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International Journal Science and Technology (IJST)
Published by Asosiasi Dosen Muda Indonesia
ISSN : 28287223     EISSN : 28287045     DOI : https://doi.org/10.56127/ijst.v1i2
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering
International Journal Science and Technology (IJST) is a scientific journal that presents original articles about research knowledge and information or the latest research and development applications in the field of technology. The scope of the IJST Journal covers the fields of Informatics, Mechanical Engineering, Electrical Engineering, Information Systems and Industrial Engineering. This journal is a means of publication and a place to share research and development work in the field of technology.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 20 Documents
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Search results for , issue "Vol. 4 No. 2 (2025): July: International Journal Science and Technology" : 20 Documents clear
Testing Process of Density and Porosity of Aluminium 7075 and Aluminium 6061 Ariyanto, Ariyanto; Ahmad Risa Harfit; Ahcmad Fauzan; Tati Noviati; Bagus Rianto
International Journal Science and Technology Vol. 4 No. 2 (2025): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v4i2.1993

Abstract

Abstract: Aluminium is a lightweight metal with good corrosion resistance and electrical conductivity properties. Testing the density and porosity of aluminiumis important for its development in various applications, including household appliances, aircraft industry, automotive, ships, and construction. The purpose of this research is to determine the density and porosity values of aluminium 7075 and aluminium 6061 samples. Experimental methods, such as the Archimedes method and the Fujitsu FSR A 300g x 0.001g analytical balance, are used to collect data and measure the mass density of the test specimens. The results show that aluminium 6061 has a higher density measurement value (3.302 g/cm3) compared to aluminium 7075 (2.144 g/cm3). The theoretical density calculation results also indicate that aluminium 7075 has a higher value (3.26 g/cm3) compared to aluminium 6061 (3.18 g/cm3). Additionally, aluminium 7075 has a higher porosity calculation value (34.2%) compared to aluminium 6061 (27.6%).
Analysis of Land Use Patterns in the Kampung Minang Tourism Village, Nagari Sumpur, Based on Geographic Information Systems (GIS) Azis, Tengku Abdillah; Sitompul, Delon A.L; Gultom, Maria Joito; Wijaya, Cindy Melissa; Syahfitri, Wiji; Tumiar Sidauruk
International Journal Science and Technology Vol. 4 No. 2 (2025): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v4i2.2107

Abstract

The method used is descriptive quantitative, with primary data collected through field observations and interviews, and secondary data obtained from drone imagery and spatial planning documents. The analysis involved land classification, thematic mapping, and Nearest Neighbor Analysis (NNA). The results show that land use is dominated by sapodilla plantations (48.89%) and rice fields (33.86%), reflecting the village’s agrarian character. Regional facilities are evenly distributed, supporting educational, health, and cultural functions. The NNA indicates a clustered settlement pattern, with a Nearest Neighbor Ratio of 0.329755 and a z-score of -28.470036, signifying concentrated residential areas due to geographical factors and accessibility. These findings emphasize the importance of spatial planning in sustainable tourism village development.
Development of a Dual-Leaf Automatic Door Prototype Based on Arduino using HC-SR04 Ultrasonic Sensor and Servo Motor Syaeful Ilman; Arifin, Tri Nur; Wahyuningsih, erfiana
International Journal Science and Technology Vol. 4 No. 2 (2025): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v4i2.2133

Abstract

This research aims to design and implement a two-leaf automatic door sytem that opens towards the inside by utilizing an arduino microcontroller, HC-SR04 ultrasonic sensor and servo motor. The test results show that the system can work responsively and stably with a good level of detection accuracy and servo movement symmetry. This system has potential to be implemented on a small scale in residential homes, laboratories, or other semi-automatic public spased.
Dynamics of Organic Open Space : Transformation Functions and Activities on the Nunbaun Sabu Coast , Kupang City Messakh, Jeni; Yohanes A. Luwu
International Journal Science and Technology Vol. 4 No. 2 (2025): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v4i2.2146

