Investigating the quality of interactions and public engagement around scientific papers on Twitter     

Fereshteh Didegah  Niels Mejlgaard  Mads P. Sørensen 《Journal of Informetrics》2018,12(3):960-971

This study explores science communication on Twitter by investigating a sample of tweets referring to academic papers in five different scientific fields. The specifications of science communicators on Twitter, the characteristics of those who initiate actions (by tweeting), the extent and quality of reactions (retweeting), individual and group interactions, and the distribution of tweets across types of engagement in the process of science communication (i.e., dissemination, consultation, and evaluation) were explored. A broad array of actors is involved in the communication of science on Twitter, with individual citizens and individual researchers playing an important role. In principle, this is promising for creating direct interaction, which can be difficult through more traditional mass media. The vast majority of communication activities regarding academic papers is undigested dissemination with almost no sign of debate, contestation, or collective reflection. Another general finding of this study is that bot accounts play a major role in the science communication landscape on Twitter.  相似文献   

Impact Factors and the Central Limit Theorem: Why citation averages are scale dependent     

Manolis Antonoyiannakis 《Journal of Informetrics》2018,12(4):1072-1088

Citation averages, and Impact Factors (IFs) in particular, are sensitive to sample size. Here, we apply the Central Limit Theorem to IFs to understand their scale-dependent behavior. For a journal of n randomly selected papers from a population of all papers, we expect from the Theorem that its IF fluctuates around the population average μ, and spans a range of values proportional to $\sigma /\sqrt{n}$, where σ² is the variance of the population's citation distribution. The $1/\sqrt{n}$ dependence has profound implications for IF rankings: The larger a journal, the narrower the range around μ where its IF lies. IF rankings therefore allocate an unfair advantage to smaller journals in the high IF ranks, and to larger journals in the low IF ranks. As a result, we expect a scale-dependent stratification of journals in IF rankings, whereby small journals occupy the top, middle, and bottom ranks; mid-sized journals occupy the middle ranks; and very large journals have IFs that asymptotically approach μ. We obtain qualitative and quantitative confirmation of these predictions by analyzing (i) the complete set of 166,498 IF & journal-size data pairs in the 1997–2016 Journal Citation Reports of Clarivate Analytics, (ii) the top-cited portion of 276,000 physics papers published in 2014–2015, and (iii) the citation distributions of an arbitrarily sampled list of physics journals. We conclude that the Central Limit Theorem is a good predictor of the IF range of actual journals, while sustained deviations from its predictions are a mark of true, non-random, citation impact. IF rankings are thus misleading unless one compares like-sized journals or adjusts for these effects. We propose the Φ index, a rescaled IF that accounts for size effects, and which can be readily generalized to account also for different citation practices across research fields. Our methodology applies to other citation averages that are used to compare research fields, university departments or countries in various types of rankings.  相似文献   

Dimensions: A competitor to Scopus and the Web of Science?     

Mike Thelwall 《Journal of Informetrics》2018,12(2):430-435

Dimensions is a partly free scholarly database launched by Digital Science in January 2018. Dimensions includes journal articles and citation counts, making it a potential new source of impact data. This article explores the value of Dimensions from an impact assessment perspective with an examination of Food Science research 2008–2018 and a random sample of 10,000 Scopus articles from 2012. The results include high correlations between citation counts from Scopus and Dimensions (0.96 by narrow field in 2012) as well as similar average counts. Almost all Scopus articles with DOIs were found in Dimensions (97% in 2012). Thus, the scholarly database component of Dimensions seems to be a plausible alternative to Scopus and the Web of Science for general citation analyses and for citation data in support of some types of research evaluations.  相似文献   

高校文科专业文献学教学的反思     

余全介 《重庆第二师范学院学报》2011,24(4):158-161

针对文献学课程作为选修课常常受到文献检索等课程的挤压,作为必修课又受到教学对象主、客观两方面因素的制约的情况,提出文献学对于文史哲等专业的治学研究有指导作用,对于学生知识体系的建构和完善有着非同一般的意义,应该成为文科专业的基础课。改进文献学的教学现状,教师必须注意文献学观念的转变,注意与国学教育相融合,提升自己的学术含量,提高自己的文化品格,实现教学策略的调整。  相似文献   

Elementary school children’s understanding of science: The implementation of an extracurricular science intervention     

