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Jurnal Nasional Teknologi Komputer
Published by CV. HAWARI
ISSN : 28087801     EISSN : 28084845     DOI : -
Core Subject : Science,
Computer Science & IT
Jurnal Nasional Teknologi Komputer di bidang ilmu komputer dan teknologi. Jurnal JNASTEK diterbitkan oleh CV. Hawari. Redaksi mengundang peneliti, praktisi, dan mahasiswa untuk menulis perkembangan ilmiah di bidang-bidang yang berkaitan dengan teknologi informasi, teknik informatika dan sistem komputer. Jurnal JNASTEK terbit 4 (Empat) kali dalam setahun pada bulan Januari, April, Juli dan Oktober. Jurnal ini berisi artikel penelitian dan kajian ilmiah.
Arjuna Subject : Ilmu Komputer (semua kategori) - Perangkat Lunak
Articles 83 Documents
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Search results for , issue "Vol 5 No 3 (2025): Juli 2025" : 83 Documents clear
Analisis Penggunaan Pembangkit Listrik Tenaga Surya Sebagai Suplai Cadangan Energi Pada Mesin Mixer Donat (Studi Kasus Di CV Youlanda) Bimo Duta Pangestu; Dino Erivianto; Muhammad Erpandi Dalimunthe
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.249

Abstract

The need for stable electricity supply is a major challenge for Micro, Small, and Medium Enterprises (MSMEs), especially when disruptions occur in the main grid. This study examines the utilization of a small-scale Solar Power Generation System (PLTS) as a backup energy source to operate a donut mixer machine at CV Youlanda. The system consists of two solar panels with a combined power of 40 Wp, two 12V 8Ah batteries, a 1000W inverter, and a 20A charge controller (SCC). The research was conducted through direct field measurements to assess the performance and efficiency of the system under varying weather conditions. The observations show that in sunny weather, the system can generate about 200 Wh per day, which is sufficient to run two cycles of the mixer. The actual energy consumption per cycle was measured at 65.61 Wh. The total system efficiency was 2.63%, including panel efficiency of 8%, battery storage efficiency of 77%, and load efficiency of 42.71%. However, in cloudy weather, the available energy is only enough for about 8 minutes of operation. These findings indicate that, despite its limitations, small-scale PLTS remains a viable alternative energy solution that is cost-effective, environmentally friendly, and suitable for light operational needs in the MSME sector.
Rancang Bangun Sistem Konsentrator Cahaya Matahari Dengan Lensa Fresnel Untuk Meningkatkan Intensitas Cahaya Matahari Pada Panel Solar Cell Dwi Permata Sari; Parlin Siagian; Dino Erivianto
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.250

Abstract

Solar energy is one of the potential and environmentally friendly renewable energy sources. However, the efficiency of sunlight absorption by solar panels is often affected by the intensity of light received. This study aims to design and build a solar light concentrator system using a Fresnel lens to increase the intensity of light received by the solar panel. The issues addressed in this research include how to design a device with a Fresnel lens that can focus sunlight and how the use of this lens affects the electrical power generated by the solar panel. The research method includes the mechanical design of the concentrator system, installation of the Fresnel lens, and testing of light intensity and the output power of the solar panel before and after the lens application. This study is limited to the analysis of increased intensity and electrical power, without considering cost aspects or economic efficiency.
Perancangan Media Pembelajaran Hewan Berkaki Empat Berbasis Augmented Reality Untuk Siswa Paud Harapan Bunda Dengan Metode Design Thinking Devi Fitriani; Ruly Dwi Arista; Heni Wulandari
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.251

Abstract

This study is to design an interactive learning media about four-legged animals based on Augmented Reality (AR) for students of PAUD Harapan Bunda. Conventional learning methods are often less effective in attracting the interest of early childhood learning, so innovation in learning media is needed. The Design Thinking approach is used in the development of this media, including the stages of Empathize, Define, Ideate, Prototype, and Test. The Empathize stage is carried out through observation and interviews with teachers and students to understand the needs and challenges of learning. The Define stage identifies the main problem, namely the lack of interesting and immersive media. At the Ideate stage, various AR learning media concepts are developed. Then, the Prototype stage involves building an AR application that allows students to see 3D models of four-legged animals in the real environment through mobile devices. The Test stage is carried out by direct trials on PAUD Harapan Bunda students to evaluate the effectiveness and ease of use of the media. The results of the study are expected to show that this AR learning media can significantly increase the motivation, understanding, and learning experience of PAUD Harapan Bunda students regarding four-legged animals.
Desain UI&UX Aplikasi Web Pemesanan Dekorasi Miss Eka Gallery Dengan Metode User-Centered Design Muhammad Reza Fahlefi; Hermansyah; Heni Wulandari
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.252

