Sampling Methods and Sample Populations in Quantitative Mass Communication Research Studies: A 15-Year Census of Six Journals     

Joseph Erba  Brock Ternes  Piotr Bobkowski  Tara Logan  Yuchen Liu 《Communication Research Reports》2018,35(1):42-47

This study evaluated the sampling methods and sample populations used in all U.S.-based survey and experimental mass communication studies published between 2000 and 2014 in six major journals (N = 1,173). Most studies used nonprobability samples, and more than half used student samples. Experiments used more nonprobability and student samples than surveys. Funded studies used more probability and nonstudent samples than nonfunded studies. Implications of results pertaining to population validity and interpretations of findings for mass communication research are discussed.  相似文献   

517字段用法争议分析     

常雅红 《图书馆杂志》2018,(1):79-83

  相似文献   

科研模式变革中的数据管理服务:实现开放获取、开放数据、开放科学的途径   总被引：1，自引：0，他引：1  

顾立平 《中国图书馆学报》2018,44(6):43-58

随着信息技术的发展与普及,全球学术交流模式总体朝着开放获取的趋势发展,信息时代的科学活动需要更多的数据开放和共享。开放数据是公众参与科学、推动社会进步的必要条件。无论是对于图书馆工作还是对于信息服务、知识服务来说,科研模式的变革都是一种新的挑战。与此同时,在此背景下,也产生了一种新的机遇,即与科研数据管理相关的一系列新内容,包括:明确科研数据管理各利益方;明确数据管理服务的主要内容;塑造科研数据开放共享文化,开展各个利益相关者之间的数据对话;进行科学数据开放共享各个环节的政策研究;明确数据馆员发挥的作用和职业价值。表6。参考文献70。  相似文献   

Research universities on the ResearchGate social networking site: An examination of institutional differences,research activity level,and social networks formed     

Weiwei Yan  Yin Zhang 《Journal of Informetrics》2018,12(1):385-400

As one of the largest active academic social networking sites, ResearchGate (RG) has been utilized by scholars to share publications, seek collaborators, communicate work in progress, and build scholarly reputation. This study collects data from RG users from 61 U.S. research universities at different research activity levels, as categorized by the Carnegie Classification of Institutions of Higher Education, to examine the impact of institutional differences on RG reputational metrics. The results confirm that RG is a research-oriented academic social networking site that closely and realistically mirrors the research activity level of institutions. With an increase in the research activity level of a university, its affiliated RG users tend to have higher RG scores, more publications and citations, and more profile views and followers, while the average number of reads of their publications and followees tend to be lower and fluctuant. In addition, RG users primarily follow others from institutions of a higher research activity level, forming virtual social networks centered around esteemed institutions. The study suggests academic social networks can serve as indicators in evaluation of research activities among research institutions, and such sites can be helpful and credible for acquiring resources, keeping informed about research, and promoting academic influence.  相似文献   

A comparison of two approaches for measuring interdisciplinary research output: The disciplinary diversity of authors vs the disciplinary diversity of the reference list     

Giovanni Abramo  Ciriaco Andrea D’Angelo  Lin Zhang 《Journal of Informetrics》2018,12(4):1182-1193

This study investigates the convergence of two bibliometric approaches to the measurement of interdisciplinary research: one based on analyzing disciplinary diversity in the reference list of publications, the other based on the disciplinary diversity of authors of publications. In particular we measure the variety, balance, disparity and integrated diversity index of, respectively, single-author, multi-author single-field, and multi-author multi-field publications. We find that, in general, the diversity of the reference list grows with the number of fields reflected in a paper’s authors’ list and, to a lesser extent, with the number of authors being equal the number of fields. Further, we find that when fields belonging to different disciplines are reflected in the authors’ list, the disparity in the reference list is higher than in the case of fields belonging to the same discipline. However, this general tendency varies across disciplines, and noticeable exceptions are found at individual paper level.  相似文献   