Abstract

Public open spaces (POS) in coastal areas often develop organically without formal planning, yet play a critical role in the social life of urban communities. This study examines the transformation of the organic public open space at Nunbaun Sabu Beach, Kupang City, Indonesia. The aim of this research is to identify the factors driving the functional transformation of this coastal space and the patterns of social activities occurring within it. A qualitative approach was adopted, using case study methodology, including field observations and in-depth interviews. The findings indicate that the space has shifted from parking lot for churchgoers to a public social space for recreation and social interactions. The transformation is largely driven by the construction of a coastal defense wall (500 meters long), which provided a sense of safety and enhanced the area’s attractiveness for social activities. The beautiful sunset view further entices visitors to engage in activities such as resting, gathering, and enjoying the natural scenery. This study also emphasizes how physical infrastructure, such as the coastal defense wall and the sunset view, plays a critical role in the transformation of this organic public open space, as framed by Michel de Certeau’s theory of space manipulation and Lefebvre’s theory of the production of space. The findings offer valuable insights for urban planning that is more responsive to organically developed public spaces.
Brain Tumor Detection using Deep Learning Sudha, Ms. K; Latha Maheswari, T.; M, Harish; Chandini, Shaik; MS, Jishnu
International Journal Science and Technology Vol. 4 No. 2 (2025): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v4i2.2147

Abstract

Brain tumor detection using deep learning has emerged as a crucial approach to improving early diagnosis and treatment planning. This project presents a novel hybrid deep learning model based on the ShuffleNet architecture to enhance the accuracy and efficiency of brain tumor detection from medical images. Traditional machine learning (ML) models rely on hand- crafted features, which are often time-consuming and less effective. Deep learning, on the other hand, automates feature extraction, improving detection accuracy and reliability. The proposed system leverages the ShuffleNet framework, known for its lightweight and high-performance characteristics, making it well-suited for real- time applications. To further enhance the model’s capability, we modified ShuffleNet by removing its last five layers and replacing them with 15 newly designed layers that increase expressiveness and feature extraction capacity. Additionally, we integrated a leaky ReLU activation function in the feature map to mitigate the vanishing gradient problem and improve model generalization. These enhancements result in superior feature representation and higher classification accuracy for brain tumor pathology detection. The dataset used for model training comprises MRI scans labeled with different tumor types. Preprocessing techniques such as normalization, augmentation, and contrast enhancement are applied to ensure robust training. The modified ShuffleNet model demonstrates higher precision, recall, and F1-score compared to traditional CNN-based models, while maintaining computational efficiency. This system can be deployed in real-time clinical settings to assist radiologists in early tumor detection, reducing human error and enhancing diagnostic speed. The integration of deep learning into medical imaging represents a significant step toward automated, accurate, and efficient brain tumor detection, ultimately improving patient outcomes.
Usability Analysis of the Sahabatku Application using the System Usability Scale Tissa Maharani
International Journal Science and Technology Vol. 4 No. 2 (2025): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v4i2.2174

Abstract

After COVID-19, various mental health issues have been increasing. This is where the important role of information technology comes in, one of which is in the implementation of counseling, which has shifted from face-to-face to online. The Sahabatku application is one of the psychological counseling applications created as an effort to improve mental health. The purpose of this study is to identify the usability value of the Sahabatku application so that it can provide development ideas for developers in the future and to ensure that users of the application are satisfied as they achieve their counseling goals. This research took place from November 2024 to February 2025, using a System Usability Scale questionnaire consisting of 10 questions with a Likert scale of 1-5 to 61 students aged 17-21 majoring in psychology who had never used the application at all. This study concludes that the Sahabatku application received SUS score of 64, placing it at Grade C-, the Adjective scale is rated as OK, the Acceptability scale is marginally accepted, and the NPS score is classified as passive.
Analysis Large Language Model (LLM) for Digital Transformation in a Ministry Andre Pratama Adiwijaya
International Journal Science and Technology Vol. 4 No. 2 (2025): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v4i2.2194

