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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI ORBITA: Jurnal Pendidikan dan Ilmu Fisika Journal of Technomaterial Physics Journal of Energy, Material, and Instrumentation Technology Jurnal Abdimas Kartika Wijayakusuma RENATA Jurnal Pengabdian Masyarakat Kita Semua
Supriyanto, Amir
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Humanities Astronomy Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics Social Sciences Other

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Prototype of a Floating-Type Nanohydro Generator as a Lighting Energy Source for Agricultural Land Pauzi, Gurum Ahmad; Putra, Dio Aditia; Supriyanto, Amir; Suciyati, Sri Wahyu
Journal of Energy, Material, and Instrumentation Technology Vol 6 No 1 (2025): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v6i1.202

Abstract

A floating-type nano-hydro generator prototype has been developed as a source of electrical energy for lighting in agricultural areas. This generator is designed to produce electrical energy without modifying the flow medium, making it easy to apply in various water channels such as irrigation systems, small rivers, and large rivers, as the generator can automatically adjust to the ebb and flow of water. The electricity generated benefits agricultural lands far from PLN (Indonesia's state electricity company) power sources. The average voltage produced in this study was 19.19 volts, with an average generator speed of 30.1 rpm and a turbine speed of 104.4 rpm. Meanwhile, testing results showed voltages ranging from the lowest rotation of 8 volts to the highest rotation of 56 volts. The voltage output from this device can be used to power lights or other small electrical needs.
Electrical Design and Characterization of Plant Microbial Fuel Cell (PMFC) Using Water Hyacinth Plants with Variation of The Amount of Water and The Effect of Sunlight pubiyanti, Intan; Suciyati, Sri Wahyu; Apriyanto, Donni Kis; Supriyanto, Amir
Journal of Energy, Material, and Instrumentation Technology Vol 6 No 2 (2025): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v6i1.155

Abstract

Research on Plant Microbial Fuel Cells (PMFCs) has begun to develop, and various types of plants have been used. This research has realized PMFC using hyacinth plants by diversifying the amount of water and the effects of sunlight. The electrical properties of PMFCs aim to determine the effect of variations in the amount of hyacinth and sunlight on the power generated. In the reactor, the electrodes used are Cu and Zn plates. Data were collected by placing three reactors outdoors for 14 days or 331 hours. Based on the study's results, PMFC in reactor c, containing three clumps of hyacinth, obtained greater electrical power than in reactors A and b. The maximum electrical power is 6.31 mW on the 61st hour or 3rd-day measurement at 13.00 WIB. PMFC produces greater electrical power in external conditions than in internal conditions.
IMPLEMENTASI BOOST CONVERTER PADA SISTEM SEL VOLTA BERBAHAN AIR LAUT DENGAN KATODA TEMBAGA BERLAPIS PERAK Pauzi, Gurum Ahmad; Rianita Baiti; Supriyanto, Amir; Junaidi
Journal of Energy, Material, and Instrumentation Technology Vol 6 No 2 (2025): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v6i2.180

Abstract

The overpotential characteristics of a high-voltage seawater battery system were systematically analyzed, employing a silver-coated copper cathode and a zinc anode. This study evaluated the system's electrochemical performance using a quantitative approach based on the Butler-Volmer equation. The exchange current density and the time-dependent overpotential profile were estimated to gain insight into the electrochemical kinetics involved. A total of 20 voltaic cells were assembled in a series-parallel configuration and subjected to loaded operation for 55 minutes. During the experiment, an exponential decrease in current—from 2.6 mA to 0 mA—was recorded, which was attributed to internal resistance and charge transfer limitations. The modeling process was carried out using nonlinear fitting, through which the exchange current density was found to range between 0.15 and 0.3 mA/cm². The charge transfer coefficient (α) was also determined to be approximately 0.5, indicating a relatively balanced rate of anodic and cathodic reactions. It was demonstrated that the silver coating on the copper cathode significantly enhanced electrochemical activity by improving the catalytic surface, thereby increasing both current response and long-term system stability. These results highlight the potential of surface-modified electrodes in advancing seawater battery technologies.
Rancang Bangun Alat Deteksi Kadar Kolesterol Dalam Darah Dengan Teknik Non Invasive Berbasis Mikrokontroler Wemos D1 R1 Yuniar, Noeris; Supriyanto, Amir; Ayu, Humairoh Ratu; Suciyati, Sri Wahyu
Journal of Energy, Material, and Instrumentation Technology Vol 6 No 3 (2025): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.213

