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Jurnal Teknik
Published by Universitas Negeri Gorontalo
ISSN : 16936191     EISSN : 27157660     DOI : https://doi.org/10.37031/jt
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Teknik (JT) is a peer-reviewed journal published by Faculty of Engineering, State University of Gorontalo. JT is published two times annually, in June and December. JT provides a place for academics, researchers, and practitioners to publish scientific articles. The scope of the articles listed in this journal is related to various topics such as Civil Engineering, Electrical Engineering, Informatics Engineering, Craft Engineering, Architecture, Industrial Engineering, Mechanical Engineering, Engineering Education, and other related engineering fields.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 142 Documents
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Evaluasi Postur Kerja Pemotongan Tahu Menggunakan Metode RULA di UMKM Handayani Devina Chalifatunnisa; Safarudin Ramdhani
Jurnal Teknik Vol 23 No 1 (2025): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v23i1.623

Abstract

MSMEs are one of the main pillars of Indonesia's economic growth, especially in the food sector. However, many production processes are still carried out manually and are not ergonomic. One such example is Mrs. Hj. Handayani's tofu MSME, where the manual tofu cutting process causes a non-ideal working posture and risks causing Musculoskeletal Disorders (MSDs). This study aims to initiate posture work using the Nordic Body Map (NBM) and Rapid Upper Limb Assessment (RULA) methods, as well as designing an ergonomic cutting tool based on a pneumatic system adapted to local anthropometric data. The evaluation was conducted on one worker through direct observation and body angle analysis using Angulus and CATIA V5 software. The initial analysis results showed an NBM score of 57 and a RULA score of 6, indicating the need for work posture improvements in the near future. After the implementation of the tool, the RULA score decreased to 2 and cutting time was reduced by 45%, proving the tool's effectiveness in improving ergonomics and work productivity in the MSME environment.
Optimasi Rute Distribusi ES Kristal Dengan Metode NN Dan LS UMKM XYZ Husin, Salmawati; Lahay, Idham Halid; Uloli, Hendra
Jurnal Teknik Vol 23 No 1 (2025): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v23i1.631

Abstract

This study aims to optimize distribution routes for Micro, Small, and Medium Enterprises (MSMEs) engaged in the production of premium ice crystals. The Nearest Neighbor (NN) method is used to find the initial route by selecting the closest locations in sequence, while Local Search is used to improve the route found by searching for better local solutions through exchange or improvement of the delivery sequence. The testing was conducted using distribution data from several customers and delivery locations. The research results show that the distribution route for UMKM Es Kristal Premium, when applying the Nearest Neighbor and Local Search methods, resulted in a reduction in delivery distance from 40.3 km to 3.74 km, with a savings of 16.28% for the urban area, and from 52.5 km to 33.1 km for the Limboto-Telaga area, with a savings of 36.95%. Additionally, this method also reduces transportation costs, with initial transportation costs of Rp. 100,000.00 decreasing to Rp. 66,840.00, representing a cost reduction of 33.16%. This method can optimize time and operational cost savings, which can have a positive impact on UMKM Es Kristal Premium in enhancing their competitiveness and service to customers.
Desain Model Pengendalian Kualitas produk Radiator berbasis Six Sigma dan Acceptance Sampling Paduloh, Paduloh; Pratama, Akbar Adjie; Salsabila, Annisa Ayu
Jurnal Teknik Vol 23 No 1 (2025): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v23i1.633

Abstract

PT KJI is a manufacturing company engaged in the production of car radiators. The quality of the products is the main focus to meet customer standards. The company faces a high Defect rate that exceeds the tolerance limit of 3%, affecting both process efficiency and customer satisfaction. This study aims to identify the root causes of product defects, calculate the sigma level, and design improvements to reduce the defect rate. The Six Sigma method with a DMAIC approach is used to analyse and control the quality of the production process, supported by the application of acceptance sampling based on AQL standards. The analysis covers the production process, inspection systems, and machine maintenance conditions. It was found that the lack of inspection on incoming materials and finished products, as well as irregular maintenance schedules, are the main factors contributing to the high defect rate. Proposed improvements include enhancing inspections of incoming and outgoing products according to AQL and implementing a more consistent machine maintenance schedule. After the implementation of the proposed improvements, there was a significant reduction in the number of Cacative products. The average sigma level increased from 3.8 to 4.7. This improvement had a positive impact on product quality, production process efficiency, and the reliability of the quality control system at PT KJI.
Pemilihan Parameter Proses Pembubutan Dalam Menentukan Kekasaran Permukaan N7 Baja ST 41 Lubis, Sobron; Kusuma , Heru Budi; Widjaya, Alvian Hartanto; Wibowo, Harry; Ken, Richard; Ariyanti, Silvi
Jurnal Teknik Vol 23 No 2 (2025): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v23i2.455

