Jurnal Kumparan Fisika https://ejournal.unib.ac.id/kumparan_fisika <p>Jurnal Kumparan Fisika is an open access and double blind peer-reviewed journal that contains articles on the results of research on teaching physics, learning physics, physics theory, and applied physics. Jurnal Kumparan Fisika is managed by the Physics Education Study Program of the Teaching and Education Faculty of Universitas Bengkulu. Jurnal Kumparan Fisika is published in April, August and December a year by Unib Press. Jurnal Kumparan Fisika received e-ISSN <a href="https://issn.lipi.go.id/terbit/detail/1515598548">2655-1403</a> in 2018 and p-ISSN <a href="https://issn.lipi.go.id/terbit/detail/1560827953">2685-1806</a> in 2019. Jurnal Kumparan Fisika has been indexed in DOAJ since 2019 and accredited as SINTA 4 on April 2020 and as <strong>SINTA 3</strong> on April 2022.</p> en-US <p>Authors who publish in this journal agree with the following terms:</p><ol type="a"><li>Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a <a href="https://creativecommons.org/licenses/by/3.0/" target="_new">Creative Commons Attribution License</a> that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</li><li>Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</li><li>Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See <a href="http://opcit.eprints.org/oacitation-biblio.html" target="_new">The Effect of Open Access</a>).</li><li>This work is licensed under a <a href="http://creativecommons.org/licenses/by-sa/4.0/" rel="license">Creative Commons Attribution-ShareAlike 4.0 International License</a>.</li></ol><p>• Creative Commons Attribution-ShareAlike (CC BY-SA)</p><p><a href="http://creativecommons.org/licenses/by-sa/4.0/" rel="license"><img src="https://i.creativecommons.org/l/by-sa/4.0/88x31.png" alt="Creative Commons License" /></a></p><p><span>Jurnal Kumparan Fisika is licensed under a <a href="http://creativecommons.org/licenses/by-sa/4.0/" rel="license">Creative Commons Attribution-ShareAlike 4.0 International License</a>.</span></p> aprina.defianti@unib.ac.id (Aprina Defianti) azharlubis@unib.ac.id (Azhar Aziz Lubis) Sun, 31 Aug 2025 00:00:00 +0000 OJS 3.3.0.11 http://blogs.law.harvard.edu/tech/rss 60 PENDEKATAN NUMERIK TERHADAP DINAMIKA TRANSPOR ION Ca²⁺ DAN K⁺ DALAM SISTEM SARAF AKSON BERBASIS MODEL MORRIS-LECAR DENGAN METODE ODE45 https://ejournal.unib.ac.id/kumparan_fisika/article/view/43327 <p><strong>A</strong><strong>B</strong><strong>S</strong><strong>T</strong><strong>R</strong><strong>A</strong><strong>K</strong></p> <p> </p> <p>Pemodelan transpor ion dalam sistem saraf sangat penting untuk memahami mekanisme potensial aksi dan dinamika membran sel. Penelitian ini menyajikan simulasi dinamika potensial membran akson berdasarkan model Morris-Lecar, yang merepresentasikan aktivitas neuron dengan memasukkan kontribusi utama dari ion K⁺ (Kalium) dan Ca²⁺ (Kalsium). Simulasi dilakukan menggunakan metode numerik ODE45 pada platform Matlab. Model ini mencakup dua variabel utama: potensial membran dan variabel saluran ion (K⁺ dan Ca²⁺), yang diturunkan dari sistem persamaan diferensial. Hasil simulasi menunjukkan bahwa model Morris-Lecar secara efektif merepresentasikan osilasi dan ambang eksitabilitas neuron dalam menanggapi stimulus arus. Pengaruh dominan ion Ca²⁺ terhadap proses depolarisasi serta peran ion K⁺ dalam repolarisasi juga ditunjukkan secara kuantitatif. Dengan pendekatan ini, metode ODE45 terbukti stabil dan efisien dalam menangani dinamika neuron yang kompleks. Studi ini memberikan dasar yang kuat untuk analisis lebih lanjut dalam neurofisiologi komputasional dan pemodelan biologi seluler.</p> <p> </p> <p>Kata kunci : Transpor Ion, Model Morris-Lecar, Metode ODE45.</p> <p> </p> <p><strong>ABS</strong><strong>T</strong><strong>R</strong><strong>A</strong><strong>C</strong><strong>T</strong></p> <p> </p> <p>Modeling ion transport in the nervous system is essential to understanding the mechanisms of action potentials and cell membrane dynamics. This study presents simulations of axon membrane potential dynamics based on the Morris-Lecar model, which uses K⁺ (potassium) and Ca²⁺ (calcium) ions to represent neuronal activity. The simulations were performed using the ODE45 numerical method on the MATLAB platform. The model comprises two primary variables: the membrane potential and the ion channel variables (K⁺ and Ca²⁺), which are derived from a system of differential equations. The simulation results demonstrate that the Morris-Lecar model accurately represents neuronal oscillation and excitability thresholds in response to a current stimulus. The simulations also quantitatively demonstrated the dominant influence of Ca²⁺ ions on depolarization and the role of K⁺ ions in repolarization. This approach proved the ODE45 method to be stable and efficient in handling complex neuronal dynamics. This study provides a solid foundation for further computational neurophysiology and cellular biology modeling analysis.</p> <p> </p> <p>Keyword: Ion transport, Morris-Lecar model, ODE45 method.</p> Netriani Veminsyah Ahda, Tiara Hardyanti Utama Copyright (c) 2025 Netriani Veminsyah Ahda, Tiara Hardyanti Utama https://creativecommons.org/licenses/by-sa/4.0 https://ejournal.unib.ac.id/kumparan_fisika/article/view/43327 Sun, 31 Aug 2025 00:00:00 +0000