Although the integration of virtual world in teaching and learning has been investigated, there is a scarcity of research considering its influence on assessing learners’ understanding and comparing it with traditional e-assessment tools such as that in Moodle quiz. In this research, a virtual reality (VR) game-based e-assessment application was proposed first. Subsequently, the study aims at (1) understanding whether the type of e-assessment method can affect students’ performance, and (2) investigating the difference in learners’ perceptions based on the type of e-assessment technology. A combination of quasi-pre-test and post-test experimental and survey research design methods were adopted. Overall, 32 undergraduate students were assigned to either control (N=17) or experimental (N=15) group. The key findings are (1) no statistical differences in students’ performance were found for both groups, and (2) significant differences between learners who completed the VR game-based e-assessment and those on the control group were found on perceived playfulness and ease of use. The conclusion drawn from the research outcomes is that a VR game-based e-assessment application is a successful approach to enhance learners’ engagement in evaluation sessions, although students may face a lack of experience in its use.

4-5 nm size InAs nanocrystals were prepared by spray pyrolysis technique on glass substrates from alkaline solution containing InCl 3 and As 2 O. X-Ray diffraction and absorption spectra suggested that the deposition conditions (deposition time and temperature) had a profound influence on the structure and thickness of deposited layers. The optical absorption band edges shifted to lower energy when increasing the thickness with respect to the bulk material. The marked blue shift of the optical absorption edge indicated a strong quantum confinement effect in InAs films.

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Investigations are made of the reliability of the Ta2O5 film capacitor in which the oxide films are fabricated by three different techniques: anodic, thermal oxidation, and ion‐implantation enhanced thermal oxidation. Annealing the oxide films with and without metal contacts are compared in order to isolate and identify the role of contact interdiffusion on the films electrical properties. A model is proposed to account for the degradation by a process of Au metal–oxide interdiffusion. The current–voltage, capacitance–voltage, and the breakdown fields of all oxide films are studied as a function of annealing temperature.

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