Article history: Received 28 July 2010 Received in revised form 30 November 2010 Accepted 30 November 2010 Available online 13 December 2010

Students learn through a series of systemic and innovative learning activities instead of only learning resources. However, most e-Learning systems nowadays are resources-oriented instead of processoriented. In addition, existing systems are designed without adequate pedagogical principles and provide little capabilities to cater for different student’s individual needs. This paper investigates...

This paper proposes a new 3D modeling technique based on feature points using spatio-temporal relationship. Normally, the generation of a 3D model from a real scene requires the computation of the depth of the model vertices from a dense correspondence map of the whole image. This is very time consuming, plus it is also quite difficult to achieve an accurate depth. The proposed method can gener...

In this paper, we develop a system for active image-based rendering (IBR). Active IBR is a framework that is capable of estimating the final rendering quality and capturing the next view at the position where the rendering quality can be improved the most. The result is a nonuniform capturing scheme for IBR. Experimental results on synthetic scenes have shown that active IBR outperforms uniform...

We consider the problem of video stabilization: removing unwanted image perturbations due to unstable camera motions. We approach this problem from an image-based rendering (IBR) standpoint. Given an unstabilized video sequence, the task is to synthesize a new sequence as seen from a stabilized camera trajectory. This task is relatively straightforward if one has a Euclidean reconstruction of t...

This paper introduces the ISpec approach to interface specification. ISpec supports the development of interface specifications at various levels of formality and detail in a way compatible with objectoriented modelling techniques (UML). The incremental nature of the levels and the underlying formal framework of ISpec allow informal interface specifications to be made formal in steps. The body ...

In many domains, agent-based system modeling competes with equation-based approaches that identify system variables and evaluate or integrate sets of equations relating these variables. The distinction has been of great interest in a project that applies agent-based modeling to industrial supply networks, since virtually all computer-based modeling of such networks up to this point has used sys...

Implementation of agent based intelligent technologies in the environment of distance learning can individualize learning, enable the optimal use of learning resources and ensure effective interaction with all participants of the learning process. The paper presents agent classification for the modern distance learning environments, based on Anderson and Garrison’s model of interaction modes in...

In this paper we investigate the effect of different external representations on the process and product of collaborative computer modeling tasks. Shared representations can significantly influence the processes of modeling and communication. We compare pairs working on a collaborative modeling task using a text based model representation with others using a graphical representation. Results in...