Garuda - Garba Rujukan Digital

EFFECT OF RAINFALL ON THE CHEMICAL COMPOSITION OF RAINWATER IN MONITORING ACID DEPOSITION IN GREATER BANDUNG Dandy Rievaldo; Indra Chandra; Wiwiek Setyawati; Asri Indrawati; Dyah Aries Tanti; Ardiansyah Ramadhan; Lutfhi Rizqi Mubarok; Tazlila Rahmi Rasyid; Azrina Abd Aziz; Zainal Arid Burhanudin
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 6, NUMBER 1, APRIL 2023
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v6i1.14051

Aim: The study aimed to investigate the impact of rainwater on the acidity levelsto monitor acid deposition and identify sources of pollutant that affect the acidity concentrations of rainwater. Methodology and Results: One unit of rainwater sampler in each location was employed, andsamples were taken to the National Research and Innovation Agency laboratory (BRIN) for analysis of rainwater quality including acidity/pH degree, conductivity, and ion concentrations. The results show that high rainfall intensity (>300 mm/month) in April and December 2019 led to a decrease in electrical conductivity (<10 mS/cm) and ion compounds (>200 μmol/L) of rainwater, likely due to the dissolution/washing process of anions in the air during the rainy season and acid and alkaline neutralization in the dry season. The most identified chemical compounds were ammonium (NH4+), sulfate (SO42-), nitrate (NO3-), and salt (NaCl). Conclusion, significance, and impact study: Based on back-trajectory projections, the decline in rainwater quality was attributed to both local emissions (transportation, industry, agriculture, and waste burning) and long-range sources (earth crust, oceans, coastlines, marine activities, and anthropogenic and forest fires in the Australian territory).

Digital Transformation in Environmental Security Management in Calosa Cluster, Bandung Regency Surya Michrandi Nasution; Reza Rendian Septiawan; Ardiansyah Ramadhan
JARDIRA – Jurnal Pengabdian Digital dan Rekayasa Informatika Vol. 1, No. 1, July 2025
Publisher : CogniSpectra Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65917/jardira.v1i1.20

Background: This community service activity aims to enhance environmental security in residential areas through digital transformation by integrating technology and community empowerment. Conducted at the Calosa Cluster, Bandung Regency, this program was initiated due to frequent losses and the limited effectiveness of existing surveillance systems, especially in blind spots. The objective is to develop a sustainable and community-managed security system using modern surveillance technology. Contribution: This program contributes to the community by increasing residents' sense of security, enhancing technological literacy, and fostering collective responsibility in managing neighborhood safety. Method: A participatory and collaborative approach was applied, involving residents, housing managers, and a university implementation team. The method included needs analysis, planning, training, and system installation. Surveys and interviews were conducted to identify security gaps, followed by the installation of devices and training on CCTV operation and data management. Results: The implementation successfully improved surveillance coverage and reliability. Residents gained practical skills to operate and manage the system independently. The positive response indicated a strengthened sense of security and community involvement. Conclusion: The program successfully addressed the security challenges in the Calosa Cluster through a digitally based, community-oriented solution. It demonstrates that integrating technology and community participation can create an effective, sustainable environmental security model applicable to similar residential areas.

EFFECT OF RAINFALL ON THE CHEMICAL COMPOSITION OF RAINWATER IN MONITORING ACID DEPOSITION IN GREATER BANDUNG Dandy Rievaldo; Indra Chandra; Wiwiek Setyawati; Asri Indrawati; Dyah Aries Tanti; Ardiansyah Ramadhan; Lutfhi Rizqi Mubarok; Tazlila Rahmi Rasyid; Azrina Abd Aziz; Zainal Arid Burhanudin
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 6, NUMBER 1, APRIL 2023
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v6i1.14051

