cover
Contact Name
Muhammad Iqbal
Contact Email
halopublikasi@hawari.id
Phone
+6281269617312
Journal Mail Official
redaksijnastek@hawari.id
Editorial Address
Jl. Sei Batu Gingging Ps. X No.33, Padang Bulan Selayang I, Kec. Medan Selayang, Kota Medan, Sumatera Utara 20153
Location
Kota medan,
Sumatera utara
INDONESIA
Jurnal Nasional Teknologi Komputer
Published by CV. HAWARI
ISSN : 28087801     EISSN : 28084845     DOI : -
Core Subject : Science,
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.
Articles 190 Documents
ANALISIS PEREMAJAAN KWH METER PRABAYAR TERHADAP KEANDALAN SISTEM TENAGA LISTRIK Mhd Idris; Zuraidah Tharo; Parlin Siagian
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.v5i3.187

Abstract

Measuring and Limiting Devices (APP) or kWh meters have a very significant role in securing PT.PLN (Persero) income. kWh Meter acts as a transaction point between PT.PLN (Persero) as a producer and customers as consumers, therefore the accuracy of the kWh Meter in measuring energy consumption used by customers plays an important role as company income, because from all PT.PLN (Persero) business processes from generation, transmission, to distribution, only energy measured in the customer's kWh Meter will be the electricity bill that must be paid by the customer as a consumer to PT.PLN (Persero) as a producer. To obtain real measurement results with good quality, consistent preparation and evaluation are needed in its implementation, if not implemented properly it will result in losses for the company in the form of losses caused by the kWh Meter being jammed or damaged and still installed at the customer's transaction point. Therefore, APP must be managed properly and correctly by competent and highly dedicated officers. APP maintenance is carried out with the aim of avoiding measurement discrepancies by APP which ultimately cause excess or shortage of bills.
PERBANDINGAN KINERJA PEMBANGKIT LISTRIK TENAGA ANGIN DAN TENAGA SURYA DI KAWASAN PESISIR Sapta Harianto Sinaga; Siti Anisah
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.v5i3.188

Abstract

The increasing global energy demand demands the development of sustainable renewable energy sources. Indonesia has great potential in utilizing solar and wind energy, especially in coastal areas. This study compares the performance of Solar Power Plants (PLTS) and Wind Power Plants (PLTA) based on energy efficiency, stability of electricity supply, costs, and environmental impacts. The research method used is a quantitative approach with direct measurements of solar radiation intensity and wind speed. The results show that PLTA has a higher efficiency (35%) than PLTS (18%), but its electrical power is more volatile. PLTS is more stable and has lower investment and maintenance costs than PLTA. In terms of the environment, PLTA has the potential to cause disturbances, while PLTS poses challenges in managing solar panel waste. By considering all aspects, the combination of PLTS and PLTA in a hybrid system is the optimal solution to increase the efficiency and confidentiality of electricity supply in coastal areas
Analisis Sentimen terhadap Kurikulum Merdeka di MTS Al Ishlah Medan Menggunakan Algoritma Naïve Bayes WIRABUANA, WIRABUANA; Badawi, Afif
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.v5i3.189

Abstract

Kurikulum Merdeka merupakan salah satu inovasi pendidikan terbaru di Indonesia yang bertujuan meningkatkan kebebasan belajar peserta didik dan otonomi guru dalam menyusun pembelajaran. Namun, implementasinya menimbulkan beragam tanggapan dari para pelaku pendidikan. Penelitian ini bertujuan untuk menganalisis sentimen siswa dan guru terhadap penerapan Kurikulum Merdeka di MTS Al Ishlah Medan. Dengan menggunakan algoritma Naïve Bayes, data komentar diklasifikasikan menjadi sentimen positif dan negatif. Data diperoleh melalui kuesioner, wawancara, dan observasi, kemudian diolah menggunakan teknik preprocessing teks seperti tokenisasi, normalisasi, stopword removal, TF-IDF, dan pelabelan menggunakan kamus InSetLexicon. Hasil analisis terhadap 60 komentar menunjukkan bahwa 75% memiliki sentimen positif dan 25% negatif. Evaluasi model menunjukkan nilai akurasi sebesar 83% atau 0.83, precision dan recall masing-masing serta F1-score 91% atau 0.91 untuk kelas negatif. Temuan ini menunjukkan bahwa mayoritas responden merespon Kurikulum Merdeka secara positif. Penelitian ini memberikan masukan yang berguna bagi institusi pendidikan dan pembuat kebijakan dalam mengevaluasi efektivitas kurikulum baru ini.
INTEGRASI MADRASAH DIGITAL UNTUK PRESENSI DAN DAFTAR NILAI PADA MTSS YP AL AZHAR Abri Pratama; Sri Wahyuni; Randi Rian Putra
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.v5i3.191

