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All Journal PROSIDING SEMINAR NASIONAL Berkala Fisika Indonesia : Jurnal Ilmiah Fisika, Pembelajaran dan Aplikasinya TARBIYA : Journal Education in Muslim Society Jurnal Pendidikan Fisika FKIP UM Metro Phi : Jurnal Pendidikan Fisika dan Terapan Jurnal Fisika Unand JFA (Jurnal Fisika dan Aplikasinya) Edufisika: Jurnal Pendidikan Fisika JOURNAL ONLINE OF PHYSICS Jurnal Penelitian Pembelajaran Fisika Journal of ICSAR Journal of Geoscience, Engineering, Environment, and Technology International Journal of Science and Applied Science: Conference Series Jurnal Pendidikan Informatika dan Sains JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) JIPF (Jurnal Ilmu Pendidikan Fisika) Journal of Physics: Theories and Applications Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) Al-MARSHAD: Jurnal Astronomi Islam dan Ilmu-Ilmu Berkaitan Spektra: Jurnal Fisika dan Aplikasinya SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Journal of Physics and Its Applications Jurnal Pendidikan Fisika dan Teknologi Jurnal Kumparan Fisika Buletin Ilmiah Sarjana Teknik Elektro Indonesian Review of Physics (IRiP) Jurnal Fisika Indonesia Indonesian Journal of Electrical Engineering and Computer Science Navigation Physics : Journal of Physics Education Jurnal Penelitian Sains dan Pendidikan (JPSP) Prosiding Seminar Nasional Program Pengabdian Masyarakat Jurnal Materi dan Pembelajaran Fisika PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Engineering Science Letter Journal of Novel Engineering Science and Technology Bincang Sains dan Teknologi JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah)
Yudhiakto Pramudya
Universitas Ahmad Dahlan
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Penentuan Frekuensi Osilasi pada Dua Pendulum Terkopel Menggunakan Arduino Uno dengan Sensor Ultrasonik Habib, Abdul Muis; Pramudya, Yudhiakto
Jurnal Fisika Unand Vol 10 No 1 (2021)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.10.1.15-21.2021

Abstract

Penelitian ini bertujuan untuk menentukan nilai frekuensi osilasi pada dua pendulum terkopel menggunakan Arduino Uno dengan sensor ultrasonik. Gerak osilasi pendulum yang berbeda yaitu pada gerak sefase dan beda fase. Sensor ultrasonik dihubungkan pada board Arduino Uno yang kemudian dihubungkan pada PC menggunakan kabel USB. Proses pengambilan data dimulai dengan menggerakkan pendulum secara sefase dan menekan tombol conect pada aplikasi PLX-DAQ untuk memperoleh data yang secara otomatis akan ditampilkan pada microsoft excel. Selanjutnya, data yang diperoleh dilakukan analisis fitting data, kemudian hasilnya di-plot dalam bentuk grafik. Hasil menunjukkan perbedaan nilai frekuensi osilasi pada perbandingan pengukuran menggunakan tracker dan sensor ultrasonik. secara eksperimen menggunakan tracker, nilai ω sebesar 4,62 Hz dan secara teori nilai ω sebesar 5,66 Hz dengan ralat 18,4 %. Sedangkan pada sensor ultrasonik diperoleh nilai ω secara eksperimen sebesar 4,95 Hz dan secara teori sebesar 5,66 Hz dengan ralat 12,55%. Perbandingan pengukuran tersebut dapat dilihat bahwa nilai ω secara eksperimen menggunakan sensor ultrasonik lebih besar atau mendekati pada nilai ω secara teori. Artinya pengukuran frekuensi osilasi dengan menggunakan sensor ultrasonik juga memiliki tingkat akurasi yang baik sehingga layak digunakan dalam eksperimen osilasi terkopel. This study aims to determine the value of the oscillation frequency in two coupled pendulums using Arduino Uno with an ultrasonic sensor. The different pendulum oscillations are in phase and phase difference. The ultrasonic sensor is connected to the Arduino Uno board which is then connected to the PC using a USB cable. The data collection process begins by moving the pendulum in phases and pressing the connect button on the PLX-DAQ application to obtain data which will automatically be displayed on Microsoft Excel. Furthermore, the data obtained were analyzed using a fitting data analysis, then the results were plotted in graphical form. The results show the difference in the value of the oscillation frequency in the comparison of measurements using a tracker and ultrasonic sensor. experimentally using a tracker, the value of ω is 4.62 Hz and in theory, the value of ω is 5.66 Hz with an error of 18.4%. While the ultrasonic sensor obtained an experimental ω value of 4.95 Hz and theoretically 5.66 Hz with 12.55% error. Comparison of these measurements can be seen that the value of ω experimentally using an ultrasonic sensor is greater or closer to the value of ω in theory. This means that the measurement of oscillation frequency using an ultrasonic sensor also has a good level of accuracy so it is suitable to be used in coupled oscillation experiments.
Numerical Analysis of the Doppler Effect in Circular Motion with Modulated Angular Velocity Using Python Firaina, Radha; Pramudya, Yudhiakto
Journal of Physics and Its Applications Vol 7, No 4 (2025): November 2025
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v7i4.26584

