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All Journal JOURNAL ONLINE OF PHYSICS Jurnal Penelitian Pendidikan IPA (JPPIPA) JURNAL PENDIDIKAN TAMBUSAI Journal on Education Eksakta : Berkala Ilmiah Bidang MIPA Kappa Journal Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Journal of Climate Change Society Journal of Hypermedia & Technology-Enhanced Learning Konsienti: Community Services Journal Journal of Experimental and Applied Physics BULETIN FISIKA
Zulhendra Zulhendra
Universitas Negeri Padang
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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Proses Pembuatan Kerajinan Tradisional dan Abon Ikan Khas Mentawai: Tinjauan Literatur tentang Nilai Budaya dan Ekonomi Faras Dian Saputri; Sahfia Varanika Ain; Putry Hadifa; Dinda Adriena; Salsa Bila Salwa; Zulhendra Zulhendra
Jurnal Pendidikan Tambusai Vol. 9 No. 3 (2025): Desember
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

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Abstract

Penelitian ini bertujuan untuk menganalisis proses pembuatan kerajinan tradisional dan produk pangan lokal khas Mentawai, khususnya kalung tradisional dan abon ikan, sebagai upaya pelestarian nilai budaya sekaligus pengembangan ekonomi berbasis masyarakat. Melalui pendekatan kualitatif dan observasi langsung selama kegiatan Kuliah Kerja Nyata (KKN) di Desa Matobe, proses produksi kedua produk tersebut diuraikan secara sistematis. Pembuatan kalung khas Mentawai melibatkan pemilihan manik-manik, perancangan pola, serta perakitan menggunakan benang dan lem, yang mencerminkan identitas budaya lokal. Sementara itu, produksi abon ikan dimulai dari pembersihan ikan, pengukusan, penyuiran, pencampuran bumbu tradisional, hingga penggorengan hingga kering. Kedua proses ini tidak hanya bernilai ekonomi tinggi sebagai komoditas UMKM, tetapi juga berperan dalam pemanfaatan potensi lokal secara berkelanjutan. Partisipasi aktif masyarakat, didukung oleh pelatihan dan promosi melalui media sosial, turut meningkatkan daya saing produk di pasar modern. Temuan menunjukkan bahwa integrasi nilai budaya dengan inovasi teknis dan pemasaran digital mampu mendorong pemberdayaan ekonomi lokal. Dengan demikian, pengembangan produk tradisional seperti kalung Mentawai dan abon ikan berpotensi menjadi model pengembangan desa yang berkelanjutan.
Effect of Declination and Solar Radiation Intensity on Weather Parameters in 2020-2023 in Padang City Juliana Dekriani; Letmi Dwiridal; Harman Amir; Zulhendra Zulhendra
BULETIN FISIKA Vol. 26 No. 1 (2025): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2025.v26.i01.p04

Abstract

Padang City is an area that often has an extreme climate so that it is at risk of potential natural disasters that are difficult to predict. This study aims to determine the effect of declination and solar radiation intensity on weather parameters that occur in Padang City in 2020- 2023. The data used are solar declination data, solar radiation intensity and weather parameter data (rainfall intensity, air temperature and air humidity). The research conducted is quantitative research using secondary data obtained from the Class II Minangkabau Meteorological Station Padang Pariaman. Modeling is done using a surfer to get the contours of declination, solar radiation intensity and weather parameters. The result obtained are obtained are that solar declination reaches a peak point on June 21 with 23.44o LU and on December 21 with 23.44o LS. The higher the solar declination North Latitude Direction the Intensity of solar radiation and air temperature that occurs is higher but not in the solar declination of south latitude direction. The higher the intensity of solar radiation, the lower air humidity and rainfall intensity. December 30, 2022 solar declination is 23.13o LS, solar radiation intensity is 96.62 J/m2s2, air temperature is, temperature 24 o C, air humidity is 89% and rainfall intensity is 46.5 mm. While on June 24, 2021 the declination of the sun is 23.4o LU, the intensity of solar radiation is 155.11 J/m2s2, the air temperature is 27.3o C, the air humidity is 77% and the rainfall is 0 mm.
Implementation of the Gauss-Kronrod Quadrature Method (G7, K15) on 2D Gravity Anomaly Modeling in Basins with a Polynomial Variation of Density Distribution with Depth Zulhendra; Wahyu Srigutomo; Cahyo Aji Hapsoro
Jurnal Penelitian Pendidikan IPA Vol 10 No 8 (2024): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i8.8493

