cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Helmi Gunawan
Contact Email
helmig8512@gmail.com
Phone
+6283838806575
Journal Mail Official
simetris@sttrcepu.ac.id
Editorial Address
Jl. Kampus Ronggolawe No.1 Mentul Indah Cepu
Location
Kab. blora,
Jawa tengah
INDONESIA
Simetris
Published by Sekolah Tinggi Teknologi Ronggolawe Cepu
ISSN : 16937066     EISSN : 2686312X     DOI : https://doi.org/10.51901/simetris.v14i2.124
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering
SIMETRIS: The Journal of Technology and Applied Science is a scientific journal published regularly every six months, namely June and December. SIMETRIS: Journal of Technology and Science Accepts articles from various groups covering the study and application of theory, research results, interesting conceptual ideas in the fields of engineering and applied science. The editorial team will decide on the selection of articles to be published after receiving the results from the expert editing team. Authors will be given input from the expert editing team. SIMETRIS: Journal of Technology and Applied Science contains research articles or literature studies in Indonesian and English.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 176 Documents
 14   15   16   17   18 
Pemodelan, Simulasi, dan Analisis Sistem Regulator Tegangan Otomatis Generator Sinkron Dengan Pengendali PID Prasetiyo, Ari Puji
SIMETRIS Vol 18 No 2 (2024): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v18i2.498

Abstract

Kemampuan suatu generator sinkron untuk mempertahankan tegangan terminal ketika terjadi perubahan beban terhubung adalah salah satu karakteristik fundamental dalam analisis stabilitas sistem tenaga. Regulator tegangan otomatis, yang bertanggung jawab terhadap proses stabilisasi tergangan terminal, merupakan suatu sistem kendali umpan balik yang mengukur tegangan keluaran untuk dibandingkan dengan tegangan referensi yang selanjutnya menghasilkan sinyal galat. Pada gilirannya sinyal galat ini akan mengendalikan sistem eksitasi setelah mengalami amplifikasi. Artikel ini membahas pemodelan, simulasi, dan analisis dari sistem regulator tegangan otomatis sederhana. Perangkat yang dipergunakan membangun model sistem adalah penguat, pengeksitasi, generator, dan sensor tegangan yang masing-masing direpresentasikan sebagai sistem orde satu dalam domain frekuensi. Analisis stabilitas Routh-Hurwitz yang diverifikasi dengan root-locus digunakan untuk menentukan nilai gain dari penguat yang menghasilkan sistem kendali stabil. Respons langkah diperbaiki dengan menyertakan stabilisator orde satu dengan satu zero di titik asal. Untuk mengetahui pengaruh nilai gain terhadap karakteristik respons langkah dilakukan parameter sweep terhadap gain dari penguat dan stabilisator. Karakteristik respons langkah yang diamati adalah waktu naik, waktu tunak, dan overshoot. Pengendali PID digunakan untuk mereduksi galat keadaan stabil respons langkah. Melalui penalaan pengendali PID diperoleh respons langkah sistem tanpa galat keadaan stabil, overshoot yang rendah, dan waktu naik serta waktu tunak yang singkat.
IMPLEMENTATION OF MICROSERVICE ARCHITECTURE IN ONLINE SALES INFORMATION SYSTEM Sumariga, Nobi
SIMETRIS Vol 19 No 1 (2025): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v19i1.558

Abstract

Arsitektur microservices merupakan pendekatan modern dalam pengembangan perangkat lunak yang memecah sistem monolitik menjadi layanan-layanan kecil yang independen dan dapat dikembangkan serta dideploy secara terpisah. Penelitian ini mengkaji penerapan arsitektur microservices pada sistem informasi penjualan online yang memiliki kompleksitas tinggi, seperti fitur manajemen produk, proses checkout, pembayaran, pengiriman, dan layanan pelanggan. Penelitian dilakukan menggunakan metode kualitatif melalui studi literatur, analisis kebutuhan sistem, perancangan arsitektur microservices, serta simulasi komunikasi layanan menggunakan REST API dan message broker. Hasil penelitian menunjukkan bahwa arsitektur microservices memberikan keunggulan signifikan dalam hal modularitas, skalabilitas, fleksibilitas, serta kemudahan pemeliharaan dan pengembangan. Setiap layanan dapat dikelola dan diperbarui secara independen tanpa mengganggu sistem secara keseluruhan. Pengembangan paralel oleh berbagai tim memungkinkan percepatan siklus rilis dan efisiensi kerja. Selain itu, sistem lebih mudah diskalakan sesuai kebutuhan beban kerja layanan masing-masing. Namun demikian, kompleksitas sistem juga meningkat, terutama dalam pengelolaan komunikasi antar layanan, keamanan, dan konsistensi data terdistribusi. Implementasi arsitektur ini memerlukan dukungan teknologi modern seperti containerization, orchestration, service discovery, dan centralized monitoring. Kesimpulannya, microservices sangat layak diterapkan pada sistem informasi penjualan online, khususnya pada organisasi dengan kesiapan adopsi DevOps, struktur tim yang jelas, dan infrastruktur yang memadai. Pendekatan ini memberikan fondasi kuat bagi pengembangan sistem yang tangguh dan adaptif terhadap dinamika kebutuhan bisnis.
SISTEM MONITORING DAN PENDETEKSI DINI KUALITAS UDARA BERDASARKAN PARAMETER CO DAN CO2 BERBASIS IoT Ikhsan, Ridhotu Nur; Wibowo, Lastoni
SIMETRIS Vol 19 No 1 (2025): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v19i1.563

