生态视角下网络教学资源的开发     

蔡会霞 《江苏广播电视大学学报》2011,(6):29-32

面对网络教学资源相对陈旧、种类单调,资源的重复建设现象严重的情况,可以将网络教学资源、网络环境、开发人员、学习者作为一个生态系统,从生态学的视角出发,运用生态理论来研究网络教学资源建设过程中的问题,指导开发优质网络教学资源,创建远程学习的生态学习环境。  相似文献   

幂等矩阵与秩幂等矩阵的充要条件     

刘小川  何美 《雁北师范学院学报》2011,27(1)

满足A2=A的n阶方阵A称为幂等矩阵,它是矩阵环Mn（F）的一个幂等元;满足r（A）=r（A2）的n阶方阵A称为秩幂等矩阵。它们与空间的分解、不变子空间的研究有密切关系。利用线性空间的理论方法研究幂等矩阵与秩幂等矩阵的性质,分别得到与它们等价的一些充要条件。  相似文献   

文化多元化视域下马克思主义大众化及其实践路径     

崔越 《许昌学院学报》2011,30(3):109-111

文化多元化是当前我国马克思主义意识形态文化建设的基本文化生态。文化多元化在对人类文明进步产生巨大推动作用的同时,也对马克思主义主导意识形态文化建设带来了消极影响和认同危机。面对文化多元化负效应的影响,加快推进马克思主义大众化,就要坚持社会主义核心价值体系的引领,坚持主流文化的主导,正确对待传统文化的继承与弘扬,善于学习和借鉴人类文明的共同成果,同时坚持党领导下的理论创新等。  相似文献   

关于中等职业学校数学课堂教学策略的探索与实践     

郑玲 《科教文汇》2020,(10):120-122

在中职学校数学课堂教学中,合理有效的数学教学策略,包括根据不同专业需求灵活处理现有教材中的教学内容,合理有效的教学设计,适合学生的教学方法、途径与教学评价等。教学策略对优化课堂教学过程、培养学生的学习兴趣、提高课堂教学效率起着重要作用。  相似文献   

Genomic consequences of population decline in critically endangered pangolins and their demographic histories     

Jing-Yang Hu  Zi-Qian Hao  Laurent Frantz  Shi-Fang Wu  Wu Chen  Yun-Fang Jiang  Hong Wu  Wei-Min Kuang  Haipeng Li  Ya-Ping Zhang  Li Yu 《国家科学评论(英文版)》2020,7(4):798

Pangolins are among the most critically endangered animals due to heavy poaching and worldwide trafficking. However, their demographic histories and the genomic consequences of their recent population declines remain unknown. We generated high-quality de novo reference genomes for critically endangered Malayan (Manis javanica, MJ) and Chinese (M. pentadactyla, MP) pangolins and re-sequencing population genomic data from 74 MJs and 23 MPs. We recovered the population identities of illegally traded pangolins and previously unrecognized genetic populations that should be protected as evolutionarily distinct conservation units. Demographic reconstruction suggested environmental changes have resulted in a population size fluctuation of pangolins. Additionally, recent population size declines due to human activities have resulted in an increase in inbreeding and genetic load. Deleterious mutations were enriched in genes related to cancer/diseases and cholesterol homeostasis, which may have increased their susceptibility to diseases and decreased their survival potential to adapt to environmental changes and high-cholesterol diets. This comprehensive study provides not only high-quality pangolin reference genomes, but also valuable information concerning the driving factors of long-term population size fluctuations and the genomic impact of recent population size declines due to human activities, which is essential for pangolin conservation management and global action planning.  相似文献   

Speed bumps,roadblocks and tollbooths: how culturally and linguistically diverse parents navigate the highways and byways of giftedness in Ontario     

Cam Cobb 《British Journal of Special Education》2012,39(1):12-20

In reviewing literature on culturally and linguistically diverse (CLD) parental inclusion and disproportionality, Cam Cobb, assistant professor at the University of Windsor, Ontario, illustrates how CLD giftedness – and especially CLD giftedness in Canadian settings – represents an area in need of further research. In part, this article begins to address that need. Drawing from a larger critical qualitative inquiry, he details the stories of two CLD Canadian mothers as they sought to become involved in gifted identification and decision‐making processes. Knowledge and language arose in the data as two core themes of robust parental inclusion. These core themes, along with associated recommendations for policy, practice and research, are outlined in a discussion of the findings. While this article focuses on the gifted domain of special education in Ontario, the findings have wider implications for robust CLD parental inclusion in special education in general.  相似文献   

A Minority within a Minority? Social Justice for Traveller and Roma Children in ECEC     

Colette Murray 《European Journal of Education》2012,47(4):569-583

This article discusses recent policy developments in Europe regarding Roma and Traveller integration and Early Childhood Provision. After a long history of oppression, Roma issues have recently become prominent on the EU policy agenda. The article discusses how these relate to developments in other areas of policy: the European children's rights agenda and the recognition that early childhood education and care is a key policy tool to combat social exclusion. It gives background information on Roma and Travellers in Europe and discusses the consequences of subsuming the various communities under one umbrella term: Roma. The EU Commission is concerned with responses from Member States to the European Framework for National Roma Integration Strategies. The article argues that in order to address Roma children's experience from a holistic perspective, social justice and equality need to be key elements of early childhood education and care provision and training. The European policy developments that frame the article are examined from a local vantage point: the experiences of Traveller and Roma children in Ireland and the Irish Preschool Education Initiative for Children from Minority Communities.  相似文献   

塑造品牌栏目提高电视媒体竞争力     

张如成 《新闻界》2007,(6):132-133

随着电视产业化和频道专业化的深入,中国的电视媒体显现出空前无比的繁荣景象:频道越来越多,节目五彩斑斓,让人目不暇接.在这种表面“繁荣“的背后却隐含着现实的运营危机.对于电视媒体的发展而言,本文认为塑造收视率高、影响力大、竞争力强的品牌栏目就成为电视媒体的现实需要和当务之急.  相似文献   

试论新闻价值构成的多项性和层次性     

杨保军 《国际新闻界》2002,(4)

新闻价值构成要素属性的多样性、结构的多层性 ,决定了新闻价值是多层次的价值 ,是由多项价值组成的统一价值系统。本文对此进行了较全面的探讨 ,为人们深入理解新闻价值的构成提供了有意义的思路。  相似文献   

对体育科技期刊栏目设置的探讨   总被引：3，自引：1，他引：2  

《北京体育大学学报》编辑部 《北京体育大学学报》2002,25(6):757-759

体育科技期刊栏目的设置是办好科技期刊的一项重要工作.查阅了我国13个体育科技期刊栏目的设置,并以<北京体育大学学报>的栏目设置作为研究对象,进行了学术性探讨,认为原设置的"体育社会科学"、"体育心理学"、和"运动人体科学"都是合适的,仍应保留;可否将"统计与体质"改为"体质调研与运动员选材"栏目,"体育教学"改为"学校体育与体育教学"栏目,"运动训练"改为"竞技体育(或奥林匹克)与运动训练"栏目;建议增设"专题论坛"和"群众体育(或社会体育)与体育锻炼"栏目;另外,有的新的学术研究领域论文或上述栏目中的热点课题,也可以集中放在科技期刊临时设置的栏目中.  相似文献