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G-Tech : Jurnal Teknologi Terapan
Published by Universitas Islam Raden Rahmat Malang
ISSN : 25808737     EISSN : 2623064X     DOI : -
Core Subject : Science, Engineering,
Computer Science & IT Decision Sciences, Operations Research & Management Energy Engineering
Jurnal G-Tech bertujuan untuk mempublikasikan hasil penelitian asli dan review hasil penelitian tentang teknologi dan terapan pada ruang lingkup keteknikan meliputi teknik mesin, teknik elektro, teknik informatika, sistem informasi, agroteknologi, dll.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 897 Documents
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Development and Quality of Rica-Rica as Indonesian Traditional Food: A Narrative Review Nur Agustin Mardiana; Nur Aini Mahmudah; David Kurniawan; Anang Widigdyo; Aditya Wirawantoro Putra; Panji Purnomo
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8705

Abstract

This narrative review explores rica-rica, a traditional North Sulawesi spicy dish, examining its historical roots, production process, and contemporary adaptations. Literature searches were conducted from January to August 2025 across major databases (PubMed/MEDLINE, Scopus, Web of Science, Google Scholar) and Indonesian repositories (Garuda Portal, Indonesian Publication Index), yielding 48 relevant sources. Rica-rica, characterized by intense chili heat, holds philosophical significance for Minahasan people who liken spiciness to life's inevitable challenges. The preparation involves grinding and sautéing spices, then cooking with various meats including poultry, mammals, seafood, and game animals. Meat selection significantly affects nutritional content, with protein ranging from 12.1% (broiler chicken) to 82.96% (dried snails). Game meat consumption, culturally valued by Minahasans, poses health risks from potential microbial contamination, viruses, and zoonotic diseases. Modern innovations such as instant seasonings, frozen products, and canned rica-rica, address contemporary demands while preserving culinary heritage. Although rica-rica offers culinary, cultural, and nutritional value, hygienic processing and safe ingredient selection are crucial to minimize consumer health risks. Future research should focus on empirical nutritional analysis, microbiological risk assessment along supply chains, and consumer acceptance studies of sustainable meat alternatives.
Encapsulation of Purple Sweet Potato Anthocyanins Using Alginate and Pectin as Natural Food Colorants Husnul Hatimah; Amran Laga; Rizki Aristyarini; Ardi Manggala Putra
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8714

Abstract

The use of non-food dyes is a problem in food safety. One of the efforts to solve this problem is the making of natural coloring products from purple sweet potato anthocyanin pigments. Anthocyanins are sensitive to oxidative damage, so encapsulation techniques need to be used to preserve bioactive compounds. Encapsulation with the coacervation method involves coating anthocyanins as the active ingredient with pectin and alginate as gel matrices, based on the principle of ionic gel formation. This study aimed to determine the optimal alginate concentration for the formation of anthocyanin encapsulates and to identify the color characteristics and interactions of the encapsulated anthocyanins from purple sweet potato. This study used various concentrations of alginate (0%, 0.5%, 1%, and 1.5%). The research parameters used were total anthocyanin and antioxidant activity (IC50). The findings indicated that the optimal concentration of alginate for preserving the solubility and stability of anthocyanin, derived from the bioactive compounds in purple sweet potatoes, was 1% alginate. This concentration resulted in a total anthocyanin content of 20.77 mg/L and an antioxidant activity (IC50) of 4049.73 ppm. A higher alginate concentration results in stronger gel formation; however, it simultaneously weakens the ability of alginate to bind anthocyanin as an active ingredient. This is attributed to the increase in viscosity, making the incorporation of the anthocyanin matrix into the encapsulates more difficult. Despite the very weak antioxidant activity, these anthocyanin encapsulates hold potential as natural food colorants for safe applications in acidic food products like beverages.
Root-Cause Investigation and Technical Reliability Analysis of the Starting-Air System Failure in a Marine Generator A Case Study of KM Sabuk Nusantara 101 Gaspar Pereira Maia Pinto
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8716

