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All Journal Jurnal Sumberdaya Alam dan Lingkungan Jurnal Keteknikan Pertanian Tropis dan Biosistem Plantropica: Journal of Agricultural Science International Journal of Advances in Intelligent Informatics Journal of Social, Humanity, and Education
Yasa Palaguna Umar, Yasa Palaguna
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Religion Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Social Sciences

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Ambient PM2.5 Transport in Bandar Lampung City: HYSPLIT Model and Meteorological Profile Mustaqiman, Aulia Nur; Umar, Yasa Palaguna; Gustinasari, Kiki; Irawandani, Tia Dwi; Prayogo, Wisnu
Jurnal Sumberdaya Alam dan Lingkungan Vol 11, No 3 (2024)
Publisher : Brawijaya University

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Abstract

ABSTRACT Particulate Matter (PM2.5) is a hazardous air pollutant commonly found in urban areas, where emissions from transportation, industry, and fuel combustion significantly contribute to its concentration, posing serious risks to human health, air quality, and ecosystems. With rapid urbanization (1,073,451 people), transportation activities, and industrial growth, Bandar Lampung faces high PM2.5 concentrations from January to December 2023, up to 10.6 times the WHO threshold limit. This study analyzes the influence of daily meteorological conditions, such as wind speed, humidity, and temperature inversion, on the accumulation of PM2.5 pollutants in Bandar Lampung in 2023, focusing on August as the period with the highest pollution index (ISPU 155). This study utilizes the HYSPLIT application, which analyzes the sources and transport of PM2.5 pollutants based on wind direction. The HYSPLIT model results indicated that pollutants originate from the southeast at an altitude of 500 m and exhibit a more complex pattern at higher altitudes. Low wind speed (2.6 m/s) and low humidity (69%) during the month influenced the accumulation of PM2.5, reaching 53.6 µg/m³, exceeding the national threshold by 10.6 times. This study provided spatial information to support PM2.5 pollution mitigation efforts in Bandar Lampung by using the HYSPLIT model.  Keywords: Bandar Lampung, HYSPLIT, meteorology, PM2.5, wind speed
Analisis Penggunaan Lahan Pada Tingkat Rawan Bencana Erosi Berbasis di Taman Nasional Gunung Rinjani Nusa Tenggara Barat Umar, Yasa Palaguna; Lestari, Tri Fitria Indah; Anugroho, Fajri
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 12 No. 3 (2024): December 2024
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

Berdasarkan studi literatur yang dilakukan, tanah yang berada di kawasan Taman Nasional Gunung Rinjani (TNGR) memiliki bahan induk penyusun berupa pasir volkan dan abu. Hal tersebut menyebabkan potensi terjadinya erosi di kawasan TNGR akan meningkat, terutama pada saat musim hujan berlangsung. Hal ini dikarenakan energi kinetik dari air hujan akan memecah agregat tanah dan menyebabkan terjadinya erosi dengan faktor pendukung berupa kemiringan dan vegetasi. Oleh karena itu penelitian kali ini bertujuan untuk menghitung prediksi laju erosi di kawasan TNGR pada tahun 2024 berbasis metode spasial berdasarkan data 10 tahun terakhir dan memberikan rekomendasi konservasi pada jenis potensi erosi. Metode perhitungan yang digunakan adalah Universal Soil Lost Equation (USLE) dengan menggunakan pendekatan spasial berupa overlay data dari setiap faktor yang digunakan meliputi erosivitas hujan (R), erodibilitas tanah (K), panjang dan kemiringan lereng (LS) serta faktor vegetasi dan pengelolaan lahan (CP). Adapun potensi erosi tersebut diklasifikasikan menjadi beberapa kelas yaitu kelas sangat ringan dengan rentang 0-15 ton/ha/tahun yang mencakup 52% dari area TNGR, kelas ringan dengan rentang 15-60 ton/ha/tahun yang mencakup 13%, kelas sedang dengan rentang 60-180 ton/ha/tahun yang mencakup 18% dari area TNGR, kelas berat dengan rentang 180-480 ton/ha/tahun yang mencakup 12% dari area TNGR dan kelas sangat berat dengan rentang >480 ton/ha/tahun yang mencakup 5% dari area TNGR. Dari hasil pemetaan potensi erosi diberikan beberapa rekomendasi upaya konservasi untuk mengendalikan dan meminimalisir laju erosi di TNGR dengan menggunakan metode kombinasi (mekanik-vegetatif) berupa matras kawat dan tanaman Heteropogon contortus serta dengan menggunakan metode vegetatif.
Optimization of a Dual-Stage Filtration Unit Using Cation Resin, Zeolite, and Activated Carbon for Limewater Treatment in Mulyosari Hamlet, Malang Regency Fauzi, Rachmad Pratama; Sulianto, Akhmad Adi; Umar, Yasa Palaguna
Jurnal Sumberdaya Alam dan Lingkungan Vol 12, No 1 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jsal.2025.012.01.2