Abstract

Cholesterol level checks are generally performed either invasively or using a portable blood test strip. It requires a long laboratory analysis time and causes pain in the body, so a non-invasive tool is needed to check cholesterol levels. The study aims to detect cholesterol levels in the blood with a non-invasive technique based on the Wemos D1 R1 Microcontroller using the DS100A Oximeter Sensor. This tool is equipped with a Liquid Crystal Display (LCD) as a cholesterol level display and an LED light as a cholesterol level indicator that will light up red when cholesterol is high (>=240 mg/dL), light up yellow when cholesterol is at the high limit (200-239 mg/dL), and light up green when cholesterol is normal (<=200 mg/dL). Cholesterol level measurement is done by utilizing the red LED light emission on the sensor attached to the finger. Then, the photodiode will capture the light intensity from the red LED into a voltage value. A 10-bit ADC on the microcontroller then reads the voltage value. The ADC value was then converted into a cholesterol level in milligrams per deciliter (mg/dL) using a linear regression equation. The designed device is capable of detecting cholesterol levels in the range of 150-240 mg/dL. Test results indicate that the non-invasive cholesterol level test device has been successfully developed, with a precision of 98.85% and an error of 1.15%. Accuracy testing yielded a value of 97.14% with an error of 2.86%.
Pelatihan Penyusunan Standar Operasional Prosedur (SOP) Berstandar ISO 9001 untuk Standardisasi Pengelolaan Laboratorium IPA SMP Supriyanto, Amir; Suciyati, Sri Wahyu; Pauzi, Gurum Ahmad; Junaidi, Junaidi; Aprilia, Ayu
Jurnal Abdimas Kartika Wijayakusuma Vol 6 No 3 (2025): Jurnal Abdimas Kartika Wijayakusuma
Publisher : LPPM Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jakw.v6i3.1081

Abstract

Laboratorium merupakan jantung dari pembelajaran IPA. Pembelajaran IPA yang menyeluruh wajib mengaktifkan penggunaan laboratorium. Namun, pengelolaan Laboratorium IPA khususnya di SMP Kabupaten Lampung Timur belum terstandarisasi dengan baik. Standarisasi dalam bentuk SOP merupakan hal penting untuk panduan pelaksanaan praktikum, pengelolaan alat dan bahan hingga masalah keselamatan. Merujuk dari fenomena tersebut, tujuan pelatihan ini untuk meningkatkan kemampuan guru IPA dalam penyusunan SOP berstandar internasional ISO 9001:2015. Peserta pelatihan mencakup guru-guru IPA SMP di Kabupaten Lampung Timur. Pelatihan menerapkan tiga metode yaitu pemberian materi, praktik penyusunan SOP, dan presentasi dokumen. Evaluasi kegiatan untuk mengukur pemahaman peserta diukur dengan ujian pre-test dan post-test dan diperoleh kenaikan rata-rata sebesar 43,22%. Selain itu, pelatihan ini berhasil menghasilkan enam dokumen SOP yang telah berstandar ISO 9001:2015. Hasil ini menjadi indikator tercapainya tujuan pelatihan. Dokumen SOP berstandar ISO 9001:2015 yang telah disusun peserta siap diimplementasikan di sekolah masing-masing.
Integration of magnus thermodynamic parameters and machine learning algorithms in rainfall prediction Aprilia, Ayu; Zakiya, Hanifah; Pauzi, Gurum Ahmad; Supriyanto, Amir; Syafriadi, Syafriadi
ORBITA: Jurnal Pendidikan dan Ilmu Fisika Vol 11, No 2 (2025): November
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/orbita.v11i2.34505

