Jurnal Ilmiah Giga

Rancang Bangun dan Studi Kelayakan Mesin Peniris Minyak pada Industri Kecil Makanan Ringan

Andrea Nende Ardiana — 2026-07-15

The high oil content in chips caused by manual draining reduces product quality and production efficiency at Aneka Keripik Ora Umum, a small-scale food industry in Gunungpati, Semarang. Therefore, the implementation of a more efficient and ergonomic machine is required. This study aims to design an oil spinner machine and evaluate its technical and economic feasibility to support the modernization of small-scale production equipment. Anthropometric measurements of 10 employees showed shoulder width, finger width, hand reach, standing elbow height, and popliteal height values of 39.7cm, 6.87cm, 77cm, 99.2cm, and 40.49cm, respectively. The data met both adequacy and uniformity test requirements and were used as the basis for machine design. The machine dimensions were determined using the 50th percentile to accommodate the majority of workers and utilized SS304 stainless steel due to its mechanical strength, corrosion resistance, and compliance with food hygiene standards. The designed machine is projected to increase production capacity from 6 kg/day to approximately 10kg/day. Economic analysis using the Break-Even Point (BEP) method resulted in a BEP value of 21.35kg/month, with an investment cost of IDR 8,000,000 and fixed costs of IDR 320,333 per month. Therefore, the machine is considered technically and economically feasible for implementation.

Perancangan dan Implementasi Sistem Antropometri Bayi Multi-Sensor Berbasis ESP32-S3 Terintegrasi IoT

Alief Fadhillah — 2026-07-15

Routine anthropometric monitoring is standard practice for early detection of growth disorders in infants, and is complemented in this study by body temperature monitoring as a fever indicator. Conventional approaches using separate instruments for weight, body length, and body temperature are time-consuming and susceptible to transcription errors, particularly in high-volume posyandu settings. This study developed an integrated infant anthropometric measurement device based on the ESP32-S3 microcontroller, combining a 20 kg load cell with an HX711 amplifier for weight, an HC-SR04 ultrasonic sensor for body length, and a DS18B20 sensor for axillary temperature. Measurement data are entered via USB keyboard, shown on an LCD, and automatically transmitted to Google Spreadsheet via HTTP GET to Google Apps Script. The device computes weight-for-age, length-for-age, and BMI-for-age z-scores per Ministry of Health Regulation No. 2 of 2020. Accuracy testing over 100, 90, and 10 trials for weight, length, and temperature yielded a 93% accuracy rate within ±0.1 kg, length accuracy ≥90% at every point across 0–80 cm (90 trials total), and a maximum temperature deviation of 0.1°C. Integrated testing on two healthy infants aged 2 and 12 months produced results consistent with WHO reference medians, with cloud transmission completed within 1–2 seconds per session.

Deteksi Akuifer Air Tanah menggunakan Metode Geofisika Tahanan Jenis Konfigurasi Schlumberger di Desa Mangsit, Lombok Barat

Melinda Dwi Erintina — 2026-07-15

This study aims to detect groundwater aquifer layers using resistivity methods with Schlumberger configuration in Mangsit Village, West Lombok. This area is located on the coast and serves as a tourism destination. Aquifer layers are layers capable of storing and flowing groundwater, so the existence of this layer is very important to explore. Field data acquisition was carried out using 3 sounding measurement points, VES 1, VES 2, and VES 3. The measurement length used was 500 meters. The field measurement data were then processed using IP2WIN software to obtain 1-dimensional resistivity log data. The log data were then interpreted into several subsurface rock layers. The interpretation results indicate the potential for groundwater aquifers at a depth of 46-131 meters at measurement point 1 (VES 1). At measurement point 2 (VES 2) the aquifer layer was identified at a depth of 45-127 meters. At measurement point 3 (VES 3) the aquifer layer was identified at a depth of 42-107 meters. The aquifer layer was identified as lapilli tuff rock. This rock can be a fairly good aquifer because it can store groundwater. The results of the study indicate that the Schlumberger configuration resistivity method can identify aquifer layers accurately and efficiently. These results are expected to be used as recommendations to local governments in exploiting groundwater so that water resources can be properly managed based on resistivity data.

Analisis Alterasi dan Mineralisasi pada Endapan Bijih di Daerah Reboya, Kecamatan Taliwang, Kabupaten Sumbawa Barat

Aji Syailendra Ubaidillah — 2026-07-15

Sumbawa Island is the part of a magmatic arc system with significant potential for sulfide mineralization. This study aims to identify the characteristics of hydrothermal alteration, mineralization, and the type of hydrothermal deposit occurring at Mount Reboya, Telaga Bertong Village, Taliwang District, West Sumbawa Regency. The research methods included geological field observations, rock sampling, and megascopic and petrographic analyses. The results reveal the presence of alteration minerals, including plagioclase, K-feldspar, quartz, biotite, hornblende, and clay minerals, which are associated with argillic, advanced argillic, silicification, and potassic alteration types. Ore minerals identified in the study area consist of pyrite, chalcopyrite, sphalerite, and galena. Based on the mineral assemblages and alteration characteristics, the hydrothermal deposits developed in the study area are interpreted to be of epithermal and hypothermal types. This study provides insights into the hydrothermal processes that have affected the area and offers a scientific basis for further mineral exploration activities.