is a widely researched topic with significant applications in fields such as counterterrorism and infectious disease control. While the traditional approaches for achieving network disintegration involve identifying critical sets of nodes or edges, limited research has been carried out on edge-based disintegration strategies. We propose a novel algorithm, i.e., a rank aggregation elite enumeration algorithm based on edge-coupled networks(RAEEC),which aims to implement tiling for edge-coupled networks by finding important sets of edges in the network while balancing effectiveness and efficiency. Our algorithm is based on a two-layer edge-coupled network model with one-to-one links, and utilizes three advanced edge importance metrics to rank the edges separately. A comprehensive ranking of edges is obtained using a rank aggregation approach proposed in this study. The top few edges from the ranking set obtained by RAEEC are then used to generate an enumeration set, which is continuously iteratively updated to identify the set of elite attack edges.We conduct extensive experiments on synthetic networks to evaluate the performance of our proposed method, and the results indicate that RAEEC achieves a satisfactory balance between efficiency and effectiveness. Our approach represents a significant contribution to the field of network disintegration, particularly for edge-based strategies.
基金supported by the Laboratory of Lingnan Modern Agriculture Project,China (Grant No. NT2021001)the National Natural Science Foundation of China (Grant No. 31801448)+1 种基金the Special Fund for Scientific Innovation Strategy-Construction of High Level Academy of Agriculture Science,China (Grant No. R2018PY-QF003)the Special Fund for Science and Technology Innovation Strategy of Guangdong Academy of Agricultural Sciences,Dean’s Fund Key Project (Grant No. 202001)。
文摘Rice panicle branches are key routes for transportation of photo synthetic products to grains.Branch senescence is an important trait that the breeders considered when breeding elite rice cultivars in South China.However,little is known about the mechanisms underlying the contributions of stay-green panicle branches to rice yield and quality.Here,we reported stay-green branches that continuously maintained transportation function and provided carbohydrates for basal grain development at the late stages of rice development.This ensured the coordination of development between apical and basal grains,and further improved the processing quality of elite rice.These findings provided strategies for improving the fullness and quality of rice grains and presented an important basis for cultivating elite rice.
文摘Perceive a new tendency,see a new future,take advantage of new technologies and lead a new wave!From Mar.23rd-25th,the“2023 China Surfactant Industry Conference”and“2023 China International Surfactant Industry Expo”were held fervently at Guangzhou Nanfeng Langham Hotel.This grand event was sponsored by China Research Institute of Daily Chemical Industry,undertaken by China Daily Chemical Industry Information Center and Surfactant&Detergent Industry Productivity Promotion Center.
文摘The main topic of the research is applying of systems approach in studying of political elite. This approach was applied in the analysis of Russia＇s regional power elite （1991 to 2010）. The elite was studied as a complex self-reference system oriented at its own environment, not only in an adaptive way, but first and foremost in structure. The systems approach specifies the following conceptual framework of the study： self-reference, system boundaries, and interaction between the political elite and the surrounding world. Application of the systems analysis to studying the political elite enabled to analyze the structure and functions of the elite, create a model of elitogenesis, and receive study matrix.
文摘全新产品系列包括快速开关MOSFET和半桥功率集成模块,具备领先行业的每开关超低导通电阻Rds(on),采用行业标准封装智能电源和智能感知技术的领导者安森美(onsemi,美国纳斯达克上市代号:ON),推出最新一代1200 V Elite SiC碳化硅(SiC)M3S器件,助力电力电子工程师实现更出色的能效和更低系统成本。全新产品系列包括有助于提高开关速度的Elite SiC MOSFET和模块,以适配越来越多的800 V电动汽车(EV)车载充电器(OBC)和电动汽车直流快充、太阳能方案以及能源储存等能源基础设施应用。