Aim: The study aimed to investigate the impact of rainwater on the acidity levelsto monitor acid deposition and identify sources of pollutant that affect the acidity concentrations of rainwater. Methodology and Results: One unit of rainwater sampler in each location was employed, andsamples were taken to the National Research and Innovation Agency laboratory (BRIN) for analysis of rainwater quality including acidity/pH degree, conductivity, and ion concentrations. The results show that high rainfall intensity (>300 mm/month) in April and December 2019 led to a decrease in electrical conductivity (<10 mS/cm) and ion compounds (>200 μmol/L) of rainwater, likely due to the dissolution/washing process of anions in the air during the rainy season and acid and alkaline neutralization in the dry season. The most identified chemical compounds were ammonium (NH4+), sulfate (SO42-), nitrate (NO3-), and salt (NaCl). Conclusion, significance, and impact study: Based on back-trajectory projections, the decline in rainwater quality was attributed to both local emissions (transportation, industry, agriculture, and waste burning) and long-range sources (earth crust, oceans, coastlines, marine activities, and anthropogenic and forest fires in the Australian territory).

POLICY FORMULATION FOR ANTICIPATING THE IMPACT OF ACID RAIN ON PADDY PLANTS USING NORMATIVE JURIDICAL ANALYSIS Ardiansyah Ramadhan; Helni Murtiarsih Jumhur; Fathan Ananta Nur
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 7, NUMBER 2, OCTOBER 2024
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v7i2.19451

Law Number 32 of 2009 Article 57, paragraph 4C that one of the preservations of atmosphere functions regulate efforts to protect against acid rain. One of the effects of acid rain is soil damage to plants, such as what happened to paddy plants. In Indonesia, paddy is one of the priority food sources, but every year, it decreases in several regions. Aims: This study aimed at acid rain's anticipated impact on paddy plants in this case study Bandung Regency. Methodology and results: The approach method in this study is a normative juridical approach, using primary data sources obtained through interviews and journal literature. Then, secondary data from legal literature were analyzed descriptively and qualitatively. The study results show that the Bandung Regency Environmental Service has enforced the law. However, violations still occur by industry and society through vehicle emissions, coupled with the increase in population. One of the efforts to formulate policies to anticipate acid rain in paddy plants is to establish sanctions for violators who still pollute the environment, apply catalytic converters to vehicle exhausts that have the potential to remove NOx, carry out measurements at groundwater measurement stations, water quality information systems (manual or real-time). In addition, the irrigation policy for river water flowing on agricultural land with existing laws is being improved. Conclusion, significance, and impact study: Anticipating the impact of acid rain on rice requires various approaches, both technical and non-technical, as well as further analysis from various policy sectors.

A SEASONAL IMPUTATION METHOD FOR ADDRESSING MISSING DATA IN ENVIRONMENTAL IOT SENSOR TIME SERIES Ardiansyah Ramadhan; Surya Micrandi Nasution; Reza Rendian Septiawan; I Kadek Nuary Trisnawan; Angel Metanosa Afinda
Jurnal Riset Informatika Vol. 8 No. 2 (2026): Maret 2026
Publisher : Kresnamedia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34288/jri.v8i2.475

Missing and incomplete observations in Environmental IoT sensor networks reduce data reliability and disrupt analyses, especially for temperature and humidity time series exhibiting strong diurnal seasonality. This study develops and evaluates a seasonal imputation method to address missing data in IoT-based environmental monitoring, using a workflow of anomaly detection, outlier removal, time-of-day-aware imputation, and performance evaluation under varying missing-rate scenarios. Key challenges include sensor noise, connectivity issues, and intermittent hardware failures, which degrade data integrity and affect trend analysis, forecasting, and anomaly detection. To mitigate these, the method uses hourly and minute-level seasonal patterns after filtering out physically unrealistic values. Experimental results show high accuracy and robustness in reconstructing temperature and humidity data: temperature imputation achieves MAE values of approximately 0.86–0.87°C, and humidity yields MAE values of 3.92–4.01%RH, with no performance drop even at 50% data loss. The imputed series preserves natural diurnal dynamics without introducing distortions, effectively restoring continuity and structural consistency in environmental IoT time series for reliable modeling, feature extraction, and decision support.

