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All Journal ECSOFiM (Economic and Social of Fisheries and Marine Journal) Journal La Multiapp
Emakarim, Lompo Ramos
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Engineering Environmental Science Social Sciences

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Bio-Economic Analysis of Red Snapper (Lutjanus spp.) in The Waters of Makassar City, South Sulawesi, Indonesia Yusuf, Muhammad; Riana, Andi Dyna; Rusneni, Rusneni; Malik, Malik; Ibrahim, Mardiana; Emakarim, Lompo Ramos; Umar, Nur Asia; Tajuddin, Mustamin; Hajriani, Sri
ECSOFiM (Economic and Social of Fisheries and Marine Journal) Vol 12, No 1 (2024): ECSOFiM October 2024
Publisher : Faculty of Fisheries and Marine Science, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.ecsofim.2024.012.01.01

Abstract

Effective fishery management is essential for sustaining fish resources, economic growth, and social well-being. Achieving optimal and sustainable exploitation levels requires determining key metrics: biomass, optimal effort, catch, and costs under various management regimes (sole owner/open access, MSY, MEY, and dynamic). This study aims to determine the optimal and sustainable management level of red snappers (Lutjanus spp.) in the waters of Makassar City. This research uses a quantitative analysis method with a bio-economic analysis technique. The research was conducted in the waters of Makassar City from June to December 2022. The bio-economic analysis indicates that red snapper production in Makassar waters can be further optimized, but current fishing efforts exceed the optimal limit, requiring improvements in the catch effectiveness and efficiency of the catch. The high fishing effort for red snapper in this area indicates inefficient fishing activities, which suggest the potential for fishing optimization. To reach the Maximum Sustainable Yield (MSY), the current fishing effort, which has reached 163,496 trips, must be reduced by 78,902 trips, or around 48.26%, to reach the optimal fishing point. Similarly, to achieve The Maximum Economic Yield (MEY), the fishing effort must be reduced by 90,925 trips, or approximately 55.61%.
Transforming Building Infrastructure into Communication Systems for Smart City: A Conceptual Analysis of Metallic Structures as Antennas Zain, Nurmayanti; Arifin, Farhan Rezki; Emakarim, Lompo Ramos
Journal La Multiapp Vol. 6 No. 6 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i6.2431

Abstract

The transformation of building infrastructure into intelligent communication systems is a key enabler of smart city development. This paper investigates the feasibility of utilizing metallic structural elements such as steel reinforcement bars, hollow sections, and galvanized steel as embedded antenna within building frameworks. To provide validated evidence, this work incorporates full-wave electromagnetic simulations using Ansys HFSS to analyze resonance behavior, impedance matching, radiation patterns, and gain performance in the sub-GHz band, particularly around 700 MHz for IoT applications. The simulation results demonstrate that selected building materials can achieve stable resonance and nearly omnidirectional radiation characteristics, with realized gains up to 0.47 dBi and bandwidths sufficient for LPWAN technologies such as NB-IoT and LoRaWAN. These findings confirm the dual functionality of structural metals, offering both mechanical strength and communication capability. The study provides a validated basis for future experimental prototyping and integration of antenna- embedded infrastructures in smart building environments.
Co-Authors Farhan Rezki Arifin Hajriani, Sri Malik Malik, Malik Mardiana Ibrahim Muhammad Yusuf Nur Asia Umar Nurmayanti Zain Riana, Andi Dyna Rusneni, Rusneni Tajuddin, Mustamin