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AbstractChildren’s connection to nature (CTN) is declining with each generation, a concerning trend given that CTN is positively linked to wellbeing and environmentalism. A primary cause of this decline is that twenty-first-century youth engage with screens for several hours each day, which to a large extent replaces nature-based play. Researchers have proposed that this change represents a transition in human orientation, particularly in Westernized societies, from nature (biophilia) to digital media (videophilia). Interventions promoting nature-based play must acknowledge digital-media use as a competing leisure pursuit, but the literature presents little guidance for designing programs that will attract young people who are more oriented toward digital media than nature. Drawing on a wide breadth of research, we address this gap through (1) exploring the implications of videophilia for nature-based programming and (2) summarizing recommendations from a narrative literature review for designing interventions that appeal to digital-media-oriented youth. 相似文献
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简述了X射线衍射(X-Ray Diffraction,XRD)的基本原理,计算了硅晶体的消光特性,从理论上研究了Si基薄膜XRD表征的特征.研究结果表明:由于薄膜的择优生长,Si基薄膜XRD谱与粉晶XRD谱存在差异;并可能观测到Si基片的二级衍射峰.研究结果在实际应用中对分析硅基薄膜的晶体结构具有重要意义. 相似文献
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熊英 《株洲师范高等专科学校学报》2006,11(1):110-113
语言态度对语言使用者的语言能力和语言行为产生深刘的影响。通过对湖南省龙山县坡脚乡万龙村土家族人的实地语言情况的调查,可以从主观评价、民族意识、价值取向与行为倾向、语言忠诚等方面分析土家人的语言态度,从而透视和反观土家语濒危现象。 相似文献
4.
讨论了捕获量是关于种群数量的线性函数时一类广义Logistic 种群的生存状况,得到了种群弱持续生存和灭绝的充分条件. 相似文献
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K/T界线的研究进展——兼论元素演化与恐龙灭绝的可能关系 总被引：1，自引：0，他引：1
本文通过总结近一、二十年来K/T界线的研究进展和恐龙绝灭的相关假说，认为前人在K/T界线和恐龙灭绝的研究方面确实取得了很大的成果，但同时,大多数的研究都是集中在对灾变大环境的求证上。只有少数学者注意到Co、Cr、Ni、Mn、V等这些在界线处变化较大的元素同时也是生物必需微量元素，而另外一些异常元素（如REE、Pb、Sr等）也可能对生物的正常生理机能产生重要影响，这些元素的异常变化很可能与恐龙灭绝存在着一定的关系，但这方面的系统研究还相当缺乏，今后应加强元素的生物机能和与生命活动密切相关的元素在K/T界线附近的演化与恐龙灭绝的关系等方面的研究。 相似文献
6.
吴金宝 《南阳师范学院学报》2006,5(7):100-101
河南濒灭剧种的唱词通俗美主要表现为鲜明的地方性、浓郁的生活性、率真的乡土性、唱词的即兴创作性等四个方面。 相似文献
7.
In the context of globalization, indigenous educational systems of endangered cultures are faced with extinction. Biologists recognize that biodiversity is dependent upon sustaining and promoting knowledge and values of indigenous cultures. Education researchers have a similar responsibility — to promulgate educational diversity before several thousand years of valuable educational knowledge is extirpated. This paper presents the Keiyo of Kenya who have a rich educational system. Its focus is on an indigenous game, Kechui (using calculations to sharpen your mind), based on cattle raiding, and the Keiyos' use of the game for learning mixed strategy-based probabilistic problem solving. Kechui may also have international potential for teaching probabilistic problem solving in contemporary mathematics and science, especially genetics. 相似文献
8.
Working from the 1970s to the early 1990s, Walter Alvarez and his research teamsought the cause of the mass extinction that claimed the dinosaurs 65 million years ago. The present paper discusses thatresearch in terms of eight puzzling observations, eight episodes of hypothetico-predictive reasoning, enumerative induction,and Jung's interrogative theory of scientific discovery. The Alvarez case history paints scientific discovery as a process in whichcausal questions are raised and answered through the creative use of analogical reasoning followed by an equally creative process ofhypothesis testing in which predicted and observed results are compared. According to this account, puzzling observations, causalhypotheses, and imagined tests drive investigations and the search for evidence. Two implications follow. The firstconcerns the education of new scientists and science education researchers and the need to more clearlydifferentiate hypotheses from predictions in the research process. The second concerns standard science classroom instruction that shouldmore frequently engage students in open inquiries that raise causal questions and encourage the generation of alternative causalhypotheses, which can then be explicitly tested in ahypothetico-predictive fashion. 相似文献
9.
南宋灭亡的根本原因是由于封建统治集团的腐败,而其间,权奸贾似道的倒行逆施,加速了宋朝的覆灭。我们把造成贾似道这类典型官僚的社会契机及其演化过程,称之为"贾似道现象",其主要表现为:少年时缺乏良好的家庭教育,任人唯亲的裙带风使他当上了大官,谎报功绩使他骗取了至高无上的权力,而权力失控又使他得以胡作非为,贪图淫乐的人生观使他向敌乞降,多行不义使他终于被人民抛弃。历史给了我们一个深刻的教训:能否正确用人和对权力有效监督,是决定一个国家兴亡的重要因素之一,而这又取决于这个政权的性质与体制;如果坏人当政,必将祸国殃民。 相似文献
10.
赵世峰 《通化师范学院学报》2004,25(2):47-48
利用几何结构因子的定义，研究复式晶格的几何结构因子的更为简单的求法并总结其衍射时的消光规律。 相似文献