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All Journal Jurnal Informatika dan Teknik Elektro Terapan Indonesian Journal of Cardiology International Journal of Science, Engineering and Information Technology Malcom: Indonesian Journal of Machine Learning and Computer Science
Afrianti, Rien
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Health Professions Industrial & Manufacturing Engineering Mechanical Engineering Medicine & Pharmacology

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RANCANG BANGUN SISTEM PEMANTAUAN ENERGI LISTRIK DENGAN AUTOMATIC TRANSFER SWITCH Laksono, Dedi Tri; Afrianti, Rien; Fatma, Mira Wellya; Prasafitri, Maresa; Alchudri, Hamdi
Jurnal Informatika dan Teknik Elektro Terapan Vol 13, No 1 (2025)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jitet.v13i1.5492

Abstract

Penelitian ini bertujuan untuk merancang dan mengimplementasikan sistem pemantauan energi listrik berbasis Internet of Things (IoT) dengan NodeMCU ESP8266, sensor PZEM-004T, serta Automatic Transfer Switch (ATS). Sistem ini didesain untuk meningkatkan efisiensi energi di industri rumahan dengan memanfaatkan dua sumber listrik, yaitu PLN sebagai sumber utama dan Pembangkit Listrik Tenaga Surya (PLTS) sebagai cadangan. Pengguna dapat memantau konsumsi energi secara real – time melalui aplikasi Blynk. Hasil pengujian menunjukkan bahwa sistem ini mampu mengirim data konsumsi energi, dan ATS berfungsi dengan baik dalam mengalihkan sumber daya listrik secara otomatis tanpa gangguan. Dengan pengembangan lebih lanjut, sistem ini berpotensi untuk diintegrasikan dengan penyimpanan energi dan algoritma pengoptimalan, guna meningkatkan efisiensi dan keberlanjutan penggunaan energi pada skala yang lebih luas. Penelitian ini diharapkan dapat memberikan kontribusi dalam penerapan teknologi IoT untuk pengelolaan energi yang lebih efisien di sektor industri.
Faktor Risiko Pneumonia Paska Operasi Bedah Pintas Arteri Koroner Fadhilah, Vita Karima; Achmad, Chaerul; Afrianti, Rien; Santoso, Prayudi
Jurnal Kardiologi Indonesia Vol 45 No 4 (2024): Online First - Indonesian Journal of Cardiology April-June 2021
Publisher : The Indonesian Heart Association

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30701/ijc.1789

Abstract

Background: Postoperative pneumonia (POP) is a common infectious complication of coronary artery bypass grafting (CABG), leading to significant morbidity, mortality, and increased healthcare costs. This study found that the prevalence of POP was nearly double that reported in previous studies, underscoring the urgent need to identify specific risk factors. These findings emphasize the importance of local data in refining preventive strategies and improving clinical outcomes in CABG patients. Material and Methods: This is a retrospective cohort study. The subjects comprised patients who underwent CABG procedures at a single institution between June 2020 and June 2024. A logistic regression analysis model for evaluating the risk of POP was established. Results: This study observed a POP rate of 41.7%, significantly exceeding the 2–24% range reported in previous studies. Key risk factors included elevated creatinine levels, eGFR <60 ml/min/1.73 m², and low early postoperative albumin. POP strongly correlated with prolonged hospitalization, with an odds ratio of 13.043 (95% CI: 6.130–27.751, p < 0.0001), underscoring its substantial impact on patient outcomes. Conclusions: The present study delineates renal impairment and hypoalbuminemia postoperative as pivotal risk factors for POP following CABG. It emphasizes the importance of tailored interventions, structured institutional practices, and continuous research to enhance preventive strategies and patient outcomes.
RANCANG BANGUN SISTEM PEMANTAUAN ENERGI LISTRIK DENGAN AUTOMATIC TRANSFER SWITCH Laksono, Dedi Tri; Afrianti, Rien; Fatma, Mira Wellya; Prasafitri, Maresa; Alchudri, Hamdi
Jurnal Informatika dan Teknik Elektro Terapan Vol. 13 No. 1 (2025)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jitet.v13i1.5492

Abstract

Penelitian ini bertujuan untuk merancang dan mengimplementasikan sistem pemantauan energi listrik berbasis Internet of Things (IoT) dengan NodeMCU ESP8266, sensor PZEM-004T, serta Automatic Transfer Switch (ATS). Sistem ini didesain untuk meningkatkan efisiensi energi di industri rumahan dengan memanfaatkan dua sumber listrik, yaitu PLN sebagai sumber utama dan Pembangkit Listrik Tenaga Surya (PLTS) sebagai cadangan. Pengguna dapat memantau konsumsi energi secara real – time melalui aplikasi Blynk. Hasil pengujian menunjukkan bahwa sistem ini mampu mengirim data konsumsi energi, dan ATS berfungsi dengan baik dalam mengalihkan sumber daya listrik secara otomatis tanpa gangguan. Dengan pengembangan lebih lanjut, sistem ini berpotensi untuk diintegrasikan dengan penyimpanan energi dan algoritma pengoptimalan, guna meningkatkan efisiensi dan keberlanjutan penggunaan energi pada skala yang lebih luas. Penelitian ini diharapkan dapat memberikan kontribusi dalam penerapan teknologi IoT untuk pengelolaan energi yang lebih efisien di sektor industri.
Technical Performance Analysis of a 1 MWp Grid-Connected Photovoltaic System in Pangkalan Kerinci, Indonesia Using PVsyst Simulation Laksono, Dedi Tri; Laksono, Deni Tri; Fahmi, Monika Faswia; Afrianti, Rien; Dodi, Nofri
International Journal of Science, Engineering, and Information Technology Vol 10, No 1 (2025): IJSEIT volume 10 Issue 1 December 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/ijseit.v10i1.32479

