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Ahmad Tri Hidayat / Suhirman
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Universitas Teknologi Yogyakarta - Kampus 1. Jalan siliwangi, Jombor, Sleman, D.I. Yogyakarta
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International Journal of Engineering, Technology and Natural Sciences (IJETS)
Published by Universitas Teknologi Yogyakarta
ISSN : -     EISSN : 26853191     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Industrial & Manufacturing Engineering
Journal IJETS concern in publishing the original research articles, review articles from contributors, and the current issues related to engineering, technology and natural sciences. The main objective of IJETS is to provide a platform for the international scholars, academicians and researchers.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 10 Documents
 1 
Search results for , issue "Vol 6 No 2 (2024): International Journal of Engineering, Technology and Natural Sciences" : 10 Documents clear
The Implementation of a Body Mass Index (BMI) Calculator in an Android-Based Ideal Body Check and Nutrition Consultation Application Ardiansyah, Diky; Avianto, Donny
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 2 (2024): International Journal of Engineering, Technology and Natural Sciences
Publisher : Universitas Teknologi Yogyakarta, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46923/ijets.v6i2.366

Abstract

The rising prevalence of obesity necessitates the development of effective strategies for personalized nutritional guidance. This study aims to address common barriers to accessing nutritional advice, such as geographic distance, time constraints, and financial limitations, by introducing an innovative mobile application. The application incorporates a Body Mass Index (BMI) calculator for ideal weight estimation and a real-time online consultation feature with certified nutrition counselors. A user-centered design methodology was employed to ensure the app's usability, accessibility, and engagement. The findings reveal that the app effectively facilitates healthier lifestyle adoption by providing personalized nutritional recommendations and fostering user motivation through regular updates, reminders, and progress-tracking tools. Additionally, the application enhances community engagement by disseminating evidence-based nutritional practices at individual and societal levels. This research highlights the potential of the application as a scalable solution for bridging the gap between users and professional nutritional advice. By empowering individuals to make informed health decisions, the app contributes to obesity prevention and the promotion of a healthier society. Future studies should investigate its long-term effects on health outcomes and explore the integration of advanced features to further enhance its functionality and impact.
Emergency Service Application for Traffic Accidents in Yogyakarta Area Using Location Based Service Method Aqza Anugrah, Muhammad; Sri Utami, Wahyu
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 2 (2024): International Journal of Engineering, Technology and Natural Sciences
Publisher : Universitas Teknologi Yogyakarta, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46923/ijets.v6i2.370

Abstract

Every hour, three people die in Indonesia due to traffic accidents. This staggering toll is largely driven by human error. A dire need for immediate action insists to provide a better emergency response system before it is getting worse. This research aims to design and develop an integrated emergency application connecting users with multiple service providers, and to assess its impact on improving response times and reducing traffic accident casualties, contributing to safer urban environments and better public health outcomes. The study uses diagrams to model user interactions and system components, including police, hospitals, and firefighters. A structured framework guides the research from data collection to system implementation and testing, ensuring the system enhances emergency response times. This research reveals that the emergency application was designed to provide quick access to police, hospital, and fire fighter department services. The homepage allows users to select a service and access either a phone number list or the nearest location via Google Maps. Testing confirmed successful navigation, phone number display, and map integration in both offline and online modes. Black Box Testing showed that all core features, including menu navigation and call redirection, functioned as expected. The app is intended to enhance emergency response times by providing immediate, efficient access to critical services.
Transforming the West Sumatra Police Hall: Retrofitting Strategies for a Multifunctional Facility Sahputra, Deded Eka
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 2 (2024): International Journal of Engineering, Technology and Natural Sciences
Publisher : Universitas Teknologi Yogyakarta, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46923/ijets.v6i2.388

