Decomposing social and semantic networks in emerging “big data” research     

Han Woo Park  Loet Leydesdorff 《Journal of Informetrics》2013,7(3):756-765

This paper examines the structural patterns of networks of internationally co-authored SCI papers in the domain of research driven by big data and provides an empirical analysis of semantic patterns of paper titles. The results based on data collected from the DVD version of the 2011 SCI database identify the U.S. as the most central country, followed by the U.K., Germany, France, Italy, Australia, the Netherlands, Canada, and Spain, in that order. However, some countries (e.g., Portugal) with low degree centrality occupied relatively central positions in terms of betweenness centrality. The results of the semantic network analysis suggest that internationally co-authored papers tend to focus on primary technologies, particularly in terms of programming and related database issues. The results show that a combination of words and locations can provide a richer representation of an emerging field of science than the sum of the two separate representations.  相似文献   

从SCI论文统计分析看肉苁蓉研究水平及发展     

刘渠华  李宏建  李文芯 《科技广场》2014,(6):103-107

根据SCI收录论文的统计数据,分析了随着肉苁蓉研究的发展和学科领域的不同,科研人员的研究成果在SCI收录论文上所反映发生的差异和变化,并以此为依据,对肉苁蓉领域的研究、应用和发展提出了意见。  相似文献   

充气梁型篦式冷却机的综合改造应用     

钟源 《大众科技》2014,(5):48-50

切合自身工艺、安装条件,主要对篦冷机一段篦床进行改造,合并扩大一风室;将前十二排篦梁全部换掉,改成了十三排;前五排改成斜坡式固定充气梁,分成两个区域供风;后段篦梁全部采用充气梁,并加强该区域冷却能力;同时改进设备密闭性。改造完成后,缓解了因安装高度不足引起的抽风能力不足的制约,热效率提高,锻烧煤耗、熟料易磨性等各项指标均有提升,设备故障率降低。对相同规模充气梁型篦冷机的改造具有良好的借鉴意义。  相似文献   

国际三大检索系统论文作者机构名称问题研究——以高校机构名称为例     

唐金玲 《情报探索》2014,(9):80-84

以国际三大检索系统SCI、EI和ISTP为研究对象,对高校机构名称进行检索,发现其存在诸多问题,认为论文作者对所属机构写法不统一、不规范,编辑或数据商录入、翻译等差错是造成问题的主要原因。从图书馆员、作者、期刊或数据库编辑、机构政策制订者或管理者几个方面,对规范机构名称提出建议。  相似文献   

一阶常系数线性微分方程组“对称型”的初等解法再讨论     

赵临龙 《四川三峡学院学报》2013,(3):8-11,32

利用代数方程的初等解法,给出＂对称型＂的一阶常系数线性微分方程组,化为一阶线性微分方程求解定理.  相似文献   

Science as a classed and gendered endeavor: Persistence of two white female first‐generation college students within an undergraduate science context     

Rachel E. Wilson  Julie Kittleson 《科学教学研究杂志》2013,50(7):802-825

  相似文献   

关于“第三信号”理论的思考——与王令训教授商榷     

姚洋 《怀化师专学报》2013,(1):37-38

И．П．巴甫洛夫于1932年提出了从本质上区别人与动物大脑反射活动的学说——两种信号系统学说。巴甫洛夫把以现实的事物为条件刺激建立起来的紊件反射称为第一信号系统。人由于社会生活和劳动,在第一信号系统之外进而产生了第二信号系统。第二信号即第一信号的信号,是以说出的、听到的、看见的语词的形式表现出来的。王令训教授在怀化学院学报2012年第1期发表的“论第三信号”一文提出了第三信号理论,认为第三信号是第二信号的代表,如“www”代表全球广域网络,“√”是“开平方”的代表等等,笔者认为这种理论有待商榷。  相似文献   

Dropout from Secondary Education: all's well that begins well     

Kristof De Witte  Nicky Rogge 《European Journal of Education》2013,48(1):131-149

Despite the increased attention to students leaving secondary education without a diploma numerous students still dropout yearly. This paper makes a distinction between the ‘individual perspective’ and the ‘institutional perspective’ of dropping out. The former is explored by multinominal logit models. We observe that particularly motivation of the student and interest in schooling of his/her parents are crucial predictors of the individual dropout decision. The institutional perspective is examined by ordered logit models. In particular, we discuss the influence of the first year of secondary education by analyzing the large differences in the number of dropouts in Dutch first year classes. We observe that, more than motivation, the first year of secondary education is crucial in shaping the dropping out decision.  相似文献   

以用为先的精品课程网站建设探究     

王文广  夏启寿 《河北广播电视大学学报》2013,(3):78-80

建设精品课程要注重以生为本,以用（学习者用户）为先。在建设时要考虑学习者使用需求,同时吸纳教育技术专家、网站设计制作专业人员参与。在创建之初就应考虑后期的维护、更新,以便为学习者创建易用、乐用的优秀精品课程网站。教育管理部门精品课程评价标准要与时俱进,对已有精品课程更要加强动态管理,最终提高精品课程的质量。  相似文献   

(Re)Producing Mathematics Educators: A sociological perspective     

Andrew Noyes 《Teaching Education》2013,24(3):243-256

Whilst participation in higher education has increased dramatically over the last two decades, many universities are only now beginning to pay more attention to the learning experiences of first year students. It is important for universities to understand how first year students conceive of learning and knowing in order to promote effective approaches to learning. Even though an extensive body of research demonstrates that beliefs about learning and knowing influence student approaches to learning and learning outcomes, there has been no Australian research that has investigated this critical learner characteristic across first year university students. This paper reports on preliminary data from an ongoing longitudinal study designed to investigate first year students’ beliefs about knowing and learning (epistemological beliefs). Students from teacher education and creative industry faculties in two Australian universities completed the Epistemological Beliefs Survey (EBS) in the first week of their first semester of study. A series of one‐way ANOVA using key demographics as independent variables and the EBS factor scores as dependent variables showed that epistemological beliefs were related to the course of study, previous post‐school education experience, family experience at university, gender, and age. These data help us to understand students’ beliefs about learning and knowing with a view to informing effective learning in higher education.  相似文献