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All Journal Jurnal Teknosains Community Development Journal: Jurnal Pengabdian Masyarakat Journal Research of Social Science, Economics, and Management
Pamungkas, Bagus
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Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Environmental Science Health Professions Industrial & Manufacturing Engineering Mechanical Engineering Public Health

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Impact of land use changes on the tsunami hazards in part of coastal Kebumen Pamungkas, Bagus; Mardiatno, Djati; Retnowati, Arry
Jurnal Teknosains Vol 13, No 1 (2023): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.80954

Abstract

This research was conducted to analyze land use change from 2016 to 2022 and their impact on the tsunami hazard zone on the coast of Kebumen Regency. For land use change analysis, remote sensing, geographic information systems (GIS), and statistical tests were applied to Sentinel-2A satellite imagery. The tsunami hazard was simulated using tsunami inundation modeling based on land use spatial data and DEMNAS processed using GIS. Land use changes occurred significantly in the study area, especially in Mirit District. The Southern Cross Road (JJLS) and coastal morphological conditions influence land use change patterns. Land use changes impact changes in the tsunami hazard zone, especially in the use of fir forests and shrimp ponds. The research findings can be used as input for developing a tsunami disaster mitigation plan and detailed spatial planning on the coast of Kebumen Regency.
Portfolio Efficiency Analysis of JAPFA and Indofood CBP Using the Efficient Frontier Approach: Implications for Food Sector Policy Yuliani, Poppy; Pamungkas, Bagus; Albart, Nicko
Journal Research of Social Science, Economics, and Management Vol. 4 No. 10 (2025): Journal Research of Social Science, Economics, and Management
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jrssem.v4i10.842

Abstract

The Indonesian capital market, particularly the food sector, is undergoing significant changes due to strategic government policies such as the free lunch program, which directly influence market dynamics and investor behavior. This study addresses the problem of how investors can optimize portfolio efficiency between two dominant food sector stocks, JAPFA and Indofood CBP (ICBP), under regulatory uncertainty. The primary objective is to identify an optimal portfolio allocation that balances risk and return using the Efficient Frontier approach developed by Markowitz (1952). Employing a quantitative descriptive method, daily stock price data from January to December 2024 were analyzed to simulate portfolio weights, expected returns, and risks. Results reveal a very low correlation (0.085) between JAPFA and ICBP, indicating strong diversification benefits that minimize portfolio risk without sacrificing returns. An optimal portfolio allocation around 30% JAPFA and 70% ICBP is recommended to maximize investment efficiency. The study's findings have important implications for investors, portfolio managers, and policymakers by demonstrating how diversification in the food sector can hedge against market volatility driven by government interventions. This research enriches the literature on portfolio management by integrating policy-driven market conditions. Future research should explore multi-asset portfolios, incorporate macroeconomic factors, and apply advanced optimization techniques such as artificial intelligence to better navigate complex and evolving market environments.
SOSIALISASI PENGGUNAAN AIR IMPACT WRENCH PADA UKM BENGKEL TAMBAL BAN TRUCK DAN TUBELESS UNTUK MEMPERCEPAT WAKTU OVERHOUL RODA DAN BAN : - Bodro, Rohmat Subodro; Ashari, Firdaus; Susilo, Mascuk; A, Ilham Fathur Rahman; Pamungkas, Bagus
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 6 No. 2 (2025): Volume 6 No. 2 Tahun 2025
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v6i2.29526

Abstract

Dengan meningkatnya jumlah kendaraan roda empat dan roda dua, bengkel tambal ban adalah bisnis masyarakat kecil dan menengah yang menawarkan jasa dan pelayanan perbaikan ban. Di daerah jalan raya Mulur – Mojolaban ini ada banyak lalu lalang Truck dan Mobil Pribadi maupun Sepeda Motor, karena daerah ini ada beberapa galian tanah urug yang mobil pengangkutnya adalah mobil Dum Truck. Hal ini tentu menjadi peluang bagi Warga Mulur dan sekitarnya untuk mendirikan usaha tambal ban. Sejauh ini pun bisnis tambal ban tetap berjalan agar bisa menghidupi keluarga. Cuaca yang sangat panas dikarenakan lokasi yang tidak beratap, berakibat mempercepat kelelahan dan kepanasan mekanik tambal ban ditambah belum adanya pakaian kerja bagi mekanik tambal ban yang mencakup sarung tangan, topi, baju kerja lapangan dan sepatu lapangan. Bengkel Tambal Ban Truck dan Tubeless dengan fasilitas dan peralatan yang lengkap akan memudahkan perbaikan ban kendaraan. Hal Ini dapat meningkatkan efisiensi dan kualitas pelayanan pelanggan yang akan berakibat meningkatkan pendapatan pemilik usaha.
Co-Authors A, Ilham Fathur Rahman Albart, Nicko Arry Retnowati Ashari, Firdaus Bodro, Rohmat Subodro Djati Mardiatno Susilo, Mascuk Yuliani, Poppy