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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) JURNAL PENDIDIKAN TAMBUSAI 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 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 Sinergi : Jurnal Ilmiah Multidisiplin Inventa: Journal of Science, Technology, and Innovation
Harman Amir
Universitas Negeri Padang
Aerospace Engineering 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 Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Pengaruh Deklinasi Dan Asensiorekta (Ra) Matahari Terhadap Suhu Ekstrim Di Sumatera Barat Tahun 2020-2024 Aditya Zein Oktavianto; Letmi Dwiridal; Harman Amir; Hidayati Hidayati
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/ezyxrb29

Abstract

This study investigates the influence of solar declination and right ascension on extreme temperature variability in West Sumatra during the 2020–2024 period using a quantitative empirical framework. Monthly climatological observations were integrated with astronomical parameters calculated through high-precision algorithms to construct a harmonically structured time series dataset. The results reveal that solar declination primarily governs the amplitude of seasonal temperature variation, while right ascension regulates temporal synchronization, producing observable phase shifts between astronomical forcing and atmospheric response. Harmonic analysis demonstrates that these relationships extend beyond linear correlations by capturing periodic patterns characterized by amplitude and phase metrics. Furthermore, residual components indicate the presence of external modulators, particularly sea surface temperature anomalies and large-scale climate variability, which alter the magnitude and timing of extreme temperature events. The combined analytical approach confirms that tropical atmospheric dynamics are shaped by interactions between deterministic astronomical cycles and stochastic environmental influences, offering a more robust basis for predictive climatological modeling and advancing the understanding of solar–atmosphere coupling in equatorial regions.  
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.  
Analisis Variabilitas Curah Hujan Dan Pengaruhnya Terhadap Masa Tanam Kentang Di Kabupaten Kerinci Agil Fauziyah; Harman Amir; Letmi Dwiridal; Syafri
Sinergi : Jurnal Ilmiah Multidisiplin Vol. 2 No. 4 (2026): Sinergi: Jurnal Ilmiah Multidisiplin
Publisher : PT. AHLAL PUBLISHER NUSANTARA

