带参数的奇异三阶三点边值问题的正解

本文讨论下述带参数的奇异三阶三点边值问题■其中γ>0是参数且a(t)在t=0和t=1处具有奇性,当f和a满足适当条件时,对一定取值范围内的γ,获得了上述边值问题正解的存在性与不存在性.所用主要工具是Guo-Krasnoselskii不动点定理.     

一类微分方程组正周期解的存在性

根据锥上不动点指数理论,研究了微分方程组正周期解的存在性。应用线性问题的第一特征值和拓扑度理论建立了其正解的存在性定理。     

大学女生贫血现象与有氧运动的康复研究

女大学生入学时贫血发生率较高,严重地影响其身体健康及机体对运动的承受能力。笔者通过抽样调查与研究表明,贫血女生中大部分属功能性贫血,通过以有氧运动为主的体育锻炼,且运动方式得当,即可改善其身体机能。     

The Centre for Studies in Science Education at the University of Leeds

The purpose of this study was to explore the effects of aesthetic science activities on improving elementary school at-risk families’ children's positive thinking, attitudes toward science, and decreasing their anxiety about learning science. Thirty-six 4th-grade children from at-risk families volunteered to participate in a 12-week intervention and formed the experimental group; another 97 typical 4th graders were randomly selected to participant in the assessment and were used as the comparison group. The treatment for experimental group children emphasized scaffolding aesthetic science activities and inquiry strategies. The Elementary School Student Questionnaire was administered to assess all children's positive thinking, attitudes toward science, and anxiety about learning science. In addition, nine target children from the experimental group with the lowest scores on either positive thinking, or attitudes toward science, or with the highest scores on anxiety about learning science in the pre-test were recruited to be interviewed at the end of the intervention and observed weekly. Confirmatory factor analyses, analyses of covariance, and content theme analysis assessed the similarities and differences between groups. It was found that the at-risk families’ children were motivated by the treatment and made significant progress on positive thinking and attitudes toward science, and also decreased their anxiety about learning science. The findings from interviews and classroom observations also revealed that the intervention made differences in children's affective perceptions of learning science. Implication and research recommendation are discussed.     

Meaning of life as a protective factor of positive affect in acculturation: A resilience framework and a cross-cultural comparison

Although research has demonstrated a strong linkage between meaning of life and positive emotion, few studies have examined this association in the context of acculturation. The purpose of this study was to investigate the predictive effects of meaning of life and acculturative stressor on positive affect in a sample of Chinese international students in Australia and Hong Kong, and to compare these effects between the two groups. Four hundred mainland Chinese postgraduate students at six universities in Hong Kong and 227 Chinese international students at the University of Melbourne in Australia completed a questionnaire that included measures of acculturative stressor, meaning of life, positive affect, and demographic information. The analyses revealed that (1) meaning of life had a strong positive contribution to predict positive affect in acculturation, and acculturative stress had a negative impact on positive affect within both samples; (2) social interaction had a significant negative predictive effect on positive affect in both samples, and academic work served as a significant negative predictor of positive affect in the Hong Kong sample; and (3) meaning of life was found to mediate the relationship between acculturative stress and positive affect in both samples. The theoretical and practical implications of the study are discussed.     

一类椭圆型方程组解的存在性

本文研究了一类依赖于正参数λ椭圆型方程组,利用变分方法得到方程组存在最小能量解且为正解。     

科技期刊注重科技伦理评估的做法及实例分析

【目的】促进科技期刊的正确导向,提升科技期刊对科技伦理的重视程度,加强普通科技期刊进行科技伦理评估的力度。【方法】 阐述了科技期刊重视科技伦理评估的道德意义,提出了科技伦理评估的具体做法。【结果】 发现通过消除伪科技伦理谣言、关注国际科技伦理的热点、刊发前瞻性科技伦理专业论文、结合新闻热点约稿、解疑释惑等方法是科技期刊实现科技论文评估的具体途径。【结果】 科技期刊论文的科技伦理评估还在起步阶段,需要进一步完善伦理委员会的审查、监督体系,提高作者和编辑的科技伦理学意识等等。     

“懒惰”对人类科技进步的影响

人类的"懒惰"表现为更舒适、便捷、低劳动强度的生活追求,从社会意识和个人意识两个层面推动科技进步。然而,这种影响是相对的、辩证的,懒惰是科技进步的动力之一,但科技进步反过来对人自身的影响也是双面的,可能会加剧人性中已有的懒惰因素(消极的懒惰)。应激发"懒惰"的积极因素,抑制"懒惰"的消极因素(追求不劳而获)。     

旅游专业实习生情绪智力特征研究

文章使用情绪智力量表(EIS),对旅游专业实习生的情绪智力问题进行了问卷调查。结果表明:旅游专业实习生在男女性别方面,在他人情绪管理上的存在性别上的显著差异;在学历和家庭所在地方面,旅游专业实习生差异不显著;旅游专业实习生在是否独生子女方面上存在情绪知觉上的显著差异;情绪感知和他人情绪管理在实习部门上存在显著差异。提高旅游专业实习生的情绪智力,需要学校、企业和学生自身这三方的共同努力。     

Exploring the moderating role of well-being on the adaptive link between self-assessment practices and learning achievement

Self-assessment practices can positively impact student learning and achievement. However, less is known about psychological moderators that can influence the impact that self-assessment practice may have on achievement. Integrating the dual processing self-regulation model and the self-assessment cycle framework, this study examined the role of students’ positive well-being in the link between self-assessment practices and domain-specific achievement scores. Hierarchical multiple regression analyses using data from 765 secondary school students revealed that self-assessment practices positively predicted achievement scores. Results also showed that positive well-being moderated the relationship between seeking internal feedback and self-reflection and achievement scores, in that the positive link between such self-assessment practices and achievement was stronger for students who had low or moderate well-being. These findings reinforce the impact of self-assessment on learning and add to the ecological validity of the dual processing self-regulation model. The discussion focuses on how these findings contribute to our understanding of how well-being could influence the adaptive role of internal and cognitive self-assessment practices in student learning. Limitations and future research directions are also discussed.