开放灵活的分布式学习环境

为了帮助设计者创建开放、灵活的分布式E-Learning环境,该文提出了一个E-Learning框架模型,从八个维度列出了E-Learning设计中需要考虑的关键问题:机构,教学,技术,界面设计,评价,管理,资源支持,伦理。     

浅谈计算机应用基础网络课程栏目构建

本文从网络课程要借助互联网的四大优势实现教学全过程的角度出发,介绍了笔者制作的计算机应用基础网络课程的栏目构建。     

Adaptive progressive download based on the MPEG-4 file format

In this paper we describe how progressive download and adaptive streaming can be combined into a simple and efficient streaming framework. Based on the MPEG-4 file format (MP4) we use HTTP for transport and argue that these two components are sufficient for specifying an open streaming architecture. The client selects appropriate chunks from the MP4 file to be transferred based on (1) the header information (i.e. the "moov" box) in the first part of the file and (2) his observation of network throughput. The framework is completely client driven which allows for better server scalability and reduces signalling overhead. We discuss architecture and implementation issues such as complexity, interoperability and scalability and compare to 3GPP PSS Re1-6 adaptive streaming when appropriate. Measurements from a simple MP4/HTTP streaming client are presented showing that appropriate chunks are selected such that increased reliability is achieved.     

明星与政治

Bono vs.Pretty Much Eyerything博诺vs .几乎每件事Bono befriends O’Neill and Ghana President JohnKufuor. His Case:You name it,he’s trying to fix it:hunger,education,health care,orphans,whatever makes peopleunhappy;lately,he's pushing debt relief for the ThirdWorld nations and stopping the spread of AIDS in Africa.     

希望与安慰

查理去医院探望他太太。“你觉得怎样?”他坐在床边,问道。身旁的多莉微笑地看着他,一头黑发铺在白色的枕头上。“我很好。”多莉平静地说。在查理看来,她显得苍老无力;脸色如死一般的苍白,眼睛下面垂着黑色的眼袋。“你好像很累,”查理说。“没有睡觉吗?”“昨晚我有点睡不着。”多莉没有提到她的病痛——她不想让丈夫担心。     

1919-1922年土耳其人民的民族解放斗争

土耳其是在伟大的十月社会主义革命的影响之下,首先掀起民族解放运动的国家之一.十月革命中诞生的苏维埃国家,引起了土耳其人民群众的深刻同情.苏联政府放弃了对土耳其领土的一切侵害,放弃了沙皇政府在不平等条约(特权条约制度)的基础上所获得的损害土耳其人民利益的经济和法律的权益.苏联政府公布了沙皇俄国同英、法、意关于瓜分土耳其的密约,揭穿了协约国的侵略计划.     

开明教育

强制性教育在大自然这一方面是没有疑问的,大自然很早以前就为我们制定了这一法规。然而,像所有强制性法规一样,自然的法规既无情又带有盲目性。无知和明知故犯会得到同样坏的下场,无能和犯罪也会遭到同样的惩罚。大自然甚至不需先斩后奏,而是斩而不奏,你只能自己去琢磨为什么被打了耳光。我们通常所说的教育(即有人类参与的教育,因此我叫它人工教育),目的就是弥补大自然教育的不足,就是让孩子在接受大自然教育之前做必要的准备,消除他的无能与无知,教他不去明知故犯,让他学会识别大自然喜怒哀乐的前兆,避免被打耳光。简言之,一切人为的教育…     

High antenatal maternal anxiety is related to ADHD symptoms, externalizing problems, and anxiety in 8- and 9-year-olds

Associations between antenatal maternal anxiety, measured with the State Trait Anxiety Inventory, and disorders in 8- and 9-year-olds were studied prospectively in 71 normal mothers and their 72 firstborns. Clinical scales were completed by the mother, the child, the teacher, and an external observer. Hierarchical multiple regression analyses showed that maternal state anxiety during pregnancy explained 22%, 15%, and 9% of the variance in cross-situational attention deficit hyperactivity disorder symptoms, externalizing problems, and self-report anxiety, respectively, even after controlling for child's gender, parents' educational level, smoking during pregnancy, birth weight, and postnatal maternal anxiety. Anxiety at 12 to 22 weeks postmenstrual age turned out to be a significant independent predictor whereas anxiety at 32 to 40 weeks was not. Results are consistent with a fetal programming hypothesis.     

住家保姆的英文要求

住家保姆是指海外申请人取得签证获准离境去加拿大从事住家保姆职业的妇女。住家保姆计划是指加拿大签证官签发雇佣许可证给海外申请人,允许其来加拿大的私人家庭从事照顾孩子、老人和残疾人的工作,她们必须居住在私人