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Abstract

Rainfall variability is a critical factor influencing the success of agricultural activities, particularly in determining the potato planting season in highland areas such as Kerinci Regency. Although this region has high and relatively stable rainfall, changes in rainfall patterns over time can potentially create uncertainty in determining the optimal planting season. This study aims to analyze rainfall variability and its impact on the potato planting season in Kerinci Regency for the 2015–2024 period. The method used is descriptive quantitative research with a statistical analysis approach. The data used are daily rainfall data from the Meteorology, Climatology, and Geophysics Agency (BMKG), processed into monthly data, and potato planting season data from the Statistics Indonesia (BPS). The analysis was conducted using descriptive statistical calculations including the mean, standard deviation, and coefficient of variation (CV), as well as Pearson correlation analysis and simple linear regression. The results show that rainfall variability in Kerinci Regency is relatively low, with CV values ​​<20% in most months, indicating a relatively stable rainfall pattern. February, June, and July are recommended as the initial planting season due to their greater rainfall stability. Meanwhile, the correlation analysis results showed a positive relationship between rainfall and planting season, with a coefficient value of 0.346, but it was not statistically significant (p>0.05). This suggests that besides rainfall, other factors influence the potato planting season in the study area. Keywords: Rainfall Variability, Planting Season, Potatoes, Regression, Kerinci Regency.   Abstrak Variabilitas curah hujan merupakan salah satu faktor penting yang memengaruhi keberhasilan kegiatan pertanian, khususnya dalam penentuan masa tanam tanaman kentang di wilayah dataran tinggi seperti Kabupaten Kerinci. Meskipun wilayah ini memiliki curah hujan yang tinggi dan relatif stabil, perubahan pola hujan antar waktu berpotensi menimbulkan ketidakpastian dalam menentukan waktu tanam yang optimal. Penelitian ini bertujuan untuk menganalisis variabilitas curah hujan serta pengaruhnya terhadap masa tanam kentang di Kabupaten Kerinci periode 2015–2024. Metode yang digunakan adalah penelitian kuantitatif deskriptif dengan pendekatan analisis statistik. Data yang digunakan berupa data curah hujan harian dari BMKG yang diolah menjadi data bulanan serta data masa tanam kentang dari BPS. Analisis dilakukan menggunakan perhitungan statistik deskriptif meliputi rata-rata, simpangan baku, dan koefisien variasi (CV), serta analisis korelasi Pearson dan regresi linear sederhana. Hasil penelitian menunjukkan bahwa variabilitas curah hujan di Kabupaten Kerinci tergolong rendah dengan nilai CV <20% pada sebagian besar bulan, yang menandakan pola curah hujan relatif stabil. Bulan Februari, Juni, dan Juli direkomendasikan sebagai awal masa tanam karena memiliki tingkat kestabilan curah hujan yang lebih baik. Sementara itu, hasil analisis korelasi menunjukkan hubungan positif antara curah hujan dan masa tanam dengan nilai koefisien sebesar 0,346, namun tidak signifikan secara statistik (p>0,05). Hal ini menunjukkan bahwa selain curah hujan, terdapat faktor lain yang turut memengaruhi penentuan masa tanam kentang di wilayah penelitian. Kata Kunci: Variabilitas Curah Hujan, Masa Tanam, Kentang, Regresi, Kabupaten Kerinci.
Analisis Variabilitas Curah Hujan Terhadap Kejadian Banjir di Kota Pekanbaru (Studi Kasus Curah Hujan Periode 2015-2024) Auliyaa Adzka; Harman Amir; Asrizal; Letmi Dwiridal
Sinergi : Jurnal Ilmiah Multidisiplin Vol. 2 No. 4 (2026): Sinergi: Jurnal Ilmiah Multidisiplin
Publisher : PT. AHLAL PUBLISHER NUSANTARA

