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All Journal International Journal of Renewable Energy Development Journal of Degraded and Mining Lands Management JOIV : International Journal on Informatics Visualization AL ISHLAH Jurnal Pendidikan Emerging Science Journal JURNAL INTEGRASI JURNAL PENDIDIKAN TAMBUSAI Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat Sainstek : Jurnal Sains dan Teknologi Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika JIFP (Jurnal Ilmu Fisika dan Pembelajarannya) MASALIQ: Jurnal Pendidikan dan Sains Georest: Geoscience, Remote Sensing, and Technology Gudang Jurnal Multidisiplin Ilmu International Journal of Renewable Energy Development
Pakhrur Razi
Universitas Negeri Padang
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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Subsurface characterization and seismic risk mapping in Padang City using HVSR and resistivity data Octova, Adree; Razi, Pakhrur; Anaperta, Yoszi Mingsi
Journal of Degraded and Mining Lands Management Vol. 12 No. 4 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.124.8127

Abstract

Padang City, situated in a seismically active region, faces significant earthquake risk due to its complex geological structure. This study integrates passive seismic and geoelectrical resistivity methods to characterize subsurface conditions and map seismic vulnerability across 11 districts. Passive seismic data, collected from 84 microtremor stations, were analyzed using the Horizontal-to-Vertical Spectral Ratio (HVSR) method to derive dominant frequency (f?), amplification factor (A?), and seismic vulnerability index (Kg). High Kg values, indicating elevated seismic amplification potential, were observed in Koto Tangah, Kuranji, and parts of South and West Padang. Subsequently, geoelectrical surveys along five targeted lines revealed subsurface heterogeneities, including groundwater-saturated layers and weak sediment zones that heighten liquefaction risk. The integration of HVSR and resistivity data provided a robust framework for identifying high-risk areas with greater precision than single-method approaches. These findings offer critical input for seismic microzonation and urban disaster mitigation planning, underscoring the need for multi-method geophysical assessments in earthquake-prone urban settings.
Pengembangan Lembar Kerja Peserta Didik Pada Materi Fisika Kelas X Berbasis Blended Learning Berorientasi Literasi Skill R.I 4.0 Husna, Rahmi Juita; Razi, Pakhrur
Jurnal Pendidikan Tambusai Vol. 9 No. 2 (2025): Agustus
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i2.28149

Abstract

Sistem pendidikan indonesia saat ini menuntut peserta didik memiliki keterampilan-keterampilan yang dapat menjawab tantangan revolusi industri 4,0. Adapun salah satu keterampilan yang penting dikembangkan adalah literasi skill. Namun, pengintegrasian literasi skill dalam proses pembelajaran disekolah masih jarang ditemukan. Jenis penelitian yang digunakan dalam penelitian ini adalah research and development (R&D) dan objek penelitiannya adalah Lembar Kerja Peserta Didik berorientasi literasi skill RI 4.0. Model penelitian yang digunakan dalam penelitian ini adalah model penelitian ADDIE yang memiliki langkah-langkah: analisis, desain, pengembangan, implementasi, dan evaluasi. Analisis penelitian yang digunakan adalah analisis data deskriptif untuk menganalisis data. Menurut hasil analisis data yang telah dilakukan didapatkan nilai rata-rata validasi lembar kerja peserta didik adalah 86,4 sehingga berada pada kategori sangat valid dan nilai rata-rata praktikalitas lembar kerja peserta didik adalah 83,5 dengan kategori sangat praktis. Dapat disimpulkan bahwa lembar kerja peserta didik berorientasi literasi skill pada materi hukum newton serta usaha dan energi valid dan praktis sehingga dapat digunakan dalam proses pembelajaran fisika kelas x sma.
Pelatihan Kesiapsiagaan Menghadapi Bencana untuk Masyarakat yang Berada Di ‘’Seismic Gap’’ Desa Muara Siberut Razi, Pakhrur; Yohandri, Yohandri; Sudiar, Nofi Yendri; ifdil, ifdil; Thamrin, Thamrin; Asrizal, Asrizal
Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Vol 22, No 1 (2022): Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/sb.02460

