宁波市中小学生超重和肥胖的现状调查与分析

为了解宁波市中小学生肥胖的发生率情况, 以2010年浙江省学生体质调研数据为基础, 对宁波市3085名中小学生进行超重和肥胖的研究. 结果显示: 城市男生的超重检出率非常显著地高于农村男生, 而真正肥胖的检出率却呈现出农村高于城市的现象; 女生超重检出率没有发现城乡差异, 肥胖检出率农村依旧高于城市; 宁波市中小学生中男生超重检出率显著高于女生(P<0.01), 而肥胖检出率没有明显的性别差异; 在分年龄段比较中, 还发现这种超重和肥胖的性别差异以9~11岁和14~17岁两个年龄范围为典型. 结论是农村学生的肥胖检出率超过了城市学生, 女生超重检出率基本持平, 说明超重和肥胖的现象已经开始步入乡村. 超重和肥胖的高发年龄段与全国调研数据接近, 但男女生超重和肥胖检出率的明显差异集中体现在9~11岁和14~17岁年龄段, 由此可见, 青春前期和青春期是超重和肥胖的高危时期.     

The Influence of Science Summer Camp on African‐American High School Students' Career Choices

This study explored if a weeklong science camp changed Louisiana African‐American high school students' perception of science. A semi‐structured survey was used before and after the camp to determine the changes in science attitudes and career choices. Among the perceived benefits were parental involvement, increased science academic ability, and deepened scientific knowledge. These perceived benefits influenced the identities that students constructed for themselves in relation to science in their lives. Students who reported doing well in school science courses believed that science was more relevant to their lives. Female students who cited doing well in science reported less parental involvement in their schoolwork than males. This study draws attention to gender differences in science and to designing informal science learning experiences for African‐American high school students that can change attitudes toward career choices in science‐related fields.     

High school students’ understandings of geometric transformations in the context of a technological environment

This study investigated the nature of students’ understandings of geometric transformations, which included translations, reflections, rotations, and dilations, in the context of the technological tool, The Geometer’s Sketchpad. The researcher implemented a seven-week instructional unit on geometric transformations within an Honors Geometry class. Students’ conceptions of transformations as functions were analyzed using the APOS theory and were informed by an analysis of students’ interpretations and uses of representations of geometrical objects using the constructs of drawing and figure. The analysis suggests students’ understandings of key concepts including domain, variables and parameters, and relationships and properties of transformations were critical for supporting the development of deeper understandings of transformations as functions.     

基于三角白化权函数的高校家庭经济困难学生动态认定研究

从对现行认定方法的对比分析出发,提出了建立以身份判定、定量评级、定性评估为一体的资格认定体系;考虑到学生家庭经济信息灰性,构建了基于三角白化权函数的灰色聚类模型;并着眼资格认定的动态性和资助育人目标,构建了三级综合动态定性评估体系,以期能为我国高校家庭经济困难学生资格认定研究和工作实践提供参考.     

利用累积logistic混合模型研究考研因素对数学专业免费师范生学习动力的影响

基于六所部属师范大学数学专业免费师范生现状的调查数据,探讨是否允许考研和学习动力之间的关系.经典累积logistic模型对数据的拟合不佳.利用累积logistic混合模型,很好的拟合了数据,得到如果允许考研将提升免费师范生学习积极性的结论.     

A note on singular integral equations

The class of functions for which certain singular integral equations hold good is discussed and the method of obtaining appropriate solutions of such equations is explained through equations of simple form. A discussion of this type is felt to be essential for beginners.     

A note on Pythagorean triple preserving matrices

Several authors have found many Pythagorean triple preserving matrices in recent years. The purpose of this note is to show that all these matrices, and in particular the results published in Deshpande's 2001 paper are special cases of the earlier results obtained by Palmer, Ahuja and Tikoo.     

残疾大学生就业能力结构及对就业结果的影响

为探究残疾大学生就业能力的结构及其对就业结果的影响,在对467名残疾大学生进行问卷调查的基础上,采用探索性因子分析得到残疾大学生就业能力的4因子结构模型,运用验证性因子分析对该模型进行了验证;并利用多元回归分析考察了残疾大学生就业能力4因子对就业结果的影响.结果表明:1)残疾大学生的就业能力包含四个因子,分别为职业认同、自我效能感、人际交往、人力资本;2)职业认同、自我效能感和人力资本对残疾大学生就业结果中的工作满意度有正向影响,职业认同、自我效能感、人际交往和人力资本对残疾大学生就业结果中的月收入有正向影响.     

Generating scenarios of addition and subtraction: A study of Japanese university students

Students are presented with problems involving three scenario types of addition and subtraction in elementary mathematics: one dynamic (Change) and two static (Combine, Compare). Previous studies have indicated that the dynamic type is easier for school children, whereas the static types are more difficult and comprehended only gradually throughout elementary grades. However, these differences in scenario difficulty have not be adequately investigated in adults to ascertain whether they persist in adults who have used the operations for a long period of time. This study examined this with Japanese university students (ages 18–23 years). In Study 1, 99 participants were provided with one numerical equation and one picture representing one of the three scenario types, and were instructed to generate a single scenario. In Study 2, 97 participants were provided with one numerical equation and were instructed to recall the various scenario types that they had encountered previously and to generate multiple scenarios of diverse types. Results indicated that participants found the dynamic scenario types easier than static ones, and they tended to understand the given information of static types by interpreting them in dynamic forms (Study 1). In addition, they strongly preferred generating scenarios of dynamic type over static types (Study 2). Implications for mathematics learning are discussed.     

大学生物理实验素养调查分析

对某大学物理学系低年级本科生开展了抽样调查,发现样本群体的物理实验素养整体处于中上等水平,并从知识、能力、思维等方面具体分析了大学生的物理实验素养现状,讨论了大学生在实验学习中存在的问题,提出了教学建议,为高校进行实验教学改革提供依据.