Abstract

Digital transformation in government requires the use of cutting-edge technology to improve efficiency and accuracy in decision-making. Ministries are strategic institutions that manage large-scale data and information, particularly related to regional government administration and population affairs. This article examines the application of Large Language Models (LLM) as an artificial intelligence (AI)-based solution to assist document processing, information extraction, and policy analysis. The study presents a relevant legal framework, LLM model recommendations, a schematic diagram of LLM implementation from end-to-end, and Python code examples for technical simulations. This approach is expected to strengthen the Ministry's digital system in accordance with the guidelines of the Electronic-Based Government System (SPBE) and One Data Indonesia.
Design and Development of a Negative Pressure Wound Therapy Device Citra Ananda Adri Hanifa; Mohammad Rofi’i; Patrisius Kusi Olla
International Journal Science and Technology Vol. 4 No. 2 (2025): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v4i2.2199

Abstract

This study presents the design and development of a Negative Pressure Wound Therapy (NPWT) device aimed at improving the treatment of chronic wounds, particularly diabetic foot ulcers in patients with diabetes mellitus. The primary objective is to create an efficient, user-friendly, and portable wound therapy solution suitable for both clinical and home-based care. The device utilizes negative pressure to enhance blood perfusion, reduce exudate, and lower infection risk, thereby accelerating the healing process. The system is built using a NodeMCU ESP32 microcontroller, a vacuum motor pump, HX710 pressure sensor, solenoid valve, and a Nextion LCD interface. It supports three therapy modes—Continuous, Intermittent, and Dynamic—controlled by a PID algorithm to maintain stable pressure between -25 to -150 mmHg. Testing was conducted at three measurement points: battery voltage, sensor accuracy, and LCD interface functionality. Results indicate that the device performs effectively within expected operational parameters across all modes. The NPWT prototype offers a cost-effective, functional alternative for wound care management and shows promise for further development, including digital integration and broader clinical applications.
A Systematic Review of Geothermal-Solar Hybrid Systems: Design, Performance, Operational Advantages, and Configuration Principles Richard Wempie Vicky Uguy; Estrela Bellia Muaja
International Journal Science and Technology Vol. 4 No. 2 (2025): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v4i2.2204

Abstract

Indonesia’s dependence on fossil fuels has resulted in significant environmental degradation and contributes to rising CO₂ emissions, despite the country’s vast renewable energy potential. Geothermal and solar energy, as two of the most promising clean energy sources, offer complementary characteristics that can be leveraged in hybrid power systems. This study aims to identify optimal configuration strategies for hybrid geothermal–solar systems and evaluate their operational advantages over standalone geothermal plants in the Indonesian context. Employing a Systematic Literature Review (SLR) approach, this research synthesizes findings from recent literature (2012–2024) across major scientific databases. The review focuses on system design, working principles, thermodynamic performance, and implementation feasibility. Results show that preheating/superheating configurations using solar input can significantly enhance geothermal plant efficiency, increase brine enthalpy, and reduce scaling issues—common challenges in Indonesian geothermal operations. Hybrid systems demonstrate an average efficiency gain of 3–7% over conventional configurations. While these systems offer improved reliability, flexibility, and land use optimization, they also involve technical complexity and high capital costs. This study underscores the potential of geothermal–solar hybrid systems to support Indonesia’s clean energy transition by increasing plant efficiency, reducing emissions, and optimizing renewable resource utilization.
Design Thinking: A Practical Method for Designing Stress Management Application Interfaces Using a Biomicroscopy Approach Ernianti Hasibuan; Karin Rehulina; Evans Winanda Wirga
International Journal Science and Technology Vol. 4 No. 2 (2025): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v4i2.2207

Abstract

Academic stress is a significant challenge frequently faced by final-year students and can negatively impact their mental health and academic performance. This study aims to design a user interface for a stress management application using Design Thinking methods and a biomimicry approach, an approach that mimics natural patterns and principles to create more intuitive and effective design solutions. The research process involved in-depth interviews and usability testing with final-year students as the primary respondents. The results showed that the application of biomimicry principles in interface design can create an atmosphere resembling a natural environment that supports relaxation and provides a calming effect for users. Testing using the System Usability Scale (SUS) yielded an average score of 89.38, which falls into the Acceptable and Excellent categories based on the Adjective Rating scale. These findings indicate a very good level of acceptance and a satisfactory user experience. The implementation of the Design Thinking method, starting from the empathize stage to the prototype and test, combined with the biomimicry approach, successfully produced an interface design that is not only aesthetically pleasing and functional but also effective in helping students cope with academic stress.

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