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Utama Alan Deta
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Jurnal Penelitian Fisika dan Aplikasinya (JPFA)
Published by Universitas Negeri Surabaya
ISSN : 20879946     EISSN : 24771775     DOI : https://doi.org/10.26740/jpfa
Core Subject : Science, Education,
Astronomy Earth & Planetary Sciences Education Materials Science & Nanotechnology Physics
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) is available for free (open access) to all readers. The articles in JPFA include developments and researches in Physics Education, Classical Physics, and Modern Physics (theoretical studies, experiments, and its applications), including: Physics Education (Innovation of Physics Learning, Assessment and Evaluation in Physics, Media of Physics, Conception and Misconceptions in Physics, hysics Philosophy anPd Curriculum, and Psychology in Physics Education); Instrumentation Physics and Measurement (Sensor System, Control System, Biomedical Engineering, Nuclear Instrumentation); Materials Science (Synthesis and Characteristic Techniques, Advanced Materials, Low Temperature Physics, and Exotic Material); Theoretical and Computational Physics (High Energy Physics, Gravitation and Cosmology, Astrophysics, Nuclear and Particle Phenomenology, and Computational and Non-Linear Physics); and Earth Sciences (Geophysics and Astronomy).
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 437 Documents
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CHARACTERIZATION OF TEMPERATURE RESPONSE OF ASYMMETRIC TAPERED-PLASTIC OPTICAL FIBER-MACH ZEHNDER INTERFEROMETER Yulianti, Ian
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 10, No 1 (2020): Articles in Press
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v10n1.p%p

Abstract

Performance characterization of simple and low cost Mach Zehnder interferometer (MZI) using step index plastic optical fiber (SI-POF) to temperature variation is presented.  The sensor consists of two tapers at several distance forming interferometer.  The first taper was designed to be steep to allow excitation of cladding modes, while the second taper was gradual to supress power loss.  Characterizations were done in terms of sensitivity, hysteresis and repeatability by analysing the output spectrums recorded by spectrometer at various environment temperature which are 35oC to 85oC with increment of 10oC.  The results showed that the sensor has sensitivity of 0.0431 nm/oC and correlation coefficient of 0.9965.  Hysteresis of 6.9×10-3was observed.  In terms of repeatability, the sensor shows maximum deviation of ±3oC which was mainly resulted from fluctuation of oven temperature. Despite its high deviation, the sensor has advantages of simple fabrication process, low cost, robust and low power loss which make it as a good candidate for temperature sensor.
CHARACTERIZATION OF TEMPERATURE RESPONSE OF ASYMMETRIC TAPERED-PLASTIC OPTICAL FIBER-MACH ZEHNDER INTERFEROMETER Yulianti, Ian
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 10, No 1 (2020): Articles in Press
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v10n1.p%p

Abstract

Performance characterization of simple and low cost Mach Zehnder interferometer (MZI) using step index plastic optical fiber (SI-POF) to temperature variation is presented.  The sensor consists of two tapers at several distance forming interferometer.  The first taper was designed to be steep to allow excitation of cladding modes, while the second taper was gradual to supress power loss.  Characterizations were done in terms of sensitivity, hysteresis and repeatability by analysing the output spectrums recorded by spectrometer at various environment temperature which are 35oC to 85oC with increment of 10oC.  The results showed that the sensor has sensitivity of 0.0431 nm/oC and correlation coefficient of 0.9965.  Hysteresis of 6.9×10-3was observed.  In terms of repeatability, the sensor shows maximum deviation of ±3oC which was mainly resulted from fluctuation of oven temperature. Despite its high deviation, the sensor has advantages of simple fabrication process, low cost, robust and low power loss which make it as a good candidate for temperature sensor.
ANALISIS DISTRIBUSI SUHU PADA PELAT DUA DIMENSI DENGAN MENGGUNAKAN METODA BEDA HINGGA Supardiyono, S
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 1, No 2 (2011)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v1n2.p33-39

Abstract

Telah dilakukan penelitian tentang komputasi distribusi suhu pada persamaan Laplace dua dimensi dengan metode beda hingga menggunakan MATLAB 7.0. Tujuan penelitian adalah menganalisis distribusi suhu pada tiap titik dalam dua dimensi pada persamaan Laplace. Metode penelitian yang digunakan yakni menyusun konsep persamaan Laplace, mengidentifikasi permasalahan, persamaan Laplace dua dimensi yang digunakan, penyelesaian numerik dengan metode beda hingga, uji kebenaran dan data awal, analisis, penerapan. Hasil penelitian menunjukkan bahwa visualisasi berupa grafik pada program MATLAB untuk menyelesaikan persamaan Laplace telah ada kecocokan dengan grafik pada teori tentang aliran suhu, sehingga antara hasil teori dan numerik berupa program tidak ada perbedaan yang signifikan. Bahkan hasilnya berdasarkan grafik diatas menunjukkan bahwa antara numerik dengan analitik saling berhimpit atau mendekati. Hal ini dapat dilihat dari selisih atau tingkat error nilai T antara numerik dengan analitik tidak terlalu jauh perbedaannya.
Elemental and Infrared Characterization of Contaminants in Second-Hand Cotton Garments From Flea Markets In Valencia City, Bukidnon, Philippines Butanas, Marilou Auxtero Pedroso; Butanas Jr., Bienvenido Masirin
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 8, No 1 (2018)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v8n1.p10-16