Abstract

Tingginya potensi bencana di daerah seismic gap di kepulauan mentawai telah menjadi perhatian yang serius baik pemerintah pusat maupun daerah. Selain potensi gempa bumi daerah ini juga memiliki potensi diterjang tsunami jika gempa besar terjadi serta banjir. Oleh karena itu perlu dilakukan pelatihan berkelanjutan kepada masyarakat serta mengukur tingkat kesiapsiagaan mereka dalam menghadapi bencana. Program pelatihan ini merupakan bagian dari kegiatan untuk menciptakan desa/nagai tangguh bencana berdasarkan standar SNI desa tangguh necana dan Sendai framework disaster reduction. Selain peningkatan pengetahuan masyarakat tentang potensi bencana di seismic gap kepulauan mentawai, juga dilakukan pelatihan serta pengukuran tingkat kesiapsiagaan masyarakat terhadap bencana. Berdasarkan hasil survey yang laksanakan setelah dilakukan pelatihan, menunjukkan bahwa tingkat kesiapan Individu/keluarga terhadap kesiapsiagaan dalam menghadapi bencana berada pada level utama dengan skor >50.
Separation of Regional and Residual Anomalies Using GGMPlus Gravity Data in Panti Sub-District, West Sumatra Yasmin, Putri; Razi, Pakhrur; Izumi, Yuta
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6062

Abstract

This study addresses the limited application of GGMPlus satellite gravity data for regional and residual anomaly separation in geothermal exploration within Indonesia. The research aims to separate and analyze gravity anomalies to elucidate subsurface geological structures in Panti District, Pasaman Regency, West Sumatra. A quantitative-descriptive approach with an exploratory design was employed, utilizing secondary gravity data from the GGMPlus model comprising 4,537 measurement points at 200-meter intervals. Data processing involved Bouguer correction, Fourier transformation, and the application of a bandpass filter using Oasis Montaj software. The complete Bouguer anomaly in the study area ranges from –37.5 to –25.6 mGal. Frequency-based separation yielded regional anomalies ranging from –37.3 to –25.8 mGal, while residual anomalies varied between –0.77 and 0.72 mGal. The residual anomalies are interpreted as responses from shallow subsurface features, including sedimentary rocks and potential geothermal reservoirs. In contrast, the regional anomalies are associated with deeper geological structures, such as faults and intrusive bodies. These findings demonstrate that frequency-domain filtering provides an effective means of enhancing the interpretability of satellite-derived gravity data in geothermal investigations. The study confirms the utility of GGMPlus data and spectral filtering techniques in delineating subsurface targets and improving geophysical assessments for geothermal resource exploration.
Analisis Kebutuhan Pengembangan Aplikasi Mobile Learning Berbasis Android Sebagai Media Pembelajaran Fisika Melnix, Frennadito; Razi, Pakhrur
Jurnal Pendidikan Tambusai Vol. 8 No. 1 (2024): April 2024
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v8i1.13831

Abstract

Inovasi yang mendukung proses pembelajaran telah menjadi ciri perkembangan teknologi dalam pendidikan. Salah satu contohnya adalah pengembangan media pembelajaran baru. Penting bagi guru untuk mengembangkan inovasi dalam pembuatan media pembelajaran karena peran mereka yang strategis dalam proses belajar-mengajar. Contohnya, di SMA Negeri 7 Padang, Saat ini, penggunaan media pembelajaran fisika masih terbatas pada PowerPoint dengan gambar-gambar sederhana, yang seringkali menyebabkan kebosanan siswa karena kurangnya inovasi. menggali kebutuhan guru dan siswa terkait dengan penggunaan aplikasi mobile learning berbasis android dalam pembelajaran fisika merupakan tujuan dari penelitian ini. Metode yang diterapkan adalah metode deskriptif kualitatif, di mana analisis kebutuhan dilakukan secara mendalam. Pengumpulan data dilakukan melalui wawancara dengan guru dan penyebaran angket kepada siswa kelas XI. Hasil penelitian menunjukkan bahwa penggunaan media pembelajaran masih terbatas dan kurang bervariasi. Peran guru dalam pengembangan media pembelajaran juga terbatas, sehingga diperlukan inovasi yang mendesak dalam hal ini. Kesimpulan yang dapat diambil adalah bahwa media pembelajaran yang diterapkan oleh guru dalam pembelajaran fisika di SMA Negeri 7 Padang masih memerlukan pengembangan lebih lanjut untuk meningkatkan efektivitasnya.
Penggunaan Energi Terbarukan dalam Praktikum Fisika terhadap Pemahaman Konsep Siswa : Studi Kasus Penerapan di Sekolah Menengah Hamdi, Hamdi; Razi, Pakhrur; Saputri, Deby Yeriza
Jurnal Pendidikan Tambusai Vol. 9 No. 1 (2025)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penggunaan energi terbarukan dalam pendidikan, khususnya di bidang fisika, merupakan langkah penting dalam mempersiapkan generasi muda untuk menghadapi tantangan lingkungan yang semakin kompleks. Penelitian ini bertujuan untuk menganalisis penerapan energi terbarukan dalam praktikum fisika di sekolah menengah dengan fokus pada studi kasus yang relevan. Melalui analisis data dan contoh kasus, guru dapat memberikan wawasan tentang bagaimana energi terbarukan tidak hanya mengurangi ketergantungan pada sumber energi fosil, tetapi juga meningkatkan pemahaman siswa tentang konsep-konsep fisika yang mendasar. Penelitian ini merujuk pada berbagai sumber yang mengkaji hubungan antara pendidikan dan penggunaan energi terbarukan, serta bagaimana hal ini dapat diimplementasikan secara efektif di lingkungan sekolah. Metode yang digunakan adalah metode kualitatif dan kuantitatif yang diperoleh dari hasil wawancara dan observasi yang dianalisis menggunakan teknik analisis tematik. Peneliti mengidentifikasi tema-tema utama yang muncul dari data, serta menghubungkannya dengan literatur yang relevan. Dengan pendekatan ini, peneliti dapat menarik kesimpulan mengenai faktor-faktor yang mempengaruhi keberhasilan penerapan energi terbarukan dalam praktikum fisika di sekolah menengah.
Systematic Literature Review: Biomassa Sebagai Sumber Energi Terbarukan Addriani, Ranti; Hamdi, Hamdi; Razi, Pakhrur
Jurnal Pendidikan Tambusai Vol. 8 No. 3 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v8i3.24269

