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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Pendas : Jurnah Ilmiah Pendidikan Dasar IRJE (Indonesian Research Journal in Education) JURNAL PENDIDIKAN TAMBUSAI JOURNAL OF SCIENCE AND SOCIAL RESEARCH Jurnal Ilmu Fisika Eksakta : Berkala Ilmiah Bidang MIPA MANAZHIM Pelita Eksakta Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat Jurnal ABDINUS : Jurnal Pengabdian Nusantara Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika Indo-MathEdu Intellectuals Journal Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam (JURRIMIPA) Georest: Geoscience, Remote Sensing, and Technology Journal of Innovative Physics Teaching (JIPT) Journal of Climate Change Society Physics Learning and Education Time in Physics: Journal for Theoretical, Instrumentation, Material-Molecular, and Education Physics Journal of Experimental and Applied Physics Inventa: Journal of Science, Technology, and Innovation Jurnal Penelitian Pembelajaran Fisika
Harman Amir
Universitas Negeri Padang
Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Analysis Of Cape Index And Total Index Thresholds Towards Cumulonimbus Cloud And Thunderstorm Events At Minangkabau International Airport Indah Yoseva Effendi; Nofi Yendri Sudiar; Ratnawulan; Harman Amir
Journal of Climate Change Society Vol. 4 No. 1 (2026)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jccs/Vol4-iss1/83

Abstract

Indonesia located along the equator and dominated by oceanic areas, is highly vulnerable to atmospheric dynamics and extreme convective weather. Minangkabau International Airport (BIM), situated in a coastal region of West Sumatra, is frequently affected by cumulonimbus (Cb) clouds and thunderstorms (TS), which pose risks to aviation safety. This study aims to determine the threshold values of the Convective Available Potential Energy (CAPE) index and the Total Totals Index (TT) that are appropriate for local conditions, based on radiosonde and synoptic observation data from 2019–2023, and verified using 2024 data. The CAPE and TT values were analyzed using Sturges’ method to determine frequency intervals and dichotomous analysis to establish threshold effectiveness. Results indicate that CAPE thresholds for Cb clouds range from 495 to 2679 J/kg, while TT thresholds for thunderstorms range from 43.5 to 47.4, depending on the seasonal variation (DJF, MAM, JJA, SON). These thresholds demonstrated strong performance in identifying convective weather events, thus serving as a useful reference for forecasting and enhancing flight safety at BIM.
Trends and Research Opportunities of Integration ESD and STEM in Science Education: A Bibliometric Analysis Nora Fauziah Daulay; Asrizal Asrizal; Harman Amir; Fauziah Ulmi; Azifa Feziyasti
Jurnal Penelitian Pembelajaran Fisika Vol. 12 No. 1 (2026): JPPF (Jurnal Penelitian Pembelajaran Fisika)
Publisher : Universitas Negeri Padang in collaboration with Association of Mathematics and Natural Sciences Institution for Education of Teaching Staff Indonesia (AMLI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jppf.v12i1.54

Abstract

Rapid changes of the 21st century require education to develop essential skills, sustainability literacy, and complex problem-solving abilities. However, many studies indicate that students’ competencies remain low, particularly in environmental awareness, critical thinking, and problem-solving. This condition highlights the need for innovation in science learning that is more relevant to global challenges. Therefore, integrating STEM (Science, Technology, Engineering, and Mathematics) with Education for Sustainable Development (ESD) has become an important approach to improving the quality of learning. This study aims to map research trends and opportunities related to ESD-STEM integration through bibliometric analysis. Data were collected from Scopus-indexed articles published between 2015 and 2025 and analyzed using VOSviewer, including publication performance, co-authorship, keyword occurrence, and thematic mapping analyses. The results show a significant increase in publications, particularly since 2020, focusing on STEM, sustainability, and pedagogical innovation. The dominant subject areas include social sciences, computer science, and engineering, with major contributions from the United States, Indonesia, and Malaysia. These findings confirm that ESD-STEM integration promotes interdisciplinary, contextual, and sustainability-oriented learning, while opening opportunities for future research.
Implementation of experiment-based learning to improve students’ understanding of corrosion concepts Utama, Fajar Darma; Ratnawulan, Ratnawulan; Fauzi, Ahmad; Amir, Harman; Fauziah, Dary Nasmi
Indonesian Research Journal in Education |IRJE| Vol. 10 No. 2 (2026): IRJE |Indonesian Research Journal in Education
Publisher : Universitas Jambi, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/irje.v10i2.49212