Abstract

The development of information and communication technology (ICT) has penetrated various aspects of life, including the world of education. The integration of digital madrasah in the attendance system and grade management at MTsS YP Al Azhar. The research method used is a qualitative approach with a case study, involving observation, interviews, and literature study as data collection techniques. The results showed that the implementation of the digital system has improved the efficiency of the attendance process and management of student grades, facilitated access to information for teachers and parents, and reduced the use of paper. However, there are obstacles such as limited training for educators and technology infrastructure that has not been optimized. The conclusion of this study is that the integration of digital technology at MTsS YP Al Azhar has a positive impact on education management, although further efforts are needed in increasing the capacity of human resources and providing supporting infrastructure.
ANALISIS PENGGUNAAN MOTOR INDUKSI PADA SISTEM KONVEYOR INDUSTRI Ranses Wahyudi Sijabat; Zuraidah Tharo; Haris Gunawan
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.v5i3.192

Abstract

In the modern industrial world, conveyor systems are important components that support the efficiency and sustainability of the production process. The use of induction motors as conveyor drives has become the main choice because of its durability, energy efficiency, and relatively low operational costs. This study aims to analyze the performance of induction motors, especially three-phase induction motors, in belt conveyor systems in industrial environments. The method used is a quantitative descriptive approach by analyzing technical parameters such as motor power, efficiency, power factor, torque, and operational and maintenance data. The results of the study show that a three-phase induction motor with a power of 1.5 kW provides more stable and efficient performance than a single-phase motor of 0.75 kW, both in terms of energy consumption, torque efficiency, and operational efficiency. The efficiency of the three-phase motor is recorded at 88% with energy consumption of ±85 kWh per month in a work cycle of ±200 hours. With a maximum torque of 6.0 Nm, the motor is able to overcome inertia loads optimally. It is concluded that the selection of three-phase induction motors that are in accordance with the needs of the conveyor system can improve energy efficiency and extend the operational life of industrial equipment.
Sentimen Analisis Pada Ulasan Aplikasi Indodana di Google Play Store Menggunakan Algoritma Logistic Regression, Naive Bayes dan Support Vector Machine Sahrul, Muhammad; Afiyati
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.v5i3.194

Abstract

Penelitian ini bertujuan mengevaluasi sentimen pengguna berdasarkan ulasan aplikasi Indodana di Play Store, menggunakan algoritma Logistic Regression, Naive Bayes, dan Support Vector Machine (SVM). Tujuan utama studi ini adalah mengidentifikasi dan mengklasifikasikan ulasan sentimen positif atau negatif, serta mengevaluasi efektivitas sentimen analisis pada produk Paylater dan Pinjaman Online (Pinjol) untuk melihat potensi ketertarikan pengguna terhadap layanan yang ditawarkan. Selain itu, penelitian ini bertujuan untuk membandingkan keakuratan dan performa masing-masing algoritma, guna menentukan algoritma yang paling efektif dalam menganalisis sentimen. Setelah menerapkan algoritma Logistic Regression menghasilkan akurasi 92,01%, presisi 92,12%, recall 91,87%, dan f1-score 91,96%. Sementara itu, algoritma Naive Bayes, diperoleh hasil dengan hasil akurasi 80,91% , presisi 80,69%, recall 80,36% , dan f1-score 80,54%.Di sisi lain, algoritma SVM mencatatkan nilai akurasi 92,63%, presisi 92,17%, recall 91,98%, dan f1-score 92,06%. Pernyataan ini menunjukkan bahwa dalam penelitian ini, algoritma SVM memiliki performa yang lebih baik dibandingkan Logistic Regression, dan Naive Bayes. Diharapkan hasil penelitian ini dapat memberikan pemahaman yang lebih mendalam dan berguna untuk pengembangan aplikasi Indodana serta aplikasi-aplikasi serupa, dengan membantu perusahaan memahami umpan balik pengguna secara lebih mendetail. Dengan demikian, penelitian ini dapat berkontribusi pada perumusan strategi pemasaran yang lebih tepat sasaran serta peningkatan kualitas produk dan layanan yang lebih baik. Penelitian ini juga diharapkan dapat menjadi referensi untuk penelitian selanjutnya di bidang sentimen analisis pada Paylater dan Pinjaman Online, sehingga dapat memberikan nilai tambah bagi perusahaan-perusahaan yang bergerak di sektor keuangan digital.
Pembuatan Robot EA MART Sebagai Expert Advisor Dalam Pasar Forex Menggunakan MQL4 Widyaningsih, Wiwied; Erlina; Lailasari, Mita
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.v5i3.196

