Anti-chloride permeability and anti-chloride corrodibility of a green high performance concrete admixture in concrete

1. Introduction In order to meet the demands of developing west zone of China and utilization of urban underground space, tunnel construction is increasingly paid more attention to in China. As is known, concrete is the main building material used in civil engineering, which is always affected and eroded by various ions in underground water, so the durability of concrete structure which is the main part of tunnels and underground projects, has been a hot subject for investigation in civil engi…     

Numerical estimation in adults with and without developmental dyscalculia

It has been hypothesized that developmental dyscalculia (DD) is either due to a defect of the approximate number system (ANS) or to an impaired access between that system and symbolic numbers. Several studies have tested these two hypotheses in children with DD but none has dealt with adults who had experienced DD as children.This study aimed to compare these two hypotheses in an adult population in order to investigate which deficits still persist at that age. To that aim, numerical estimation tasks were given to adults who had or had not experienced DD as a child. Three of the estimation tasks required a mapping between the ANS and symbolic numbers: participants had to estimate the number of same or different-sized dots presented by producing the corresponding Arabic number or, conversely, to produce the number of dots corresponding to a presented Arabic number. A fourth task did not require any processing of symbolic numbers; participants had to produce a collection of dots of the same numerosity as another one previously presented.Consistently, in all the four numerical tasks and irrespective of whether the tasks used symbolic numbers or not, the estimates of DD participants were less accurate than those of the control participants. These results indicate that adults who had experienced DD as children continue to demonstrate a less precise magnitude representation.     

剖析化学课本实验培养学生的创新迁移能力

介绍了在小学自然教学中，将演示实验让给学生做之后出现的新现象，从而证明了将部分演示实验交给学生做的教学实践符合自主学习的教育理念。     

仅起诉销售商时如何判定商标侵权 王祥华诉北京龙祥华夏商贸有限公司侵犯注册商标专用权纠纷案评析

基本案情 2007年6月28日,经商标局核准,台湾普钧有限公司将其第984057号注册商标专用权转让给台湾人王祥华,该商标由“优玛”、“U.MA”文字及方形外框、环形箭头等图形组成（以下简称“优玛U.MA”文字及图形组合商标）,核定使用商品为第17类：汽车隔热纸,大楼隔热纸,注册日为1997年4月21日。     

体育教学中的语言技巧

体育教学语言技巧有利于体育教学效果的提高。体育教师在教学中要努力做到：将繁琐的叙述转化为精练的概括，将抽象的表述辅以形象的语言描绘，将呆板的讲解化为有声有色的口决。同时要注意体育教学语言的科学性、准确性、生动性，以保证教学任务的有效完成。     

关于中老年人垂钓与健康的研究

垂钓(angling)是我国乃至全世界人民都十分喜爱的一项体育活动，但人们对它的健身价值还认识不够。文章采用座谈会，查阅资料法对中老年人垂钓健身价值进行研究。其结果发现垂钓不仅有利于人的生理健康而更有利于心理健康，建议我国中老年朋友多参加垂钓活动，国家和社会多提供垂钓场所，充分利用垂钓这一项目为中老年朋友的健康发挥其积极作用。     

社会主义新农村建设背景下山东省农村体育开展现状的多维审视

为了更好地认识和促进现阶段社会主义新农村建设目标下山东省农村体育的发展,从分析社会主义新农村建设目标的科学内涵着手,分析山东省农村体育基本现状及存在的问题,提出要树立科学发展观,积极构建社会主义新农村特色体育发展模式,采用文献资料法、问卷调查、实地考察及数理统计等方法,对山东省农村体育进行研究,对其发展有着重要的指导意义。