Abstract

The starting-air system of the 114-kW main generator aboard KM Sabuk Nusantara 101 experienced repeated start failures during a 14-day sea operation, resulting in delayed engine activation and reliability reduction. This study aims to identify the root causes of the failure and evaluate the system’s technical reliability performance. The investigation employed field observation, pressure measurement, functional testing, fault tracing, and logbook analysis, supported by Root-Cause Analysis (RCA) and reliability metrics (MTBF, MTTR, and failure rate). The results show three dominant failure sources: (1) air receiver leakage due to degraded flange seals, (2) solenoid valve contamination causing pilot pressure loss, and (3) starting-air valve seat wear leading to insufficient cylinder impulse pressure. Reliability calculation produced an MTBF of 112 hours, MTTR of 2.5 hours, and a failure rate of 0.00893 h⁻¹, indicating low operational reliability despite 97.8% availability. The findings conclude that the system failure is dominated by leakage, contamination, and single-point failures (SPF) in the pneumatic control circuit. Preventive actions recommended include condition-based monitoring, improved sealing and filtration, functional inspection intervals every 250 hours, and redundancy for critical pneumatic components. These measures are expected to increase operational readiness and reduce downtime on similar shipboard installations.
Mapping Plant Biotechnology Research for Low Heavy Metal Accumulation and Crop Safety: A Bibliometric–SLR Study Highlighting CRISPR-Cas9 Nur Meili Zakiyah; Bella Rhea Lavifa Sanjaya; Sutini Sutini
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8732

Abstract

Heavy metal contamination in agriculture presents a growing risk to food security, underscoring the need for precise and scalable biotechnological solutions. This study maps the research landscape of plant biotechnology for reducing heavy metal accumulation using an integrated bibliometric analysis (Bibliometrix/Biblioshiny and VOSviewer) combined with a PRISMA-based SLR of 43 English-language empirical articles published between 1997 and 2025. The analysis identifies four major thematic clusters: tolerance mechanisms, field applications, multi-omics, and genome editing that indicating a shift from early physiological studies toward precision biotechnology. The focused SLR reveals that CRISPR-Cas9, although still limited in publication volume, has emerged as a strategically positioned research front, particularly in recent crop-focused genome-editing studies involving agriculturally relevant species. Geographical patterns show strong research productivity in Asia and high scientific influence in Western countries. Despite the modest dataset, this study provides a strategic roadmap for prioritizing CRISPR applications, strengthening interdisciplinary integration, and accelerating biotechnology-based solutions for food safety and sustainable agriculture.
Exploration of BIM Automatic Quantity Take Off for Contractor on Bridge Structural Model Vendie Abma; Tri Nugroho Sulistyantoro; Fitri Nugraheni
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8735

Abstract

The implementation of Building Information Modelling (BIM) in Indonesia’s construction industry has grown steadily, but it mainly focuses on the planning stage. One important function of BIM, automated quantity take-off (QTO), has great potential benefits for contractors during the construction phase. However, its use often faces challenges due to poor model quality. This study explores the implementation of BIM-based automated QTO in a bridge construction project to support digital construction practices from a contractor’s viewpoint. A structured modeling approach that follows Level of Development (LOD) 350 was used to improve model quality, ensure data consistency, and allow reliable quantity extraction and shop drawing generation within the BIM environment. The QTO results for the concrete and reinforcement materials in this analysis showed a total concrete volume of 2,075.30 m³, and the reinforcement volume was 381,548.21 kg. The findings also highlight the need to align modeling practices with the requirements of the construction phase to fully take advantage of BIM. Overall, BIM-based automated QTO can enhance construction performance, reduce material waste, and improve contractor decision-making, providing evidence to support broader industry adoption and informing future guidelines and policy initiatives for digital construction in Indonesia.
Web Application Review of Goods and Services for Reviewer Module Marchiningrum, Anranur Uwaisy; Budiawan, Reza; Pradithae , Villy Satria; Prayogo, Ario Harry
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8742

Abstract

Online reviews of goods and services are essential in supporting informed consumer decision-making; however, user participation in review activities in Indonesia remains limited, resulting in fragmented and less credible information. This study aims to design and develop a web-based social application, namely the Reviewing Goods and Services Web Application (RIPIU), focusing on the reviewer module to support structured, interactive, and experience-based reviews. The application was developed using the Software Development Life Cycle (SDLC) with the waterfall model, including needs analysis, system design, implementation, and functional testing. Data collection was conducted through interviews, questionnaires, and comparative analysis of existing review platforms. The results indicate that the reviewer module was successfully implemented with key features such as review creation and management, goods and services search, question-and-answer interaction, profile customization, and a reward mechanism for active reviewers. Black box testing confirms that all system functionalities operate according to specified requirements. This research contributes an applied web-based review system that enhances user engagement and provides comprehensive product and service information, supporting the practical implementation of social-based information systems in the e-commerce domain.
Constructing Eight Smart Building–Safety Dimensions Through PRISMA Mapping and Fuzzy Mamdani Evaluation Adwitya Bhaskara; Fitri Nugraheni; Sri Kusumadewi
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8752

