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Utama Alan Deta
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jpfa@unesa.ac.id
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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 10 Documents
 1 
Search results for , issue "Vol. 11 No. 1 (2021)" : 10 Documents clear
Study of Sun Protection Factor (SPF) Batik Textile Fabric on Solar Radiation in Pekalongan Yeni Rima Liana; Fianti Fianti; Upik Nurbaiti
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 11 No. 1 (2021)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v11n1.p39-49

Abstract

The amount of sunscreen ability is determined through the value of a person's Sun Protection Factor (SPF) when under the sun without experiencing sunburn. This study aims to measure the intensity of sunlight received by batik textile fabrics and SPF measurements to determine the ability of these fabrics to protect sunlight radiation. The research was conducted at the Sorogenen area in Pekalongan, Central Java. The intensity data collection is done during the sunny weather with 300C - 320C temperature. The SPF value is calculated by comparing the intensity of sunlight without and with a protective batik cloth. Between 10:00 a.m. and 2:00 p.m. (GMT +7), the average intensity is 85.160 lux to 113.400 lux. The results obtained by fabric with a thickness of 2 mm have an SPF greater than fabric with a thickness of 1 mm. Cotton fabric has the ability to protect against sunlight better than satin and Mori fabric. A blue cotton cloth owns the most significant SPF value with a thickness of 2 mm of 36.06. In comparison, the smallest SPF value is owned by yellow Mori fabric with a thickness of 1 mm of 5.24.
Description of Student Responses to the Implementation of the Inquiry Learning Model in Physics Jufrida Jufrida; Dwi Agus Kurniawan; Tanti Tanti; Weni Sukarni; Erika Erika; Roro Hoyi; Muhammad Ikhlas
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 11 No. 1 (2021)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v11n1.p16-28

Abstract

The model of learning is one of the approaches of strategy that teachers must carry out in a systematic and procedural to regulate the activities of learning to achieve the goal of learning. The process of learning by using a model of learning inquiry can increase the activity of the students, the courage of students in revealing ideas and ideas, and improve students' science process skills in the physics learning process. The purpose of the research is to know how students' response to models of learning of inquiry was used at the time of learning physics and see whether the application of the model the students are more skilled in learning. Research is conducted in SMA Negeri 8 Muaro Jambi on student grade X IPA 1, which aims to determine students' response when given an inquiry learning model during the process of learning physics. The instrument that is used is a questionnaire of students with a sample of 21 students. This study used a mixed-method with a sequential explanatory design. The descriptive statistics were employed in the data analysis technique to obtain the average, mode, median, minimum, and maximum values. Based on the findings of this study, it is possible to conclude that using inquiry learning models in physics learning can boost student activity, independence, and science skills. This is demonstrated by the students' responses in quite good categories. Students feel accountable for formulating, analyzing, and solving problems when using the inquiry learning methodology. So that students can learn physics in a more meaningful way, and the material is easier to retain. The student response rate to the learning model is rated as satisfactory.
An Exploration of Scientific Literacy on Physics Subjects within Phenomenon-based Experiential Learning Prima Warta Santhalia; Lia Yuliati
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 11 No. 1 (2021)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v11n1.p72-82

Abstract

Abstract Scientific literacy is the ability to involve yourself in problems related to science. This research explores students' scientific literacy skills in experiential learning based on phenomena on the concept of expansion. This research was conducted with a mix-method approach with an embedded experimental model design. The data were collected through scientific literacy tests (r = 0.53), and open-ended questions interviews with the students, then analyzed using the Mann-Whitney U-Test quantitatively, and using the Bybee (1997) assessment rubric qualitatively. Based on the results, it was found that the majority of students experienced an increase in their scientific literacy from the SI (Scientific Illiteracy) category (96.88%) into CSL (Conceptual Scientific Literacy) (46.88%). We concluded that phenomenon-based experiential learning was effective in improving students' scientific literacy. So, we need more effort to improve and increase students' scientific literacy skills by integrating scientific literacy competencies while implementing science learning in schools.
Correlation Of Science Process Skills On Critical Thinking Skills In Junior High School In Jambi City Maison Maison; Darmaji Darmaji; Dwi Agus Kurniawan; Astalini Astalini; Kuswanto Kuswanto; Aziza Putri Ningsi
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 11 No. 1 (2021)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v11n1.p29-38

Abstract

Teachers need to know how science process skills and students' critical thinking skills are. This study aims to see the relationship between science process skills and critical thinking skills so that teachers can determine the appropriate learning methods to improve science process skills and critical thinking skills. The researcher employed a sample of 58 students from class IX junior high school Adhyaksa 1 Jambi City. The sampling technique in this study using cluster sampling. This study's research design is an associative quantitative research method with a correlational research design. Quantitative analysis uses the SPSS program to find descriptive, normality tests, linearity tests, and correlation tests. The results showed that the significance value obtained was less than 0.05. It was seen that there was a relationship between students' process skills and students' critical thinking abilities
Designing of Environmental Physics Course Instruments about Ocean Wave Energy to Enhance Students' Creative Thinking Skills Satriawan, Muhammad; Liliasari, Liliasari; Setiawan, Wawan; Abdullah, Ade Gafar
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 11 No. 1 (2021)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v11n1.p1-15