Abstract

The increasing number of motor vehicles in urban areas causes a decline in air quality due to emissions such as carbon monoxide (CO) and carbon dioxide (CO₂). If left unchecked, similar conditions may occur in Cepu City. This research developed an air quality monitoring and early warning system based on the Internet of Things (IoT) using an MQ-135 sensor to detect CO and CO₂ and a DHT22 sensor for temperature and humidity. The collected data are transmitted to the Thingspeak platform and sent to users via Telegram notifications. The device was tested for seven days at two different locations in Cepu. The results show that the system can provide real-time air quality information and early warnings to help the public take precautions against air pollution impacts
PREDIKSI KUALITAS UDARA BERDASARKAN PARAMETER CO DAN CO2 MENGGUNAKAN ARTIFICIAL NEURAL NETWORK Putri, Rosalinda Ellysa; Suprawikno, Suprawikno
SIMETRIS Vol 19 No 1 (2025): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v19i1.569

Abstract

This study aims to predict carbon monoxide (CO) and carbon dioxide (CO2) levels as indicators of air quality using the Artificial Neural Network (ANN) method with a 21-20-7 architecture. Data was collected over 28 days using the AQMSense device, with the first 21 days used for training and the remaining 7 days for testing. The results show that the ANN model effectively recognizes historical data patterns, indicated by a regression value close to 1. The prediction accuracy reached 89.96% for CO and 95.84% for CO2, demonstrating strong model performance. ANN proves to be an effective tool for daily air quality prediction and holds potential as a decision-support system for air pollution mitigation
Studi Literatur Terkini Model Generator Heffron-Phillips Prasetiyo, Ari Puji
SIMETRIS Vol 19 No 1 (2025): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v19i1.572

Abstract

This literature review examines the application and development of the Heffron–Phillips model across eight recent scholarly articles focused on the dynamic stability of electric power systems. The Heffron–Phillips model is widely utilized in SMIB configurations to linearly represent the dynamics of synchronous generators and serves as a foundation for designing and optimizing various controllers, such as PSS, supple-mentary damping controllers, and AVR. Several studies extend or modify this model to incorporate modern components, including IPFC, grid-following inverters, and machine learning-based algorithms. The review finds that the model remains highly relevant for small-signal analysis, adaptive controller design, and algorithm performance validation. However, its limitations in addressing ultra-low frequency oscillations and the nonlinear dynamics of renewable-based systems highlight the need for more advanced or frequency-domain models. Overall, the Heffron–Phillips model continues to serve as a critical foundation in power system modeling, though it must be adapted to remain effective in the increasingly complex and dynamic architecture of modern power networks.
Pengaruh Media Pendingin Terhadap Kekuatan Tarik Hasil Pengelasan SMAW Material Pipa Baja Karbon Schedule 40 Suryanto, Hendri; Ikhsan, Muhammad Arif Nur
SIMETRIS Vol 19 No 1 (2025): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v19i1.588

Abstract

Cooling media is one of the factors that affect the quality of welding results. One indicator of the quality of welding results is the tensile strength test. This test is carried out to ensure the maximum tensile strength or stress that can be sustained by the material and its ability to withstand certain mechanical loads. This study was conducted to determine the effect of several types of cooling media, namely free air, distilled water, and SAE 40 oil on the tensile strength of SCH 40 carbon steel pipe material after being welded with SMAW welding. The conclusion obtained from the test data regarding the effect of cooling media on SMAW welding of SCH 40 carbon steel pipe material shows that cooling media with SAE 40 oil has the highest tensile strength and strain values of 714.38 N/mm2 and 6.19%, while the lowest tensile strength value is produced in distilled water cooling media, namely 592.44 N/mm2 and 4.33%.

Page 18 of 18 | Total Record : 176

 14   15   16   17   18 

Filter by Year

2014 2025


Reset
Filter By Issues
All Issue Vol 19 No 1 (2025): SIMETRIS Vol 18 No 2 (2024): SIMETRIS Vol 18 No 1 (2024): SIMETRIS Vol 17 No 2 (2023): SIMETRIS Vol 17 No 1 (2023): Simetris Vol 16 No 2 (2022): Simetris Vol 16 No 1 (2022): Simetris Vol 15 No 2 (2021): Simetris Vol 15 No 1 (2021): SIMETRIS Vol 14 No 2 (2020): SIMETRIS Vol 14 No 1 (2020): SIMETRIS Vol 13 No 2 (2019): SIMETRIS Vol 13 No 1 (2019): SIMETRIS Vol 12 No 2 (2018): SIMETRIS Vol 12 No 1 (2018): SIMETRIS Vol 11 No 2 (2017): SIMETRIS Vol 11 No 1 (2017): SIMETRIS Vol 10 No 2 (2016): SIMETRIS Vol 10 No 1 (2016): SIMETRIS Vol 9 No 2 (2015): SIMETRIS Vol 9 No 1 (2015): SIMETRIS No 18 (2014): SIMETRIS More Issue