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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Pendidikan Fisika dan Teknologi Science, Technology, and Communication Journal
Nawi, Nina Diana
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Physics

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Electrical discharge of butane and propane for carbon plasma with air impurities, slightly ionized at high pressure Husein, Ikhsan Rahman; Nawi, Nina Diana; Hairi, Haryana Mohd
Science, Technology and Communication Journal Vol. 1 No. 3 (2021): SINTECHCOM Journal (June 2021)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v1i3.201

Abstract

This paper investigates the ionization of butane and propane gas in the formation of carbon plasma with air impurities. The formation of carbon plasma is designed and operated by using a commercial pencil graphite electrode with a directionally electrical discharge method of less than 3.5 kV, injecting butane and propane gas with a mixture of air, pressure variations into the tube. Experimental results show the voltage and current before and after the breakdown voltage. The density and temperature of the plasma carbon are calculated from the current and the breakdown voltage. These results depicts that the ionization of air at a pressure of 12 cmHg (570 V) produces a breakdown voltage of 530 – 570 V and current of 0.27 – 0.45 mA, whereas at pressure of 37 cmHg (1160 V) produces breakdown voltage of 900 – 1100 V and current of 0.46 – 0.6 mA. The ionization of the butane and propane (with impurities of air) at pressure of 26 cmHg (1199 V and 1137 V) produces breakdown voltage of 831 – 1202 V, 839 – 1138 V and current of 0.07 – 0.65 mA, 0.08 – 0.63 mA. At the pressure of 46 cmHg (1828 V and 1590 V) produces breakdown voltage of 1246 – 1781 V, 1021 – 1627 V and current of 0.04 – 0.99 mA, 0.05 – 1.12 mA. These results indicate that the carbon plasma density increases with the increase of electrical voltage. This report shows good agreements for developing the growth of carbon nano tube on the surface of cathode which is generally always followed by air impurities at high pressure.
Improving Critical Thinking Skills through a STEAM-Integrated SSCS Learning Model on Static Fluid Concepts Iljannah, Luk Luk; Parno, Parno; Sujito, Sujito; Nawi, Nina Diana
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 11 No 1 (2025): January-June
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpft.v11i1.8831

Abstract

Critical thinking skills in static fluid materials remains suboptimal, necessitating the implementation of an instructional model that effectively enhances this skill. The STEAM-integrated SSCS learning model presents a novel solution that is still rarely applied in educational settings. This study aims to examine the effect of this model on improving students' critical thinking skills in static fluid materials. A quasi-experimental design with a Pretest-Posttest Control Group was employed, involving Class XI students from SMA Negeri 1 Boyolangu Tulungagung. Participants were selected using a cluster random sampling technique, comprising 37 students in the experimental class (STEAM-integrated SSCS model) and 34 students in the control class (conventional model). The instrument used was a Critical Thinking Skills Test on static fluid material, consisting of nine essay questions validated with a reliability coefficient of 0.625 (medium category). The analysis revealed that the STEAM-integrated SSCS model significantly improved students' critical thinking skills,  as indicated by a significance value of 0.000. The experimental class obtained an N-Gain score of 0.678 (medium category), higher than the control class's score of 0.426 (medium category). N-Gain values for each static fluid submatter and critical thinking indicator were also consistently higher in the experimental class. Although improvements were observed, experimental class students still faced difficulties in problem-solving and decision-making, while control class students struggled with hypothesis testing. The model's effectiveness is further supported by a Cohen's d effect size of 1.997, categorized as “large”.  Future research should consider optimizing the learning time to complete the miniature products and increasing the number of pre-test and post-test items to allow for more comprehensive analysis of each submatter and could explore the application of STEAM-integrated SSCS across various physics topics to verify generalizability.
Analysis of Students' Critical Thinking Skills on the Topic of Electromagnetic Induction Fitri, Nurani; Parno; Munfaridah, Nuril; Nawi, Nina Diana
Jurnal Penelitian Pendidikan IPA Vol 11 No 3 (2025): March
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i3.10118

Abstract

Electromagnetic induction is one of the physics topics that is considered difficult. Research shows that students' critical thinking skills on this topic are weak. This study aims to determine the profile of high school students' critical thinking skills on this topic. The research method used is non-experimental quantitative descriptive research with a descriptive research form. Data were collected using essay test. The research sample was 22 students in 12th grade who had studied the topic of electromagnetic induction in one of the high schools in East Java, Indonesia. The sampling technique used is convenience sampling. The instrument used is in the form of a test named electromagnetic induction critical thinking skills instrument. Data were analysed using descriptive statistics. The results of the study showed that students' critical thinking skills are relatively low. Therefore, in learning, methods, models, and media are needed to help students improve their critical thinking skills.
Co-Authors Fitri, Nurani Hairi, Haryana Mohd Husein, Ikhsan Rahman Iljannah, Luk Luk Nuril Munfaridah, Nuril Parno Parno Parno Sujito Sujito