Chengling Zhao

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The basic elements of a search engine process are crawling, storage, indexing and ranking algorithms. The current approach towards design of search engines is monolithic and infrastructure-heavy. In present paper, we discuss a modularized and a light-weight approach towards the search engine process using the merits of cloud computing. The cloud-based(More)
Generally speaking, in the e-learning systems, a course is modeled as a graph, where each node represents a knowledge node (KU) and two nodes are connected to form a semantic network. The desired knowledge is provided by the student as a direct request or from search results, mapping the owned knowledge onto the target knowledge. How to select a learning(More)
Web service is a new service-oriented computing paradigm which poses the unique security challenges due to its inherent heterogeneity and highly dynamic nature. A key challenge in Web service security is the design of effective access control schemas. However, traditional role-based access control (RBAC) model can not meet the dynamic and context(More)
RSS is the first letter abbreviations of English Rich Site Summary (enriches the Web site summary ) or Really Simple Syndication (really simple merger ), it is a kind of simple and easy way to share the content among different Web sites, usually used in news and other Web sites arranged in order, such as blog. We designed and implemented a distributed(More)
This paper explains some of the ideals and characters about PLE (Personal Learning Environment). And introduce web2.0 social software and technology to construct PLE, where there is the difficulty for learners to integrate these dispersive tools and technologies. So it proposes a framework for an open source Personal Learning Environment which is called(More)
The oncogenic potential of Notch activation is observed in many instances including lung tumorigenesis, but the associated molecular regulatory mechanism has not been thoroughly defined. It has been demonstrated that hypoxia can act as one of the major stimuli in the progression of many types of tumorigenesis. This study was designed to examine the(More)
Distance learning context means that the learners in a digital learning environment achieve their learning objectives through self-spaced learning or collaborative learning, studying the knowledge contents, passing several tests and acquiring the knowledge they needed. In this context, learners face several learning problems, such as studying the same(More)
Personal knowledge management (PKM) plays a very important role in improving individualpsilas skills and ability. While Web2.0 is centered in user experience, creating knowledge and two-ways communication, thus Web2.0 concepts seem to be an ideal fit with Nonaka's SECI approach opening new doors for PKM systems. According to analyzing the PKM and characters(More)
The new crop of learning content management system (LCMS), designed to create, store, assemble and deliver personalized e-learning content at the object level, are likely the closest application yet to bridging knowledge management and learning management. Selecting and implementing a LCMS will be one of the largest IT projects tackled by many(More)