Abstract

This study presents a numerical simulation of the Doppler effect for an object in circular motion with time-modulated angular velocity, developed using the Python programming language. The model computes angular velocity, angular position, and observed frequency as functions of time based on a modified Doppler formulation. Two simulation models were implemented: an interactive mode using an IPython widget slider to vary the modulation constant (0 ≤ b ≤ 1), and a comparative mode evaluating three representative modulation strengths (b = 0.15, 0.20, 0.25). The results demonstrate that the modulation of angular velocity produces periodic fluctuations in the observed frequency, consistent with theoretical predictions. Sensitivity testing confirmed numerical stability (∆f < 0.01 Hz) with smaller time steps (∆t = 0.01 s), validating the robustness of the computational model. These findings quantitatively reveal the relationship between modulation parameters and Doppler frequency shifts, providing a reproducible and pedagogically effective framework for studying non-uniform circular motion and its physical implications in astrophysical and acoustic systems.
Comparative Effectiveness of Digital and Conventional Oscilloscopes in Resonance Tube Practicum Susanti, Desi; Pramudya, Yudhiakto; Ishafit, Ishafit
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 11 No 2 (2025): July - December
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpft.v11i2.10351

Abstract

This study investigates the comparative effectiveness of digital and conventional oscilloscopes in physics learning, focusing on the resonance tube practicum as a medium for understanding acoustic wave phenomena. Digital tools such as the Soundcard Oscilloscope have been proposed as innovative and low-cost alternatives to conventional laboratory equipment, addressing resource limitations in many schools. A quantitative quasi-experimental nonequivalent control group design was employed involving two classes of eleventh-grade students. Learning outcomes were measured using validated pre-test and post-test instruments. Data were analyzed through descriptive statistics, Wilcoxon Signed Rank tests for within-group changes, and Mann–Whitney U tests for between-group comparisons due to non-normal data distribution. The experimental group demonstrated significant improvement in learning outcomes (p = 0.003), confirming the effectiveness of the digital tool, while the control group did not (p = 0.094). Although the Mann–Whitney test indicated no significant difference between groups (p = 0.873), N-Gain analysis revealed a notable contrast: a low gain (0.095) in the experimental group versus a decrease (–0.262) in the control group. This research offers novelty by directly comparing digital and conventional oscilloscopes in resonance tube experiments, highlighting the gap between statistical significance and pedagogical effectiveness. The findings demonstrate that the Soundcard Oscilloscope serves as a viable, low-cost alternative that yields greater learning gains than its conventional counterpart. These results underscore the potential of integrating affordable digital laboratory tools with active learning strategies to enhance conceptual understanding, particularly in resource-constrained educational contexts.
Pemanfaatan skala danjon sebagai media untuk mengukur rona gerhana Azmi Khusnani; Adi Jufriansah; Yudhiakto Pramudya; Hamzarudin Hikmatiar; Saharul Saharul; Isma Alip; Konsenius Wiran Wae; Yoman Ribeta Ratu Yohakim
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 8, No 2 (2024): June
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v8i2.22869

