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Long Range Flood Detection sebagai Antisipasi Dini dan Mitigasi Risiko Bencana Banjir di Provinsi Bengkulu Syahputri, Nasyah Wulandari; Santosa, Hendy; Daratha, Novalio
Science and Physics Education Journal (SPEJ Vol 7 No 2 (2024): SPEJ (Science and Physic Education Journal)
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/spej.v7i2.8711

Banjir merupakan bencana alam yang sering mengancam berbagai daerah dan mengakibatkan dampak serius terhadap masyarakat dan infrastruktur. Upaya pencegahan dan mitigasi diperlukan untuk mengurangi risiko dan mitigasi kerugian yang ditimbulkan. Penelitian ini menyoroti solusi potensial dengan memperkenalkan alat pendeteksi banjir menggunakan teknologi Long Range (LoRa) pada frekuensi 915MHz. Alat ini bertujuan memberikan informasi dini terkait kemungkinan terjadinya banjir, sehingga memungkinkan respons cepat untuk mengurangi risiko korban jiwa dan kerusakan fasilitas. Uji coba LoRa dilakukan dengan mencatat nilai RSSI dan SNR pada jarak 900 m dan ketinggian 1 m. Hasil pengujian menunjukkan nilai RSSI -112,73 dan SNR -1,32, menggambarkan performa komunikasi yang memadai pada jarak yang diuji. Tambahan, alat ini memanfaatkan Pembangkit Listrik Tenaga Surya (PLTS) untuk menyuplai energi ke sirine dan alarm, meningkatkan keandalan dan kemandirian sistem deteksi banjir. Kata Kunci : Banjir, Long Range, PLTS

Development of A 5.4 Ghz C-Band Microstrip SAR Antenna for A Tsunami Detector Chaniago, Erik; Haidi, Junas; Santosa, Hendy
Jurnal Teknologi Dirgantara Vol 20, No 2 (2022): Jurnal Teknologi Dirgantara
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2022.v20.a3939

A Tsunami is a series of massive oceanic waves resulting from profound tectonic activities in the seabed. The disaster's devastating effect makes fast information delivery during a tsunami crucial in minimizing losses. For this reason, Tsunami warning systems need to be supported by a rapid detection technology. In recent years, radar has been implemented as a tsunami detector due to its sensitivity to oceanic waves. An array antenna using advanced microstrip technology, as the main component of a radar system, can fulfill the requirement for tsunami rapid detection. This paper presents the work that we conducted to develop a tsunami detection antenna using the array approach to improve gain and optimize radiation patterns. We designed a patch antenna with 12 mm in length and 21 mm in width and performed some simulations to obtain the antenna parameters such as gain, bandwidth, and optimal radiation patterns. As the results of our investigation, we determined the resonance frequency to be 5.4 GHz. The study produced a gain of 9.07 dB through simulations on an antenna that resonates at a frequency that meets the antenna work criteria, which include a loss of -26.69 dB, a VSWR of 1.09, and an HPBW (Half Power Beamwith) of 17.3°. Those values indicate that the antenna designed for tsunami detector applications functions correctly.

Optimal Phase Selection Of Single-Phase Appliances In Buildings Using String-Coded Genetic Algorithm Daratha, Novalio; Vatresia, Arie; Santosa, Hendy; Agustian, Indra; Suryadi, Dedi; Gupta, Neeraj
Jurnal Teknik Informatika (Jutif) Vol. 6 No. 3 (2025): JUTIF Volume 6, Number 3, Juni 2025
Publisher : Informatika, Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jutif.2025.6.3.4603

Phase imbalance in buildings, primarily caused by single-phase loads and generation, leads to increased neutral current, voltage imbalance, reduced energy efficiency, and potential equipment damage. To address these challenges, an optimal phase selection method is proposed for single-phase loads and generation. This method integrates integer programming with a string-coded genetic algorithm (GA). The GA employs string encoding to represent phase connections. Initially, a Mixed Integer Programming (MIP) solver identifies an initial solution, which is subsequently transformed into a string to initialize the GA’s genes. Subsequently, the GA executes standard operations such as mutation, crossover, evaluation, and selection. Case studies demonstrate the efficacy of this method in achieving substantial load balancing. Notably, the identification of multiple solutions with identical objective function values renders this approach suitable for smart buildings equipped with energy management systems that participate in ancillary services between low-voltage and medium-voltage networks. This research pertains to the domains of computer science, power engineering, and energy informatics.

Development of A 5.4 Ghz C-Band Microstrip SAR Antenna for A Tsunami Detector Chaniago, Erik; Haidi, Junas; Santosa, Hendy
Indonesian Journal of Aerospace Vol. 20 No. 2 (2022): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2022.v20.a3939

A Tsunami is a series of massive oceanic waves resulting from profound tectonic activities in the seabed. The disaster's devastating effect makes fast information delivery during a tsunami crucial in minimizing losses. For this reason, Tsunami warning systems need to be supported by a rapid detection technology. In recent years, radar has been implemented as a tsunami detector due to its sensitivity to oceanic waves. An array antenna using advanced microstrip technology, as the main component of a radar system, can fulfill the requirement for tsunami rapid detection. This paper presents the work that we conducted to develop a tsunami detection antenna using the array approach to improve gain and optimize radiation patterns. We designed a patch antenna with 12 mm in length and 21 mm in width and performed some simulations to obtain the antenna parameters such as gain, bandwidth, and optimal radiation patterns. As the results of our investigation, we determined the resonance frequency to be 5.4 GHz. The study produced a gain of 9.07 dB through simulations on an antenna that resonates at a frequency that meets the antenna work criteria, which include a loss of -26.69 dB, a VSWR of 1.09, and an HPBW (Half Power Beamwith) of 17.3°. Those values indicate that the antenna designed for tsunami detector applications functions correctly.

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