Secondary Students’ Stable and Unstable Optics Conceptions Using Contextualized Questions

This study focuses on elucidating and explaining reasons for the stability of and interrelationships between students’ conceptions about Light Propagation and Visibility of Objects using contextualized questions across 3 years of secondary schooling from Years 7 to 9. In a large-scale quantitative study involving 1,233 Korean students and 1,149 Singaporean students, data were analyzed from responses to the Light Propagation Diagnostic Instrument consisting of four pairs of items, each of which evaluated the same concept in two different problem situations. Findings show that only about 10–45 % of students could apply their conceptions of basic optics in contextualized problem situations giving rise to both stable and unstable alternative conceptions. Students’ understanding of Light Propagation concepts compared with Visibility of Objects concepts was more stable in different problem situations. The concepts of Light Propagation and Visibility of Objects were only moderately correlated. School grade was not a strong predictive variable, but students’ school achievement correlated strongly with their conceptual understanding in optics. The teaching and learning approach and education systems in the two countries may have had some influence on students’ conceptual understanding.     

Academic social bookmarking: An empirical analysis of Connotea users

Three groups of social bookmarking users, namely experienced users, users with moderate level of experience, and novice users, were investigated, in terms of their reported tagging behaviors, perceived usefulness of social bookmarking in information discovery and management, and perceived usefulness of the bookmarking features provided. Based on the empirical analysis of the Connotea users, who are primarily in academia, the study shows that experienced academic users generally prefer to use social bookmarking while moderately experienced and novice users still prefer to use the traditional bookmarking methods, such as creating and using bookmarks on a dedicated computer. Experienced academic users were also found to create more tags per bookmark comparing to the other two groups. Most novice academic users, however, only created one tag per bookmark, which just met Connotea's minimum requirement. Surprisingly different from the collaborative design nature of the social bookmarking systems, the study finds that our participants, particularly experienced academic users, prefer to create and use their own bookmarks rather than sharing bookmarks created by others. In fact, experienced users have significantly higher frequency (once every two weeks) of creating bookmarks than the other two groups (once a month or less). In addition, website design features and functions, such as automatic collection of bibliographic information, are regarded by all participants as helpful for information discovery. The in-depth examination and discussion of the opinions of Connotea users may be useful for further improvement of the design features and usage applications, particularly for academic social bookmarking websites. The results may also have potential implications to the future development of social bookmarking services in general.     

~(194—195)Pt,~(194—195)Hg的超对称性

本文就~(194-195)Pt,~(194—195)Hg核,在原子核的u(12/12)超对称性群下进行了能谱计算并与实验作了比较。结果表明,这些核可能是N=7超多重态成员的“候选者”     

立足学科发展着力自主创新完善学会建设促进科技进步——江西省实验动物学会工作简要回顾

江西省实验动物学会走过了光荣的二十一年历程,协助政府管理部门为推动实验动物科技工作的发展做了许多有益的工作,充分发挥了桥梁和纽带作用,取得了长足发展,迈出了新步伐,形成了许多新亮点,近七年连续评为省科协先进学会.     

David F. Treagust: congenial soul, science educator, and international research leader

For almost a half century David F. Treagust has been an exemplary science educator who has contributed through his dedication and commitments to students, curriculum development and collaboration with teachers, and cutting edge research in science education that has impacted the field globally, nationally and locally. A hallmark of his outstanding career is his collaborative style that inspires others to produce their best work.     

知识管理理论的发展渊源与构成

文章论述了知识管理理论发展的两个阶段,以信息为中心的第一阶段知识管理理论主要有经典战略管理理论、竞争战略理论、核心竞争理论和信息管理理论;以人力资源为中心的第二阶段知识管理理论主要有人力资本理论、生命周期理论、嵌套知识管理理论和复杂性理论.     

谈ILAS小型版的特征及应用

本文评述了ILAS小型版的主要特征,并介绍了ILAS小型版在实际应用中的一些方法和技巧。     

图书馆自动化集成系统的评价标准

本文从系统性能、系统的运行模式、数据库管理系统、数据的标准化等六个方面分析了图书馆自动化集成系统软件的评价标准。参考文献10。     

科技人员创新创业政策制定相关因素分析

国内外学者在鼓励科技人员创新创业方面都进行过深入研究,且近几年来呈现上涨的趋势。文章采用文献 调查法对通过研究相关文献了解到目前有关科技人员创新创业的研究和发展、影响因素、鼓励政策措施进行分析。在 了解有关科技人员创新创业现状的基础上,对影响其发展的原因进行归纳总结,并结合各地出台的相关政策措施分析 出制定鼓励科技人员创新创业政策的关键,旨在为各省市针对自身不足有效出台政策办法提供有价值的参考与启示。     

国外图书馆学情报学2001年研究进展(三)

本期介绍的是国外（英、美、日、俄）图书馆学情报学１５种专业期刊（英文１２种、日文２种、俄文１种）上（多数为２００１年５～６月间）发表的主要论文。探讨的主题涉及到藏书建设、电子与网络资源、数字（虚拟）参考服务、信息素质教育、信息检索、中文科学引文数据库、珍善本馆藏的数字化、因特网与图书馆的关系、版权法、信息技术的伦理问题、信息查询行为、知识管理、图书馆联合体、信息生态系统等等。１《大学与研究图书馆》（CollegeandResearchLibraries，双月刊）第３期共发表了６篇文章。其中“大学图书馆中的畅销书”考察了…