Alzheimer disease and related dementias affect 15–20% of elderly people, and 60–70% of these suffer from sleep disturbances. Studies suggest that lighting can improve sleep. The key challenge is how to deliver light effectively. We have designed a lighting system that adjusts spectrum and irradiance on a 24-hour timetable to provide spatially uniform, shadow-free white light with CRI>85 and up to 1000 Lux for day vision and amber light for night vision. To aid sleep, melanopic illuminance varies over 3 orders of magnitude to enable strong suppression of melatonin in the morning/early afternoon, moderate suppression in the evening, and no suppression at night.

The use of a circuit simulator is more and more crucial in designing electrical and electronic gadgets. This technique makes it possible to obtain results when the hardware is unavailable or very costly. Simulations are widely used in the industry hence it is necessary to use it astutely. Authors tried to study an important concept about "Squaring a Signal" and further it is extended to design and simulation of phase meter. Squaring a sinusoidal lead doubling its frequency and adding the dc component. In this study squaring sine wave with frequency of 5KHz gives a negative cosine wave with frequency 10KHz along with a dc term of 2V. TINA software is used for this study. TINA software has ability to perform DC analysis, AC analysis and transient analysis. Transient analysis calculates the circuit response to various input waveforms. Results are analyzed using transient analysis for sinusoidal input.

Engaging Electrical Engineering (EE) students in a freshman general physics service course is challenging as they see little relationship between the topics and their major. Non-native speakers enrolled in a course taught in English face an additional challenge beyond understanding the basic physics, that is, understanding specialized English. These challenges are especially serious at second tier universities in Taiwan where the students’ knowledge of physics coming out of high school is based on memorization rather than understanding and whose comprehension of the English language is less than ideal. As a result, they easily tire, stop listening, and stop attending classes. We show that an active learning based approach increases both students’ enjoyment of physics and understanding of new physics concepts and English. Bilingual guided discovery worksheets (GD) for PhET interactive simulations, smartphone-based games, small group flashcard responses, and a website summarizing the ‘big idea’ to be presented in each time slot were developed. The effect of this teaching strategy was measured both quantitatively (grades) and qualitatively (student survey). While students agreed that games were most enjoyable, there was no consensus on which activities were most helpful. Strong attendance (relative to lecture based courses) up to the end of the course suggests that students found class time interesting and useful. GD were most effective for topics in which students had little prior knowledge. The subsequent addition of smartphone-based games increased attendance and reported enjoyment, but did not significantly modify the final grade.

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