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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 16 Documents
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Search results for , issue "Vol 9, No 1 (2019)" : 16 Documents clear
A SIMPLE MATRIX APPROACH TO DETERMINATION OF THE HELIUM ATOM ENERGIES Pingak, Redi Kristian; Kolmate, Rosara; Bernandus, Bernandus
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 1 (2019)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v9n1.p10-21

Abstract

Calculation of He atomic energy levels using the first order perturbation theory taught in the Basic Quantum Mechanics course has led to relatively large errors. To improve its accuracy, several methods have been developed but most of them are too complicated to be understood by undergraduate students. The purposes of this study are to apply a simple matrix method in calculating some of the lowest energy levels of He atom (1s2, triplet 1s2s, and singlet 1s2s states) and to reduce errors obtained from calculations using the standard perturbation theory. The convergence of solutions as a function of the number of bases is also examined. The calculation is done analytically for 3 bases and computationally with the number of bases using MATHEMATICA. First, the 2-electron wave function of the Helium atom is written as the multiplication of two He+ ion wave functions, which are then expanded into finite dimension bases. These bases are used to calculate the elements of the Hamiltonian matrix, which are then substituted back to the energy eigenvalue equation to determine the energy values of the system. Based on the calculation results, the error obtained for the He ground state energy using 3 bases is 2.51 %, smaller than the errors of the standard perturbation theory (5.28 %). Despite the fact that the error is still relatively large from the analytical calculations for singlet-triplet 1s2s energy splitting of He atom, this error is successfully reduced significantly as more bases were used in the numerical calculations. In particular, for n = 25, the current calculation error for all states is much smaller than the errors obtained from calculations using standard perturbation theory. In conclusion, the analytical calculations for the energy eigenvalue equation for the 3 lowest states of the Helium atom using 3 bases have been carried out. It was also found in this study that increasing the number of bases in our numerical calculations has significantly reduced the errors obtained from the analytical calculations.
INTRODUCTION, AUTHOR GUIDELINES, AND TABLE OF CONTENTS JPFA VOL 9 NO 1 JUNE 2019 JPFA, Editor
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 1 (2019)
Publisher : Universitas Negeri Surabaya

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Abstract

DEVELOPMENT OF HOTS ORIENTED COGNITIVE PROBLEMS IN THERMODYNAMICS FOR SENIOR HIGH SCHOOLS Agustihana, Seftyan; Suparno, Suparno
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 1 (2019)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v9n1.p44-54

Abstract

One of cognitive abilities of students that should be trained and developed in the 21st century learning is high-level thinking skills. As higher order thinking skills are emerging trend in education, assessment instruments based on high order thinking skills (HOTS) principles are required. This study aims to develop a high-level thinking ability instrument for Physics subject of senior high schools which is intended to measure HOTS of senior high school students for Thermodynamic Materials in City of Nganjuk in East Java. The study was conducted in three stages, including initial development, trials, and measurement. The initial development stage included compilation, review, and validation, including content validation by experts. There are two sets questions A and B, consisting 20 questions respectively, with anchor items as much as 5 items. The measurement results show that HOTS-oriented test kits of Thermodynamics have obtained empirical evidence are suitable with partial credit model. The difficulty level of the test battery is in the range of -2.0 to +2.0, with the most difficult aspects in the sequence are analyzing, evaluating, and creating. The reliability of HOTS-oriented tests has met the high categorical requirements, and based on the total information function of the tests, it is appropriately used to measure the HOTS of learners with capability -2.3 to +1.6. Based on students? responses, the analysis ability is the highest skills followed by the ability to evaluate and create. HOTS-oriented tests developed can be used as the reference for the teachers to accommodate student?s higher order thinking skills.
FRONT COVER JPFA VOL 9 NO 1 JUNE 2019 JPFA, Editor
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 1 (2019)
Publisher : Universitas Negeri Surabaya

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Abstract

SENSITIVITY APPROACH OF OPTICAL SENSORS OF CHOLESTEROL DETECTION THROUGH GAUSSIAN BEAM AND QUASI-GAUSSIAN BEAM Budiyanto, Mohammad; Yasin, Mohamad; Harun, Sulaiman Wadi
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 1 (2019)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v9n1.p22-31

