发光层厚度对红光磷光聚芴电致发光性能的影响     

马良  陈婷  陈为健 《闽江学院学报》2010,31(2):100-103

文章采用喹啉氮杂环类锒配合物[（PPQ）2Ir（acac）]为客体,以聚芴和2-（4-二苯基）-5-（4-叔丁基苯基）-1,3,4-噁二唑（PBD）为主体,研究了不同发光层厚度对有机电致发光器件性能的影响．随着发光层厚度的增加,相同电压下器件的电流密度和发光亮度逐步减小,表现出明显的电荷捕获机制．当厚度达到70nm时,得到了发光亮度为1792cd／m^2,发光效率为6．16cd／A的高性能红光器件．  相似文献   

边境民族地区扶贫与和谐社会建设探微——以云南省德宏傣族景颇族自治州为例     

杨东萱 《四川教育学院学报》2010,26(6):15-17,21

对边境民族地区扶贫开发,是构建和谐社会的必然要求。以云南省德宏傣族景颇族自治州为例,从构建和谐社会的视角,分析边境民族地区贫困的表现形式,阐述与构建边境民族地区和谐社会相协调的扶贫体制机制。  相似文献   

运动员生物护照应用解析——以“阿姆斯特朗兴奋剂事件”为例          下载免费PDF全文

马国全 《河北体育学院学报》2015,29(3):72-78

以“阿姆斯特朗兴奋剂事件”为切入点,对运动员生物护照(ABP)的理论机制及ABP在检测和防范兴奋剂中的有效性的相关研究进行综述;并运用ABP技术对“阿姆斯特朗兴奋剂事件”展开深入剖析.结果显示:ABP的确行之有效,其通过纵向监控与分析运动员生物标记的异常,能够准确判断运动员是否使用了禁用物质或方法.但此方法还不能作为判定运动员使用兴奋剂的必然依据.  相似文献   

白俄罗斯皮划艇协会与国际皮划艇联合会体育仲裁案例评述          下载免费PDF全文

邵沁雨 《体育科研》2018,(1):17-25,34

通过对2016年白俄罗斯皮划艇协会与国际皮划艇联合会体育仲裁案例的分析,得出研究结论：禁用药物超长的代谢时间不能成为反兴奋剂规则具有溯及力的理由;虽然《世界反兴奋剂条例》第11条的规定因为存在"集体项目"这一前提而没有违反个人责任原则,但该条第12条由于规定得过于简单仍然违反了该原则;国家司法机关刑事诉讼程序中发现的兴奋剂药物证据,在刑事诉讼程序终止而证据未经质证的情况下,不能直接作为兴奋剂违规行为的认定证据。  相似文献   

确认体内违禁物质来源对兴奋剂违规非故意认定的意义——从阿德米诉欧洲足联案谈起          下载免费PDF全文

王倩倩 《体育科研》2018,(3):22-29,39

世界反兴奋剂条例在“无过错和无重大过错”的定义中明确要求运动员要证明违禁物质如何进入体内,而关于“非故意”则无明文规定。在阿德米兴奋剂违规案中,国际体育仲裁院在运动员未能证实样本中违禁物质来源的前提下,运用优势证据认可其违规行为为非故意,将4年的禁赛期缩减为2年。通过对该案例的分析和对类似案件的对比,得出结论：运动员的举证责任和他获得的利益原则上成正比,运动员必须确立违禁物质如何进入体内以证明自己无过错或无重大过错,从而达到免除或缩减禁赛期的目的,参照上述规则,对于非故意可以减少一半的禁赛期这样巨大的利益也应当明确运动员的这一举证责任是必需的。  相似文献   

Anabolic–androgenic steroid use and correlates in Norwegian adolescents     

Morten Renslo Sandvik  Anders Bakken  Sigmund Loland 《European Journal of Sport Science》2018,18(6):903-910

