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INDONESIA
Instal : Jurnal Komputer
Published by Cattleya Darmaya Fortuna
ISSN : 20855702     EISSN : 2808683X     DOI : https://doi.org/10.54209/jurnalkomputer.v12i02.22
Core Subject : Science,
Computer Science & IT Decision Sciences, Operations Research & Management
Focus And Scope Instal : Jurnal Komputer is a peer-reviewed scientific journal published by CV. Cattleya Darmaya Fortuna which has been published since 2009. The aim of this journal is to publish high-quality articles dedicated to all aspects of the latest outstanding developments in the field of computer science. Instal : Jurnal Komputer is consistently published two times a year in June and December. This journal covers original article in computer science that has not been published. The article can be research papers, research findings, review articles, analysis and recent applications in computer science. The scope of Instal : Jurnal Komputer covers, but is not limited to the following areas: 1. Data Mining 2. Image Processing 3. Artificial Neural Networks 4. software engineering.
Arjuna Subject : Ilmu Komputer (semua kategori) - Ilmu Komputer (Lain-Lain)
Articles 273 Documents
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Spare Part Detection and Counting System using YOLOv8 Prasetyo, Ariansyah Aryo; Wibowo, Dwi Agung; Rizki, Afian Syafaadi; Karima, Cahya; Permatasari, Nindy
Bahasa Indonesia Vol 17 No 06 (2025): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v17i06.405

Abstract

This research aims to create a spare part detection and counting system to assist employees in calculating stock quantities. The system utilizes artificial intelligence (AI) and computer vision with the YOLOv8 algorithm. The research was conducted at PT Rezki Batulicin Transport Site Sebamban, a company specializing in land transportation services, particularly for coal mining products. The company is located in Tanah Bumbu Regency, South Kalimantan. The spare part detection and counting system has been successfully implemented. Evaluation results show an F1-score reaching a maximum value of approximately 0.86 at a confidence threshold of around 0.385. Precision values remained above 0.8 for most of the confidence range, while maximum recall reached 0.95.
Analysis of Data Security Improvement with the 12x8 Matrix Cipher Playfair Algorithm sipayung, Liskedame Yanti; Siahaan, R. Fanry; Lubis, Rodiah Hanum; Amalia, Dwi Novia
Bahasa Indonesia Vol 17 No 06 (2025): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v17i06.407

Abstract

This research proposes a modification of the Playfair Cipher algorithm with a 12×8 matrix to improve data security. This method expands the key space to 96 by adding characters (letters, numbers, symbols), thereby increasing resistance to brute-force attacks and frequency analysis. Test results show that the resulting ciphertext has high entropy with an even character distribution, and an average encryption time of 0.15 seconds per 1,000 characters. Security analysis proves that the 12×8 matrix requires >10¹⁰⁰ years to be computationally cracked, significantly more secure than the 5×5 matrix. Despite the higher resource requirements, this algorithm remains efficient for applications such as sensitive data storage and encrypted communications. In conclusion, this modification offers significant security improvements without drastically sacrificing performance.  
Analysis of BTS Capacity in Meeting the Information Needs of Border Communities: A Case Study of Internet Network Instability in Kawaluso, Sangihe Islands Israel, Ella Helmy; Papuas, Alfrianus; Maluenseng, Jackried Kanselir; Sehang, Steve Arthur
Bahasa Indonesia Vol 17 No 06 (2025): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v17i06.408

Abstract

The instability of internet access in Kawaluso, Sangihe Islands, an Indonesian-Philippine border island, is thought to hinder fulfilling the community's information needs. This research analyzes the root of the problem through three approaches: (1) Fresnel Zone for physical bottleneck evaluation, (2) bandwidth allocation, and (3) Committed Information Rate (CIR). Results showed no significant physical interference (Fresnel Zone: 79.01 m) and adequate individual bandwidth allocation (33.33 Mbps downlink/day). However, when 135 users accessed simultaneously, the CIR dropped dramatically to 0.74 Mbps/user, far below the Indonesian broadband standard (2 Mbps). Key findings revealed user overcapacity (demand-capacity ratio: 135%) as the leading cause of instability, not geographical or infrastructure factors. The study recommends: (a) an increase in BTS capacity to 270 Mbps, (b) implementation of Quality of Service (QoS) for critical service priorities, and (c) load balancing between operators. Policy implications emphasize adjusting BTS capacity to projected users in remote areas.
Student Grade Input Information System Using Waterfall Method with Web-Based Student Attendance Data Analysis Feature (Case Study: SDN 064037 Medan Tembung) Siregar, Sarmaia; Donni Lesmana Siahaan, Muhammad; Herdianto
Bahasa Indonesia Vol 17 No 06 (2025): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v17i06.409

