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A Force Field Simulation Approach to Analyze the Molecular Structure Stability of Cyanidin-3-Glucoside Using Avogadro: A Preliminary Study Putro, Permono Adi; Wulandari, Desi; Wulandari, Devia Putri; Nurfaidah, Fitriah; Ahdan, M Farid; Chaerunnisa, Seviana; Octaviani, Vina Umaya
TIME in Physics Vol. 2 No. 2 (2024): September
Publisher : Universitas Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/timeinphys.2024.v2i2p66-76

Abstract

Cyanidin-3-glucoside (C3G) is a flavonoid compound that is an antioxidant and natural colorant widely found in berries and vegetables such as red cabbage. This study aims to explore the structural stability of C3G using computer simulations based on force field theory through Avogadro software. In this study, the Universal Force Field (UFF), Merck Molecular Force Field (MMFF94), and General Amber Force Field (GAFF) methods were used to analyze the stability of C3G. The energy optimization results showed that the Ghemical method produced a more stable structure than other methods, although there was a discrepancy with GAFF. The GAFF method was more stable than UFF, but required more energy to achieve stability. Overall, the difference in force field methods affected the molecule's stability through optimization energy and structure parameterization variations, which affected the distance and angle of atomic bonds. These findings provide an efficient picture of the stable conformation of C3G, which can be applied in the food, health, and cosmetic industries.
Calibration and Signal Processing of MPU6050 Sensor to Improve Navigation Stability of Autonomous Underwater Vehicle (AUV) Putro, Permono Adi; Pinardi, Kuntjoro; Ramadhan, Aditia; Zein, Aulia Sultan Rafael; Nurfalah, Yokeu
TIME in Physics Vol. 3 No. 1 (2025): March
Publisher : Universitas Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/timeinphys.2025.v3i1p31-44

Abstract

A stable and accurate navigation system is crucial for the operation of Autonomous Underwater Vehicles (AUVs), especially in underwater environments where GPS signals are unavailable. This study aims to enhance AUV navigation performance by optimizing the use of a low-cost inertial sensor, the MPU6050, through calibration and signal processing techniques. The methodology includes reading raw data from accelerometer and gyroscope sensors, performing static calibration to reduce bias and noise, applying Fast Fourier Transform (FFT) for signal analysis, and implementing digital filters such as low-pass and high-pass filters. The raw data reveal significant deviations due to gyroscope bias and accelerometer noise. Static calibration effectively reduces systematic errors, although residual biases remain. FFT analysis identifies dominant frequency components in each axis, while digital filtering helps eliminate irrelevant frequency noise. Precision testing demonstrates that the sensor produces relatively stable data post-calibration, with the Z-axis showing higher deviation compared to the X and Y axes. The combination of calibration and signal processing methods significantly improves the data quality and reliability of the MPU6050 sensor. This research contributes to the development of more efficient and low-cost AUV navigation systems and supports the broader application of simple IMU sensors in underwater exploration and maritime technologies.
Analisa Kandungan Boraks pada Tahu dengan Menggunakan Texture Analyzer dan Spektrometer Putro, Permono Adi; Susanti, Novita Dwi; Wulandari, Devia Putri
Jurnal Riset Fisika Indonesia Vol 5 No 2 (2025): Juni
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v5i2.5844

Abstract

Food safety is a critical issue in ensuring public health, especially in preventing contamination from harmful substances illegally added to food. One such hazardous additive is borax, which is sometimes used by unscrupulous food producers to preserve texture and shelf life, despite its known toxicity and prohibition in food products. This study aims to detect the presence of borax in tofu, a widely consumed protein source, by utilizing two analytical tools such as a Texture Analyzer and a Spectrometer. The Texture Analyzer was employed to evaluate the physical firmness of tofu, as borax is known to increase its hardness. The Spectrometer was used to confirm the chemical presence of borax. Results indicated that tofu samples containing borax showed significantly firmer textures compared to control samples, and the spectrometric analysis successfully detected borax compounds. These findings demonstrate that both instruments are effective in identifying borax contamination. The study recommends the sustainable development of rapid and accurate detection methods for other hazardous additives to enhance food safety monitoring and enforcement practices.
A Bibliometric Analysis of Carbon Dots in Sensors Application Putro, Permono Adi; Hardhienata, Hendradi; Isnaeni, Isnaeni; Ahmad, Faozan; Khaerudini, Deni Shidqi; Prasetyo, Andhika Prima; Maddu, Akhiruddin
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 12 No. 2 (2022)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v12n2.p138-155

