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The Thermodynamics Application In Refrigerator Fatiatun Fatiatun; Sri Jumini; Najib Al Adib; Ismi Rahayu; Maftuh Ulumudin; Mela Afiliyani; Kusnanto Mukti Wibowo
JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Vol 11 No 2 (2023)
Publisher : Pendidikan Fisika UIN Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jpf.v11i2.37084

Abstract

This article describes one of the tools to apply the laws of thermodynamics in daily life in the form of a refrigerator. This article aims to explore, understand, and understand the concept of thermodynamics in refrigerators. Thermodynamics is the field of physics that studies the relationship between heat and mechanical work, temperature and heat, and the kinematics theory of gases. Applying the basic concepts of thermodynamics to machines can support and facilitate human work. Refrigerators that operate according to the Clausius statement of fact (second law of thermodynamics). Coolers use electrical energy to transfer heat from the object being cooled to the hot outside air.
PENGEMBANGAN SIMULATOR FETAL BERBASIS KONTROL SUARA UNTUK PENGUJIAN ALAT FETAL DOPPLER -, Royan; Mukti Wibowo, Kusnanto; Latif, Abdul; Ishartomo, Farid; Tirta Nadi, Danu; Mulyanto, Arif; Rofiqoch, Isnaeni
Jurnal Ilmiah Poli Rekayasa Vol 21, No 1 (2025): Oktober
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.1.424

Abstract

Fetal Doppler is a diagnostic tool to detect fetal heart rate in BPM (beats per minute). Like other medical devices, it must be calibrated periodically by a health facility testing center, as stated in the Regulation of the Minister of Health of Indonesia Number 54 of 2015 article 4 paragraph 1. Article 8 paragraph 1 explains that testing or calibration of medical devices is carried out periodically at least once a year. In addition, testing must be carried out after repairs to medical devices as stated in SNI IEC 62353 of 2014. In addition to testing and calibration, medical devices need to be maintained and tested for function. Therefore, a fetal doppler simulator is needed by medical device technicians to test the function of the fetal doppler. The innovation made on this device is that the simulator is connected to a smartphone with the aim of minimizing electronic components, eliminating settings with buttons and replacing them with Voice Control on the smartphone. This fetal doppler simulator is successfully designed well, it can simulate fetal heart rate from 60-240 BPM with error value of 0% at settings of 90,120,150,180, and 240 BPM. While at setting 60 BPM there is an error value of 1.6%. This simulator is suitable for use as a reference for fetal doppler function test because the error value is below the tolerance of ±5 for BPM on fetal Doppler.
PERANCANGAN DAN IMPLEMENTASI ALAT PENGECEKAN KABEL NURSECALL BERBIAYA RENDAH SEBAGAI ALTERNATIF MULTIMETER Latif, Abdul; Mukti Wibowo, Kusnanto; -, Royan
Jurnal Ilmiah Poli Rekayasa Vol 21, No 1 (2025): Oktober
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.1.426

Abstract

Cables in nurse call systems generally have considerable length and are distributed across multiple installation points, making them vulnerable to faults such as broken wires, loose connections, or continuity problems. These conditions can disrupt communication between patients and medical staff, potentially reducing the quality of healthcare services. Therefore, checking cable continuity before and after the installation process is a crucial step to ensure that each line is properly connected and that the nurse call system operates optimally and reliably. This study designs and tests a low-cost prototype device for checking the continuity of nurse call cables, consisting of two modules: Device A as a 9-volt power source and Device B as a two-line LED-based indicator. The novelty of this research lies in the use of a simple non-microcontroller circuit with direct visual indicators, specifically designed for on-site nurse call cable inspection as a practical alternative to conventional multimeters. The research method includes circuit design, prototype development, and field testing on cables with various length variations, followed by a functional comparison with conventional testing methods. The test results indicate that the device is capable of reliably detecting cable conditions through LED indicators that turn on or off during each test, with a high level of consistency. In addition, its low production cost and ease of use provide practical contributions for technicians involved in the installation and maintenance of nurse call systems, particularly in field conditions that require fast and efficient inspection.
Analisis Perbandingan Tingkat Akurasi Pengukuran Heart Rate pada 3 Jenis Alat Elektrokardiogram (EKG) Ramadhani, Rizka Oktavia; Wibowo, Kusnanto Mukti
CYCLOTRON Vol 9 No 01 (2026): CYCLOTRON
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ct.v9i01.30021

