Security for Multi-hop Communication of Two-tier Wireless Networks with Different Trust Degrees

Many effective strategies for enhancing network performance have been put forth for wireless communications' physical-layer security. Up until now, wireless communications security and privacy have been optimized based on a set assumption on the reliability or network tiers of certain wireless nodes. Eavesdroppers, unreliable relays, and trustworthy cooperative nodes are just a few examples of the various sorts of nodes that are frequently categorized. When working or sharing information for one another, wireless nodes in various networks may not always have perfect trust in one another. Modern wireless networks' security and privacy may be enhanced in large part by optimizing the network based on trust levels. To determine the path with the shortest total transmission time between the source and the destination while still ensuring that the private messages are not routed through the untrusted network tier, we put forth a novel approach. To examine the effects of the transmit SNR, node density, and the percentage of the illegitimate nodes on various network performance components, simulation results are provided

A framework for an online forum for a writing course.

The bane of teaching writing is that there is a scarcity of CALL (computer-assisted language learning) courseware that can effectively teach writing. Conventional CALL systems are unable to interact realistically and meaningfully with students and to provide the motivation for students to write. The success of e-Learning 2.0 that creatively applies technologies for social networking to education has pointed out a new direction for CALL. Based on insights from e-Learning 2.0, an online forum was developed and implemented as the CALL component of a writing course for ESL English as a second language) learners in a university in Malaysia. The online forum project was conceptualised with the specific aim of helping to achieve the objectives of the classroom-based writing course it complements. With proper planning and implementation, the forum technology can be successfully utilised to complement writing instruction. This paper presents the framework that was used to guide the designing of the forum. It describes the five basic components of the framework, that are course objectives, the model adopted for the forum, pedagogical considerations, control, and teacher role

Reviewing media literacy intervention studies for validity

This study is an examination of validity in published articles that have provided tests of the effectiveness of media literacy interventions. We identified 88 published tests of media literacy interventions then analyzed their content using five coding variables that indicated the degree to which authors of those studies established basic validity. We first conducted a meaning analysis to identify the definitions that authors of those studies presented for media literacy. Then we used those definitions to determine the extent to which those authors provided a complete (content validity) and accurate (face validity) operationalization in the design of their measures

Issues and challenges in courseware development : a project managers perspective.

Many educational institutes venturing into courseware development to create online learning materials for their own students are often not aware of the challenges that lie ahead in managing courseware development projects. This paper highlights the potential challenges a courseware development project may face. It discusses lessons learnt from development projects carried out in Malaysia for content and language-based courses. Particularly, real cases will be presented to highlight challenges and the steps that were taken to overcome them within the constraints of time, budget, curriculum demands, client expectations, and competencies of content providers