局部对称黎曼流形的极小子流形

以Nn+p表示其截面曲率KN 满足 0 <δ≤KN≤ 1的n +p维局部对称完备黎曼流形 ,Mn 是Nn+ p的n维极小子流形 ,本文研究这类子流形的截面曲率的Pinching问题     

警觉的蜻蜓

拍摄者自述：“我想清晰地表现蜻蜓头上的细节。因此拍摄时使用了专门的微距镜头。”     

发挥学会优势 做好委托工作

<正> 根据国务院第351号令发布的《医疗事故处理条例》规定,从2002年9月1日《条例》施行之日起,省、市(州)两级医学会承担医疗事故技术鉴定工作。这是一项十分重要而又复杂、艰巨、技术性、科学     

Alternative Conceptions in Biology-Related Topics of Integrated Science Teachers and Implications for Teacher Education

This paper reports a study of the alternative conceptions held by junior secondary science teachers enrolled in an in-service teacher training program. The subjects completed a written instrument which probed their understanding of biological concepts in the integrated science curriculum. The subjects, particularly the nonbiology graduates, were found to show serious misunderstanding in concepts concerning diversity of life, photosynthesis and respiration, reproduction, and detecting the environment. This finding supports the assertion that our science teachers, being graduates in specific areas, are inadequately prepared to teach a broad and balanced junior science curriculum. To strengthen the subject matter knowledge and pedagogical skills of prospective and practicing junior science teachers, a number of provisions are suggested for teacher training programs, undergraduate science courses, and school-based activities.     

现代家庭最优组合投资模型与模糊策略

本文深入分析了现代家庭组合投资的渠道,建立了最优组合投资模型,运用模糊策略对期望收益率和风险进行确定,对期望较高收益率和较小风险的家庭组合投资具有一定的实用价值。     

城乡统筹视角下欠发达地区县域村庄布局规划研究——以河南省社旗县为例

本文以河南省社旗县县域村庄布局规划为例,在分析欠发达地区县域的经济、社会、文化等基础上,通过对县域地形地貌、交通区位等因素与村庄的规模、村庄密度、村庄的经济和村庄空间分布的表征现象进行解析,提出村庄布局规划的空间发展策略、迁并标准、村庄布局调整方案以及拟解决的关键问题.     

Education under the shadow of politics: school buildings in Cyprus during the British colonial period

This paper examines how politics have shaped Turkish Cypriot educational institutions and school buildings in Cyprus, focusing on the British colonial period (1878–1960). Unlike other British colonies, Cyprus enjoyed considerable autonomy on educational matters in the early decades of British occupation. During this period education, which was segregated, played a pivotal role in cultivating national aspirations of the two major ethnic populations on the island. The two decades following the 1931 revolt against the colonial regime was a period in which the British took serious measures in matters relating not only to education but also to school architecture. Atatürk’s reforms in creating a new modern Turkish society, on the other hand, evoked Turkish Cypriot ethnic nationalism. Without having the tension of the ideals of nationalism and modernism Turkey had to pacify, Turkish Cypriots embraced the modern as necessarily national and built their schools during and after the 1950s in a modern style.     

Urbanizing folklore,Folkloricizing the urban: cultural communication between the urban poor and popular music in Dhaka

This article explores how a particular kind of popular music of Dhaka city called ‘urban folk’ and the cultural identity of the rural migrants have been producing each other in an ongoing process of cultural communication. Following a discussion on the historical background of urban migration and its depiction in the prevailing pop music culture, this article uses the concepts of ‘cultural hybridity’ by Homi K. Bhabha and ‘political society’ by Partha Chatterjee to argue how the fluid structure of this hybrid form of music and its unconventional mobility between the folk and the pop have been in close association with the urban poor's formation of political society in contemporary Dhaka.     

Antibacterial and anti-biofilm activity of the lipid extract from <Emphasis Type="Italic">Mantidis ootheca</Emphasis> on <Emphasis Type="Italic">Pseudomonas aeruginosa</Emphasis>

The aim of this study is to assess the antibacterial and anti-biofilm properties of the lipid extract from Mantidis ootheca against the gentamycin resistant Pseudomonas aeruginosa. The chemical composition of the lipid extract and its relative proportion were determined using the technique of gas chromatography coupled with mass spectrometry (GC-MS). Antibacterial susceptibility tests were performed using a disc diffusion assay and the minimum inhibition concentration (MIC) was determined by way of the agar dilution method. The anti-biofilm test was carried out with crystal violet staining and scanning electron microscopy (SEM). There were 16 compounds detected, and the most abundant components were sesquiterpenoids, monoterpenes, and trace aromatic compounds. The MIC for P. aeruginosa was 4 mg/ml and the eradication effect on preformed biofilms was established and compared with a ciprofloxacin control. The results of our study indicated that a lipid extract from M. ootheca could be used as a topical and antibacterial agent with anti-biofilm activity in the future.