Abstract

Various factors become obstacles to developing renewable energy technology, including people's low knowledge of renewable energy and low 21st-century skills. Therefore, designing learning that can increase understanding of renewable energy and improve 21st-century skills simultaneously is essential. This study aimed to create programs of environmental physics lectures about OWC as a renewable energy source. This research was developmental research with analysis, design, and development stages. The products in this study were test instruments to measure creative thinking skills, OWC converters prototype, and a project-based lecture program oriented towards providing creative thinking skills through a combination of lectures in the classroom, laboratory, and marine environment. Five experts validated all products. In addition, besides experts' validation, the creative thinking test instrument was tested on 17 students who had taken environmental physics lectures. In contrast, a marine engineering laboratory tested the prototype at a university in Bandung. Experts' validity data were analyzed using the content validity ratio, while the test instrument data were calculated for reliability, validity, discrimination, and difficulty levels. Based on the results of expert validation, all products are feasible to be implemented. Based on the test results, the prototype developed functions well, while for the test instrument of 10 questions developed, only eight questions were eligible to be used. All of the products produced can be used as a reference and reference for lecturers or teachers who develop learning about renewable energy and equip students with creative thinking skills.
Comparison of Bright Band Radar from GPM and MRR Observation in West Sumatera Ramadhan, Ravidho; Marzuki, Marzuki; Vonnisa, Mutya; Harmadi, Harmadi; Hashiguchi, Hiroyuki; Shimomai, Toyoshi
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 11 No. 1 (2021)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v11n1.p50-62

Abstract

The Bright band (BB) observation can be used as an indication of the melting layer height. Measurement of BB from Normal Scan (NS) on Global Precipitation Measurement (GPM) had been compared with Micro Rain Radar (MRR), which is installed in Kototabang, West Sumatera (0.23° S; 100.32°E; 865 m above sea level). The GPM data were collected from December 2014 to June 2018 and compared with MRR observation from January 2012 to August 2016. The BB values from these instruments were compared with those recommended by the International Telecommunication Union Recommendation (ITU-R) P.839. The BB from GPM and MRR showed slightly diurnal and seasonal variations. BB observations from GPM and MRR show good agreement with slight diurnal and seasonal variations differences. BB observations are more similar when the intensity of solar radiation is lower, i.e., at night (18.00-24.00 LT) until early morning (00.00-06.00 LT). Furthermore, MRR showed a slight bimodal pattern in the seasonal variation, while GPM did not. Thus, the seasonal variation in the observation of both instruments is different. The most significant difference from the seasonal variation was observed in the summer season (June-August (JJA)). The mean BB of the two instruments is lower than the Freezing Height Level (FHL) value calculated from the ITU-R model. However, many BB from the two instruments (>36 %) have a BB altitude higher than FHL. Thus, the constant assumption of FHL in West Sumatera for the rain attenuation estimation of microwaves may not be appropriate.
Simulation on the Effect of Coolant Inlet Temperature and Mass-Flowrate Variations to the Temperature Distribution in Single Pellet Thermal Reactor Core Elin Yusibani; Fitria Helmiza; Fashbir Fashbir; Sidik Permana
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 11 No. 1 (2021)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v11n1.p63-71

Abstract

An important factor in the development of nuclear energy is reactor safety. The performance of heat transfer from nuclear fuel to coolant is the main key to the reactor safety. This paper presents simulation on temperature distribution in two-dimensional laminar flow for single pellet thermal reactor with variation on temperature inlet and mass-flowrate. The OpenFoam platform (SimFlow 3.1) has been used for the computational and numerical analysis. The simulation is carried out on a single pellet with an aspect ratio of 1.2. The variations in the mass velocity of the coolant flow are 10, 100, and 14300 kg×s-1 with a constant coolant temperature of 552 K, and the variations of the input coolant temperature are 300, 552, and 1000 K with a constant mass-flowrate of 10 kg×s-1. The results obtained from the simulation show that for variations in the input coolant temperature of 300, 552, and 1000 K, the fuel temperature can be reduced respectively by 34, 26, and 14 K. At the fastest variation in the coolant mass-flowrate of 14300 kg×s-1, the coolant temperature around the pellet rises by 396 K. The decrease in fuel temperature is significant if the mass-flowrate of the input coolant flow is relatively low.
Finite Element Analysis of Patient Specific Bone Plate with Ti6Al4V Material Selection Talitha Asmaria; Dita Ayu Mayasari; Safarudin Ramdhani; Muhammad Satrio Utomo; Daniel Panghihutan Malau; Dhyah Annur; Muhammad Ikhlasul Amal; Ika Kartika
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 11 No. 1 (2021)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v11n1.p83-93

Abstract

A patient-specific implant is a designed implant that considers the needs of a specialized patients condition. In several surgical cases, the implant design needs to be adjusted based on the patient bones surface to suit the bone morphometry. This study aims to conduct the finite element analysis to investigate the stress distribution alongside the plate to consider clinical implementation. A bone plate has been designed following an adult pelvic bone shape for the pelvic fractures clinical case management. An FEA was accomplished to analyse the implant designs performance and estimate the installations clinical failures before the manufacturing process. The FEA calculation achieved the highest number of von misses stresses (VM) on the pelvic bone plate by 3.616 MPa. The obtained VM number on the simulation is smaller than the yield strength of Ti6Al4V. It concludes that the customized iliac plates design using Ti6Al4V can have excellent mechanical strength and can withstand the loading. Additional similar simulation using another software strengthen the results.
Introduction, Author Guidlines, and Table of Contents JPFA Volume 11 Nomor 1 Juni 2021 Utama Alan Deta
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 11 No. 1 (2021)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v11n1.pii-vi

Abstract

Acknowledgment JPFA Volume 11 Nomor 1 Juni 2021 Utama Alan Deta
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 11 No. 1 (2021)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v11n1.pvii-viii

Abstract

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