青年教师沙龙:校本教研的有效途径

课程改革的先行者面临"滞涨"的危机,立足实际、解决实践问题、发展教师实践性智慧的"青年教师沙龙"应运而生了。"沙龙"在改善教师学习、实践和反思的活动,促进教师可持续专业发展方面起到了积极的作用。     

从文化角度看英汉颜色词的象征意义

该文通过探讨英汉颜色词“红色”、“白色”、“黄色”在使用方面的异同,揭示了这三种颜色在英汉两种语言词汇中语义和文化方面的不同性;这也是跨文化交际中一个值得研究的课题。     

现代汉语释义基元词探索

释义基元词指用于辞书释义的最低限量基本词 ,具有基础性、元素性、限量性的特点。国外早在 2 0世纪 2 0年代即取得这方面研究成果 ,不久便付诸词典编纂实践。但迄今为止 ,汉语词典编纂尚无这方面尝试 ,仍然沿用传统的随机释义法 ,释义用词没有限量控制。笔者率先在这方面进行了探索性研究。在此概述此项研究的思路、成果及其应用价值。     

新课程标准要求下对地理教学的认识

在执行新课程标准时,地理课教学应注重知识的代表性和趣味性,以培养学生分析问题和解决问题的能力以及创新和综合实践的能力。     

矩阵与其高次伴随矩阵的特征根

讨论n阶方阵A与其对应的高次伴随矩阵A(m)的特征根,根据A的特征根给出了高次伴随矩阵A(m)的特征根的表达式,并利用数学归纳法证明了结论。     

美国高校接收国际学生政策的历史演进及其内在逻辑

美国高校接收国际学生政策的历史演进大致可以分为四个阶段,即萌芽期、发展期、成长期和动荡期。在不同的历史时期,有着不同的历史逻辑。通过研究各个时期美国高校接收国际学生政策的历史演进与内在逻辑,可以看出,萌芽期的国际学生接收政策侧重于加强国际理解,促进知识文化交流的理念模式;发展期的国际学生接收政策开始服务于国家战略,利用对外教育援助进行文化输出,扩大世界影响力;成长期和动荡期的国际学生接收政策侧重于吸引优秀人才“为我所用”,保持美国领跑世界的霸主地位,维护国家政治经济利益。     

也谈连动式--现代汉语语法教学札记

强调意义与形式相结合的语法分析原则,并据此将动词结构连用的几种情况分别划归复句或联合短语、偏正短语里,取消连动式这一概念.目的是消除语法分析的混乱局面,避免语法分析的复杂化、烦琐化,减少一些不必要的术语,从而使语法更简明、更实用.     

记忆全息性初论

探讨了记忆与心理过程、记忆与个性心理结构的联系 ,发现记忆中包含着其它所有心理现象的成分和功能 ,由此 ,提出了记忆具有全息心理特性、记忆活动具有全息规律的猜想。     

Basic fibroblast growth factor alleviates brain injury following global ischemia reperfusion in rabbits

The aim of this study was to explore the protective effect of basic fibroblast growth factor (bFGF) on brain injury following global ischemia reperfusion and its mechanisms. Brain injury following global ischemia was induced by four vessels occlusion and systemic hypotension. Twenty-four rabbits were randomized into three groups: group A, only dissection of vessels; group B, intravenous infusion of normal saline after reperfusion for 6 h; group C, 30 μg/kg bFGF injected intravenously at the onset of reperfusion, then infused with 10 μg/(kg·h) for 6 h. Serum neuron specific enolase (NSE), S-100B, tumor necrosis factor-α(TNF-α), interleukin-1 (IL-1), interleukin-8 (IL-8) were measured before ischemia, 30 min after ischemia, 0.5, 1, 3, 6 h after reperfusion. Brain water content was determined and cerebral histopathological damages were compared. NSE and S-100B were increased 1 h after reperfusion and reached their peaks 6 h after reperfusion, but were much higher in group B than those in group C 3, 6 h after reperfusion. In groups B and C, TNF-a was increased after ischemia and IL-1 and IL-8 were increased significantly 0.5 h after reperfusion, then reached their peaks 6 h, 3 h, 6 h after reperfusion respectively. TNF-a and IL-8 at the time points of 1 h and 3 h and IL-1 at 3 h and 6 h in group C were correspondingly lower than those in group B. These indices in group A were nearly unchanged. There were less severe cerebral histopathological damages in group C compared with group B, but no difference in brain water content. It could be concluded that bFGF alleviates brain injury following global ischemia and reperfusion by down-regulating expression of inflammatory factors and inhibiting their activities.     

Authorware的视频文件控制缺陷及解决方法

Authorware对视频控制存有缺陷:当页面上存有自定义按钮时,Mediapause函数对avi格式的视频文件的控制将不灵敏,并在鼠标划过这些自定义按钮时将会体现出来。利用热区交互代替按钮交互和转换视频文件格式的方法,可解决此问题。