Abstract

The West Sumatra Regional Police Hall, initially designed as an open sports facility without a roof, is repurposed into a multifunctional center for sports activities, social events, and disaster emergency response. The existing structure, a portal frame of reinforced concrete columns and beams, requires strengthening due to budget constraints that prevent its demolition and reconstruction. This study aims to evaluate the structural performance of the building after retrofitting to accommodate additional loads, including a truss frame and roof coverings. The jacketing method is used for column retrofitting, involving an increase in cross-sectional dimensions and additional reinforcement to enhance the structure’s strength and stiffness. Structural analysis shows that the original building lacks adequate capacity to withstand internal and external loads. Post-retrofitting, the analysis demonstrates significant improvements, including reduced shear forces and bending moments in columns and beams, minimized inter-level deflections, and compliance with column interaction diagrams. These enhancements ensure the building is structurally safe, particularly against seismic hazards, and capable of fulfilling its new functions. The findings highlight the effectiveness of the jacketing method for retrofitting and its potential application in similar structural repurposing projects.
Developing Electrical System Analysis of Car Floor Vacuuming Robot Based on Dust Sensor Yahya, Wachid; Sudiro, Sudiro; Bahtiar, Hafid; Supriyadi, Slamet; Muhamad, Wan Mansor Wan
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 2 (2024): International Journal of Engineering, Technology and Natural Sciences
Publisher : Universitas Teknologi Yogyakarta, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46923/ijets.v6i2.392

Abstract

This research addresses the increasing demand for automated cleaning solutions, particularly for vehicle interiors, where traditional manual cleaning methods often prove inefficient and time-consuming. The primary aim of this study is to develop an autonomous robot vacuum cleaner capable of cleaning the floor of a vehicle by detecting dust or dirt, using a proximity sensor to avoid obstacles, and operating based on input from a dust sensor. The research follows a systematic process, including topic selection, literature review, design challenges, system design, testing, and result analysis, to evaluate the performance and limitations of the proposed system. The results of this research indicate that the robot operates effectively, with optimal movement achieved when the battery voltage ranges between 12.2V and 10.9V. Below 10.9V, the robot’s movement becomes suboptimal. The 60W vacuum cleaner on the robot successfully collects debris such as paper pieces, tissue scraps, and fine soil particles. In conclusion, this car floor vacuuming robot, based on a dust sensor, demonstrates satisfactory functionality in terms of system performance, battery life, movement, and cleaning capability. The study suggests potential for further development, particularly in enhancing technical design and integrating advanced technologies such as autonomous navigation and the Internet of Things (IoT).
Sustainable Innovation: Applying Permaculture Architecture in the Mocaf Factory Design in Banjarnegara Bahy, Fairuz Naufal; Marlina, Endy; Ratriningsih, Desrina
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 2 (2024): International Journal of Engineering, Technology and Natural Sciences
Publisher : Universitas Teknologi Yogyakarta, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46923/ijets.v6i2.395

Abstract

Banjarnegara, a district in Central Java, possesses abundant natural resources suitable for cassava farming. However, the long distribution chain and the closure of several tapioca factories have significantly reduced the economic value of cassava in the region. To address this issue, this study aims to design a sustainable Modified Cassava Flour (Mocaf) industry using permaculture principles, focusing on resource efficiency, community welfare, and environmental sustainability. Mocaf flour, derived from fermented cassava, serves as an innovative substitute for wheat flour and supports regional food security. This research employs a descriptive method, which includes literature review, site surveys to evaluate land potential and accessibility, comparative studies, and analyses based on Permaculture Architecture principles. The factory design integrates sustainable strategies such as energy efficiency, waste management, and optimal resource utilization. Key features include zoning for production, storage, and waste treatment to streamline workflows and minimize environmental impacts. Solar panels are incorporated to enhance energy efficiency, while a wastewater treatment plant (IPAL) produces biogas from fermentation waste as part of an independent energy system. The proposed factory design highlights the principles of permaculture by emphasizing sustainability, resource efficiency, and harmony with the local ecosystem. By focusing on increasing local food production and minimizing environmental degradation, the design provides a model for sustainable industrial development and supports regional economic resilience.
Designing and Developing Leak Detection Tool Prototype for Liquefied Petroleum Gas Cylinders Hambali, Ahmad; Tambun, Madschen Sia Mei Ol Siska Selvija; Kurniawan, Muhammad Ari; Triyanto, Irfan Rusydi; Ikhsan, M. Rizki
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 2 (2024): International Journal of Engineering, Technology and Natural Sciences
Publisher : Universitas Teknologi Yogyakarta, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46923/ijets.v6i2.398