Abstract

Forward modeling of 2D gravity anomalies, considering density contrasts that vary polynomially with depth, was performed to examine basin structures. This process involved two main stages: deriving analytical formulas and executing numerical integration. The Gauss-Kronrod Quadrature Method, utilizing 7 Gauss points and 15 Kronrod points, was employed to precisely compute these integrals. Initial modeling applied to theoretical basement scenarios with fixed density contrasts showed gravity anomalies that accurately reflected the curvature of the basement. To validate the approach, it was then applied to real-world cases including the Sebastian Vizcaino Basin, San Jacinto Graben, and Sayula Basin. By incorporating suitable density contrasts, modeling lengths, and basement curvature shapes, the results revealed that both fixed-density and depth-variable density models produced gravity anomalies with patterns consistent with the actual basement curvature. These findings validate the modeling technique’s effectiveness in representing real geological features accurately. The study confirms that the Gauss-Kronrod Quadrature Method (G7, K15) is robust for analyzing 2D gravity anomalies, providing a reliable tool for understanding the influence of varying density contrasts on gravity responses.
Identifikasi Struktur Bawah Permukaan di Wilayah Kabupaten Bojonegoro Jawa Timur Menggunakan Metode Geomagnetik melalui Pemodelan Inversi Putri Priandini; Harman Amir; Letmi Dwiridal; Zulhendra Zulhendra
Jurnal Pendidikan Tambusai Vol. 10 No. 2 (2026): Agustus
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v10i2.39385

Abstract

Kabupaten Bojonegoro terletak pada Zona Kendeng yang dikenal memiliki kompleksitas struktur geologi yang tinggi, sehingga diperlukan pendekatan geofisika untuk mengkaji kondisi bawah permukaannya. Dalam penelitian ini digunakan metode geomagnetik dengan memanfaatkan data satelit EMAG2 untuk mengidentifikasi struktur bawah permukaan melalui pemodelan inversi 3D. Tahapan pengolahan data meliputi pembuatan peta Total Magnetic Intensity (TMI), proses reduksi ke kutub (RTP), pemisahan anomali menjadi regional dan residual, serta analisis distribusi suseptibilitas batuan. Hasil penelitian memperlihatkan adanya variasi anomali magnetik yang cukup signifikan, di mana anomali tinggi terkonsentrasi di bagian utara dan selatan yang mengindikasikan keberadaan batuan bermagnet kuat atau tinggian struktur, sedangkan anomali rendah dominan di bagian tengah yang mencerminkan zona cekungan sedimen. Anomali regional merepresentasikan kondisi struktur pada kedalaman, sementara anomali residual memberikan gambaran lebih rinci terkait struktur dangkal seperti sesar dan perubahan litologi. Secara umum, hasil ini menunjukkan bahwa struktur bawah permukaan Bojonegoro dikendalikan oleh sistem tektonik regional berarah barat–timur dengan variasi litologi yang cukup kompleks.
Digitizing Web-Based Village Profiles as a Means of Historical Preservation and Promoting Local Potential in Matobe Village, Mentawai Arda Decs’ta Heri Putri; May Sandra Putri; Intan SepriYelmi; Muhammad Gians Abdul Ghani; Fajar Anugrah; Zulhendra
Konsienti : Community Services Journal Vol. 4 No. 1 (2026): Konsienti: Community Services Journal
Publisher : PT. TAKAZA INNOVATIX LABS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61536/konsienti.v4i1.403

Abstract

The development of village digitalization policies in Indonesia has not been fully followed by the availability of official information media at the village level, including in Matobe Village, which has a rich history, MSMEs, tourism potential, and tsunami vulnerability. This research/community service aims to develop a Matobe Village profile website as a means of preserving local history, promoting economic and tourism potential, and disaster education. The study uses a descriptive qualitative approach in the form of community-based research development. The population includes village government, community leaders, MSME actors, tourism managers, and residents in coastal areas; the sample was selected purposively, focusing on key informants who understand history, MSMEs, tourism, and disaster risk. The main instruments were researchers and a team of students, supported by interview guidelines, observation sheets, visual documentation, and GPS. Data were collected through observation, in-depth interviews, documentation, and participatory mapping; analysis was conducted thematically with triangulation of sources and methods. The results of the study show the realization of the desamatobe.site website that contains documented local history, a MSME directory, tourism information on the Nipah Forest and Mabola Waterfall, as well as a digital map of tsunami-prone areas and zones. In conclusion, the village profile website plays a strategic role as a medium for historical preservation, promoting local potential, increasing information transparency, and strengthening the digital literacy capacity and disaster preparedness of village communities.
Analysis of Heavy Rainfall Using Radar Image Data, Satellite Images, and Rainfall Stations in the City of Padang Ferdi Agusrianto; Nofi Yendri Sudiar; Harman Amir; Zulhendra
Journal of Climate Change Society Vol. 4 No. 1 (2026)
Publisher : Universitas Negeri Padang