This paper surveys the prevalence and correlates of anabolic androgenic steroids (AAS) use among Norwegian adolescents, and examines the degree to which sports participation is a mediating or moderating factor to well-known correlations between AAS use and problem behaviour. The data come from the “Ungdata” study, a cross-national youth survey system offered to all municipalities in Norway (response rate: 74%, N?=?77,572). The study demonstrates a lifetime prevalence of AAS use of 1.27% and a higher prevalence among boys (1.81%) than girls (0.76%). The analyses show that AAS use is clearly related to problem behaviour such as violence and other substance use. When controlling for problem behaviour, there are no correlations between AAS use and exercising in a sports club or on one’s own, whilst there is a weak positive correlation between AAS use and exercising in a gym or engaging in other forms of physical exercise such as dancing or martial arts. These patterns are more or less the same for boys and for girls. We conclude that adolescent AAS use is a low-prevalence phenomenon that primarily takes place in smaller subgroups of individuals who engage in other forms of problem behaviour as well.  相似文献   

Charge transport in conducting polyaniline co-doped with sulfosalicylic acid and dodecylbenzoyl sulfonic acid     

MA Li  YAN Jun  GAN Meng-Yu  HE Ling  LI Jian-Feng 《重庆大学学报(英文版)》2009,8(3):170-174

We prepared conducting polyaniline （PAn） co-doped with sulfosalicylic acid （SSA） and dodecylbenzoyl sultonic acid （DBSA） in micro-emulsive polymerization, and studied its charge transport behaviors based on the measurement of its electrical conductivity in the temperature range between 203 K and 298 K. The conductivity was found to increase with temperature, similar to the case in semiconductors. Analyzing the experimental data with three models, namely the charge-energy-limitedtunneling model, Kivelson model and the three-dimensional variable range hopping （3D-VRH） model demonstrated that these models all describe well the charge transport behaviors of PAn co-doped with SSA and DBSA within the mentioned temperature range. From calculation with the 3D-VRH model, the hopping distance of the conducting PAn is obviously larger than its localization length. The PAn doped with SSA and DBSA enjoys desirable crystallinity due to the co-doping of two functional sulfonic acids. The macroscopic conductivity may correspond to three-dimensional transport in the network of the bundles, and the metallic islands may be attributed to quasi-one-dimensional bundles.  相似文献   

Elite athletes' attitudes towards the use of placebo-induced performance enhancement in sports     

《European Journal of Sport Science》2013,13(4):315-321

Abstract

While an increasing number of research is devoted to the understanding of placebo effects in sports, athletes' experiences with and attitudes towards the use of placebo for performance enhancement remain poorly understood. In this study, 79 elite athletes from different sports were surveyed on five issues related to placebo use in sports. Results showed that 47% of the athletes have experienced placebo effects in the past. A majority of the athletes (82%) thought that placebos could affect their sports performances. A wider use of placebos in sport settings was endorsed more by those who have experienced placebo effects in the past than those who did not (P = .005). Regardless of past experience with placebo, more than half of the athletes (53%) would accept an unknown but legitimate substance from the coach, and 67% of them would not mind a placebo-linked deception if that was effective. These findings confirm that most elite athletes believe in the power of placebos in enhancing sports performance, and those having a positive past experience exhibit slightly more favourable attitudes in contrast to those without such experiences.  相似文献   

Contaminated nutritional supplements – legal protection for elite athletes who tested positive: A case report from Germany     

H Striegel  G Vollkommer  T Horstmann  AM Niess 《Journal of sports sciences》2013,31(7):723-726

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兴奋剂问题的高学历化倾向初探——基于外显和内隐的态度研究     

柳建兴  耿雅津 《南京体育学院学报(社会科学版)》2013,(6):118-122

兴奋剂问题的高学历化倾向日益引起社会对高校竞技运动发展的担忧,而针对高校兴奋剂问题的干预,将其关在规则的牢笼里具有重要的社会价值和现实意义。本研究基于双态度理论模型,采用自我报告和IAT实验深入地分析高校运动员兴奋剂使用的内在驱动机制和容忍度,并提出侧重高校大学生认知和行为层面的干预,强化其规则意识以及降低其对兴奋剂的容忍度是促进高校竞技体育回归本原的重要着力点,进而更好的实现运动员、竞技体育和整个社会的和谐发展。  相似文献