Abstract

This study aims to implement experiment-based learning to improve students’ understanding of corrosion concepts. Experimental learning was selected because it provides more contextual learning experiences and helps students understand scientific concepts through direct observation. The study was conducted through corrosion experiments using iron plates subjected to coating treatment and immersion in NaCl solution with different immersion durations. The learning activities were designed to develop students’ observation, analytical, and problem-solving skills during the experimental process. The study employed an experimental approach by involving students in observing changes in material conditions caused by corrosion processes. The research data were obtained from observation results, practicum documentation, and evaluations of students’ conceptual understanding after the learning activities were completed. The findings showed that experiment-based learning helped students better understand corrosion concepts and the factors influencing corrosion rates. In addition, students demonstrated increased engagement and learning interest during the practicum activities. These findings indicate that experiment-based learning can serve as an effective alternative learning approach to support more meaningful and applicable science learning.  
Pengaruh Elektrodeposisi Nanopartikel Perak pada Elektroda Reduced Graphene Oxide terhadap Stabilitas Superkapasitor Pratiwi Sanggusti; Nur hayati; Nina Aprilini; Rahmat Hidayat; Harman Amir; Hidayat Hidayat; Maria Ulfa; Yahdi Bin Rus
JURNAL RISET RUMPUN MATEMATIKA DAN ILMU PENGETAHUAN ALAM Vol. 5 No. 2 (2026): Agustus : JURRIMIPA: Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrimipa.v5i2.9756

Abstract

Supercapacitors have attracted considerable attention as energy storage devices owing to their high power density, rapid charge–discharge capability, and long cycle life. However, the electrochemical performance of reduced graphene oxide (rGO) is limited by the restacking phenomenon, which decreases the active surface area and restricts electrolyte ion diffusion. This study investigates the effect of silver (Ag) nanoparticle deposition on the stability of rGO electrodes using an electrodeposition method. Ag nanoparticles were deposited from a 5 mM AgNO₃ solution and the resulting electrodes were characterized by Scanning Electron Microscopy (SEM). Their electrochemical performance was evaluated using Cyclic Voltammetry (CV) and cycling stability tests up to 1,000 cycles. SEM analysis confirmed the successful and relatively homogeneous distribution of Ag nanoparticles on the rGO surface. The electrochemical results showed that the rGO/Ag electrode retained approximately 96–97% of its initial capacitance after 1,000 cycles, whereas the pristine rGO electrode retained only about 69%. These findings demonstrate that Ag deposition effectively enhances the structural stability and electrochemical performance of rGO electrodes, indicating their potential for high-performance supercapacitor applications.
Validity Validity Analysis of Joyful Learning Integrated Measurement E-Module for Student Knowledge and Creative Thinking Kuntum Khaira Ummah; Asrizal Asrizal; Harman Amir; Dea Stivani Suherman
Physics Learning and Education Vol. 4 No. 1 (2026): March Edition
Publisher : Department of Physics Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/ple.v4i1.324