Abstract

Miss Eka Gallery is a decoration service business for various events such as weddings and birthdays that currently still uses conventional ordering methods through direct communication or social media. This ordering method often results in delayed responses, misinformation, and difficulties in order management. Therefore, this study was conducted to design a website application with optimal UI (User Interface) and UX (User Experience) design so that customers can easily view the decoration catalog, place orders, and get confirmation in real-time. The method used in this study is User-Centered Design (UCD) with a design thinking approach consisting of five stages, namely empathize, define, ideate, prototype, and test. Data were obtained through observation and questionnaires to application users to understand their needs, complaints, and preferences. The design results show that the developed web application prototype can display the decoration catalog well, simplify the ordering process, and provide easy service confirmation to customers. Based on testing using the System Usability Scale (SUS) and User Experience Questionnaire (UEQ) on 14 respondents, it was found that most users still felt less helped, especially in the aspects of navigation and clarity of decoration information. Respondents also suggested adding features such as a chatbot, QRIS payment methods, and a photo gallery of on-site decorations. The results showed that interactive and user-friendly UI/UX design can increase customer satisfaction. Further research is recommended to develop these additional features to optimize the application and meet user expectations.
Kajian Perencanaan Pembangkit Listrik Tenaga Surya Untuk Budidaya Ikan Mhd. Ilyasa Lubis; Dino Erivianto; Rahmaniar
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.256

Abstract

Sukaraya Village, Pancur Batu District, has great potential in the fisheries cultivation sector. Activities such as aeration and water pumping require reliable and efficient energy sources. Solar Power Plants (PLTS) are a sustainable solution that can overcome these obstacles, considering the abundant availability of sunlight in this area. This study aims to design an optimal PLTS system to support fish farming operations in Sukaraya Village. The design is carried out by considering the power needs of the fisheries system, the potential of solar energy, and the efficiency and reliability of the PLTS components. Based on the research results, the PLTS components consist of 15 pcs of 100 Wp polycrystalline solar panels, a 100 A solar charge controller, 4 12V 150Ah batteries, and an inverter capacity of 7000A. The results of calculations in the PLTS planning can distribute electricity with a load capacity of 5,760Wh. The results of the calculation of the overall cost required in the planning of a solar power plant for fish farming are Rp. 51,912,967
Desain dan Pengembangan Aplikasi Penjualan Berbasis Website di Float Smoothies Shop Medan Dwi Citra Tarcilia Br Berutu; Abdul Khaliq; Supiyandi
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.257

Abstract

The development of information technology is driving digitalization in various sectors, including the culinary business. Medan Float Smoothies still uses a conventional sales system, which creates various obstacles in order recording, stock management, and financial reporting. Therefore, this study aims to design and develop a website-based sales system to improve operational efficiency. The research method used is Research and Development (R&D) with a Software Development Life Cycle (SDLC) Waterfall model approach. The results show that the implementation of the PHP and MySQL-based system has successfully replaced manual processes, improved transaction accuracy, and expanded market reach through the online ordering feature. With this system, customers can easily view products, make transactions, and obtain real-time stock information. The benefits of this research are increased business efficiency, reduced transaction errors, and provided a more practical shopping experience for customers.
Analisis Gangguan Rotor Pada Motor Filter Open Circulating Cooling Water (OCCW) Di Sistem Pendingin PLTU Pangkalan Susu Unit 1 Dan 2 Rudi Maulana; Rahmaniar
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.258

