UPSI Digital Repository (UDRep)
|
![]() |
|
Total records found : 2 |
1 | 2021 Article | Importance of safety in a workshop at schools for a safe and effective teaching and learning sessions SetVengidason, Sethuprakhash A.L. Dangerous situations can develop at any time in a workshop if the people who use the workshop are not alert. It can be very dangerous even though a simple mistake occurs when the safety procedures are compromised. This research aims to obtain the perception and comments from students regarding their knowledge about workshop safety in schools. The objective of this research is to acquire the perception and comments from Faculty of Technical and Vocational, Sultan Idris Education University students. There are 5 different questions distributed among the students for them to give their judgements. This study is an interview based approach. The data was collected by distributing the questions to 148 students and 35 student?s answers were randomly picked to be analysed. The students are expected to give their perception and comments based on their knowledge and observation about workshop safety and its practises in secondary schools. Results show that, around 40% of the students feel that a..... 698 hits |
2 | 2023 Article | Poly (acrylamide-co-acrylic acid)-based gel polymer electrolytes incorporated with sodium iodide for dye-sensitized solar cells (DSSCs) Sethuprakhash Vengidason Copolymers are materials with contrasting properties such as mechanical stability and electrical performance that can be linked together to enhance the flexibility of the polymer chain. In this present work, a series of poly(acrylamide-co-acrylic acid) (PAA)-based gel polymer electrolytes (GPEs) containing iodide/triiodide (I?/I3) redox mediator from sodium iodide (NaI) dopant salt was synthesized. Temperature-dependent ionic conductivity of the GPEs was observed using electrochemical impedance spectroscopy in the temperature range of 303363K. The GPE with 50 wt% of NaI salt (PAA-50) achieved the highest ionic conductivity (?) of 3.79 10?2 S cm?1 at ambient temperature with an activation energy of 0.098eV. FTIR was utilized to evaluate the formation of complexes between the copolymer and additives in the GPEs. The DSSCs were assembled by sandwiching the GPEs between a photoanode and platinum (Pt) counter electrode for photovoltaic studies. PAA-50 achieved the highest photovoltaic conve..... 280 hits |