Abstract

The development of information technology in the digital era requires educational institutions to adopt web-based information systems to improve the efficiency of data management. The process of entering grades and attendance that is still carried out manually has the potential to cause recording errors and delays in reporting. This research aims to design and build a web-based student score input information system with the Waterfall development method, and is equipped with a student attendance data analysis feature. This study was conducted at SDN 064037 Medan Tembung using observation, interview, and literature study methods. The development results show that the system built is multiuser and supports a secure and structured digital value input, attendance, and reporting process. This system makes it easy for teachers and admins to access and manage student data in real-time, accurate, and efficient manners.
Optimal Course Scheduling Decision Support System Using CSP Method Based on Room and Lecturer Availability Naibaho, Eltrina; Sianturi, Ronda Delli; Sirait, Matias Julius Fika; Sianturi, Anggita H.
Bahasa Indonesia Vol 17 No 06 (2025): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v17i06.411

Abstract

Course scheduling is a complex and critical task for universities, as it must consider various constraints such as lecturer availability, classroom capacity, and time slot limitations. Improper scheduling can lead to inefficiencies, conflicts, and dissatisfaction among lecturers and students. This study aims to develop a Decision Support System (DSS) for optimal course scheduling at Universitas Budidarma using the Constraint Satisfaction Problem (CSP) method. CSP provides a structured approach to solve scheduling problems by defining variables, domains, and constraints, and finding solutions that satisfy all requirements. The system was designed to input course data, lecturer availability, and available classrooms, then generate a conflict-free schedule automatically. Testing results show that the CSP-based system successfully generated valid schedules that met all given constraints, reduced scheduling conflicts, and improved resource utilization. This research demonstrates that CSP is an effective method for handling complex academic scheduling tasks, supporting more efficient academic planning processes in higher education institutions.
EVALUASI USABILITY SISTEM INFORMASI PERPUSTAKAAN KOTA MEDAN MENGGUNAKAN METODE SYSTEM USABILITY SCALE Athallah, Owen Gerry; Ilham Aryansyah; Pahtapit Wira Lubis
Bahasa Indonesia Vol 17 No 06 (2025): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v17i06.374

Abstract

Penelitian ini bertujuan untuk mengukur tingkat ketergunaan portal Perpustakaan Kota Medan menggunakan System Usability Scale. Jenis penelitian ini adalah deskriptif dengan pendekatan kuantitatif. Pengumpulan data dilakukan dengan menyebarkan kuesioner yang sudah dibakukan, yaitu System Usability Scale (SUS) kepada 99 responden yang merupakan pengunjung perpustakaan kota medan. Teknik pengambilan sampel, yaitu convenience sampling. Kuesioner SUS telah diuji validitas dan reliabilitas menggunakan teknik Product Moment Pearson dan Alpha Cronbach dengan bantuan IBM SPSS V22. Hasil penelitian menunjukkan ketergunaan portal ini menggunakan empat komponen Nielsen berada di interval 3,24–4,04. Artinya, learnability (3,84), efficiency (3,79), memorability (3,70), dan satisfaction (3,81) pada portal Perpustakaan kota medan tergolong sangat tinggi. Sementara, tingkat ketergunaan portal ini dengan menggunakan SUS adalah 61,97. Berdasarkan grading scale (Bangor, dkk.), portal Perpustakaan kota medan dikategorikan ke dalam grade D dan secara adjective OK (cukup baik). Namun, tingkat penerimaan atau acceptable mahasiswa terhadap portal ini tergolong marginal (kurang diterima), sehingga secara Net Promoter Score (NPS) mereka belum ingin merekomendasikan portal ini kepada pengguna lain (detractor). Oleh karena itu, perlu adanya evaluasi ketergunaan terhadap portal ini menggunakan metode analitik, sehingga dapat ditemukan dan diperbaiki kesalahan (errors) pada antarmuka penggunanya (user interface).
UI/UX Design of a Student Deferment Application Using a User-Centered Design Approach Prayogo, Ario Harry; Laily Indaryani; Elvira Lailatuth Thohiroh
Bahasa Indonesia Vol 17 No 06 (2025): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v17i06.400

