我国高校科研人员Altmetrics评价需求差异研究     

沈兰妮  韩毅 《图书情报工作》2020,64(23):40-52

[目的/意义] 随着Altmetrics研究日益深入，有效识别Altmetrics评价的利益相关方需求对评价指标设计及数据基础设施建设具有重要意义。[方法/过程] 以高校科研人员为对象，利用半结构访谈法识别我国高校科研人员的Altmetrics评价需求，采用问卷调查法获取数据并检验识别出高校科研人员Altmetrics评价需求的差异性。[结果/结论] 研究发现，我国高校科研人员主要有7类Altmetrics评价需求，分别是：研究评价，成果展示，需求发现，学术认可，交流传播，成果操作，学科发展；不同年龄组别高校科研人员在"研究评价"方面有差异，"51-60岁"年龄组较其他年龄组在"研究评价"方面的需求明显偏低；除"交流传播"外，人文学科的6个Altmetrics评价功能需求强度均低于社会学科和自然学科，自然科学与社会科学间的评价需求完全一致；除"研究评价"功能需求在教师与学生存在差异外，6个Altmetrics评价需求对所有不同身份类别高校科学人员没有差异；7类Altmetrics评价需求对高校科研人员具有较高的普遍适用性。  相似文献   

新媒介语境下的受众主体性     

吴雯 《安庆师范学院学报(社会科学版)》2018,37(3):103-106

伴随互联网技术和智能技术的发展,新媒介的形式愈来愈多元。当代新媒介具有多屏、交互、智能等属性,在新的媒介语境下,受众已经不再仅仅是纯粹的接受者,而是具有传播与接受两者兼有的属性。新媒介语境下,受众主体性具有主体倾向性、自主创造性、自由散播性三大特征。与此同时,受众对信息处理的方式也应重新界定。  相似文献   

Preschool teachers and classroom aides: Same context,similar perceptions of children's behaviors?          下载免费PDF全文

Sofia O. Major  Maria J. Seabra‐Santos  Maria F. Gaspar 《Psychology in the schools》2018,55(7):801-814

This study explored the correspondence and differences between school staff perceptions of preschool children's social skills and behavior problems. One hundred preschoolers were assessed by 14 pairs of teachers and classroom aides with the Preschool and Kindergarten Behavior Scales – 2^nd Edition (PKBS‐2 Portuguese version). Indexes of agreement and disagreement were calculated. Risk levels and item analyses of PKBS‐2 scores according to both informants' ratings were compared. A higher level of agreement was obtained for social skills scores than for behavior problems (mean correlation of .62). No statistically significant differences between informants were obtained for the risk levels, and item analyses revealed a similar pattern of behaviors that were most and least rated by both informants. Results indicate that the classroom aides' perspective on preschool assessment represents a reliable input, which justifies that they network with teachers in addressing preschoolers' social‐emotional and behavioral challenges.  相似文献   

从信息检索系统评估到知识服务平台评估     

李月琳  韩宏亮 《图书情报工作》2019,63(1):52-59

[目的/意义]随着知识服务平台的发展，如何通过评估改善知识服务平台的功能和设计以更好地服务于用户成为重要的问题。本文旨在探讨知识服务平台的评估要素和评估标准，为知识服务平台的评估实践提供理论指导。[方法/过程]从信息检索系统评估出发，回顾和梳理信息检索系统评估、数字图书馆评估的相关研究和理论模型、数字图书馆的评估要素和标准。[结果/结论]基于总结和归纳以往信息服务类系统的评估要素，结合知识服务平台的特征，阐述知识服务平台评估的要素和评估标准。  相似文献   

高风险运动项目运动员感觉寻求与冒险行为的关系及其影响因素研究进展          下载免费PDF全文

祝大鹏  周雯 《体育科研》2020,(4):67-74

研究采用文献综述法分析了国内外关于高风险运动项目运动员感觉寻求与冒险行为之间的关系及其影响因素，从运动员个人和运动项目两个方面，分析不同因素对运动员感觉寻求和冒险行为的影响效应及作用过程。结果表明：（1） 感觉寻求是高风险运动项目运动员做出冒险行为的重要影响因素之一；（2）不同高风险运动项目之间，运动员的感觉寻求和冒险行为存在差异，未表现出同质性；（3）高风险运动项目运动员的感觉寻求与冒险行为受到运动员个人（运动动机、风险感知调控能力、情绪、人格、经验与水平、性别与年龄）和外部环境（运动项目、运动安全装备）两方面因素的共同作用。  相似文献   