Abstract

ABSTRACT Access to potable water remains a critical challenge in rural limestone regions such as Mulyosari Hamlet, Malang Regency, where groundwater is often contaminated by high levels of calcium carbonate, total dissolved solids, and alkalinity. This study aimed to evaluate the effectiveness of a simple water filtration system utilizing locally available media to reduce these contaminants and achieve compliance with national drinking water standards. The filtration unit consisted of two cylinders filled with cation exchange resin, silica sand, activated carbon, and natural zeolite, and was tested over a four-month dry season period. Groundwater samples were collected before and after treatment for chemical and hydraulic analysis. Results showed significant reductions in total dissolved solids from 396 to 182 mg.L-1 (54%), calcium carbonate from 424 to 228 mg.L-1 (46%), and alkalinity from 298 to 48 mg.L-1 (84%). Boiling the filtered water further improved water quality. The system maintained a steady discharge rate of 1.4 m³.h-1 and hydraulic retention times between 13.1 and 26.2 seconds, with minimal head loss. These findings confirm that the simple filtration system is both technically feasible and economically viable for household application, offering substantial benefits for water quality improvement and public health in rural limestone-affected communities. Keywords:  lime water, mulyosari hamlet, environmental health, simple water filtration, drinkable water 
Analisis Dinamika Vegetasi Tumbuhan Bawah (Understorey) di Tegakan Agroforestri dan Monokultur Jati (Tectona grandis) Akibat Perubahan Musim Setiawan, Adi; Kholifah, Izzah Nurul; Ramadhana, Varotama Putra; Aini, Nurul; Umar, Yasa Palaguna
Plantropica: Journal of Agricultural Science Vol. 9 No. 1 (2024)
Publisher : Department of Agronomy, Faculty of Agriculture, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpt.2024.009.1.1

Abstract

ABSTRAKPola tanam dan perbedaan musim memberikan pengaruh pada keanekaragaman dinamika dan komposisi spesies tumbuhan bawah pada tanaman jati (Tectona grandis) yang merupakan tanaman deciduous. Penelitian ini bertujuan untuk mengetahui keragaman spesies, dinamika dan komposisi vegetasi tumbuhan bawah yang ada pada pola tanam agroforestri (AF) dan monoculture (MN) jati pada musim hujan (RS) dan musim kemarau (DS). Survei lapang telah dilaksanakan pada bulan Februari-Maret dan Juli-Agustus 2023 di kawasan hutan produksi jati Perum Perhutani Kecamatan Kalipare, Kabupaten Malang, Jawa Timur. Kami menggunakan frame ukuran 1 x 1 m dan meletakkannya secara sistematis. Total 117 petak diamati yang terbagi menjadi 27 petak untuk AF dan 90 petak untuk MN. Jarak antar Plot adalah 5 m yang di tandai posisinya dengan Global Positioning System (GPS) dan label penanda. Pada tiap plot dilakukan pengamatan dan di catat jenis spesies, persentase tutupan vegetasi serasah dan tanah terbuka serta menghitung Nilai Kesamaan Sorensen (IS). Adapun pengamatan faktor lingkungan meliputi faktor naungan (keterbukaan kanopi) dan air (curah hujan). Kami gunakan kamera hemisperical lens (Samsung gear 360°) yang diambil 1 m di atas titik petak kemudian dianalisis menggunakan GLA 2.0 untuk memperoleh keterbukaan canopy. Faktor curah hujan di peroleh dari data Stasiun klimatologi setempat. Hasil penelitian menunjukkan terdapat perbedaan spesies tumbuhan bawah di AF dan MN jati. Komposisi tumbuhan bawah MN meliputi 49 spesies dari 23 famili sedangkan di AF terdapat 35 spesies dari 16 famili. Vegetasi pada AF dan MN jati memiliki komposisi dan struktur yang berbeda. MN jati pada MK memiliki keragaman yang lebih tinggi dibanding pola tanaman AF karena AF di wilayah tersebut lebih mirip monokultur tanaman semusim yang intensif. Faktor keterbukaan kanopi dan curah hujan memiliki pengaruh signifikan terhadap tutupan vegetasi
Augmented haar cascade classifier for real-time ball detection in humanoid robots under dynamic environments Setyawan, Gembong Edhi; Widasari, Edita Rosana; Prasetio, Barlian Henryranu; Umar, Yasa Palaguna; Adipratama, Ivan Rafli
International Journal of Advances in Intelligent Informatics Vol 12, No 1 (2026): February 2026
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/ijain.v12i1.2146

