学做服务工：中国都市青年、职业学校和新阶层的形成

中国职业学校学生的命运究竟如何？本文根据南京市两所职业学校为期一年（2007-2008年）的民族志研究,借由韦伯的分析路径,描述了职业学校学生学习生活以及最终由半技术工人进入新型服务经济领域的过程。研究表明,在今天的中国城市中,职业学校是一个产生新社会阶层的优选场所。首先,职业学校从结构和意识层面上生产一个独立的年轻人阶层群体;其次,职业学校打造的相似学生背景和共同生活空间有助于催生一种新的社会阶层和文化;再次,职业学校构建的新文化积极作用于学生的选择和生活方式,促使他们流向服务行业,成为半技术工人。总之,职业学校学生正处于一个新社会阶层初级阶段：共享着相似的生活方式、生活机遇、市场地位和有限的社会流动。     

写作教学与创造性思维的培养

分析写作和创造性思维的相互促进的关系，结合实际探讨怎样通过写作教学提高学生的写作能力和思维创新能力。     

On invariance and randomization under factor permutation in fractional factorial designs

This paper establishes the spectrum invariance of the information matrix under an arbitrary subgroup Г of the group Δ of factor permutations. In addition, it provides the randomized unbiased estimation of a linear parametric function under the composition Ω°Г, where Ω is the group of level permutations. These two results are achieved for the most practical partitioning of the whole parametric vector using the concepts of Г-closed and admissibility of a parametric subvector. Applications are given with an explicit illustration using the minimal resolution III design setting for the 2³ factorial.     

全球化背景下云南多样性民族文化的碰撞与发展

文化多样性对人类来讲就像生物多样性对维持生物平衡那样必不可少,它是人类持续和谐发展的根本保证.云南是一个多民族的边疆省份,民族的多样性决定了其文化的多样性.经济全球化的发展为云南各民族不同文化之间的交流和交融提供了新的历史机遇,同时也加剧了各民族文化之间的碰撞.在此背景下,我们必须努力做到"文化自觉",尊重文化个性,加强文化的调适,推进文化整合,这样才能实现保护、传承和发展云南民族文化多样性的目标.     

Influences on the effectiveness of peer interaction: children's level of cognitive development and the relative ability of partners

Studies of peer interaction among children have generally shown that this experience aids performance, or at the very least does not result in poorer performance in relation to control conditions. Furthermore, working with a more able partner has been found to be a particularly effective form of peer interaction. In contrast, a model proposed by Karmiloff-Smith suggests that at certain phases of cognitive development children may ignore feedback and information from task activities. These two ideas were tested in a study where pairs of 6–7 year old children had to balance a beam on a fulcrum during a computer task. The performance on a post-test did not support either viewpoint. Children who were working with a more able partner were found to perform significantly worse than other children. The findings of a second study suggested that this effect may have been due to the more able children having an incomplete understanding of the computer task and they may have dominated social interaction thereby restricting the progress of the less able pupil. The findings from these two studies indicate that peer interaction can result in poorer learning outcomes, and that Karmiloff-Smith's model should include the possibility of peer interaction effects.     

Asymptotic relative efficiencies of r-estimators of location

A table of asymptotic relative efficiencies of a large variety of R-estimators is given and some of its uses discussed.The family of distributions used includes both those common in the robustness literature and those that correspondent to various rank tests for location.