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A Monte Carlo Density Distribution Model Study to Analyze Galaxy Structure, Mass Distribution, and Dark Matter Phenomena Nasution, Budiman; Siagian , Ruben Cornelius; Ritonga, Winsyahputra; Alfaris, Lulut; Muhammad, Aldi Cahya; Nurahman, Arip
Indonesian Review of Physics Vol. 6 No. 1 (2023)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v6i1.8240

This research uses the Monte Carlo density distribution model to study the structure and mass distribution of galaxies and the dark matter phenomenon. Through computer simulations, the research developed a mathematical model with parameters such as rho0, rc, beta, and others, to describe the structure and mass distribution of galaxies. The results show that the model can reproduce various galaxy structures, including groups, clusters and filaments, and influence the behavior and characteristics of individual galaxies. This research provides a deeper understanding of dark matter and its impact on the evolution of the universe. It has implications for improving our understanding of dark matter and the use of Monte Carlo density distribution models to study galaxies. This study provides new insights into the evolution of galaxies and their relationship with dark matter in cosmology. Using both physics and mathematical concepts, this research helps to understand the phenomenon of dark matter and the structure of galaxies, and provides a basis for further research on dark matter and galaxy evolution.

Stories of physics teachers teaching special relativity concepts in senior high school Nurahman, Arip; Kaniawati, Ida; Cahya Prima, Eka; Suhendi, Endi
Research in Physics Education Vol. 3 No. 2 (2024)
Publisher : Insitut Pendidikan Indonesia

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Teaching Special Relativity in senior high school presents significant challenges due to its abstract and counterintuitive concepts, which often contradict students’ everyday experiences. This study employs a narrative research approach to explore the experiences of three physics teachers in teaching Special Relativity. The findings reveal that teachers struggle with explaining relativistic effects such as time dilation, length contraction, and simultaneity, as students frequently hold persistent misconceptions influenced by classical mechanics and popular media. Furthermore, curriculum constraints and the lack of appropriate instructional resources hinder effective teaching. The study identifies key pedagogical strategies, including the use of interactive simulations, thought experiments, and historical contexts, to make relativity more accessible. Teachers emphasize the need for conceptual scaffolding before introducing mathematical derivations to ensure students grasp the fundamental principles. Despite the challenges, teachers express passion and excitement when students experience conceptual breakthroughs, highlighting the transformative power of physics education. This study underscores the importance of professional development programs and curriculum adjustments to better support teachers in delivering relativity concepts effectively. Future research should explore additional instructional interventions to enhance relativity education in high schools.

Exciting science learning in elementary schools with the STREM model: innovative integration for students. Pribadi, Pandu; Jamali, Arif; Nurahman, Arip; Jufriansah, Adi; Kartika , Ika
Research in Physics Education Vol. 3 No. 2 (2024)
Publisher : Insitut Pendidikan Indonesia

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Science learning in elementary schools often faces challenges in student engagement and conventional teaching methods. The STREM model offers an interdisciplinary approach that not only improves science understanding but also integrates Islamic values. Therefore, this study aims to analyse the effectiveness of applying the STREM model in improving students' understanding and engagement in science learning at one private elementary school in the West Java province. This study used the Kemmis and McTaggart CAR model with 2-3 cycles, consisting of the stages of planning, implementation, observation, and reflection. Data were collected through observation, interviews, learning outcome tests (pre-test and post-test), and student response questionnaires, then analysed descriptively quantitatively and qualitatively. The results showed that the application of the STREM model improved student learning outcomes, with the average score increasing from 68 to 87, and a decrease in students in the "Needs Guidance" category from 45% to 10%. In addition, students' involvement in exploration increased from 55% to 92%, indicating that project-based learning and experimentation in the STREM model can increase students' interest and understanding of science. Thus, the STREM model proved effective in improving students' understanding of science, strengthening the integration between science and Islamic values, and increasing engagement in scientific exploration. However, teacher adaptation to exploratory methods and project time management are challenges that need to be refined. Therefore, additional training for teachers and flexibility in managing learning time are needed to optimize the implementation of the STREM model.

Applying Problem-Based Learning in Thermodynamics to Enhance Comprehension of Physics Concepts and Argumentation Skills Sari, Lasmita; Adimayuda, Rizal; Gumilar, Surya; Nurahman, Arip; Ashel, Hazrati
Tadris: Jurnal Keguruan dan Ilmu Tarbiyah Vol 8 No 1 (2023): Tadris: Jurnal Keguruan dan Ilmu Tarbiyah
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/tadris.v8i1.14607

To effectively teach the complex concept of thermodynamics, appropriate and innovative teaching methods are needed to ensure a correct and in-depth understanding. This study aims to evaluate the application of the Problem-Based Learning (PBL) model in teaching thermodynamics to enhance students' comprehension of concepts and argumentation skills. The research utilized a quasi-experimental design with a pretest-posttest non-equivalent control group. Of the 50 participants, two distinct groups were formed through purposive sampling. A total of 27 participants underwent PBL instruction, while the remaining 23 participants received conventional learning instructions. The results revealed that students who were taught thermodynamics using the PBL model exhibited significant improvement in both conceptual understanding and argumentation skills compared to the control group. These participants displayed high engagement in tackling thermodynamic problems. PBL taught them how to argue comprehensively, emphasizing the cultivation of 'how to think' rather than just 'what to think' in addressing thermodynamic challenges. Based on these findings, this study recommends that physics educators consider incorporating PBL as a teaching strategy to bolster students' conceptual understanding and argumentation skills in thermodynamics.

