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All Journal Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Jurnal Teknologi Informasi Mura
Buky Wahyu Pratama
Universitas Jenderal Soedirman
Agriculture, Biological Sciences & Forestry Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Physics

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PERANGKAT ESTIMASI KADAR HBA1C BERBASIS SINYAL PHOTOPLETHYSMOGRAPHY (PPG): SEBUAH USULAN METODE Muhammad Zakki Irfani; Wisaeini Intannia; Ni’matul Azizah; Buky Wahyu Pratama
Jurnal Teknologi Informasi Mura (JTI) Vol. 17 No. 2 (2025): Jurnal Teknologi Informasi Mura DESEMBER
Publisher : LPPM UNIVERSITAS BINA INSAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32767/jti.v17i2.2859

Abstract

Hemoglobin terglikasi (HbA1c) merupakan indikator utama pengendalian glikemik jangka panjang dan berperan penting dalam deteksi dini serta pemantauan diabetes melitus. Metode pengukuran HbA1c konvensional masih bergantung pada prosedur invasif melalui pengambilan sampel darah yang dapat menimbulkan rasa tidak nyaman, risiko infeksi, serta membutuhkan peralatan laboratorium yang relative mahal. Perkembangan teknologi optik dan kecerdasan buatan membuka peluang untuk mengestimasi kadar HbA1c secara non-invasif dengan memanfaatkan sinyal photoplethysmography (PPG). Penelitian ini merancang sistem akuisisi dan pengolahan sinyal PPG menggunakan rangkaian analog dan digital berbasis ESP32. Pemrosesan meliputi akuisisi sinyal, penguatan sinyal, pemfilteran sinyal, ekstraksi fitur sinyal, dan implementasi algoritma estimasi pada platform mikrokontroler. Sistem juga terintegrasi dengan layanan cloud yang memungkinkan penyimpanan serta visualisasi data secara real-time melalui antarmuka web. Hasil kajian menunjukkan bahwa sinyal PPG memiliki potensi signifikan sebagai indicator non-invasif untuk estimasi HbA1c. Studi terkini melaporkan akurasi prediksi yang kompetitif, sehingga pendekatan ini menjanjikan sebagai pemantauan glikemik yang lebih nyaman, terjangkau, dan berkelanjutan.
Silver Nanowire Transparent Conductive Film Prepared by Spin Coating: Correlating Network Morphology with Optical and Electrical Properties Ni'matul Azizah; Buky Wahyu Pratama; Wardah Nabilah; Yeti Rafitasari
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 3 (2026): August (Inpres)
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i3.2122

Abstract

In this study, silver nanowires (AgNWs) were synthesized through the polyol process and subsequently deposited onto glass substrates by a spin-coating technique to fabricate transparent conductive films. The morphology, optical properties, and electrical performance of the resulting films were investigated using scanning electron microscopy (SEM), UV–Vis spectrophotometry, and sheet resistance measurements. SEM observations confirmed the successful formation of AgNWs with an average diameter of 332 nm and a length of 28 µm. After film deposition, the AgNWs formed a dense and interconnected network with average dimensions of 178 nm in diameter and 12 µm in length. Optical characterization revealed a transmittance of 86.6% at 550 nm, indicating high transparency in the visible region. Electrical measurements showed a low sheet resistance of 3.3 Ω/sq, indicating good electrical conductivity of the fabricated film. The observed combination of high transmittance and low sheet resistance is attributed to the interconnected AgNW network morphology, in which numerous nanowire junctions provide effective electron transport pathways while the open regions between neighboring nanowires allow efficient light transmission. This correlation between network morphology and the resulting optical and electrical properties suggests that the fabricated AgNW film possesses characteristics suitable for transparent conductive electrode applications.
Co-Authors Muhammad Zakki Irfani Ni'matul Azizah Ni’matul Azizah Wardah Nabilah Wisaeini Intannia Yeti Rafitasari