High-purity SiO_(2)nanoparticles(SNPs)play a crucial role in various electronic applications,such as semiconductors,solar cells,optical fibers,lenses,and insulating layers,given their purity and particle size,which si...High-purity SiO_(2)nanoparticles(SNPs)play a crucial role in various electronic applications,such as semiconductors,solar cells,optical fibers,lenses,and insulating layers,given their purity and particle size,which significantly impact device efficiency.This study fo-cuses on the synthesis and characterization of pure SNPs through the chemical etching of greater club rush.White powder SNPs were pre-pared using HCl etching,and their thermal behaviors were analyzed via thermogravimetric analysis/differential scanning calorimetry.Structural properties were investigated using X-ray fluorescence,scanning electron microscopy,and transmission electron microscopy.X-ray absorption near-edge structure was employed to assess the oxidation state of the SNPs.The morphology of the SNPs after the first etching was amorphous,with sizes ranging from 50 to 100 nm,which increased to 50-200 nm after the second etching.Despite this size variation,the SNPs maintained a high purity level of 99.8wt%SiO_(2),comparable with industry standards.Notably,the second etching with 0.1-M HCl significantly enhanced the purity level,achieving 99.8wt%SiO_(2)mass.Furthermore,HCl etching facilitated the formation of SiO_(2)in the Si^(4+)oxidation state,akin to industrial SNPs.These findings underscore the critical role of HCl etching in synthesizing high-purity SNPs,with potential applications in advanced electronic devices.展开更多
Background Health promotion(HP)interventions delivered through sports clubs have demonstrated promising outcomes among men,but less is known about which aspects of the interventions work,for whom,and under what circum...Background Health promotion(HP)interventions delivered through sports clubs have demonstrated promising outcomes among men,but less is known about which aspects of the interventions work,for whom,and under what circumstances.This rapid realist review aimed to understand the contexts,mechanisms,and outcomes of HP interventions for men delivered through sports clubs.Methods A systematic literature search was conducted in February 2023 for studies published after 2013 in MEDLINE,Embase,and SPORTDiscus databases.Included studies:(a)were delivered by or in collaboration with sports clubs,(b)targeted men aged 18+years,and(c)reported 1 or more HP outcomes.A grey literature search was also performed.Studies were included in a realist synthesis based on richness and rigor.Hereafter,context-mechanism-outcome(CMO)configurations were developed.Results We identified and screened 3358 studies,finally including 59 studies describing 22 interventions.Most HP interventions were delivered in high income countries,included Caucasian men aged 35-65 years with overweight/obesity,and used professional sports clubs(mostly football)for recruitment and facilities.Quantitative HP outcomes were reported across 19 interventions.Of these 19 interventions,the majority reported on weight(n=18),physical activity(n=12),mental health(n=10),and diet(n=9).We identified 13 CMOs related to how HP interventions affected men's recruitment,engagement,and health behavior maintenance.Conclusion Our findings show that using sports clubs for HP interventions is effective for engaging men.Recruitment was facilitated by leveraging sports clubs’identity,addressing masculinity-related barriers,improving accessibility,and building trust.Engagement was enhanced through shared identity experiences,safe spaces,inclusive competition,and self-efficacy.However,there's limited evidence on behavior maintenance post-intervention,though involving community stakeholders seemed vital.In general,considerations should be made to avoid perpetuating traditional masculine norms,which may exclude some men and reinforce unhealthy behaviors.These findings can guide intervention development,emphasizing the need to harness men's perspectives in the process.展开更多
There are many clubs in my school.I am interested in Chinese culture,so I am a member of the Chinese Couplet Club.In the club,we learn to admire and write Chinese couplets.First,our teacher teaches us the basic rules.
Club Med北戴河黄金海岸度假村项目的设计理念源于基地本身,将Club Med简单、快乐、阳光的品牌文化和多元文化的特别度假理念融入设计中,倡导人与自然和谐共处的生活方式,体现京津冀独特的人文情怀,同时采用与环境相协调的建筑材料,融...Club Med北戴河黄金海岸度假村项目的设计理念源于基地本身,将Club Med简单、快乐、阳光的品牌文化和多元文化的特别度假理念融入设计中,倡导人与自然和谐共处的生活方式,体现京津冀独特的人文情怀,同时采用与环境相协调的建筑材料,融入环境的色彩,打造有特色、高品质、全新的度假产品,酒店的开业将引领秦皇岛黄金海岸进入全球高端度假人群之视野。展开更多
This paper explores the impact of student club development on the scientific literacy of vocational college students.As society increasingly values innovation and scientific literacy,vocational colleges bear a signifi...This paper explores the impact of student club development on the scientific literacy of vocational college students.As society increasingly values innovation and scientific literacy,vocational colleges bear a significant responsibility in cultivating students’overall quality.Taking the Modeling and Simulation student club as a case study,the research team conducted a 12-week study.The results indicate that various club activities aimed at enhancing scientific literacy have positively influenced the development of students’scientific competencies.Students’practical skills and innovative thinking have been effectively improved.Our research demonstrates the positive role of student clubs in enhancing the scientific literacy of vocational college students,providing valuable experience and references for the development of similar clubs in the future.展开更多
基金supported by the Suranaree University of Technology(SUT)Center of Excellence(CoE)on Advanced Functional Materials(AFM),School of Physics,Suranaree University of Technology,Nakhon Ratchasima,Thailand,the External Grants and Scholarships for Graduate Students,Suranaree University of Technology,Nakhon Ratchasima,Thailand,and the Research Network on Nanotechnology(RNN),Suranaree University of Technology,Nakhon Ratchasima,Thailand.
