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All Journal Journal of Geoscience, Engineering, Environment, and Technology Journal of Applied Geospatial Information Jurnal Mandiri IT Jurnal Minfo Polgan (JMP) Transformasi Masyarakat : Jurnal Inovasi Sosial dan Pengabdian Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Aprima Matondang
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Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Engineering Environmental Science Languange, Linguistic, Communication & Media Library & Information Science Mathematics Physics Social Sciences Other

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Pemodelan Tegangan Lebih Disebabkan Sambaran Petir Menggunakan Arrester IEEE Dengan Aplikasi ATP-EMTP Pada Studi Kasus Di Nias Mutiara S. Simanjuntak; Aprima Anugerah Matondang; Juanto Simangunsong
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 1 No. 6 (2023): Desember : Jurnal Publikasi Rumpun Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/venus.v1i6.218

Abstract

Lightning has always been a dangerous threat to the equipment of electric power systems consisting of: power plants, substations, transmission lines and distribution lines. Generally, overhead high-voltage transmission lines are exposed to lightning strikes. Therefore, the degree of protection against lightning is determined based on the degree of insulation of the equipment. To prevent damage to equipment due to lightning strikes, arresters are used. In this study, three arrester models were used as comparisons, namely. IEEE arrester model. The system was simulated using Alternative Transients Program (ATP) software. The results showed that the lightning rod was declared successful in protecting the transmission system, where the three lightning rods had a Margin Protection (MP) of arresters that reached 28%. In the simulation, it is known that the IEEE arrester successfully cut off the lightning current in the transmission system so that the transient overvoltage recorded on the transformer does not exceed the Basic Insulation Level ((BIL) trafo.
Design of Digital Mobile Application for Marine and Coastal Observation in Northern part of Sumatra Matondang, Aprima A.; Simanjuntak, Mutiara; Simangunsong, Juanto
Journal of Applied Geospatial Information Vol. 8 No. 2 (2024): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v8i2.9166

Abstract

We have successfully developed a mobile program to address the challenges of marine and coastal observation serves as a solution to the communication gap between local peoples with ocean issues. In this app, we examine common of marine problems encountered by civilian and discuss the methods used to diagnose and resolve these issues. Some preventive measures can be taken are mangrove replanting programs, satellite and drone monitoring systems to monitor illegal activities at sea and campaigns to reduce the use of single-use plastics and raise awareness of the importance of marine conservation. These can be combined in a digital application connected to a smartphone. The application can answer future challenges related to observation and preventive measures for strengthening and mitigating disasters in marine and coastal ecosystems that can support maritime-based economic resilience in Indonesia. The application is MyOcean that can handle several problems related with ocean issues. The following displays the home page and registration page on the web-based boarding search application. By utilizing these applications, users can improve their understanding, management, and preservation of coastal areas. These applications are suitable for various groups, including fishermen, government, and the general public.
Penerapan Transfer Learning untuk Klasifikasi Citra Bunga Berbasis Convolutional Neural Network Simangunsong, Juanto; Simanjuntak, Nurmala Dewi; Matondang, Aprima Anugerah
Jurnal Minfo Polgan Vol. 14 No. 1 (2025): Artikel Penelitian
Publisher : Politeknik Ganesha Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33395/jmp.v14i1.14980

Abstract

Klasifikasi citra bunga merupakan salah satu tantangan dalam pengolahan citra digital yang memerlukan ketelitian tinggi dalam mengenali pola visual yang kompleks. Penelitian ini bertujuan untuk menerapkan metode transfer learning berbasis arsitektur Convolutional Neural Network (CNN) dalam mengklasifikasikan citra bunga dari dataset Oxford 102 Flower. Model pretrained yang digunakan meliputi VGG16, ResNet50, dan MobileNetV2, dengan penyesuaian pada layer output untuk mendukung klasifikasi 102 kelas bunga. Data citra diproses melalui teknik augmentasi dan normalisasi, kemudian dibagi menjadi data latih, validasi, dan uji. Hasil pelatihan menunjukkan bahwa model mampu mencapai akurasi validasi di atas 90%, dengan nilai loss yang menurun secara konsisten, tanpa indikasi overfitting. ResNet50 menunjukkan performa terbaik dalam hal keseimbangan antara akurasi dan stabilitas loss. Kesimpulannya, transfer learning terbukti efektif dan efisien dalam menyelesaikan tugas klasifikasi citra bunga, serta memiliki potensi besar untuk diimplementasikan dalam aplikasi identifikasi tanaman otomatis.
¬¬¬Design of search information system using mobile application for car problems in Deli Serdang regency Matondang, Aprima; Simanjuntak, Andrean; Simanjuntak, Mutiara; Simangunsong, Juanto
Jurnal Mandiri IT Vol. 13 No. 1 (2024): July: Computer Science and Field
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/mandiri.v13i1.326

