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All Journal Schrödinger: Journal of Physics Education
Lee, Mei Chi
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From Tradition to Innovation: Exploring the Impact of Seurunee Kalee Based Ethnoscience in Guided Inquiry Physics Learning Elvida, Elvida; Lee, Mei Chi
Schrödinger: Journal of Physics Education Vol. 6 No. 3 (2025): September
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/sjpe.v6i3.2203

Abstract

Purpose of the study: This study aims to examine the effect of the guided inquiry learning model integrated with an ethnoscience approach using the Seurunee Kalee context on students’ critical thinking skills in learning sound waves at Dewantara 1 State Senior High School. Methodology: This study used a mixed-method approach with an explanatory sequential design and a quasi-experimental Non-Equivalent Control Group Design. Data were collected using tests, questionnaires, and interviews. Learning tools included worksheets and guidebooks. Data analysis employed SPSS version 25 for quantitative analysis and the Miles and Huberman model for qualitative review. Main Findings: The guided inquiry learning model integrated with an ethnoscience approach using the Seurunee Kalee significantly improved students’ critical thinking skills on sound waves. The experimental group’s mean score increased from 31.81 to 78.63, while the control group rose from 29.09 to 68.18. The t-test result (Sig. = 0.039 < 0.05) confirmed a significant difference. Student responses reached 86.79%, categorized as very strong. Novelty/Originality of this study: This study introduces the integration of a guided inquiry learning model with an ethnoscience approach using the Seurunee Kalee context in physics learning. The novelty lies in combining local cultural values with scientific inquiry to enhance students’ critical thinking skills, providing a new framework for contextualized and culturally relevant science education.
How Temperature Shapes Diode Performance: An Experimental Study on Rectifier, Avalanche, and Zener Diodes Lee, Mei Chi; Purnamasari, Indah; Kovalenko, Kirill
Schrödinger: Journal of Physics Education Vol. 7 No. 1 (2026): February
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/sjpe.v7i1.2757

Abstract

Purpose of the study: The purpose of this study is to experimentally analyze the effect of temperature on the internal resistance of rectifier, avalanche, and Zener diodes by measuring their current–voltage characteristics across different operating temperatures. Methodology: This study employed an experimental method using two digital multimeters (Sanwa CD800a), a K-type thermocouple (Omega), a DC power supply (GW Instek GPS-3030), an aluminum container, and an electric heater. Data were recorded manually and analyzed using Microsoft Excel for I–V plotting and temperature coefficient calculations. Main Findings: The rectifier, avalanche, and Zener diodes exhibited distinct I–V characteristics and temperature-dependent behavior. Maximum forward currents were 264.8 mA (rectifier), 299.4 mA (avalanche), and 37.25 mA (Zener). Temperature coefficients showed negative values for avalanche diodes and positive values for Zener diodes. Internal resistance increased with temperature for all diodes, with rectifier Rd ranging from 0.185 Ω to 0.2 Ω, avalanche Rd from 0.233 Ω to 0.25 Ω, and Zener Rd from 0.1 Ω to 0.125 Ω. Novelty/Originality of this study: This study presents a novel experimental comparison of rectifier, avalanche, and Zener diodes by simultaneously evaluating internal resistance and temperature resistivity coefficients under identical thermal conditions. The results provide new empirical insights into diode-specific thermal behavior, advancing current knowledge on temperature-sensitive performance in practical electronic applications.
Co-Authors Elvida Elvida Indah Purnamasari Kovalenko, Kirill