Abstract

The integration of smart buildings and Internet of Things (IoT)–based safety systems is becoming increasingly important in response to the growing demand for intelligent, safe, and responsive buildings. However, prior studies predominantly focus on technological performance or isolated safety applications, with limited attention to structured readiness mapping at the dimensional level. Addressing this gap, this study proposes a novel eight-dimensional smart building–safety readiness model by integrating a PRISMA 2020–guided systematic literature review (SLR), concept mapping, and Fuzzy Mamdani evaluation. The SLR resulted in five key articles that underpin eight core dimensions: Building Management, Automation and Control, IoT Connectivity, Decision Analytics, Adaptive Response, Safety and Maintenance, Energy and Sustainability, and Automation Dominance. The Fuzzy Mamdani analysis was applied to 23 validated readiness indicators and showed that all dimensions fall within the Average category, with fuzzy values ranging from 54 to 61. These findings indicate that the readiness level for implementing smart building–safety in Indonesia is at a stable intermediate stage, with no dimension lagging significantly behind. Practically, the proposed dimensional model can support policymakers in prioritizing regulatory focus, assist building practitioners in identifying readiness gaps, and provide researchers with a structured framework for advancing smart building–safety integration.
The Effect of Service Quality and Passenger Satisfaction on Bus Passenger Loyalty Tawang Alun Terminal Using the Structural Equation Modeling Faqih Zulham Nawwaf; Hera Widyastuti
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8770

Abstract

Transportation maintains a vital role in enabling trade and mobility, which significantly contributes to regional economic growth. Therefore, this study used Partial Least Square Structural Equation Modeling was chosen because it can analyze the causal relationship between latent variables simultaneously, while PLS-SEM was preferred because it focuses on prediction, is tolerant of normality assumptions, and is suitable for complex models with survey data. A purposive sampling technique was used and 250 data were collected through on-site survey. All manifest variables proved both valid and reliable. The variable of passenger satisfaction was shown to be low, with an R² value of 0.046, indicating that the ability of the construct or model to explain the satisfaction is very weak and almost negligible. In contrast, the loyalty variable, achieved a high R² of 0.911 which is included in the very strong category. This result shows that the model can explain 91.1% of the variance in loyalty, indicating that the model’s variables are excellent at predicting loyalty and have a high explanatory power. These results provide actionable insights for terminal administration and transport policy, highlighting the necessity to enhance service characteristics that directly improve traveler satisfaction to maintain passenger allegiance.
Development of an E-Commerce Website for Marketing Handicrafts and Carvings Unique to Sikka Using the Agile Software Development Method as an Effort to Enhance the Local Creative Economy Lindiana Ermilinda; Yuliana Anggreani Dua Delang Kolit; Katarina Trisanta Coo
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8780

Abstract

The need for digital marketing for local artisans in Sikka Regency is increasing, requiring the development of an e-commerce system to expand market reach and support online product promotion. This study aims to design and build an e-commerce website as a digital marketing medium for artisans. The system development was carried out using the Agile Software Development method, with implementation using the CodeIgniter framework, PHP programming language, MySQL database, and interface design based on HTML, CSS, and Bootstrap. Functional testing was carried out using blackbox testing, while usability evaluation was conducted through user experience (UX) testing. The results of the study show that all the main features work according to user needs and are considered easy to use, with a clear display and fast system response. The system was successfully deployed and used by artisans as a digital marketing medium. Maintenance is carried out iteratively to support the sustainability of the system's use. Overall, the user satisfaction test results showed a positive satisfaction level of 98% for the developed system.
Designing a Product Storage System to Reduce the Number of Damaged and Expired Products at Alfa Omega Twin's Supermarket Angela Reschyta Putri; Fransiska Hernina Puspitasari
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8797

Abstract

Good product storage systems in the warehouse affect product quality. The Alfa Omega Twin supermarket has a problem with damaged and expired products in total 46 units, resulting in a total loss of Rp559,500.00. After observation, the cause was found to be the haphazard placement of products and the absence of storage procedures. Thus, the research aims to reduce the number of damaged and expired products, also total losses. Due to the large number of products, ABC classification was used to categorize them. This classification will be used as the basis for designing a layout using class-based storage. Once the layout created, a storage standards using FIFO equipped with Standard Operating Procedures (SOP) was made. Based on the implementation results, the number of damaged and expired products decreased to nine and the total loss was Rp80,900.00. Employing both strategies through the storage arrangement and procedure, which is the distinction from other research can effectively address the problems. Practical tips on storage system that have been focused on those two strategies will assist a retail manager to keep the warehouse neat dan more organized.

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