Abstract

EA MART adalah salah satu Expert Advisor yang menggunakan strategi Martingale yang melakukan perdagangan secara otomatis di dalam pasar Forex, dengan bantuan broker. Expert Advisor ini dibuat dengan alasan banyaknya keluhan rugi karena money management yang kurang baik atau terlambat entry market karena kurang-nya waktu meng-analis pasar ataupun chart. “Pembuatan EA MART menggunakan MQL4 ”. Broker yang digunakan adalah OctaFX MT4 sebagai platform Trading nya. EA ini meliputi kegiatan jual beli mata uang di forex dengan satuan mata uang yang di gunakan adalah US DOLAR di berbagai currency yang sudah di sediakan Broker-nya. Metode yang digunakan pada penelitian ini adalah Rapid Application Development (RAD) yang dimulai dengan perancangan kebutuhan, kemudian tahap desain sistem, tahap pengembangan dan yang terakhir implementasi yaitu pengujian EA. EA MART telah di uji melalui Broker OctaFX MT4. Pengujian dilakukan dengan back test dengan hasil memuaskan yaitu rasio profit 60% dan loss rasio 40%, tergantung penggunaan lots dan MaxTrade.
Perancangan Aplikasi Database Sistem Pengelolahan Arsip Digital Berbasis Web Mobile Menggunakan Algoritma Levensthein (Studi Kasus : SMA PLUS TARUNA AKTERLIS MEDAN) Rizky ananda fradana; Leni Marlina
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.v5i3.199

Abstract

Archive management that is still done manually at SMA Plus Taruna Akterlis Medan often causes difficulties in searching and archiving documents efficiently. Therefore, this study aims to design and build a web-based mobile digital archive management system using the Levenshtein Algorithm to improve document search efficiency. This system was developed using the PHP programming language and MySQL database, and implementing object-based system analysis modeling, such as Use Case Diagrams, Class Diagrams, and Activity Diagrams. The Levenshtein Algorithm is used in this system to improve the accuracy of document searches based on the similarity of keywords entered by the user, thus facilitating the archive search process. The prototype system developed allows users to manage archive data digitally, including recording incoming and outgoing letters. The implementation of this system is expected to increase the effectiveness and efficiency of archive management in the school environment.
Analisis Dampak Harmonisa terhadap Efisiensi Energi pada Pengoperasian Inverter Air Conditioner Nofan Rullyanto Tinambunan; 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.v5i3.200

Abstract

This research analyzes harmonic characteristics and their impact on energy efficiency in inverter air conditioner operation, as well as evaluates the effectiveness of harmonic mitigation methods. Using a MATLAB/Simulink-based simulation approach, the inverter AC system was modeled under various load levels and operating conditions. Results show that Total Harmonic Distortion (THD) of current is inversely proportional to load level, with the highest THD (30.3%) occurring at 25% load and the lowest (4.5%) at 100% load. Dominant harmonics were identified at orders 3, 5, and 7, contributing significantly to power losses. At low loads, harmonic distortion causes efficiency reduction of up to 10% and decreases the Coefficient of Performance (COP) by approximately 12%. Implementation of passive filters consisting of single-tuned filters for 5th order (250 Hz), 7th order (350 Hz) harmonics, and a high-pass filter for higher-order harmonics (>550 Hz) effectively reduces current THD by 70-80% and harmonic losses by up to 90%, significantly improving system efficiency and COP. The greatest efficiency improvement occurs at low loads, with COP increasing from 9.2 to 10.2 at 25% load. This research provides a foundation for developing power quality standards and more effective harmonic mitigation strategies to enhance energy efficiency in inverter AC systems.
A SISTEM PENDATAAN PELANGGARAN SISWA PADA KANTOR BIMBINGAN KONSELING DI MADRASAH TSANAWIYAH AL WASHLIYAH MEDAN KRIO BERBASIS WEBSITE Wirayuda, Satria; Hariyanto, Eko; Rizal, Chairul
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.v5i3.201

Abstract

Pencatatan data pelanggaran siswa yang dilakukan secara manual sering kali menyebabkan kesulitan dalam pencarian data, monitoring, dan proses evaluasi oleh pihak Bimbingan Konseling. Oleh karena itu, penelitian ini bertujuan untuk merancang dan membangun Sistem Pendataan Pelanggaran Siswa berbasis website di Kantor Bimbingan Konseling Madrasah Tsanawiyah Al Washliyah Medan Krio. Penelitian ini menggunakan metode pengembangan sistem Waterfall yang terdiri dari lima tahapan utama: analisis kebutuhan, perancangan sistem, implementasi, pengujian, dan pemeliharaan. Sistem ini dirancang agar mempermudah guru BK dalam mencatat, mengakses, serta menindaklanjuti data pelanggaran siswa secara digital, cepat, dan akurat. Proses perancangan mencakup pembuatan antarmuka pengguna yang intuitif dan struktur basis data yang efisien untuk mendukung pengelolaan informasi. Hasil pengujian menunjukkan bahwa sistem mampu berjalan dengan baik sesuai kebutuhan fungsional dan non-fungsional yang telah ditentukan. Sistem juga memberikan manfaat nyata dalam meningkatkan efisiensi kerja dan ketepatan dalam pendataan pelanggaran siswa. Dengan adanya sistem ini, proses pendataan dan evaluasi di lingkungan Bimbingan Konseling menjadi lebih profesional dan terorganisir secara digital. Penelitian ini diharapkan dapat menjadi solusi teknologi informasi yang dapat diterapkan pada lembaga pendidikan lainnya untuk mendukung pengelolaan data secara optimal.

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