Abstract

This study aims to analyze the validity of the development of digital teaching materials for measurement topics that integrate a joyful learning approach to facilitate students' knowledge and creative thinking skills. The applied method is Research and Development (R&D) based on the Hannafin and Peck model, which includes the analysis, design, and development stages. The validity of the teaching materials was assessed by three validators through aspects of material substance, learning design, visual communication, software utilization, integration of joyful learning, and knowledge and creative thinking skills. The results showed that the teaching materials were classified as very valid with an average score of 0.88. Specifically, the validity scores reached 0.84 for material substance, 0.93 for learning design, 0.90 for visual communication, 0.92 for software utilization, 0.89 for integration of joyful learning, and 0.82 for knowledge and creative thinking skills. These findings confirm the product's suitability to scientific standards, the Independent Curriculum, and 21st-century learning needs. The integration of digital technologies such as Canva, Liveworksheet, and Google Forms improves the quality of the teaching materials, resulting in a fun, interactive, and adaptive learning experience. Thus, this research contributes significantly to the development of innovative, valid, and effective physics learning media in strengthening students' knowledge and creative thinking skills.
Trends and Research Opportunities For Microcontroller-Based Flood Warning Systems: A Bibliometric Analysis Aulia Isti; Asrizal Asrizal; Harman Amir; Leni Aziyus Fitri
Journal of Experimental and Applied Physics Vol 4 No 1 (2026): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v4i1.114

Abstract

Indonesia as an archipelago has a high level of vulnerability to flood disasters, which is worsening due to climate change, rapid urbanization, and weak mitigation systems. Ideally, an early warning system that is responsive, accurate, affordable and easy to implement in vulnerable areas is needed. While microcontrollers offer a potentially effective technological solution, most research is still limited to small prototypes without regard to long-term predictability or community participation. This study aims to evaluate the development, focus, and prospects of microcontroller-based flood warning system research using a quantitative bibliometric approach. A total of 200 articles from 2015-2025 were collected through Publish or Perish and analyzed using VOSviewer. The results showed, first, a significant increase in publications occurred in 2024, namely 29 articles. Second, word network visualization resulted in the mapping of 87 keywords in 7 clusters. Third, data overlay visualization resulted in a shift in focus to IoT integration, the latest microcontrollers, cloud-based monitoring. Fourth, data density analysis confirms the dominance of technical aspects, where keywords such as microcontroller, flood early warning system, and flood become the center of attention with the highest density level. The implications of these findings provide direction for the development of a more adaptive, inclusive, and applicable flood warning system in disaster mitigation.
Design of a Gravity Acceleration Measurement System Using a Pendulum Oscillation Tool and Tracker Analysis Annisa Permata; Asrizal Asrizal; Harman Amir; Mona Sari
Journal of Experimental and Applied Physics Vol 4 No 1 (2026): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v4i1.162

Abstract

Experiment has a crucial role in physics, one of the fundamental science for research and technology. This research focuses on gravitation and utilizes methods of experimental design and execution. Measuring gravitation is a frequently studied topic and related to the oscillation pendulum's harmonic. In practice, pendulum oscillations are often still calculated manually without visualizing the pendulum's trajectory during oscillation. With modern learning tools development, harmonic oscillations' measurements can be calculated and analysed by using video tracking software, for example, by generating graphs. A static pendulum with a string in three lengths: 50 cm, 60 cm, and 70 cm is required. The swinging pendulum loaded with a 100-gram weight and filmed by a camera. The recordings were analysed using the tracker software. The results were displayed as a sinusoidal waveform plotted from the points along the pendulum's path during oscillation.
Analisis Hubungan Komposisi Unsur SiO₂ pada Material Tuf Vulkanik Lampung di Hatta Bakauheni Menggunakan Portable XRF sebagai Metode Pendukung Kemagnetan Batuan dalam Menentukan Sifat Magnetiknya Novia Deswira; Hamdi Rifai; Ahmad Fauzi; Harman Amir
Journal of Science, Technology, and Innovation Vol 1 No 3 (2026): : April: Inventa: Journal of Science, Technology, and Innovation
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/ezzxgs33

