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All Journal Jurnal Teknologi AKSIOMA : Jurnal Sains Ekonomi dan Edukasi
Rahmadani, Olivia
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Law, Crime, Criminology & Criminal Justice Social Sciences

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IoT Platform for Monitoring Systems Water pH in the Freshwater Fish Cultivation Process Kurnia, Deni; Riyadi, Slamet; Dewi, Deshinta Arrova; Suprianto, Adolf Asih; Rahmadani, Olivia
Jurnal Teknologi Vol 16, No 1 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.1.11-16

Abstract

This study describes the implementation of the Internet of Things using the MQTT protocol and mosquitto as a broker combined with a 2x16 LCD for a pH monitoring system in a freshwater fish farming system at BPBIAT Purwakarta, West Java, Indonesia. To obtain accurate data, the calibration process is carried out in several stages, including using buffer 6.8 and distilled water. The calibration results on the 6.8 buffered liquid sample mean that the data obtained are appropriate, while the aquades obtained a value of 7.73, this is due to the storage factor of the distilled water so that it can change the pH value. The final result of the research shows that the data that appears online on the Node-Red dashboard is the same as that which appears locally on the 2x16 LCD. This means the MQTT protocol is working fine. The data displayed on the Node-Red UI is sent periodically every 30 minutes. The consideration is that, during the experiments, the pH value of the water did not change significantly beyond the range of 6.5-8.5. This data illustrates that the pH quality of the water for freshwater fish farming at BPBIAT is ideal for use. 
Analisis Diferensial dalam Pengambilan Keputusan Menjual Atau Memproses Lebih Lanjut Rahmi, Mega; Septiani, Nazila; Rahmadani, Olivia; Putra, Yosep Eka
AKSIOMA : Jurnal Sains Ekonomi dan Edukasi Vol. 1 No. 12 (2024): AKSIOMA : Jurnal Sains, Ekonomi dan Edukasi
Publisher : Lembaga Pendidikan dan Penelitian Manggala Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62335/mjb5vz97

Abstract

This study analyzes strategic decisions in managing a ground chili business, particularly in choosing between selling raw chilies or processing them into ground chili products. The research employs differential analysis to compare these two alternatives' revenue, costs, and contribution margins. Data were collected through interviews, direct observations, and documentation from UD Rahmad Usaha Hasil Bumi, a family-owned business operating for over two decades. The findings reveal that although the contribution margin per unit is higher for raw chili sales, the decision to further process chilies into ground chili products offers strategic advantages in product diversification and access to broader market opportunities. Break-even analysis was conducted to evaluate the business's financial feasibility, using contribution margin analysis and contribution margin ratio as key performance indicators. This study provides recommendations for business owners to prioritize product value addition as a critical factor in making business decisions.
Co-Authors Dewi, Deshinta Arrova Jayawarsa, A.A. Ketut MARIA BINTANG Mega Rahmi Putra, Yosep Eka Septiani, Nazila Slamet Riyadi