Conference Presentations by K. Maher
Cyberspace refers to the boundless space known as the Internet. Cyber security is the body of rul... more Cyberspace refers to the boundless space known as the Internet. Cyber security is the body of rules put in place for the protection of this cyberspace. The increasing use of e-Learning systems has been documented by numerous studies and shows continuing growth; little attention has been given to the issue of security of e-Learning systems both in research and education. In this paper, we illustrate an approach to understanding, evaluating, monitoring, measuring and managing cyber security as it relates to e-Learning systems. Security of e-Learning systems represents a unique challenge as numerous systems are accessed and managed via the Internet by thousands of users over hundreds of networks. Moreover, this paper reveals the prevalence of internal cyber-attack as well as a lack of proper IT policies and procedures in e-Learning systems, in light of their standard architecture and their specific security requirements. Also, we discuss the most important security challenges that can be relevant for distributed e-learning systems. Because e-Learning systems are open, distributed and interconnected, then security becomes an important challenge in order to ensure that interested, and authorised, actors only have access to the right information at the appropriate time.
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Papers by K. Maher
European Journal of Wood and Wood …, 2006
Cork granules are produced as by-products and waste by the cork processing industries that make ‘... more Cork granules are produced as by-products and waste by the cork processing industries that make ‘bottle stoppers’ as a main product. These granules are of low density and could be used as lightweight aggregates for making concrete. This paper describes an investigation carried out to assess the compatibility of cork granules with cement for the manufacture of lightweight cementitious composites. Five different grades of cork granules varying in terms of size and density were investigated. The effects of extractives, particle size and density of the cork granules were studied. The results indicate that these parameters affect cement hydration in a complex way. At lower concentrations of cork (10%), only the extractives have an influence on hydration behaviour. At higher cork concentrations (20% and 30%), however, particle size and density also affect the compatibility. Nevertheless, cork granules are found to be compatible with cement. Korkgranulat entsteht in der korkverarbeitenden ...
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Conference Presentations by K. Maher
Papers by K. Maher