Abstract

The increasing demand for clean energy in Indonesia has accelerated the deployment of grid-connected photovoltaic (PV) systems. This study presents a technical performance analysis of a 1 MWp grid-connected PV system located in Pangkalan Kerinci, Indonesia, using the PVsyst v7.4.6 simulation software. The system comprises 1818 Trina Solar TSM-DE19-550Wp modules mounted on a fixed-tilt structure (2.2° tilt, 180° azimuth) with two SMA Sunny Central 400 MV-11 inverters (DC/AC ratio = 1.25). Meteorological data from Meteonorm 8.1 (1996–2015) was used to simulate annual irradiation and system output. The results show an annual energy production of 1,404,124 kWh, corresponding to a specific yield of 1,404 kWh/kWp/year. The Performance Ratio (PR) reached 82.75%, indicating high system efficiency under tropical climatic conditions. Loss analysis revealed that thermal losses (9.36%) and IAM losses (2.58%) were the dominant factors, while inverter losses accounted for 2.86%. Module mismatch and wiring losses were minimal at 2.15% and 1.5%, respectively. The high PR and low degradation assumptions confirm the suitability of the selected configuration for equatorial regions. This study provides a robust technical benchmark for similar PV installations in Sumatra and supports optimal design decisions for future utility-scale solar projects in Indonesia.
Performance Evaluation of a 250 Wp Solar Photovoltaic Water Pumping System in Tropical Climate: A Case Study in Pangkalan Kerinci, Indonesia Afrianti, Rien; Laksono, Dedi Tri; Laksono, Deni Tri; Fahmi, Monika Faswia
International Journal of Science, Engineering, and Information Technology Vol 10, No 1 (2025): IJSEIT volume 10 Issue 1 December 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/ijseit.v10i1.32508

Abstract

Access to clean water in remote tropical regions remains a critical challenge, particularly where grid electricity is unavailable. Solar photovoltaic (PV) water pumping systems offer a sustainable, off-grid solution. This study evaluates the technical performance of a 250 Wp PV-powered deep well water pumping system installed in Pangkalan Kerinci, Indonesia (0.41°N, 101.85°E). The system employs a single Trina Solar TSM-310PD14 module connected to a Sun Pumps SDS-D-128 DC membrane pump via an MPPT controller. Using PVSyst v7.4.6, a one-year simulation was conducted under realistic meteorological and hydraulic conditions, including a static water table at 4 m depth and a daily water demand of 0.30 m³. Results indicate that the system reliably meets annual water needs (109 m³/year) with negligible water deficit (0.163 m³, or 0.15%). The annual specific water yield is 522 m³/kWp/bar, while the system operates at an overall efficiency of 4.3% and a pump efficiency of 16.7%. Energy analysis shows 15.5 kWh/year delivered to the pump, with 42.6 kWh/year of excess solar energy unused due to tank capacity limits. The performance ratio (PR) is approximately 87%, confirming high system reliability in equatorial conditions. This study demonstrates the technical viability of small-scale solar pumping for rural water supply in Indonesia.
Peningkatan Efektivitas dan Keamanan Sistem Profil Program Studi Menggunakan Metode Vulnerability Assessment: Enhancing the Effectiveness and Security of Study Program Profile Systems Using the Vulnerability Assessment Method Amir, Faisal; Riyanto, Riyanto; Oriyasmi, Fadhilah; Hasibuan, Rajimar Suhal; Fadilillah, Fadli; Afrianti, Rien
MALCOM: Indonesian Journal of Machine Learning and Computer Science Vol. 6 No. 1 (2026): MALCOM January 2026
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/malcom.v6i1.2318

Abstract

Program Studi D3 Manajemen Informatika PSDKU Pelalawan sebelumnya menggunakan sistem profil berbasis PHP native yang memiliki keterbatasan dalam efektivitas pengelolaan data dan keamanan sistem. Penelitian ini bertujuan untuk merancang dan mengembangkan sistem profil program studi berbasis web menggunakan framework Laravel guna meningkatkan efektivitas dan keamanan pengelolaan data. Penelitian dilakukan dengan menggunakan metode Vulnerability Assessment yang terdiri dari tiga tahapan, yaitu network discovering, vulnerability scanning, dan vulnerability analys. Hasil dari pengujian dengan tool OWASP didapatkan beberapa celah kerentanan yang termasuk kedalam golongan resiko rendah. Metode pengembangan sistem yang digunakan adalah model Waterfall yang meliputi analisis kebutuhan, perancangan sistem, implementasi, dan pengujian. Fitur utama yang dikembangkan meliputi manajemen data dosen, mahasiswa, kurikulum, kegiatan akademik, laporan otomatis, serta publikasi informasi. Dengan adanya sistem baru, efektivitas terlihat dari meningkatnya akurasi dan kecepatan akses data, efisiensi terlihat dari berkurangnya pekerjaan manual dan percepatan pembuatan laporan, keamanan meningkat melalui fitur proteksi otomatis Laravel, dan transparansi meningkat melalui penyajian informasi real-time dan mekanisme kontrol akses yang terstruktur.
Co-Authors Alchudri, Hamdi Chaerul Achmad Dedi Tri Laksono, Dedi Tri Fadhilah, Vita Karima Fadilillah, Fadli Fahmi, Monika Faswia Faisal Amir Fatma, Mira Wellya Hasibuan, Rajimar Suhal Laksono, Deni Tri Nofri Dodi, Nofri Oriyasmi, Fadhilah Prasafitri, Maresa Prayudi Santoso Riyanto Riyanto