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Abstract

Padang City, as the capital of West Sumatra Province, often experiences heavy rains that can cause flooding and landslides. This phenomenon of heavy rainfall is a matter of serious concern due to its impact on the lives of the community, infrastructure, and the regional economy. On March 7, 2024, heavy rainfall occurred in Padang City, triggering flooding and causing loss of life and property. The analysis was conducted using weather radar imagery, satellite imagery, and rainfall observation data from several rain gauges in Padang City. To obtain representative rainfall data with broad spatial coverage, the use of remote sensing data such as weather radar images and satellite images is vital, especially for areas with a limited number of rain stations or difficult-to-reach topography. Therefore, this study aims to analyze the comparison of rainfall data based on radar imagery, satellite imagery, and rain gauge data to understand the advantages and limitations of each instrument. The combination of these three data sources is very important to improve the accuracy of rainfall monitoring. The research method used in this study is quantitative research using data from the BMKG. The results of the analysis obtained from the error and correlation, both from radar data and satellite imagery, generally show a tendency to underestimate the rainfall observed at rain gauges in Padang City, as indicated by the Mean Error (ME) value, which is predominantly negative at almost all rain gauges.
Estimation of Earthquake Intensity and Peak Ground Acceleration in West Java Using the MC Guire and the Lin & Lee Method Resi Silvianis; Syafriani; Letmi Dwiridal; Zulhendra
Kappa Journal Vol 8 No 3 (2024): Kappa Journal
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i3.28095

Abstract

Abstract:  West Java province was in a subduction zone and fault zone (slip fault), which caused earthquakes. Therefore, it was necessary to research estimates of maximum ground acceleration in West Java to mitigate earthquake disasters. This research also aimed to determine the value of ground acceleration and earthquake intensity and to determine the distribution map using the McGuire method and the Lin & Lee method. The data used were earthquake data for 1950-2023 with a magnitude > 5 SR. From processing this data, the maximum ground acceleration value in West Java ranged between 10.14722-195.3540 gal, and the maximum intensity value was IV-VI MMI using the Mc Guire method. Meanwhile, for the Lin & Lee method, it ranged between 6.6512 to 49.24599 gal. Of the two methods, the largest maximum ground acceleration value was located in Cianjur Regency, which was due to its proximity to the Cimandiri fault and the geological conditions in the area.
Seismic Vulnerability Index Microzonation In Nagari Tanjung Alai, X Koto Singkarak Sub- District, Solok District Using Hvsr Method Habib Muzafi; Akmam Akmam; Nofi Sudiar; Zulhendra Zulhendra
Journal of Experimental and Applied Physics Vol 4 No 2 (2026): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v4i2.126

Abstract

Nagari Tanjung Alai is located on the fault of the Indo- Australian plate and the Eurasian plate which causes this area to become an earthquake-prone area. An earthquake occurs when the earth trembles or shifts abruptly as a result of tectonic plate movement, causing the rock strata on the earth's surface to shift. Earthquakes in the Nagari Tanjung Alai area can face serious problems, especially earthquakes can threaten public safety, earthquakes can cause damage to infrastructure such as houses and roads, worse earthquakes can trigger the movement of land masses which results in other disasters such as landslides and liquefaction. One method that can be used to identify earthquake- prone areas is the HVSR (Horizontal Vertical Spectral Ratio) method. One technique for analyzing microtremor data is the HVSR approach, which compares the vertical and horizontal components of the microtremor signal. The purpose of this research is to identify and map the microzonation of dominant frequency, amplification factor, and seismic vulnerability index in Nagari Tanjung Alai, X Koto Singkarak District, Solok Regency based on microtremor data processed using the HVSR method. This research is expected to contribute significantly to the understanding of earthquake disaster risk in the area. The HVSR technique of analysis reveals that the major frequency value falls between 0.5 Hz - 8.5 Hz, the amplification value ranges from 1.54 - 7.322, and The value of the seismic vulnerability index falls between 0.63312 to 107.223. Therefore, Nagari Tanjung Alai can be classified as having a high seismic vulnerability index.
Karakterisasi Struktur Segmen Menggunakan Analisis Gayaberat Terintegrasi First Horizontal Derivative (FHD) dan Second Vertical Derivative (SVD) Muthiatulfitri Muthiatulfitri; Zulhendra Zulhendra; Ahmad Fauzi; Harman Amir
Jurnal Pendidikan Tambusai Vol. 10 No. 2 (2026): Agustus
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v10i2.41077

