This research presents visualization model to introduce learning knowledge according to pedagogical relation of the concepts. In a course normally we covered hundred of concepts with interesting relationship. For the current study, we take a computer science course "Data Structure" and show some interesting aspects of the relationship of the concepts. The pedagogical relation involved of three bases: the syllabus relation dimension, the ontology relation dimension, and the dimension of the cognitive skills levels of the concepts. The cognitive skills levels means comprehension in term of verbs connect between the concepts and obtains prerequisite relation between the concepts such that, to understand, or apply, or analyze, etc. a particular concept the prerequisite concepts should be known.
Blockchain is an emerging technology that is used to address ownership, centrality, and security issues in different fields. The blockchain technology has converted centralized applications into decentralized and distributed ones. In existing sharing economy applications, there are issues related to low efficiency and high complexity of services. However, blockchain technology can be adopted to overcome these issues by effectively opening up secure information channels of the sharing economy industry and other related parties, encouraging industry integration and improving the ability of sharing economy organizations to readily gain required information. This paper discusses blockchain technology to enhance the development of insurance services by proposing a five-layer decentralized model using Ethereum platform. The Najm for Insurance Services Company in Saudi Arabia was employed in a case study for applying the proposed model to effectively solve the issue of online underwriting, and to securely and efficiently enhance the verification and validation of transactions. The paper concludes with a review of the lessons learned and provides suggestions for blockchain application development process.
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