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Rancang Bangun Sistem IoT Berbasis Energi Hibrid untuk Pemantauan Real-Time dan Peringatan Dini Banjir Rob Pesisir Al Haris, Firdhaus Hari Saputro; Wisudawanto, Rahmat; Fathin Wahyu Lestari, Azizun
Jurnal Algoritma Vol 22 No 2 (2025): Jurnal Algoritma
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/algoritma/v.22-2.2948

Abstract

Tidal flooding is a chronic problem in the coastal areas of Semarang that requires a reliable, real-time monitoring system. This study aims to design, build, and test a prototype Internet of Things (IoT) system for tidal flood monitoring that can operate in coastal environments with limited infrastructure. The research method used is Research and Development (R&D), which includes needs analysis, system design, implementation, and experimental testing. The resulting prototype consists of an HC-SR04 ultrasonic sensor, an Arduino Nano microcontroller, and a NodeMCU ESP8266 communication module supported by a hybrid energy source of a 100-watt solar panel and a 12V 8Ah battery. The measured data is sent to the server and visualized on the web dashboard https://pasutmaritimsmg.store/dashboard.php and sent as an early warning notification via the Telegram application. The test results show that the system has a measurement accuracy of plus or minus 0.25 cm with a data delivery success rate of 98.2%. The system can operate independently for more than 5 days without sunlight. Validation with data from the Indonesian Meteorological, Climatological, and Geophysical Agency (BMKG) shows a very high correlation (R² = 0.98). It is concluded that this prototype is effective as a real-time tidal flood monitoring solution and can be further developed to support an integrated early warning system.
Analisis Customer Rating dan Customer Review terhadap Keputusan Pembelian Produk Makanan Secara Online : Studi Kasus pada Konsumen Pengguna Jasa Pesan Antar Shopee Food di Kota Solo Annisa Indah Mutiasari; Anggit Dyah Kusumastuti; Rusnandari Retno Cahyani; Firdhaus Hari Saputro Al Haris
Jurnal Simki Economic Vol 7 No 2 (2024): Volume 7 Nomor 2 Tahun 2024
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jse.v7i2.618

Abstract

The development of technology that is increasingly advanced today has led to changes in consumer behavior in buying food. The phenomenon of food delivery services through applications has made it easier for people to buy food without having to leave home. The purpose of this research is to determine the influence of customer rating and customer review variables on the purchasing decisions of food products through the Shopee Food delivery service in Solo City, Central Java. Respondents in this study are buyers who have used the food delivery service through Shopee Food, totaling 100 people. The results of the study indicate that, partially, the customer rating variable does not influence the purchasing decision, while the customer review variable affects the purchasing decision. The most dominant variable influencing this study is the customer review variable.