文摘High-purity SiO_(2)nanoparticles(SNPs)play a crucial role in various electronic applications,such as semiconductors,solar cells,optical fibers,lenses,and insulating layers,given their purity and particle size,which significantly impact device efficiency.This study fo-cuses on the synthesis and characterization of pure SNPs through the chemical etching of greater club rush.White powder SNPs were pre-pared using HCl etching,and their thermal behaviors were analyzed via thermogravimetric analysis/differential scanning calorimetry.Structural properties were investigated using X-ray fluorescence,scanning electron microscopy,and transmission electron microscopy.X-ray absorption near-edge structure was employed to assess the oxidation state of the SNPs.The morphology of the SNPs after the first etching was amorphous,with sizes ranging from 50 to 100 nm,which increased to 50-200 nm after the second etching.Despite this size variation,the SNPs maintained a high purity level of 99.8wt%SiO_(2),comparable with industry standards.Notably,the second etching with 0.1-M HCl significantly enhanced the purity level,achieving 99.8wt%SiO_(2)mass.Furthermore,HCl etching facilitated the formation of SiO_(2)in the Si^(4+)oxidation state,akin to industrial SNPs.These findings underscore the critical role of HCl etching in synthesizing high-purity SNPs,with potential applications in advanced electronic devices.
基金supported by the 5 Steno Diabetes Centers in Denmark,which are partly funded by the Novo Nordisk Foundation.
文摘Background Health promotion(HP)interventions delivered through sports clubs have demonstrated promising outcomes among men,but less is known about which aspects of the interventions work,for whom,and under what circumstances.This rapid realist review aimed to understand the contexts,mechanisms,and outcomes of HP interventions for men delivered through sports clubs.Methods A systematic literature search was conducted in February 2023 for studies published after 2013 in MEDLINE,Embase,and SPORTDiscus databases.Included studies:(a)were delivered by or in collaboration with sports clubs,(b)targeted men aged 18+years,and(c)reported 1 or more HP outcomes.A grey literature search was also performed.Studies were included in a realist synthesis based on richness and rigor.Hereafter,context-mechanism-outcome(CMO)configurations were developed.Results We identified and screened 3358 studies,finally including 59 studies describing 22 interventions.Most HP interventions were delivered in high income countries,included Caucasian men aged 35-65 years with overweight/obesity,and used professional sports clubs(mostly football)for recruitment and facilities.Quantitative HP outcomes were reported across 19 interventions.Of these 19 interventions,the majority reported on weight(n=18),physical activity(n=12),mental health(n=10),and diet(n=9).We identified 13 CMOs related to how HP interventions affected men's recruitment,engagement,and health behavior maintenance.Conclusion Our findings show that using sports clubs for HP interventions is effective for engaging men.Recruitment was facilitated by leveraging sports clubs’identity,addressing masculinity-related barriers,improving accessibility,and building trust.Engagement was enhanced through shared identity experiences,safe spaces,inclusive competition,and self-efficacy.However,there's limited evidence on behavior maintenance post-intervention,though involving community stakeholders seemed vital.In general,considerations should be made to avoid perpetuating traditional masculine norms,which may exclude some men and reinforce unhealthy behaviors.These findings can guide intervention development,emphasizing the need to harness men's perspectives in the process.
文摘There are many clubs in my school.I am interested in Chinese culture,so I am a member of the Chinese Couplet Club.In the club,we learn to admire and write Chinese couplets.First,our teacher teaches us the basic rules.
基金supported by a research project from Beijing Polytechnic(Fund number:2024X002-XYF,Project leader:Leguan Jie)。
文摘This paper explores the impact of student club development on the scientific literacy of vocational college students.As society increasingly values innovation and scientific literacy,vocational colleges bear a significant responsibility in cultivating students’overall quality.Taking the Modeling and Simulation student club as a case study,the research team conducted a 12-week study.The results indicate that various club activities aimed at enhancing scientific literacy have positively influenced the development of students’scientific competencies.Students’practical skills and innovative thinking have been effectively improved.Our research demonstrates the positive role of student clubs in enhancing the scientific literacy of vocational college students,providing valuable experience and references for the development of similar clubs in the future.