Abstract

AbstrakProses terjadinya Gerhana Bulan Total merupakan fenomena astronomi yang  terjadi ketika seluruh permukaan Bulan tertutupi oleh bayang bayang Bumi atau disebut dengan umbra. Hal ini dapat terjadi ketika konfigurasi antara Bulan, Bumi, dan Matahari berada pada satu garis lurus. Oleh karena itu, fenomena Gerhana Bulan Total akan terjadi bersamaan dengan fase Bulan Purnama. Tujuan dilakukannya pengabdian ini adalah untuk mengamati Gerhana Bulan. Metode yang digunakan adalah observasi dan pengisian angket skala Danjon. Pelaksanaan kegiatan dilakukan pada tanggal 8 November 2022 yang dimulai pada pukul 18.00 WITA dengan peserta yang berasal dari masyarakat umum dan masyarakat Universitas Muhammadiyah Maumere. Berdasarkan hasil implementasi diketahui bahwa kondisi cuaca pada saat pelaksanaan sulit dilakukan pengamatan karena kondisi mendung disertai gerimis. Namun, peserta yang mengamati dapat menilai kecerahan gerhana bulan Kata kunci: gerhana bulan total; astronomi; skala danjon; pengamatan. AbstractThe total lunar eclipse process is an astronomical phenomenon that occurs when the Earth's shadow, called the umbra, covers the entire moon's surface. It can happen when the configuration between the Moon, Earth, and Sun is straight. Therefore, the total lunar eclipse phenomenon will co-occur with the complete moon phase. The purpose of doing this service is to observe the Lunar Eclipse. The method used is observation and filling out the Danjon scale questionnaire. The implementation was carried out on November 8, 2022, starting at 18.00 WITA with participants from the general public and the Universitas Muhammadiyah Maumere community. Based on the implementation results, it is known that the weather conditions at the time of observation were challenging because of cloudy conditions accompanied by drizzle. However, participants can judge the brightness of the lunar eclipse. Keywords: total lunar eclipse; astronomy; danjon scale; observation.
STUDY OF SIMILARITY PATTERN OF CHLADNI PLATE VIBRATIONS OF CIRCULAR AND SQUARE GEOMETRY USING SSIM Wako, Mohamed Yusuf; Pramudya, Yudhiakto; Handayani, Dwi Nova Siti
JOURNAL ONLINE OF PHYSICS Vol. 11 No. 2 (2026): JOP (Journal Online of Physics) Vol 11 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v11i2.52531

Abstract

Chladni patterns are formed on plates excited at resonant frequencies and can be observed through the arrangement of particles on the plate surface. This study investigates the structural similarity between numerical and experimental Chladni patterns for circular and square plates using the Structural Similarity Index Measure (SSIM). Numerical vibration mode shapes for circular plates, namely modes (0,1) and (0,2), were obtained by solving the Helmholtz equation using Bessel functions in polar coordinates. Square plate modes (2,1) and (2,2) were modeled using Fourier cosine approximations to the biharmonic plate equation under free-edge boundary conditions. Experimental images were obtained from the Physics Demonstration Archive of the University of California, Santa Barbara, and were preprocessed to match the simulated patterns in terms of grayscale representation, resolution and contrast. Image comparison was performed using Python with the NumPy, SciPy, OpenCV and scikit-image libraries. The SSIM values for corresponding modes indicate a high level of similarity, reaching 0.9326 and 0.9103 for circular plates, and 0.9026 and 0.7517 for square plates, indicating strong structural agreement. Cross-mode comparisons produced significantly lower similarity values for circular plates, but relatively higher values for square plates due to shared Cartesian symmetry. The results demonstrate that SSIM is an effective metric for validating theoretical vibration models and quantifying modal similarity, while providing a practical image-based approach for Chladni pattern analysis.  
Fuzzy Logic-Based Classification of Crescent Moon Images Using Contrast and Thickness Pramudya, Yudhiakto; Firdausy, Kartika; Jufriansah, Adi; Okimustava, Okimustava; Khoirunnisa, Itsnaini Irvina; Murti, Bayu Krisna; Hidayah, Rihmah Alifah; Murinto, Murinto; Maulidan, Muhammad
Buletin Ilmiah Sarjana Teknik Elektro Vol. 8 No. 2 (2026): April
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/biste.v8i2.14964

Abstract

Accurate determination of the crescent moon (hilal) is crucial for establishing the start of lunar months in the Islamic calendar; however, observations are frequently hindered by daylight conditions, atmospheric disturbances, and subjective visual interpretation. This research proposes a fuzzy logic-based classification system to evaluate crescent moon images using contrast and arc thickness as input parameters, providing a transparent, rule-based alternative to black-box machine learning models for hilal visibility assessment. Images were collected on four distinct observation dates (May 28, 2025, August 5, 2024, September 16, 2023, and May 9, 2021) under varying atmospheric conditions and crescent appearances. Each image underwent pre-processing to extract quantitative measures of arc contrast and thickness, which were subsequently fuzzified using triangular and trapezoidal membership functions. A fuzzy inference system employing expert-defined rules was then used to compute a visibility score for each observation. The resulting visibility scores of 0.4691, 0.4604, 0.4689, and 0.4154, respectively, placed all four observations within the “partially visible” category. These findings demonstrate the system's capability to manage observational ambiguity in daylight conditions, showing potential for reliable classification while still requiring validation on larger datasets and clear non-visibility cases, and offering a transparent and interpretable framework to support more consistent and standardized hilal classification for calendrical purposes.
The moon phases influence on the beginning of astronomical dawn determination in Yogyakarta Raisal, Abu Yazid; Pramudya, Yudhiakto; Okimustava, Okimustava; Muchlas, Muchlas
International Journal of Science and Applied Science: Conference Series Vol 2, No 1 (2018): International Journal of Science and Applied Science: Conference Series
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (445.373 KB) | DOI: 10.20961/ijsascs.v2i1.16664

