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Abstract. "Online Learning" has been commonly viewed as a mechanism for empowering improved learning outcome, increased flexibility of aligning the individual need of learners, and better quality of educational interaction. In fact, a lot of "digitized" and "ready-to-use" learning and teaching resources are already available online; nevertheless, we must not confuse quantity and quality, as these resources may just continue to perpetuate teacher-centred approaches, rather than student-centred approaches. The present research aimed to compare the educational values, learning effectiveness, students and teachers' perceptions of a new online educational paradigm -Situated Game-based Learning with Traditional Web-based Learning in secondary education in Hong Kong. A combination of quantitative and qualitative research methods were employed for data collection and analysis. Results showed that, under the present research settings, although no significant difference of students' learning outcome with respect to these two approaches was found, the participating students and teachers were quite positive towards the educational paradigm of Situated Game-based Learning. This provides vital insights and a basis for further investigating the paradigm's application and development for learning and teaching.

Triac cycloconverters useful for driving induction motors in teaching laboratories must employ converter blanking techniques to avoid short-circuiting of input phases through the triacs. Three simple blanking schemes are described and compared in terms of their relative limitations and suitability for the motor drive application.

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