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All Journal METHOMIKA: Jurnal Manajemen Informatika & Komputerisasi Akuntansi
Nardi Nardi
Sekolah Tinggi Meteorologi Klimatologi dan Geofisika
Computer Science & IT Economics, Econometrics & Finance

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Sistem Navigasi Keselamatan Pelayaran Perairan Darat Berbasis Web Anton Widodo; I Putu Putra Wira Sarwa Yudha; Maulana Putra; Agustina Rachmawardani; Nardi Nardi
METHOMIKA: Jurnal Manajemen Informatika & Komputerisasi Akuntansi Vol. 9 No. 2 (2025): METHOMIKA: Jurnal Manajemen Informatika & Komputersisasi Akuntansi
Publisher : Universitas Methodist Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46880/jmika.Vol9No2.pp363-371

Abstract

Navigation safety in inland waters is often threatened by extreme weather conditions such as strong winds and high waves. This study developed SIGADANA, a web-based navigation system that provides early warnings of weather and water conditions in seven major ports: Ajibata, Ambarita, Balige, Muara, Simanindo, Sipinngan, and Tigaras. The system integrates real-time data with hourly temporal intervals from the OpenMeteo API, including wind speed, wind direction, temperature, and humidity, and utilises the JONSWAP model with Boussinesq corrections to estimate significant wave height (Hs) based on local topography and water depth. Furthermore, to assist the analyst team in understanding weather and water patterns in the test area, the system also stores early warning data for a five-year period, 2020-2024. SIGADANA has three main features: (1) historical monitoring of water condition trends, (2) real-time predictions for early warnings up to two hours in advance, and (3) navigation route advisories. To date, particularly in Indonesia, there has been no project estimating wave conditions prior to SIGADANA. Therefore, the system was only evaluated using OLS regression, with results showing that the model was able to explain more than 70% of the data variation. However, there are indications of residual autocorrelation and potential multicollinearity that need to be considered in the interpretation. In the future, SIGADANA is expected to improve navigation safety and has the potential to become a model for other inland waters in Indonesia.
Framework Logbook Monitoring Aset Peralatan Operasional Berbasis Blockchain untuk Optimalisasi Manajemen Aset Nardi Nardi; Mochamad Rifki Rismawan
METHOMIKA: Jurnal Manajemen Informatika & Komputerisasi Akuntansi Vol. 9 No. 2 (2025): METHOMIKA: Jurnal Manajemen Informatika & Komputersisasi Akuntansi
Publisher : Universitas Methodist Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46880/jmika.Vol9No2.pp356-362

Abstract

All equipment installed at BMKG Technical Implementation Units must be monitored in accordance with BMKG Head Regulation No. 7 of 2014. BMKG provides a web-based monitoring system called WebSIKI and a tunneling system to the BMKG Central network via VPN. However, these systems have been abandoned, and the current monitoring system at the South Tangerang Climatology Station UPT uses WhatsApp messages, email, and Google Spreadsheets to exchange data between agencies. The purpose of this research is to design a blockchain system to be implemented in the operational equipment monitoring system. The blockchain system will record monitoring data blocks and connect each previous monitoring data block that is related. The blockchain system is designed with the Hyperledger Fabric framework, the backend system is designed with Node.js using Hyperledger Fabric SDK for Node.js, and the frontend system is designed with React.js. This system was tested using the white box testing method to test the structural chaincode and black box testing to test the functionality of the system. The results of the structural and functional implementation and testing of the system show that the blockchain system is functioning properly and that the blockchain system can improve the security and integrity of equipment monitoring data.
Co-Authors Agustina Rachmawardani Anton Widodo I Putu Putra Wira Sarwa Yudha Maulana Putra Mochamad Rifki Rismawan