生态安全的内涵及其研究意义

生态安全主要包括两个含义:一是生态系统自身是否安全;二是生态系统对于人类是否安全。生态安全的本质可以认为是围绕人类社会的可持续发展目的,促进经济、社会和生态三者之间和谐统一。影响安全的因素主要有生态环境问题、公共政策和公众素质。加强生态安全研究有诸多价值和意义:能够促进生态系统的可持续发展;对可持续发展概念起到补充和完善作用;有利于树立人们的生态安全意识;生态安全关系到国家安全及国民的生命与健康。     

白洋淀湿地生态功能评价及保护对策

白洋淀湿地是华北最大的淡水湖泊湿地 ,被誉为华北平原生态环境的寒暑表。在缓洪滞沥、蓄水兴利、调节气候、净化水质等方面发挥着重要作用。根据研究区的自然环境 ,生态功能特点 ,以及社会需要 ,探索白洋淀湿地生态保护对策     

涿鹿两战的性质及历史影响

黄帝战蚩尤,是平定叛乱的军事斗争;黄帝战炎帝,是反对分裂的军事斗争.黄帝总结了两战发生的经验教训,加速了肇造大一统国家制度的历史进程,建立了中央集权的国家制度,并开始实行了选贤任能的“禅让制度“.     

Environmental identity formation in nonformal environmental education programs

This paper explores experiences that remained salient in the memories of former participants in three nature-based programs in Colorado, five to forty years after childhood involvement. Interviews with program founders and staff, archival research, and observations of current activities provided an understanding of each program’s history, mission and educational approach. In this context, 18 former participants were interviewed about program experiences that they remembered and program impacts on their environmental identities and academic or career choices. Results were analyzed through the lens of social practice theory, which has significant implications for the design and evaluation of environmental education programs. Results showed that social practice theory is a useful framework for interpreting the development of a social environmental identity, but an ecological identity that forms through direct contact with the natural world is an important complementary concept.     

An ecological approach to the on-line assessment of problem-solving paths: Principles and applications

In this paper, we propose a theoretical framework for designing on-line situated assessment tools for multimedia instructional systems. Based on an ecological psychology approach to situated learning, a graph theoretic methodology is applied to monitor students' performance (solution paths) throughout the learning activity. Deviation of the student's path from the target (expert) path generates indicators which can function as alerts to the student and to the instructor. The information collected in the dribble files and presented visually enables the instructor to identify problems quickly and intervene appropriately. The feasibility of the methodology is explored in case studies describing three instructional systems that teach (1) critical thinking and problem-solving skills, (2) principles of hemodynamic monitoring and treatment, and (3) orthodontic treatment, respectively.     

《老子》生态智慧与生态教育

当前,人类社会的生态环境遭到严重破坏,人与自然的矛盾日益尖锐化。该文通过对老子丰富的生态智慧及其核心概念“道”和“无为”的重新解读,为生态教育实践提供了生动的理论依据。     

甘肃省生态足迹动态测度与分析

生态足迹分析法现已广泛应用于各种可持续发展的测度,文章应用该方法对甘肃省的可持续发展状况进行了评价和分析.在1996-2003年间,每隔一年计算出甘肃省的生态足迹,以此来对甘肃省可持续发展状况的动态变化进行测度和分析.计算结果表明,人均需求足迹整体为上升趋势,人均供给足迹整体为下降趋势;生态冗余只有1996年为正,即处于可持续发展状态;其余4个年份均为负值,即为不可持续发展状态.在历年人均生态足迹需求的各组成土地类型中,化石燃料用地和耕地是主要的两个组成类型,其次是草地;在人均生态足迹供给的组成中,耕地和草地是最主要的两个组成类型.     

河北省咸水资源的利用与开发

河北平原是严重缺水地区，由于长期超采地下水，致使河北平原产生一系列的环境地质问题，河北平原同时也藏有大量地下咸水，合理开发利用地下成水资源，是解决河北平原水资源短缺的关键问题，从河北平原咸水分布、储量及咸水在工农业生产方面的作用分析了合理开发与利用地下咸水的优势与意义。     

论重庆市政府在经济发展中的生态责任

目前,重庆市的经济发展取得了一系列的成绩,但是在发展过程中,生态环境与经济发展的矛盾日益凸显,围绕重庆市生态环境与经济发展的问题,就重庆市政府在经济发展中的生态责任进行了论述。     

网络时代图书馆对读者的道德文化教育

步入网络时代的高校图书馆，要重视研究网络化，探索对读进行道德教育的新特点；要善于依托网络环境，重塑大学生们新的精神生活；要不断开发网络明，完成对读道德化教育现代化的现实转换，努力促进图书馆教育职能的发挥，开创图书馆工作的新局面。