《Contemporary educational psychology》2017

The promotion of students’ achievement and competence in the so-called STEM disciplines is one cornerstone of current educational research and practice. In particular, as early as elementary school, the fostering of an adequate understanding of science is a normative goal of science education. It facilitates students’ science learning and enables them to understand the nature and development of scientific knowledge. Based on the relevance of the promotion of young children’s understanding of science, a corresponding science intervention was recently developed and successfully evaluated in a first study under highly controlled conditions. The goal of the present study was to investigate the effectiveness of this intervention when implemented in practice. One hundred seventeen third- and fourth-grade students and 10 trained course instructors participated in this study. We applied a randomized block design with waitlist control groups and repeated measures. The results revealed that children assigned to the intervention compared with children assigned to the waitlist control group showed better inquiry-related methodological competencies (a better understanding of the scientific inquiry cycle and experimentation strategies) and a higher need for cognition. The findings point to the successful implementation of the intervention and are compared with the results of the first study.  相似文献   

开放大学建设深度解读应聚焦的五个重点问题     

彭坤明 《江苏广播电视大学学报》2015,(1)

边解读、边探索，是开放大学建设实践模式的重要特征。开放大学的深化探索需要深度的解读。基于项目试点阶段经验的总结，立足于开放大学建设的长远目标，深度解读应聚焦于国家战略、规律遵循、类型创新、新的常态、难题突破这五个主要方面。  相似文献   

从国家社会科学基金项目课题指南论体育学术期刊传播的导向——以2016年国家社会科学基金项目课题指南（体育学）为例     

付志华  简德平  刘静  汤惠琼 《北京体育大学学报》2016,39(12):44-49+81

摘要：国家社会科学基金项目课题指南正越来越深刻地影响着学术期刊编辑的选题策划，进而影响到编辑传播行为的导向。研究试图为编辑传播行为提供科学的理论指导，以体育学术期刊的传播导向为研究对象，采用综合分析法与文献资料法，以2016年国家社会科学基金项目课题指南（体育学）为例，阐述了该课题指南从体育改革与发展、体育与健康促进、全民健身、体育产业、体育法学、公共体育服务、体育传播学等领域对体育学术期刊编辑选题策划的借鉴价值及其传播行为的导向价值。体育学术期刊编辑在传播实践中，应注重参考国家社会科学基金项目课题指南，力求提升选题策划的整体质量，不断提升体育学术期刊的学术影响力与社会美誉度。该研究有助于学者与编者更精准地把握好研究方向与选题方向，进一步繁荣体育人文社会学领域的学术研究。  相似文献   

浅谈语文教学中的创新教育     

陈亲泽 《中国教育研究与创新》2007,4(2):42-43

语文教学中要培养学生的创新精神，就要充分挖掘学生的想象力，培养学生大胆设想、大胆尝试的能力。这些能力的培养就对老师的课堂教学提出了更高的要求，要大胆抛弃传统的教学模式，大胆创新。  相似文献   

用“远程学习圈理论”分析网络学习管理系统   总被引：4，自引：0，他引：4  

菅光宾  孙淑艳 《现代教育技术》2005,15(1):28-32,36

LMS 是网络教育和基于网络培训的支撑系统。本文首先介绍了两种对LMS 进行功能分类和评价的理论,然后通过借鉴“远程学习圈理论”提出对LMS 进行功能分析的框架,最后利用这个框架对三个知名的LMS 进行分析,旨在为 企业和学校引进LMS 时提供参考和借鉴。  相似文献   

数据治理——图书馆事业的发展机遇   总被引：1，自引：0，他引：1  

顾立平 《中国图书馆学报》2016,42(5):40-56

数据驱动发现成为一种新的科学进步路线,产生了新的知识服务对象:愈加重视数据的科学家和工程师、数据科学家、数据工程师、数据分析师、公民科学家等。数据获取需要依靠国家的行政命令、资助机构的政策、研究机构和大学的管理办法等。数据共享存在于不同学科,而且已具备了基础设施,诸如:数据中心、数据云、数据知识库与数据期刊、信息技术中心、数字资源中心等。数据重用需要公共部门、企业、公众、利益相关方在“尽可能地开放,尽责任地封闭”前提下,采取协调一致的行动。在这里,数据馆员扮演重要角色。数据治理生态体系需要图书馆执行数据获取、数据共享、数据重用的政策。通过不断寻找和搜集最佳实践案例,图书馆可以支持数据治理。参考文献79。  相似文献