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Politeknik Ilmu Pelayaran Makassar
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ANALISIS OPERASIONAL RADAR SECARA OPTIMAL SAAT BERNAVIGASI DI KM ORIENTAL GALAXY Sultan; Ika Mustika; Nur Indah Sari; Ismail
JURNAL VENUS Vol. 13 No. 2 (2025): September
Publisher : PIP Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.48192/vns.v13i2.812

Abstract

Penelitian ini bertujuan untuk mengkaji permasalahan dalam operasional radar saat bernavigasi di KM ORIENTAL GALAXY serta mengidentifikasi upaya optimalisasi pengoperasiannya. Metode penelitian yang digunakan adalah pendekatan kualitatif, dengan teknik pengumpulan data berupa observasi langsung dan wawancara terhadap pihak-pihak terkait. Hasil penelitian menunjukkan bahwa pengoperasian radar di kapal belum sepenuhnya memenuhi standar operasional prosedur yang berlaku. Ditemukan beberapa kendala, antara lain inefektivitas radar dalam mendeteksi target dan potensi bahaya navigasi, kinerja magnetron yang menurun, serta adanya area blind sector pada cakupan radar. Selain itu, juga teridentifikasi fenomena anomali seperti kemunculan spurious echoes yang tidak sesuai dengan objek nyata. Upaya perbaikan diarahkan pada peningkatan kompetensi kru melalui pelatihan dan penyuluhan tentang pengoperasian radar yang benar. Penelitian ini menekankan pentingnya awareness terhadap keterbatasan teknis radar, serta perlunya pemeliharaan rutin untuk meningkatkan akurasi dan keandalan radar dalam mendukung keselamatan pelayaran. Dengan meningkatkan pemahaman dan keterampilan dalam penggunaan radar, diharapkan keselamatan navigasi kapal dapat lebih terjamin
COST EFFECTIVE APPROACH: OPTIMAL CONTROL APPLICATION IN NARCOTICS ABUSE MODEL BY INVOLVING THE NUMBER OF DEATHS Thaibil Anwar; Eka Nurmala; Wahyudi; Sanusi; Sultan; Muhammad David
International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS) Vol. 6 No. 3 (2026): June
Publisher : CV. Radja Publika

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Abstract

Narcotics abuse represents a critical global public health challenge requiring strategic intervention through prevention and treatment mechanisms. This study addresses a significant gap in existing mathematical models of narcotics abuse by incorporating mortality as an explicit variable. While the foundational LH (Light user–Heavy user) model has been instrumental in understanding drug abuse dynamics, it fails to account for the substantial mortality burden associated with narcotics abuse. This research develops an extended LHD (Light user–Heavy user–Death) model by adding a death state to the original LH framework. The model is calibrated using data from Indonesia's National Narcotics Agency (BNN) through parameter selection that approximates observed trends. Optimal control theory is applied to minimize prevention and treatment budgets while maximizing intervention effectiveness. Simulations were conducted under three budget scenarios: unrestricted, restricted (Rp 735 billion based on 2014 allocation), and balanced (fifty–fifty allocation). Results demonstrate that prevention strategies dominate under unrestricted budget conditions, achieving a 78.8% reduction in light users, while treatment interventions become more prominent under budget constraints, with optimal resource allocation varying significantly across scenarios. The findings provide empirical evidence for evidence-based policy formulation in narcotics control programs and contribute methodologically to the field of mathematical epidemiology by explicitly modeling mortality dynamics in substance abuse.
Co-Authors Eka Nurmala Ika Mustika Ismail Muhammad David Nur Indah Sari Sanusi Thaibil Anwar Wahyudi