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All Journal Jurnal Aplikasi dan Teori Fisika International Journal Software Engineering and Computer Science (IJSECS) Abdi Teknoyasa
Imam Tri Harsoyo
Sekolah Tinggi Ilmu Kesehatan Semarang
Astronomy Computer Science & IT Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Physics

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Perbaikan Alat Rekam Jantung (Elektrokardiograf/Ekg) Di RSUD Dr. Soewondo Kendal Pramesti Kusumaningtyas; Imam Tri Harsoyo; Ridwan Zulpan Asari; Sovia Ranty
Abdi Teknoyasa Volume 4, No.1, Juli 2023
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/abditeknoyasa.v4i1.1908

Abstract

Ketersediaan peralatan barang medis merupakan variabel dominan dalam mempengaruhi kepuasan pelanggan terhadap kualitas/mutu pelayanan di rumah sakit, sehingga kondisi dan fungsi peralatan medis harus dikontrol dengan baik. Kegiatan ini bertujuan untuk mendukung mempertahankan kualitas pelayanan kesehatan di RSUD Dr. Soewondo Kendal melalui perbaikan alat elektromedik yang rusak. Di RSUD Dr. Soewondo Kendal terdapat 2 unit alat rekam jantung atau Elektrokardiograf (EKG) yang tidak berfungsi dengan baik, yaitu EKG Merk Fukuda CardiMax FX-7102 dan EKG Merk BTL 08 MT Plus. Kerusakan alat diketahui dengan metode wawancara dengan user, pengamatan secara visual, uji fungsi dengan phantom dan pengukuran pada titik pengukuran tertentu pada rangakaian elektrik alat tersebut. Berdasarkan analisa yang dilakukan, kerusakan terjadi pada rangkaian multiplexer pada EKG Merk BTL dan rangkaian elektrik keypad on/off pada EKG Merk Fukuda. Setelah dilakukan langkah perbaikan dan uji fungsi menggunakan phantom maka EKG dapat bekerja secara normal, namun kalibrasi alat harus tetap dilakukan untuk memastikan kelaikan EKG. Hasil dari kegiatan ini menunjukan adanya peningkatan usia pakai peralatan EKG untuk menunjang pelayanan kesehatan di RSUD Dr. Soewondo Kendal.
Penerapan Sistem Bank Soal dengan Metode Ishihara Berbasis IoT Pada Alat Tes Buta Warna Windanita Tada Bale; Imam Tri Harsoyo
Jurnal Teori dan Aplikasi Fisika Vol. 13 No. 01 (2025): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v13i01.473

Abstract

Color blindness is a general term for a condition or condition in which the quality of color vision is impaired. People with color blindness have difficulty distinguishing certain shades of color. Color blindness is also called Color Vision Deficiency (CVD) taking into account the prevalence of color blindness in Indonesia of 0.7% which is a cause of disability. Therefore, it is necessary to develop an Internet of Things (IoT) based color blindness test tool with the application of a question bank system using the Ishihara method which can help users check for color perception disorders which can be implemented by checking color blindness early on. In designing this IoT-based color blindness test tool, measurements were taken on 30 respondents to check the accuracy of the tool that has been designed. This color blindness test tool has an accuracy of 97%. This color blindness test tool functions to help users more easily carry out color blindness tests because it has an IoT base using the NodeMCU ESP32 microcontroller. This tool allows users to not be able to memorize questions like in the color blind test which uses a manual Ishihara book, because the question bank system in this tool involves randomizing the questions and the results can later be accessed via a web server.   Keywords: Color Blind, NodeMCU ESP32, Web Server
Komparasi Phantom Berbasis Agar dan Minyak dalam Pengujian Vertical Distance dan Horizontal Distance pada Perangkat USG Pramesti Kusumaningtyas Kusumaningtyas; Imam Tri Harsoyo; Mohamad Sofie; Iqbal Dwiky Septyawan
Jurnal Teori dan Aplikasi Fisika Vol. 14 No. 01 (2026): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v14i01.542

Abstract

Ultrasound phantom is an important tool in simulation, training, and calibration of ultrasound devices. This study aims to compare the performance of agar and oil-based ultrasound phantoms using vertical distance and horizontal distance parameters. Both types of phantoms are made by embedding test objects in the form of nylon ropes in their respective media. Evaluation is carried out by measuring the vertical and horizontal distances displayed on the ultrasound image, then compared with the actual distance. The results show that the oil phantom produces measurement deviations that are still within acceptable tolerance limits. The oil-based phantom shows more stable and accurate results. Thus, the oil-based phantom is considered superior and more recommended for use in simulation and testing of ultrasound devices.   Keywords: USG phantom, vertical distance, horizontal distance, agar-based phantom, oil-based phantom.
12-Lead Electrocardiograph Calibrator Mahmud Ma'rufi; Imam Tri Harsoyo; Florentinus Budi Setiawan
International Journal Software Engineering and Computer Science (IJSECS) Vol. 5 No. 2 (2025): AUGUST 2025
Publisher : Lembaga Komunitas Informasi Teknologi Aceh (KITA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35870/ijsecs.v5i2.4726

Abstract

The research develops and evaluates a 12-lead Electrocardiograph (ECG) calibrator using ESP32 microcontroller technology to enhance calibration precision in clinical environments. Healthcare facilities need accurate ECG signal recording through portable calibration devices that maintain ≤ 5% error tolerance. Previous calibrator designs lack unified integration of complete 12-lead functionality, extensive BPM ranges, and variable amplitude control within single portable units. The methodology incorporates hardware-software development, voltage measurements across three assessment points (charger module, ESP32 output, Nextion LCD), BPM validation at four operational settings, and waveform analysis (normal, square) with amplitude evaluation across multiple sensitivities. Experimental results demonstrate an average total error of 1.2% for BPM and amplitude measurements, maintaining voltage stability within ± 5% tolerance limits. Performance analysis validates device reliability for ECG calibration applications, showing optimal performance with square waveform configurations. The ESP32-based calibrator proves technically viable and clinically safe, providing cost-effective, high-precision alternatives to existing solutions. Future development opportunities include triangular waveform integration, Wi-Fi connectivity for remote operation, and rapid calibration initiation features.
Co-Authors Florentinus Budi Setiawan Iqbal Dwiky Septyawan Mahmud Ma'rufi Mohamad Sofie Pramesti Kusumaningtyas Pramesti Kusumaningtyas Kusumaningtyas Ridwan Zulpan Asari Sovia Ranty Windanita Tada Bale