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Abstract

Pekanbaru City is one of the regions in Indonesia characterized by a tropical climate with high rainfall and considerable variability, which increases the potential for hydrometeorological disasters such as flooding. The increasing frequency of flood events in recent years indicates a relationship with changes in rainfall patterns. This study aims to analyze rainfall variability and examine the relationship between rainfall and flood occurrence frequency in Pekanbaru City during the period 2015–2024. The research employs a descriptive quantitative method with a statistical analysis approach using monthly rainfall data obtained from the Meteorological, Climatological, and Geophysical Agency (BMKG) Sultan Syarif Kasim II Station and flood occurrence data from the Regional Disaster Management Agency (BPBD) of Pekanbaru City. Data analysis was conducted using Microsoft Excel and SPSS version 27, including coefficient of variation (CV), normality test, Pearson correlation, and simple linear regression. The results indicate that rainfall variability in Pekanbaru City falls within low to moderate categories, with CV values ranging from 8.02% to 24.51%, where the highest variability occurs in February, July, and September. The Pearson correlation analysis shows a strong and significant positive relationship between rainfall and flood occurrences, with a correlation coefficient of 0.659 and a significance value of 0.020 (p < 0.05). The regression analysis reveals that rainfall contributes 43.5% to the variation in flood events. Flood occurrences tend to be more frequent at the beginning and end of the year, particularly in January, April, October, November, and December. Keywords: Rainfall, Variability, Flooding, Correlation, Pekanbaru.   Abstrak Kota Pekanbaru merupakan salah satu wilayah di Indonesia yang memiliki karakteristik iklim tropis dengan curah hujan tinggi serta variabilitas yang cukup besar, sehingga berpotensi meningkatkan risiko bencana hidrometeorologis seperti banjir. Peningkatan kejadian banjir dalam beberapa tahun terakhir menunjukkan adanya keterkaitan dengan perubahan pola curah hujan. Penelitian ini bertujuan untuk menganalisis variabilitas curah hujan serta hubungan antara curah hujan dan frekuensi kejadian banjir di Kota Pekanbaru selama periode 2015–2024. Metode yang digunakan adalah penelitian kuantitatif deskriptif dengan pendekatan analisis statistik menggunakan data curah hujan bulanan dari BMKG Stasiun Sultan Syarif Kasim II dan data kejadian banjir dari BPBD Kota Pekanbaru. Analisis data dilakukan menggunakan Microsoft Excel dan SPSS versi 27 melalui uji statistik meliputi koefisien variasi (CV), uji normalitas, korelasi Pearson, dan regresi linier sederhana. Hasil penelitian menunjukkan bahwa variabilitas curah hujan di Kota Pekanbaru berada pada kategori rendah hingga sedang dengan nilai CV berkisar antara 8,02% hingga 24,51%, di mana variabilitas tertinggi terjadi pada bulan Februari, Juli, dan September. Hasil analisis korelasi menunjukkan adanya hubungan positif yang kuat dan signifikan antara curah hujan dan kejadian banjir dengan nilai koefisien korelasi sebesar 0,659 dan nilai signifikansi 0,020 (p < 0,05). Analisis regresi menunjukkan bahwa curah hujan memberikan kontribusi sebesar 43,5% terhadap variasi kejadian banjir. Kejadian banjir cenderung terjadi pada awal dan akhir tahun, terutama pada bulan Januari, April, Oktober, November, dan Desember. Kata kunci: Curah Hujan, Variabilitas, Banjir, Korelasi, Pekanbaru.
Analisis Validasi Buku Pengayaan EDUPARK Fisika Equator Bonjol untuk Memfasilitasi Penguasaan Konsep Peserta Didik SMA/MA Yuliawati, Yelli; Rifai, Hamdi; Amir, Harman; Emiliannur, Emiliannur
Jurnal Pendidikan Tambusai Vol. 10 No. 1 (2026)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v10i1.37965

Abstract

Penelitian ini bertujuan untuk menganalisis validasi buku pengayaan fisika Equator Bonjol dalam memfasilitasi penguasaan konsep peserta didik SMA/MA. Penelitian ini menggunakan model pengembangan EDUPARK dengan metode pengembangan Research and Development (R&D) yang difokuskan pada tahap validasi produk. Instrumen penelitian berupa lembar validasi yang diberikan pada tiga ahli, yang berisi aspek kelayakan materi, kelayakan kegrafikan, dan kesesuaian buku pengayaan. Teknik analisis data validitas menggunakan rumus momen kappa. Hasil penelitian ini menghasilkan buku pengayaan Edupark fisika Equator Bonjol dengan kriteria efektif dan layak digunakan sebagai bahan ajar tambahan, serta mampu meningkatkan kualitas pembelajaran fisika di SMA/MA. Penelitian ini memberikan kontribusi nyata dalam pengembangan bahan ajar inovatif yang relevan dengan kebutuhan peserta didik dan mendukung pencapaian tujuan pendidikan nasional.
Pengembangan Bahan Ajar Multimedia Interaktif Pemanasan Global Terintegrasi Etno - Joyful Learning untuk Memfasilitasi Keterampilan Berpikir Kritis Siswa Suryana, Febby; Asrizal, Asrizal; Amir, Harman; Riyasni, Selma
Jurnal Pendidikan Tambusai Vol. 10 No. 1 (2026)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v10i1.37966