Abstract

The turning process is a machining process on a cylindrical workpiece to produce a material profile as designed. The surface of the workpiece being machined produces rough scratches. The surface roughness of the workpiece is an indicator of the quality of the resulting surface. In machine construction, the surface roughness value has been determined by the designer according to the construction needs.The manufacturing process must be capable of forming metal and producing predetermined surface roughness values. The surface roughness value of the workpiece is influenced by several factors such as cutting parameters, cutting tools, coolant system, etc. This research was conducted to determine cutting parameters, especially cutting conductivity on the resulting surface roughness value. The study was carried out using a lathe and a carbide-type cutting tool to cut ST 41 steel. The cutting parameters were cutting speeds of 200, 215, 230, 245, and 260 (m/min), feeding, and depth of cut. Before machining is carried out, the cutting possibility of N7 is determined, namely 1.6 microns, based on the design of the shaft construction. To determine the roughness value to be achieved, the turning process is carried out by varying the cutting speed, cutting pass 0.1, 0.2, and 0.3 (mm/rev), while the depth of cut is 0.5 mm. After the cutting process is carried out, the surface roughness of the workpiece is measured. From the results of observations and measurements, it was found that the parameters closest to the desired surface roughness N7 (1.6) were cutting speed (Vc) 245 (m/min), feeding (f) 0.1 (mm/rev), and depth of cut (a) 0.1 mm with a roughness value of 1.63 µm.
Analisis Usability Website Simapres Pemerintah Kabupaten Wonogiri dengan Pendekatan System Usability Scale Putra, Perdana Suteja; Brilianti, Grahita Prisca; Anugerah, Adhe Rizky
Jurnal Teknik Vol 23 No 2 (2025): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v23i2.556

Abstract

This study aims to evaluate the usability of the Simapres website of the Wonogiri Regency, which is used to manage scholarships for students from state universities in Wonogiri. Usability was assessed using the System Usability Scale (SUS) method, which includes ten statements to measure effectiveness, efficiency, and user satisfaction. The study involved 15 respondents who were scholarship recipients in Wonogiri. The results show that the Simapres website received an average SUS score of 80.3, which falls into the "Acceptable" and "Excellent" categories based on user ratings. Although the website was rated as effective and efficient, some respondents provided suggestions for improvements in features and user interface. This study provides recommendations for system improvements to enhance user experience and the quality of technology-based public services in Wonogiri.
Optimization Design of 600 Wp Solar Tree System Design According to Tilt Angle Iskandar, Handoko; Taryana, Een; Subhan, Alwan Naufal; Ramadhan, Farhan; Ramadhan, Muhammad Badai
Jurnal Teknik Vol 23 No 2 (2025): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v23i2.573

Abstract

This paper describes the design optimization of the 600 Wp Solar Tree System, with a focus on determining the optimal tilt angle. The purpose of this study is to analyze and determine the optimal tilt angle and evaluate the performance of the system in three different locations on the campus of Universitas Jenderal Achmad Yani (UNJANI). The methods used in this study include analysis of solar radiation data at 0° azimuth and different tilt angles (15° to 30°) using PVSyst. software and system performance parameters such as Solar Fraction (SF), Performance Ratio (PR), and Normalized Production. Based on the results, the optimal tilt angle is 15° with a maximum annual solar irradiation of 1912 kWh/m². Performance simulations of the three sites showed similar results, with all three sites producing the best performance with 92.66% SF and 57.76% PR. The system generated the lowest unused energy of 199.56 kWh/year. The research conducted gives important guidelines for optimizing the design of the 600 Wp Solar Tree System implemented on the collages
Perilaku Pengunjung Ruang Publik Kawasan Masjid Nurul Bahri dengan Metode Place Center Mapping Nurmiah; Karim, Febriyanti; Indriani Umar; Putri Ali
Jurnal Teknik Vol 23 No 2 (2025): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v23i2.590

Abstract

Nurul Bahri Mosque possesses strong potential as a public open space, supported by its scenic offshore coastal view that enhances the visual quality and attractiveness of the area. The mosque courtyard and surrounding open space function multifunctionally, accommodating religious, social, and recreational activities through pedestrian pathways that encourage visitor movement and interaction. However, many of these activities are not yet supported by adequate infrastructure, resulting in the suboptimal performance of the mosque courtyard’s dual role as both a place of worship and a tourism-oriented public space. This study examines the formation of activity spaces within the public open space of the Nurul Bahri Mosque by analyzing the relationship between spatial characteristics and visitor behavior. The research employs a behavioral approach using a system mapping technique, conducted objectively based on the time and spatial position of observed activities, applying Place-Centered Mapping and Person-Centered Mapping. The findings indicate that visitor behavior generates natural and context-driven activity patterns. No significant transformation of spatial dimensions is observed; however, variations in space utilization emerge across zones. Zone 2 shows distinctive activity patterns influenced by fishing activities and coastal proximity but lacks supporting street furniture, while Zone 3 accommodates core and supporting activities, including pedestrian crossings, without adequate infrastructure. These findings provide a basis for future spatial planning and facility development within the mosque area.
Analisis Faktor Teknis dalam Risiko Penyelenggaraan Proyek Bangunan Gedung Pemerintahan Sitompul, Fauzi; Carlo, Nasfryzal; Zaitul, Zaitul
Jurnal Teknik Vol 23 No 2 (2025): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v23i2.598

