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9. A Flipped Classroom: Learning Experiences in Programming

Author

Yong, Su Ting, Tiong, Kung Ming, Chan, Andy, and Khiew, Poi Sim

Abstract

This study explored students' perceptions of a flipped classroom for an introductory programming class. Students were required to watch video lectures and read lecture notes in advance (pre-class self-study) to prepare themselves for the in-class lectures and tutorials. A mix-methods approach was employed: quantitative survey (n=204) and qualitative interview (n=7) were administered simultaneously. The results suggested that students are not fully ready for a flipped classroom. Most of the students still prefer face-to-face in-class lectures and tutorials. The in-class activities have a positive impact on students' test performance, especially the male students. Peer learning however induces a negative impact on students' test performance, especially among the female students. Pre-class self-study has no impact on students' test performance, except for those without prior programming experience. Females outperform males even though they lack prior programming experience. Students, regardless of programming background, respond equally to a flipped classroom approach.

Published
2021
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17. Design and Implementation of Dialysate Temperature Control System for Hemodialysis: A Pilot Study

Author

Jabbar, Mohamed Haroon Abdul, Anandan Shanmugam, S., Khiew, Poi Sim, Angrisani, Leopoldo, Series editor, Arteaga, Marco, Series editor, Chakraborty, Samarjit, Series editor, Chen, Jiming, Series editor, Chen, Tan Kay, Series editor, Dillmann, Ruediger, Series editor, Duan, Haibin, Series editor, Ferrari, Gianluigi, Series editor, Ferre, Manuel, Series editor, Hirche, Sandra, Series editor, Jabbari, Faryar, Series editor, Kacprzyk, Janusz, Series editor, Khamis, Alaa, Series editor, Kroeger, Torsten, Series editor, Ming, Tan Cher, Series editor, Minker, Wolfgang, Series editor, Misra, Pradeep, Series editor, Möller, Sebastian, Series editor, Mukhopadhyay, Subhas Chandra, Series editor, Ning, Cun-Zheng, Series editor, Nishida, Toyoaki, Series editor, Panigrahi, Bijaya Ketan, Series editor, Pascucci, Federica, Series editor, Samad, Tariq, Series editor, Seng, Gan Woon, Series editor, Veiga, Germano, Series editor, Wu, Haitao, Series editor, Zhang, Junjie James, Series editor, Thalmann, Daniel, editor, Subhashini, N, editor, Mohanaprasad, K., editor, and Murugan, M S Bala, editor

Published
2018
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23. Augmenting Light‐to‐Heat Conversion Through 3D Scalable Palm Fiber for Energy Efficient Photothermal Solar Steam Generation.

Author

Lim, Kok‐Loong, Liow, Jo‐Ey, Ong, Wee‐Jun, Khiew, Poi Sim, Jani, Nur Aimi, Chiu, Wee Siong, Tan, Swee‐Tiam, and Haw, Choon‐Yian

Subjects
PHOTOTHERMAL effect, HEAT recovery, ARCHITECTURAL details, SOLAR heating, HEAT losses, POLYACRYLONITRILES
Abstract

Tackling water scarcity is a pressing challenge, propelling recent advancements in solar steam generation (SSG). Recently, 3D photoabsorbers have outperformed their 2D counterparts in recovering light and minimizing heat losses, enabling a surge in exploring 3D materials and designs. Herein, 3D structures are fabricated using polydopamine (PDA) functionalized carbonized palm fibers (PDA c‐fiber) to shed light on the degree of improvement in SSG efficiency compared to their 2D counterpart. Specifically, two 3D models, a cone, and a cylindrical cup, are chosen for their inherent features, including a hollow cavity, circular base, and curved surface. These architectural elements play a crucial role in trapping light, facilitating reflections, and efficiently converting solar energy to heat through the photothermal effect. Scaling palm fibers from 2D to 3D significantly boosts SSG efficiency, from 67.9% to 103.7%, with water evaporation rate enhanced from 1.171 kg m−2 h−1 to 1.869 kg m−2 h−1. Substantially, the 3D cup demonstrates superior photothermal performance primarily attributed to its heat recovery feature of the cup wall structure and circular basal area, enabling prolonged light‐to‐heat conversion. These findings provide valuable insights and foundation for developing efficient solar‐driven 3D upcycled photoabsorbers in the future. [ABSTRACT FROM AUTHOR]

Published
2024
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41. State-of-the-Art Advances, Development, and Challenges of Metal Oxide Semiconductor Nanomaterials for Photothermal Solar Steam Generation

Author

Tan, Kar Woon, Yap, Chun Man, Zheng, Ziyue, Haw, Choon Yian, Khiew, Poi Sim, Chiu, Wee Siong, Tan, Kar Woon, Yap, Chun Man, Zheng, Ziyue, Haw, Choon Yian, Khiew, Poi Sim, and Chiu, Wee Siong

Abstract

Solar steam generation has drawn high levels of attention from the research community in recent years due to its wide application and abundantly available energy source—sunlight. To the best of the author's knowledge, a specialized overview of photothermal semiconductor solar steam generation has not been conducted to date. In this review, the recently reported solar evaporators using metal oxide semiconductors as the photoabsorber material are investigated, from the perspective of nanostructure, synthesis method, and installation method. A timeline sequence map is generated with the CiteSpace analysis tool to visualize the trend of metal oxide semiconductors as photoabsorbers. The nanostructure of metal oxide semiconductor is emphasized, due to its significant effect on regulating photothermal efficiency in solar steam generation. In addition, other considerations are suggested to enable a fair evaluation of future synthesized photoabsorbers, including cost, stability, reproducibility, recyclability, and regenerative ability. A brief summary of divergent application of solar steam generation is conducted to show the merits of solar steam generation, as well to provide insights for production of photoabsorbers targeted to varying usage and scenarios. Furthermore, the challenges and opportunities of metal oxide solar steam generation system are elaborated from the viewpoint of the authors, with the aim to provide useful insights for future development of photothermal solar steam generation. © 2022 Wiley-VCH GmbH

Published
2022

48. A mechanistic study of silver nanostructures incorporated reduced graphene oxide via flow synthesis approach

Author

Lau, Kam Sheng, Tan, Sin Tee, Ginting, Riski Titian, Khiew, Poi Sim, Chin, Siew Xian, Chia, Chin Hua, Lau, Kam Sheng, Tan, Sin Tee, Ginting, Riski Titian, Khiew, Poi Sim, Chin, Siew Xian, and Chia, Chin Hua

Abstract

In situ growth of silver nanostructures (AgNSs) and reduction of graphene oxide (rGO) were successfully performed using a one-step segmented flow reaction system. The detailed crystal growth mechanism of the AgNSs on the rGO was discussed. The relationship between the presence of AgNSs (nanoparticles and nanowires) on the rGO and the rGO’s electrochemical behaviour was investigated. In this report, it was found that the presence of silver nanoparticles (AgNPs) on the rGO’s surface enhances its specific capacitance by 400% as compared to rGO-based devices. This novel finding provides an alternative in designing future electronic devices.

Published
2020

49. A Flipped Classroom

Author

Yong, Su Ting, primary, Tiong, Kung Ming, additional, Chan, Andy, additional, and Khiew, Poi Sim, additional

Published
2021
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