Utilizing Natural Language Processing for the Analysis of BMKG Decadal Atmospheric Dynamics Reports in 2025 Ardiansyah Ramadhan; Aaz Muhmmad Hafidz Azis
Jurnal Teknologi Informasi dan Multimedia Vol. 8 No. 1 (2026): February
Publisher : Sekawan Institut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35746/jtim.v8i1.946

The Meteorology, Climatology, and Geophysics Agency (BMKG) publish decennial reports that provide valuable insights into Indonesia's meteorological conditions and their temporal fluctuations. However, due to their narrative structure, conducting direct quantitative analysis is problematic. This study seeks to address this issue by using a transparent, repeatable natural language processing (NLP) method to identify temporal trends in climatic conditions favourable to the formation of acid rain. The collection contains 36 BMKG decadal atmospheric dynamics studies for 2025. The proposed approach entails gathering textual input, performing basic preprocessing (case normalization, character sanitization, space-based tokenization, and stop-word removal), and subsequently employing predefined keyword dictionaries for analysis. These dictionaries delineate weather conditions that either facilitate or inhibit the formation of acid rain. The scores for acid rain conditions are determined by the frequency of specific keywords, adjusted for the document's length. Subsequently, they are categorized into groups utilizing statistical thresholds derived from the mean and standard deviation of the adjusted scores. Non-parametric statistical tests are employed to examine temporal patterns with greater specificity. The findings indicate that normalized acid rain scores are elevated in the initial years of the decade, specifically 2025, before gradually declining until year-end. The Spearman rank correlation test reveals a statistically significant negative correlation between normalized scores and time (\rho = -0.494, p = 0.0022). The Mann–Kendall test indicates a significant downward trend (Z = -2.902). These results demonstrate that the climatic conditions responsible for acid rain occurred only temporarily, rather than year-round. The core element of this work is a straightforward, lexicon-based NLP approach that is easily understood, replicable, and applicable, and can transform narrative atmospheric reports into structured quantitative metrics. This is beneficial for research on atmospheric dynamics and environmental analysis with official written data.

Digital Transformation and Strengthening of Mosque Security Systems at Al-Quddus G-Land Arcadia Bojongsoang Towards a Smart Worship Environment (Smart Mosque) Reza Rendian Septiawan; Ardiansyah Ramadhan; Iga Narendra Pramawijaya; Ridho Ramadani Saputra; Kirei Kirani Jayusman; Deo Prima Listiono
JARDIRA – Jurnal Pengabdian Digital dan Rekayasa Informatika Vol. 2 No. 2 (2026): Vol. 2, No. 2, July 2026
Publisher : CogniSpectra Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65917/jardira.v2i2.73

Background: Al-Quddus Mosque in the G-Land Arcadia residential complex, Bojongsoang, functions as an important religious and social center for the local community. However, increasing activity levels and conventional security practices have exposed the mosque to risks such as theft, vandalism, and limited monitoring capabilities. Contribution: This community service program aimed to support the digital transformation of the mosque through the deployment of a smart security system as an initial step toward developing a Smart Mosque environment. Method: The program was implemented through four stages: situational analysis, system design, deployment of a high-definition CCTV surveillance network integrated with a Network Video Recorder (NVR), and operational training for mosque administrators. The surveillance system utilized Ezviz H3C Color 2MP cameras strategically installed in indoor and outdoor areas. A post-installation survey was conducted to evaluate community responses. Results: The digital security system was successfully installed and formally handed over to mosque administrators for future operation and maintenance. Training activities improved administrators’ readiness to operate the system independently. Survey results showed a highly positive response, with 99.35% of respondents agreeing or strongly agreeing that the project met community needs and should be continued in the future. Conclusion: The implementation transformed mosque security management from a conventional approach toward a proactive digital system. The initiative strengthened security infrastructure, enhanced community preparedness in managing digital assets, and provided a replicable model for technology-based religious facility management in the Society 5.0 era.