Abstract

We successfully developed the mobile program that can solve the car problems that may be difficult to find the location of garage service. We developed MyBengkel as the solution of the problems between car owners and garage location. We delve into the common types of car problems encountered by drivers and explore the methods used to diagnose and resolve them. From routine maintenance to complex repairs, we will discuss the underlying causes of these issues and examine the technologies and tools employed in modern automotive diagnostics. The location interest in Deli Serdang regency and ist surrounding. The data compilation shows the total casualties in 2021 and 2022 is ranging at 80 – 120 cases in Deli Serdang with various roads type. This application makes it easy to get information on car problems facilities, appropriate prices and boarding car and garage service locations for local peoples and increases promotional opportunities for the garage owners in Deli Serdang locations
Evaluation of Dissolved Oxygen Concentration in Different Circulation Systems on Water Quality in Fish Pond Yohana, Winda Y.; Nasution, Tulus I.; Wahyuningsih, Hesti; Matondang, Aprima A.; Margolang, Anggi R.
Journal of Applied Geospatial Information Vol. 8 No. 1 (2024): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v8i1.7820

Abstract

This study aims to evaluate the impact of different circulation systems on water quality parameters in tilapia rearing. Good water quality is very important in tilapia rearing so that tilapia can grow healthily and optimally. In this study, three different circulation systems were compared, namely a circulation system without a pump, a circulation system with one pump, and a circulation system with two pumps to increase the concentration of dissolved oxygen in the pond. The results of this study showed that CS III was able to maintain an efficient and stable DO concentration of around 7.5 to 8 ppm which also resulted in a stable pH value. Compared to CS I with a low DO concentration of about 3 ppm which impacted the pH value inefficiently. Also, CS II showed stable DO concentrations but decreased pH values. This shows that CS III can create more optimal environmental conditions for tilapia growth compared to other circulation systems. Furthermore, The consistent of DO concentration has an impact on other water quality parameters, namely pH, which is also consistent and stable, which is good for fish health.
Comparing the Behavior and Growth of Red and Black Tilapia in the Same Pond Margolang, Anggi R.; Nasution, Tulus I.; Wahyuningsih, Hesti; Matondang, Aprima A.; Yohana, Winda Y.
Journal of Applied Geospatial Information Vol. 8 No. 1 (2024): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v8i1.7821

Abstract

This study compared the growth of red and black tilapia in a shared pond. It examined environmental factors, including temperature, pH levels, dissolved oxygen (DO), and total dissolved solids (TDS). The study employed a solitary water pump system to monitor fish growth and water quality over 36 days. Although there was a decline in dissolved oxygen (DO) levels on day 18, red tilapia exhibited accelerated growth and higher survival rates, suggesting enhanced environmental adaption compared to black tilapia. The feeding parameters were of utmost importance, and Prima Feed (PF 1000) performed a critical role by offering the ideal levels of protein (39-41%), fat (5%), fiber (6%), ash (16%), and water content (10%). Water quality assessments indicated varying dissolved oxygen (DO) levels, which were affected by temperature fluctuations caused by unpredictable weather conditions. Although the TDS range of 0.5-1.0 ppm was deemed suitable for tilapia cultivation, the total water quality remained suboptimal throughout the investigation. However, the findings indicated that red tilapia exhibited a greater growth rate than black tilapia under identical pond conditions. This can be related to the red tilapia's improved capacity to withstand fluctuations in temperature and retain a higher level of physiological stability. This study offers significant findings regarding the disparities in the two tilapia species' behavior, growth, and survival. These findings can be used to enhance pond management and maintenance procedures to achieve better outcomes in aquaculture.
Etika Dan Tanggung Jawab Digital Bagi Siswa/I SMP Negeri 2 Sihotang Kabupaten Samosir Mutiara S. Simanjuntak; Juanto Simangunsong; Aprima Matondang
Transformasi Masyarakat : Jurnal Inovasi Sosial dan Pengabdian Vol. 1 No. 1 (2024): Januari: Transformasi Masyarakat : Jurnal Inovasi Sosial dan Pengabdian
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/transformasi.v1i1.79

Abstract

SMP Negeri 2 Sihotang is located in Samosir Regency, which is one of the koban schools for flash floods that occur at the end of 2023. This PKM aims to increase awareness of ethics and digital responsibility among junior high school students. With the widespread use of digital technology, especially among teenagers, it is important to introduce the concept of ethics and responsibility in its use. This PKM will adopt an educative approach that involves students directly in the understanding of digital ethics and its impact on individuals and society. The method used with the Socialization method, as well as the creation of multimedia-based educational materials. The main target of this PKM is students of SMP Negeri 2 Sihotang in Samosir Regency. Through an approach that focuses on student participation, it is expected to create a better understanding of the importance of acting responsibly in a digital environment. The expected outcome of this PKM is an increase in students' awareness of ethical and responsible practices in the use of digital technology, as well as their ability to take wise decisions in online situations. Thus, this PKM is expected to make a positive contribution to the formation of good digital character and behavior among students of SMP Negeri 2 Sihotang and the wider community.
Experimental of Environmental Development Using Continuous Solar Dryer With Solid Dehumidification For Coffee Drying Parulian Siagian; Aprima A. Matondang; Andreas V. H. Simanjuntak; Budhi S. Kusuma; Joel Panjaitan; Andrean V. H. Simanjuntak
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 02 (2025): JGEET Vol 10 No 02 : June (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.02.21492