Abstract

This study proposes an Augmented Haar Cascade Classifier (AHCC) to enhance real-time ball detection for humanoid robots operating in dynamic environments. The method integrates Convex Hull mapping, HSV-based segmentation, and Hough Circle validation to overcome challenges such as fluctuating illumination, complex backgrounds, and partial occlusions. Experiments were conducted entirely on a CPU-only Intel NUC platform running ROS without GPU acceleration, using a dataset containing variations in lighting, orientation, scale, and background clutter. Compared with baseline models (standard Haar Cascade Classifier (HCC) and YOLOv5) the proposed AHCC achieved 97% accuracy, 83% recall, 97% precision, and an 89% F1-score, while requiring only 0.00849 s per frame with 8.97% memory usage. Although YOLOv5 reached 99% accuracy, it demanded higher computational resources (0.0344 s per frame, 22.3% memory usage), limiting its practicality for embedded robotic systems. The AHCC therefore offers an optimal balance between detection reliability and computational efficiency, outperforming traditional HCC and providing a lightweight alternative to GPU-dependent detectors such as Tiny-YOLO and MobileNet-SSD.
The Nexus of Participation, Co-Production of Knowledge, and Community Resilience in Waste Management in Bulusan Ramadhani, Yoga; Safira, Putri Alyaa; Gultom, Gertha Maria; Diphda, Bintang Corvi; Foraihmbarasi, Angelique Kishiola Prima; Prakoso, Rayhan Aulia; Umar, Yasa Palaguna
Journal of Social, Humanity, and Education Vol. 6 No. 3 (2026): May
Publisher : Goodwood Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/jshe.v6i3.3899

Abstract

Purpose: This study evaluates the reasons for the failure of technological interventions to foster community resilience within the “Sampah Terkelola, Lingkungan Terjaga” program in Bulusan Village. Research Methodology: Using a qualitative case study, data were gathered through participant observation (July–August 2025), semi-structured interviews, and document analysis. The Community Capitals Framework (CCF), participation theory, and knowledge co-production served as primary diagnostic lenses. Results: Findings indicate that while the program bolstered built and human capital through infrastructure, it neglected financial and political capital. This imbalance, driven by top-down planning and the lack of a revenue model, led to the immediate stagnation of the local Waste Bank post-intervention. Conclusions: Sustainable waste management requires a shift in focus from technology transfer to the co-production of managerial knowledge and the institutionalization of governance structures that balance all community capital. Limitations: This study is restricted to a short-term qualitative assessment of a single village and lacks longitudinal data. Contributions: This research advances the environmental sociology and rural development literature by establishing the CCF as a critical evaluative tool for predicting the institutional durability of community-based interventions. This explicitly demonstrates that social capital integration is a prerequisite for, rather than a byproduct of, technological success in waste management.
Co-Authors Adipratama, Ivan Rafli Aini Nurul Akhmad Adi Sulianto, Akhmad Adi Barlian Henryranu Prasetio Diphda, Bintang Corvi Edita Rosana Widasari, Edita Rosana Fachry Abda El Rahman Fajri Anugroho, Fajri Fauzi, Rachmad Pratama Foraihmbarasi, Angelique Kishiola Prima Gembong Edhi Setyawan Gultom, Gertha Maria Gustinasari, Kiki Kholifah, Izzah Nurul Lestari, Tri Fitria Indah Mustaqiman, Aulia Nur Prakoso, Rayhan Aulia Prayogo, Wisnu Ramadhana, Varotama Putra Ramadhani, Yoga Safira, Putri Alyaa Tia Dwi Irawandani