地球椭球模型中太阳位置计算的改进     

李文  赵永超 《中国科学院大学学报》2019,36(3):363-375

准确高效的太阳位置计算在遥感辐射定标、太阳能获取等多个领域具有重要应用价值。针对传统太阳赤纬角算法对不同年份数据差异考虑不足的问题，采用数值拟合法提出适用于不同年份的改进公式。根据误差曲线所呈现的周期性，采用傅里叶展开法提出以4年为周期的赤纬角改进算法，并推导出地球椭球模型下的太阳高度角公式。蒙气差影响太阳位置观测与计算。针对传统蒙气差算法在低仰角下误差较大的问题，提出0°~30°仰角下蒙气差的改进公式。把改进算法与相应的传统算法进行误差对比，结果表明，改进算法在太阳赤纬角、太阳高度角、低仰角下蒙气差计算的误差均明显降低，计算过程简单高效，符合相关工程项目应用需求。  相似文献   

A Small‐Scale Randomized Efficacy Trial of the Identity Project: Promoting Adolescents’ Ethnic–Racial Identity Exploration and Resolution          下载免费PDF全文

Adriana J. Umaña‐Taylor  Sara Douglass  Kimberly A. Updegraff  Flavio F. Marsiglia 《Child development》2018,89(3):862-870

Adolescents’ ethnic–racial identity (ERI) formation represents an important developmental process that is associated with adjustment. The Identity Project intervention, grounded in developmental theory, was designed to engage adolescents in the ERI processes of exploration and resolution. The current small‐scale efficacy trial involved an ethnic–racially diverse sample of adolescents (N = 215; M_age = 15.02, SD = .68) from eight classrooms that were randomly assigned by classroom to the intervention or attention control group. Differences between conditions in ERI exploration at Time 2 were consistent with desired intervention effects; furthermore, higher levels of ERI exploration at Time 2 predicted increases in ERI resolution at Time 3 only for youth in the treatment condition. Findings provide preliminary evidence of program efficacy.  相似文献   

瑜伽对田径运动员运动性疲劳恢复的可行性分析     

刘平  苑廷刚  程泓人  韩鹏鹏 《体育科技文献通报》2020,(1):46-48

本文使用文献资料法、综述法、比较法、逻辑分析法等科研方法,针对瑜伽对心理和生理功能的作用和运动员的运动性疲劳两方面进行综述对照研究,探究得出:将瑜伽放松练习运用于田径运动员运动性疲劳恢复中的意义,并且提出将瑜伽练习运用于田径运动员的运动性疲劳恢复训练当中。  相似文献   

Wearable skin-like optoelectronic systems with suppression of motion artifacts for cuff-less continuous blood pressure monitor     

Haicheng Li  Yinji Ma  Ziwei Liang  Zhouheng Wang  Yu Cao  Yuan Xu  Hua Zhou  Bingwei Lu  Ying Chen  Zhiyuan Han  Shisheng Cai  Xue Feng 《国家科学评论(英文版)》2020,7(5):849

According to the statistics of the World Health Organization, an estimated 17.9 million people die from cardiovascular diseases each year, representing 31% of all global deaths. Continuous non-invasive arterial pressure (CNAP) is essential for the management of cardiovascular diseases. However, it is difficult to achieve long-term CNAP monitoring with the daily use of current devices due to irritation of the skin as well as the lack of motion artifacts suppression. Here, we report a high-performance skin-like optoelectronic system integrated with ultra-thin flexible circuits to monitor CNAP. We introduce a theoretical model via the virtual work principle for predicting the precise blood pressure and suppressing motion artifacts, and propose optical difference in the frequency domain for stable optical measurements in terms of skin-like devices. We compare the results with the blood pressure acquired by invasive (intra-arterial) blood pressure monitoring for >1500 min in total on 44 subjects in an intensive care unit. The maximum absolute errors of diastolic and systolic blood pressure were ±7/±10 mm Hg, respectively, in immobilized, and ±10/±14 mm Hg, respectively, in walking scenarios. These strategies provide advanced blood pressure monitoring techniques, which would directly address an unmet clinical need or daily use for a highly vulnerable population.  相似文献   

‘Nowhere that fits’: the dilemmas of school choice for parents of children with Statements of special educational needs (SEN) in England     

Meanu Bajwa‐Patel  Cristina Devecchi 《Support for Learning》2014,29(2):117-135

Giving parents a choice with regard to their children's education has been central to the political discourse of school reform at least since the 1988 Education Reform Act (ERA). With regard to children with a Statement of special educational needs (SSEN), a plethora of policies and laws have given parents the right not only to choose a school, but also to appeal to decisions in the best interest of their children. Yet, despite the discourse of school choice, the implementation and practice of such reforms is neither assured nor simple. Participants in this study indicated that they have little choice of suitable provision and are having to compromise either the academic or the social aspects of their child's schooling. This article argues that for many parents whose children have a Statement of SEN, the choice of a school is often a dilemma, as ‘nowhere seems to fit’.  相似文献