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D. Rusdiana
Physics Department, Universitas Pendidikan Indonesia
Education Physics

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IMPACT OF REPRESENTATIONAL APPROACH ON THE IMPROVEMENT OF STUDENTS’ UNDERSTANDING OF ACCELERATION -, Sutopo; -, Liliasari; Waldrip, B.; Rusdiana, D.
Jurnal Pendidikan Fisika Indonesia Vol 8, No 2 (2012)
Publisher : Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang

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Abstract

Penelitian ini mengkaji dampak pendekatan representasi pada peningkatan pemahaman siswa tentang konsep percepatan. Subjek penelitian terdiri atas 24 mahasiswa pendidikan fisika Universitas Negeri Malang yang mengambil matakuliah Kapita Selekta Fisika Sekolah pada semester gasal tahun akademik 2011/2012. Dengan menggunakan desain penelitian mixed-method, disimpulkan beberapa dampak sebagai berikut: (1) Skor penguasaan konsep mahasiswa meningkat secara signifikan dari rata-rata 50,8% menjadi 85,0%, dengan efect size yang sangat tinggi (1,67) dan gain ternormalisasi yang juga tinggi (0,71). (2) Mahasiswa mampu menggunakan definisi operasional percepatan   untuk menganalisis diagram gerak yang berupa multi-flash; (3) Mahasiswa bisa memperbaiki sejumlah miskonsepsinya tentang percepatan; (4) Namun, sebagian kecil mahasiswa masih terpaku dengan miskonsepsinya bahwa percepatan benda yang ditembakkan ke atas berkurang seiring dengan ketinggiannya, dan tegangan tali pada ayunan selalu sama dengan berat pendulum.This research examined the impact of representational approach on the improvement of students’ understanding of acceleration. Subject consisted of 24 prospective physics teacher students of State University of Malang, enrolling Selected Topic of School Physics course in Semester I of 2011/2012 academic year. Using mixed-methods design, this study concluded that (1) students’ mean score of conceptual test increased significantly from 50.8% to 85.0% with very large d-effect size (1.67) and high normalized-gain (0.71), (2) students became able to use operational definition of acceleration   to analyze multi-flash motion diagram, and (3) students remediated their misconceptions of acceleration. However, few students stuck in their misconception that acceleration of a shot-up object is decreasing with its elevation, and the tension in the rope of a swinging pendulum is equal to the weight of its bob.
PEMBUATAN SENSOR GAS HIDROGEN BERBASIS FILM TIPIS GaN DENGAN TEKNIK SOL GEL SPIN COATING UNTUK KOMPONEN PADA SISTEM PENDETEKSI KEBOCORAN GAS Rusdiana, D.
Jurnal Pendidikan Fisika Indonesia Vol 9, No 1 (2013)
Publisher : Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang

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Abstract

Penelitian ini bertujuan untuk membuat sensor gas dengan sensitivitas baik, dipergunakan sebagai komponen dalam sistem pendeteksi kebocoran gas hidrogen. Bahan dasar sensor berbahan  film tipis semikonduktor Gallium Nitrida (GaN) yang ditumbuhkan di atas substrat sapphire (Al2O3) menggunakan teknik sol gel spin coating. Parameter penumbuhan film tipis temperatur penumbuhan 8500 C, laju spinner 1000 rpm, molaritas Ga2O3 1,33 M dan laju aliran gas nitrogen 100 sccm.  Hasil pengujian sifat listrik dalam lingkungan gas hidrogen ternyata resistansi listrik sensor gas menurun secara tajam dari 1,5 x 10-2 Ohm.cm menjadi 7 x 10-3 Ohm.cm bila laju aliran gas diperbesar dari 20 sccm hingga 150 sccm. Pengujian sensitivitas sensor gas dilakukan dalam lingkungan gas hidrogen dan gas nitrogen. Hasil pengujian sensor gas dalam lingkungan gas hidrogen memiliki sensitivitas sekitar 60 % sedangkan dalam lingkungan gas nitrogen sekitar 50 % laju aliran gas 100 sccm. Tingkat sensitivitas sensor gas dalam lingkungan gas hidrogen lebih tinggi dibandingkan dalam lingkungan gas nitrogen. This research aims to make the gas sensors using GaN films that grown on sapphire substrate (Al2O3) by sol gel spin coating techniques with growth temparature 8500 C, spinner rate 1000 rpm, molarity of Ga2O3 1.33 M and nitrogen flow rate 100 sccm. Upon exposure to volatile organic compound (VOC), especially to hydrogen gas, the electrical resistance of semiconducting GaN thin film was found to rapidly decrease from 1.5 x 10-2 Ohm.cm to 7 x 10-3 Ohm.cm after increasing the hydrogen gas flow rate from 20 sccm to 150 sccm. The gas sensors exhibited good sensitivity of about 60 % in 100 sccm flowing hydrogen gas and about 50 % in 100 sccm flowing nitrogen gas.
Computer-Based Experiment of Free Fall Movement to Improve the Graphical Literacy Subali, B.; Rusdiana, D.; Firman, H.; Kaniawati, I.; Ellianawati, E.
Jurnal Pendidikan IPA Indonesia Vol 6, No 1 (2017): April 2017
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v6i1.8750