Abstract

Elektrokardiogram (EKG) adalah alat penting dalam bidang kardiologi yang digunakan untuk mencatat aktivitas listrik jantung, termasuk mengukur detak jantung. Perbedaan dalam teknologi, kualitas perangkat, serta cara memproses sinyal pada berbagai merek EKG dapat memengaruhi tingkat ketepatan hasil pengukuran. Penelitian ini bertujuan untuk menganalisis dan membandingkan tingkat ketepatan pengukuran detak jantung pada tiga merek EKG, yaitu Falcon, Schiller, dan Fukuda, dengan menggunakan phantom EKG sebagai acuan. Penelitian ini dilakukan secara kuantitatif dengan metode eksperimental dan dilaksanakan di RSUD Majenang. Pemilihan data dilakukan menggunakan simulator EKG Fluke PS401 dengan pengaturan detak jantung standar, yaitu 30, 60, 120, 180, dan 240 BPM, yang diukur berulang pada masing-masing alat. Analisis data menggunakan metode Bland–Altman untuk menilai kesesuaian dan presisi pengukuran serta uji korelasi Pearson untuk mengetahui hubungan linear antar variabel. Hasil penelitian menunjukkan bahwa ketiga merek EKG memiliki tingkat ketepatan yang baik, ditandai dengan garis bias yang mendekati nol dan semua data berada dalam batas Limit of Agreement. Perbedaan dalam kemampuan presisi terlihat pada lebar pita Limit of Agreement, di mana EKG Fukuda menunjukkan pita yang paling sempit, diikuti oleh Schiller dan Falcon. Hasil uji korelasi Pearson menunjukkan hubungan linear yang kuat dan positif pada ketiga alat.
Rancang Bangun Magnetic Stirrer Dual Position dengan Kontrol Kecepatan dan Waktu Independen Berbasis Mikrokontroler yang Terintregrasi IoT kurniawan, rahmat adi; wibowo, kusnanto mukti
CYCLOTRON Vol 9 No 01 (2026): CYCLOTRON
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ct.v9i01.30077

Abstract

Kebutuhan pengadukan lebih dari satu sampel secara bersamaan dalam kegiatan laboratorium menuntut adanya alat yang efisien dan fleksibel. Oleh karena itu, penelitian ini bertujuan untuk merancang dan membangun magnetic stirrer dual position dengan kontrol kecepatan dan waktu pengadukan yang dapat diatur secara independen serta terintegrasi dengan teknologi Internet of Things (IoT). Sistem dirancang menggunakan mikrokontroler ESP32 sebagai pengendali utama, dengan lima tingkat kecepatan pengadukan, yaitu 1500 RPM, 2000 RPM, 2500 RPM, 3000 RPM, dan 3500 RPM. Pengaturan parameter dilakukan melalui keypad 4×4, sedangkan pemantauan informasi sistem ditampilkan pada LCD. Setiap posisi pengadukan dilengkapi sensor magnetic Hall effect untuk membaca kecepatan putar secara real-time. Selain itu, sistem terintegrasi dengan aplikasi Blynk sehingga memungkinkan pemantauan dan pengendalian jarak jauh melalui smartphone. Hasil pengujian menunjukkan bahwa sistem mampu mengendalikan dua posisi pengadukan secara independen dengan persentase kesalahan kecepatan dibawah 5%. Pengujian sensor RPM menunjukkan nilai error di bawah 0,20% pada seluruh setpoint, yang menandakan akurasi dan kestabilan sensor yang tinggi. Dengan demikian, magnetic stirrer dual position yang dikembangkan dinilai layak digunakan untuk meningkatkan efisiensi dan fleksibilitas proses pengadukan di laboratorium.
Development of Transparent Epoxy Resin–Bi₂O₃ Composites as Alternative Radiation Shielding Materials for Optical Shielding Rifa'i Majid, Rizki; Mukti Wibowo, Kusnanto; Pratama Rahardian, Arga; Rahman Nugraha, Fathur; Supriyadi, Supriyadi
Jurnal Health Sains Vol. 7 No. 3 (2026): Journal Health Sains
Publisher : Syntax Corporation Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/jhs.v7i3.2817

Abstract

Scattered radiation exposure during radiology procedures can reach the head and eye lenses of personnel, requiring eye protection with good radiation attenuation capabilities without compromising comfort. Conventional lead-based radiation protection materials have high density, making them heavy and less ergonomic for long-term use. This study aims to evaluate the X-ray attenuation capability of a transparent epoxy resin–bismuth oxide (Bi₂O₃) composite as a candidate optical shielding material for radiation glasses based on the Half Value Layer (HVL) parameter. The composite was made using epoxy resin as a matrix and Bi₂O₃ as a high atomic number filler, with a mass ratio of 5:1 and a thickness of 0.5 mm and 1.0 mm. Measurements were performed using a diagnostic X-ray machine at voltages of 40 kV and 45 kV with an ionization dosimeter detector. The HVL value was calculated based on the linear attenuation coefficient (μ), and the data were analyzed using the Shapiro–Wilk normality test and Spearman's correlation. The results showed that an increase in composite thickness resulted in an increase in the HVL value, and there was a significant positive correlation between thickness and HVL (r = 0.681; p < 0.01). The epoxy resin–Bi₂O₃ composite showed effective attenuation at thin thicknesses with optical transparency characteristics, making it a potential lead-free optical shielding material for radiation glasses. These findings demonstrate that Bi₂O₃--epoxy resin composites are promising candidates for developing lightweight, transparent, and effective radiation protective eyewear.