Abstract

This study investigates the relationship between SiO₂ composition and magnetic properties of Lampung Tuff from Hatta Bekauheni using an integrated approach combining rock magnetism and portable geochemical analysis. Magnetic susceptibility measurements were conducted using a Bartington MS2B sensor at low and high frequencies to determine χlf and χfd (%), while elemental composition was analyzed using Portable X-Ray Fluorescence (Portable XRF). The results indicate that all samples exhibit ferrimagnetic behavior, reflecting the presence of magnetic minerals such as magnetite or titanomagnetite with varying concentrations and grain sizes. The χfd (%) values suggest a mixture of superparamagnetic and coarser grains, indicating heterogeneous depositional and post-depositional processes. SiO₂ content varies among samples, representing local geochemical differentiation of volcanic material. However, regression analysis shows a very weak correlation between SiO₂ and magnetic parameters, as indicated by low coefficients of determination. These findings demonstrate that magnetic properties are primarily controlled by mineralogical factors rather than silica composition. The integration of magnetic susceptibility and Portable XRF provides an efficient, non-destructive framework for comprehensive volcanic material characterization.  
KARAKTERISASI GEOKIMIA UNSUR MAYOR DAN UNSUR JEJAK PADA PUMICE HASIL ERUPSI KALDERA MANINJAU, SUMATERA BARAT Nahdatul Zakkiyah; Hamdi Rifai; Harman Amir; Fadhila Ulfa Jhora
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 03 (2026): Volume 11 No. 03, September 2026 Processed
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i03.62912

Abstract

Pumice is a silica-rich volcanic product that provides important information on magma characteristics and petrogenetic processes. This study aims to characterize the major and trace element geochemistry of Pumice from the Maninjau Caldera, West Sumatra. Pumice samples were analyzed to determine their major and trace element compositions and interpreted based on magma geochemistry. The results show that the Pumice is dominated by SiO₂ (75.33%) and Al₂O₃ (17.46%), whereas K₂O, Fe₂O₃, CaO, and TiO₂ occur in lower concentrations. Trace elements are dominated by Th, Rb, and Sr, while Zr, Y, and Nb occur in relatively low amounts. These geochemical characteristics indicate that the Pumice originated from felsic magma with rhyolitic to dacitic composition that experienced advanced magmatic differentiation through crystal fractionation, particularly of plagioclase. This study demonstrates that pXRF is an effective, rapid, efficient, and non-destructive method for preliminary geochemical characterization of volcanic rocks.
KARAKTERISTIK GEOKIMIA GREY TO CREAM COLORED PUMICE GUNUNG TANDIKAT DAN IMPLIKASINYA TERHADAP PROSES PEMBENTUKAN Atilla Farah Diva; Hamdi Rifai; Ahmad Fauzi; Harman Amir
JOURNAL OF SCIENCE AND SOCIAL RESEARCH Vol. 9 No. 4 (2026): August 2026 (1)
Publisher : Smart Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54314/jssr.v9i4.6811