Abstract

Sensitivity is the comparison result between changes in output signal intensity and changes in input signal shift sensor. The purpose of this study was to analyze the sensitivity of fiber optic sensors using mathematical analysis through the Gaussian beam approach and quasi-Gaussian beam compared with the sensitivity of the optical sensor experimental results so that it can find the correct approach of sensitivity values between theory and experiment. The research method used mathematical analysis and experimental methods and mathematical descriptions for the description of the bundle optical fiber used in the experiment until the sensitivity equation is obtained. The results of the mathematical analysis of the Gaussian beam sensitivity values obtained of S = 0.004 mV ppm-1 and the sensitivity of quasi-Gaussian beam of S = 0.08 mV ppm-1. The results of the sensitivity of experimentally obtained S = 0.11 mV ppm-1. Based on the results of mathematical, experimental analysis, and sensor performance, sensitivity through the flat mirror reflection field, it can be concluded that the sensitivity of the optical fiber sensor tends to approach through the quasi-Gaussian beam approach to determine cholesterol concentration.
ACKNOWLEDGMENT JPFA VOL 9 NO 1 JUNE 2019 JPFA, Editor
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 1 (2019)
Publisher : Universitas Negeri Surabaya

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Abstract

PROBLEM-BASED LEARNING MODEL FOR THREE-PHASE INDUCTION MOTOR Prastyaningrum, Ihtiari; Pratama, Hendrik
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 1 (2019)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v9n1.p55-64

Abstract

This study aims to examine the Problem-Based Learning(PBL) model to improve the understanding of electromagnetic induction material in three-phase induction motor. Most of the students attending the Electrical Machine course have low understanding upon the working principles of the three-phase induction motor, in particular the basic theory of the relationship between the electromagnetic field and the three-phase induction motor. This study involved seventeen students of Electrical Engineering Education Study Program of Universitas PGRI Madiun in East Java. Data were collected through observation and tests, with the statistical test of research using paired sample t-test. This quasi-experimentresearch employed one-group pre-test and post-test design. The results showed that the application of PBL model with video simulation and practicesimprove students?understanding of the materials. The learning process by utilizing simulated animation video and the practices of unloading three-phase induction motors directly, the students?understanding of the working principles of three-phase induction motors increases with the average of N-Gain score. These results indicate the use of video and hands-on practice become effective way to deliver complex and abstract material to students. It is also believed that the learning on electromagnetic induction can be carried out more efficiently. Additionally, such learning model is believed to ease physics education.
ANALYSIS OF NEUTRONIC SAFETY PARAMETERS OF THE MULTI-PURPOSE REACTOR–GERRIT AUGUSTINUS SIWABESSY (RSG-GAS) RESEARCH REACTOR AT SERPONG Surbakti, Tukiran; Purwadi, Purwadi
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 1 (2019)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v9n1.p78-91

Abstract

The main safety parameters of Multipurpose Reactor?Gerrit Augustinus Siwabessy (RSG-GAS) have never been evaluated periodically and neutronically require to be evaluated in terms of stuck rod reactivity, shut-down margin and temperature reactivity coefficient are treated by experiment. Meanwhile, power peaking factors and maximum fuel burn up are treated by calculations. The diffusion method did the calculation using the computer code. Safety parameters are very important aspects for the operation and design improvement. The results of the experiment and calculation about the safety parameters of RGS-GAS core are utilized for safety evaluation as part of a research reactor operation Periodic Safety Review (PSR). It presents reactor calculations as a method for their determination assuming use of computer codes such as WIMSD-5B using ENDF.BVII.0 and BATAN-FUEL. According to the experimental data and calculation, neutronic safety parameters have met the safety analysis report such as reactivity coefficient is negative and met the shutdown margin at stuck rod condition nothing has violated the safety margin. The results can be used as the periodic safety review for renewal operation license from Nuclear Energy Regulatory Agency of Indonesia (BAPETEN) as the regulator body. These results also can be used as a reference for new research reactor MTR type advanced design in the future.
BACK COVER JPFA VOL 9 NO 1 JUNE 2019 JPFA, Editor
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 1 (2019)
Publisher : Universitas Negeri Surabaya

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Abstract

UNDERSTANDING BY DESIGN (UBD) FOR THE PHYSICS LEARNING ABOUT PARABOLIC MOTION Kuntari, Fransiska Retno; Rondonuwu, Ferdy Semuel; Sudjito, Debora Natalia
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 1 (2019)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v9n1.p32-43

Abstract

In general, in preparing the lesson, teachers determine some components namely learning objectives, procedures, and evaluation and assessment instruments. Several problems in Physics learning on Parabolic Motion indicate possible flaws from the three components in designing the lesson. Understanding by Design (UbD) is applied as one of the alternative strategies to improve the lesson quality by considering the learning objectives, procedures, and evaluation by reversing the design, namely proposing the objectives first, evaluations as the second, and lesson steps as the last step. This is a qualitative research intended to construct an alternative design of Physics learning on Parabolic Motion using UbD. The initial Physics learning design was reviewed and analyzed by experts and revised until the final design. Understanding by Design (UbD) could be used as an alternative design construction as it helps teachers to relate the three main components, namely learning objectives, evaluations, and steps so it eased the students understand the materials comprehensively and obtain maximum score. Despite the development of current materials needs more improvement, Understanding by Design (UbD) can applied for many materials.

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