Technological research in the EU is less efficient than the world average. EU research policy risks Europeans’ future     

Alonso Rodríguez-Navarro  Ricardo Brito 《Journal of Informetrics》2018,12(3):718-731

We have studied the efficiency of research in the EU by a percentile-based citation approach that analyzes the distribution of country papers among the world papers. Going up in the citation scale, the frequency of papers from efficient countries increases while the frequency from inefficient countries decreases. In the percentile-based approach, this trend, which is uniform at any citation level, is measured by the e_p index that equals the P_{top 1%}/P_{top 10%} ratio. By using the e_p index we demonstrate that EU research on fast-evolving technological topics is less efficient than the world average and that the EU is far from being able to compete with the most advanced countries. The e_p index also shows that the USA is well ahead of the EU in both fast- and slow-evolving technologies, which suggests that the advantage of the USA over the EU in innovation is due to low research efficiency in the EU. In accord with some previous studies, our results show that the European Commission’s ongoing claims about the excellence of EU research are based on a wrong diagnosis. The EU must focus its research policy on the improvement of its inefficient research. Otherwise, the future of Europeans is at risk.  相似文献   

广东省中超职业足球俱乐部后备人才培养研究* ——以广东省恒大、富力足球俱乐部为例     

顾伟农  张红松  李政君 《广州体育学院学报》2016,(6):80-84

足球后备人才应走职业化培养道路已经得到广泛认同。但我国足球职业化的发展已经走过近20年，其成绩却一直不理想。出现这种现象的原因是多方面的，主要是由于青少年足球后备人才的足球职业化培养不够成功。近年来广东省中超职业足球俱乐部经过不懈的努力成绩不错，但其后备人才的职业化培养仍不容乐观。研究的重点在于了解广东省高水平中超足球俱乐部后备人才培养现状，找出职业化培养后备人才的不足，为提高后备人才的质量，促进足球运动发展提供参考的理论依据和对策。  相似文献   

“一带一路”战略下广西-东盟武术文化场域建设的思考     

唐露铭 《中华武术(研究)》2020,(2):97-98,103

为进一步促进武术通过广西向东南亚的发展,本文基于布迪厄“场域理论”,提出建设中国武术文化场域,提升中国武术的符号价值。在充分认识和理解东盟各国的文化、历史、宗教信仰以及本土武术文化基础之上,通过加强武术词汇翻译,提升武术传播者的东盟语言能力;充分利用“儒家文化圈”文化共通之处,发挥中国武术文化内涵之用;激发武术文化场域各要素间的有机配合,推进官方及民间武术传播的“走出去”。  相似文献   

Zeeman磁场对有节点非常规超导体节点结构的影响     

陈崇巨  金彪 《中国科学院大学学报》2017,34(3):289-295

在大部分非常规超导体中，准粒子激发谱中存在着“线节点”或“点节点”。 这些节点的存在，导致热力学量和输运系数在低温区的温度变化呈现幂次律。解析分析表明，外加的弱Zeeman磁场会显著影响节点的结构。 尤其是，预言在某些情况下Zeeman磁场可能在费米面上诱导出“面节点”。计算若干自旋单态和自旋三重态的电子比热，结果显示外加的弱Zeeman磁场对节点结构的影响会导致幂次律产生巨大变化。  相似文献   

高等体育教育供给侧结构性改革的发展理念与策略研究     

叶欣  陈绍军 《武汉体育学院学报》2017,51(7):85-89

围绕为什么进行高等体育教育供给侧结构性改革，契合"适应和引领新常态发展的重大创新，适应我国新常态发展的必然要求"这一理论问题，从供给侧结构性改革的导向、目标和内容等方面就如何实施高等体育教育的供给侧结构性改革提出发展理念，继而在教育活动主体结构、教育场域结构和教育创新层次结构等方面对高等体育教育的结构性改革进行策略研究，以期有效改善存在于我国高等体育教育中的结构性问题。  相似文献