Abstract

As the tropical country, Indonesia has a sustainable solar energy for the farm products such as coffee. Indonesia’s coffee has been categorized as one of the biggest export products in the world and needs a development system to provide drying coffee beans with good quality. Therefore, this study comprehensively explains an experiment to develop a continuous solar air dryer with a hybrid system for drying coffee. The system has two different modes: off-sunny and sunshine hours. The heated air from the collector is driven into the drying chamber during the sunlight. The results show that the drying chamber's maximum temperature during daylight ranged from 40°C to 56°C and 9°C to 22°C warmer than the ideal environment temperature. Then, the coffee beans got the 12,7% moisture content in 107 hours in a solar dryer with solid dehumidification material. During off-sunlight, the air humidity reaches a 17% reduction and relatively consistent with air temperature. Furthermore, the benefit of this research can support the agricultural system without sunlight and apply a molecular sieve as a solar dehumidifier for the desiccant material in the drying chamber.
Advancing Environmental and Health Pollution Monitoring in Medan, Indonesia: A Mechatronics-Based Meta-Analysis Z Zumhari; Hutajulu, Elferida; Sibarani, Baringin; Sirait, Regina; Anggriani, Theresia; Matondang, Aprima A.
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 3 (2025): JGEET Vol 10 No 03 : September (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.3.24694

Abstract

Mechatronics, as an interdisciplinary field integrating mechanical, electrical, computer, and control engineering, provides innovative solutions for energy and environmental challenges in urban regions. This study conducts a systematic literature review and meta-analysis using open access datasets to evaluate solar energy potential, electricity reliability, and air quality in Medan, North Sumatra. Results show that the city has strong solar irradiance levels, averaging 5.75 kWh/m²/day, indicating substantial feasibility for photovoltaic deployment. Electricity reliability, assessed through SAIFI and SAIDI indicators, is more stable in Medan compared with other Indonesian cities, offering a favorable foundation for renewable integration. Air quality analysis reveals moderate conditions, with PM2.5 concentrations averaging 28 µg/m³, slightly above World Health Organization standards, yet lower than Jakarta and Pekanbaru. Across all dimensions, mechatronics applications, including smart grid automation, intelligent inverters, IoT-based environmental sensors, and robotics-assisted monitoring emerge as crucial tools to bridge research and implementation gaps. The study identifies limited adoption of techno-economic feasibility analysis, localized reliability assessments, and distributed sensor networks in Medan, which restricts practical deployment. Future research should emphasize mechatronic frameworks such as predictive control, cyber-physical systems, and stochastic modeling to improve resilience. Policy recommendations highlight the need for targeted incentives, pilot projects, and interdisciplinary collaboration. Overall, this work positions mechatronics as a key enabler for sustainable energy transition and environmental management in Medan, offering insights applicable to other rapidly urbanizing regions in Indonesia.
Quantitative Assessment of Passive Load Balancing for a Designed HVAC Installation: Case study in Magnificent Hall, Deli Park S Suparmono; C Cholish; A Abdullah; Sinambela, Haksa; Alda, Tania; Matondang, Aprima A.; Simanjuntak, Andrean V.
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 3 (2025): JGEET Vol 10 No 03 : September (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.3.24696

Abstract

This study presents a comprehensive analysis of a designed three-phase electrical distribution system for a dedicated Heating, Ventilation, and Air Conditioning (HVAC) plant. Based on data extracted from a single-line diagram and load schedule, a significant inherent load imbalance of 9.15% was identified. This paper outlines a four-stage methodology to investigate the consequences and propose a solution. The methodology includes a system audit, simulation-based consequence analysis of energy losses and motor derating, design of a no-cost phase-swapping mitigation strategy, and a techno-economic evaluation. The proposed passive balancing reduces the load imbalance to 1.32%. The study highlights the critical importance of meticulous load scheduling during the initial design phase to enhance system efficiency, ensure equipment longevity, and achieve significant operational cost savings without capital expenditure.
Co-Authors A Abdullah Andrean V. H. Simanjuntak Andreas V. H. Simanjuntak Anggriani, Theresia Berman Panjaitan Budhi S. Kusuma C Cholish Ginting, Berta Br. Hesti Wahyuningsih Hutajulu, Elferida Joel Panjaitan Juanto Simangunsong Margolang, Anggi R. Mutiara S. Simanjuntak Naibaho, Penteris Rumissar P Nasution, Tulus I. Nobert Sitorus Parulian Siagian S Suparmono Sibarani, Baringin Simangunsong, Juanto Simanjuntak, Andrean Simanjuntak, Andrean V. Simanjuntak, Andrean V. H. simanjuntak, benrad edwin Simanjuntak, Nurmala Dewi Sinambela, Haksa Sirait, Regina Tania Alda Yohana, Winda Y. Z Zumhari