Abstract

Studi ini membahas kebutuhan untuk meningkatkan keterampilan berpikir kritis siswa, yang tetap rendah meskipun pentingnya keterampilan abad ke-21, terutama 4C: berpikir kritis, kreativitas, komunikasi, dan kolaborasi, telah diakui. Dengan mengembangkan bahan ajar multimedia interaktif yang berlandaskan pembelajaran etno menyenangkan dan menggunakan model Penelitian dan Pengembangan Hannafin dan Peck, studi ini menganalisis kebutuhan serta menguji validitas dan kepraktisan produknya. Hasil menunjukkan bahwa kebutuhan saat ini untuk peningkatan berpikir kritis masih rendah (37,20), tetapi bahan ajar yang dikembangkan memperoleh skor sangat tinggi pada validitas (0,89) dan kepraktisan (90,45). Oleh karena itu, bahan ajar ini dianggap layak dan efektif sebagai alat untuk mendukung pengembangan kemampuan berpikir kritis siswa.
Co-Authors - Afrizal - Hamdi Aditio, Rama Aditya Zein Oktavianto Aflah Zaharo Agil Fauziyah Ahmad Fauzi Akmam Akmam Amali Putra Amirullah, Fajar Fikri Anzuye, Ivo Jihan Aprimanda Mulya Rizki, Rifa Ari Nuryadi Arsy, Suci Annisya Asrizal Asrizal Aulia Fitri Auliyaa Adzka Bana, Vrielsha Bavitra, Bavitra Chairunnas Chairunnas Chyntia Arman Daya, Ellen Kurniawati Denandra, Alza Desi Anriani Dwina Melisa Emiliannur Emiliannur Fadhila Ulfa Jhora Fadilla Septiani Fajri, Muhamad Fajri Fajri, Mukhlis Surito Fatni Mufit Fauziah Fauziah Fitri, Leni Fitri, Leni Aziyus Fitri, Mutiara Nurul Fuja Novitra Gustika Yonanda Hamdi , Hamdi Hamdi Hamdi Hamdi Rifai Handayani, Silvia Sri Hayyu Yumna Hermanda, Richi Junia Hidayati Hidayati Hidayati Hidayati Hufri Hufri Ihsania Ikrima Kinanti Iing Pebrika Isti, Aulia Janna, Anisa Juliana Dekriani Khaira Ummah, Kuntum Letmi Dwiridal Letmi Dwiridal Madinah, Nur Magribi, Fatin Maharani, Trimike Mahrizal Mahrizal Mairizwan, Mairizwan Masril Masril Maulida, Yulia Mia Azhari Miftahul Arrazi Mona Trisna Cahyati Muhammad Hafiz Mulyadi, Endri Murtiani Murtiani Mutiara Novichri, Viona Nabila, Yafiatul Nanda, Popi Nira Aslinda Nofi Yendri Sudiar Novia Deswira Novia Liza, Diva Pakhrur Razi Permata, Annisa Pramita Syafrina Putri, Shinta Maharani Putri, Zikra Mulyadi Rahmat Hidayat Ratnawulan Ratnawulan . Retna Junia Rifi Wasrika Rifqa Hayati Rinadi, Aulia Riri Jonuarti Riri Jonuarti Risky Wahyuni Riyasni, Selma Rozi, Hanifsyah Saint Saputra Salsabila, Salsabila Saqilah, Alya Sari, Mona Sari, Mona Berlian Sari, Reza Novita Sendi Mutia Solly Aryza Sovia Marsilin Stivani Suherman, Dea Suci Khairani Suherman, Dea Stivani Sumanti, Syahputri Suryana, Febby Syaflita, Dina Syafri Syafriani Syafriani Syafriani, Syafriani Syafriani, - Syair Nandi Syerly Kumala Vera Yunita Wardatul Fajriyaty Wulandari, Mia Yasni, Yuli Yelvi Elia Yendri Sudiar, Nofi Yenni Darvina Yosi Elsa Wahyuny Yulhendri Yulhendri Yuliawati, Yelli Yulkifli Yulkifli Yunia, Yunia Zatil Ismah, Amirah Zikri, Ahmad Raihan Zulhendra Zulhendra Zulhendra Zulhendra Zulhendra