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All Journal ComEngApp : Computer Engineering and Applications Journal Jurnal ULTIMATICS EDUMATIC: Jurnal Pendidikan Informatika Jurnal Mantik Jurnal Informatika: Jurnal Pengembangan IT
Pandapotan Siagian
Institut Teknologi Del
Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media

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Analisa Dan Implementasi Algoritma Enkripsi Simetris Data Encryption Standard (DES) Pada Raspberry Pi Erick Fernando; Dina Fitria Murad; Hetty Rohayani; Fachruddin Fachruddin; Pandapotan Siagian
Ultimatics : Jurnal Teknik Informatika Vol 11 No 2 (2019): Ultimatics : Jurnal Teknik Informatika
Publisher : Faculty of Engineering and Informatics, Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (623.855 KB) | DOI: 10.31937/ti.v11i2.1167

Abstract

The purpose of this article is to present DES encryption on the Raspberry Pi mini pc. This implementation also aims to illustrate that the DES algorithm can be applied with small resources. This research was carried out by an experimental approach, which carried out the implementation process in mini pc hardware and xampp software. The DES algorithm is implemented web-based with PHP programming with the Apache web server using text data. The results of the study, that the DES algorithm can run well with minimum hardware, such as mini pc raspberry with a very fast time in the process, speed in the process and lots of text data from the process. So, the DES algorithm can be widely adopted for various applications from the mini Raspberry PI by producing information that is strong in security and reliability.
Implementation of Portable Off-Grid Solar Water Pump for Irrigation Systems Albert Sagala; Pandapotan Siagian; Indra Tambunan; Tennov Simanjuntak
Jurnal Mantik Vol. 5 No. 4 (2022): February: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

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Abstract

The need for irrigation is absolute for the agricultural system. Water pump is a highly needed tool by society in providing clean water and irrigation. If we only rely on rainwater, the land becomes unproductive in the dry season. The unavailability of electricity in many locations in Indonesia is an obstacle for farmers to install drilled wells or draw water from rivers. In this research, a solar water pump system is designed that allows it to be moved easily. The solar pump uses a 100 Ah battery, a 120 WP solar panel and a 1000 watt inverter. The model has been tested to irrigate strawberry gardens in Pintubosi Village, Toba Regency. The pump has been running for 4 hours (12.00 – 16.00 AM) while irrigating and charging the battery are running simultaneously.
FRAMEWORK MODULAR BERBASIS BLE untuk KONFIGURASI DINAMIS PERANGKAT EMBEDDED HEADLESS dengan APLIKASI MOBILE Eka Stephani Sinambela; Marojahan Mula Timbul Sigiro; Rivaldo Butar-butar; Ezra Pasaribu; Rika Simatupang; Frengki Simatupang; istas Pratomo Manalu; Gerry Italiano Wowiling; Sari Muthia Silalahi; Pandapotan Siagian
Jurnal Informatika: Jurnal Pengembangan IT Vol 11, No 2 (2026)
Publisher : Politeknik Harapan Bersama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30591/jpit.v11i2.10271

Abstract

– This study presents the development of a modular Bluetooth Low Energy (BLE)-based framework designed to enable dynamic configuration of headless embedded devices using an ESP32 microcontroller through a mobile application. Manual configuration processes that require physical device access and firmware reprogramming are often prone to human error and inefficiency, particularly for Internet of Things (IoT) devices deployed at the production stage. The proposed system aims to address these challenges by facilitating real-time, energy-efficient configuration management via wireless communication. The BLE-based mobile application serves as a user interface that allows secure bidirectional data exchange with the embedded device, enabling the modification of configuration parameters such as PIN, IP address, and SSID. The framework also ensures that all configuration updates are stored permanently within the device’s non-volatile memory, thereby eliminating the need for repeated reprogramming. Experimental evaluations were conducted to validate the system’s functionality and reliability. The results indicate that the application successfully scans, connects to, and updates individual ESP32-based headless devices. Configuration changes were applied accurately and persistently, confirming the stability and robustness of the proposed framework. The findings demonstrate that this approach significantly improves efficiency in IoT device management by reducing configuration time, minimizing potential errors, and simplifying maintenance workflows. Overall, the study contributes to advancing the development of intelligent, modular, and energy-efficient solutions for managing distributed embedded systems in modern IoT environments.
Orthology-Based Reconstruction of Parental Gene Inheritance in the Chromosome-Scale PR25 Perennial Rice Genome Martha Britany Napitupulu; Chandro Pardede; Pandapotan Siagian
Jurnal Pendidikan Informatika (EDUMATIC) Vol 10 No 2 (2026): Edumatic: Jurnal Pendidikan Informatika
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/edumatic.v10i2.36252