Abstract

The use of Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) characterizations have been indispensable techniques in distinguishing purity of the samples. These techniques give spectra that will be used to analyze the composition, morphology, purity, among others, of the material. One of its interesting applications is to assess elemental and chemical contaminations on second hand clothing. In this study, second hand (Ukay-Ukay) cotton garments from selected flea market sites in Valencia City, Bukidnon, Philippines were examined quantitatively for microbial and chemical contaminations by using FTIR, SEM, and EDX. The FTIR results obtained in both sites showed broad peaks at ~3336 cm-1 attributed to OH functional group, and absorption peaks at 2901.30 cm-1 associated to C-H bond, 1159.70 cm-1, 1107.44 cm-1 and 1053.82 cm-1 attributed to the stretches of CO bond. All of them were characteristics of cotton material. We observed degradation of the cotton material on both sites evident in the decreasing intensity of OH stretching (at peaks around ~3334 cm -1 [site A] and ~3332 cm -1 [site B]) and C-O stretching (around ~1500-1700 cm-1). These were due to the presence of microorganisms such as fungi (e.g. Aspergillus species). The degradation was also observed in the SEM results. Furthermore, peaks related to carboxylate contaminants were observed in both sites around ~1600 – 1800 cm-1 that may be caused by the exposure of the cotton garments in hydrochloric acid (HCl). In general, the characterization results on both sites indicated traces of microorganisms and that the second-hand cotton clothes were contaminated by hazardous chemicals.
The Segmentation of Neutron Digital Radiography Image through the Edge Detection Method Amalia, Ayu Fitri; Budhi, Widodo
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 10, No 1 (2020)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v10n1.p11-21

Abstract

The digital image processing is one way to manipulate one or more digital images. Image segmentation has an essential role in the field of image analysis. The aim of this study was to develop an application to perform digital image processing of neutron digital radiographic images, hoping to improve the image quality of the digital images produced. The quality of edge detection could be used for the introduction of neutron digital radiographic image patterns through artificial intelligence. Interaction of neutrons with the matter mainly by nuclear reaction, elastic, and inelastic scattering. A neutron can quickly enter into a nucleus of an atom and cause a reaction. It is because a neutron has no charge. Neutrons can be used for digital imaging due to high-resolution information from deep layers of the material. The attenuated neutron beam in neutron radiography are passing through the investigated object. The object in a uniform neutron beam is irradiated to obtain an image neutron. The technique used in segmenting the neutron radiography in this study was a digital technique using a camera with a charge-coupled device (CCD), which was deemed more efficient technique compared to the conventional one. Through this technique, images could be displayed directly on the monitor without going through the film washing process. Edge detection methods were implemented in the algorithm program. It was the first step to complement the image information where edges characterize object boundaries. It is useful for the process of segmenting and identifying objects in neutron digital radiography images. The edge detection methods used in this study were Sobel, Prewitt, Canny, and Laplacian of Gaussian. According to the results of the image that have been tested for edge detection, the best image was carried out by the Canny operator because the method is more explicit. The obtained edges were more connected than the other methods which are still broken. The Canny technique provided edge gradient orientation which resulted in a proper localization.
PENGATURAN KESTABILAN HOVER PADA QUADROTOR MENGGUNAKAN KONTROL BACKSTEPPING PD PI Jumiyatun, J; Effendi, Rusdhianto; Susila, Joko
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 5, No 1 (2015)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v5n1.p21-27

Abstract

Quadrotor merupakan jenis pesawat Unmanned Aerial Vehicle (UAV) yang digerakkan oleh 4 buah motor yang terletak di ujung badan utama .Hover merupakan fase terbang yang sangat penting dan harus dimiliki quadrotor agar pemanfaatannya dapat maksimal, dimana ketinggian dan sudut adalah tetap. Kontrol hover merupakan prioritas utama dalam setiap upaya pengendalian quadrotor baik pada fase take-off, landing, dan trajectory. Selain itu, quadrotor merupakan sistem kompleks yang tidak stabil dan dapat menjadi sulit untuk terbang tanpa adanya sistem kontrol. Untuk mengatasi masalah tersebut sangat dibutuhkan suatu algoritma kontroler yang mampu mempertahankan kondisi agar dapat terbang dengan ketinggian dan sudut yang tetap. Kontroller yang digunakan adalah backstepping PD PI . Dari hasil simulasi menunjukkan bahwa kestabilan roll dan pitch, dan yaw dapat tercapai sesuai setpoint yaitu nol dan pengujian ketinggian mendekati tiga karena masih ada error steady state yaitu 0.0132m.
Utilization of Maple-based Physics Computation in Determining the Dynamics of Tippe Top Ariska, Melly; Akhsan, Hamdi; Zulherman, Zulherman
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 8, No 2 (2018)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v8n2.p123-131

