Garuda - Garba Rujukan Digital

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

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

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.

Combined Ultrasonic and Thermal Treatment: Effects on Microbial Reduction and Protein Stability in Fresh Milk Lee, Mei Chi; Handayani, Atul; Po, Sing Huat
Schrödinger: Journal of Physics Education Vol. 7 No. 2 (2026): April
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/sjpe.v7i2.3082

Purpose of the study: This study aims to evaluate the effect of ultrasonic treatment combined with temperature variation on the inhibition of Escherichia coli and the preservation of protein content in fresh cow’s milk under controlled experimental conditions. Methodology: Experimental design; ultrasonic generator (60 kHz, 70 W); water bath temperature control (30°C, 40°C, 50°C); incubator shaker; laminar air flow; Total Plate Count (TPC) method; Kjeldahl method; colony counter; Nutrient Agar (NA) and Nutrient Broth (NB); two-way ANOVA; descriptive statistics; statistical software (SPSS). Main Findings: Ultrasonic treatment combined with temperature significantly reduced Escherichia coli counts, with the highest reduction (95.9%) achieved at 50°C for 30 minutes. Bacterial counts decreased progressively with increasing temperature and exposure time. Protein content remained relatively stable, ranging from 2.02% to 2.20%, indicating minimal degradation under treatment conditions. Novelty/Originality of this study: This study presents an integrated and statistically validated approach to simultaneously analyze microbial inactivation and protein stability using combined ultrasonic and thermal treatments. It demonstrates a synergistic interaction between acoustic cavitation and moderate temperature, offering a novel framework linking physical wave principles with biological systems in food processing.

Gasing Game: Ethnoscientific Exploration of Circular Motion in Physics Learning on the Coast of East Sumatra to Build the Character of Perseverance Jusmaniar, Jusmaniar; Riani, Imelda; Anderson, Eric C; Lee, Mei Chi; Oktavia, Sri Wina
Schrödinger: Journal of Physics Education Vol. 5 No. 1 (2024): March
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/sjpe.v5i1.902

Purpose of the study: The aim of this research is to explore the role of the traditional gasing game as a local wisdom in the coastal areas of East Sumatra in the context of Ethnoscience Physics learning about circular motion. Methodology: This research uses a naturalistic type of qualitative research method. The subjects in this research were secondary school physics teachers and local community leaders. Data collection techniques use interviews and observation instruments (direct observation). The data analysis technique uses the Miles and Huberman model. Main Findings: The findings of this research indicate that integrated ethnoscientific physics learning can make physics education more enjoyable, meaningful, and contribute to the development of students' perseverance. The integration of spinning top games into physics education not only enhances practical understanding of physics concepts but also has a positive impact on students' learning enthusiasm and character formation. Novelty/Originality of this study: This research introduces novelty through serving as a cultural preservation tool for the younger generation and as a means to develop physics learning strategies oriented towards ethnoscientific physics. The aim is to build an understanding of the taught circular motion material and foster perseverance in students' characters.

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

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

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.

Combined Ultrasonic and Thermal Treatment: Effects on Microbial Reduction and Protein Stability in Fresh Milk Lee, Mei Chi; Handayani, Atul; Po, Sing Huat
Schrödinger: Journal of Physics Education Vol. 7 No. 2 (2026): April
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/sjpe.v7i2.3082

Purpose of the study: This study aims to evaluate the effect of ultrasonic treatment combined with temperature variation on the inhibition of Escherichia coli and the preservation of protein content in fresh cow’s milk under controlled experimental conditions. Methodology: Experimental design; ultrasonic generator (60 kHz, 70 W); water bath temperature control (30°C, 40°C, 50°C); incubator shaker; laminar air flow; Total Plate Count (TPC) method; Kjeldahl method; colony counter; Nutrient Agar (NA) and Nutrient Broth (NB); two-way ANOVA; descriptive statistics; statistical software (SPSS). Main Findings: Ultrasonic treatment combined with temperature significantly reduced Escherichia coli counts, with the highest reduction (95.9%) achieved at 50°C for 30 minutes. Bacterial counts decreased progressively with increasing temperature and exposure time. Protein content remained relatively stable, ranging from 2.02% to 2.20%, indicating minimal degradation under treatment conditions. Novelty/Originality of this study: This study presents an integrated and statistically validated approach to simultaneously analyze microbial inactivation and protein stability using combined ultrasonic and thermal treatments. It demonstrates a synergistic interaction between acoustic cavitation and moderate temperature, offering a novel framework linking physical wave principles with biological systems in food processing.

Title

Found 7 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 7 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 7 Documents
Search