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Ahmad Tri Hidayat / Suhirman
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ijets@uty.ac.id
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ijets@uty.ac.id
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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 1 (2024): International Journal of Engineering, Technology and Natural Sciences" : 10 Documents clear
The Relation between Flow Map Analysis and Residential Density Conditions in Sleman Regency, Special Region of Yogyakarta Trimarstuti, Jeki; Tulus Wahyuhana, Ratika; Hyun Kim, Ji
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 1 (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.v6i1.277

Abstract

The government of Sleman Regency has been actively implementing the Smart Living concept within the Smart Regency framework where its key achievements include developing type C terminal facilities, creating a transport licensing management information system, and collecting data on public transport modes and routes. However, complete access and integration of public transportation with all government facilities, such as hospitals, schools, and offices, remain unrealized. Thus, this research examines the relationship between flow map analysis and residential density in Sleman Regency, based on data from local residents, to address these integration challenges. The analysis was conducted using quantitative methods, especially ArcGIS. Research data were collected through interviews, questionnaire distribution, and observation throughout the regency. The results showed that the current form of movement patterns originates from residential areas with a high density (in terms of population), which has been visualized using flow map analysis and tends to determine no relationship between the daily movement patterns and the residential density conditions. It is because the current form of movement patterns in high-density areas, which are based on the respondent's preferences of transportation mode, has yet to be served well by existing urban bus services. Therefore, the tendency to choose the location of a residential area is independent of the absence or availability of public transportation itself. In the future, all of the unserviced areas should be part of the government's concern so that the idea of connected communities can be implemented and the idealization of the Smart Living concept in Sleman Regency.
The Effect of Sodium Silicate (Na2SiO3) Addition against Water Absorption and Compressive Strength in Bricks Ridha, Abdi
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 1 (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.v6i1.283

Abstract

This study investigates the impact of Sodium Silicate (Na₂SiO₃) addition on the water absorption and compressive strength of bricks, aiming to enhance understanding of material properties in construction. Sodium Silicate was incorporated into the brick mix at concentrations of 0%, 10%, 20%, and 30% by weight of cement, with a mix ratio of 1:7 (cement). The compressive strength and water absorption tests were conducted after a 28-day curing period, following the Indonesian National Standard (SNI) procedure 03-0349-1989. The results indicate that increasing Sodium Silicate concentration led to a decrease in compressive strength, with values of 45.62 MPa, 50.27 MPa, and 59.03 MPa observed at 10%, 20%, and 30% addition levels, respectively, compared to the control (standard bricks). Conversely, water absorption increased by 0.79%, 1.47%, and 2.31% at these respective concentrations. The observed reduction in compressive strength is attributed to the gel-like and adhesive properties of Sodium Silicate, which potentially hinder uniform water distribution within the brick matrix, thereby affecting the overall material performance. These findings suggest that while Sodium Silicate can enhance water resistance in bricks, its use at higher concentrations may compromise structural integrity. Further research is recommended to optimize the concentration of Sodium Silicate for balanced mechanical properties and durability in brick production.
Prototype Design Remote Smart Car 4WD Robot Car with Additional Power Photovoltaic Source Integrated Arduino Aldhi, Muhammad; Satria, Habib; Mungkin, Moranain; Dayana, Indri; Salam, Rudi
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 1 (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.v6i1.291

Abstract

The problem addressed in this research is designing an Electric Car Prototype, a technology design using Arduino Uno, L298N Driver Module, and HC-06 Bluetooth sensor which is controlled automatically using an application. The method used is a hybrid PLTS (Solar Power Plant) system based on Arduino Uno. This prototype combines electrical energy from batteries with solar energy produced by solar panels, and the main controller is Arduino Uno. Tests were carried out to evaluate the performance and efficiency of this electric car. The results of solar panel experiments in designing electric car prototypes, testing will be carried out on the efficiency of solar panels on the power produced. The following is the data from the experimental results measured through the following table 2 experiments. solar panels were installed on the roof or other parts exposed to sunlight on a prototype electric car. Solar panels consist of photovoltaic solar cells which are capable of converting solar energy into electrical energy. When sunlight falls on a solar panel, the solar cell produces an electric current. The electric current generated from the solar cell is then channeled to the charging module to charge the battery. The battery charging module regulates the voltage and electric current according to battery charging needs. This is important so that the battery does not receive too much or too little power during the charging process. After passing through the battery charging module, the electrical energy from the solar panels is used to charge the electric car battery. Electric car batteries function as energy storage which is used to control the engine and other electronic systems in the car. Obtained were the development of an environmentally friendly and sustainable electric vehicle.
Designing of a Shell and Tube Heat Exchanger for Methyl Chloride Production Nurhaliza, Amanda; Bayu Dani Nandiyanto, Asep
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 1 (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.v6i1.310

