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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 24 Documents
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Search results for , issue "Vol 9, No 2 (2019)" : 24 Documents clear
Automated Universal Image Quality Index Measurement vs. Automated Noise Measurement: Which Method is Better to Define CT Image Quality? Lestari, Fauzia Puspa; Anam, Choirul; Hardiyanti, Yati; Haryanto, Freddy
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 2 (2019)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v9n2.p132-139

Abstract

Automatitation method in defining the quality of CT image is needed to optimize CT Scan treatment planning. So, the optimization of treatment planning can also be done automatically. There are various methods proposed to define the quality of an image. The purpose of this study was to find the simple and precision method to define CT image. We compared the performance of Automated Noise Measurement (ANM) and Automated Universal Image Quality Index (UIQI). We also compared them with the Manual noise measurement method based on the level of convergence in homogeneous images. The first step of Automated Noise Measurement was to create binary density slice using threshold values. Then, a masked image was performed by masking the original image and binary image. The standard deviation of every pixel for a certain kernel size was calculated by using a sliding window operation. The fourth step was to make a noise histogram from the noise map and determine the final noise in the image as the histogram peak. Then this calculation was normalized by the peak of the Hounsfield Unit (HU) histogram. All these steps were done with various kernel sizes for different slices in-homogenous phantom. In the Automatic UIQI method, the steps in the ANM method are carried out until the masked image stage, then UIQI is calculated for the masked image. The results show that automatic UIQI was more convergence in defining image quality than manual noise measurement and automated noise measurement by the lowest standard deviation which was only 0.00032867.
The Use of Pictorial Analogy to Increase Students’ Achievement and Its Retention of Physics Lessons of Direct Current Djudin, Tomo; Grapragasem, Selvaraj
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 2 (2019)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v9n2.p140-151

Abstract

Analogy is considered a helpful way to help students visualize abstract concepts and assimilate new knowledge to an existing structure of cognitive. This study examines the effectiveness of the teaching with pictorial analogy models on students’ achievement and its retention of Direct Current lesson. A quasi-experimental method with one group pretest and (immediate and delayed) posttest design was employed in this study. The subjects consisted of 35 twelfth-grade students of public senior school in Pontianak City enrolled in the first semester of academic year 2017/2018; they were determined by using intact group random sampling technique. The student participants received instructions of the three pictorial analogy models. A parallel pretest-posttest of achievement test consisted of 10 items of factual knowledge, 10 items of conceptual knowledge, and 3 items of procedural knowledge. The operationalization of the pictorial analogies in this study referred to Glynn’s syntaxes. Data analysis found that: (1) the increasing of factual knowledge is 30.2 % in immediate posttest and 21.6 % in delayed posttest; (2)the students have promoted a significant conceptual change ( = 54.28, p < 0.05); and (3) there is a significant difference between the immediate posttest and pretest in terms of procedural knowledge (t = 4.02; p < 0.05) with the ES index is 4.78. It is concluded that the use of pictorial analogy models is effective (in high category) to increase students’ achievement of Direct Current lesson and the emergence of their retention is significant partially and simultaneously. In using pictorial analogies, teachers are encouraged to consider many similar features with the target concepts.
Quantum Propagator Derivation for the Ring of Four Harmonically Coupled Oscillators Gallo, James Mendoza; Butanas Jr., Bienvenido Masirin
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 2 (2019)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v9n2.p92-104

Abstract

The ring model of the coupled oscillator has enormously studied from the perspective of quantum mechanics. The research efforts on this system contribute to fully grasp the concepts of energy transport, dissipation, among others, in mesoscopic and condensed matter systems. In this research, the dynamics of the quantum propagator for the ring of oscillators was analyzed anew. White noise analysis was applied to derive the quantum mechanical propagator for a ring of four harmonically coupled oscillators. The process was done after performing four successive coordinate transformations obtaining four separated Lagrangian of a one-dimensional harmonic oscillator. Then, the individual propagator was evaluated via white noise path integration where the full propagator is expressed as the product of the individual propagators. In particular, the frequencies of the first two propagators correspond to degenerate normal mode frequencies, while the other two correspond to non-degenerate normal mode frequencies. The full propagator was expressed in its symmetric form to extract the energy spectrum and the wave function.
Increasing Students’ Responsibility and Scientific Creativity through Creative Responsibility Based Learning Suyidno, Suyidno; Susilowati, Eko; Arifuddin, Muhammad; Misbah, Misbah; Sunarti, Titin; Dwikoranto, Dwikoranto
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 2 (2019)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v9n2.p147-157

Abstract

Scientific creativity and responsibility are believed to be key factors for overcoming increasingly complex real-life problems faced by students; but both competencies are not trained in school. Therefore, this research aims to describe the effectiveness of creative responsibility based learning (CRBL) to increase student’s responsibility and scientific creativity on physics learning in senior high school. This research used one group pretest-posttest design involving 66 students of two senior high schools in Banjarmasin, South Kalimantan, Indonesia. The data collection was conducted by using responsibility observation emphasizing on participatory, cooperation, delivering an opinion, and leadership. Additionally, data were gained through scientific creativity test emphasizing on problem finding, product improvement, scientific imagination, scientific problem solving, and creative product design. The data analysis was done through qualitative descriptive, n-gain, and paired t-test. The results showed      (1) student’s responsibility for each meeting is in good criteria, and (2) there is a significant increase on students’ scientific creativity at α = 5 %, with n-gain constitutes moderate category. Thus, the CRBL is believed to be effective to increase student’s responsibility and scientific creativity in physics learning

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