Abstract

Frequent fire incidents from three kilograms Liquefied Petroleum Gas (LPG) cylinder leaks have raised concerns and criticism of the government’s gas conversion program, highlighting the need to prevent leaks caused by excessive pressure or damaged components. This study aims to design and develop a prototype tool to detect leaks in 3 kg LPG cylinders, enhancing operational safety and efficiency. The research employed an observational approach, involving direct field observations at PT Agra Budi Gas Utama SPBE. The study examined the operational processes, the application of LPG leak detection tools, and the interaction between operators and existing equipment. The research reveals that Nordic Body Map (NBM) analysis identifies moderate injury risks, with workers experiencing pain in the shoulders, hands, back, and legs due to repetitive movements, prolonged standing, and non-ergonomic workstations. Using anthropometric data of the Indonesian population (50th–95th percentiles), the design introduced key features such as a height-adjustable hydraulic jack, a conveyor system to reduce manual labor, a 60.75-liter water container for leak detection, and safety locks for improved stability. These innovations aim to minimize musculoskeletal injuries, optimize posture, and enhance productivity, with ongoing evaluation recommended for sustained workplace safety and efficiency. Indeed, the trial implementation of the prototype demonstrated its effectiveness in facilitating the detection of leaks, significantly improving the efficiency and accuracy of leak checks performed by operators.
Developing and Testing an Accountability-Centered e-Procurement Implementation Assessment Model: A Case Study of the Roads and Highways Division in Bangladesh Rashid, Md. Abdur Rashid; Shorif Uddin, Mohammad
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 2 (2024): International Journal of Engineering, Technology and Natural Sciences
Publisher : Universitas Teknologi Yogyakarta, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46923/ijets.v6i2.402

Abstract

The Government of Bangladesh has implemented statutory instructions outlined in the Public Procurement Act (PPA) 2006 and Public Procurement Rules (PPR) 2008 to enhance its public procurement system. Despite these efforts, manual tendering processes by public procurement agencies have faced persistent challenges. To address these issues, the Ministry of Planning introduced an electronic procurement (e-GP) system in 2011, guided by the e-Government Procurement (e-GP) Guideline 2011, as part of a transformative vision for public procurement. However, limited research has been conducted to evaluate the effectiveness of the e-GP system since its implementation. This study aims to identify critical factors influencing the successful implementation of e-procurement in Bangladesh, examine challenges associated with the system, and develop an efficient e-procurement implementation assessment model. Data were collected through survey questionnaires administered to 206 Public Entity (PE) officers across eleven zones of the Roads and Highways Division (RHD). The data were analyzed using SPSS software to construct a multiple linear regression (MLR) model and test eight hypotheses related to e-procurement implementation. Accountability emerged as one of the key factors, with its corresponding hypothesis (Ha) being accepted. The findings of this research provide valuable insights for academics, practitioners, policymakers, and researchers, contributing to the theoretical and practical understanding of e-procurement in public procurement systems. The study’s novel contribution lies in the development of a theoretical framework for an e-procurement implementation assessment model, which can guide future advancements and policy-making in public procurement in Bangladesh.
Designing and Developing a Plastic Bottle Shredding Device with an RFID-Based Waste Management System at Jakarta Global University Campus Arlince, Meishin; Jaenul, Ariep; Putri, Arisa Olivia
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 2 (2024): International Journal of Engineering, Technology and Natural Sciences
Publisher : Universitas Teknologi Yogyakarta, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46923/ijets.v6i2.403