Abstract

The purpose of this study is to develop computer-based experiment of free fall movement to improve the graphical literacy of the Physics Education students. This study employed quasi-experimental design, particularly the pre-test and post-test control group design. The sample was 58 students of the first semester of Physics Education study program. They were divided into two groups, namely 38 students constituted an experimental group and 20 students constituted the control group. Both groups joined learning activities at laboratory and classrooms with the same topic which is the free fall movement. Computer-based learning models were used to design learning activities for the experimental group, while the control group used a traditional learning model with manual experiment with stopwatch and never use experiment tool of free fall movement. It was indicated in this study that the use of such learning model improved the graphical literacy capability better than the traditional learning, which covered ability to identify experimental variables, using the experimental tools, making a graph, formulating mathematical equation, making predictions on the basis of the graph.
Computer-Based Experiment of Free Fall Movement to Improve the Graphical Literacy Subali, B.; Rusdiana, D.; Firman, H.; Kaniawati, I.; Ellianawati, E.
Jurnal Pendidikan IPA Indonesia Vol 6, No 1 (2017): April 2017
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v6i1.8750

Abstract

The purpose of this study is to develop computer-based experiment of free fall movement to improve the graphical literacy of the Physics Education students. This study employed quasi-experimental design, particularly the pre-test and post-test control group design. The sample was 58 students of the first semester of Physics Education study program. They were divided into two groups, namely 38 students constituted an experimental group and 20 students constituted the control group. Both groups joined learning activities at laboratory and classrooms with the same topic which is the free fall movement. Computer-based learning models were used to design learning activities for the experimental group, while the control group used a traditional learning model with manual experiment with stopwatch and never use experiment tool of free fall movement. It was indicated in this study that the use of such learning model improved the graphical literacy capability better than the traditional learning, which covered ability to identify experimental variables, using the experimental tools, making a graph, formulating mathematical equation, making predictions on the basis of the graph.
Design of Experimental Problem Solving-Based Learning Program to Improve Mental Model and to Enhance Mental-Modeling Ability Supriyatman, S.; Suhandi, A.; Rusdiana, D.; Samsudin, A.; Wibowo, F. C.; Mansyur, J.
Jurnal Pendidikan Fisika Indonesia Vol 14, No 2 (2018)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v14i2.6279

