DSpace collection: 期刊論文

Statistical model for predicting roles and effects in learning community

Tue, 27 Mar 2012 10:54:25 GMT

title: Statistical model for predicting roles and effects in learning community abstract: Functional roles may explain the learning performance of groups. Detecting a functional role is critical for promoting group learning performance in computer-supported collaborative learning environments. However, it is not easy for teachers to identify the functional roles played by students in a web-based learning group, or the relationship between roles and group performance. In a web learning system, interactions among group members can be recorded as a large corpus for further analysis. Tools can then be developed to assist teachers to recognise the roles played by group members and determine the best intervention strategy to support group learning. This study designed a method to identify automatically the role played by students, through an analysis of their online collaborative learning interactions. A regression prediction strategy was proposed to predict group performance according to identified functional roles. Experimental results from a study of 82 students showed that the accuracy of detecting functional roles was acceptable, and the prediction of learning performance is useful for most functional roles except opinion-giver and harmoniser. Finally, three grouping strategies for collaborative learning are proposed from the perspective of functional role-distribution. Teachers can, therefore, recognise the status of group members' participation by identifying roles and reorganising the group to increase learning performance.

The Hamiltonian problem on distance-hereditary graphs

Wed, 07 Jul 2010 01:06:48 GMT

title: The Hamiltonian problem on distance-hereditary graphs abstract: In this paper, we first present an O(n + m)-time sequential algorithm to solve the Hamiltonian problem on a distance-hereditary graph G, where n and m are the number of vertices and edges of G, respectively. This algorithm is faster than the previous best

Radix-r non-adjacent form and its application to pairing-based cryptosystem

Wed, 07 Jul 2010 01:06:45 GMT

title: Radix-r non-adjacent form and its application to pairing-based cryptosystem abstract: Recently, the radix-3 representation of integers is used for the efficient implementation of pairing based cryptosystems. In this paper, we propose non-adjacent form of radix-r representation (rNAF) and efficient algorithms for generating rNAF. The number

MUREX: A mutable replica control scheme for structured peer-to-peer storage systems

Wed, 07 Jul 2010 01:06:43 GMT

title: MUREX: A mutable replica control scheme for structured peer-to-peer storage systems abstract: This paper proposes MUREX, a mutable replica control scheme, to keep one-copy equivalence for synchronous replication in structured P2P storage systems. For synchronous replication in P2P networks, it is proper to adopt crash-recovery as the fault model;