Online field experiments     

Daniel Muise 《亚洲交流杂志》2019,29(3):217-234

ABSTRACT

Changes in information communication technology across the Asian region have altered our field substantively and methodologically. The rapid growth of digitized communications allows us to find new purchase in examining questions fundamental to our understanding of communication theories, norms, and practices across Asia. While methods such as text mining and user analytics are increasingly popular among computational scholars, here, we focus on online field experiments, an approach to studying communication that has the potential to overcome many existing obstacles to social scientific inquiry but one that has been used relatively rarely in Asia. In this paper, we discuss what online field experiments are and how they differ from traditional experiments as well as online lab and survey experiments. We show how researchers can go about designing and implementing online field experiments, focusing on issues where online field experiments differ from their traditional counterparts – legal and ethical considerations, construct validity, randomization and spillover, and statistical analyses. Finally we discuss how online field experiments can advance our understanding of communication in Asia by helping researchers to gain insight and make causal inferences on attitudes, behaviors, and interactions that were previously unobservable ?.  相似文献   

仿真实验在药物分析实验教学中的应用     

李泽友  姜月霞  黄艳  张俊清 《中国科教创新导刊》2011,(8):140-140

结合本校的实际情况,对目前药物分析实验教学中存在的问题进行分析,讨论了仿真实验在实验教学中的作用、弊端及对策。  相似文献   

幕课的发展、特性和建设探析     

杨晓萍  张安琪  张贵学 《黑龙江教育学院学报》2015,(2):61-63

随着幕课在中国教育界的迅猛发展,其已经受到了高校教师的重视。什么是好的幕课,如何制作一门好的幕课,如何在大规模在线教学领域占一席之地,已经成为每一个高校教师必须要思考的问题。基于此,就幕课的起源发展和特性进行综述,剖析理想幕课的模式和在幕课建设中应注意的问题,以期为高等院校幕课建设提供参考和借鉴。  相似文献   

Delineation of the Structural Elements of Oriental Liver Fluke PLA2 Isoforms for Potent Drug Designing     

Gururao Hariprasad  Divya Kota  Sundararajan Baskar Singh  Alagiri Srinivasan  Souparno Adhikary 《Indian journal of clinical biochemistry : IJCB》2014,29(4):430-441

Clonorchis sinensis or the Chinese liver fluke is one of the most prevalent parasites affecting a major population in the oriental countries. The parasite lacks lipid generating mechanisms but is exposed to fatty acid rich bile in the liver. A secretory phospholipase A₂, an enzyme that breaks down complex lipids, is important for the growth of the parasite. The enzyme is also implicated in the pathogenesis leading up to the hepatic fibrosis and its complications including cancer. The five isoforms of this particular enzyme from the parasite therefore qualify as potential drug targets. In this study, a detailed structural and ligand binding analysis of the isoforms has been done by modeling. The overall three dimensional structures of the isoforms are well conserved with three helices and a β-wing stabilized by four disulfide bonds. There are characteristic differences at the calcium binding loop, hydrophobic channel and the C-terminal domain that can potentially be exploited for drug binding. But the most significant feature pertains to the catalytic site where the isoforms exhibit three variations of either a histidine-aspartate-tyrosine or histidine-glutamate-tyrosine or histidine-aspartate-phenylalanine. Molecular docking studies show that isoform specific residues and their conformations in the substrate binding hydrophobic channel make unique interactions with certain inhibitor molecules resulting in a perfect tight fit. The proposed ligand molecules have a predicted affinity in micro-molar to nano-molar range. Interestingly, few of the ligand binding interaction patterns is in accordance to the phylogenetic studies to thereby establish the usefulness of evolutionary mechanisms in aiding ligand design. The molecular diversity of the parasitic PLA₂ described in this study provides a platform for personalized medicine in the therapeutics of clonorchiasis.

Electronic supplementary material

The online version of this article (doi:10.1007/s12291-013-0377-1) contains supplementary material, which is available to authorized users.  相似文献   

浅谈天然药物化学设计性实验教学方案的构建与实施     

廖彭莹 《大众科技》2014,(2):108-109,118

实验课对天然药物化学教学有着关键性影响,在其中引入设计性实验教学是对现有实验课程的一次探索性改革。设计性实验教学方案的构建和实施需要从课题选择、方案设计、实验准备、实验实施及结果分析等多个环节入手,在教学实践中这种教学方式取得了良好的效果。  相似文献   

高考物理实验与高中物理教学的关系分析     

张玉平 《科教文汇》2014,(18):164-165

物理是一门实验学科,在高中物理教学中,实验一直贯穿于物理教学的始终。随着近年来我国教育体系的不断改革,在新课标体系下,学校和老师越来越重视高中物理实验。物理实验不仅仅体现在平时的教学中,在高考物理中占据的分数比例也非常大。因此,学校应该加强高中物理实验教学,培养学生的实验意识,提高学生的实验能力水平,从而在高考中取得优异的成绩,为国家人才培养和高等学校录取人才提供强有力的保证。  相似文献   

提升高分子本科生创新能力的实验体系改革初探     

胡园园  吴力立  陈艳军  张超灿 《科教文汇》2014,(24):55-56

高分子材料科学与工程专业旨在培养高分子材料领域的高级工程技术人才,对学生的实践能力和创新能力都有很高的要求。本文针对武汉理工大学高分子专业大学生的特点及现有体系的问题,提出了几种高分子专业实验体系的改革措施,以期有效提升该专业本科生的创新能力,并辐射至整个工科院校。  相似文献   

谈高职院校数学说课--以定积分的应用为例     

姜咏梅 《科教文汇》2014,(36):41-42

说课是教师在备课的基础上,口头向同行和专家叙述具体课题的教学设计及其依据的一种教学研究活动。它能集中体现和反映教师的教育教学观念、教学能力和教学水平。文章以“定积分的应用”（2学时）为例,根据高职教育和学生特点,从大纲及教材、学情、教法、教学过程以及自我评价等几个方面进行阐述,以期与各位同行共勉。  相似文献   

从创新实验中体会教书育人     

王伟  李忠文  周细应 《科教文汇》2014,(9):33-34

科学态度不仅是一句口号,更需要在实际科研工作中不断强化。本科生参加创新实验得以与研究生导师近距离接触,在提早感受实验室氛围的同时,不仅可以培养他们的科研兴趣,锻炼他们的动手能力,丰富专业知识,提高沟通、交流的能力,更重要的是,在实验中他们学会克服自身的惰性,培养科研精神。这样,良好的工作态度以及专业的工作素养可以为他们步入社会参加工作带来有力保障。  相似文献   

NO2与NO气体制备演示一体化微型实验探究     

洪冬梅 《科教文汇》2014,(9):168-168,190

实验室制取NO2、NO的反应,由于其毒性,实验装置的改良备受关注,笔者进行了进一步的改进,旨在减少试剂用量、减轻尾气毒害,人人有机会动手实践,这一点符合绿色化学的发展理念。  相似文献