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INDONESIA
FaST : Jurnal Sains dan Teknologi
Published by Universitas Pelita Harapan
ISSN : -     EISSN : 25989596     DOI : -
Core Subject : Science, Social,
Computer Science & IT Environmental Science
Started in 2017, FaST publishes articles in the areas of science and technology, particularly in food technology, biology, electrical engineering, industrial engineering, mathematics and civil engineering. Articles are either reviews and/or research results.
Arjuna Subject : -
Articles 384 Documents
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Design of a Two-Point Temperature Monitoring System on a Heating Medium Based on Arduino Mega 2560 and IoT Anggara, Nataly Wisnu; Rhizma, Mario Gracio Anduinta
FaST : Jurnal Sains dan Teknologi Vol. 10 No. 1 (2026): MAY
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/fastjst.v10i1.10897

Abstract

This research aims to design a two-point temperature monitoring system using 2 DS18B20 sensors on a heating medium using DS18B20 sensors controlled by an Arduino Mega 2560 and integrated with Internet of Things (IoT) technology. The measured data are processed by the microcontroller and transmitted via the ESP8266 module to the Firebase platform, then displayed on a smartphone application and recorded as historical data. The experimental results show that the DS18B20 sensors are able to read temperature changes linearly within the tested temperature range of approximately 27°C to 67°C and can follow the temperature increase trend of the heating medium. To improve measurement accuracy, calibration was performed using a linear regression method with a surface thermocouple as the reference instrument. After calibration, the measurement error was significantly reduced to 2.90% at the upper measurement point and 2.66% at the lower measurement point, indicating that the system is more representative for monitoring temperature changes at two measurement locations. The proposed demonstrates decent performance as an IoT-based temperature monitoring prototype, making it suitable for small-scale heating applications and educational purposes.
Assessment of Rainwater Quality from Rainwater Storage in Ende, East Nusa Tenggara Province, Indonesia Nggae, Yohanes Erik Kurniawan; Supraba, Intan; Triatmadja, Radianta
FaST : Jurnal Sains dan Teknologi Vol. 10 No. 1 (2026): MAY
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/fastjst.v10i1.10932

Abstract

Using rainwater as an alternative water source requires careful attention to its quality, particularly in simple storage systems. This study aims to analyze changes in the physical, chemical, and microbiological quality of rainwater stored in a tank over a specified period, as well as the effects of maintenance practices on rainwater harvesting systems. The research methodology involved collecting samples of untreated rainwater and rainwater stored in a tank over four weeks. Physical parameters analyzed included color, turbidity, and total dissolved solids (TDS); chemical parameters included pH; and microbiological parameters included total coliforms and Escherichia coli. The results indicate that poor roof surface and gutter system cleanliness led to increased turbidity and noticeable changes in rainwater color. Following roof and gutter cleaning, improvements in the physical quality of the stored rainwater were observed. However, an anomaly in turbidity occurred during the third week, reaching 52 NTU. TDS values decreased throughout the storage period, while the pH of the rainwater remained within a neutral range. From a microbiological perspective, the concentrations of total coliforms and E. coli decreased significantly over the storage period, presumably due to limited nutrient availability and unfavourable environmental conditions for bacterial growth. The boiling process was effective in reducing bacterial concentrations; however, total coliforms and E. coli were still detected at levels of 11 CFU/100 mL and 4.4 CFU/100 mL, respectively. These findings demonstrate that stored rainwater requires further treatment prior to use, particularly for potable purposes.
Pemanfaatan Probiotik Lactobacillus casei dan Lactobacillus plantarum dalam Yoghurt Berbasis Susu Kacang Arab (Cicer Arietinum L.) dengan Perendaman Natrium Bikarbonat dan Penambahan Stevia Prananto, Jennifer Felicia; Parhusip, Dr. Adolf J.N.
FaST : Jurnal Sains dan Teknologi Vol. 10 No. 1 (2026): MAY
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/fastjst.v10i1.10960

Abstract

Yogurt is a functional food product rich in probiotics and plays a vital role in maintaining digestive health and the immune system. Animal-based yogurt contains lactose and cholesterol, making it unsuitable for those with lactose intolerance. Therefore, lactose-free, high-protein, and nutrient-rich chickpea milk can be an alternative ingredient for plant-based yogurt. However, chickpea yogurt has quite an unpleasant taste and aroma, as well as a bitter aftertaste due to phenolic compounds and lipoxygenase enzyme activity. This study aims to develop chickpea milk yogurt with optimal sensory and nutritional quality by soaking chickpeas in sodium bicarbonate solution (0, 1, 2, 3%; 8, 16, 24 hours), adding stevia (0.044, 0.088, 0.133%) as a low-calorie sweetener, and using a combination of probiotics Lactobacillus casei and Lactobacillus plantarum (1:0, 2:1, 1:1, 1:2, 0:1) to support fermentation and yogurt stability. The results of the analysis showed that variations in the ratio of bacteria and stevia concentration significantly affected pH, total lactic acid, total LAB, total sugar, and protein, with a formulation of a 1:1 bacterial ratio and 0.088% stevia providing a pH of 4.1±0.04, protein 6.1±0.04%, lactic acid 0.96±0.01%, total sugar 1.65±0.00%, good fermentation efficiency, high LAB viability (9.27±0.04 log CFU/ml), and the highest sensory acceptance. This combination is recommended as the best formulation for chickpea milk yogurt with optimal chemical, microbiological, and sensory qualities
Rancang Bangun Aplikasi Urun Dana Berbasis Website Untuk Membeli Dan Membagikan Hasil Panen Petani Kepada Masyarakat Pra-Sejahtera As-subhy, M. Rikza; Junita, Junita; Pardede, Marincan
FaST : Jurnal Sains dan Teknologi Vol. 10 No. 1 (2026): MAY
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/fastjst.v10i1.11083

Abstract

The Indonesian agricultural sector faces structural problems such as low selling prices, instability in the income of small-scale farmers, waste of harvests, and food insecurity among underprivileged communities. This study developed Bagipanen, a web- and Android-based crowdfunding application that integrates a socialfunding model with a mechanism for selling harvests on consignment. The system is designed to connect farmers as commodity providers, donors as funding supporters, and underprivileged communities as beneficiaries. Technically, the application is built using Laravel for the web platform and Flutter for the mobile platform, and is integrated with the Midtrans payment gateway. The research methodology focuses on software engineering with the application of testing through 25 test scenarios covering unit, integration, end-to-end (E2E) testing using Laravel Dusk, performance, and security, with a success rate of 100%. E2E testing results showed an average execution time of 5.35 seconds per scenario, while payment integration testing showed a failure rate of 0%, an average response time of 320 ms, and successful handling of idempotent callbacks. Performance testing recorded a throughput of 33.96 requests/second with a maximum response time of 850 ms at peak load. Software quality analysis showed 87.8% test coverage, 2.3% code duplication, and no critical security vulnerabilities were found.

Page 39 of 39 | Total Record : 384

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