Abstract

Biomassa merupakan salah satu sumber energi terbarukan yang berpotensi besar untuk mengurangi ketergantungan pada bahan bakar fosil dan mengurangi dampak perubahan iklim. Penelitian ini bertujuan untuk mengidentifikasi perkembangan penelitian biomassa di Indonesia yang diperoleh dari jurnal terkait pada tahun 2019 - 2024. Metode yang digunakan dalam penelitian ini adalah metode Systematic Literature Review (SLR). Data diperoleh dengan melakukan pencarian jurnal dengan aplikasi publish or perish ditemukan 200 jurnal yang diperoleh dari database Google Scholar. Kemudian jurnal tersebut disaring berdasarkan jenis artikelnya dan jika jumlah sitasi lebih dari 17 maka diperoleh 10 artikel yang akan direview. Hasil temuan pada artikel ini menunjukkan bahwa terdapat perkembangan penelitian biomassa di Indonesia dan biomassa memiliki potensi besar dalam mendukung transisi energi menuju sumber energi yang lebih ramah lingkungan dan berkelanjutan.
SLOPE OBSERVATION OF THE PADANG SOLOK ROAD AREA BASED ON RADAR DATA Marsa, Indira; Razi, Pakhrur; Akmam; Nishi, Katsunoshin
Georest Vol. 2 No. 1 (2024): Georest
Publisher : EarthCare

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57265/georest.v2i1.21

Abstract

The Padang Solok route topographically has a geological structure that is prone to steep slopes, so it has a high level of disaster risk, one of which is shifting soil and causing landslides. Slope is one of the factors that cause landslides, the purpose of this study is to determine the slope that is prone to landslides. However, slope information needs to be known the slope, and we can know the percentage and degree by mapping using satellite radar SAR (Syntetic Aperture Radar) technology, which is an effective choice for detecting the earth's surface in the Padang-Solok area with SRTM data taken in the area. Processed by observing the slope of the area and then analyzing the landslide area. SAR radar satellite technology allows monitoring of landslide-prone areas with high accuracy, and wide area coverage, operating day and night. This slope is a comparison of height in the form of the vertical distance of a land with its horizontal distance. The amount of slope can be expressed in several units, including percent and degree. Spatial information on slope describes the condition of the land surface, such as a flat, gentle, or steep slope. The Padang-Solok route includes steep slope areas with the highest slope of 7,9 to 40,8 and in percentage 13,80% to 90,10%, classified as steep and steep slope. Areas with steep slopes have a greater potential for landslides than those with moderate slopes, in addition to increasing the amount of surface flow. So the steeper the slope, the greater the velocity of surface flow, and thus the greater the water transport energy.
IoT-based Clothesline Monitoring and Control System Design with Smartphone Display Rena Ramadhani Putri; Pakhrur Razi
Georest Vol. 2 No. 1 (2024): Georest
Publisher : EarthCare