Abstract

Segmen Siulak merupakan bagian dari Sistem Sesar Sumatera yang berada di Kabupaten Kerinci, Provinsi Jambi. Penelitian kuantitatif deskriptif ini bertujuan untuk menganalisis kelurusan struktural dan mekanisme pergerakan dominan pada Segmen Siulak. Penelitian ini menggunakan populasi sampel sebanyak 30.340 titik data anomali gravitasi sekunder dari Global Gravity Model Plus (GGMPlus) dengan kerapatan grid 200 meter yang mencakup seluruh zona sesar tersebut. Pengolahan data dilakukan melalui perhitungan Complete Bouguer Anomaly (CBA), pemisahan anomali regional dan residual, serta analisis First Horizontal Derivative (FHD) Dan Second Vertical Derivative (SVD). Hasil CBA menunjukkan kontras anomali yang mengindikasikan perbedaan densitas batuan dan jalur sesar utama. Interpretasi FHD dan SVD menguatkan keberadaan struktur sesar dengan pola dominan sesar normal dan sesar naik. Hasil penelitian ini memberikan informasi komprehensif mengenai karakteristik sesar bawah permukaan yang dapat dimanfaatkan secara konkret untuk pemodelan geologi struktur serta rekonstruksi geometri patahan bawah permukaan.
Identifikasi Struktur Bawah Permukaan Gunung Api Aktif Menggunakan Data Gravitasi GGMPlus dan Pemodelan 2D Ririn Andini; Zulhendra Zulhendra; Ahmad Fauzi; Letmi Dwiridal
Jurnal Pendidikan Tambusai Vol. 10 No. 2 (2026): Agustus
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v10i2.41135

Abstract

Gunung api aktif dengan aktivitas vulkanik yang tinggi memerlukan pemahaman yang baik mengenai struktur bawah permukaannya untuk mendukung kajian vulkanologi dan mitigasi bencana. Penelitian ini bertujuan untuk menganalisis pola sebaran Complete Bouguer Anomaly (CBA) dan mengidentifikasi struktur bawah permukaan Gunung Marapi menggunakan data gravitasi satelit GGMPlus dan ERTM2160 pada wilayah koordinat 100°20'59.67"BT - 100°35'52.07"BT dan 0°30'0.34"LS - 0°15'15.72"LS. Pengolahan data dilakukan melalui estimasi densitas menggunakan metode Parasnis, perhitungan Complete Bouguer Anomaly (CBA), analisis spektrum, pemisahan anomali regional dan residual menggunakan Upward Continuation, serta pemodelan 2D. Hasil penelitian menunjukkan variasi densitas batuan bawah permukaan berkisar antara 2,4-2,9 g/cm3. Zona berdensitas tinggi yang terletak di bawah pusat Gunung Marapi diinterpretasikan sebagai reservoir magma atau intrusi magmatik yang terhubung dengan kawah melalui jalur migrasi magma. Hasil penelitian ini menunjukkan keberadaan sistem magmatik yang masih aktif di bawah Gunung Marapi dan memberikan informasi penting untuk memahami dinamika vulkanik serta mendukung upaya mitigasi bahaya erupsi di masa mendatang.
Co-Authors AA Sudharmawan, AA Ahmad Fauzi Ahmaddul Hadi, Ahmaddul Akmam Akmam Althaf, Muhammad Mahdy Aprimanda Mulya Rizki, Rifa Arda Decs’ta Heri Putri Bahri, Aliefa Zunaida Bayu Pratama Debi Rianto Denandra, Alza Dinda Adriena Fadila, Husnul Fajar Anugrah Fandi Oktasendra Faras Dian Saputri Fauzi Ahmad Muda Ferdi Agusrianto Florentina Simalango, Nora Habib Muzafi Hamdi Hamdi Handayani, Silvia Sri Hapsoro, Cahyo Aji Harman Amir Harman Amir Harman Amir Intan Purnama Yani Intan SepriYelmi Janna, Anisa Juliana Dekriani Khairunnissa, Shafira Lativa Mursyida Letmi Dwiridal Letmi Dwiridal Letmi Dwiridal Letmi Dwiridal Mairizwan Mairizwan May Sandra Putri Muhammad Gians Abdul Ghani Muthiatulfitri Muthiatulfitri Nofi Sudiar Nofi Yendri Sudiar Nofi Yendri Sudiar Pakhrur Razi Putri Priandini Putry Hadifa Rahmadhani, Annisa Resi Silvianis Rio Anshari Ririn Andini Riyasni, Selma Sahfia Varanika Ain Salsa Bila Salwa Salsabila, Salsabila Saqilah, Alya Syafriani Syafriani Syafriani Syafriani Syafriani, Syafriani Wahyu Srigutomo Widia Kemala Sari Yendri Sudiar, Nofi Zatil Ismah, Amirah Zikri, Ahmad Raihan zu, Zurahma