Abstract

The exponential increase in carbonaceous-based research has prompted the scientific community to apply it to numerous value-added applications. This paper aimed to systematically analyze the comprehensive contributions clusters of publications per year, country, institution, authors, and keywords-wise by using a quantitative review technique called bibliometric analysis. The data was retrieved from the Scopus database to identify the overall scientific trend results with the keyword "carbon dots as a sensor" from 2010 to 2020. The VOSviewer, WordItOut, and Datawrapper are selected as tools for bibliometric analysis and data visualization. In this work, the total citations from the Scopus Core Set and the total citations in the most recent year have only been used for the assessment of highly cited papers. The results showed that after 2014, the number of publications increased significantly with the work related to “carbon dots as sensors.” Thus, comprehensive journals like the Angewandte Chemie - International Edition were the most popular in publishing articles, contributing to almost 6.39% of the research area. The country-wise analysis revealed that China accounted for more than 67.18% of the articles published, followed by the United States and India, comprising 6.24% and 6.13%, respectively. Lastly, keyword cluster analysis revealed five major research hotspots for future discussion. Thus, this analysis provides an important starting point for further studies on research concerning the direction of "carbon dots as a sensor" for positive development in the research area.
PERANGKAP KKM PADA PEMBELAJARAN IPA-FISIKA: ANALISIS SOSIOLOGIS TENTANG BUDAYA TARGET RENDAH PADA SISWA DAN GURU DI SEKOLAH MENENGAH Permono Adi Putro; Asep Priatna; Aji Fauziana Ridwan
Al-Irsyad Journal of Physics Education Vol 5 No 1 (2026): Al-Irsyad Journal of Physics Education
Publisher : Sekolah Tinggi Keguruan dan Ilmu Pendidikan Darud Da'wah Wal Irsyad Pinrang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58917/ijpe.v5i1.643

Abstract

Di sekolah menengah Indonesia, praktik penetapan tujuan pembelajaran yang rendah untuk mata pelajaran sains dan fisika masih menjadi masalah sosial, terutama ketika Kriteria Kelulusan Minimum (KKM) dipandang sebagai tujuan pembelajaran utama. Tujuan artikel ini adalah untuk meneliti bagaimana KKM berfungsi sebagai jebakan struktural dan psikologis yang menciptakan mentalitas "sekadar lulus" di kalangan pendidik dan siswa, serta konsekuensi yang ditimbulkannya terhadap pertumbuhan literasi sains, keterampilan berpikir tingkat tinggi (HOTS), dan kemampuan pemecahan masalah. Teori motivasi belajar (efikasi diri, ekspektasi-nilai, dan pola pikir pertumbuhan), strategi pendidikan, dan temuan empiris tentang pembelajaran sains-fisika semuanya termasuk dalam tinjauan pustaka konseptual studi ini. Temuan studi menunjukkan bahwa KKM yang berorientasi administratif sering digunakan sebagai batasan simbolis untuk upaya belajar, yang menurunkan harapan akademis, mendorong teknik pembelajaran minimalis, dan memfokuskan pengajaran fisika pada hafalan dan pemecahan masalah rutin. Dalam keadaan ini, eksplorasi konsep, penalaran ilmiah, dan pemecahan masalah kontekstual semuanya dibatasi oleh KKM. Konsekuensi praktis dari penelitian ini menyoroti perlunya memposisikan ulang KKM sebagai instrumen diagnostik yang meningkatkan kompetensi ilmiah siswa, meningkatkan standar akademik, dan mendorong pembelajaran berbasis tantangan.
Purification and Characterization of Monazite from Bangka using Mechanical-Magnetic Separation Method Herman Aldila; Anisa Indriawati; Permono Adi Putro
Jurnal Penelitian Pendidikan IPA Vol 10 No 5 (2024): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i5.6644

Abstract

In this research, the purification and characteristics of monazite, a by-product of the tin ore enrichment process. Monazite is given pre-treatment to monazite sand using the mechanical-magnetic separation method to increase the content of rare earth metal elements. Based on the results of the analysis of monazite samples from Tin mine tailings concentrate that has been purified, the dominant elements of the highest rare earth metals are cerium (Ce), lanthanum (La), neodymium (Nd), and Yttrium (Y). The mechanical-magnetic separation method, monazite from Tin mine tailings concentrate can have higher purity. These rare earth metal elements can be further extracted or synthesized; and used as supporting or even main materials in developing advanced technological industries.
Edukasi dan Pemberdayaan Kelompok Petani Subang melalui Inovasi Pupuk Kalsium dari Limbah Rumah Tangga dan UMKM Permono Adi Putro; Sri Maria Ulfha; Ranggi Radiyanti; Tedi Sumardi
Jurnal Pengabdian Masyarakat Vol. 4 No. 1 (2026): Januari-JPM
Publisher : PDPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58818/jpm.v4i1.130

Abstract

Kabupaten Subang memiliki potensi besar dalam sektor pertanian, namun petani lokal masih menghadapi kendala biaya produksi akibat mahalnya pupuk kimia. Kegiatan pengabdian ini bermitra dengan Kelompok Tani Rumah Petani Nelayan Nusantara (RPNN) di Kelurahan Cigadung, Subang, untuk memberikan solusi inovatif melalui pemanfaatan limbah kulit telur sebagai bahan dasar pupuk kalsium. Limbah ini banyak dihasilkan oleh rumah tangga dan UMKM kuliner, namun belum dimanfaatkan secara optimal, padahal mengandung lebih dari 90% CaCO₃ yang bermanfaat bagi tanah. Program dilaksanakan selama dua hari dalam lima tahapan: sosialisasi, pelatihan (seminar dan praktik), penerapan teknologi sederhana, pendampingan dan evaluasi, serta perencanaan keberlanjutan. Delapan peserta mengikuti pelatihan dan menunjukkan peningkatan pengetahuan tentang pupuk kalsium, perbedaan pupuk organik dan anorganik, serta potensi limbah lokal. 87,5% peserta menyatakan tertarik mengaplikasikan pupuk ini, dan seluruhnya percaya dapat menekan biaya produksi. Edukasi berbasis praktik terbukti efektif dalam meningkatkan kesadaran dan motivasi petani terhadap inovasi berbasis limbah.