Abstract

Tippe top is an example of simple moving system of rigid body with non-holonomic constraint, but the analysis of this system is not simple. A tippe top equation has been derived with Routhian reduction method and Poincaré equation, and physics computation in finding numeric solution of the dynamics of the tippe top has also been utilized by using Maple program. However, the Poincaré equation required that quasi-coordinate of the quasi-velocity is found, while in the case of the dynamics of tippe top, there is not any exact solution of the quasi-coordinate of the quasi-velocity was found. Therefore, the tippe top equation should be reduced to solve the problem. In this research, Routhian reduction was employed so that the Routhian reduction-based Poincaré equation was used to derive the tippe top equation. The method was able to derive a tippe top equation on a flat plane and tube inner surface clearly represented differential equations.
Introduction, Author Guidelines, and Table of Contents JPFA, Editor
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 6, No 2 (2016)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v6n2.pii-iv

Abstract

The Existence of Fourier Coefficients and Periodic Multiplicity Based on Initial Values and One-Dimensional Wave Limits Requirements Jufriansah, Adi; Khusnani, Azmi; Hermanto, Arief; Toifur, Mohammad; Prasetyo, Erwin
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 10, No 2 (2020)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v10n2.p146-157

Abstract

Physical systems in partial differential equations can be interpreted in a visual form using a wave simulation. In particular, the interpretation of the differential equations used is in the nonlinear hyperbolic model, but in its completion, there are some limitations to the stability requirements found. The aim of this study is to investigate the analytical and numerical analysis of a wave equation with a similar unit and fractal intervals using the Fourier coefficient. The method in this research is to use the analytical solution approach, the spectral method, and the finite difference method. The hyperbolic wave equation's analytical solution approach, illustrated in the Fourier analysis, uses a pulse triangle. The spectral method minimizes errors when there is the addition of the same sample grid points or the periodic domain's expansion with a trigonometric basis. Meanwhile, different ways offer a more efficient solution. Based on the research results, the information obtained is that the Fourier analysis illustrates the pulse triangle use to solve the solution. These results are also suitable for adding sample points to the same spectra. Fourier analysis requires a relatively long time to solve one pulse triangle graph to need another solution, namely the finite difference method. However, its use is still limited in terms of stability when faced with more complex problems.
PERANCANGAN INSTRUMENTASI PENGUKUR WAKTU DAN KECEPATAN MENGUNAKAN DT-SENSE INFRARED PROXIMITY DETECTOR UNTUK PEMBELAJARAN GERAK LURUS BERATURAN Nisa, Choirun; Widya P, Nurfitria; Santosa, Aji; Rahmawati, Endah
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 4, No 1 (2014)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v4n1.p36-41

Abstract

Fisika merupakan bagian dari sains yang memahami segala sesuatu tentang gejala-gejala alam yang terjadi. Banyak sekali fakta di  sekolah-sekolah bahwa pelajaran fisika merupakan pelajaran yang sulit dipahami dan membosankan. Konsep dan rumus yang telah disampaikan oleh guru biasanya hanya digunakan dalam penyelesaian soal-soal saja dan siswa cenderung bosan dan sulit untuk memahami  konsep tersebut. Sehingga diperlukan media untuk membantu proses belajar-mengajar misalnya media percobaan/eksperimen. Dalam percobaan membutuhkan perangkat antara lain instrumentasi dan bahan sesuai dengan percobaan yang akan dilakukan. Instrumentasi laboratorium sebagai penunjang percobaan yang akan membantu siswa memahami materi yang diajarkan, sering tidak dijumpai di sekolah-sekolah. Dalam penelitian ini dilaksanakan untuk merancang instrumentasi pengukur waktu dan  kecepatan sebagai media pembelajaran  materi gerak lurus beraturan. Penelitian ini diharapkan dapat menarik siswa dalam belajar materi fisika khususnya gerak lurus beraturan, sehingga dapat mewujudkan hasil belajar siswa yang maksimal. Dari hasil penelitian ini diperoleh DT Sense Infrared Proximity Detector dapat digunakan dalam perancangan instrumentasi pengukur waktu dan kecepatan. Dan hasil penelitian ini dapat digunakan sebagai media penunjang yang akan membantu siswa ataupun mahasiswa dalam memahami materi fisika khususnya materi gerak lurus beraturan.

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