Abstract

This study focuses on the design and performance analysis of a shell-and-tube heat exchanger engineered explicitly for effectively handling methyl chloride in industrial applications. While the application of heat exchangers in various industrial processes is well-documented, methyl chloride’s distinct chemical and physical properties necessitate a specialized design approach. This research begins with a thorough review of existing literature and prior designs to identify the key considerations and challenges in developing an optimized heat exchanger for methyl chloride. The design process adheres to the standards set forth by the Tubular Exchanger Manufacturers Association (TEMA), ensuring compliance with established dimensional specifications. Critical parameters related to the working fluid are meticulously defined and evaluated. Performance analysis is conducted through manual calculations, facilitated by Microsoft Excel, to assess the heat exchanger’s operational efficiency. The results indicate that the designed heat exchanger meets and exceeds the required standards, featuring 85 tubes and an effectiveness value exceeding 75%. The high effectiveness value underscores the heat exchanger’s robust operational performance. It is a reliable component for industrial processes involving methyl chloride.
Integrated Approach to Flood Risk Management: A Comprehensive Thematic Review in the Malaysia Context Saad, Mohammad Syamsyul Hairi; Ali, Mohamad Idris; Razi, Putri Zulaiha; Ramli, Noram Irwan; Bawono, Adi Setiabudi
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 1 (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.v6i1.337

Abstract

This research addresses a need in the literature on flood risk management in Malaysia, particularly as it relates to development projects. Understanding and improving risk management strategies is crucial as Malaysian floods increase. A thematic literature review was used to search relevant 2018–2023 literature. It exhaustively searched scholarly databases, and government, and international organization reports. Multi-thematic analysis was used to understand the flood risk management narrative. The study shows that Malaysian flood risk management strategies need a more holistic and integrated approach. The development of an integrated framework is a significant step forward because it allows for the better coordination of developmental project initiatives with strategies meant to mitigate and manage flood risks. Effective collaboration between the federal government, Malaysian local authorities, urban planners, developers, and construction firms is crucial. Effective flood management requires accurate risk assessment by consultants, developers, and local authorities to integrate current and future development projects in flood-prone areas. Project development requires strategy, overview, and flood risk assessment in planning permission can produce creative and secure results.
Sentiment Analysis of Bali Calendar Application Reviews using K-Nearest Neighbour Kumalasanti, Rosaliaarum; Dina Aprilianti, Ni Made
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 1 (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.v6i1.339

Abstract

This study evaluates user sentiment towards the Bali Calendar application, analysing both positive feedback and negative critiques. The research employs the K-Nearest Neighbour (KNN) algorithm to classify sentiments as either positive or negative, aiming to assess overall public satisfaction with the app. To improve classification performance, the Tomek Links technique is applied in conjunction with KNN. The study categorizes data into pre- and post-COVID periods to address the observed increase in negative reviews following app updates during the pandemic. In the pre-COVID phase, KNN achieved accuracy rates of 93.7% and 94.3% with and without Tomek Links, respectively, using parameter values K=5 and K=3. In the post-COVID period, accuracy rates were 86.0% and 87.2% with and without Tomek Links, respectively, using parameter K=9. The application of Tomek Links resulted in a notable accuracy improvement of 1.2% in the post-COVID data compared to a 0.6% increase in the pre-COVID data. This finding highlights the significant role of Tomek Links in enhancing KNN accuracy, particularly when dealing with unbalanced datasets. The study demonstrates that while KNN performs robustly, Tomek Links can provide a substantial boost in classification accuracy, especially in scenarios with skewed data distributions.
Food Distribution Models to Determine Distribution Routes, Distances and Costs Syaina Ulfa, Azhara; Winarno, Heru
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 1 (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.v6i1.344

