Yiwei Cao

Learning As a Service: A Web-Based Learning Framework for Communities of Professionals on the Web 2.0

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Mobile Community Cloud Computing: Emerges and Evolves

With the advent of mobile smart phones, new types of virtual communities arrived, i.e. mobile communities. Mobile communities, with respect to their IT needs, introduce new requirements compared to traditional online web communities. On the other hand, cloud computing is emerging as computing concept that promises provision of computational resources on demand and abstraction of technical details from the clients. We propose Mobile Community Cloud Platform (MCCP) as a cloud computing system that can leverage the full potential of mobile community growth. An analysis of the core requirements of common mobile communities is provided before we present the design of our cloud computing architecture that supports building and evolving of mobile communities.

Pattern-Based cross media social network analysis for technology enhanced learning in europe

It is extremely challenging to get an overview of the state-of-the-art in technology enhanced learning in Europe. Rapid technological and pedagogical innovations, constantly changing markets, a vivid number of small and medium enterprises, complex policy processes, ongoing political and societal debates on the pros and cons of technology enhanced leaning, combined with many languages and different cultures, make it almost impossible for people to be informed. We want to introduce the media base and the measure tools for pattern-based cross media social network analysis, created by the PROLEARN network of excellence in professional learning. The main goal of this endeavour is the reduction of complexity for actors in digital social networks by applying ideas from social software and already successful methods for complexity reduction, such as information visualization, social network analysis and pattern languages.

Mobile Web Services for Collaborative Learning

Since learning nowadays is conceptualized as a social system within communities of practice, the best way to learn is with others, in groups. In the past few years, there has been an increasing focus on social software applications as a result of the rapid development of new web technologies. Furthermore, mobile and ubiquitous technologies have provided capabilities for more sophisticated open social systems, where mobile knowledge sharing is the norm. In this paper, we explore the use of these concepts for learning and present a smart phone driven mobile Web Services architecture for collaborative learning.

Learn-as-you-go: new ways of cloud-based micro-learning for the mobile web

Micro-learning refers to short-term learning activities on small learning units. In our contemporary mobile/web society, micro-learning pertains to small pieces of knowledge based on web resources. Micro-learning falls into the group of informal learning processes. The existing web and mobile services have great potential to support informal learning processes, especially micro-learning. However, several specific aspects need to be considered. In this paper, we propose a micro-learning model based on three technical aspects: (i) ubiquitous learning resource acquisition; (ii) cloud-based data management; and (iii) tag-based regulation of learning processes and content. A micro-learning prototype consisting of an Android application and a web browser add-on is evaluated in the use case of bilingual vocabulary learning. The initial prototype evaluation study shows promising results in enhanced flexibility in personal learning content creation and increased efficiency in filling knowledge gaps.

Building mobile multimedia services: a hybrid cloud computing approach

Mobile multimedia services are in high demand, but their development comes at high costs. The emergent computing paradigm cloud computing has great potential to embrace these issues. In fact, we are at the early stage of the coalescence of cloud computing, mobile multimedia and the Web. Motivated by the tremendous success story of the Web based on its simplicity principles, we argue for a comprehensive review on current practices of web and mobile multimedia cloud computing techniques for avoiding frictions. We draw on experience from the development of advanced collaborative multimedia web applications utilizing multimedia metadata standards like MPEG-7 and real-time communication protocols like XMPP. We propose our i5CLoud, a hybrid cloud architecture, which serves as a substrate for scalable and fast time-to-market mobile multimedia services. This paper demonstrates the applicability of emerging cloud computing concepts for mobile multimedia.

A Hypermedia Afghan Sites and Monuments Database

Cultural heritage management is an excellent application domain for geographical hypermedia information systems. Many people with different tasks and levels of profession like fieldworkers, researchers, project and campaign officers, cultural bureaucrats etc. collaboratively producing and consuming different media like photographs, video, drawings, books, etc. must deal with exact geographic information about moveable or unmovable objects of interest. Implemented information systems must obey all standards in the different domains to overcome classical failures of isolated solutions which do not scale beyond the scope of a single project. We present a conceptual approach which integrates geographic information, multimedia information, cultural heritage information and collaborative aspects in a single information model. This conceptual approach was used to design and implement a web-based information system on top of a single commercial database covering all mentioned aspects. This information system was deployed for a project in the conservation of cultural heritage in Afghanistan to prove the validity of the concepts.

ACIS: intergenerational community learning supported by a hypermedia Afghan sites and monuments database

Intergenerational learning is based on processing experiences from one generation to another. However, this process is up to now mostly based on face to face communication neglecting the capabilities of computer supported learning communities. In this paper we describe ACIS (Afghan Community IS), a system that has been designed to support intergenerational learning communities by geographical hypermedia information systems in the area of cultural heritage. ACIS is designed to bring together generations of scientists in cultural heritage management which has been disrupted by the civil war and the Taliban regime in Afghanistan. ACIS has been deployed for a project in the conservation of cultural heritage in Afghanistan to prove the validity of the concepts.

Mobile Access to MPEG-7 Based Multimedia Services

Multimedia information systems have been developed into service-ware. With the paradigms of web services, service oriented architectures (SOA), and Web 2.0 widgets, multimedia has become truly ubiquitous. However, interoperability, scalability, reliability and security are arising challenges at mobile multimedia service development. This paper focuses on the analysis, design, development and evaluation of a middleware that allows access from mobile devices to a bundle of multimedia services. The services are based on the international multimedia metadata description standard MPEG-7. The implementation is based on new generation of service-oriented application servers called Lightweight Application Server (LAS). Mobile web services refer to the fact that mobile servers host web services. A prototype was developed as a proof of concept, showing how to access MPEG-7 based multimedia services from a Mobile Host and the analysis results of providing MPEG-7 based multimedia services in the form of web services from the Mobile Host to other mobile devices. An alternative solution is to apply enterprise service bus technology as the middleware. The performance evaluation results of both approaches show the reliable accessibility of MPEG-7 based multimedia services via the enterprise service bus solution.

Social Network Analysis of 45,000 Schools: A Case Study of Technology Enhanced Learning in Europe

Social networks make an essential contribution to knowledge sharing in our fast moving and changing world. However, it is difficult to apply new techniques to the complex, firm and Europe-wide differing educational systems. And this process for technology enhanced learning is still evolving and challenging. This paper presents the research results of applying social network analysis methods to a real and lively social network which intends to enhance the cooperation and knowledge sharing among over 45,000 European schools within the eTwinning network. We developed a web-based tool for network analysis and the visualization of various network views and data mining results as proof of concept. This prototype is evaluated on the educational social network eTwinning coordinated by the European Schoolnet, with special regard to its network structure and collaboration activity.