Implementation of Sustainable Lighting Through Community Involvement to Support Clean and Affordable Energy in Puri Cikoneng Indah Housing, Bojongsoang District, Bandung Regency Reza Rendian Septiawan; Ardiansyah Ramadhan; Ashri Dinimaharawati; Galang Adira Prayoga
JARDIRA – Jurnal Pengabdian Digital dan Rekayasa Informatika Vol. 2, No. 1, January 2026
Publisher : CogniSpectra Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65917/jardira.v2i1.56

Background: Inadequate environmental lighting in residential areas can increase safety risks and reduce community comfort, particularly during nighttime activities. This community service program was conducted in the Puri Cikoneng Indah Residential Area to address limited public lighting through the implementation of a sustainable solar-powered lighting system. The program aimed to improve environmental safety, support clean energy utilization, and empower the local community in managing renewable energy technologies. Contribution: The contribution of this program lies in providing a renewable energy–based lighting solution that enhances nighttime visibility and security while increasing community awareness of clean energy practices. In addition, the activity serves as a practical and replicable model for neighborhood-scale renewable energy implementation. Method: A community-based approach was employed by actively involving residents throughout all stages of the program. The implementation process included field surveys, identification of lighting needs, system design, socialization and technical education, installation of solar-powered lighting components, and monitoring and evaluation to ensure system functionality and sustainability. Results: The results showed that an integrated solar-powered lighting system was successfully installed and operated independently from the conventional electrical grid. The residential environment became brighter and safer at night, and residents demonstrated improved understanding of the basic operation and maintenance of solar energy systems. Conclusion: Overall, the program achieved its objectives by improving environmental safety, promoting clean energy adoption, and strengthening community participation, thereby contributing to sustainable development at the local level.

Digitalisasi Website Koperasi Desa dan Kelurahan Merah Putih di Kecamatan Baleendah, Dayeuhkolot, dan Bojongsoang Ardiansyah Ramadhan; Naufal Hanan Lutfianto; Linda Meylani; Felix Corputty; Thalita Dewi Rahmaniar; Iswahyudi Hidayat
ABDI: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 8 No 3 (2026): Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat
Publisher : Labor Jurusan Sosiologi, Fakultas Ilmu Sosial, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/abdi.v8i3.2059

Perkembangan teknologi digital menuntut Koperasi Desa/Kelurahan Merah Putih (KDMP) meningkatkan pemanfaatan kanal digital untuk memperluas akses informasi dan pemasaran, sementara KDMP di Kecamatan Baleendah, Dayeuhkolot, dan Bojongsoang masih menghadapi keterbatasan dalam pengelolaan website dan pemasaran digital. Program pengabdian kepada masyarakat ini bertujuan memperkuat kapasitas digital pengurus melalui pengembangan dan pemanfaatan website sebagai media informasi resmi, etalase produk UMKM, dan sarana pemasaran daring. Kegiatan dilaksanakan pada 15 November 2025 pukul 08.00–16.30 WIB untuk Kecamatan Baleendah, Dayeuhkolot, dan Bojongsoang dengan melibatkan 35 pengurus dari 19 koperasi desa/kelurahan. Metode pelaksanaan menggunakan pendekatan partisipatif dan hands-on melalui identifikasi kebutuhan, pengembangan website berbasis Content Management System (CMS), workshop, praktik langsung pengelolaan website dan digital marketing, serta pendampingan. Hasil kegiatan menunjukkan bahwa 19 website KDMP berhasil dibangun dan diaktifkan sebagai kanal informasi, etalase produk, dan media promosi koperasi. Evaluasi kualitatif melalui wawancara menunjukkan 75% respons positif, 25% netral, dan tidak terdapat respons negatif, yang mengindikasikan penerimaan yang baik terhadap pemanfaatan website dan pemasaran digital. Respons peserta juga menunjukkan adanya pemahaman praktis mengenai penggunaan kanal digital, komitmen untuk membagikan pengetahuan kepada anggota lain, serta keinginan untuk mengintegrasikan website dengan kebutuhan operasional koperasi. Temuan tersebut menunjukkan bahwa pendekatan hands-on memberikan pengalaman langsung yang relevan dalam mendukung adopsi teknologi digital oleh pengurus koperasi. Dengan demikian, digitalisasi website dan pelatihan pemasaran digital memberikan fondasi bagi penguatan komunikasi, promosi produk, dan perluasan jangkauan pemasaran KDMP secara berkelanjutan.

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