#40 An e-book (short for electronic book ,or EBook), also known as a digital book, is an e-text that forms the digital media equivalent of a conventional printed book , sometimes restricted with a digital rights management system. An E-book, as defined by the Oxford Dictionary of English, is "an electronic version of a printed book which can be read on a personal computer or hand-held device designed specifically for this purpose". [1] E-books are usually read on dedicated hardware devices known as e-Readers or e-book devices . Personal computers and some cell phones can also be used to read e-books. 维基百科, http://en.wikipedia.org/wiki/E-book
#48 对比目前全国各级各类教育网站、特别是教育资源库的建设,是否还停留在上个世纪 80 年代的思维定势,还着眼于课程素材和课件等内容建设上,从 Google 协作平台、百会等身上,可以看到,未来教育资源库的建设将向着学习环境建设方向发展,具体如何发展,你去研究一下 Google 协作平台和百会就知道了。 让教师象写博客一样自主设计学习环境。
#59 As cloud computing platforms proliferate, developers have more and more choices to build and run all of their apps. Different cloud computing platforms serve different types of applications. Facebook provides a platform for building consumer social applications. Amazon and Google offer general purpose web application platform with Amazon having a focus on CPU & storage-intensive applications. Force.com is cloud computing for the enterprise. Our cloud computing platform is 100% focused on delivering on the specific requirements for enterprise business applications. The sweet spot for Force.com are applications that store structured, relational data, implement business logic with Workflow rules, approval processes and/or custom code, use forms based data entry, use Web browser or mobile device clients, can integrate with other applications, can scale up/down from a few to thousands of users, need sub second response time, are available 99.9% of the time, require authenticated, highly secured access and may need built in reporting/analytics. To this end, the force.com includes a rich set of infrastructure, application and operational services to meet the needs of the world’s most sophisticated and security-conscious enterprises.
#65 云计算的定义,是指任何情况,计算工作是在远程位置(在云端) ,而不是在您的台式机或便携式设备。 “ 云计算”是指由几十万甚至上百万台廉价的服务器所组成的网络,为用户提供你所需要的计算机服务,这是近年来计算机科学领域中的分布式处理 (Distributed Computing) 、并行处理 (Parallel Computing) 和网格计算 (Grid Computing) 的新发展。“云计算”将大规模的计算机阵列连接成一个向全球用户提供计算机服务的社会化机构,用户只需要一个能够上网的设备,比如一台笔记本或者手机,就可以获得自己需要的一切计算机服务。这意味着人们使用计算机的需求也可以作为一种商品进行流通,就像煤气、水电一样实现高效的社会化服务,取用方便,费用低廉。 这将是信息科技发展的一个重要的转折,个人是否拥有计算机已不再重要,也不需要购买和在电脑中安装大量套装软件,只需要接入到“云服务”即可。显然,“云计算”将改变传统以个人计算机为基础的生产模式,最终改变人们获取信息、分享内容和互相沟通的方式。 What is Cloud Computing? An emerging computing paradigm where data and services reside in massively scalable data centers and can be ubiquitously accessed from any connected devices over the internet.