Abstract

In astronomy, there are three types of dawn. They are astronomical, nautical, and civil dawn. The sunlight is starting to appear on the east horizon when the Sun altitude is 18o below the horizon. Hence, there is a change on the sky brightness. The sky brightness can be affected by the moon phases. The sky brightness level is monitored by Sky Quality Meter (SQM). The SQM was installed upward to the zenith. There are 4 locations of measurement in Yogyakarta. The data has been collected for nine months to obtain the complete moon phases. The beginning of astronomical dawn is time when the sky brightness level is starting to decrease. The moving average algorithm was employed to determine the beginning of astronomical dawn. The time when the astronomical dawn begins is compared with the sun altitude calculation. The sun altitude calculation has been done using accurate times software. The difference of the beginning of astronomical dawn by measurement and calculation are 18.61±6.81 minutes, 19.12±3.28 minutes, 31.12±7.76 minutes, and 27.24±8.04 minutes, on the new moon (0), on the first quarter (0.25), on the full moon (0.5) and on the last quarter (0.75), respectively. The weather condition is also contributing to the results.
Comparison of aftershock behavior of the flores sea 12 december 1992 and 14 december 2021 Jufriansah, Adi; Khusnani, Azmi; Pramudya, Yudhiakto; Afriyanto, Mulya
Journal of Physics: Theories and Applications Vol 7, No 1 (2023): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v7i1.71609

Abstract

Over 30 years, the Flores region experienced earthquakes with Mw >7 twice, namely in 1992 and 2021 at shallow depths <60 km. However, the behavior of the aftershocks accompanying the quake has yet to be studied in detail. This research aims to compare the behavior of aftershocks after the main earthquake. This research uses three-lifetime analysis functions, namely, Wilber3, Mustang Web Browser, and comparison of Probability Density Function Hazard. The data used comes from IRIS data and BMKG Online Data. Through graphical analysis, it is known that the data for the time difference for aftershocks follow the RMS distribution, indicating that the Flores Sea aftershock on 12 December 1992 occurred with high intensity on the 3rd and the 6th day after the main earthquake. Meanwhile, the aftershocks in the Flores Sea on 14 December 2021 tended to occur with a more even intensity during the observation period, but the power returned to high on the 7th day
Studi Karakteristik Gelombang Model Tsunami Longsoran Bola Pejal Dengan Bantuan Sensor Ultrasonik dan Arduino pada Variasi Sudut Kemiringan Lereng Putra, Iqbal Adi; Pramudya, Yudhiakto
Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2022: Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2022
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/prosidingsnfa.v7i0.71960