Abstract

The process for postponing tuition fee payments (Biaya Penyelenggaraan Pendidikan or BPP) serves as a facility for students who require a deferred payment arrangement. Currently, this process is still carried out manually, leading to issues such as delays, inconsistent data, and low process efficiency. This study aims to develop a BPP payment deferral application with a focus on user interface design, to support more efficient user-related processes. The interface was developed using the User-centered Design (UCD) method, which prioritizes user needs throughout the development process. The UCD approach includes the following stages: identifying the context of use, specifying user requirements, creating design solutions, and evaluating the design. The System Usability Scale (SUS) was employed to evaluate the usability level quantitatively. The evaluation resulted in a SUS score of 80.67, which falls into the ‘acceptable’ category and corresponds to a grade scale of ‘C’. These results indicate that the developed design meets user needs in terms of usability. The findings can serve as a foundation for the subsequent phase, namely the development of the full software system.
DESIGN AND CONSTRUCTION OF A WEB-BASED VILLAGE FUND MANAGEMENT REPORTING APPLICATION AT THE SENA VILLAGE OFFICE, DUSUN V Br Berutu, Ayu Anjelli; Nurjamiyah
Bahasa Indonesia Vol 17 No 07 (2025): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v17i07.412

Abstract

The Deli Serdang Regency Government is located in the Province of North Sumatra, Indonesia. The Village Office of Hamlet V is located on Jalan Batang Kuis Tanjung Morawa, Deli Serdang Regency. Sena Village has X Hamlets, and has Village Officials who are responsible for carrying out village duties and functions. The Sena Village Office of Hamlet V still uses a manual system when conducting Village Fund Management Reports, namely Recording in the Agenda Book. The use of a manual system results in slow processes and potential errors in financial recording. The purpose of this study is to create a Web-Based Village Fund Management Application using the PHP (Hypertext Preprocessor) programming language and the Database used is MySQL (My Structured Query Language). The scope of this study is limited to the development of an information system with login, dashboard, and expenditure report features. The methodology used includes cash basis research methods and prototype development methods. Data were collected through observation, interviews, and literature studies. The results of the study indicate that this application can improve efficiency, effectiveness, and transparency in village fund management. The conclusion of this study is that the application of a web-based information system can facilitate village fund management and improve accountability.
PREDICTIVE ANALYSIS OF TOURIST ARRIVALS IN NORTH SUMATRA USING THE RANDOM FOREST ALGORITHM Br. Pasaribu, Agustina Kristin; Arie Rafika Dewi
Bahasa Indonesia Vol 17 No 07 (2025): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v17i07.413

Abstract

This study aims to develop an accurate predictive model for forecasting the number of international tourist arrivals to North Sumatra Province using the Random Forest algorithm. The data used is sourced from Open Data Sumut and includes historical data on tourist arrivals in previous years. Using the Random Forest Regressor, this model demonstrates high accuracy, with an R-Squared (R²) value of 56,06% and a low Mean Squared Error (MSE) of 36.087.182,23. The results of this study show that the year feature is more dominant in predicting tourist numbers compared to the month feature, indicating that annual trends have a greater influence on tourist arrival patterns than seasonal factors. The predicted number of tourists for July 2025 is 17.597,73
PUCAKO COFFEE ROASTERY WEBSITE DESIGN USING AGILE METHOD Nasution, Isti Nur Fadhilah; Elhanafi, Andi Marwan
Bahasa Indonesia Vol 17 No 07 (2025): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v17i07.416

Abstract

The development of online sales has undergone significant transformation in line with advancements in technology and changes in consumer behavior. Online sales have now become an integral part of daily life, with continued growth projections driven by improvements in internet infrastructure and the convenience of digital payment methods. Website-based technology allows companies to offer products without spatial and temporal limitations, providing ease for entrepreneurs to market products and manage sales data. SMEs (Small and Medium Enterprises) take advantage of this opportunity to expand their market and improve their business operations. Pucako Coffee Roastery, as one of the SMEs producing roasted coffee beans in Medan, faces challenges in product marketing limited to offline sales. This results in difficulties for consumers outside the city to purchase products, as well as limited promotional media and transaction management. To address this, this research aims to design a product sales website using the Agile method, which enables product information to be more easily accessed by consumers and helps Pucako Coffee Roastery develop its business more efficiently. By applying the Extreme Programming method in website development, it is expected that the system built will meet information needs and expedite the transaction process, thus enhancing business competitiveness in an increasingly global and competitive market.

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