The development of Learners' Key Competencies (LKCs) is one of the goals of the basic education core curriculum that is currently being used in Thailand. Therefore, learning activities that enhance LKCs are essential for all teachers. The objectives of this research were to develop a Scientific Imagineering (SIG) learning activity through Facebook in enhancing LKC development and to study its effectiveness. A research and development method was used in this study. A total of 30 students of grade 11 which selected using purposive sampling participated in the learning activity. A self-assessment of LKCs form was used to investigate the situation in a physics class, before and after participation in the learning activity. The research results showed that SIG learning activity through Facebook consisted of six steps in the form of Imagine, Study, Design, Develop, Present, and Evaluate. The evaluation results by five experts concerning the suitability of this learning activity indicated that it could be used to enhance LKCs and had great potential to be implemented. Comparing the students' self-assessment with regard to LKCs, it was clear that there was a significant overall increase (p<.05). The comparison of students' selfassessment to the LKCs for each component also found that the skills of communication, thinking and learning, problem-solving, and technological application increased significantly (p<.05). The results of this study support the view that SIG learning activity through Facebook could enhance the LKCs of students.
Dye sensitized solar cells (DSSCs) consist of photoanodes (dye adsorbed porous semiconductor film), electrolytes and counter electrodes. Nanostructured materials play important parts in both the photoanodes and the counter electrodes, while dyes are there to absorb photons and generate electron-hole pairs and electrolytes are there to transfer electrons from the photoanodes to the counter electrodes. In this study, to enhance light absorption and minimize electron-hole recombination, Ag nanoparticles and MgO nanolayer were coated on TiO2, respectively. To enable a long lifetime, i.e. avoiding liquid electrolyte leakage, quasi-solid-state (QSS) DSSCs were fabricated. PtSn nanoparticles were prepared by a simple chemical reduction method on graphene oxide (GO) to compare with conventional Pt catalyst on FTO substrates as counter electrodes. An average efficiency of the QSS DSSCs with PtSn/GO co-catalysts was found to outperform that of the QSS DSSCs with conventional Pt catalyst. A mixed microstructure of the PtSn/GO co-catalyst was observed. Although, PtSn2 and Pt2Sn3 phases were suggested by XRD, in a small region observed by EDX-STEM, it was found that C, O and Si were distributed uniformly on the graphene oxide film. Pt was also distributed uniformly, but the signal was low so there were only a few X-Ray counts across the image. There was no sign of Pt being concentrated in the particles. However, Sn was found to be concentrated in the particles without any other elements.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.