Abstract

This study investigates the measurement of plastic waste, commonly found in public areas such as the Global University of Jakarta campus, using both manual and automated weighing systems. This research aims to compare the accuracy of a manual scale and an automated load cell system, with a monetary conversion of 1 gram equating to IDR.3. This research employs a Research and Development (R&D) design where experimental tests were conducted to measure plastic waste weight with both systems. The first test revealed a weight range of 6.5–9.5 grams using the load cell, compared to 6.7–9.7 grams on the manual scale. The second test showed a range of 16.5–21.1 grams for both systems, while the third test showed 31.8–36.3 grams on the load cell and 32–36.8 grams on the manual scale. The error margin between the two systems remained below 3%, indicating a high level of accuracy in the automated system. The findings demonstrate that the automated system reliably approximates manual measurements, with each gram of plastic waste valued at IDR.3. To enhance the system's performance, future research should focus on incorporating a specialized cutting mechanism for plastic bottles to reduce vibrations, optimizing load cell placement for precision, and constructing the prototype from durable materials such as stainless steel to ensure both safety and measurement accuracy. These improvements could further advance the system’s efficacy in plastic waste management.
Designing a GaN-Based 1x2 Optical Power Splitter Using Rectangular Waveguide Coupling Franata, Nauval; Ali Setyo Yudono, Muchtar; Ramadhani, Ahmad; Verlaili Erlindriyani, Ratu
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 2 (2024): International Journal of Engineering, Technology and Natural Sciences
Publisher : Universitas Teknologi Yogyakarta, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46923/ijets.v6i2.415

Abstract

The need for compact and efficient optical power splitters is becoming increasingly urgent due to the growing demand for integrated photonic devices, which are essential in fields like optical interconnects and sensing. This study addresses the issue by focusing on the design and analysis of a GaN based 1x2 optical power splitter that employs rectangular waveguide coupling. The primary aim of the research is to evaluate how the number of rectangular waveguide couplings affects the performance of the power splitter, particularly in terms of splitting angle and excess loss. To achieve this, simulations were conducted using the finite-difference time-domain (FDTD) method. The design was tested with three configurations: three, five, and seven rectangular waveguides. The research design follows a structured simulation approach, where the FDTD method was employed to explore the impact of varying the number of rectangular waveguides. The process involves systematically altering the number of coupling sections and analyzing the resulting output. The 3D optical power distribution and the optical field intensity at the splitter output for each design were examined. Additionally, the excess loss distribution over the wavelength range of 1500 nm to 1600 nm was determined, demonstrating the potential of the proposed designs for optical communication applications. This data analysis enabled the researchers to evaluate the performance of each configuration. Notably, as the number of waveguides increased, the splitting angle became wider, but this was accompanied by a rise in excess loss. These findings demonstrate the potential of the proposed design for practical applications. Future studies could explore further optimization and real-world implementation.
Innovations in Engineering for Safety: Risk Control and Occupational Health in Deep-Sea Sampling with Modified Research Equipment Nurlaela, Eli; Sudrajat, Danu; Nugraha, Erick; Nababan, Sakti Pandapotan; Choerudin, Hery; Rafith, Rafith; Saktianto, Nofendy Dwija; Gunawan Tampi, Estefanus; Derahmat, Mahardhika; Mantani, Sayuri
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 2 (2024): International Journal of Engineering, Technology and Natural Sciences
Publisher : Universitas Teknologi Yogyakarta, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46923/ijets.v6i2.417

Abstract

Occupational Health and Safety (OHS) is vital in high-risk environments, especially on research vessels conducting deep-sea sampling operations. The increased risk of accidents in maritime research requires an urgent focus on implementing specialized OHS systems. This study aims to analyze the application of OHS during deep-sea sediment sampling on the KM Madidihang 03 vessel. The research employs a descriptive design using the Hazard Identification, Risk Assessment, and Risk Control (HIRARC) method. Data were collected through direct observation during operations, utilizing modified Box Core and Gravity Core equipment for sediment collection. The hydraulic crane and tension meter were used to ensure the safe operation of these instruments. Data were analyzed to identify hazards, assess risks, and implement appropriate control measures. The results indicate that equipment failure, such as crane malfunction and cable breakage, poses the highest risk, necessitating regular equipment maintenance and safety training. The study recommends enhancing OHS procedures, including stricter supervision and crew training, to mitigate accidents and improve safety on research vessels. Future studies should focus on developing advanced safety protocols tailored to modified deep-sea research operations.

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