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All Journal Jurnal Kesehatan Journal of Community Based Environmental Engineering and Management International Journal of Hydrological and Environmental for Sustainability
Wulandari, Marita
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Environmental Science Health Professions Public Health Other

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Hubungan Faktor Sosial Ekonomi dan Ketahanan Pangan terhadap Kejadian Stunting pada Balita Wardani, Dyah Wulan Sumekar Rengganis; Wulandari, Marita; Suharmanto, Suharmanto
Jurnal Kesehatan Vol 11, No 2 (2020): Jurnal Kesehatan
Publisher : Politeknik Kesehatan Tanjung Karang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26630/jk.v11i2.2230

Abstract

Indonesia ranks third as a country with the highest stunting prevalence in Southeast Asia in 2017. Bandar Lampung, is one of the cities with a high prevalence of stunting; and Teluk Betung Selatan Subdistrict is an area with the highest prevalence of stunting in Bandar Lampung. This study aims to analyze the relationship between socioeconomic factors and food security on the incidence of stunting in children under five years. This study is a case-control study, with a case sample of 50 families who have stunted children under five years and the control sample is 50 families who have normal children under five years. The research variables included socioeconomic factors (education and income), food security factors (family food insecurity and food diversity), and the incidence of stunting, which were then analyzed by Chi-Square. The results showed that there was a relationship between socioeconomic factors and family food insecurity to the incidence of stunting. Therefore, stunting control programs need to involve these two factors in the intervention to reduce stunting in children under five years.
Thermal Comfort and Airflow in Air-Conditioned Systems: Insights from Computational Fluid Dynamic Simulations Pebralia, Jesi; Aryanti, Yesi; Maulana, Lucky Zaehir; Restianingsih, Tika; Wulandari, Marita
International Journal of Hydrological and Environmental for Sustainability Vol. 4 No. 2 (2025): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v4i2.768

Abstract

Air conditioning (AC) systems are vital for ensuring thermal comfort in enclosed spaces, particularly in tropical regions like Indonesia, where high temperatures and humidity can challenge human productivity and well-being. This study investigates airflow distribution patterns in air-conditioned rooms using computational fluid dynamics (CFD) simulations, specifically employing the SST k-ω turbulence model. Simulations were conducted in a 3.5 × 3.55 × 3 m closed room with varied inlet temperatures (289.15–297.15 K) and airflow velocities (2–4 m/s). Results indicate that for every 2 K increase in inlet temperature, the average room temperature rises by approximately 1.37 K. Additionally, a 0.5 m/s increment in airflow velocity leads to an average temperature increase of 0.16 K. The airflow was observed to form a dominant jet stream from the AC inlet, flowing diagonally toward the lower part of the room, creating a low-altitude recirculation zone. This phenomenon influences thermal mixing and occupant comfort significantly. Validation of the CFD model revealed its robustness, with an average temperature deviation of 328.15 K and an Nash-Sutcliffe Efficiency (NSE) score of 0.858. Furthermore, the study suggests optimizing AC placement and operation parameters to enhance energy efficiency while maintaining comfort. These findings provide actionable insights into airflow behavior in tropical environments, promoting better design practices for cooling systems, which are crucial for sustainable development and improved living conditions in tropical climates.
Performance of Rapid Sand Filter Dual Media for Microplastic Removal in the Water: The Effect of Microplastic Size and Effective Size of Filter Media Wulandari, Marita; Marpaung, Kevin; Prasaningtyas, Asri; Yorika, Rahmi; Harfadli, Muhammad Ma'arij; Zulfikar, Ainun
Journal of Community Based Environmental Engineering and Management Vol. 8 No. 1 (2024): March 2024
Publisher : Department of Environmental Engineering - Universitas Pasundan - Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jcbeem.v8i1.12502

Abstract

Microplastics (MPs) significantly damage the environment and human health, leading to a growing global concern. MPs have been detected not only in the natural environment but also in the drinking water treatment process. One of the configurations of the drinking water treatment unit is filtration. Only a few research studies have been published on microplastic removal in the water system. This study was conducted to determine the performance of a rapid sand filter (RSF) in removing microplastics in water with a variation in the effective size (ES) of silica sand and microplastic size. In this study, microplastics are artificially made with size variations of < 400 μm and >400 μm. The filtering uses two variations in the adequate size (ES) of silica sand, namely 0.4 mm and 0.7 mm. At the same time, anthracite is only a control variable with ES = 0.69 with a flow speed of 4 m / h and an observation time of 30, 60, 90, and 120 minutes. The results show that the filter media ES 0.4 has the highest efficiency values of 91.30% for the microplastic size MPs <400 µm and 95.80 % for the larger microplastic >400 µm. In addition, the average percentage removal of ES 0.7 mm was 77.24 % for the size of MPs <400 µm and 95.77% for the size of Mps >400 µm. Gaining insight into the mechanisms involved in removing microplastics from drinking water is essential for developing more effective techniques for eliminating them.  
Co-Authors Aryanti, Yesi Dyah Wulan Sumekar Rengganis Wardani Harfadli, Muhammad Ma'arij Lucky Zaehir Maulana Marpaung, Kevin Pebralia, Jesi Prasaningtyas, Asri Restianingsih, Tika Suharmanto Suharmanto Yorika, Rahmi Zulfikar, Ainun