Abstract

The Open Circulating Cooling Water (OCCW) filter motor is a critical component in the power plant cooling system that functions to filter seawater before it is used to cool equipment such as the Heat Exchanger Close Circulating Cooling Water System, Hydrogen Generator Cooler, and Turbine Lubricating Oil Cooler.This study aims to analyze the rotor disturbance in the OCCW filter motor and develop solutions to improve the reliability of the cooling system.The analysis was conducted using predictive maintenance methods with vibration analysis techniques based on ISO 10816-3 standards, interviews with operators, direct observations, and operational documentation at the Pangkalan Susu Power Plant Unit 1 and 2. Vibration measurements showed abnormal values at bearing 1H (8.4 mm/s) and bearing 2H (7.5 mm/s), exceeding the ISO 10816-3 standard limit (≤7.1 mm/s) and falling into the "danger" category. Spectrum analysis identified damage to the rotor bearing with a dominance of Ball Pass Frequency Outer Race (BPFO) at 2.2 x order. Replacing the bushing with an SKF 6306-Z/C3 bearing successfully reduced the vibration values to the normal range (0.56-1.01 mm/s). The implementation of bearings as a replacement for the bushing proved effective in addressing the OCCW filter motor rotor disturbance, preventing unit derating of 80 MW, and saving financial losses of up to IDR 865,280,000 per occurrence with an investment cost of only IDR 7,970,000.
Analisis Pengaruh Beban Peralatan Bengkel Terhadap Intensitas Konsumsi Energi (IKE) di PT. Buana Jaya Lestari Taufik Refyandra; Rahmaniar; Parlin Hambali
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.259

Abstract

This study analyzes the Energy Consumption Intensity (ECI) at the multi-story motorcycle workshop of PT. Buana Jaya Lestari in Medan to identify energy consumption characteristics and optimization potential. The research method used energy audits, direct measurements, and historical energy consumption data analysis over a 12-month period. The research object is a multi-story workshop with a total area of 1,850 m² distributed across three floors with different functions. The results of the study show a total ECI of 100.67 kWh/m²/year, which meets the national standard for commercial buildings with partial air conditioning. Energy consumption distribution per floor varies significantly: floor 1 (138.09 kWh/m²/year), floor 2 (99.84 kWh/m²/year), and floor 3 (48.00 kWh/m²/year). The air conditioning system dominates energy consumption with a contribution of 42.1%, followed by the lighting system (23.9%), workshop equipment (20.0%), and support systems (14.0%). The most influential factors are external ambient temperature (correlation 0.85) and the number of vehicles served (correlation 0.78). Energy savings potential reaches 13.4% or 24,878 kWh/year through optimization of the air conditioning system and retrofitting of the lighting system. Implementing energy conservation strategies can result in financial savings of Rp 37,317,000/year, a reduction in CO₂ emissions of 17.41 tons CO₂eq/year, and a decrease in the Energy Performance Index (EPI) to 87.25 kWh/m²/year.
DETEKSI SHORT CIRCUIT PADA INSTALASI LISTRIK RUMAH TINGGAL BERBASIS ARDUINO Achmad Fauzi; Zuraidah Tharo; Dino Erivianto
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.260

Abstract

This research aims to design and test a prototype short circuit detection system for residential electrical installations based on the Arduino Uno microcontroller. The system employs the ACS712 current sensor to detect current surges and uses a relay module to automatically disconnect only the affected circuit. The test results show that the system can accurately detect short circuits with an average response time of 35 milliseconds. It also provides fault location information through an LCD display, improving the efficiency of technical handling. Sensor calibration indicates acceptable accuracy, with measurement deviation under 7%. This system is effective in enhancing residential electrical safety and minimizing the impact of faults on other circuits
Implementasi Metode ROC dan SMART dalam Sistem Pendukung Keputusan Pemilihan Lokasi Cabang Bimbingan Belajar AlphaKids Generation Imran Lubis
Jurnal Nasional Teknologi Komputer Vol 5 No 3 (2025): Juli 2025
Publisher : CV. Hawari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61306/jnastek.v5i3.261

Abstract

Strategic location selection is a crucial factor in the success of business expansion, including in the education sector such as tutoring institutions. AlphaKids Generation, as a growing tutoring center, requires an objective and structured system to determine new branch locations. This study aims to design a decision support system based on the Rank Order Centroid (ROC) and Simple Multi Attribute Rating Technique (SMART) methods to assist the location selection process. The ROC method is used to determine the weight of criteria based on their priority, while the SMART method evaluates location alternatives based on performance scores and assigned weights. The system was developed using the Rapid Application Development (RAD) approach and implemented on a web-based platform. The results show that location A5 (Jl. Karya Jaya) is the best alternative, achieving the highest score of 1.000. This system supports decision-makers in selecting the most appropriate location through a quantitative and objective analysis.

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