Abstract

Abstract: The tsunami event that occurred in the eruption of Mount Anak Krakatau occurred due to a landslide that interacted with the waters. Landslides occur when there is a change in stable slope conditions to become unstable, instability occurs because the driving force on the slope is greater than the holding force. This research is an experimental simulation of a tsunami caused by a landslide using a solid ball moving on an inclined plane with a variation of the slope of 23.80 and 29.60. This research was conducted in the laboratory to determine changes in water level due to avalanches of solid ball material. Retrieval of data using the help of Arduino Uno along with ultrasonic sensors where the data is analyzed using Microsoft Excel. From the research results at an angle of 23.80, the change in water level on sensor 1 is 0.08 cm, sensor 2 is 0.3 cm, sensor 3 is 0.08 cm with a solid ball speed in water of 1.24 cm/s. Meanwhile, at an angle of 29.60, the change in water level on sensor 1 is 0.08 cm, sensor 2 is 0.08 cm, sensor 3 is 0.75 cm with a solid ball speed in water of 1.74 cm/s.‎Abstrak: Peristiwa tsunami yang terjadi pada letusan gunung anak Krakatau terjadi akibat adanya tanah longsor yang berinteraksi dengan perairan. Tanah longsor terjadi apabila terjadinya perubahan kondisi lereng yang stabil berubah menjadi tidak stabil, ketidakstabilan terjadi karena faktor gaya pendorong pada lereng lebih besar daripada gaya penahannya. Penelitian ini merupakan eksperimen simulasi tsunami akibat tanah longsor dengan menggunakan bola pejal yang bergerak pada bidang miring dengan variasi kemiringan 23,80 dan 29,60. Penelitian ini dilakukan di laboratorium untuk menentukan perubahan ketinggian air akibat longsoran material bola pejal. Pengambilan data menggunakan bantuan Arduino uno beserta sensor ultrasonik yang dimana data tersebut di analisis menggunakan Microsoft excel. Dari hasil penelitian pada sudut 23,80 diperolehlah perubahan ketinggian air pada sensor 1 sebesar 0,08 cm, sensor 2 sebesar 0,3 cm, sensor 3 sebesar 0,08 cm dengan kecepatan bola pejal dalam air sebesar 1,24 cm/s. Sedangkan pada sudut 29,60 diperolehlah perubahan ketinggian air pada sensor 1 sebesar 0,08 cm, sensor 2 sebesar 0,08 cm, sensor 3 sebesar 0,75 cm dengan kecepatan bola pejal dalam air sebesar 1,74 cm/s
Co-Authors Aan Suciarahmat Abdul Muis Habib Abu Yazid Raisal Ade Anggraini Adi Jufriansah Afriyanto, Mulya Alip, Isma Andriyani Andriyani Anggraini, Ade Anisatur Rofiqah, Siti Arfiani Nur Khusna Azmi Khusnani Bayu Nugroho Bayu Nugroho Betty Mauli Rosa Bustam Budi Utama Buliali, Joko Lianto Deidra Robertha Anggraeny Noel Desi Susanti Deti, Maria Dina Rahmah Maulida, Dina Rahmah Donuata, Pujianti Bejahida Dwi Nova Siti Handayani Dwi Nova Siti Handayani Edwin Ariesto Umbu Malahina Eka Syafutri Feri Iskandar Firaina, Radha Habib, Abdul Muis Hamzarudin Hikmatiar Handayani, Dwi Nova Siti Hasbullah Hasbullah Hayyuningtias, Riza Hidayah, Rihmah Alifah hikmatiar, hamzarudin Ishafit Ishafit Ishafit Jauhari Isma Alip Jauhari, Ishafit Kabul Setiya Budi Kartika Firdausy Khoirunnisa, Itsnaini Irvina Konsenius Wiran Wae Lazwardi, Ahmad Leto, Kristina Theresia Lukmanul Hakim Lukmanul Hakim M. Burhanuddin Latief M. Khairul Ardi Mahfudz, Khawarizmy Margiono Marini Amalia Ocvianti Maulidan, Muhammad Moh. Irma Sukarelawan Moh. Toifur Muchlas , Muchlas - Muchlas Muchlas Muchlas Muchlas Murinto Murinto Murti, Bayu Krisna Mustofa Ahyar Mustofa Ahyar Nur Hamida Siregar Nur Ikhwan Nurfitni, Diana Nurrahman, Arip Okimustava Okimustava Okimustava Okimustava Putra, Iqbal Adi Raharja, Endra Putra Rahmatul Bayyinah, Rahmatul Reza Ariefka Ricka Tanzilla Ricka Tanzilla Riza Hayyuningtias Rizky Bayu Kurniawan Sabarudin Saputra Saharul Saharul Saharul, Saharul Sahlan Sahlan Samana, Fazaki Ramadhani Anwar Saumarachmawati, Putri Ani Servia Shalihin, Rahmat Ryadhush Sina, Tuti Asmianti Siregar, Nur Hamida Siswoyo, Wuryanto Puji Sukatin, Sukatin Suparwoto Suparwoto Suparwoto Suparwoto Suparwoto Suparwoto Suyadi Suyadi Syafutri, Eka Sya’bania, Nursina Tanzilla, Ricka Ulinnuha Yudiansa Putra Wae, Konsenius Wiran Wahab, Dedi Suwandi Wahyu Saputra Wako, Mohamed Yusuf Wandira, Cintha Ayu Widodo Widodo Widodo Widodo Yohakim, Yoman Ribeta Ratu Yoky Novra Silta Yoman Ribeta Ratu Yohakim Z. Zulfakriza Zulfakriza, Zulfakriza