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Utama Alan Deta
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utamadeta@unesa.ac.id
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jpfa@unesa.ac.id
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Fakultas Matematika dan Ilmu Pengetaahuan Alam Jl. Ketintang, Gd C3 Lt 1, Surabaya 60231
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INDONESIA
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
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 ? = 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
OPTICAL PROPERTIES COMPARISON OF CARBON NANODOTS SYNTHESIZED FROM KANGKUNG (IPOMOEA AQUATICA) WITH DEEP FRYING AND ROASTING TECHNIQUES Dwandaru, Wipsar Sunu Brams; Fauzi, Fika; Sari, Dyah Silviana; Sari, Emi Kurnia; Santoso, Iman; Suhendar, Haris
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.p123-131

Abstract

Carbon nanodots (Cdots) have many unique properties such as luminescence that can be utilized in various fields. The purposes of this study are to synthesize Cdots from kangkung (Ipomoea aquatica) through frying and roasting techniques and compare the optical properties of the Cdots using UV-Vis, PL, and FTIR. Three stages of synthesizing process of Cdots, i.e.: preparing the kangkung powder (root, stem, leaf) and synthesizing the Cdots through frying and roasting techniques. Each part (root, stem, and leaf) was heated in an oven at 250 oC for 2 hours and mashed into powder. The frying method was done by frying 15 g of the powder in 120 ml oil for 5 minutes at 88 oC, filtered, and dissolved in n-hexane. In addition, the roasting method was done by frying the powder without oil as much as 15 g for 5 minutes, dissolved in 120 ml of distilled water, and then filtered. The UV-Vis characterization showed one absorbance peak for Cdots via frying and roasting techniques at 293 nm to 296 nm and 262 nm to 282 nm, respectively. The Cdots through frying and roasting techniques produce red and green luminescence, respectively. The FTIR characterization showed the presence of C=C and C=O functional groups, which are the core and surface state of the Cdots by frying technique, while the samples via roasting technique showed only the core. It can be concluded that the Cdots samples obtained from frying and roasting methods have different optical properties. The frying method produces Cdots with longer wavelength at the absorbance peak in the UV-Vis test compared to the roasting method. Moreover, the frying and roasting methods produce different color luminescence.
THE RATE OF LAND COVER CHANGE USING LANDSAT DATA IN COAL MINING AREA OF SAWAH LUNTO CITY, INDONESIA Cahyono, Bowo Eko; Frahma, Yazella Feni; Nugroho, Agung Tjahjo
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.p189-203

Abstract

Sawahlunto city is well-known for coal mining region. As in 2010, there have been at least 12 mining companies exploring coal resources in the region. As time passes, land cover conditions have gradually decreased due to mining activities. This region on which was originally covered by various vegetation and ecosystem have systematically transformed into open areas for coal mining. The use of remote sensing technology for land cover monitoring has been commonly well-developed in accordance with the need for improvement of detailed information about the changes of land use coverage. This study examines the land cover changes using supervised classification method based on Landsat data. The method focuses on four dominant classes of land cover in the region, namely forest, mining, settlement, and water resources. The classification processes were performed based on true-color composite satellite images. The results show that the overall accuracies of classification are 91.68 %, 92.49 %, 93.69 %, and 93.74 % in 2000, 2006, 2011, and 2016 respectively. It was also found that forest is the largest area in the coal mining area which, in some sense, tends to continuously decrease in terms of land cover in the last 15 years. The rate of forest area degradation achieved its maximum between 2006 and 2011.
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.
Introduction, Author Guidlines, and Table of Contents JPFA Vol 9 No 2 December 2019 JPFA, Editor
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.pii-vii

Abstract

Acknowledgment JPFA Vol 9 No 2 December 2019 JPFA, Editor
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.pvii-viii

Abstract

Back Cover JPFA Vol 9 No 2 December 2019 JPFA, Editor
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.pix

Abstract

Simple Application of Time Correlated Single Photon Counter of Picosecond Pulsed Laser to Measure Refractive Index of Saline Solution Isnaeni, Isnaeni; Mulyawan, Reynaldi Gilang; Hakimi, Ahmad Reza
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.p105-113

Abstract

Time correlated single photon counter was design for measuring fluorescence lifetime of emitting materials. It was designed for photonics basic research and science that is usually done in a laboratory. Furthermore, time correlated single photon counter can be used to measure simple and more practical optical properties of materials, such as refractive index. However, since the system was not designed for this practical application, a simple setup modification and calculation is required. In this work, time correlated single photon counter is utilized to measure the refractive index of sodium chloride solutions. The measurement was done using simple time of flight calculation of each pulse of picosecond pulsed laser. Our measurement was done on different concentrations of sodium chloride that have different refractive indices. It was found that the measurement technique and calculation was able to produce consistent quantitative calculation of refractive indices.  
An Exploration of Students’ Mental Models on Heat and Temperature: A Preliminary Study Priyadi, Rian; Diantoro, Markus; Parno, Parno; Helmi, Helmi
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.p114-122

Abstract

The mental models are internal representation possessed by students when learning a concept. This study is intended to explore students’ mental models on Heat and Temperature concept. This research was conducted on 11th grade students of Science program (N = 60) at one senior public school in Malang. Data were collected through open-ended questions and analyzed using the SSI method, which consisted of three levels of mental models. Based on the results, most of the students are still at the synthetic level. In addition, some differences of the students in visualizing the state of solid atoms during expansion, direction of heat conduction, and direction of heat convection. The future study is expected to explore the mental models of students in other topics of Physics education and make use of appropriate learning models to increase students’ mental models.
The Rate of Land Cover Change using Landsat Data in Coal Mining Area of Sawah Lunto City, Indonesia Cahyono, Bowo Eko; Frahma, Yazella Feni; Nugroho, Agung Tjahjo
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.p189-203

Abstract

Sawahlunto city is well-known for coal mining region. As in 2010, there have been at least 12 mining companies exploring coal resources in the region. As time passes, land cover conditions have gradually decreased due to mining activities. This region on which was originally covered by various vegetation and ecosystem have systematically transformed into open areas for coal mining. The use of remote sensing technology for land cover monitoring has been commonly well-developed in accordance with the need for improvement of detailed information about the changes of land use coverage. This study examines the land cover changes using supervised classification method based on Landsat data. The method focuses on four dominant classes of land cover in the region, namely forest, mining, settlement, and water resources. The classification processes were performed based on true-color composite satellite images. The results show that the overall accuracies of classification are 91.68 %, 92.49 %, 93.69 %, and 93.74 % in 2000, 2006, 2011, and 2016 respectively. It was also found that forest is the largest area in the coal mining area which, in some sense, tends to continuously decrease in terms of land cover in the last 15 years. The rate of forest area degradation achieved its maximum between 2006 and 2011.

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