Abstract

The agricultural sector is vital to Indonesia’s economy, requiring continuous development to address population growth and technological advancements for increased agricultural production. A persistent challenge lies in the uneven distribution of rice due to inefficiencies in current distribution systems, resulting in supply shortages in deficit areas. To address this, an efficient food distribution model is essential to ensure equitable allocation and delivery. This study develops a distribution model using the Saving Matrix and Nearest Neighbor methods to optimize rice distribution from commodity warehouses to nine storage points in Serang Regency. The proposed model focuses on minimizing costs by determining efficient routes, distances, and resource allocations. The results identify three optimal routes spanning a total distance of 294.5 km, utilizing three towing trucks with a capacity of 45 tons each. Implementation of the model reduces daily distribution costs to IDR. 1,934,866, compared to the previous IDR. 2,785,000, achieving a cost saving of IDR. 940,134 per day. This substantial efficiency improvement demonstrates the model’s potential to address distribution challenges and support equitable rice allocation. By ensuring cost-effective and optimal transportation, the proposed model provides a practical solution to enhance food distribution systems in Indonesia, addressing key issues in agricultural logistics.
Sustainable Vertical Housing Based on Social and Cultural Activities Tisnawati, Endah; Suparno, Suparno; Ulya Nur Rahmah Ellyanando, Adinda
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 1 (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.v6i1.348

Abstract

The development of vertical housing is currently a response to the problem of population increase. People with low incomes (MBR) who have a range of restrictions, from knowledge gaps to financial difficulties, are typically the ones who live in vertical housing in developing nations like Indonesia. Due to misunderstandings about residents' social and cultural behavior and activities addressing the culture of living in multi-story residences, there are many issues with vertical housing these days, particularly those pertaining to disorganization and improper use of space. The careless use of hallways, which leaves them cluttered with trash, clotheslines, and the possessions of residents, is one issue that frequently arises. This study will outline the issues with vertical housing in Bandung City and provide examples of well-designed housing in the past. The study aims to offer best practices for bridging the gap between the existing conditions and the vertical housing usage pattern. Furthermore, it is anticipated that the findings will lead to both intelligent spatial utilization and sustainable architectural design solutions.
The Influence of Automated Harvest Robots in Japan on the Interest of TRPL IPB Students in Improving the Welfare of Agriculture Manurung, Maryetha Yovanka Leony; Kirana Sya'bani, Salsi; Septia Anggraeni , Ika; Ummah, Khaera; Sacio Ramadhani , Amelia; Fathul Mubin , Ardi; Fuad Rahmatid Dhuha, Muhammad; Rubina Lestari, Humannisa
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 1 (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.v6i1.355

Abstract

This study aims to examine the impact of Automated Harvesting Robots on agriculture in Japan and to investigate how the interest of TRPL IPB students in these technologies might influence agricultural innovation in Indonesia. The research evaluates how these robots have transformed agricultural practices in Japan by enhancing efficiency, reducing labour costs, and alleviating labour shortages. It also explores the potential for these advancements to stimulate agricultural innovation in Indonesia, facilitated by the engagement of TRPL IPB students. A mixed-methods approach was employed, combining an analysis of agricultural productivity and labour data from Japan with surveys and focus groups involving TRPL IPB students. This methodology comprehensively assesses the technological advancements and their implications for both Japanese and Indonesian agricultural sectors. Findings indicate that Automated Harvesting Robots have substantially improved efficiency and lowered labour costs in Japan while addressing labour shortages. These outcomes suggest that similar technologies could be beneficial if adopted in other regions. The high level of interest among TRPL IPB students reflects a readiness to integrate such innovations into Indonesian agriculture. Their feedback on the functionality of these robots offers valuable insights into their perceptions and potential barriers to technology adoption. The study highlights the critical role of technological exchange and student involvement in fostering agricultural innovation. However, limitations include potential cultural and infrastructural differences between Japan and Indonesia that may affect the direct applicability of these technologies. Future research should address these challenges and explore strategies to adapt and implement these innovations across diverse agricultural contexts effectively.
Developing Android Based Ambulance Emergency Application in Sleman Region Gunawan, Gunawan; Itje Sela, Enny; Sri Utami, Wahyu
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 6 No 1 (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.v6i1.363

Abstract

The population of Sleman Regency is 1,318,086 and the death rate is very high. This study searches for people who have difficulty finding ambulance assistance. That’s why an application was created to help sick people arrive on the scene. This app is equipped with LBS (Location-Based Services). This app also uses Firebase as data, a form of Google providing various data services to develop mobile apps like this one in real-time. This app is created in the Java programming language running in Android Studio. Furthermore, this application connects journalists and medical staff directly without the need for intermediaries or other people. In addition to knowing where the ambulance is when it arrives, the app is designed to overcome the problem of doctors determining routes and searching for hard-to-reach victims in an emergency provided with a mobile phone. This application was created to get an ambulance more comfortably and efficiently. The driver will know the exact location of the incident without having to search the incident. He will also get a lot of information. In addition, this application further accelerates quick evacuation of the injured or sick for quick medical assistance. So, this application is practical to use in critical situations. Current technological developments also include many innovations, so this research aims to help people use today’s developing technology more efficiently.

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