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All Journal BAREKENG: Jurnal Ilmu Matematika dan Terapan Engagement: Jurnal Pengabdian Kepada Masyarakat
Megahnia Prihandini, Rafiantika
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Religion Arts Humanities Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Mathematics Mechanical Engineering Physics Social Sciences Transportation

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Elevating Teachers’ Competence through the Development of Instructional Media Oriented to Problem-solving Skills with the Aid of Articulate Storyline Megahnia Prihandini, Rafiantika; Setiawani, Susi; Feri Widyawati, Yuli
Engagement: Jurnal Pengabdian Kepada Masyarakat Vol 8 No 2 (2024): November 2024
Publisher : Asosiasi Dosen Pengembang Masyarajat (ADPEMAS) Forum Komunikasi Dosen Peneliti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29062/engagement.v8i2.1533

Abstract

With rapid technological advancement, integrating technology into education becomes increasingly important. It is thus imperative for teachers to master satisfactory competence in improving students' problem-solving skills. Fundamentally a community service, this study aims to increase teacher competence in developing instructional media oriented to problem-solving skills assisted by Articulate Storyline. It involved training and mentoring sessions which encompassed observation, sharing knowledge, and evaluation. These measures aimed at improving teachers’ understanding and skills in using Articulate Storyline to develop interactive instructional media for improved students' problem-solving skills. As evidenced by a 2-tailed paired sample test, the training and mentoring have been proven effective to improve teacher competence to augment students' problem-solving skills (p 0.000).
NUMERICAL ANALYSIS OF BLOOD VESSEL CONSTRICTION DUE TO ATHEROSCLEROSIS DISEASE USING FINITE VOLUME METHOD Fatahillah, Arif; Mubarokah, Umi; Megahnia Prihandini, Rafiantika; Wihardjo, Edy; Adawiyah, Robiatul; Hussen, Saddam; Monalisa, Lioni Anka
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 19 No 4 (2025): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol19iss4pp2661-2678

Abstract

Atherosclerosis is a leading cause of coronary heart disease. This study analyses how elliptically shaped stenoses alter blood-flow velocity in coronary arteries. The governing equations are discretised with the finite-volume method, coupling pressure and velocity through the SIMPLE (Semi-Implicit Method for Pressure-Linked Equations) algorithm and accelerating convergence with the Successive Over-Relaxation (SOR) technique. A weighted Gauss–Seidel iteration whose over-relaxation factor ( in this work) damps low-frequency error modes, cutting the number of iterations needed for residuals to fall below 10⁻⁴ by roughly 40 % compared with the standard Gauss–Seidel scheme. Simulations of 30 %, 50 %, and 70 % constrictions were carried out in MATLAB R2013a and ANSYS Fluent. Quantitative and qualitative cross-validation of the two software packages confirmed consistent velocity and pressure fields, though minor discrepancies arose from differing numerical schemes and model assumptions, underscoring the need for experimental verification. The highest centre-line velocity occurred at 70 % stenosis—0.72075 m/s in MATLAB versus 0.90 m/s in Fluent—while the lowest was recorded at 30 %. Velocity–pressure profiles showed that increasing inlet velocity or degree of narrowing elevates velocity but decreases pressure, with the largest drop (11492.4 Pa in MATLAB; 11747.32 Pa in Fluent) again at 70% stenosis. Study limitations include modelling blood as a Newtonian fluid and idealising arterial geometry; future work should incorporate non-Newtonian rheology and patient-specific shapes to enhance physiological accuracy.
Co-Authors Feri Widyawati, Yuli Lioni Anka Monalisa, Lioni Anka Mubarokah, Umi Robiatul Adawiyah Saddam Hussen Susi Setiawani WIHARDJO, EDY