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All Journal POSITRON Integrated Lab Journal
Frida Agung Rakhmadi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Energy Engineering Industrial & Manufacturing Engineering Physics

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RANCANG BANGUN INSTRUMEN URINE ANALYZER SYSTEM BERBASIS RESISTANSI BAGI ANALISIS GANGGUAN FUNGSI GINJAL Frida Agung Rakhmadi; Karmanto Karmanto; Ika Nugraheni Ari Martiwi
Integrated Lab Journal Vol. 5 No. 1 (2017)
Publisher : UIN Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (531.579 KB) | DOI: 10.14421/ilj.2017.%x

Abstract

Penyakit gagal ginjal kronik merupakan keadaan klinis kerusakan ginjal yang progresif dan irreversibel yang berasal dari berbagai penyebab penyakit. Penyakit gagal ginjal kronik di Indonesia memiliki angka prevalensi yang sangat tinggi. Monitoring fungsi ginjal secara teratur  penting untuk pencegahan dan deteksi dini penyakit gagal ginjal kronik. Monitoring fungsi ginjal dapat dilakukan dengan metode urinalisis. Metode urinalisis yang umum digunakan saat ini adalah metode urinalisis secara kimiawi dan biologi. Penggunaan sensor sebagai instrument analisis urin untuk mendeteksi kesehatan ginjal memiliki potensi besar untuk diteliti dan dikembangkan mengingat keterbatasan-keterbatasan metode urinalisis secara kimiawi dan biologi yang ada saat ini, oleh karenanya penelitian ini difokuskan pada design atau rancang bangun sensor pembagi tegangan berbasis resitansi serta kajian sensitifitas dan presisi sensor. Secara garis besar penelitian rancang bangun instrumen urine analyzer system berbasis resistansi bagi keperluan analisis gangguan fungsi ginjal dilakukan dalam dua tahapan yakni tahap pembuatan sensor dan uji karakteristik sensor. Uji karakteristik sensor yang dilakukan berupa uji karakteristik statis yang meliputi fungsi transfer besarta faktor korelasinya, sensitifitas, akurasi, dan presisi. Berdasarkan hasil penelitian diketahui bahwa fungsi transfer dari sensor yang telah dibuat adalah eksponensial  dengan faktor korelasi (r) sebesar -0,942. Uji sensitifitas sensor menunjukan bahwa sensor memiliki sensitifitas sebesar -2,58 x 10-7 V/Ω dengan kategori baik, sedangkan uji presisi sensor menunjukan angka presisi 92,01%.
PROTOTIPE SISTEM PENGUKURAN LAJU KENDARAAN BERMOTOR SEBAGAI UPAYA PENGAWASAN TERHADAP PELANGGARAN RAMBU-RAMBU LALU LINTAS Nandang Kuswandi; Frida Agung Rakhmadi
Integrated Lab Journal Vol. 5 No. 1 (2017)
Publisher : UIN Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (548.204 KB) | DOI: 10.14421/ilj.2017.%x

Abstract

The research on measure system prototype of speed motor vehicle measurement system as surveillance effort of infringement on traffic signs has been done. The research aimed to create a prototype a speed measurement system that can be applied to measure the speed of vehicles on the road. Phases of the research contains of making prototypes which includes the manufacture of hardware and software, prototype testing which consists of a characterization of the output voltage of detector, test of accuracy and precision, and data processing test results. The test results of the output voltage detector readings obtained from ADC value mikrokontoler Arduino Uno. ADC value when conditions hindered was ≥ 813 and when the detector was exposed to laser light was ≤ 91. Meanwhile, the accuracy of test results on the prototype obtained a value of 99.938% and a precision test of 95%.
EVALUASI AKURASI DAN PRESISI RESONATOR HELHOLTZ PADA LABORATORIUM FISIKA UIN SUNAN KALIJAGA Frida Agung Rakhmadi; Dyah Imas Cholidina; Ayu Sakila Arum; Defanny Defanny; Cindy Septiani S; Ade Kurniawan; Agung Nugroho
Integrated Lab Journal Vol. 8 No. 1 (2020)
Publisher : UIN Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/ilj.2020.080105

Abstract

Research on the accuracy and precision of the Helmholtz resonator evaluation at UIN Sunan Kalijaga physics laboratory has been conducted. This research is motivated by the absence of evaluation research on this tool since its arrival in 2008. This research was conducted in 3 stages, namely the preparation of tools and materials, data collection, and data processing. The results of this study provide information that the accuracy of the Helmholtz resonator in the UIN Sunan Kalijaga physics laboratory has decreased. The accuracy is still in the good category, even though it is under SNI and SI. While the precision is still very good and still meets SNI and SI.
IoT-Based Heart Monitoring System with Real-Time ECG Visualization for Low-Cost Telemedicine Applications Yuniati, Anis; Muhammad Habib Kurnianto; Danish Zaky Dhiyaulhaq; Frida Agung Rakhmadi
POSITRON Vol. 16 No. 2 (2026): Vol. 16 No. 2 Edition (This issue was scheduled for publication on July 31, 20
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v16i2.96886

Abstract

This research is motivated by the lack of availability of electrocardiography (ECG) in healthcare facilities. The aim is to design, build, and test an IoT-based, portable and low-cost heart rate or ECG signal monitoring system that displays data in real-time. The system is designed using Blender and Fritzing for circuit schematics. The construction of both hardware and software development, including creating system blocks, casing, and display on IoT On/Off and PlotJuggler. The results of the ECG signal can be displayed on the device's monitor screen or sent via a server over long distances. Medical experts can use this tool remotely to monitor the condition of heart patients. This system consists of several parts, namely a data acquisition unit consisting of an AD8232 ECG sensor and ADS 1115 ADC converter, a data processing unit in the form of an ESP32 microcontroller, a data transfer unit in the form of Message Queuing Telemetry Transport (MQTT), a computer, a real-time ECG plotter GUI, and a power supply unit. The system output displayed a stable signal on the serial monitor and the computer with a GUI ECG real-time plotter. The accuracy of specific PQRST wave patterns was calculated for both rest and stress conditions, yielding a percentage accuracy of 93.93%. The precision of the ECG system was calculated by repeating data collection five times and obtaining average of rest and stress conditions equal to 95.45%. This design system works effectively in the integration of a portable low-cost ECG acquisition system with MQTT-based real-time ECG visualization for remote monitoring applications. The developed system has potential applications in telemedicine and remote healthcare services, particularly in low-resource and geographically isolated areas where access to conventional ECG equipment is limited.
Co-Authors Agung Nugroho Ayu Sakila Arum Cindy Septiani S Danish Zaky Dhiyaulhaq Defanny Defanny Dyah Imas Cholidina Ika Nugraheni Ari Martiwi Karmanto Karmanto Laksono Trisnantoro Muhammad Habib Kurnianto Nandang Kuswandi Retno Rahmawati Rian Agusdian Sidiq Choirul Anwar Widayanti Widayanti Yuniati, Anis