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57265/georest.v2i1.25

Abstract

Indonesia is geographically located on the equator and has two seasons: the rainy season and the dry season. The current global warming has made the weather erratic, making the dry and rainy seasons unpredictable. This is a problem for people who want to dry clothes. To overcome this problem, an automatic control system is needed that can be monitored remotely via Smartphone. This research, with the title Designing an Automatic Clothesline Tool Based on the Internet Of Things, this tool is designed as an automatic control system for clothespins that can be monitored via smartphone remotely, so people don't have to worry about leaving the clothesline. This tool uses NodeMCU Esp32 and uses a rain sensor to detect weather conditions. DC motor is used to move the clothesline in or clothesline out which is controlled by a motor driver. Limit Switch to provide feedback that the clothesline has entered or the clothesline is out.
Vulnerability Liquefaction Mapping in Padang City Based on Cloud Computing Using Optical Satellite Imagery Data Razi, Pakhrur; Putri, Amalia; Sri Sumantyo, Josaphat Tetuko; Akmam, -
JOIV : International Journal on Informatics Visualization Vol 8, No 3-2 (2024): IT for Global Goals: Building a Sustainable Tomorrow
Publisher : Society of Visual Informatics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62527/joiv.8.3-2.3480

Abstract

Liquefaction is a significant geological hazard in earthquake-prone locations like Padang City, Indonesia. The phenomenon happens when saturated soil loses strength owing to seismic shaking, resulting in substantial infrastructure damage. Accurate identification of sensitive locations is critical to catastrophe mitigation. This study aims to map water distribution using optical satellite data and estimate its importance as a crucial element in determining liquefaction vulnerability. The Normalized Difference Water Index (NDWI) was used to assess water and vegetation indexes, taking advantage of its sensitivity to water content in varied land surfaces. We recommended using the NIR (near-infrared) and SWIR (short wave infrared) bands with 832.8 nm and 2202.4 nm, respectively, which are sensitive to soil water content. High-resolution satellite data were used to create NDWI maps, highlighting locations with high water saturation. These findings were combined with geological and seismic data to identify liquefaction-prone zones. The study found that locations with high water content, as measured by NDWI, are highly associated with greater liquefaction susceptibility. The findings highlight the importance of water distribution in determining soil behavior during seismic occurrences. This study highlights the value of NDWI as a low-cost and efficient tool for measuring liquefaction vulnerability at the regional level. The technique offers insights into Padang City's urban planning, catastrophe risk reduction, and community preparedness. By identifying high-risk zones, the study aids in making informed decisions to reduce the impact of future earthquakes. Most of the water content change occurred along the coastal line and in the low-lying areas of Koto Tanggah and North Padang sub-districts. The model can be used in other places with similar geological challenges, providing a scalable solution for liquefaction risk assessment.
Co-Authors A Arifin Abdullah Nur Aziz Abdullah Nur Aziz Addriani, Ranti Adi Suryadi Adree Octova Aisyah Salsabila Dwi Ananda Akmam Akmam Akmam Amali Putra Amalia Putri, Amalia Aminuddin, Jamrud Andika, Heru Anofa Liona Arief Muttaqiin Arifin, A Asrizal Bahri, Aliefa Zunaida Bilalodin Bilalodin Fadila, Husnul Farzand Abdullatif fitri mairizki Gautama, Mohammad Isa Genov Zulmartin Hamdi Hamdi Hamdi Handayani, Sri Gusti Hapsoro, Cahyo A. Harman Amir Hidayati Hidayati Husna, Rahmi Juita Husnul Kausarian Ifdil Ifdil Izumi, Yuta Jamrud Aminuddin Josaphat Tetuko Sri Sumantyo Komaini, Anton Lahara Yanuarsi Marsa, Indira Marzuki Marzuki Mega Oktisa Melnix, Frennadito Muhammad Bohori MUHAMMAD YUSUF Mukhtar Effendi Mukhtar Effendi Mutya Vonnisa Nishi, Katsunoshin Nofi Yendri Sudiar Nofi Yendri Sudiar Nurhayati Nurhayati Nurhayati Nurhayati Putri Aulia R Farzand Abdullatif rahmi juita husna Ramadhan, Ravidho Rena Ramadhani Putri Revielni Sandra Rinadi, Aulia Rozi, Hanifsyah Saputri, Deby Yeriza Silfi sutri Insani Sri Wahyu Hidayati Sunardi Sunardi Sunardi Sunardi Thamrin Thamrin Widia Mai Yetri Widiyani, Agustina Wihantoro Wihantoro Wihantoro Wihantoro Yanfatriani, Elsa Yanuar Kiram Yasmin, Putri Yendri Sudiar, Nofi Yenni Darvina Yohandri Bow Yoszi Mingsi Anaperta Yusefarina Yusefarina Yusnaini, Helmi Zakaria, Jaffri Bin Zulazhari Zulhendra Zulhendra Zulhendri Kamus