世界华人邮票掇英

在我的《中外交流》专题邮集中,有一册是汇集国外发行有关华人题材的邮票。这里撷取几个画面,奉献给读者。三国邮苑缅怀华人开拓1997年是中国移民到达古巴150周年,古巴发行一种邮票,画面是古巴华     

小学生自主学习课堂的特征与构建策略

小学生正处于认知和个性快速发展的阶段,可塑性较强,对小学生进行自主学习能力培养有助于为其进一步学习奠定基础。本文结合小学生的身心发展特点总结了小学生自主学习内涵以及小学生自主学习课堂的特征,探讨了构建小学生自主学习课堂的思路,并就小学生自主学习课堂构建面临的挑战进行了深入的分析。     

科技人才引进和培养路径探究

人才是第一生产力,科技人才是引领和带动经济社会发展的重要支柱。随着国内外科技的不断发展,我国科技体制改革面临着一个重大课题。本文主要从科技人才对社会经济发展的重大意义、当前科技人才在引进和培养方面存在的问题进行分析,并就科技人才引进机制、评价机制、培养机制、竞争机制等作了一些研究,以期充分发挥科技人才在经济社会发展中的积极作用。     

论科技情报工作对创新型国家建设的重要性及服务模式

科技情报的功能是为战略决策和战术选择提供支撑服务。科技情报工作是科研和生产的重要一环,是科学技术的重要组成部分。在创新型国家的建设过程中,科技情报工作更是国家创新体系的有机组成部分。在我国建设创新型国家的决定性阶段,通过个性化的服务模式,科技情报工作能够提高科学技术转化为生产的效率,从而促进创新型国家的建设。     

高校科技成果转化团队知识共享的演化博弈分析

针对高校科技成果转化团队成员知识共享的自身特征和影响因素,做出假设、设置变量,构建高校科技成果 转化团队成员知识共享的演化博弈模型,并对其进行均衡点分析,得出各影响因素对知识共享的作用关系,最后提出 促进高校科技成果转化团队知识共享的对策建议。     

RRM1 gene expression in peripheral blood is predictive of shorter survival in Chinese patients with advanced non-small-cell lung cancer treated by gemcitabine and platinum

Objective  

To evaluate the predictive values of gene expressions of ribonucleotide reductase M1 (RRM1) and breast cancer susceptibility gene 1 (BRCA1) in peripheral blood from Chinese patients with non-small-cell lung cancer (NSCLC) treated with gemcitabine plus platinum.     

Evaluation of the antioxidant effects of four main theaflavin derivatives through chemiluminescence and DNA damage analyses

Theaflavins (TFs) are the dimers of a couple of epimerized catechins, which are specially formed during black tea fermentation. To explore the differences among four main TF derivatives (theaflavin (TF₁), theaflavin-3-gallate (TF₂A), theaflavin-3′-gallate (TF₂B), and theaflavin-3,3′-digallate (TF₃)) in scavenging reactive oxygen species (ROS) in vitro, their properties of inhibiting superoxide, singlet oxygen, hydrogen peroxide, and the hydroxyl radical, and their effects on hydroxyl radical-induced DNA oxidative damage were systematically analyzed in the present study. The results show that, compared with (−)-epigallocatechin gallate (EGCG), TF derivatives were good antioxidants for scavenging ROS and preventing the hydroxyl radical-induced DNA damage in vitro. TF₃ was the most positive in scavenging hydrogen peroxide and hydroxyl radical, and TF₁ suppressed superoxide. Positive antioxidant capacities of TF₂B on singlet oxygen, hydrogen peroxide, hydroxyl radical, and the hydroxyl radical-induced DNA damage in vitro were found. The differences between the antioxidant capacities of four main TF derivatives in relation to their chemical structures were also discussed. We suggest that these activity differences among TF derivatives would be beneficial to scavenge different ROS with therapeutic potential.     

越南华文新文学概况及研究述评

越南华文新文学(简称越华文学)形成于抗日战争时期,起初为中国抗战文学的海外版,后来逐步走向本土化。越战时期,以现代诗为代表的越华文学已经形成了自己的特色,在东南亚各国中出类拔萃,至今仍是越华文学难以再现的高峰。长期以来,基于复杂的历史因素,越华文学的资料难觅,研究十分寂寞。如今,在新的历史时期,越华文学正逐步受到研究者的关注,有关资料也渐渐浮出水面。本文一方面梳理了越华文学的发展历程,另一方面对越华文学的研究现状进行反思。     

河南新型城镇化建设再思考

在第三次世界城镇化的浪潮中,为创造性地促进内需、解决城乡统筹,城镇化成为破解矛盾的关键抓手.河南是农业大省和人口大省,城镇化的压力较大,因此在新型城镇化建设中难题较多,最主要的是人口转移挑战大,土地和资金等资源支撑不足,气候环境破坏严重.考虑到河南省区域广而发展不平衡的严峻现实,在新型城镇化建设中务必要以协调为主线,以城镇体系的合理布局为原则,以“化农”为根本任务,以城镇低碳经济为方向,合理解决传统城镇化弊病.     

Gaming personality and game dynamics in online discussion instructions

Gamification is the use of game mechanics to drive game-like engagements and actions. It applies game mechanics, dynamics and frameworks to promote desired learning behaviours. Positive and effective gamification could enhance learning and engage learners in more social and context-rich decision-making for problem-solving in learning tasks. Effective gamification design should understand the game personalities of learners, social engagement styles, and intrinsic- and extrinsic-motivated user styles initially and evaluate and select appropriate game mechanics, game dynamics, to create ideal gamification instructions. The research question this study investigated is: How will four types of gaming personalities (i.e. Explorer, Socialiser, Killer and Achiever) predict the level of game dynamics in online discussion environments? This study concluded that examining how gaming personalities relate to game dynamics in a gamified online discussion instruction is not sufficient to design effective gamification. It suggests future studies in game instructions should focus on the relationships between game dynamics, gamification contexts, gaming personalities or preferences, dynamic gaming engagement styles, etc.