Abstract

Research on developing experimental problem solving-based learning program to overcome the low mental model (MM) and mental-modeling abilities (MMA) physics teacher candidate in one of the college teachers in Palu have been conducted. Mental model construction is the “core” of meaningful learning and along with MMA (modeling) become a keyword to understand the key concepts in the science learning. The development of this learning program was using R & D method. Development process from requirement analysis phase until implementation process has already been described using 4D model: define, design, develop and disseminate. The subject matter of this research was the Basic Physics II course on the topic of electricity and magnetism. Based on the data analysis and findings at each stage of development, it is concluded that the learning program stages which have improved MM and also enhanced the MMA of physics teacher candidates consist of learning orientation phase; orientation to the problem; pre-experimental brainstorming; experiment; evaluation; as well as the phase of reinforcement and follow-up.Penelitian tentang pengembangan program berbasis eksperimen problem solving untuk mengatasi rendahnya mental model (MM) dan mental-modeling abilities (MMA) calon guru fisika di salah satu guru perguruan tinggi di Palu telah dilakukan. Konstruksi model mental adalah inti dari pembelajaran yang bermakna dan bersama dengan MMA (pemodelan) menjadi kata kunci untuk memahami konsep-konsep kunci dalam sains. Pengembangan program pembelajaran ini menggunakan metode R & D. Proses pengembangan dari tahap analisis kebutuhan hingga proses implementasi dijelaskan menggunakan model 4D: define, design, develop, disseminate. Materi yang dikaji dalam penelitian ini adalah mata kuliah fisika dasar 2 tentang topik listrik dan magnet. Berdasarkan analisis data dan temuan pada setiap tahap perkembangan, disimpulkan bahwa tahapan program pembelajaran yang telah memperbaiki MM dan juga meningkatkan MMA calon guru fisika terdiri dari fase orientasi pembelajaran; orientasi pada masalah; pra-brainstorming eksperimental; percobaan; evaluasi; serta fase penguatan dan tindak lanjut.
The Development and Validation of Conceptual Knowledge Test to Evaluate Conceptual Knowledge of Physics Prospective Teachers on Electricity and Magnetism Topic Rahmawati, R.; Rustaman, N. Y.; Hamidah, I.; Rusdiana, D.
Jurnal Pendidikan IPA Indonesia Vol 7, No 4 (2018): December 2018
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v7i4.13490

Abstract

The conceptual knowledge test is an efficient way to measure the conceptual knowledge of physics prospective teachers on electrical and magnetism topic. The employed instrument was physical questions in the form of multiple-choice options. The process of developing and validating the conceptual knowledge test consisted of 5 steps: (1) content analysis; (2) construction of multiple-choice items; (3) readability test and expert validation; (4) limited tryout; and (5) large-scale application. The instrument validation test through trials was conducted in order to obtain the data related to difficulty index, discriminating power, distractor functionality, and reliability coefficient value that was then analyzed using ITEMAN version 3.0 program. The participants were 215 physics prospective teachers of a University in Makassar city.  The instrument validation resulted in 40 items that consisted of 26 items for electricity and 14 items for magnetism. The instrument is called Conceptual Knowledge Test-Electricity and Magnetism (CKT-EM). The value of the reliability coefficient (α) (Alpha Cronbach) of 0.87 indicated that the instrument of conception test on electrical and magnetism topics was valid and sufficient to measure students’ conception on electrical and magnetism topic.
Students’ Perception of Learning Management System Supported Smartphone: Satisfaction Analysis in Online Physics Learning Rizal, R.; Rusdiana, D.; Setiawan, W.; Siahaan, P.
Jurnal Pendidikan IPA Indonesia Vol 9, No 4 (2020): December 2020
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v9i4.25363

Abstract

Learning Management System Supported Smartphone (LMS3) is a new and innovative application in online physics learning synchronously. The research aims to investigate the level of students’ satisfaction in using LMS3 and determine predictor variables that affect the level of students’ satisfaction. A descriptive study with survey method was implemented to 71 physics education students who attended online physics learning. The instrument in this research was a Students’ Satisfaction of LMS3 Questionnaire (S2LMS3Q). The average percentage determined the level of student’s satisfaction, and multiple correlations and multiple regressions determined the predictor variables. The level of satisfaction in using LMS3 reached a high level with an average of 76.03%. At the 0.01 significance level, the adjusted R2 value of four predictor variables was 0.393. The multiple correlation analysis showed β for each predictor variable were 0.34 for gender, 0.07 for age, 0.43 for experience in using LMS, and 0.13 for internet connection. In conclusion, the level of students’ satisfaction was high, and the most influential predictor variables were the experience in using LMS and age. This study suggests an in-depth evaluation of online learning through students’ perceptions in order to improve the quality of further learning.
Co-Authors A. Samsudin A. Suhandi B. Subali B. Waldrip Damayanti, Elok Ellianawati, Ellianawati F. C. Wibowo H. Firman Ida Hamidah Ida Kaniawati Liliasari , Mansyur, J. N. Y. Rustaman Rahmawati, R. Rizal, R. Siahaan, P. Supriyatman, Supriyatman W. Setiawan, W.