The Influence of PhET-Assisted STEM Learning Model on Understanding the Concept of Motion Transformation in Physics Pribadi, Pandu; Jamali, Arif; Nurahman, Arip; Anwar, Khairil; Fiqry, Rizalul
Bincang Sains dan Teknologi Vol. 4 No. 02 (2025): Bincang Sains dan Teknologi
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/bst.v4i02.1118

This study aims to analyze the effect of the PhET-assisted STEM learning model on the understanding of motion transformation concepts among students at Muhammadiyah Langkaplancar Junior High School. The concept of motion transformation includes translation, rotation, and acceleration, which are abstract and often difficult for students to understand. To overcome this, PhET is used as an interactive simulation medium that allows students to manipulate variables directly and observe their effects in real time. The research method uses an experimental design with pre-tests and post-tests. The research sample consisted of 20 ninth-grade students selected at random. The research instruments were concept comprehension tests, observations, and student learning experience questionnaires. The results showed an increase in the average comprehension score of 20 points in the experimental group, while the control group only increased by 4 points. Although the ANOVA test did not show a statistically significant difference between the two groups (p-value 0.95), PhET-assisted learning was proven to increase interactivity and the quality of physics learning. In conclusion, the application of the PhET-assisted STEM learning model can be an alternative innovative strategy to strengthen the understanding of complex physics concepts at the junior high school level, while encouraging student motivation and engagement in the learning process.

Separation of Variables Method in Solving Partial Differential Equations and Investigating the Relationship between Gravitational Field Tensor and Energy-Momentum Tensor in Einstein's Theory of Gravity Siagian, Ruben Cornelius; Alfaris, Lulut; Nurahman, Arip; Muhammad, Aldi Cahya; Nyuswantoro, Ukta Indra; Nasution, Budiman
Kappa Journal Vol 7 No 2 (2023): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i2.20921

This research delves into the study of partial differential equations (PDEs) and gravitational fields in spacetime. It focuses on solving PDEs using the Separation of Variables method and explores the relationship between the gravitational field tensor and the energy-momentum tensor, leading to the final equation for the gravitational field tensor. The research also investigates Einstein's theory of gravity and the energy-momentum tensor integral, providing the general solution for the gravitational potential and its implications. Additionally, the mean integration of the gravitational wave tensor is analyzed, yielding an expression for the tensor strain of gravitational waves over an infinitely long period. The components of the gravitational wave tensor and their effect on gravitational sources are examined. Furthermore, the propagation of electromagnetic fields in spacetime is studied using the Retarded Green's Function. The primary objectives of this research are to understand and explore mathematical techniques for solving PDEs and analyzing gravitational fields and their interactions in spacetime. The integration of multiple theoretical concepts related to PDEs, gravitational fields, and electromagnetic fields enhances our understanding of fundamental physics principles. This contributes to the advancement of theoretical physics and opens avenues for potential practical applications, such as gravitational wave detection and electromagnetic field propagation in complex media. In conclusion, this research provides valuable insights into fundamental physics principles and fosters a deeper understanding of their interconnections and implications

PENGARUH NAUNGAN TERHADAP PERTUMBUHAN DAN HASIL TIGA VARIETAS CABAI MERAH (Capsicum annuum L.). Ramayana, Abdul Syamad; Supriyanto, Bambang; Pranoto, Hadi; Susylowati, Susylowati; Nurahman, Arip
Agrifor : Jurnal Ilmu Pertanian dan Kehutanan Vol 23, No 1 (2024): Maret 2024
Publisher : Universitas 17 Agustus 1945 Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31293/agrifor.v23i1.7246

Tujuan penelitian adalah untuk mengetahui interaksi naungan terhadap pertumbuhan dan hasil tiga varietas cabai merah, mengetahui naungan yang dapat memberikan pertumbuhan dan hasil varietas cabe merah terbaik, dan mengetahui varietas cabe merah yang memberikan pertumbuhan dan hasil terbaik.Penelitian telah dilaksanakan dari bulan Juni sampai Oktober 2019 di Jl Sambaliung, Universitas Mulawarman Samarinda Kalimantan Timur.Penelitian ini disusun dalam Rancangan Petak Terbagi/Split Plot Design 3x5 yang diulang sebanyak 5 kali. Sebagai petak utama adalah perlakuan naungan (N) yang terdiri dari 3 taraf yaitu, 0%, 25 %, dan 50 %, serta sebagai anak petak adalah perlakuan varietas (V) yang terdiri dari 3 taraf yaitu, Darmais F1, Astina F1 dan Tanaka F1. Data yang diperoleh dianalisis dengan menggunakan sidik ragam. Apabila terdapat pengaruh nyata maka untuk membandingkan antara rata-rata dua pelakuan dilanjutkan dengan uji BNT 5 %.Hasil analisis sidik ragam menunjukkan bahwa tidak terdapat interaksi antara perlakuan naungan dan varietas cabai merah, perlakuan naungan berpengaruh tidak nyata terhadap semua variabel pengamatan, begitu juga dengan perlakuan varietas berpengaruh tidak nyata terhadap semua variabel pengamatan.

