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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Journal of Applied Geospatial Information JIPF (Jurnal Ilmu Pendidikan Fisika) JRST (Jurnal Riset Sains dan Teknologi) JURNAL TEKNIK INFORMATIKA DAN SISTEM INFORMASI Jurnal Pendidikan Fisika dan Teknologi Abdimas Galuh : Jurnal Pengabdian Kepada Masyarakat TECHNO-SOCIO EKONOMIKA Community Development Journal: Jurnal Pengabdian Masyarakat ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) Lensa: Jurnal Kependidikan Fisika Jurnal Natural Time in Physics: Journal for Theoretical, Instrumentation, Material-Molecular, and Education Physics
Goldbert Harmuda Duva Sinaga
Universitas HKBP Nommensen
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Coulomb Stress Analysis of the West Coast Sumatra Earthquake on Mount Imun and Mount Helatoba Sinaga, Goldberd Harmuda Duva; Nainggolan, Juliper; Pardede, Hebron
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.v11i1.8102

Abstract

The island of Sumatra is a meeting area between the Indian Ocean plate in the South and the southwest edge of the Sunda Exposure, which is also the continental plate of Southeast Asia or the Eurasian Plate. The meeting of the plates makes the island of Sumatra an area prone to tectonic earthquakes, including Mount Imun and Helatoba which are located in the Tarutung basin. This study uses the Mohr-Coulomb model in the analysis of changes in coulomb stress. This modeling uses data from earthquakes that occurred on the West Coast of Sumatra which was then processed in coulomb 3.4 software. This modeling resulted in stress distribution in Imun and Helatoba. Coulomb stress changes until this time in Imun is 0.323 bar (2024) and coulomb stress change in Helatoba is 0.217 bar. The effect of the increase in coulomb stress (red lobe) originating from the earthquake on the west coast of Sumatra is triggering 2 tectonic earthquakes at the coordinates of Mount Imun in 2022 and triggering a tectonic earthquake at the coordinates of Helatoba in 2018.
Analysis of particle dynamics, event horizon, and thermodynamic properties of black holes in the Ghasemi-Nodehi-Bambi metric SINAGA, GOLDBERD HARMUDA DUVA; SIAGIAN, RUBEN CORNELIUS
Jurnal Natural Volume 25 Number 2, June 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v25i2.43643

Abstract

Black holes, as complex astrophysical objects, are strongly influenced by their metric parameters. This research focuses on the Ghasemi-Nodehi-Bambi (G-N-B) metric, an extension of the Kerr solution, which introduces additional parameters to more accurately describe the properties of black holes. The research investigates the impact of parameter variations in the G-N-B metric on black hole thermodynamics, particle dynamics, and event horizon structure. Analytical and numerical methods are applied to examine the quadratic equations governing event horizons, particle motion, and black hole temperature and entropy. The research explores the variation of parameters (M) and (a) within a certain range to evaluate their influence on the gravitational distribution and the effect of frame attraction. The distribution of (M) values was visualized on a logarithmic scale to highlight the sensitivity of the system to parameter changes. The study found that variations in the G-N-B metric parameter significantly affect the event horizon, with the likelihood of extreme black holes or naked singularities forming depending on the discriminant of the quadratic equation. Particle motion is affected by parameters (M) and (a), which alter the gravitational field and orbital stability. The black hole temperature and entropy show significant changes: an increase in (M) increases gravity and surface temperature, while an increase in (a) decreases temperature due to rotational effects. The research improves the understanding of black holes beyond the Kerr model, especially in terms of black hole thermodynamics and time-space structure.
Pengembangan e-Book Interaktif Fisika Berbasis Kearifan Lokal dengan Pendekatan Pembelajaran Inkuiri Pardede, Hebron; Sitorus, Parlindungan; Sinaga, Goldberd Harmuda Duva
Lensa: Jurnal Kependidikan Fisika Vol. 12 No. 2: December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v12i2.13789

Abstract

Pengintegrasian kearifan lokal dalam pembelajaran fisika merupakan upaya strategis untuk meningkatkan pemahaman konsep sekaligus memperkuat keterampilan berpikir kritis siswa. Penelitian ini bertujuan merancang dan mengembangkan e-book interaktif fisika berbasis kearifan lokal dengan pendekatan pembelajaran inkuiri. Metode penelitian menggunakan pendekatan Research and Development (R&D) dengan model ADDIE (Analyze, Design, Develop, Implement, Evaluate). Instrumen penelitian mencakup angket validasi ahli, tanggapan guru dan siswa, serta tes objektif untuk menilai pemahaman konsep fisika. Hasil validasi menunjukkan media ajar memiliki tingkat kelayakan yang sangat tinggi dari segi konstruk media (86%) dan kesesuaian isi materi (88%). Respon guru dan siswa juga sangat positif dengan capaian masing-masing 86%. Implementasi media ajar pada pembelajaran fisika materi fluida dinamis menunjukkan peningkatan signifikan pada pemahaman konsep siswa, dengan rata-rata nilai pretest sebesar 66 meningkat menjadi 94 pada posttest, serta ketuntasan klasikal mencapai 97,2%. E-book interaktif yang dikembangkan layak digunakan, efektif dalam meningkatkan hasil belajar fisika. Media ini dapat mendukung pembelajaran yang bermakna melalui integrasi konteks budaya lokal dan pendekatan inkuiri.
Co-Authors Adhi Wibowo Ady Frenly Simanullang Agoez Loeqman Agoez Loeqman Analiser Halawa Ariefka, Reza Arip Nurahman Arip Nurahman Aunike Fedora Br Perangin Angin Budiman Nasution Era Novita Sijabat Ezra Octania Sianipar Handoco, Ewin Hebron Pardede Herna Febrianty Sianipar Indah Indah Irving Josafat Alexander Jandri Fan HT Saragi Jaya, Pratama Jono Barita Sianipar Jono Barita Sianipar juliper nainggolan Juliper Nainggolan Limayiana Sihotang Lulut Alfaris Mariana Br Surbakti Martha Rianna Mia Endang Sari Sinaga Mila Susanty Sianipar Morianus Gowasa Muhlis, Dasep nainggolan, juliper Nurahman, Arip Pandu Pribadi Pardede, Hebron Parlindungan Sitorus Pribadi, Pandu Purba, Jhon Sufriadi Purwanto, Romdhon Retno Agung Prasetyo Rina Kristiana Sitepu Rointan Lubis Ronny Napitupulu Ruben Cornelius Siagian Ruben Cornelius Siagian Sahroni, Taufik Roni Sanyosep Rezeki Manalu Siagian, Ruben Cornelius SIANTURI, TAMBOS AUGUST Sinaga, Mardame Pangihutan Siska Yunita Hutagalung SITINJAK, ERNI KUSRINI Toga Simarmata Welmar Olfan Barat, Welmar Olfan