Abstract

The construction industry faces high uncertainty due to economic fluctuations, regulatory changes, and resource limitations. In South Tapanuli, construction projects often experience delays, budget overruns, and quality issues due to economic factors. This study aims to identify the most dominant economic risks in building construction. Using AS/NZS 4360:2004 and the Relative Importance Index (RII), this research analyzes the impact of raw material price fluctuations, delayed payments, labor wage increases, and regulatory changes. Findings indicate that raw material price fluctuations (RII: 0.948) and delayed payments (RII: 0.934) are the highest risk factors. Financial risks pose major challenges, requiring effective mitigation strategies. Recommendations include stabilizing material prices, reforming payment systems, and improving labor wage management. Proper policy implementation can enhance efficiency and project sustainability in this region.
Analisis Ketahanan Tanah berdasarkan Kecepatan Gelombang Geser (VS) di Kawasan Aliran Sungai Muara Bangkahulu Bagian Hilir, Kota Bengkulu Purwaningsih, Annisa Indah; Mase, Lindung Zalbuin; Hardiansyah; Misliniyati, Rena; Supriani, Fepy
Jurnal Teknik Vol 23 No 2 (2025): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v23i2.600

Abstract

The downstream area of the Muara Bangkahulu River is a developing area in Bengkulu City that was affected by major earthquakes in 2000 and 2007. The risk of earthquake-induced damage in this area requires further investigation, particularly regarding soil resistance to seismic shaking. This study aims to analyze soil characteristics based on shear wave velocity (VS), site classification, and Ground Amplification Factor (GAF) to support earthquake-resistant infrastructure planning. This study uses microtremor data inversion methods conducted at 38 measurement points. Shear wave velocity (VS) data at depths of 10–50 m were analyzed to determine site classes and Ground Amplification Factor (GAF). Data processing was performed using surface wave inversion techniques to map VS distribution and seismic amplification. The results of the study show that VS values at depths of 10–50 m vary between 160–960 m/s, with site class classifications dominated by categories C (hard soil) and D (medium soil). The Ground Amplification Factor (GAF) values ranged from 1.1–1.9, with areas of high amplification indicating greater vulnerability to earthquake shocks. These findings serve as an important reference for disaster mitigation planning and earthquake-resistant infrastructure development in the region. Technical recommendations are needed for locations with high amplification to minimize the risk of earthquake damage in the future.
Enhancing Heat Treatment Learning for Mechanical Engineering Students: A Comparative Study of Corrosion Inhibitor Effectiveness on Aluminium Protection Saifuddin Karim; Pradani, Yayi Febdia; Pratomo, Danang Yugo; Muhtarom, Imam; Widowati, Tamara Rahma; Wahyudi, Dian Julianto; Wulandari, Amelia Dini; Subekhi, Prido
Jurnal Teknik Vol 23 No 2 (2025): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v23i2.650

Abstract

Corrosion still remains a serious problem in the application of aluminum alloys, such as Aluminum 6061, which is one of the most widely used aluminum alloys in industries because of its high strength-to-weight ratio. However, the material degrades when exposed to aggressive environments, such as acidic, alkaline, or salty solutions, and the control of corrosion has been achieved with the use of synthetic chemical inhibitors, but the increasing concern of environmental and health risks has shifted attention to more eco-friendly alternatives. The present study aimed at evaluating the efficacy of three vegetable oils (coconut oil, palm oil, and soybean oil) as environmentally friendly corrosion inhibitors for Aluminum 6061, and the alloy coupons were subjected to three different corrosive solutions (hydrochloric acid, sodium hydroxide, and sodium chloride). A quantitative experimental procedure was employed to determine the corrosion rate through the measurement of the weight loss of aluminum coupons prior to and after the immersion, and the results showed that all three oils were able to reduce the corrosion rate when compared to the samples without any inhibitor. Among them, coconut oil gave the best protection, followed by soybean oil and palm oil, because the adsorption of the organic compounds and fatty acids in the oils onto the aluminum surface formed a thin layer that separated the metal and the corrosive environment. Consequently, the results also showed that the use of bio-based oils can be a promising alternative to synthetic corrosion inhibitors in industries that use aluminumbased materials.

Page 13 of 15 | Total Record : 142

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