Antibacterial-enhanced Synthetic Stainless Steel, Hydroxyapatite, and Polylactic Acid in Bioactive Screw Systems for Safe Bone Healing Prima, Eka Cahya; Melati, Putri Sekar; Arifah, Fina Nurul; Septiyanto, Arifin; Nurahman, Arip; Budiatin, Aniek Setiya; Herdianto, Nendar
Islamic Research Vol 8 No 2 (2025): Islamic Research
Publisher : Perhimpunan Intelektual Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47076/jkpis.v8i2.368

Bone fractures are rising worldwide due to aging populations and increased trauma, creating demand for implants that overcome infection, delayed healing, and poor osteointegration. Multifunctional biomaterials, especially PLA–HA Bioxcrew systems, offer integrated mechanical support with antibacterial, anti-inflammatory, and osteogenic functions while remaining biocompatible. Implant-associated infections driven by Staphylococcus aureus and Gram-negative bacteria persist because of biofilm formation and chronic inflammation. Bioxcrew advancements address these barriers through metal-ion doping, nanoscale surface engineering, and incorporation of antimicrobial agents into biodegradable polymer matrices, enabling controlled ion release, immune modulation, stem-cell recruitment, and improved bone regeneration. Stainless steel provides strength, hydroxyapatite enhances biological integration, and PLA enables safe degradation and localized drug delivery, making their hybridization ideal for next-generation implants. Using a narrative–integrative review of peer-reviewed literature from 2018 to 2025, this study synthesizes trends in antibacterial strategies and regenerative performance. Findings show that hybrid Bioxcrew platforms significantly reduce infection risk and enhance functional bone healing.

Antibacterial-enhanced Synthetic Stainless Steel, Hydroxyapatite, and Polylactic Acid in Bioactive Screw Systems for Safe Bone Healing Prima, Eka Cahya; Melati, Putri Sekar; Arifah, Fina Nurul; Septiyanto, Arifin; Nurahman, Arip; Budiatin, Aniek Setiya; Herdianto, Nendar
Islamic Research Vol 8 No 2 (2025): Islamic Research
Publisher : Perhimpunan Intelektual Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47076/jkpis.v8i2.368

Bone fractures are rising worldwide due to aging populations and increased trauma, creating demand for implants that overcome infection, delayed healing, and poor osteointegration. Multifunctional biomaterials, especially PLA–HA Bioxcrew systems, offer integrated mechanical support with antibacterial, anti-inflammatory, and osteogenic functions while remaining biocompatible. Implant-associated infections driven by Staphylococcus aureus and Gram-negative bacteria persist because of biofilm formation and chronic inflammation. Bioxcrew advancements address these barriers through metal-ion doping, nanoscale surface engineering, and incorporation of antimicrobial agents into biodegradable polymer matrices, enabling controlled ion release, immune modulation, stem-cell recruitment, and improved bone regeneration. Stainless steel provides strength, hydroxyapatite enhances biological integration, and PLA enables safe degradation and localized drug delivery, making their hybridization ideal for next-generation implants. Using a narrative–integrative review of peer-reviewed literature from 2018 to 2025, this study synthesizes trends in antibacterial strategies and regenerative performance. Findings show that hybrid Bioxcrew platforms significantly reduce infection risk and enhance functional bone healing.

Pengaruh Metode STEM Terintegrasi pada Materi Elektronika terhadap Kemampuan Analisis dan Pemecahan Masalah Siswa SMK Pribadi, Pandu; Nurahman, Arip; Jufriansah, Adi
Jurnal Simki Pedagogia Vol 7 No 2 (2024): Volume 7 Nomor 2 Tahun 2024
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jsp.v7i2.805

This study evaluates the effect of the integrated STEM method in learning electronics material on the analytical and problem-solving abilities of vocational high school students. The method used is Classroom Action Research (CAR) involving class XI students of Industrial Electronics Engineering at SMK Negeri 2 Banjar. This study involved three cycles of action including planning, action, observation, and reflection. The results showed a significant increase in students' analytical and problem-solving abilities, indicated by an increase in the average score from 60.0 in the pre-test to 80.0 in the post-test in the third cycle. Observations also showed an increase in student participation, with 95% of students actively involved in learning in the last cycle. These results indicate the effectiveness of the STEM method in improving students' competence in the field of electronics as well as their readiness to face the challenges of the world of work or further education.

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