Abstract

Grey to cream colored pumice merupakan batuan piroklastik berpori yang terbentuk akibat erupsi eksplosif dan merekam karakteristik geokimia magma. Penelitian ini bertujuan menganalisis karakteristik geokimia grey to cream colored pumice Gunung Tandikat serta menginterpretasikan implikasinya terhadap proses pembentukan. Analisis dilakukan terhadap tiga sampel menggunakan portable X-ray fluorescence (pXRF) untuk mengidentifikasi unsur utama dan unsur jejak. Hasil penelitian menunjukkan bahwa unsur utama yang terdeteksi meliputi Si, Al, K, Ca, dan Fe, sedangkan unsur jejak terdiri atas Rb, Sr, Y, Zr, dan Th dengan variasi konsentrasi pada setiap sampel. Sampel TDK25-04 menunjukkan karakteristik geokimia paling lengkap berdasarkan jumlah unsur yang terdeteksi. Variasi komposisi unsur utama dan unsur jejak mengindikasikan adanya heterogenitas geokimia yang berkaitan dengan proses diferensiasi dan kristalisasi magma sebelum erupsi. Analisis geokimia menggunakan pXRF mampu memberikan informasi awal mengenai karakteristik grey to cream colored pumice Gunung Tandikat serta implikasinya terhadap proses pembentukan.
Co-Authors - Hamdi Aditio, Rama Aditya Zein Oktavianto Aflah Zaharo Afrizal Afrizal Ahmad Fauzi Akmam Akmam Amali Putra Amirullah, Fajar Fikri Annisa Permata Anzuye, Ivo Jihan Aprimanda Mulya Rizki, Rifa Ari Nuryadi Arsy, Suci Annisya Asrizal Asrizal Asrizal Asrizal Atilla Farah Diva Aulia Fitri Aulia Isti Azifa Feziyasti Bana, Vrielsha Bavitra, Bavitra Chairunnas Chairunnas Chyntia Arman Daya, Ellen Kurniawati Dea Stivani Suherman Denandra, Alza Desi Anriani Dwina Melisa Emiliannur Emiliannur Fadhila Ulfa Jhora Fadilla Septiani Fajri, Muhamad Fajri Fajri, Mukhlis Surito Fatni Mufit Fauzi Ahmad Muda Fauziah Fauziah Fauziah Ulmi Fauziah, Dary Nasmi Ferdi Agusrianto Fitri, Leni Fitri, Mutiara Nurul Fuja Novitra Gustika Yonanda Hamdi , Hamdi Hamdi Hamdi Hamdi Rifai Handayani, Silvia Sri Hayyu Yumna Hermanda, Richi Junia Hidayat Hidayat Hidayati Hidayati Hidayati Hidayati Hufri Hufri Ihsania Ikrima Kinanti Iing Pebrika Indah Yoseva Effendi Janna, Anisa Juliana Dekriani Kuntum Khaira Ummah Leni Aziyus Fitri Leni Aziyus Fitri Letmi Dwiridal Letmi Dwiridal Madinah, Nur Magribi, Fatin Mahrizal Mahrizal Mairizwan, Mairizwan Maria Ulfa Masril Masril Mia Azhari Miftahul Arrazi Mona Sari Mona Trisna Cahyati Muhammad Hafiz Mulyadi, Endri Murtiani Murtiani Mutiara Novichri, Viona Nabila, Yafiatul Nahdatul Zakkiyah Nanda, Popi Nina Aprilini Nira Aslinda Nofi Yendri Sudiar Nofi Yendri Sudiar Nora Fauziah Daulay Novia Deswira Novia Liza, Diva Nur Hayati Pakhrur Razi Pramita Syafrina Pratiwi Sanggusti Putri, Shinta Maharani Putri, Zikra Mulyadi Rahmat Hidayat Ratnawulan . Retna Junia Rifi Wasrika Rifqa Hayati Rinadi, Aulia Riri Jonuarti Risky Wahyuni Riyasni, Selma Rozi, Hanifsyah Saint Saputra Salsabila, Salsabila Saqilah, Alya Sari, Mona Berlian Sari, Reza Novita Sendi Mutia Sovia Marsilin Stivani Suherman, Dea Suci Khairani Suherman, Dea Stivani Sumanti, Syahputri Suryana, Febby Syaflita, Dina Syafriani Syafriani Syafriani, Syafriani Syafriani, - Syair Nandi Syerly Kumala Utama, Fajar Darma Vera Yunita Wardatul Fajriyaty Wulandari, Mia Yahdi Bin Rus Yasni, Yuli Yelvi Elia Yendri Sudiar, Nofi Yenni Darvina Yosi Elsa Wahyuny Yulhendri Yulhendri Yulia Maulida Yuliawati, Yelli Yulkifli Yulkifli Yunia, Yunia Zatil Ismah, Amirah Zikri, Ahmad Raihan Zulhendra Zulhendra Zulhendra Zulhendra