Abstract

Perennial rice integrates a cultivated rice background with genetic elements from wild species; however, the role of parental gene repertoires in hybrid genomes is not fully understood. This study examined the gene repertoires linked to parents and their functional characteristics within the chromosome-scale PR25 perennial rice genome, which originated from Oryza sativa ssp. indica cv. RD23 and Oryza longistaminata. Structural annotations were transferred using Liftoff, followed by phylogenetic orthology analysis using OrthoFinder, and functional annotation using eggNOG-mapper v2 and InterProScan. Of the 37,581 structurally annotated PR25 loci, 33,305 were aligned using the parental orthology framework. Most of these genes (20,204; 60.7%) had identifiable orthologs in both parents (BOTH), whereas 12,808 (38.5%) were categorized as RD23_only and 293 (0.9%) as OL_only. Among the 25,828 genes with consistent functional annotations, RD23_only genes exhibited a higher presence of secretory and membrane-associated features, such as SignalP-TM (4.42%), whereas OL_only genes had a higher presence of defense-related features, including NB-ARC (6.22%) and Ser/Thr kinase domains (2.90%). Functional annotation was unresolved for 5,746 RD23_only genes (44.9%). These results provide a detailed catalog of parent-associated gene repertoires and functions in PR25. The small proportion of OL_only should be interpreted with caution because of the fragmented nature of the O. longistaminata assembly. This catalog serves as a foundation for functional validation and molecular breeding research.
Architectural Optimization Of A Lightweight Kubernetes Microservices Framework For The Toba Herbal Information System Under Extreme Resource Constraints Pandapotan Siagian
Computer Engineering and Applications Journal Vol. 15 No. 3 (2026)
Publisher : Universitas Sriwijaya

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Abstract

This study designs, implements, and evaluates a lightweight, decoupled virtualization architecture utilizing K3s Kubernetes and Docker containers tailored for the Toba Herbal Information (THI). The system architecture isolates the web application logic, stateful relational databases, and high-velocity user connection sessions into three independent, resource-constrained pod tiers. Operating under a strict single-node hardware envelope of 4 CPU cores and 2 GB RAM, the framework enforces rigorous memory quotas and integrates an in-memory Redis caching buffer. Performance resiliency was rigorously evaluated via Apache JMeter against a baseline monolithic virtual machine (VM) utilizing a peak load of 1,000 concurrent healthcare users, complemented by an intentional Chaos Engineering failure injection. Empirical benchmarks demonstrate that the proposed 3-pod K3s framework successfully accommodated peak traffic with a stable 95th percentile (P_95) latency under 340ms and zero Out-Of-Memory (OOM) disruptions, safely capping RAM saturation at 87%. Conversely, the monolithic setup suffered a catastrophic kernel freeze at 400 concurrent users. Following a forced application pod termination, the K3s control plane achieved an exceptional Mean Time to Recover (MTTR) of 3.8 seconds with 100% transactional data integrity. This paper establishes a repeatable, cost-effective architectural blueprint proving that defensive microservices orchestration can successfully overcome physical hardware barriers to deliver enterprise-grade digital health platforms in resource-constrained rural regions.
Co-Authors Albert Sagala, Albert Chandro Pardede Dina Fitria Murad EKA STEPHANI SINAMBELA Erick Fernando Ezra Pasaribu Fachruddin, Fachruddin Frengki Simatupang Gerry Italiano Wowiling Hetty Rohayani Indra Tambunan Istas Pratomo Manalu Marojahan Mula Timbul Sigiro Martha Britany Napitupulu Rika Simatupang Rivaldo Butar-butar Sari Muthia Silalahi Tennov Simanjuntak