Abstract

Atmospheric physics is very useful in predicting rainfall, particularly for analyzing air saturation conditions as a prerequisite for condensation. This study aims to model rainfall prediction using thermodynamic parameters, namely relative humidity (RH) and dew point temperature difference (ΔT). These parameters were collected from BMKG Lampung meteorological data (2022–2024) and processed using the Magnus equation. ΔT is important as a sensitive indicator of air unsaturation. The data were statistically analyzed and modeled using a Gradient Boosting Classifier. The results obtained indicate a strong correlation between RH and ΔT and rainfall events (point-biserial correlation of 0.475). Furthermore, ΔT during rainfall is lower (average 2.87°C) and stable, indicating near-saturation conditions. During the evaluation stage, the model achieved 76% accuracy and 84% recall during rainfall. The model's good performance proves the effectiveness of physical parameters as predictive features. Finally, the model was implemented in a Flask-based web application for practical accessibility.
Waste-Derived Cellulose Nanocrystal–ZnO Nanocomposites Prepared by a One-Pot Green Synthesis: Structural, Optical, and Photocatalytic Properties Suciyati, Sri Wahyu; Prastica, Lusia; Supriyanto, Amir; Suprihatin, Suprihatin; Manurung, Posman; Suharyadi, Edy
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 14 No 2 (2025): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v14i2.28456

Abstract

Nanocellulose-based CNC–ZnO nanocomposites from garlic peel waste were successfully synthesized as environmentally friendly photocatalysts. This study aimed to valorize kitchen waste as a source of cellulose and combine it with ZnO through a one-pot precipitation method using CNC and Zn(NO₃)₂ as ZnO precursors. Structural, morphological, and optical properties were characterized using FTIR, XRD, SEM–EDX, XRF, and UV–Vis DRS. The XRD pattern showed a crystalline cellulose peak at 2θ ≈ 22.22° with a crystallite size of approximately 20.65 nm, while the CNC–ZnO nanocomposites showed crystallite sizes in the range of 23.93–31.12 nm. Peak shifts and broadening suggested interfacial interactions between CNC and ZnO, and the wurtzite ZnO reflections displayed a broad shoulder due to overlap with the cellulose peak and the high dispersion of ZnO within the CNC matrix. SEM–EDX analysis revealed a rod-like bundled agglomerated morphology, with the presence of Zn confirmed by EDX (39.23%) and XRF (~8.36%). The CNC–ZnO0.9 sample exhibited a band gap energy of 2.95 eV. Photocatalytic test against methyl orange (10 ppm) increased with UV irradiation time, achieving net photocatalytic efficiencies of 79.12% and 63% in the first and second cycles after 120 min, respectively. Kinetic analysis indicated that the degradation data were better described by a pseudo-second-order model with a rate constant of 0.0374 min⁻¹, indicating the role of surface interactions and the availability of active sites. These results confirmed the potential of CNC–ZnO nanocomposites derived from garlic peel waste as photocatalysts for organic dye degradation
Co-Authors Abdurrahman, Ahmad Faruq Abidin, Ramadhani Aprilia, Ayu Apriyanto, Donni Kis Dika, Mahardika Setiawan Febriyanti, Nur Tasya Humairoh Ratu Ayu Junaidi Junaidi Kurniawansyah, Rifki Mohamad Nugraha, Iqbal Adi Pauzi, Gurum Ahmad Posman Manurung Prastica, Lusia Pubiyanti, Intan Pulung Karo-Karo Putra, Dio Aditia Putri, Risa Amelia Rianita Baiti Septiani, Elsyana Situmorang, Elfrina Sri Wahyu Suciyati Suciati, Sri Wahyu Suharyadi, Edy Suprihatin Suprihatin Surtono, Arif Syafriadi Syafriadi Yuniar, Noeris Zakiya, Hanifah