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Item ELearning Assessments, Issues, Mitigation Strategies, and the Future(IGI Global, 2022-06) Wambua, AnthonyELearning continues to offer the promise of revolutionizing education. Lower cost of education, learning anywhere, and personalized learning are just a few benefits of eLearning. The COVID-19 pandemic exacerbated the need for technology-mediated learning. eLearning assessments continue to be an open challenge in the context of eLearning. Both novice and experienced teachers grapple with assessing learners in online classes. Issues such as the nature of assessments, exam integrity, use of appropriate assessment tools are now getting increased attention from researchers. Existing research in eLearning tends to focus on the technology, its adoption, and factors affecting its success or lack of it. A paucity of research on e-assessments leads to limited insights for teachers and institutions. Consequently, this chapter focuses on e-assessments, given the critical role of assessment in any form of learning.Item Synthetic Methods for Titanium Dioxide Nanoparticles: A Review(IntechOpen, 2018) Nyamukamba, Pardon; Okoh, Omobola; Mungondor, Henry; Taziwa, Raymond; Zinya, SimcelileTitanium dioxide (TiO2) semiconductor nanoparticles are one kind of important and promising photocatalysts in photocatalysis because of their unique optical and electronic properties. Their properties, which are determined by the preparation method, are very crucial in photocatalysis. In this chapter, an overview was carried out on the different methods that are used or have been used to prepare titanium dioxide nanoparticles. There are various methods that can be used to synthesize TiO2 and the most commonly used methods include sol-gel process, chemical vapor deposition (CVD) and hydrothermal method among others. This review will focus on selected preparation methods of titanium dioxide photocatalyst.